Sharp VT-G14 Service Manual

POWER CONSUMPTION 112 W SERIAL NO. Jxxxxxxxxx SHARP CORPORATION In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. SHARP CORPORATION TV/VCR COMBINATION TELEVIDEO Chassis No. VP-7 MODELS WARNING The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user — serviceable parts inside. Refer servicing to qualified service personnel. VT-G14 VT-G21 SERVICE MANUAL S11N9VT-G14// Ë Full Auto Search Tuning System Ë On Screen Digital Channel/Sound Level/Tuning Display, Control (Contrast, Colour, Brightness, Tint, Sharpness, White temp) Symbol and Level Ë Blue Back Off Timer Ë 39 Key, Wireless Remote Control Unit Ë Channel Skip Ë High Speed and Double Speed Video Search System » PAL/MESECAM : 3 times/7 times (SP/LP) » NTSC : 3 times/5 times (SP/LP) 5 times/15 times (EP) VT-G14 VT-G21 FEATURE Ë DPSS (Digital Program Search System) Ë Quick Start Playback with Full Loading System Ë Digital Automatic Tracking Control Ë Automatic Playback Function Ë AHC (Automatic Head Cleaning System) Ë Sharp Super Picture Ë 345 Times Hi-Speed FF/REW MODEL VT-G21 CAUTION : DANGEROUS VOLTAGE INSIDE TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. Example of suffix symbol: The component parts of this model are partially different depending on their suffix symbols. Before servicing the units, be sure to check the suffix symbol on the model label that is applied on the back of the unit. Suffix "J" for Russia

» IMPORTANT SERVICE NOTES.................................... 4 » LOCATION OF USER'S CONTROL .............................. 5 » DISASSEMBLY AND REASSEMBLY ............................ 7 » ADJUSTMENT OF THE TV ELECTRICAL CIRCUITRY ................................................................. 10 » PRECAUTIONS IN REASSEMBLING......................... 24 » FUNCTION OF MAJOR MECHANICAL PARTS ......... 25 » ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS ....................... 27 » ADJUSTMENT OF THE VCR ELECTRICAL CIRCUITRY ................................................................. 46 » TROUBLESHOOTING ................................................ 48 » CHASSIS LAYOUT...................................................... 68 » BLOCK DIAGRAM OF TV SECTION .......................... 70 » DESCRIPTION OF TV SECTION SCHEMATIC DIAGRAM .............................................. 74 » SOLID STATE DEVICE BASE DIAGRAM ................... 75 » WAVEFORMS ............................................................. 76 » BLOCK DIAGRAM OF VCR SECTION ....................... 90 » DESCRIPTION OF VCR SECTION SCHEMATIC DIAGRAM .............................................. 99 » PRINTED WIRING BOARD ASSEMBLIES ............... 106 » REPLACEMENT PARTS LIST ...................................114 » PACKING OF THE SET ............................................ 134 Page Page

Power Source: 110~240 V AC, 50/60 Hz Power Consumption: VT-G14 : 94 W VT-G21 : 112W Receiving Broadcast Standard: B/G, I, D/K, M Receiving Channel: VHF; 1A~S36 UHF; S37~C57 Receiving System: Sound; 5.5/6.0/6.5/4.5 MHz Colour; PAL/SECAM/NTSC Antenna Input Impedance: VHF/UHF; 75 ohm Unbalanced (DIN) Video Signal: Input; 0.5~2.0 Vp-p/75 ohm (RCA) Output; 1.0 Vp-p/75 ohm (RCA) Audio Signal: Input; 0.5 Vrms/10k ohm (RCA) Output; 0.5 Vrms/1k ohm (RCA) (54% MOD) Temperature: Operation; 5°C to 40°C Storage; -10°C to 60°C Dimensions (Approx.): VT-G14 : 378 mm (W) × 387 mm (H) × 384 mm (D) VT-G21 : 505 mm (W) × 503 mm (H) × 478 mm (D) Weight (Approx.): VT-G14 : 12.7 kg VT-G21 : 23.5 kg Cabinet Material: Plastic Accessories: Operation Manual Infrared Remote Control Unit Dry Batteries, Type AA (×2 pcs.) ËTV SECTION Viewing Area: VT-G14 : 33.54 cm Diagonal Measurement VT-G21 : 50.8 cm Diagonal Measurement Picture Power: VT-G14 : 22.0 kV at 800 µA Beam Current VT-G21 : 25.0 kV at 1100 µA Beam Current Speaker Output: VT-G14 : 3.0 W at Max. (5×9 cm oval type ×1pc.) VT-G21 : 3.0 W at Max. (5×9 cm oval type ×2pcs.) Picture Tube: Type; VT-G14 : VB370BVBK1S-S (Tint Tube) VT-G21 : VB540ADAC1S*S (Tint Tube) Heater; VT-G14 : 6.3 V, 300 mA VT-G21 : 6.3 V, 600 mA Focus; High Bi-Potential Electrostatic ËVCR SECTION Outline: VHS Video System Colour Video Cassette Recorder Format: VHS PAL/NTSC Standard Video Recording System: Rotary Slant Azimuth 2-Head Helical Scan System Luminance: FM Recording Chrominance: Low Frequency Converted Direct Recording Video Signal System: PAL/SECAM(MESECAM Rec)/NTSC 3.58MHz Colour Cassette Tape: VHS Type Video Cassette Tape Tape Width: 12.7 mm Tape Speed: PAL ; 23.39 mm/s (SP), 11.70 mm/s (LP) NTSC ; 33.35 mm/s (SP), 16.68 mm/s (LP·PB only), 11.12 mm/s (EP) Recording/Playback Time: SP ; Max. 240 min (with E-240) LP ; Max. 480 min (with E-240, PAL only) EP ; Max. 480 min (with T-160, NTSC only) Note: The antenna must correspond to the new standard DIN 45325 (IEC 169-2) for combined UHF antenna with 75 ohm connector. Specifications are subject to change without prior notice.

Maintenance and repair of this receiver should be done by qualified service personnel only. SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE When servicing the high voltage system, remove static charge from it by connecting a 10k ohm Resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead. (AC line cord should be disconnected from AC outlet.) 1. Picture tube in this receiver employs integral implosion protection. 2. Replace with tube of the same type number for continued safety. 3. Do not lift picture tube by the neck. 4. Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely. X-RAY This receiver is designed so that any X-Ray radiation is kept to an absolute minimum. Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed: 1. VT-G14: When repairing the circuit, be sure not to increase the high voltage to more than 25.3 kV, (at beam 0 µA) for the set. VT-G21: When repairing the circuit, be sure not to increase the high voltage to more than 29.3 kV, (at beam 0 µA) for the set. 2. VT-G14: To keep the set in a normal operation, be sure to make it function on 22.0 kV + 1.5 kV – 2.0 kV (at beam 800 µA) in the case of the set. The set has been factory – Adjusted to the above-mentioned high voltage. VT-G21: To keep the set in a normal operation, be sure to make it function on 25.0 kV ± 1.5 kV (at beam 1100 µA) in the case of the set. The set has been factory – Adjusted to the above-mentioned high voltage. ∴ If there is a possibility that the high voltage fluctuates as a result of the repairs, never forget to check for such high voltage after the work. 3. Do not substitute a picture tube with unauthorized types and/or brands which may cause excess X-ray radiation. BEFORE RETURNING THE RECEIVER Before returning the receiver to the user, perform the following safety checks. 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver. 2. Inspect all protective devices such as non-metallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capac- ity networks, mechanical insulators etc.

Front AV-1 IN OUT VIDEO AUDIO AV-1 IN OUT VIDEO AUDIO This service manual is for VT-G14 and VT-G21. The illustration of VT-G21 are used in this service manual. Rear VIDEO OUTPUT ANTENNA IN terminal AUDIO INPUT AUDIO OUTPUT VIDEO INPUT HEADPHONE jack (Speaker audio turns off when connected to a pair of headphones) POWER button VIDEO/AUDIO INPUT terminals STOP/EJECT button FF (Forward Video Search) button PLAY button REW (Reverse Video Search) button PRESET button CHANNEL UP/DOWN buttons VOLUME UP/DOWN buttons SHARP SUPER PICTURE button (This function will create a clearer image during playback.) REC (Recording) button REC indicator PROGRAM TIMER indicator CHILD-LOCK indicator POWER/WAKE-UP TIMER indicator Infrared sensor window STANDBY/ON button

TV/VIDEO CH PLAY STOP REW REC PAUSE DPSS PROG MENU TV•VCR COMBINATION SET RETURN CONFIRM FF TR 1 2 3 4 5 6 7 8 0 9 COUNTER RESET TAPE SPEED TIMER ON/OFF RETURN button CONFIRM button • Used to confirm the programme setting. REW button • Used to rewind the tape or to conduct Reverse Video Search during playback mode. Remote Control REC button • Used to record a programme. STANDBY/ON button CHANNEL SELECT buttons FLASHBACK button Returns to previously viewed channel. TAPE SPEED button • Used to select the recording tape speed. PLAY button • Used for tape playback. • Used to cancel the PAUSE/ STILL mode and return to nor- mal playback operation. SET button TV/VIDEO Select button Infrared Transmitter Window MUTE button Press → Mutes sound. Press again → Restores sound to previous level. VOLUME UP/DOWN buttons CHANNEL UP/DOWN buttons (TRACKING ±/—) • Used to select the CHANNEL. • Used to adjust the TRACK- ING while playing the tape. COUNTER RESET button • Used to reset the tape counter. CHILD-PROOF LOCK button • Used to lock any selected mode. FF button • Used to fast forward the tape or to conduct Forward Video Search during playback mode. STOP button • Used to stop the tape. PAUSE button • Used to temporarily stop the tape during recording mode. • Used to display a still picture during playback mode. DPSS buttons • Press the ( / ) button to search for the index signal and begin playback auto- matically. PROGRAMME button • Press the button to set the programme Timer. MENU button • Used to select the menu screen. Inserting batteries Pull up ±, — buttons TIMER ON/OFF button Installing dry batteries in the remote control unit Before using the TV set for the first time, install the supplied dry batteries in the remote control. ! With your thumb nail, pull up the slit as indicated by the arrow to remove the back cover. @ Insert two batteries (size “AA”). Be sure to match the battery ±/— terminals with the ±/— marks inside the compartment. # Replace the battery cover. • Remove batteries if weak or if the unit is not in use for long periods. • Do not mix old and new batteries. • Incorrect installation of the batteries may damage the remote control. DISPLAY button • Used to display the different current settings on the screen.

1. Remove the 10 rear cover fixing screws and detach the rear cover. 2. Take out the anode cap, CRT PWB, connectors F, G and AO, coating ground, SP chip, fixing screws and others. 3. Remove the 2(VT-G14)/1(VT-G21) Main PWB fixing screws and take out the Main PWB unit and the Power PWB. 4. Remove the 4 Power PWB fixing screws, and take out the Power PWB unit. G 3 F AO 2 (VT-G14 only) 4 1 1 VT-G21 VT-G14

5. Remove the 7 VCR fixing screws, and detach the shielding case. 6. Remove the 4 cassette housing control fixing screws, and detach the cassette housing control. 7. Remove the 4 mechanism chassis fixing screws, and detach the mechanism chassis from the Main PWB. 8. Remove the 3 Main PWB fixing screws, and detach the Main PWB. 9. Remove the 4 Tuner/Def and IF PWB fixing screws, and detach the Tuner/Def and IF PWB. 5 6 7 7 7 8 9

For servicing any of the components inside, disconnect the lead dressing holder. Position the main PWB unit upright as shown below and connect the leads for starting the services. 70~80° Note: Fit the VCR unit the front cabinet with the front flap door tilted at 70~80°. K FRONT F G B B AJ AJ AV AM AN PA PA PB PB SP AN AM AV H AO AO K H

ADJUSTMENT PRECAUTIONS 1. Calling the service mode Get the service test points (TP1002 and TP1003) of the set short-circuited. 2. Getting out of the service mode Get the above service test points open. 3. On-screen display in the service mode A service mode item and its data appear in two lines at the lower left on the screen. Top line : Service mode item (See below) Bottom line : Data (See below) Service mode Item Display Data Variable range DIRECT MODE DIRCT Adjustable in the DIRECT MODE V-AMPLITUDE V-AMP 0 ~ 127 R CUT OFF (0 ~ 255) V-LINEARITY V-LIN 0 ~ 31 G CUT OFF (0 ~ 255) V-OUT PHASE V-POS 0 ~ 7 B CUT OFF (0 ~ 255) H-POSITION H-POS 0 ~ 31 G DRIVE GAIN (0 ~ 255) BELL FILTER BELL 0 ~ 3 B DRIVE GAIN (0 ~ 255) R-Y BLACK OFFSET R-Y 0 ~ 15 B-Y BLACK OFFSET B-Y 0 ~ 15 Y-SUB CONTRAST CONT 0 ~ 31 SUB COLOUR COLOR 0 ~ 240 SUB BRIGHT BRI 0 ~ 150 SUB TINT TINT 0 ~ 37 `NICAM D/K N-D/K 0 ~ 1 `IF INT/EXT IF-IN 0 ~ 1 `AGC GAIN AGCGA 0 ~ 31 `AGC OFF AGCOF 0 ~ 1 `FM SOUND ID FMID 0 ~ 3 `AUTO MUTE AMUTE 0 ~ 1 `NICAM LOW ERROR LIMIT NERRL 0 ~ 255 `NICAM UP ERROR LIMIT NERRU 0 ~ 255 `NICAM OUT LEVEL B/G B/G 0 ~ 31 `NICAM OUT LEVEL I I 0 ~ 31 `NICAM OUT LEVEL D/K D/K 0 ~ 31 `NICAM OUT LEVEL M M 0 ~ 31 `FM OUTPUT LEVEL FM 0 ~ 31 Note : 1) Item selectable by the CH '" buttons and data by the VOL '" buttons (effective on both the remote controller and the set) 2) `This item is not used with the VT-G14 and VT-G21 (but displayed on the screen).

1. DIRECT mode F-B/W 0 - > 1 (forced B/W) 2. DIRECT mode + HOR. POS. mode DRV CNT 0 - > 1 (drive forced center) SUB-BRIGHT Initial value R.G.B. CUTOFF 0 (E2PROM data resumed when any of the “0” thru “9” buttons on the remote controller is pressed) 3. R-Y Black Offset CONTRAST MAX (USER-CONTROL) BRIGHT MAX (USER-CONTROL) COLOUR CENTER (USER-CONTROL) R-MONITOR SW 0 - > 1 (MONITOR OUT) MUTE MODE Y-MUTE 4. B-Y Black Offset CONTRAST MAX (USER-CONTROL) BRIGHT MAX (USER-CONTROL) COLOUR CENTER (USER-CONTROL) B-MONITOR SW 0 - > 1 (MONITOR OUT) MUTE MODE Y-MUTE 5. SUB Tint MUTE MODE Y-MUTE 6. Unspecified items PICTURE NORMAL (CONT. BRI. COL.) Note : All the settings will be back to the initial ones when shifting into any other mode or getting out of the service mode. Allocation of special buttons in the service mode `HORIZONTAL POSITION CONFIRM (SET -> S-PICTURE) `Y-MUTE SET `COLOUR MAX./MIN. select TIMER ON/OFF `DIRECT TUNING MODE RETURN `VCR SLOW TEST PROG `NVM MODE DISPLAY Adjustment precautions 1) Basically follow the sequential order of adjustments. (Unless otherwise specified, follow the adjustment procedures.) 2) The “`”-marked steps in the adjustment procedures are automatically taken when in the service mode. Leave out these steps. 3) For adjustments in the service mode, it is necessary to have the remote controller at hand. The numeric keys on the remote controller work as follows in the DIRECT mode only. UP DOWN R CUT OFF 1 4 G CUT OFF 2 5 B CUT OFF 3 6 G DRIVE GAIN 7 õ Õ B DRIVE GAIN 8 0 Notes : In all the other modes, these buttons are used to select channels. In the DIRECT TUNING mode, these buttons are used to enter data.

Initial settings of adjustment items Item Variable range Initial setting R CUT OFF 0 ~ 255 0 G CUT OFF 0 ~ 255 0 B CUT OFF 0 ~ 255 0 V-AMPLITUDE 50Hz 0 ~ 127 35 V-AMPLITUDE 60Hz 0 ~ 127 37 V-LINEARITY 50Hz 0 ~ 31 25 V-LINEARITY 60Hz 0 ~ 31 18 V-OUT PHASE 50Hz 0 ~ 7 06 V-OUT PHASE 60Hz 0 ~ 7 03 HORIZONTAL POSITION 50Hz 0 ~ 31 08 HORIZONTAL POSITION 60HZ 0 ~ 31 12 Y-SUB CONTRAST 0 ~ 31 0 SUB-COLOUR 0 ~ 240 91 SUB-BRIGHT 0 ~ 150 100 G-DRIVE GAIN 0 ~ 255 128 B-DRIVE GAIN 0 ~ 255 128 SUB-TINT 0 ~ 37 18 BELL FO 0 ~ 3 01 R-Y BLACK OFFSET 0 ~ 15 8 B-Y BLACK OFFSET 0 ~ 15 8 PICTURE Adjust User setting Initial setting : NORMAL (CONTRAST at MAX, others at CENTER) Trouble indicators If the set is interrupted by the protectors, the following indicators work to identify a spot in trouble. 1) LED (red) flashing : Deflection system protector activated (high-voltage or beam protector) 2) REC LED flashing : I2C bus line error (VCJ or tuner, EEPROM) 3) LED off : Power protector activated (+B line short-circuited) Model number In-house product code Sound system On-screen display language Geomagnetism adjustment V H Background y x 45,000nT(0.45G) Russian D/K A3HEG14VJ VT-G14 20,000nT(0.20G) 7,500°K 0.300 0.310 VT-G21 A3HEG21VJ D/K Russian 45,000nT(0.45G) 20,000nT(0.20G) 7500K 0.300 0.310 Factory settings

1. TUNER IFT : TU201 (preset) 1. Get the tuner ready to receive the E-9CH signal, but with no signal input. Adjust the PLL data. 2. Connect the sweep generator’s output cable to the tuner antenna. (RF sweep) 3. Adjust the sweep generator’s output level to 80 dBµV. 4. Connect the response lead (use a low-impedance probe with wave detector; see Fig.1) to the tun- er’s IF output terminal. (This terminal must have the probe alone con- nected.) 5. Set the RF AGC voltage to 0V ~ 6V with no con- tact with the waveform. 6. Adjust the tuner IF coil to obtain the waveform as shown in Fig. 2. Note : Be sure to keep the tuner cover in posi- tion during this adjustment. Fig. 1 IF-OUT 1000p 10kΩ 75Ω 1000p 100kΩ Oscilloscope E-9CH P C – 1.5dB Fig. 2 1. VCO coil (T253) 1) Disconnect the antenna from the tuner antenna terminal. 2) Apply DC voltage to pin (4) (IF AGC, TP252) of IC251. » DC voltage: 6.0 ± 0.1 V 3) Using a digital voltmeter, measure the DC volt- age at pin (20) (PLL FIL, TP253) of IC201. » (The digital voltmeter must be able to take readings down to the third decimal place.) 10 kHz at 0.007 V 4) Relieve TP252 of the DC voltage. 5) Reconnect the antenna in position and receive the E-12CH signal. » (With the AFT off, adjust the receiving fre- quency to 224.25 MHz.) 6) Connect the DC digital voltmeter to TP253. Adjust T253 so that the voltmeter should read the same voltage as in Step 3). » Allowable error: 0.015 V (20 kHz) 2. AFT coil (T254) 1) Receive the E-12CH signal in the same condi- tion as in Step 5) above. 2) Connect the oscilloscope to pin (1) (AFT, TP251) of IC251. 3) Adjust T254 so that the DC voltage reading be 3.3 V. » 3.3 ± 0.1 V (from the 0-6.6 V variable range) 2. VCO and AFT ADJUSTMENT : T253 (VCO), T254 (AFT) 6V 3.3V DOWN A B' B B" C UP DC voltage at TP251 Fig. 3

Ë ËË ËË PIF/AFT/AGC ADJUSTMENT(Continued) 3. RF AGC CUT-IN ADJUSTMENT: R265 1. Receive the “E-12CH” (PAL COLOUR BAR) sig- nal. » Field strength: 57 ± 1 dBµV (75 ohms open) 2. Connect the oscilloscope to TP201, as shown at right. 3. Turn R265 to have the highest voltage. 4. Turn R265 slowly in the opposite direction until the voltage goes down 0.1 V below the highest level. 5. Adjust the signal level to 63 ~ 67 dBµV and make sure there is no noise. 6. Now adjust the signal level to 90 ~ 95 dBµV and make sure there is no chrominance modulation beat. Note : If a 50 ohm field strength meter is used without a 50/75 impedance converter, set the field strength to 55 ±1 dBµV. Pay atten- tion to a loss that would be caused with the converter. Oscilloscope 0.1V TV Set Bias box TP201 + + – – Fig. 4

Left Right Beam landing shifted to right. Left Right Beam landing shifted to the left. Ë ËË ËË PURITY ADJUSTMENT 1. PURITY ADJUSTMENT 1. First of all, let a beam current of over 700µA flow in the set to warm it up for 30 minutes or longer. (over 400 µA for VT-G14). 2. Keep the purity magnet in the zero magnetic field in advance. Roughly adjust the static conver- gence. 3. Receive the green-only colour signal. Adjust the beam current to about 770 µA. (about 500 µA for VT-G14) 4. Degauss the cathode ray tube enough with the degaussing coil. ADJUSTMENT Eastward magnetic field specified 1) Observe the beam landings “a” and “b”, as shown in Fig. A, through a microscope. Ad- just the landings as specified. 2) If the right and left landings are equally out- ward as shown in Fig. B, move the deflection yoke forward. 3) If the right or left landing is shifted to the right or to the left, as shown in Fig. C and Fig. D, adjust the opening angle of the purity magnet. 4) Make sure the right and left beam landings are just as specified about the screen center. Now check the cathode ray tube corners. Be sure that all the landings are at rank “B”. 5) If any other colour appears on the screen, move the deflection yoke back and forth. LANDING ERROR » Outward: Move the deflection yoke forward. » Inward: Move the deflection yoke backward. 6) Receive the monoscope pattern signal. RASTER ROTATION 7) Adjust the raster rotation to “0” eastward. » Adjustment error : 0 ±2 mm 8) Tighten up the deflection coil screws. » Tightening torque : 11±2 kg Note : Each time the single-colour button is pressed, the screen colour changes as follows. Fig. A Fig. B Fig. C Fig. D Green-only screen Red-only screen Single-colour screen cleared Blue-only screen

1.CONVERGENCE ADJUSTMENT (to be done after the purity adjustment) Wedge "a" Lacquer Wedge "b" Wedge "c" Approx.100° Approx.100° 4-pole magnet 6-pole magnet CRT neck Lacquer Purity magnet 1. Receive the crosshatch pattern signal. 2. Using the remote controller, call the Normal mode. STATIC CONVERGENCE 1. Turn the 4-pole magnet to a proper opening an- gle in order to superimpose the blue and red col- ours. 2. Turn the 6-pole magnet to a proper opening an- gle in order to superimpose the green colour over the blue and red colours. DYNAMIC CONVERGENCE 1. Adjust the convergence on the fringes of the screen in the following steps. » Fig. a : Drive the wedge at point “a” and swing the deflection coil upward. » Fig. b :Drive the wedges at points “b” and “c” and swing the deflection coil downward. » Fig. c : Drive the “c” wedge deeper and swing the deflection coil rightward. » Fig. d :Drive the “d” wedge deeper and swing the deflection coil leftward. 2. Fix all the wedges on the cathode ray tube and apply glass tape over them. 3. Apply lacquer to the deflection yoke lock screw, magnet unit (purity, 4-pole and 6-pole magnets), and magnet unit lock screw. Finally receive the red-only and blue-only colour sig- nals and make sure there is no other colour mixed on the screen. Fig. a Fig. b Fig. c Fig. d Fig. 5 B G R B G R R G B B G R R G B R G B B G R R G B

1.CRT CUT-OFF (I2C bus data adjustment) 1. Receive the monoscope pattern signal. 2. Put the set in the service mode and call up the DIRECT mode (DIRCT). 3. Set the screen control to 0/10 position. 4. Press the “CONFIRM” button on the remote controller to reach the horizontal centering mode. (S-PICTURE button on the set) 5. Turn the screen control clockwise until the horizontal raster of the first glimmering colour becomes slightly visible. 6. Adjust the cut-off data of the other two colours until the horizontal raster becomes whitish. Note : The data can be turned up and down with the above buttons. » R CUT OFF UP “1” BUTTON » G CUT OFF DOWN “5” BUTTON » R CUT OFF DOWN “4” BUTTON » B CUT OFF UP “3” BUTTON » G CUT OFF UP “2” BUTTON » B CUT OFF DOWN “6” BUTTON 7. Turn the screen control counterclockwise until the horizontal raster disappears. Note : Before starting this adjustment, warm up the unit for 30 minutes or longer at a beam current of over 700 µA (over 600 µA for VT-G14). 8. Press the “CONFIRM” button on the remote controller to call up the NORMAL mode. (S-PICTURE button on the set) SUB-BRIGHTNESS (I2C bus data adjustment) 9. Using the remote controller, call the SUB-BRIGHT setting mode (BRI). (Receive the crosshatch and gray scale signal.) 10.Set the sub-brightness data so that the third black portion (1st to 5th counted from the left of the screen) of the window pattern looks sinking. Note : The service mode adjustment in the above steps 9. and 10. should be carried out after the white balance and background adjustments. 11.Exit from the service mode. 2. WHITE BALANCE AND BACKGROUND (I2C bus data adjustment) 1. Receive the monoscope pattern signal. 2. Put the set in the service mode and call up the DIRECT mode (DIRCT). 3. Connect the beam ammeter between TP601 and TP602. 4. Using the sub-contrast control, roughly adjust the beam current to about 1,000 µA (about 700 µA for VT-G14). 5. Adjust the G-drive and B-drive data to have a colour temperature of 7,500°K (white). » 7,500°K x : 0.300 y : 0.310 (with a Minolta colour temperature meter CA-100) Note : The data can be turned up and down with the above buttons. » G-DRIVE UP “7” BUTTON » B-DRIVE UP “8” BUTTON » G-DRIVE DOWN “ õ Õ ” BUTTON » B-DRIVE DOWN “0” BUTTON 6. Adjust the contrast and brightness controls to have the beam current of 200 µA or so. Now check the back- ground colour. If the colour temperature is not as specified, go back to No. 1 on the preceding page. 7. Exit from the service mode. Note : Before starting this adjustment, warm up the unit for 30 minutes or longer at a beam current of over 700 µA (over 600 µA for VT-G14).

3. SUB-CONTRAST (I2C bus data adjustment) 1. Receive the crosshatch pattern signal. 2. Put the set in the service mode and select the SUB-CONTRAST mode (CONT). 3. Adjust the sub-contrast data to "10" (VT-G21)/ "0" (VT-G14). 4. Exit from the service mode. Note : The selected channels in parentheses have the following signals. Monoscope pattern (50 Hz) signal Fig.6 A B Ë ËË ËË HORIZONTAL AND VERTICAL CIRCUIT ADJUSTMENT 1. SERVICE MODE DATA ADJUSTMENT Put the set in the service mode. Turn up or down the data for this adjustment. I2C bus data adjustment » V-AMP 50 Hz A) Select the V-AMP mode (V-AMP). Adjust the overscan to 10% . » V-LINEARITY 50 Hz B) Select the V-LIN mode (V-LIN). Adjust to get the best linearity. » V-OUT PHASE 50 Hz (V-CENTER) C) Select the V-OUT POS mode (V-POS). Align the screen center with the cathode ray tube’s geo- metrical center. » H-POS 50 Hz (H-CENTER) D) Select the H-POS mode (H-POS). Make the dis- tances “A” and “B” on both sides equal. Exit from the service mode. Adjust point Fig.7 2. FOCUS ADJUSTMENT 1. Receive the monoscope pattern signal. 2. Make the PICTURE ADJUST setting to NORMAL. 3. Adjust the focus control so that the middle areas between the pattern’s center and the screen’s both ends be in the best focus. For the V-AMP 60 Hz, V-LINEARITY 60 Hz, V-OUT PHASE 60 Hz, and H-POS 60 Hz adjustments, their corrected data are automatically entered when the corresponding 50 Hz mode adjustments are made. Check these data on the 60 Hz mode screen. Readjust any of them if required. (The 50 Hz and 60 Hz modes are selected on the screen.) Once the adjustment has been made in the 60 Hz mode, do not change it in the 50 Hz mode.

1. SUB-COLOUR ADJUSTMENT (I2C bus data adjustment) 1. Receive the PAL colour bar signal. 2. Put the set in the service mode. 3. Select the sub-colour mode (COL). 4. Connect the oscilloscope to TP855 (RED cathode). (Use a 10 : 1 probe.) (TP852 for VT-G14) » Range: 20 V/div. » Sweep time: 20 µsec/div. 5. Adjust the sub-colour data so that the 75% white and red portions of the PAL colour bar be at the same level. See Fig. 8. 6. Exit from the service mode. » When getting out of the SUB-COLOUR mode, the sub-colour data turns up 15. W Y CY G MG R B To be at the same level Fig.8 Ë ËË ËË SECAM CHROMA ADJUSTMENT 1. BELL FILTER (ƒ0) (I2C bus data adjustment ) (adjustment not required) 1. Receive the SECAM colour bar signal. 2. Put the set in the service mode. 3. Select the BELL FILTER (f0) mode (BELL). 4. Adjust the data to 1. 5. Exit from the service mode. W Y CY G MG R B About 3 Vp-p Fig.9 Ë ËË ËË NTSC CHROMA ADJUSTMENT 1. SUB-TINT ADJUSTMENT (I2C bus data adjustment) 1. Receive the NTSC colour bar signal. 2. Put the set in the service mode. 3. Select the SUB-TINT mode (TINT). 4. Connect the oscilloscope to TP802 (B-Y OUT). » Range : 10 mV/div. (AC) » Sweep time : 10 µsec/div. (Use a 10 : 1 probe.) 5. Adjust the sub-tint data to obtain the waveform as shown in Fig. 9. 6. Exit from the service mode.

2. SECAM BLACK LEVEL (R-Y/B-Y) and BLACK OFFSET ADJUSTMENT (I2C bus data adjustment) 1. Receive the SECAM colour bar signal. 2. Call the service mode. 3. Select the R-Y black offset mode (R-Y). 4. Connect the oscilloscope to pin (36) (B-Y OUT, TP802) of IC801. » Range : 10 mV/div. » Sweep time : 5 µsec/div. (Use a 10 : 1 probe.) 5. Vary the data so that the back porch and the white level should become at the same level. See Fig. 10. 6. Select the B-Y black offset mode (B-Y). 7. Reconnect the oscilloscope to pin (35) (B-Y OUT, TP801) of IC801. Keep the same conditions as in Step 4. above. 8. Vary the data so that the back porch and the white level should become at the same level. See Fig. 11. 9. Quit the service mode. 10.Finally adjust the colour control to the MAX and MIN positions to make sure there is no change in the background. Fig.10 Fig.11 Y W CY To be at the same level Back porch Y W CY Y W CY To be at the same level Back porch

1. VIDEO and AUDIO OUTPUT CHECK 2. VIDEO and AUDIO INPUT CHECK 1. Receive the PAL colour bar. 2. Feed the video and audio signal via the A/V input jacks. 3. Using the CH '/" buttons on the remote con- troller, change to the AV mode and make sure the external video and audio outputs are accordingly given. (The AV mode can be picked up between 1CH and 0CH.) CH ' 99 → 0 → AV1 → AV2 → 1 → 2 CH " 2 → 1 → AV2 → AV1 → 0 → 99 » The AV mode may also be picked up using the TV/VIDEO button on the remote controller. A A V V J401(Rear) AV1 J1401(Front) AV2 A A V V OUT J401 (Rear) AV1 1. Receive the PAL colour bar signal. (100% white colour bar, 400 Hz, 100% modula- tion audio) 2. Terminate the video output with a 75Ω impedance. Make sure the output is as specified (1.0 Vp-p ± 3 dB). 3. Terminate the audio output with a 10k ohm im- pedance. Make sure the output is as specified (2.6 Vp-p ± 3 dB). » Be sure that the audio output corresponds to the video output on the screen. Ë ËË ËË PROTECTOR PERFORMANCE CHECK 1. BEAM PROTECTOR 1. Receive the monoscope pattern signal. 2. Set the contrast control to maximum. 3. Set the brightness control to maximum. 4. Make a short-circuit between the collector and emitter of Q1801 and make sure that the protec- tor is activated and the stand-by mode is called. (The POWER LED indicator starts flashing in red.) 2. HIGH-VOLTAGE PROTECTOR 1. Receive the monoscope pattern signal. 2. Connect the bias box to TP603. 3. Adjust the bias box voltage to 20 V and make sure that the protector is not activated. Note : Normally about 19 V 4. Adjust the bias box voltage to 25 V and make sure that the protector is activated. 3. OTHER PROTECTORS » In checking the performance of other protectors — for example, the one against shorting of smoothing electrolytic capacitor of +B line —, pay attention not to damage or deteriorate any related element.

1. CONTRAST 1. Receive the mono scope pattern signal. 2. Using the PICTURE ADJUST control, select CON- TRAST. 3. The contrast must be changeable with the +/- button. 2. COLOUR 1. Receive the PAL colour bar signal. 2. Using the PICTURE ADJUST control, select COL- OUR. 3. The colour must be changeable with the +/- but- ton. (There must be no colour at the MIN position.) 3. BRIGHTNESS 1. Receive the monoscope pattern signal. 2. Using the PICTURE ADJUST control, select BRIGHT. 3. The black level must be changeable with the +/- button. R/C MENU BUTTON →PICTURE ADJUST →CONTRAST →COLOUR →BRIGHT →TINT →SHARPNESS →NORMAL 4. TINT 1. Receive the NTSC colour bar signal. 2. Using the PICTURE ADJUST control, select TINT. 3. The tint must be changeable toward green with the + button and toward red with the - button. 5. PIC-NORMAL 1. With the PICTURE ADJUST control, select NORMAL. Make sure the following normal settings are displayed. Here are the normal settings. » Contrast : MAX (60) » Colour : CENTER (0) » Brightness : CENTER (0) » Tint : CENTER (0) » Sharpness : CENTER (0) 6. SHARPNESS 1. Receive the monoscope pattern signal. 2. Using the PICTURE ADJUST control, select SHARPNESS. 3. The sharpness must be changeable with the +/- button. 7. CHANNEL SIGN DISPLAY COLOUR 1. The display colour of all the channel (0 ~ 99) signs must be green (AFT on).

8. COLOUR SYSTEM 1. Receive the PAL colour bar signal. Using the COL- OUR SYSTEM button, select a mode other than AUTO/PAL and make sure the colour system does not work properly. 2. Receive the SECAM colour bar signal. Using the COLOUR SYSTEM button, select a mode other than AUTO/SECAM and make sure the colour system does not work properly. 3. Receive the NTSC 4.43 colour bar signal. Using the COLOUR SYSTEM button, select a mode other than N4.43 and make sure the colour sys- tem does not work properly. 4. Receive the NTSC 3.58 colour bar signal. Using the COLOUR SYSTEM button, select a mode other than AUTO/N3.58 and make sure the col- our system does not work properly. Note : When the NTSC 4.43 colour bar special sig- nal is used in the AUTO mode, the colour sys- tem does not work. (Check in the forced mode.) R/C MENU BUTTON →SYSTEM →COLOUR SYSTEM →SOUND SYSTEM 9. SOUND SYSTEM 1. Receive the sound system D/K signal. Using the SOUND SYSTEM button, select M, B/G and I modes and make sure the sound system does not work properly. 2. Receive the sound system I signal. Using the SOUND SYSTEM button, select M, B/G and D/K modes and make sure the sound system does not work properly. 3. Receive the sound system B/G signal. Using the SOUND SYSTEM button, select M, I and D/K modes and make sure the sound system does not work properly. 4. Receive the sound system M signal. Using the SOUND SYSTEM button, select B/G, I and D/K modes and make sure the sound system does not work properly.

Pulley feed gear Screwdriver Tilt mark (*1) Casecon drive gear Drive angle of cassette control INSTALLING THE CASSETTE CONTROLLER When the cassette controller is installed on the mecha- nism, the initial setting is essential condition. There are two initial setting methods, namely electrical and mechanical. 1. Electrical initial setting Make a short-circuit between TP7701 and TP7702 then plug in the AC cord and be sure that the mechanism is back to its initial setting position (*1). Now install the cassette controller in position. (Conditions: When mecha- nism and PWB have been installed) INSTALLING THE MECHANISM ON PWB Lower vertically the mechanism, paying attention to the mechanism edge, and install the mechanism with due care so that the parts are not damaged. So as to fix the mechanism to the main PWB tighten up the two screws. (One for fixing the mechanism and the head amplifier shield, the other on the main PWB's soldering side and located near the loading motor.) Connect again the FFC cable (AA-MH, AD-ME, AH-MZ) between the mecha- nism and the main PWB. PARTS WHICH NEED PARTICULAR CARE When installing the mechanism chassis on the PWB unit, take care so as to prevent deformation due to contact of mechanism chassis with Rec tip switch (S7701), Start sensor (Q7703) and End sensor (Q7704). 2. Mechanical initial setting Feed the pulley feed gear of loading motor with screw driver. After ascertaining the return to the initial set position (*1) install the cassette controller in the speci- fied position. (This method is applied only for the mecha- nism.) END SENSOR REC TIP SW AE CONNECTOR AL CONNECTOR START SENSOR AC CONNECTOR

2 Supply pole base ass'y 3 Tension arm ass'y 4 Idler wheel ass’y 5 Pinch drive lever ass’y 6 Supply reel disk 7 Supply main brake ass'y 8 Take-up main brake ass'y 9 Pinch drive cam 10 A/C Head ass’y 11 Reverse guide lever ass'y 12 Casecon drive gear 13 Take-up reel disk 14 Pinch roller lever ass’y 15 Drum ass'y 16 Loading motor 17 Drum motor 18 Take-up pole base ass'y 27 Fixing guide 28 Impedance roller ass'y (VT-G21) 17 15 10 27 11 5 9 14 12 8 16 13 4 6 2 7 3 1 18 28 FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW)

No. Function No. Function 19 Slow brake 20 Master cam 21 Capstan D.D. motor 22 Reel belt 23 Clutch lever 24 Limiter pulley ass'y (12) Casecon drive gear 26 Shifter

The explanation given below relates to the on-site general service (field service) but it does not relates to the adjustment and replacement which need high-grade equipment, jigs and skill. For example, the drum assembling, replacement and adjustment service must be performed by the person who have finished the technical courses. Note : There is a function to cut off the high voltage of TV by taking the plug of P1003 off the socket SC1003 in Main PWB in order to check only VCR part including mechanism. So you can use this function in the case of checking and adjusting mechanism. MECHANISM CONFIRMATION ADJUSTMENT JIG So as to perform completely the mechanism adjustment prepare the following special jigs. So as to maintain the initial performance of the machine the maintenance and check are necessary. Utmost care must be taken so that the tape is not damaged. If adjustment needs any jig, be sure to sue the required jig. These Jigs are used for checking and adjusting the reel disk height. This cassette torque meter is used for check- ing and adjusting the torque of take-up for measuring tape back tension. These Jigs are used for checking and adjusting the torque of take-up and supply reel disks. This Jig is used with the tension gauge. Rotary transformer clear- ance adjusting jig. There are two gauges used for the tension measurements, 300 g and 2.0 kg. This Jig is used for height adjustment of the reverse guide (for reverse guide height ad- justment). 625 Monoscope and Color Bar 6kHz and 1kHz 49µm This screwdriver is used for adjusting the guide roller height. For X value adjustment This Jig is used for height adjustment of the reverse guide. VROUBZFS VROCPSV CK No. Jig ltem Part No. Code Configuration Remarks 1. Torque Cassette Meter JiGVHT-063 CZ Torque Gauge 2. 3. Torque Gauge Head JiGTH0006 AW 4. Torque Driver JiGTD1200 CB Master Plane Jig and Reel Disk Height Adjusting Jig 5. JiGMP0001 BY JiGSG2000 BS JiGSG0300 BF Tension Gauge 6. 7. JiGADP003 BK 8. JiGDRiVER11055 AR Alignment Tape 9. 10. JiGDRiVERH-4 AP 11. JiGDRiVER-6 BM 12. JiGRVGH-F18 BU Pinch pressing force measuring jig Reverse guide height adjusting box driver Guide roller height adjustment drive X value adjustment gear type screw driver Reverse Guide Height Adjusting Jig When fixing any part to the threaded hole using resin with screw, use the jig. (Specified torque 5 kg) Video Audio Track 625 Monoscope 6kHz 35µm JiGTG0090 CM JiGTG1200 CN JiGRH0002 BR

Idler Ass’y Guide Roller Ass’y Sup Guide Shaft Retaining Guide Slant Pole on Pole Base Full-erase Head Colour and beating MAINTENANCE CHECK ITEMS AND EXECUTION TIME Perform the maintenance with the regular intervals as follows so as to maintain the quality of machine. Parts Maintained 500 hrs. 1000 hrs. 1500 hrs. 2000 hrs. Remarks Pinch Roller Reel Belt Loading Motor Tension Band Ass’y Screen swaying A/C Head Upper and Lower Drum Ass’y Possible symptom encountered Lateral noises Head occasionally blocked No tape running, uneven colour No tape running, tape slack No tape running, tape slack, no fast forward/ rewind motion Cassette not loaded or unloaded No tape running, tape slack Limiter Pulley Supply/Take-up Main Brake Levers Tape slack Replace the roller of the cleaner when it wears down. Just change the AHC roller assembly for new one. Small sound or sound distortion Poor S/N ratio, no colour Poor flatness of the envelope with alignment tape Clean rubber and rubber contact area with the specified cleaning liquid. Clean tape contact area with the specified cleaning liquid. Clean tape contact part with the specified cleaning liquid. Abnormal rotation or significant vibration requires replacement. AHC (Automatic Head Cleaner) NOTE: : Part replacement. : Cleaning : Apply grease Cleaning liquid: Industrial ethyl alcohol * This mechanism does not need electric adjustment . Check parts. If any deviation is found, clean or replace parts.

float (500g) Note: The weight should not be more than 500g. • To take out the cassette tape. 1. Turn off the power switch. 2. Take out the cassette tape. 1 Notes: 1. When fitting the S/E sensor holder to the cassette controller frame L/R, take care. 2. Misengagement of teeth of casecon drive gear and drive angle gear causes malfunction. (The cassette cannot be set, load and ejection are repeated). 3. In the case when you use the magnet screw driver, never approach the magnet driver to the A/C head, FE head, and drum. 4. When installing or removing, take care so that the cassette housing control and tool do not contact the guide pin or drum. 5. After installing the cassette housing control once perform cassette loading operation. TO RUN A TAPE WITHOUT THE CASSETTE HOUSING CONTROL ASSEMBLY 1. Short-circuit TP7701 (J301) and TP7702 (J302). 2. Plug in the power cord. 3. Turn off the power switch. (The pole bases move into U.L.position.) 4. Open the lid of a cassette tape by hand. 5. Hold the lid with two pieces of vinyl tape. 6. Set the cassette tape in the mechanism chassis. 7. Stabilize the cassette tape with a weight (500g) to prevent floating. 8. Turn on the power switch. 9. Perform running test. 500g REMOVING AND INSTALLING THE CASSETTE HOUSING • Removal 1. In the cassette eject mode remove the cassette. 2. Unplug the power cord. 3. Remove in the following numerical order. a) Remove two screws 1. b) Slide and pull up the cassette housing control. • Reassembly 1. Before installing the cassette housing control, short- circuit TP7701 (J301) and TP7702 (J302) provided at the left of the main PWB, press the eject button. The casecon drive gear turns and stops when the posi- tioning mark appears. Engage two teeth of casecon drive gear with the three teeth of casecon drive angle gear, and set on the mechanism chassis as shown below. 2. Install in the reverse order of removal.

tension band ass'y is not deformed and grease does no adhere. 2. Do not damage the Sup main brake ass'y. Be careful so that grease does not adhere to the brake surface. • Reassembly (Take-up reel disk) 1. Clean the reel disk shaft and apply grease (SC-141) to it. 2. Align the phase of the reel disk to that of the reel relay gear and to install a new take-up reel disk onto the shaft. 3. Check the reel disk height and reassemble the take- up main brake ass'y. Notes: 1. Take care so that the Tu main brake ass'y is not damaged. Take care so that grease does not adhere the brake surface. 2. After reassembly, check the video search rewind back tension (see page 33), and check the brake torque (see page 36). • Height checking and adjustment Notes: 1. Set the master plane with due care so that it does not contact the drum. 2. When putting the master plane, shift the reverse guide a little in the loading direction. Care must be taken since excessive shift results in damage. Figure 1-5. Tension arm ass'y Supply reel disk Take-up reel disk Supply main brake ass'y Take-up main brake ass'y Tension band ass'y Figure 1-4. Note: Check that the reel disk is lower than part A but higher than part B. If the height is not correct, readjust the reel disk height by changing the poly-slider washer under the reel disk. Reverse guide Position pin Cassette lock release shaft Take-up reel disk Figure 1-6. Master plane Supply reel disk REEL DISK REPLACEMENT AND HEIGHT CHECK • Removal 1. Remove the cassette housing control assembly. 2. Pull the tension band out of the tension arm ass'y. 3. Remove the Supply/Take-up main brake ass'y. 4. Open the hook at the top of the reel disk, and remove the reel disk. Note: Take care so that the tension band ass'y and main brake ass'y (especially soft brake) are not deformed. Note: When the tension band ass'y is pressed in the direction of the arrow for removal, the catch is hard to be deformed. • Reassembly (Supply reel disk) 1. Clean the reel disk shaft and apply grease (SC-141) to it. 2. Match the phases of reel disk and reel relay gear, and set the new reel disk. 3. After checking the reel disk height, wind the tension band ass'y around the reel disk, and insert into the hole of tension arm ass'y. 4. Assemble the Sup main brake ass'y.

adjusting jig Mechanism chassis 10 ± 0.2mm Figure 1-8. • Adjustment 1. If the FF winding-up torque is less than the specified value, clean the capstan D.D. motor pulley, reel belt, and limiter pulley with cleaning liquid, and check again. 2. If the torque is less that the set value, replace the reel belt. Torque gauge 30mN·m (306gf·cm) or more The gauge is held at its maximum value. (Red mark) Idler ass'y CW Figure 1-9. Torque gauge 30mN·m (306gf·cm) or more Supply reel disk Idler ass'y The gauge is held at its maximum value. (Red mark) CCW • Adjustment 1. If the rewind winding-up torque is less than the specified value, clean the capstan D.D. motor pulley, drive belt, and limiter pulley with cleaning liquid, rewind again, and check the winding-up torque. 2. If the winding-up torque is still out of range, replace the drive belt. Notes: 1. Hold the torque gauge by hand so that it is not moved. 2. Do not keep the reel disk in lock state. Do not allow long-time measurement. A B Reel disk Reel disk Notes: 1. Hold the torque gauge by hand so that it is not moved. 2. Do not keep the reel disk in lock state. Do not allow long-time measurement. CHECKING AND ADJUSTMENT OF TAKE-UP TORQUE IN REWIND MODE • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Set a torque gauge to zero on the scale. Place it on the supply reel disk. 2. Press the rewind button. 3. To calculate the remaining capacity, slowly rotate the take-up reel disk, and then shift it into the rewind mode. • Checking 1. Turn the torque gauge slowly (one rotation every 2 to 3 seconds) by hand in the CCW direction. 2. Make sure that the indication of torque gauge is not less than 30mN·m (306gf·cm). Note: Whenever replacing the reel disk, perform the height checking and adjustment. CHECKING AND ADJUSTMENT OF TAKE-UP TORQUE IN FAST FORWARD MODE • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Set a torque gauge to zero on the scale. Place it on the take-up reel disk. 2. Press the FF button. 3. To calculate the remaining capacity of the play back mode, slowly rotate the supply reel disk, and then shift it into the forward mode. • Checking 1. Turn the torque gauge slowly (one rotation every 2 to 3 seconds) by hand in the CW direction. 2. Make sure that the indication of torque gauge is not less than 30mN·m (306gf·cm).

If the torque gauge is raised, accurate measurement is impossible. • Adjustment 1. If the rewinding playback winding-up torque is not within the setting, replace the limiter pulley assembly. Note: The winding-up torque fluctuates due to variation of rotation torque of supply reel disk. Read the center value of fluctuation as setting. Set value LP6.9 ± 2.5mN⋅m (70 ± 25gf⋅cm) Cassette torque meter Figure 1-10. Torque gauge Supply reel disk CCW Figure 1-11. CHECKING AND ADJUSTMENT OF TAKE- UP TORQUE IN RECORD/PLAYBACK MODE • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord. • Turn off the power switch. • Open the cassette torque meter lid, and fix it with tape. • Load the cassette torque meter into the unit. • Put the weight (500g) on the cassette torque meter. • Turn on the power switch. • Press the REC button, and set LP picture record mode. 500g • Checking 1. Make sure that value is within the setting 6.9±2.5mN·m (70±25gf·cm). 2. The winding-up torque fluctuates due to variation of rotation torque of limiter pulley ass'y. Read the center value of fluctuation as setting. 3. Set the LP record mode and make sure that the winding-up torque is within setting. • Adjustment 1. If the playback winding-up torque is not within the setting, replace the limiter pulley assembly. Note: When the torque cassette is set, put a weight (500g) to prevent rise. When the cassette torque meter is taken out, turn off the power switch. CHECKING AND ADJUSTMENT OF TAKE- UP TORQUE IN VIDEO SEARCH REWIND MODE • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Press the playback button and rewind button to set the video search rewinding mode. • Checking 1. Place the torque gauge on the supply reel disk, and turn it counterclockwise very slowly (one rotation every 1 to 2 seconds) and check that the torque is within the set value 14.0 ± 3.9mN⋅m. (144 ± 40gf⋅cm)

CCW 4. Gradually return the pinch roller, and measure the pulling force when the pinch roller contacts the cap- stan shaft. 5. Make sure that the measured value is within setting 8.8 to 11.8 N (900 to 1,200gf). CHECKING AND ADJUSTMENT OF TENSION POLE POSITION • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord. • Setting 1. Turn off the power switch. 2. Open the cassette tape (E-180), and fix with tape. 3. Set the cassette tape in loading state. 4. Put the weight (500g) on the cassette tape. 5. Turn on the power switch. 6. Make the adjustment with the beginning of a E-180 tape. (E-180) Weight to prevent float (500g) CHECKING THE VIDEO SEARCH REWIND BACK TENSION • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Checking 1. After pressing the play button, press the rewind button, and set the video search rewind mode. 2. Place the torque gauge on the take-up reel disk, and turn it counterclockwise very slowly (one rotation every 2 to 3 seconds) and check that the torque is within the set value 3.4±1.5mN⋅m (35±15gf⋅cm). Note: Set the torque gauge securely on the take-up reel disk. If it is not secure, the measurement will be incorrect. CHECKING THE PINCH ROLLER PRESSURE • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Checking 1. Press the play button to set the playback mode. 2. Detach the pinch roller from the capstan shaft. Do not separate excessively. Or the pinch lever and pinch double action lever may disengage. 3. Engage the tension gauge adapter with the pinch roller shaft, and pull in the arrow direction. Tension gauge 8.8 –11.8N (900 ~ 1,200gf) Pinch roller Capstan shaft Tension gauge adapter Figure 1-13. 500g Figure 1-14.

Figure 1-18. Figure 1-17. At left side from the center line Figure 1-15. Figure 1-16. • Checking 1. Set a cassette tape, push the REC button to place the unit in the SP record mode. Now check the tension pole position. 2. Visually check to see if the right edge of the tension pole is within the 1.5 ± 0.25mm from the right edge of the Sup guide shaft. Insert the slotted screwdriver in the tension pole ad- juster, and rotate counterclockwise. At right side from the center line Insert the slotted screwdriver in the tension pole ad- juster, and rotate clockwise. Tension pole adjuster adjusting range Adjust so that the delta mark of tension pole adjuster is within 90° range (left, right). CHECKING AND ADJUSTMENT OF RECORD/PLAYBACK BACK TENSION • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord. • Setting 1. Turn off the power switch. 2. Open the torque cassette meter and fix with tape. 3. Set the cassette tape in loading state. 4. Put the weight (500g) on the cassette torque meter. 5. Turn on the power switch. • Checking 1. Push the REC button to place the unit in the SP record mode. 2. At this time ascertain that the back tension is within the setting (36.5 to 52g·cm) by seeing the indication of torque cassette meter. Make the adjustment with the beginning of a E-180 tape. 1.5 – 0.25mm Supply guide shaft Tension pole 1.5 – 0.25mm 1.5 – 0.25mm 90° 90° 500g Cassette torque meter Weight to prevent float (500g) Figure 1-19.

• After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Switch from the FF mode to the STOP mode. 2. Disconnect the power cord. 3. Set a torque gauge to zero on the scale. Place it on the take-up reel disk. • Checking 1. Turn the torque gauge at a rate of about one turn/2 sec in the CCW direction/CW direction so that the reel disk and torque gauge pointer rotates at equal speed and make sure that the value is within the setting (CCW direction: 8.8 to 23.5mN·m (90 to 240gf·cm), CW direction: 4.9 to 11.8mN·m (50 to 120gf·cm). 2. Adjustment of the brake torque at the supply side and the take-up side • Unless the supply side brake torque or take-up side brake torque is within the setting, clean the felt surface of reel disk (supply, take-up) brake lever, check again the brake torque. • If value cannot be set within the setting yet, replace the main brake ass'y or main brake spring. Take-up reel disk Figure 1-20. A B • Adjustment 1. If the indication of torque cassette meter is lower than the setting, shift the tension spring engagement to the part A. 2. If the indication of torque cassette meter is higher than the setting, shift the tension spring engagement to the part B. CHECKING THE BRAKE TORQUE • Checking the brake torque at the supply side • Checking the brake torque at the take-up side Tension spring Tension arm CCW: 3.9~9.8mN⋅m (40~100gf⋅cm) CW: 8.8~23.5mN⋅m (90~240gf⋅cm) Torque gauge CCW Supply reel disk CW Figure 1-21. • Remove the cassette housing control assembly. • After short-circuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Set a torque gauge to zero on the scale. Place it on the supply reel disk. 2. Switch from the FF mode to the STOP mode. 3. Disconnect the power cord. • Checking Turn the torque gauge at a rate of about one turn/2 sec in the CW direction/CCW direction with respect to the supply reel disk so that the reel disk and torque gauge pointer rotate at equal speed, and make sure that the value is within the setting (CW direction: 8.8 to 23.5mN·m (90 to 240gf·cm); CCW direction: 3.9 to 9.8mN·m (40 to 100gf·cm). CCW CW Torque gauge

punched mark of chassis, tentatively tighten the screws 1 and 2 so as to ensure smooth motion of A/C head plate. Tentative tightening torque must be 0.15 to 0.20 N·m (1.5 to 2.0kgf·cm). Height screw Figure 1-23. Figure 1-24. Figure 1-25. 3 Azimuth screw 1 2 Spring Tilt screw New A/C head ass'y ∗Never touch the head A/C head base A/C head PWB Solder 10.8mm 10.8mm Left end of A/C head plate gear Punched line mark on chassis Height screw 1 3 2 Notes: 1. If the screws 1 and 2 are tighten tentatively too loose, the azimuth and height of A/C head may change when they are finally tightened. Therefore care must be taken. 2. After completion of A/C head be sure to adjust tape running. (Execute the running adjustment by the method described in Pages 38 and 39.) • Replacement 1. Solder the removed PWB to the new head assembly. 2. Adjust the height from the A/C head plate (lower surface) to the A/C head base to 10.8mm with slide calipers. (3 places of azimuth screw section, tilt screw section and height screw section)(See the figure below.) REPLACEMENT OF A/C (Audio/Control) HEAD 1. Remove the cassette housing control assembly. 2. In unloading state unplug the power cord. • Removal 1. Remove the screws 123, Azimuth screw and Tilt screw. 2. Unsolder the PWB fitted to the A/C head Notes: 1. When replacing, never touch the head. If you touched, clean with the cleaning liquid. 2. When removing the screw 3, take care so that the spring may spring out.

is visible 0.3mm below the bottom of the tape. Figure 1-27. ✽ Check for crease from the A direction. Figure 1-30. 3. Set the tape, and check for tape crease near the reverse guide in the playback mode. If crease is found, turn the reverse guide adjustment nut to remove crease. (As for crease check refer to Figure 1-30.) A/C HEAD HEIGHT ROUGH ADJUSTMENT • Setting 1. Set the cassette tape in the unit. 2. Press the PLAY button to put the unit in the playback mode. 3. Roughly adjust the height of the A/C head by turning the height screw until the tape is in the position shown below. HEIGHT ADJUSTMENT OF REVERSE GUIDE 1. Adjust the height from the mechanism chassis to the reverse guide lower flange to 13.38 mm, using the reverse guide height adjustment jig, in tape loading state. (Refer to Figure 1-28 (a) (b).) 2. Rotate counterclockwise the reverse guide height adjustment nut 1/10 turn. (For height adjustment use the reverse guide height adjustment box driver (JiGDRiVER 11055)). 500g Azimuth screw Tilt screw Height screw Cassette tape Weight to prevent float (500g) Mechanism chassis A/C head Tape 0.3mm Reverse guide Reverse guide height adjusting jig Reverse guide height adjusting jig Mechanism chassis 13.38mm Height adjusting nut Box driver CCW 500g A Capstan motor shaft An example of crease near the reverse guide Weight to prevent float (500g) Mechanism chassis Reverse guide Fixing guide

1. Tape run rough adjustment 1 Remove the cassette housing control assembly. 2 After shortcircuiting TP7701 (J301) and TP7702 (J302) provided at the left on the main PWB, plug in the power cord, then turn on the power. 3 Check and adjust the position of the tension pole. (See page 33.) 4 Check and adjust the video search rewind back tension. (See page 33.) 5 Connect the oscilloscope to the test point for PB CHROMA envelope output (TP3301). Set the synchronism of the oscilloscope to EXT. The PB CHROMA signal is to be triggered by the head switching pulse (TP3302). 6 After turnning off the power, set the alignment tape (VROCPSV) then turn on the power and playback the tape. (Put a 500g weight on the cassette tape to prevent lift of cassette tape.) 7 Press the tracking button (+), (–) and change the envelope waveform from max to min and from min to max. At this time make sure that the envelope waveform changes nearly parallel. 8 Unless the envelope waveform changes nearly parallel, adjust the height of supply side and take- up side guide roller so that the envelope wave- form changes nearly parallel. (For envelop ad- justment procedure refer to Figure 1-35.) 9 Turn the tilt screw to remove the tape crease at the fixing guide flange. Play back the tape and check for tape crease at the fixing guide flange. (1) If there is no tape crease Turn the tilt screw clockwise so that tape crease appears once at the flange, and then return the tilt screw so that the crease disap- pears. (2) If there is tape crease Turn counterclockwise the tilt screw so that the tape crease disappears. (Reference) If the tilt screw is turned clockwise crease appears at the lower flange. Notes: 1. Previously set the tracking control in the center posi- tion, and adjust the envelop waveform to maximum with X value adjustment nut. Thereby the tape run rough adjustment is facilitated. 2. Especially the outlet side envelope waveform must have higher flatness. Figure 1-31. Guide roller Cassette Tape 500g Weight of 500g 2. Adjustment of A/C head height and azimuth 1 Perform the initial setting of A/C head position by the method stated in "Page 37 Replacement -3.". 2 Connect the oscilloscope to the audio output (TP6601). 3 Using the alignment tape in which 1 kHz linear audio signal has been recorded, adjust the height screw so as to get max audio output. 4 Using the alignment tape in which 6 kHz linear audio signal has been recorded, adjust the azi- muth screw so as to get max audio output. 5 The adjustment of 3 and 4 twice or three times repeat, and finally adjust 4. Figure 1-33. 3. Tape run adjustment 1 Connect the oscilloscope to PB CHROMA enve- lope output test point (TP3301), set oscilloscope sync to EXT, trigger-input the head switching pulse (TP3302). 2 Rough adjustment of X value Tentatively fix A/C head arm screws 1 and 2 by the method described in Page 36 "Replacement -3.". After shortcircuiting TP7701 (J301) and TP7702 (J302), plug in the power cord, turn off the power, set the alignment tape (VROCPSV), turn on the power and then playback the tape. As a result the auto-tracking is automatically cancelled, so that the X value adjustment mode is set. Move the A/C head with the X value adjustment gear driver (JiGDRiVER-6) by the method shown in Figure 1-33, and adjust the A/C head so as to get the maximum envelope waveform. (Note: When the A/C head is adjusted, adjust so that the maximum envelop waveform is obtained nearest the position of initial setting made in Page 37.) 3 When the VROUBZFS tape is used, press the tracking button (+), (–) and change the envelope waveform from max to min and from min to max. At this time adjust the height of supply and take- up side guide roller with the adjustment driver (JiGDRiVERH-4) so that the envelope waveform changes nearly parallel. For X value adjustment Adjust the X value, turning the gear- type screwdriver.

When the tape is below the helicallead. Supply side Take-up side Supply side Take-up side Adjustment Supply side guide roller rotated in clockwise direction (lowers guide roller) to flatten envelope. Take-up side guide roller rotated in clockwise direction (lowers guide roller) to flatten envelope. Supply side guide roller rotated in counterclock- wise direction (raises guide roller) to make the tape float above the helical lead. The supply side guide roller is then rotated in the clockwise direction to flatten the envelope. Take-up side guide roller rotated in counterclock- wise direction (raises guide roller) to make the tape float above the helical lead. The take-up side guide roller is then rotated in the clockwise direction to flatten the envelope. PB CHROMA Envelope Head switching pulse Figure 1-35. 4 If the tape is lifted or sunk from the helical lead surface, the PB CHROMA envelope waveform appears as shown in Figure 1-35. 5 Press the tracking button (+), (–) and make sure that the envelope waveform changes nearly par- allel. 6 Finally check tape crease near the reverse guide. If tape crease is found, remove it as stated in Page 37"HEIGHT ADJUSTMENT OF REVERSE GUIDE" item 3. CH-1 CH-2 Figure 1-34. 4. A/C head X value adjustment 1 Tentatively fix A/C head arm screws 1 and 2 by the method described in Page 36"Replacement -3.". 2 After shortcircuiting TP7701 (J301) and TP7702 (J302), plug in the power cord, turn off the power, set the alignment tape (VROUBZFS), turn on the power and then playback the tape. As a result the auto-tracking is automatically cancelled, so that the X value adjustment mode is set. 3 Move the A/C head with the X value adjustment gear driver by the method shown in Figure 1-33, and adjust the A/C head so as to get the maximum envelope waveform. (Note: At this time adjust so as to get the maximum envelope waveform near- est the A/C head position which has been set in case of X value rough adjustment as stated in Page 38, 3-2). 4 Tighten finally the screws 1 and 2. Be sure to tighten at first the screw 1 and then the screw 2. Final tightening torque is 0.6N·m (If the screw 2 is tightened first, the X value may deviate.) 5 Adjust the playback switching point (Refer to the electric adjustment method.) 6 Playback the self-picture-recorded tape, and check the flatness of envelope waveform and sound. Note: When the A/C head X value adjustment is performed, be sure to perform at first X value rough adjustment (refer to Page 38, 3-2). Figure 1-36. 2 1

1. Set the eject mode. 2. Withdraw the main power plug from the socket. • Removal (Perform in numerical order.) 1. Disconnect the FFC cable 1. 2. Unscrew the D.D. stator assembly fixing screws 2. 3. Take out the D.D. stator assembly 3. 4. Unscrew the D.D. rotor assembly fixing screws 4. 5. Take out the D.D. rotor assembly 5. Notes: 1. In removing the D.D. stator assembly, part of the drum earth spring pops out of the pre-load collar. Be careful not to lose it. 2. Install, so that the D.D. rotor ass'y and upper drum ass'y mounting direction check holes align. (Align the upper drum dent with the rotor hole.) 3. Be careful not to damage the upper drum or the video head. 4. Protect the hole elements from shock due to contact with D.D. stator or D.D. rotor ass'y. 5. After installation adjust the playback switching point for adjustment of servo circuit. Figure 1-38. REPLACEMENT OF THE CAPSTAN D.D. (DIRECT DRIVE) MOTOR • Remove the mechanism from the main PWB (refer to "7. Remove the 4 mechanism chassis fixing screws, and detach the mechanism chassis from the Main PWB" on page 7.). • Removal (Follow the order of indicated num- bers.) 1. Remove the reel belt 1. 2. Remove the three screws 2. Figure 1-37. • Reassembly 1. Taking care so that the capstan shaft does not contact the mechanism chassis, set its position on the mechanism chassis, and then install with the three screws. 2. Install the reel belt. Notes: 1. After installing the capstan D.D. motor, be sure to rotate the capstan D.D. motor and check the move- ment. 2. Set the tape, and check for the tape crease near the reverse guide in the playback mode. Adjust the A/C head and azimuth as stated in Page 38 item 2. If crease is found, adjust as stated in Page 37 "HEIGHT ADJUSTMENT OF REVERSE GUIDE". Capstan D.D. motor control PWB Capstan D.D. motor 1 Reel belt 1 4 4 5 3 2 Upper drum D.D. rotor ass’y D.D. stator ass’y 2

DRUM ASSEMBLY • Replacement (Perform in the numerical order) 1 Remove the motor as stated in Page 40 D.D. motor replacement. 2 Remove the drum earth brush 2. 3 Remove the drum base 3 from the upper and lower drum assembly 1. [Cares when replacing the drum] 1. Be careful so that the drum earth brush is not lost. 2. Do not touch directly the drum surface. 3. Fit gently the screwdriver to the screws. 4. Since the drum assembly is an extremely precise assembly, it must be handled with utmost care. 5. Make sure that the drum surface is free from dust, dirt and foreign substances. 6. After replacing the drum be sure to perform the tape running adjustment. After that, perform also the electrical adjustment. • Playback switching point adjustment • X-position adjustment and check 7. After replacing the drum clean the drum. Figure 1-39. Figure 1-40. ASSEMBLING OF PHASE MATCHING MECHANISM COMPONENTS • Assemble the phase matching mechanism com- ponents in the following order. 1. Assemble the pinch roller assembly and pinch drive cam. 2. Mounting the shifter (on the back of the mechanism chassis). 3. Mounting the master cam (on the back of the mecha- nism chassis). 4. Assemble the connection gear, slow brake and load- ing motor parts. • Pinch drive cam and pinch roller assembling method. (Place the following parts in position in numeri- cal order.) (1)Reverse drive lever 1 (2)Reverse guide spring 2 (3)Reverse guide lever ass’y 3 (4)Reverse guide height adjusting nut 4 (5)Pinch drive cam 5 (6)Pinch roller ass’y 6 (7)Open lever 7 2 1 3 7 6 4 3 2 1 5

Figure 1-41-1. Figure 1-41-2. Figure 1-41-3. Insert reverse guide lever ass'y Align here. 2 Insert pinch drive cam Pinch drive lever ass'y 2Insert Pinch Roller/Pinch Double Action Lever Ass’y. Pinch Roller Double Action Lever Ass'y Phase Matching Point 2 Fit the pinch drive cam so that the notch of pinch drive cam aligns with the dent of pinch drive lever assembly. Fit the pinch drive cam so that the notch of pinch drive lever assembly aligns with the half-round notch of chassis. Turn the reverse guide lever assembly counterclockwise to the stopper. 3Insert Open Lever. Open lever

1. Make sure that the loading gear is at the phase- matching point 1 as shown below. 2. Install, paying attention to 5 insertion points and 3 release points. 3. For the phase matching at the insertion point 1, see the phase-matching point 2 as shown below. 4. Finally fix the inserts 1 and 4. Figure 1-43. INSTALLING THE SHIFTER Capstan D.D. motor Drum Reel pulley Figure 1-42. Phase-Matching point 2 Loading gear(T) Half round notch Round mark Insert point 1 Shaft 1 Sifter Insert point 3 Insert point 2 Insert point 4 Insert point 5 Rotation point 2 Release point 3 Phase-matching point 1 Shaft 2 Shaft 1 Shaft 1

• Removal Figure 1-46. No grease Figure 1-45. +0.2 –0.2 Figure 1-44-2. When installing the master cam, align the casecon drive gear round mark with the half-round notch of master cam. Figure 1-44-1. Half-round notch INSTALLING THE MASTER CAM (AT REAR SIDE OF MECHANISM CHASSIS) 1. Make sure beforehand that the shifter is at the point as shown below. 2. Place the master cam in the position as shown below. E ring (XRESJ30-06000) Master cam Fully turn clockwise Fully turn counterclockwise Face the wide tooth side ward Note: See the figure below for the phase matching between the master cam and the casecon drive gear. 3. Finally fix with the E ring. Master cam Casecon drive gear Round mark The loading motor pressing-in must be less than 14.7 N (15 gf). Adjust the distance between motor and pulley to 10.2 mm). • Replacement 1. Remove the loading motor, and install the replace- ment loading motor as shown below. Apply grease Apply grease 10.2 mm +0 —0.2

ASSEMBLY OF CASSETTE HOUSING 1. Drive Gear and R Drive angle ass’y MSPRT0381AJFJ Apply grease Apply grease Apply grease LANGF9592AJFW Top surface should be free from scratches or soil. Drive angle Drive gear R Frame

SERVO CIRCUIT ADJUSTMENT ADJUSTMENT OF HEAD SWITCH- ING POINT Figure 2-1. Measuring Dual trace oscilloscope instrument Mode Playback Cassette Alignment tape(VROUBZFS) Test point TP2201 (Video Out) to CH1 TP3302 (Trigger) to CH2 Control Remote Control Specification 5.5 ± 0.5H (lines) 1. Put the set in the SERVICE mode by turning the power on with the STAND BY/POWER button while the CH ' button on the front pannel is being pressed down more than 3 seconds. 2. Play the alignment tape (VROUBZFS), then press the PROG button on the remote control to turn the set into the adjustment mode for the head switching point. "TEST" is displayed on the screen, in the playback mode it means the set is in the adjusting mode for the head switching point. 3. Connect a dual trace oscilloscope to the test points TP2201 (Video out) and TP3302. (Trigger the oscilloscope with the head switching pulse on TP3302.) 4. Press the PLAY button of remote control to make the adjustment of the head switching point, then the leading edge of the head switching pulse is automatically set 5.5H (line) ahead of the vertical sync as shown in Figure 2-1 and the adjustment data is memorized in the E2P-ROM IC. 5. Then press the STOP button to stop the tape, and turn the power off to cancel the SERVICE mode. Notes: » Before the adjustment: Electrical adjustments described here are often required after replacement of electronic components and mechanical parts such as video heads. Check that the mechanism and all electric components are in good working condition prior to the adjustments, otherwise adjustments can not be completed. » Instruments required: Dual trace oscilloscope Blank video cassette tape Colour bar generator Alignment tape (VROUBZFS) » Adjustment of the VCR should be done in the TV/VCR combinated style. But there is a function the able to cut off high voltage of TV. Namely, you can check only VCR part by taking the plug of P1003 off the socket SC1003 in Main PWB (PWB-A). Therefore you can use this function on the occasion of checking and adjustment of VCR part. Notes: 1 Data of this adjustment is memorized to the E2P-ROM IC on the main PWB when the head switching point is automatically adjusted. 2 In order to set the unit in the adjusting mode for the head switching point, pressing the PROG button is needed at the playback in the SERVICE mode. 5.5±0.5H(Iines) V-sync. CH-2 HEAD SWITCHING PULSE CH-1 VIDEO OUT CH-1: 1V/div 50µsec/div CH-2: 2V/div 50µsec/div

Adjustment of PAL System LP still picture vertical sync Measuring Monitor TV instrument Mode Still picture playback Input signal PAL LP self-recording tape Test point Monitor screen Adjusting point CH L / M (TR ±/ — ) buttons. Specification No Vertical jitter. 1. Playback the LP Self-recorded tape in the PAL System still mode. 2. Using the CH L / M (TR ±/ —) buttons on the remote control, make adjustment so that jitter becomes minimum. 3. Now press the STOP button to stop the tape. Adjustment of NTSC System EP still picture vertical sync Measuring Monitor TV instrument Mode Still picture playback Input signal NTSC EP self-recording tape Test point Monitor screen Adjusting point CH L / M (TR ±/ — ) buttons. Specification No Vertical jitter. 1. Playback the EP Self-recorded tape in the NTSC System still mode. 2. Using the CH L / M (TR ±/ —) buttons on the remote control, make adjustment so that jitter becomes minimum. 3. Now press the STOP button to stop the tape. Figure 2-2. MAIN UNIT PWB-A

0 5 10 15 20 25 G mechanical timing Mode check Cam mark Mode detection outside (CAM SW B D7704) Mode detection inside (CAM SW A D7705) Cam graph E 60 120 180 240 300 360 CA/END CS/EJ 19.812° UL 81 VSR 233 PU1 179 PU2 200 PB 265 SLOW 282 FF 316 STOP 334 Cam switch 0 Mode detection outside Mode detection inside S sensor S sensor Mode detection inside CAM SW A Mode detection outside CAM SW B CS/EJ ULD PU1 PU2 VSR PB SLOW FF STOP 1 1 1 0 0 0 0 0 0 0 1 1 1 1 0 1 1 0 open close 0 1 EJ UL FF PU PU2 0 1 1 0 1 1 0 0 0 0 0 1 0 0 1 0 0 1 or 0 1 1 1 1 1 0 1 0 0 1 0 0 0 0 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 0 0 0 0 1 1 1 1 1 VSR PB SLW STP 10.354° 12.812° Loading motor turns in reverse direction and master cam counterclockwise. CASSETTE INSERTION STOP Cassette inserting Full- loading YES YES YES NO NO NO Unloading Loading motor starts in normal direction and master cam counter clockwise. Does mechanism position SW. come off within 2.5 sec.? Are start/end sensors at low level before cassette insertion ? Insert cassette. Double action rack slides. Drum motor starts. Tape loading. Pinch roller comes into contact. Cam switch is at PB position. Loading motor stops. Is drum PG pulse output ? End End Cassette is ejected and loading motor stops. Start sensor close. (Cassette is judged caught halfway.) (Cassette LED or some other part is judged defective.) MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE

counterclockwise. Is take-up reel sensor signal outputted ? End Press REC/PLAY button. Picture appears at PB. Unloading Set capstan motor to search speed. End Press FF button. PLAY VSF REC/PLAY STOP Capstan motor turns in reverse direction. Loading motor turns in counterclockwise direction and master cam turns clockwise. Slow brake comes into contact with capstan motor. Slow brake pressing Cam switch is at STILL position. End Capstan motor stops. Press STOP button. Loading motor stops. End Capstan motor stops. NO YES Press STILL button. Pinch roller releasing Idler swinging Pinch roller pressing Loading motor turns clockwise and master cam turns counterclockwise. Capstan motor in turns reverse direction. Loading motor turns counterclockwise. Cam switch is at VSR position. Set capstan motor to search speed. Is supply reel sensor signal outputted ? Press REW button. Release pinch roller. Cam switch is at PU2 position. Cam switch is at PU1 position. Loading motor stops. Press pinch roller. Loading motor turns clockwise. Release the supply auxiliary brake. Loading motor stops. End Unloading Cam switch is at PB position. End Press PLAY button. Loading motor turns counter- clockwise and master cam turns clockwise. Capstan motor turns counterclockwise. PB speed. NO YES

FF/REW STOP NO NO FF/REW operation Brake function Capstan motor turns normal or reverse direction, after the remaining tape has been detected. Loading motor turns counter- clockwise. Cam switcn is at Stop position. End Press STOP button. Press FF/REW button. Capstan motor stops. Loading motor stops. End Loading motor turns in clockwise and master cam turns counterclockwise. Does 4 supply reel pulses output ? Does the take-up reel pulse output two edges? Capstan motor turns clockwise. Loading motor turns clockwise. Cam switch is at Eject position. Loading motor stops. Capstan motor stops. Press EJECT button. Tape unloading Cassette eject End Capstan motor turns clockwise. Capstan motor turns counterclockwise in about 2 seconds. Loading motor stops. Capstan motor turns in reverse direction. Cam switch is at UL position. YES YES

Press FF button. NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Is master cam at FF position ? Does loading motor operate? Modes changing smoothly through cam switch ? Loading motor control system in trouble. Are 12V and 5V supplied ? Replace the capstan motor. Replace the idler wheel ass y. Replace the reel sensor. Loading motor is damaged. Replace it. Voltage supply system in trouble. Mode sensor (CAM SW A and B) system in trouble or master cam malpositioned. Voltage supply system in trouble. Does capstan motor turn in FF (or REW) direction ? Are idler wheel ass y and reel disk in mesh ? Does the pulse output from reel sensor ? The cassette tape is presumably damaged. 2. REC/PLAY FAILURE (MODE RELEASE) NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Is the master cam at PB position ? Does loading motor operate ? Modes changing smoothly through cam switch ? Mode sensor (CAM SW A and B) system in trouble or master cam malpositioned. Loading motor control system in trouble. Are 12V and 5V supplied ? Replace the capstan motor. Replace the idler ass y. Replace the reel sensor. Loading motor is damaged. Replace it. Voltage supply system in trouble. Voltage supply system in trouble. Does capstan motor turn ? Are idler wheel ass’y and reel disk in mesh ? Is the pulse outputted from reel sensor ? Check main PWB. Does voltage supply at loading motor ? Is voltage applied to loading motor ?

3. WINDING FAILURE AT VSR 4. UNUSUAL SOUND IN EACH MODE Is Playback function normal ? Does master cam shift to VSR position ? Go to 2. REC/ PLAY FAILURE routine. Replace idler gear ass y. Replace limiter pulley ass y. Replace reel sensor. Go to 2. REC/ PLAY FAILURE routine. Are idler wheel ass y and supply reel disk in mesh ? Is supply reel disk winding torque normal ? Does pulse output from reel sensor? Check main PWB. YES YES YES YES YES NO NO NO NO NO YES YES NO NO YES Press REW button. 4-i) Unusual sound in cassette insertion and ejection mode Is unusual sound heard during cassette control running ? Is unusual sound heard with pinch roller lever going up or down ? Is unusual sound heard during loading/unloading ? Check pinch roller drive cam, pinch roller drive lever or reverse guide for their actions. Replace damaged one with new one. Replace cassette control ass y.

4-ii) Unusual sound in FF/REW mode Is reel disk height as specified ? Is drive system out of contact with any part on main PWB ? Turn capstan motor by hand. Is unusual sound heard ? Check drive system’s gears for damage. Replace damaged gear with new one. • Reel disk • Limiter pulley ass’y • Idler wheel ass’y Check reel disk and main chassis. And replace defective parts. Adjust reel disk height. Rearrange the parts on main PWB. Are there thrust gap found at reel disk ?

FLOWCHART NO. 1-2 FLOWCHART NO. 1-3 VCR POWER TROUBLESHOOTING The VCR is dead. (No power) ELECTRICAL TROUBLESHOOTING Un plug the AC power cord. Replug it a few minutes later. Is the fuse F1701 alright in the TUNER/DEF. PWB ? Are the UR 12V and UR 8.5V lines normal in the MAIN PWB ? Is the AT 5V line normal ? Are the AT 5V and GND lines properly connected with IC7701 ? Is there oscillation at pins (38) and (39) of IC7701 ? Does pin (43) of IC7701 change from "L" to "H" level after the AC cord is plugged in or/when the RESET button is pressed and then released ? Does pin (21) of IC7701 change from "L" to "H" level when the power button is pressed to turn the power on ? Is the PC 5V line normal? Check wire harness to mechanism and the sensor inputs to IC7701 from mechanism. (CAM Switches, start/end and reel sensors) Replace the fuse. Check short in the MAIN PWB. Check fuse resistor and transistor trouble of the power circuit in the power PWB. Check the AT 5V line, Q780 and D785. Replace the fuse. Check poor soldering. Check / Replace IC7701 and / or X7701. Check the signal line of sys-con reset all the way up to pin (60) of IC1001. Check power key input to IC1001 and serial datas/clocks between IC1001 and IC7701. Check Q781 and IC780 of PC9V line. Is the PC 5V line normal ? CASSETTE CONTROL TROUBLESHOOTING A cassette tape is not taken in. Is the cassette housing distored ? Does the start sensor cover become open when the cassette tape is inserted ? Does the start sensor pin (2) of IC7701 go to "L" level when the cassette tape is inserted ? Does pin (5) of IC7702 go to "H" level (about 1.8V) when the cassete tape is inserted ? Does pin (2) of IC7702 go to about 11V when the cassette tape is inserted ? Is the correct voltage at the loading motor terminal when the cassette tape is inserted ? Check and replace the loading motor . Fix or replace the cassette housing. Check the start sensor cover. Check the start sensor and the way up to pin (2) of IC 7701. Check pin (12) of IC7701 and all the way up to pin (5) of IC7702. Check IC7702 and UR12V line. Check between IC7702 and the loading motor. A cassette tape is taken in, but ejected at once. Does start sensor pulse at pin (2) of IC7701 change from "L" to "H" level when the cassette tape is loaded ? Does end sensor pulse at pin (3) of IC7701 change from "L" to "H" level when the cassette tape is loaded ? Do the cam switches A and B operate normally when the cassette tape is loaded ? (at pins (100) and (1))(refer to MECHANISM flowchart) Replace IC7701. Check the start sensor and all the way up to IC7701. Check the end sensor and all the way up to IC7701. Check cam switches and all the way up to IC7701. YES NO NO NO NO NO NO NO NO

FLOWCHART NO. 1-5 LOADING MOTOR AND EJECT TROUBLESHOOTING A cassette tape fails to eject. Does the capstan motor start when the EJECT button is pressed ? Check peripheral circuit for poor soldering and wire harness to mechanism or the sensor input to IC7701 from mechanism. Check the reel disk and reel drive unit. See FLOWCART NO. 1-6 NO Is about 11V at pin (10) of IC7702 ? Check IC7702 and "L" level of pin (5) of it. Check IC7701. Check Q781 and IC780(PC9V GEN.). SYSTEM CONTROL TROUBLESHOOTING No power. Does the take-up reel disk turn when the capstan motor is running ? YES NO Check IC1001 and IC7701. NO NO NO NO Check the take up reel sensor and all the way to IC7701. YES NO Check between pin (6) of IC7702 and all the way up to pin (11) of IC7702. Is reel pluse at pin (80) of IC7701 when the take-up reel disk is turning ? YES NO Is the correct voltage at the loading motor terminal ? Check between IC7702 and all the way up to the loading motor. YES NO Does the loading motor run ? Replace the cassette cam, gear, etc. Replace the loading motor. YES YES Is "H" level (about 1.8V) at pin (6) of IC7702 when reel pulse is inputted ? Is the PC 5V line normal ? Are serial clock pulse and TV data pulse applied to pins (66) and (67) of IC7701 from IC1001 ? YES Are system control data pulse and system control ready pulse applied to pins (18) and (17) of IC1001 from IC7701 ? YES YES YES Does power control (H) signal at pin (21) of IC7701 change from "L" to "H" level when power key is pressed ?

The capstan motor fails to run. FLOWCHART NO. 1-7 TAKE-UP REEL PULSE GENERATOR TROUBLESHOOTING No reel sensor pulse appears. Is 5V at pin (8) of connector AC ? Check the AT5V line. NO Is 8V, 12V or 23V at pin (5) of connector AC ? Check 8V, 12V and/or 23V lines. NO Check between the connector AC and pin (77) of IC7701, and between the connector AC and pin (75) of IC7701. YES NO YES Check pin (74) of IC7701. Is the voltage more than about 2.6V given to pin (4) of connector AC ? YES Check/replace the capstan motor. YES Is the voltage at pin (3) of connector AC 1.6~2.7V ? Insert the cassette, and put the unit in FF or REW mode. NO Are there the take up/supply reel pulses at the collectors of D7702/D7703 ? Check between D7702 and pin (80) of IC7701, between D7703 and pin (79) of IC7701. Check/Replace the take up/supply reel sensors D7702/D7703. 4.2V 0 4.4V 0 D-PG D-FG about 4.6V FLOWCHART NO. 1-8 HEAD SWITCHING PULSE TROUBLESHOOTING No head switching pulse. NO YES YES YES Is the drum motor rotating ? Are the drum PG and drum FG signal inputted to pins (86) and (87) of IC7701, respectively ? NO Are there the drum PG and drum FG signals at pins (3) and (5) of connector AD ? Check pin (18) of IC7701 and signal line of head switching pulse. NO See FLOW CHART NO. 1-9. Check PG/FG signal lines all the way up to pins (86) and (87) of IC7701. Check the harness AD- ME and the drum motor unit.

DRUM MOTOR TROUBLESHOOTING The drum motor fails to run. Is the voltage more than about 2.6V applied at pin (7) of connector AD ? Check the AT5V line. Is 5V at pin (1) of connector AD ? NO Check the AT12V line. Is 12V at pin (4) of connector AD ? Check the connection between connectors AD and ME or Check/replace the drum motor. Check between the connector AD and pin (78) of IC7701, and between the connector AD and pin (76) of IC7701. NO YES YES YES NO FLOWCHART NO. 1-10 The drum motor runs only for a few seconds. Is drum PG signal at pin (3) of AD connector ? Check between the connector AD and all the way up to pin (86) of IC7701. Is drum PG signal at pin (86) of IC7701 ? NO Check/replace IC7701. Is H. SW. pulse at pin (18) of IC7701 ? Check pin (76) of IC7701. Check the drum motor.

DRUM SERVO TROUBLESHOOTING Drum servo does not function. Is there 16MHz oscillation at pins (38) and (39) of IC7701 ? Is there the durm PG signal at pin (86) of IC7701 ? Is there the reference signal (V-sync.) at pin (84) of IC7701 ? Is there the head switching pulse at pin (18) of IC7701 ? In REC mode In PB mode Is there the drum control output at pin (78) of IC7701 ? Is there the durm FG signal at pin (87) of IC7701 ? Check FG and PG signal at pins (3) and (5) of the connector ME and the drum motor. Check the signal line of drum PG. Is there the drum control voltage applied to pin (7) of connector AD ? Check the composite sync. signal at pin (14) of IC2201, Q2201, Q2202 and Q7706 all the way up to pin (84) of IC7701. Check the signal line between pin (7) of AD and pin (78) of IC7701. Check and replace the drum motor. See FLOWCHART NO. 1-8. NO NO NO NO NO NO NO Replace IC7701. Check X7701, C7705 and C7706. Replace IC7701. Is pin (76) of IC7701 in high impedance ?

CAPSTAN SERVO TROUBLESHOOTING Capstan servo does not function. Is there 16MHz oscillation at pins (38) and (39) of IC7701 ? Are REC and/or PB mode inoperative ? Does CTL amplifier circuit of IC7701 (pins (92) to (97)) operate normally ? (Does the noise appear at pin (97) when touch R7774 by hand ?) Does PB CTL signal appear at pin (97) of IC7701 ? YES Check " A ". Replace IC7701. Check " B ". In case of NO GOOD Replace the capstan motor. Is the FFC AA-MH normal ? YES Does the A/C head operate normally ? YES Adjust the height of the A/C head. YES YES Does there appear the capstan FG signal at pin (85) of IC7701 ? NO YES Check the capstan FG signal line between AC connector and IC7701. Is there capstan control signal at pin (77) of IC7701 ? YES YES Does there appear the V- sync. at pin (84) at IC7701 ? Is there REC CTL signal output at pins (91), (92) of IC7701 ? Is there the capstan control voltage applied to pin (4) of AC connector ? Check X7701, C7705 and C7706. NO Only PB mode inoperative. Only REC mode inoperative. NO NO NO Check pin (75) of IC7701. NO Check the composite sync. signal line between pin (14) of IC2201, Q2201, Q2202 and Q7706 all the way up to pin (84) of IC7701. Replace IC7701. NO YES NO Replace the FFC AA-MH. NO Replace A/C head. NO A B

VCR RECORDING MODE (LUMINANCE) TROUBLESHOOTING No record. Are there Y/C data and clock signals (IIC bus data and clock) at pins (8) and (7) of IC2201 respectively when recording starts ? Check the PC5V line. NO Check data and clock signals from pins (52) and (51) of IC7701. Is there a signal at pin (29) of IC2201 ? YES Is there a signal at pin (57) of IC2201 ? Is there a signal at pin (26) of IC3301 ? YES Are pins (36) and (35) of IC3301 at 5V level ? YES Check the connector AH and cylinder. YES Is there a signal at pin (10) of IC3301? Replace cylinder. Is there 5V at pin (4), (21), (48) and (63) of IC2201 ? YES Check pins (27), (38) and (36) of IC2201 and signal line. YES Check pins (30), (31) and peripheral circuit. NO Check the signal line all the way up to pin (57) of IC2201. Check the signal line all the way up to pin (57) of IC2201. NO Check PC5V and the BIAS CTL (H) line. Replace IC3301. NO NO YES YES NO NO FLOWCHART NO. 1-14 VCR RECORDING MODE (CHROMA) TROUBLESHOOTING Record is in black and white (E-E colour mode). Are there Y/C data and clock signals at pins (8) and (7) of IC2201 respectively when recording starts ? Check the PC5V line. Check the signal at pin (99) of IC2201. (Frequency, 4.43MHz (PAL/SECAM), Frequency, 3.58MHz (NTSC)). NO Check data and clock signals from pins (52) and (51) of IC7701. Is there a signal at pin (57) of IC2201 ? Is there a (Chroma) signal at pin (26) of IC3301 ? Check X5501, X5502 and peripheral circuit. Replace IC2201. NO Check the chroma rotation pulse line. Is there 5V at pin (4), (21), (48) and (63) of IC2201 ? YES Check parts around pins (12), (43), (45) and (10) of IC2201 and signal line. Is there chroma rotation pulse at pin (65) of IC2201 ? NORMAL ABNORMAL YES YES NO

VCR PLAYBACK MODE (LUMINANCE) TROUBLESHOOTING No playback. Are there Y/C data and clock signals at pins (8) and (7) of IC2201 respectively when playback starts ? Check the PC5V line. NO Check data and clock signals from pins (52) and (51) of IC7701. Are there signal at pin (30) of IC3301 ? NO Is there a signal at pin (57) of IC2201 ? NO Is there a signal at pin (27) of IC2201 ? NO Is there a signal at pin (25) of IC2201 ? Check TV Section. NO Check the H. SW. Pulse line. Check video head and/or replace IC3301. NO Check the PC5V line. Replace IC2201. Is there 5V at pin (36) of IC3301 ? YES YES Is there H. SW. Pulse at pin (1) of IC3301 ? YES YES NO FLOWCHART NO. 1-16 VCR PLAYBACK MODE (CHROMA) TROUBLESHOOTING Playback is in black and white. Are there Y/C data and clock signals at pins (8) and (7) of IC2201 respectively when playback starts ? Check the signal at pin (99) of IC2201. (Frequency, 4.43MHz (PAL/SECAM), Frequency, 3.58MHz (NTSC)). NO Check data and clock signals from pins (52) and (51) of IC7701. Is there a signal at pin (30) of IC3301 ? X5501, X5502 and peripheral circuit. Replace IC2201. NO Check the pin (35) of IC3301 is 0V (Bias CTL (H) line) and peripheral circuit of IC3301. YES NORMAL ABNORMAL YES YES Check connector AH. Check between pin (30) of IC3301 and all the way up thru to pin (57) of IC2201. Is there 5V at pin (4), (21), (48) and (63) of IC2201 ? YES NO Is there a chroma signal at pin (7) of IC2201 ? YES NO Is there a signal at pin (10) of IC2201 ? YES NO Is there chroma signal at pin (25) of IC2201 ? Check parts around pins (12), (43), (45) and (10). Check the chroma rotation line. Is there chroma rotation at pin (65) of IC2201 ? YES YES YES Check the IIC bus data and clock at pins (8) and (7) of IC2201. Check the system (AUTO/PAL/SECAM/NTSC) of the TV circuit. Check pin (13) of IC2201. NO GOOD NO GOOD NO GOOD Head cleanning. Check the signal line all the way up to pin (30) of IC3301.

No Sound. No record. YES NO Is there 0.7V voltage level at pin (70) of IC2201 ? Check BIAS CTL (H) line. NO Is there a signal at pin (81) of IC2201 ? Are there the IIC bus data and clock signal at pins (8) and (7) of IC2201 ? YES YES Replace IC2201. Check the IIC bus data and clock signal line. NO NO Is there supply voltage of 9V feed to at pin (2) of T6601 ? Check PC 9V line. YES YES NO Is there a Bias Oscillator signal at pin (6) of T6601 ? Check T6601, Q6603, Q6604 and their peripheral parts. YES NO YES Is there a signal (Bias+Audio sig.) at pin (4) of connector AA. Check FFC MH-AA and A/C head. No E-E signal. NO Is there an Audio signal at pin (87) of IC2201 ? Check parts around the audio inputs jack, and circuits around the audio output circuit in TV tuner. No playback. NO NO YES YES NO Is there supply voltage of 5V feed to pin (84) of IC2201 ? Check the PC 5V line. NO NO Are there the IIC bus date and clock signal at pins (8) and (7) of IC2201 ? Check between pins (8) and (7) of IC2201 and all the way thru to pins (52) and (51) of IC7701. Is voltage of pins (86) and (88) of IC2201 normal ? Is there a signal at pin (85) of IC2201 ? Check signal line between pin (85) of IC2201 and TP6601. Is there "L" level at pin (72) of IC2201. Check A-MUTE (H) line. YES YES Replace IC2201. YES Is there an Audio signal at pin (74) of IC2201 ? NO Is there "L" level at pin (72) of IC2201 ? NO Is there a signal at pin (85) of IC2201 ? Is there "L" level at pin (70) of IC2201 ? YES YES YES Check line between pin (85) of IC2201 and the audio speaker output. YES YES Are the FFC MH-AA and the PB AMP's peripheral parts normal ? NO GOOD Clean A/C head. Are azimuth and height of the A/C head properly adjusted ? Check AUDIO MUTE (H) line. Replace IC2201. Check BIAS CTL (H) line. NO Replace defective parts. NO Readjust azimuth and height. YES Replace A/C head. FLOWCHART NO. 1-17 NO Check the signal line all the way up to pin (81) of IC2201 and pin (6) of T6601.

KEY-IN TROUBLESHOOTING Key-in input is not received. FLOWCHART NO. 2-1 TV TROOUBLESHOOTING TABLE Set not operating Is the key switch in good contact ? Check the switch contact. Is there short-circuit in the key input ? Check key lines to input of IC1001. NO YES NO Are signals received at pins (74) and (75) of IC1001 when the key is activated ? Check IC1001 and switches for poor soldering. Check IC7701 and signal line of serial datas, serial clock and ready (L). NO YES YES NO FLOWCHART NO. 2-3 INFRARED R/C TROUBLESHOOTING No operation is possible from the infrared remote control. Check R1074, D1006 and GND lines. NO NO NO YES Is "L" pulse given out of pin (1) of the receiver and received at pin (79) of IC1001, when the infrared remote control is activated ? Does the infrared remote control function ? Is 5V applied at pin (2) of the remote control receiver ? Replace the infrared remote control as required. Check pin (79) of IC1001. and/or receiver. Is fluorescent lighting enough away from the set ? YES Reposition the set not to be exposed to strong light. YES Is there short-circuit in the key input or IC1001 ? Check key input terminals. Check IC1001, and signal line of serial datas, serial clock and ready (L). Is AC cord connected ? Is 350V DC applied to C704 ? Connect AC cord. NO NO AC cord broken. Is F1701 blown ? YES Is 19V DC applied to pin (4) of IC701 ? Check R702, R703, Q701, D714, Q702, R717, R714, D713 and IC701. NO Is AC applied to line between (1) and (2) of A-connector ? YES NO Does pulse waveform exist at line between (2) and (3) of IC701 ? Is 350V DC applied to line between (2) and (3) of IC701 ? YES Check secondary circuits of D751~D754, D764 and FB751~FB756. NO Pins (7), (5) of T701 open. YES Check IC701 and adjacent parts. NO Check D701 L1701 and L1702. YES Check D701 line between (3) and (2) of IC701, L1701 and L1702.

TV TROUBLESHOOTING TABLE NO RASTER F1701 Check Blown out FLOWCHART NO. 2-5 NO PICTURE, NO SOUND Normal Replace the Fuse T701 Pin (7) voltage check about: 350V DC The Fuse is again blown out Normal IC701 Check +B voltage check about: 115V Normal Normal CRT connector K3~K5 bias check Abnormal Normal Normal Abnormal R701 Abnormal IC701, IC751, D710, D752 Normal R604, R620, Q601, Q602 IC801, Q801, Q802, Q803 about: 0V D752, Q751, Q752 C1807, R603 D701, C704 Noise increases but no signal is received. Is there a signal at pin (8) of IC401 ? Picture noise decrease but sound level varies greatly. Is there a signal at pin (8) of IC301. Is there a signal at pin (1) of IC401 ? Check IC401 and adjacent parts NO NO Is there a signal at pin (47) of IC801 ? Check IC801 and adjacent parts. Check IF Circuit and tuner bias. Check Tuner AGC. R475, C481 NO NO NO NO YES YES YES YES YES YES YES Check the signal line between pin (3) of IC351 and pin (8) of IC301. Is there a signal at pin (3) of IC351. Is there a signal at pin (1) of IC301 ? NO Check or replace IC351 and/or adjacent parts. Is there a signal at pin (8) of IC351 ? Check the speaker. Check IC301 and adjacent parts. Does the noise level increase at max, Contrast, Brightness, and Sound Control ? Abnormal Normal Check RF AGC of IF Circuit. Check IF Circuit and Tuner circuit. Does the 6.6V (+B) appear at pin (18) of IC251 ? Abnormal Normal Check the D252, R289, R290. Check the IC201 and adjacent parts. Check IC1001 Abnormal Circuit to be checked: 1. TUNER 2. PIF 3. Automatic gain control 4. 9V power source

NO VERTICAL SCAN NO NO NO YES Vertical freq check FLOWCHART NO. 2-7 NO SOUND Does waveform appear at pin (8) of IC301 ? YES Does waveform appear at pin (3) of IC351 ? Check IC301, IF Circuit and adjacent parts. Check IC351 and adjacent parts. Check pin (29) of IC801 and adjacent parts. NO YES FLOWCHART NO. 2-8 NO PLAYBACK PICTURE Is there a signal at pin (1) of IC801 ? Check IC801 and adjacent parts as same as "NO PICTURE". Check the VCR: TROUBLE SHOOTING "NO PLAYBACK". YES Does waveform appear at pin (8) of IC351 ? Check the speaker. Normal Pin (53) of IC801 Abnormal IC801 pin (54) bias check. Normal IC801 Abnormal IC501 bias check. Normal D501~D504, C503, C504, C511, R513 Abnormal Check the connectors F5, F6 and adjacent parts. NO YES FLOWCHART NO. 2-9 NO PLAYBACK SOUND Is there a signal at pin (28) of IC801 ? Check the TV: TROUBLE SHOOTING "NO SOUND". Check the VCR: TROUBLE SHOOTING "NO SOUND".

» IC801 and its Adjacent Circuit » R. G. B. Output Circuit FLOWCHART NO. 2-10 NO SPECIFIC COLOUR (PAL) NO NO YES YES YES NO Is there a chroma signal at pin (42) of IC801 ? Check IF Circuit and adjacent parts. Is the white balance properly adjusted ? Is some colour produced in B/W broadcast reception ? Readjust the white balance. The picture colour is green or magenta. Check Q1801 and its adjacent circuits. (Q1802 for VT-G14) The picture colour is red or cyan. Check Q1802 and its adjacent circuits. (Q1801 for VT-G14) The picture coloour is blue or yellow. Check Q1803 and its adjacent circuits. IC801 X801 (16.2MHz) Specific colours are not produced in colour broadcast reception. Circuits to be checked: » IC801 and its Adjacent Circuit » R. G. B. Output Circuit FLOWCHART NO. 2-11 NO SPECIFIC COLOUR (SECAM) NO NO NO NO NO YES YES YES YES Is there a chroma signal at pin (42) of IC801 ? Specific colours are not produced in colour broadcast reception. Is some colour produced in B/W broadcast reception ? When change channel does colour appear ? Colour appears but colour shading. NO NO YES When colour control minimum, colour disappears. Check IF Circuit and adjacent parts. Is the white balance properly adjusted ? YES YES IC801 Colour appears but abnormal colour. NO (Abnormal) YES (Normal) Does colour appear when colour system is SECAM ? IC801 Check the VCR. Does the voltage 1.5V appear at pin (5) of IC7701 in receiving SECAM broadcast ? Check IC7701, IC1001, signal line of serial datas, serial clock and ready (L) between them. Roster is coloured red or cyan. Check Q1802 and its adjacent parts. (Q1801 for VT- G14) Roster is coloured green or magenta. Check Q1801 and its adjacent parts. (Q1802 for VT- G14) Roster is coloured blue or yellow. Check Q1803 and its adjacent parts. Check IC2201 and SECAM det. (H) line. Readjust the white balance.

» IC801 and its Adjacent Circuit » R. G. B. Output Circuit FLOWCHART NO. 2-12 NO SPECIFIC COLOUR (NTSC) NO NO YES YES YES NO Is there a chroma signal at pin (42) of IC801 ? Check IF Circuit and adjacent parts. Is the white balance properly adjusted ? Is some colour produced in B/W broadcast reception ? Readjust the white balance. The picture colour is green or magenta. Check Q1801 and its adjacent circuits. (Q1802 for VT-G14) The picture colour is red or cyan. Check Q1802 and its adjacent circuits. (Q1801 for VT-G14) The picture colour is blue or yellow. Check Q1803 and its adjacent circuits. IC801, X801 (16.2MHz) Specific colours are not produced in colour broadcast reception.

CRT UNIT PWB-D (ONLY for VT-G14) CRT UNIT PWB-F (ONLY for VT-G21) KEY UNIT PWB-F (ONLY for VT-G14) KEY UNIT MAIN UNIT PWB-A PWB-E FRONT AV UNIT

PWB-D CRT UNIT (Only for VT-G14) PWB-D CRT UNIT (Only for VT-G21) PWB-B TUNER/DEF UNIT PWB-C POWER UNIT PWB-G IF UNIT

SCHEMATIC DIAGRAM SAFETY NOTE: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACEING PARTS. 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING. IMPORTANT SAFETY NOTICE: BE SURE TO USE GENUINE PARTS FOR SECURING THE SAFETY AND RELIABILITY OF THE SET. PARTS MARKED WITH "å" ( ) ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY AND PERFORMANCE OF THE SET. SERVICE PRECAUTION: THE AREA ENCLOSED BY THIS LINE ( ) IS DIRECTLY CONNECTED WITH ACMAINS VOLTAGE. WHEN SERVICING THE AREA, CONNECT AN ISOLATING TRANSFORMER BETWEEN TV RECEIVER AC LINE TO ELIMINATE HAZARD OF ELECTRIC SHOCK. CAUTION: This circuit diagram is original one, therefore there may be a slight difference from yours. NOTES: 1. The unit of resistance "Ω" is omitted. (K = kΩ = 1000 Ω, M = MΩ). 2. All resistors are 1/8 watt, unless otherwise noted. 3. The unit of capacitance "F" is omitted. (µ = µF, P = µµF). 4. The values in parentheses are the ones in the PB mode; the values without parentheses are the ones in the REC mode. VOLTAGE MEASUREMENT CONDITIONS: 1. DC voltages are measured between points indicated and chassis ground by VTVM, with AC 110 ~ 240V, 50/60Hz supplied to unit and all controls are set to normal viewing picture unless otherwise noted. 2, Voltages are measured with 10000µV B&W or coloour signal. WAVEFORM MEASUREMENT CONDITIONS: 10000µV, 87.5% modulated colour bar signal is fed into tuner.

TOP VIEW SIDE VIEW 56 29 1 28 TB1226DN 22 12 1 11 FX0008GE 4 3 1 2 BA7357S KA7809P S24C04A 8 5 1 4 AN3363S 36 17 1 16 2SA1266 2SC3198 2SC2001 2SC1906 BASE COLLECTOR EMITTER 2SC2229 2SC2482 2SC3939 BASE COLLECTOR EMITTER KTA1024 DTC144ES BASE COLLECTOR EMITTER B C E 2SD1877 2SD2586 1 2 3 STRF6654 1 2 3 4 5 1 2 3 SE115N PST600D KiA7045P TDA7056A PQ09RD11 2SD1944 1 2 3 1 9 TA7348P 1 9 BA7755 1 5 1 4 iX3057CE NN3572F 1 30 80 51 31 50 100 81 iX3109CE 1 24 64 41 80 65 25 40 BA6209 1 10 2SC3851 B C E 2SC3789 E C B E C B 2SB564 2SD471 2SB1117 E C B 1 7 LA7830 iX0037CE A K

76 VT-G14 VT-G21 WAVEFORMS (VT-G14) AC: 1.0Vp-p DC: 4.8V 1 AC: 0.7Vp-p DC: 1.7V 2 AC: 0.9Vp-p DC: 1.8V 3 AC: 2.7Vp-p DC: 1.2V 4 AC: 2.8Vp-p DC: 1.2V 5 AC: 3.0Vp-p DC: 1.2V 6 AC: 1.8Vp-p DC: 0V 7 AC: 1.5Vp-p DC: 0V 8 AC: 47Vp-p DC: 2V 9 AC: 140Vp-p DC: 0V 0 AC: 950Vp-p DC: 0V q AC: 1.0Vp-p DC: 0V w AC: 110Vp-p DC: 138V e AC: 110Vp-p DC: 135V r AC: 110Vp-p DC: 140V t

77 VT-G14 VT-G21 WAVEFORMS (VT-G21) AC: 1.0Vp-p DC: 4.8V 1 AC: 0.7Vp-p DC: 1.7V 2 AC: 0.9Vp-p DC: 1.8V 3 AC: 2.7Vp-p DC: 1.2V 4 AC: 2.8Vp-p DC: 1.2V 5 AC: 3.0Vp-p DC: 1.2V 6 AC: 1.8Vp-p DC: 0V 7 AC: 1.5Vp-p DC: 0V 8 AC: 47Vp-p DC: 2V 9 AC: 122Vp-p DC: 0V 0 AC: 1030Vp-p DC: 0V q AC: 1.0Vp-p DC: 0V w AC: 104Vp-p DC: 124V e AC: 116Vp-p DC: 124V r AC: 124Vp-p DC: 128V t

MAIN and FRONT AV Unit

CRT and POWER Unit

KEY and IF Unit

TUNER/DEF Unit

MAIN and FRONT AV Unit

CRT and POWER Unit

KEY and IF Unit

TUNER/DEF Unit

Ë OVERALL BLOCK DIAGRAM

Ë SERVO PROCESS BLOCK DIAGRAM

Ë SYSTEM CONTROL BLOCK DIAGRAM

Ë SAFETY DEVICE BLOCK DIAGRAM

Ë AUDIO BLOCK DIAGRAM

BE SURE TO USE GENUINE PARTS FOR SECURING THE SAFETY AND RELIABILITY OF THE SET. PARTS MARKED WITH "å" AND PARTS SHADED (IN BLACK) ARE ESPECIALLY IMPORTANT FOR MAINTAINING THE SAFETY AND PROTECTING ABILITY OF THE SET. BE SURE TO REPLACE THEM WITH PARTS OF SPECIFIED PART NUMBER. SAFETY NOTE: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACEING PARTS. 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING. NOTES: 1. The unit of resistance "Ω" is omitted. (K = kΩ = 1,000 Ω, M = MΩ). 2. All resistors are 1/16 watt, unless otherwise noted. 3. The unit of capacitance "F" is omitted. (µ = µF, P = µµF). 4. The values in parentheses are the ones in the PB mode; the values without parentheses are the ones in the REC mode. VOLTAGE MEASUREMENT CONDITIONS: 1. DC voltages are measured between points indicated and chassis ground by VTVM, with AC 220 ~ 240V, 50/60Hz supplied to unit and all controls are set to normal viewing picture unless otherwise noted. 2, Voltages are measured with 10,000µV B&W or colour signal. WAVEFORM MEASUREMENT CONDITIONS : 10,000µV, 87.5% modulated colour bar signal is fed into tuner. CAUTION: This circuit diagram is original one. Therefore there may be a slight difference from yours. DESCRIPTION OF VCR SECTION SCHEMATIC DIAGRAM

VCR-2 Unit

VCR-2 Unit

PWB-C: POWER Unit (Wiring Side)

PWB-D: CRT Unit (Wiring Side)

PWB-E: FRONT AV Unit (Wiring Side) (Wiring Side) (Chip Parts Side)

(Wiring Side) PWB-B: TUNER/DEF Unit

identified in this manual: electrical components having such fea- tures are identified by "å" in the Replacement Parts Lists. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended replace- ment parts shown in this service manual may create shock, fire or other hazards. "HOW TO ORDER REPLACEMENT PARTS" To have your order filled promptly and correctly, please furnish the following informations. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION MARK #: SPARE PARTS-DELIVERY SECTION Ref. No. Part No. # Description Code PRINTED WIRING BOARD ASSEMBLIES (NOT REPLACEMENT ITEM) PICTURE TUBE PWB-A: DUNTK9568WEV0/V1 MAIN UNIT INTEGRATED CIRCUITS IC351 VHiTDA7056A-1 R Audio Amp. AP IC780 VHiPQ09RD11-1 R 9V Regulator AG IC801 VHiTB1226DN-1 R PAL/SECAM/NTSC BB IC1001 RH-iX3109CEZZ R MPU BE IC1002 VHiS24C04A/-1 R EEP ROM AL IC1003 VHiPST600D/-1 R Reset-IC AD IC1004 VHiKiA7045A-1 R 5V Regulator AE IC2201 VHiNN3572F/-1 R YC/Audio Processor BA IC3301 VHiAN3363S/-1 R Head Amp. AH IC6601 VHiBA7755//-1 R Head Switch AD IC7701 RH-iX3057CEZZ R Servo/System Controller BA IC7702 VHiBA6209//1E R Loading Motor Driver AG TRANSISTORS Q301 VS2SC2412KQ-1 R 2SC2412K AA Q302 VSUN2213///-1 R UN2213 AA Q303 VS2SC2412KQ-1 R 2SC2412K AA Q471 VS2SA1037KQ-1 R 2SA1037K AA Q472 VS2SA1266-Y-1 R 2SA1266(Y) AA Q473 VS2SA1266-Y-1 R 2SA1266(Y) AA Q474 VS2SA1266-Y-1 R 2SA1266(Y) AA Q475 VS2SC2412KQ-1 R 2SC2412K AA Q780 VS2SD1944K/-1 R 2SD1944K AE Q781 VS2SD471-KL1E R 2SD471 AC Q782 VSUN2213///-1 R UN2213 AA Q783 VS2SB564-KL-1 R 2SB564 AC Q801 VS2SA1266-Y-1 R 2SA1266(Y) AA Q802 VS2SA1266-Y-1 R 2SA1266(Y) AA Q803 VS2SA1266-Y-1 R 2SA1266(Y) AA Q1001 VSUN2213///-1 R UN2213 AA Q1002 VS2SB564-KL-1 R 2SB564 AC Q1003 VSUN2213///-1 R UN2213 AA Q1004 VS2SC2412KQ-1 R 2SC2412K AA Q1005 VS2SC2412KQ-1 R 2SC2412K AA Q1006 VS2SC2412KQ-1 R 2SC2412K AA Q1007 VSUN2213///-1 R UN2213 AA Q2206 VS2SA1037KQ-1 R 2SA1037K AA Q2207 VS2SA1037KQ-1 R 2SA1037K AA Q2208 VS2SC2412KQ-1 R 2SC2412K AA Q2209 VS2SC2412KQ-1 R 2SC2412K AA Q2210 VS2SC2412KQ-1 R 2SC2412K AA Q2215 VS2SC2412KQ-1 R 2SC2412K AA Q2217 VS2SC2412KQ-1 R 2SC2412K AA Q2218 VSUN2113///-1 R UN2113 AA Q2219 VSUN2213///-1 R UN2213 AA Q2220 VS2SA1037KQ-1 R 2SA1037K AA Q2224 VSUN2113///-1 R UN2113 AA Q2227 VSUN2213///-1 R UN2213 AA Q2233 VSUN2213///-1 R UN2213 AA Q5504 VSUN2213///-1 R UN2213 AA Q5507 VS2SC2412KQ-1 R 2SC2412K AA Q6601 VSUN2213///-1 R UN2213 AA Q6603 VS2C3939SQR-1 R 2C3939SQ AC Q6604 VS2SC2001LK-1 R 2SC2001L AA Q6605 VSUN2113///-1 R UN2113 AA Q6606 VSUN2212///-1 R UN2212 AA Q6607 VSUN2113///-1 R UN2113 AA Q6608 VS2SC2412KQ-1 R 2SC2412K AA Q6610 VSUN2213///-1 R UN2213 AA Q7705 VS2SD1306-E-1 R 2SD1306 AC Q7706 VS2SC2412KQ-1 R 2SC2412K AA Q7711 VS2SC2412KQ-1 R 2SC2412K AA Q7712 VS2SB1117KU1E R 2SB1117K AE Q7720 VSUN2112///-1 R UN2112 AA Q7721 VS2SC2412KQ-1 R 2SC2412K AA Q7722 VS2SA1037KQ-1 R 2SA1037K AA Q7723 VS2SB1117KU1E R 2SB1117K AE Q7724 VS2SC3851A/-1 R 2SC3851A AD Q7725 VS2SC2412KQ-1 R 2SC2412K AA Q7851 VSUN2213///-1 R UN2213 AA MODEL VT-G14 PWB-A DUNTK9568WEV0 – Main Unit — PWB-B DUNTK9570WEV0 – TUNER/DEF Unit — PWB-C DUNTK9569FMV0 – Power Unit — PWB-D DUNTK9571WEV0 – CRT Unit — PWB-E DUNTK9572WEV0 – FRONT AV Unit — PWB-F DUNTK9576WEV0 – KEY Unit — PWB-G DUNTK9573WEV0 – IF Unit — MODEL VT-G21 PWB-A DUNTK9568WEV1 – Main Unit — PWB-B DUNTK9570WEV1 – TUNER/DEF Unit — PWB-C DUNTK9569WEV1 – Power Unit — PWB-D DUNTK9571WEV1 – CRT Unit — PWB-E DUNTK9572WEV0 – FRONT AV Unit — PWB-F DUNTK9576WEV1 – KEY Unit — PWB-G DUNTK9573WEV1 – IF Unit — MODEL VT-G14 å V801 VB370BVBK1S-S R Picture Tube (14") BZ å DY601 RCiLH0140PEZZ R Deflection Yoke BC å L799 RCiLG0031PEZZ R Degaussing Coil AN or RCiLG0080PEZZ R Degaussing Coil AL MODEL VT-G21 å V801 VB540ADAC1S*S R Picture Tube (21") CG å DY601 RCiLH0146PEZZ R Deflection Yoke BF å L799 RCiLG0025PEZZ R Degaussing Coil AW or RCiLG0069PEZZ R Degaussing Coil AR

AB D783 VHD1SS119//-1 R Diode AB D784 VHD1SS119//-1 R Diode AB D785 RH-EX0616GEZZ R Zener Diode, 5.8V AA D787 VHD1SS119//-1 R Diode AB D801 VHD1SS119//-1 R Diode AB D802 VHD1SS119//-1 R Diode AB D1001 VHD1SS119//-1 R Diode AB D1002 VHD1SS119//-1 R Diode AB D1003 VHD1SS119//-1 R Diode AB D1004 RH-EX1222CEZZ R Zener Diode, 6.2V AE D1005 RH-EX1222CEZZ R Zener Diode, 6.2V AE D1006 RH-EX0615GEZZ R Zener Diode, 5.6V AA D1007 VHD1SS119//-1 R Diode AB D1009 RH-EX0615GEZZ R Zener Diode, 5.6V AA D1301 VHD1SS119//-1 R Diode AB D2201 VHD1SS119//-1 R Diode AB D2202 VHD1SS119//-1 R Diode AB D2204 VHD1SS119//-1 R Diode AB D7701 VHD1SS119//-1 R Diode AB D7702 RH-PX0252GEZZ R GP1S563 AF D7703 RH-PX0252GEZZ R GP1S563 AF D7704 RH-PX0253GEZZ R GP1S94 AF D7705 RH-PX0253GEZZ R GP1S94 AF D7707 RH-PX0270GEZZ R LED, Cassette AC D7711 VHD1A3-F///-1 R Diode AA D7720 VHD1A3-F///-1 R Diode AA D7722 RH-EX0655GEZZ R Zener Diode, 19.1V AB D7737 VHD1SS119//-1 R Diode AB D8301 RH-PX0008PEZZ J LED, Power/Wakeup AE D8302 RH-PX0013PEZZ J LED, Rec AC D8303 RH-PX0013PEZZ J LED, Prog. Timer AC D8304 RH-PX0013PEZZ J LED, Child Lock AC Q7703 RH-PX0233GEZZ R Start Sensor AD Q7704 RH-PX0233GEZZ R End Sensor AD PACKAGED CIRCUIT PR1701 RMPTP0062CEZZ R Positive Coefficient Thermistor AH X801 RCRSB0260CEZZ R Crystal, 16.2MHz AK X1001 RCRSB0138GEZZ R Crystal AD X5501 RCRSB0166GEZZ R Crystal, 4.43MHz AG X5502 RCRSB0204GEZZ R Crystal, 3.58MHz AG X7701 RCRSB0159GEZZ R Crystal, 16MHz AF FILTER AND COILS CF1001 RFiLA0084CEZZ R Ceramic Filter AE L301 VP-DF120K0000 R Peaking 12µH AB L471 VP-CF101K0000 R Peaking 100µH AB L801 VP-DF101K0000 R Peaking 100µH AB L802 VP-DF101K0000 R Peaking 100µH AB L1301 VP-DF3R3K0000 R Peaking 3.3µH AB L1302 VP-CF3R3K0000 R Peaking 3.3µH AB L1303 VP-CF3R3K0000 R Peaking 3.3µH AB L1304 VP-DF3R3K0000 R Peaking 3.3µH AB L1305 VP-DF3R3K0000 R Peaking 3.3µH AB L1401 VP-DF3R3K0000 R Peaking 3.3µH AB L2202 VP-DF4R7K0000 R Peaking 4.7µH AB L2203 VP-XF330K0000 R Peaking 33µH AB L2205 VP-XF101K0000 R Peaking 100µH AB L2206 VP-ZK471K0000 R Peaking 470µH AB L2207 VP-ZK561K0000 R Peaking 560µH AB L2210 VP-XF221K0000 R Peaking 220µH AB L2214 VP-ZK221K0000 R Peaking 220µH AB L2223 RCiLP0312CEZZ R Coil AE L3301 VP-MK101K0000 R Peaking 100µH AB L6601 VPADK153J0000 R Peaking 15mH AC L6604 VP-DF221K0000 R Peaking 220µH AB L6605 VPADK822J0000 R Peaking 8.2mH AC L6607 VP-DF180K0000 R Peaking 18µH (VT-G14) AB L6607 VP-DF8R2K0000 R Peaking 8.2µH (VT-G21) AB L6610 VPADK153J0000 R Peaking 15mH AC L7701 VP-XF1R0K0000 R Peaking 1µH AB TRANSFORMER T6601 RTRNH0053GEZZ R Osc. Transformer AE CAPACITORS C303 VCEA0A1HW106M R 10 50V Electrolytic AB C305 VCEA0A1HW106M R 10 50V Electrolytic AB C306 VCEA0A1HW106M R 10 50V Electrolytic AB C307 VCEA0A1CW107M R 100 16V Electrolytic AC C308 VCKYCY1HF103Z R 0.01 50V Ceramic AA C309 VCEA0A1HW106M R 10 50V Electrolytic AB C371 VCEA0A1HW106M R 10 50V Electrolytic AB C372 VCEA0A1HW106M R 10 50V Electrolytic AB C471 VCEA0A1CW476M R 47 16V Electrolytic AB C472 VCEA0A1CW226M R 22 16V Electrolytic AB C474 VCKYCY1CF104Z R 0.1 16V Ceramic AA C475 VCEA0A1HW105M R 1 50V Electrolytic AB C476 VCEA0A1AW107M R 100 10V Electrolytic AB C477 VCKYCY1HF103Z R 0.01 50V Ceramic AA C478 VCKYPA1HF103Z R 0.01 50V Ceramic AA C479 VCEA0A1HW475M R 4.7 50V Electrolytic AB C480 VCKYCY1CF104Z R 0.1 16V Ceramic AA C481 VCEA0A1CW106M R 10 16V Electrolytic AB (VT-G14) C481 VCEA0A1HW106M R 10 50V Electrolytic AB (VT-G21) C482 VCCCCY1HH560J R 56p 50V Ceramic AA C483 VCEA0A1HW105M R 1 50V Electrolytic AB C484 VCEA0A1CW107M R 100 16V Electrolytic AC C571 VCEACA1HC225M R 2.2 50V Electrolytic AC C572 VCEA0A1HW105M R 1 50V Electrolytic AB C573 VCEACA1HC105M R 1 50V Electrolytic AC C574 VCEACA1HC105M R 1 50V Electrolytic AC C575 VCKYCY1HB102K R 1000p 50V Ceramic AA C576 VCKYCY1HB122K R 1200p 50V Ceramic AA C671 VCEA0A1HW475M R 4.7 50V Electrolytic AB C672 VCKYCY1HF103Z R 0.01 50V Ceramic AA C673 VCKYCY1HF103Z R 0.01 50V Ceramic AA C674 VCFYFA1HA224J R 0.22 50V Mylar AB C675 VCQYTA1HM103J R 0.01 50V Mylar AA C676 VCEA0A1HW105M R 1 50V Electrolytic AB C780 VCKYCY1HF103Z R 0.01 50V Ceramic AA C781 VCKYCY1HF103Z R 0.01 50V Ceramic AA C782 VCEA0A1CW107M R 100 16V Electrolytic AC C783 VCKYCY1HF103Z R 0.01 50V Ceramic AA C784 VCKYCY1HF103Z R 0.01 50V Ceramic AA C785 VCKYCY1HF103Z R 0.01 50V Ceramic AA C786 VCKYCY1HF103Z R 0.01 50V Ceramic AA C787 VCEA0A1CW107M R 100 16V Electrolytic AC C788 VCKYCY1HF103Z R 0.01 50V Ceramic AA C789 VCKYCY1HF103Z R 0.01 50V Ceramic AA C790 VCEA0A1CW107M R 100 16V Electrolytic AC C791 VCKYCY1HF103Z R 0.01 50V Ceramic AA C792 VCKYCY1HF103Z R 0.01 50V Ceramic AA C793 VCEA0A1CW476M R 47 16V Electrolytic AB C794 VCEA0A1CW476M R 47 16V Electrolytic AB C801 VCEA0A1CW107M R 100 16V Electrolytic AC C802 VCKYCY1HF103Z R 0.01 50V Ceramic AA C803 VCEA0A1CW107M R 100 16V Electrolytic AC PWB-A: DUNTK9568WEV0/V1 MAIN UNIT (Continued)