Tandy PC-6 Service Manual

CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 How To Open Upper Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Interrupt Circuit Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 LSI (Pin Functions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Test Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 PCB ASSEMBLY VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20 Electrical Parts . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Mechanical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 EXPLODED VIEW/DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 24 Main I3lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 24

Display Method Display Calculation Range Program System Program Language Number of Variables RAM Capacity Program Areas Number of Stacks Subroutine FOR w NEXT LOOP Operators Power Supply Power Consumption Battery Life Memory protection battery Auto Power-off Ambient Temperature Dimensions Weight SPECIFICATIONS 5 x 7 dot-matrix crystal 24digit, dot-matrix liquid-crystal display i10'99 w :t9.999999999 x 10” Stored System BASIC 26 fixed variables, exclusive character variable and array variables 7520 bytes (system area: 672 bytes) Maximum of 10 (P0 through P9) 8 levels 4 levels 12 levels 2 lithium batteries (CR-2032) for main frame 1 lithium battery (CR-1220) for memory backup Maximum 0.07W 1) Continuous program execution: approximately 85 hours 2) Continuous display of 5555555555 at 68°F (20°C): approximately 200 hours or 5.5 months when unit is used 1 hour per day NOTE: 1 hour includes 10 minutes of condition 1) and 50 minutes of con- dition 2) Approximately 2 years (with main batteries installed) Approximately 6 minutes 32° F to 104° F (0°C to 40° C) 3/4"H x 5-5/8"W x 2-3/4"D (18 mm x 142 mm x 71 mm) 5.8 oz (165 g), including batteries How To Open Upper Case Tweezers 1. Insert the tweezers into the back of the upper case. 2. Move tweezers gently in the direction indicated by the arrow in the figure below.

THEORY OF OPERATION Block Diagram DOT—MATR|X DISPLAY 5 x 7 dots, 24 digits a7’\za12, d7’\zd12 a1r\,a5, d1r\,d5 b7'\zb12, e7’\ze12 b1r\,b6, 314,55 c7~c12, RONR14 c1’\zc6, R0'\zR14 RAM IC3 Ks2’\uKs10 '

LSI Main CPU HD61747B20 BASIC control, Key signal input/output (lower keyboard), 1st to 6th digits and 13th to 18th digits display control. Sub CPU HD61747B25 Calculation, I/O control, key signal input/output (upper keyboard), 7th to 12th digits and 19th to 24th digits display control. Gate Array MB64H193 Interface between CPU and RAM, buzzer control. RAM HM6264ALFP-50‘ Stores data and program. RAM has 8K bytes (64K bits) capacity and contains a self-control circuit. LSI ROM CPU (Main) H D61747 B20 CPU (Sub) H D61 747 B25 RAM HM6264ALFP-50 113024 bits 1896 bits 113024 bits 1896 hits 65536 bits 226056 bits 69328 bits Input Buffer Code Buffer Z — Users Area -- M FT P3T P7T Communication Buffer 2 GOSUB STACK DISP Buffer FF— ¥.:'i:; FOR NEXT

Buzzer Control Circuit There are 3 ways to operate the buzzer: Key input, BEEP O, and BEEP 1 Mode BEEP 0 BEEP1 Key Input B2 Frequency 0.9 kHz 4.55 kHz 4.55 kHz 31 Time 110 msec. 110 msec. 11 msec. MBMH193 Interrupt Circuit 0 interrupt circuit for the clock pulse when VDD2 drops. 1. When the power is on, VDD2 is "L" level. 2. PG2 through the IC and 26th pin of the CPU receive PG2. 3. When VDD2 drops, the output of the IC becomes “GND” level and the CPU does not receive PG2. PG1 HD61747B25 0 Interrupt circuit for the voltage of the Gate Array and options when VDD2 and SW drop. 1. When the power is on, VDD2 and SW is "L” level. 2. VDD2 for Gate Array and VDD4 is also "L" level. 3. When VDD2 drops, VDD2 for Gate Array and VDD4 becomes ”GND" level and stops the op- ration of the RAM and options. sw VDD2(from IC 4) — VDD4 VDD2(from IC 2) HD61747B25 controls the upper keyboard. K52 ‘ HD61747B2 - K53“’K‘°’8 K59, K510 HD61747B20 controls the lower keyboard. Keyboard HD61747B2 K"‘5“’K””° Km11, Km12

Power Supply VSS1 Power supply voltage for TC4071 BF. VRAM Memory used to keep the voltage for the RAM. V1~V5 LCD drive voltages. Voltage is generated by connecting the external resistor to VDD2. VDD1 Power supply for the CPU, RAM and options. VDD2 Stays VDD1 at power—on. Goes to GND at power-off or APO (auto power—off).

LSI (Pin Functions) IC1, HD61747B2O lC2, HD61747B25 o°ol3r°3'R$§§"§§KE$°m‘3‘cB%$ A A A A E E’ E 1 64 2 63 3 62 4 61 5 60 5 59 7 58 8 57 9 58 -[Q 55 11 54 12 _ 53 13 _ 52 14 > 51 15 _ 50 16 _ 49 17 _ 48 18 _ 47 19 46 20 _ 45 21 > 44 22 b5 > 43 l\)|\)4300 0.00101 VV -54>an IC4, MB64H193 1N4 5 19 Signal Name D1, 2, 4, 8 INT KM’\zK1 SW V5’\;V1 PG2, PG1 R15’\IFl7 GND CE2 CE1 VDD1 VDD2 Signal Name Function Data in/out (D1, D2, D3, D4) Interrupt signal from RAM Key signal for keyboard Switch signal. GND at switch "OFF” and VDD1 at switch MON!!- Display voltage. Divided vol- tage from VDD1. CPU internal clock Display signal GND Chip designating signal. Select RAM or other devices Select RAM or other devices Power source VDD1 output from the LSI. VDD1 at switch "ON” and GND switch ”OFF". Clock pulse Operation signal Function I00, I06 ADO I07 AD1 VSS AD2, 10, 3 OE AD4’vAD12 VDD RW CS6’\ICS3 CS2’\uCSO B1, B2 S2 VSS S1 E OF Data in/out Address signal Data in/out Address signal Power source Address signal Output enable Address signal G ND Read/write signal Chip enable signal N C Buzzer signal G ND VSS G N D NC Data in/out Operation signal Clock pulse Power source Chip enable G N D Data in/out

lC3, HM6264ALFB-50 Signal Name Function NC NC A12'\:AO Address signal I/O1’\z|/O3 Data signal GND VSS terminal I/O4’\zl/08 Data signal CE1 Chip enable A10 Address signal OE Output enable A11, 9, 8 Address signal CE2 GND R/W ‘ Read/write signal vpp 1 GND DISPLAY Numbers and characters are displayed in 5 x 7 dots. Following is an explanation of a dot—matrix LCD. 3 I9 “_’. IQ 000-3 E—0000000 3 1 N 2 “_’. DDD-3 Lower electrode Lower electrode ‘°1Jla:d00000000- ;—00000000 U 0000000—— -—0000000N 0000000N0000000- I I I 0000 0000000—2 -0000000- Q0000000- ;—0000000 U 0000000—2 _—0000000N 0000000N0000 0000000—— g—0000000 0000000- 0000000g—0000000DT? 0000000- 1):0 tone Upper electrode 5 Upper electrode 13.1.’ 1131113glslUCIUUDDD CIDUDUUD DCICIDUDU DUCIUCIDCI DDCICIDUU DDDEICIUU DDDDDUDU‘-'UCl0ClClDD UDUUCIDCI CIDUCIDUU CIUDUDUU DDCIDDUU CIDUUUDD CIUDCJCIUD DDDDCIDCI UDUDDUD iii” U13 Left-half 12 digits Right-half 12 digits 81 d1 b1 31 On the upper electrode of the LCD, common signals RON R6 and R8~ R14 are applied horizontally while other signals a1'\»e1 to a12'\:e12 are applied I II II Egg?!-1+3? vertically on the lower electrodes as shown in above figures. I&I¢I*I II In the left figure, the upper—right corner of the dot is displayed when a vol- _ __ tage difference exists between signals R0 and a1. The CPU outputs the dis- play signals to the LCD display. CPU HD61747B20 controls the 1st to 6th and 13th to 18th digits of dis- play, while HD61747B25 controls the 7th to 12th and 19th to 24th digits.

TROUBLESHOOTING GUIDE Symptom Cause Solution C No display at all. Weak batteris Replace the batteries. Poor battery contact Clean the battery and contact spring. Lift the battery spring. Peeled heat seal Replace the heat seal. Broken heat seal Replace the heat seal. LCD (CA51-TS) Replace the LCD. LSI (HD61747B) Replace the LSI. A certain segment(s) Peeled heat seal Replace the heat seal. cannot be displayed. Broken heat seal Replace the heat seal. LCD (CA51-TS) Replace the LCD. LSI (HD61747B) Replace the LSI. Calculation impossible. LSI (HD61747B) Replace the LSI. A certain button does not Poor key contact Celan the contact pad on the PCB and the function. key contact rubber. Broken PC line Connect the PC line. Peeled heat seal Replace the heat seal. LSI (HD61747B) Replace the LSI.

Test Program Noms 1. After typing in the programs below, save the programs to a cassette tape for future use. 2. Memory and printer check programs cannot be executed at the same time because of a limited memory capacity. Memory check program Ready P% LIST 1% 2% 25 3% 4% 5% 6% 7% 8% 9% CLEAR C=904 DEFM C FOR B=1 TO C D(B)=B NEXT B $="ABCDEFGHIJKL MNOPQRSTUVWXYZ" BEEP 1: BEEP 1 PRINT "INPUT OK *". GOTO #1 Ready Pl LIST 5 7 1% 2% 3% 4% 5% 6% 1%% 1%1 11% 111 A=% A=A+1 FOR B=1 TO C IF D(B)#B THEN l%% NEXT B IF $="ABCDEFGHI JKLMNOPQRSTUVWX YZ" THEN 1%% IF A=5 THEN 11% PRINT A;: GOTO 7 PRINT "CHECK**N G**";: BEEP 1: BEEP %: GOTO 111 PRINT "A=";A; PRINT "CHECK**O K**";: BEEP 1: BEEP 1 PRINT "A=";A;: END Printer check program Ready Pl LIST 1% 2% 3% 4% 5% 6% 7% 8% 9% 11% MODE 7 PRINT " **PC— 6 CHECK** "; PRINT "ABCDEFG IJKLMNOPQRSTUVW XYZ"; PRINT "abcdefgh ijklmnopqrstuvw Xyzu; PRINT "%.123456 789"; PRINT "%'@¥[J&+ ~L->or.u)( + on-teal ' ° ~ZQuY5": PRINT "1#$?\<<> >#+()*/+—eN“; FOR A=1 TO 28 PRINT "8"; NEXT A PRINT " END- MODE 8

Program SAVE, LOAD and MEMORY System : 26-3651 or PC-5 cable (26-3671) Operation: (1) PW SW ON (2) CMT PLAY MODE H9 BUZZER RUN DEG END Ready P0 (4) PW SW OFF Take out the 26-3651 + CMT (5) PW SW ON BUZZER RUN DEG Ready P0 (6) BUZZER RUN DEG DEFM INPUT OK* (Buzzer sound) BUZZER RUN DEG DEFM INPUT OK*1 BUZZER RUN DEG DEFM INPUT OK* 1 2 BUZZER RUN DEG DEFM INPUT OK* 1 2 3 BUZZER RUN DEG DEFM INPUT OK* 1 2 3 4 BUZZER RUN DEG DEFM INPUT OK* 1 2 3 4CHECK**OK**A=5 (Buzzer sound)OK BUZZER RUN DEG DEFM INPUT OK* CHECK**NG**A=1 (Buzzer sound) NG

Printer check System: 263651 + or PC-5 + 26-3652 cable PC-4 Printer (26-3671) (1) PC—6 PW SW ON. (2) s 2 READY P0 Print sample: **PC-6 CHECK** ABCDEFGHIJKLMNOPORST UVWXYzabcdefghijklmn opqrstuvwxyzib . 123456 789%'@¥[]&<-Jr-*0DAX%6I 0052!-° Z§2uy6!#$'.°\<<> >5eT()*7+-e1r88888888 8888888888888888888 -END-

Operation Check 1. When mis—operation occurs, return to the nearest * mark and operate from the * mark. 2. When connecting the printer and cassette interface, be sure to turn off the power switch. Operation BUZZER WRT DEG 7520 P-‘Q-123456789 OWERTYUIOP BUZZER RUN DEG OWERTYUIOP )7’; *[BRK] ASDFGHJKL = Em BUZZER EXT RUN DEG ASDFGHJKL =‘i’ I;\ * BRK ZXCVBNM; :, BUZZER EXTRUN DEG \ I zxcvbnm; : / BUZZER EXTRUN DEG \ I -z-xcvbnm;: H I BUZZER EXTRUN DEG \ | / zxcvbnm; : , —H . BUZZER EXT RUN DEG i/ ;r\

Operation Read Out *@ 0.123+456—789*9/3 BUZZER EXTRUN DEG EXE -1910.877 BUZZER EXTRUN DEG (Check that the cursor moves.) E( ) T ‘-K-' II\ *[E] BUZZER EXTRUN DEG UR DEG (—191(D.877 t 2 T 310 loeetl BUZZER EXTRUN DEG STAT 1.2 ,0 BUZZER EXTRUN DEG 90 BUZZER EXTRUN DEG 90 E 00)

BUZZER HALE B? BUZZER 123EXE C? BUZZER A = 56088 BUZZER A = B*C BUZZER Ready P0 3 * l> BUZZER TRACEON Ready P0) BUZZER Ready P0 itI» OU rn BUZZER Ready P0

RUN GRA PRT ON BUZZER \|/ ,1\ BUZZER \|I 0-W- /«\ x|/ /I‘ “ [E3] BUZZER RA MEM e L31 1 Q\_v_IW BUZZER BUZZER ASMBL Asmbl/Source/ca1 BUZZER RUN GRA Ready P@

Operation * MODE 1 19 BEEP 1 EXE POWER SW OFF/ON Turn the contrast volume. Repeat 3 times. Read Out BUZZER RUN GRA Ready P0 BUZZER 10 BEEP 1 WRT GRA BUZZER 20 GOTO10 WRT GRA BUZZER RUN GRA (buzzer sound) BUZZER Display must disappear. Display should be ”Ready P0.” The display contrast must change.

PCB ASSEMBLY VIEW TOP VIEW as: ' _‘ : }‘:': ’ ‘ ' ‘ ,::|=!_-_l ‘V V‘ E ... V,>. ’ ‘Q; ' - W

PARTS LIST Electrical Parts ’ Description RS Part No. Mfr's Part No. CAPACITORS C1’\:C4 Chip, Ceramic, 100pF, 25V, i5%, CM21CH101J25V ACF-1466 _‘ 28907311 C5’\zC10 Chip, Ceramic, 0.1}.tF, 15V, +100%, CM21YV104P15V V ACF-734.7 71032167 C11, C12 Electrolytic, 22pF, 10V, :t20%, CE04C-1 A220MS7 \ CE-226MCBA 28047223 C13 Electrolytic, 100].tF, 10V, i20°/o, CE04C—1A101 MS CE-107MCBA 28041047 |Cs IC1 LSI, CPU, HD61747B2O MX-7273 20018364 IC2 LSI, CPU, HD61747B25 MX-7274 20018801 |C3 LS1, RAM, HM6264ALFP-50 MX-7275 20011149 lC4 LS1, MB64H193 MX-7276 20030453 lC5 IC, TC4071 BF MX-4245 21004359 PRINTED CIRCUIT BOARD ASSEMBLIES PC1 Assembly, PCB-G707-1 82636701 PC2 Assembly, PCB-G7 07-2 82636702 RESISTORS R1’\zR9 Chip, Ruthenium, 3.3 Kohm, 1/8W, :l:5%, CR32-108-332J-T-TP ND-0230EBN 27930620 R10 Chip, Ruthenium, 12 Kohm, 1/8W, i5%, CR32-108-123J-T-TP ND-0288EBN 27930638 R11 Chip, Ruthenium, 68 Kohm, 1/8W, :l:2%, CR32-108-683G-T-TP ND-035'4CBN 27904530 R12 Chip, Ruthenium, 220 ohm, 1/8W, i10%, CR32-108-221K-T-TP ND-0149FBN 27904734 R13’\zR16 Chip, Ruthenium, 3.9 Kohm, 1/8W, i5%, CR32-108-392J-T-TP ND-0237EBN 27903835 R17’\zR21 Chip, Ruthenium, 10 Kohm, 1/8W, d:2%, CR32-108-103G-T-TP ND-0281CBN 27930603 R22 Chip, Ruthenium, 22 Kohm, 1/8W, i5%, CR32-108-223J-T-TP ND-0311EBN 27903740 R23 Chip, Ruthenium, 2.2 Mohm, 1/8W, :l:5%, CR32-108-225J-T-TP ND-0454EBN 27904761 R24 Chip, Ruthenium, 100 ohm, 1/8W, i10%, CR32»108-101K—T-TP ND-0132FBN 27904629 MISCELLANEOUS D1’\zD3 Diode, 1S1588, silicon DX-0273 23003031 VR1 Volume, for contrast, 20 Kohm, EV L-AHAAO0B24 ‘ AP-7004 27709486

Mechanical Parts Ref N0- Description RS Part No. Mfr’s Part No. LCD, CA51-TS AL-1020 33310552 Connector, 126D—019-12804 AJ-7306 35113539 P spring, A33138A-1 ARB-7642 53253131 Seal, Heat, T-07-12 AHC-0107 56005846 Seal, Insulation, for heat seal, A47070-8 AHc.o344 63416110 Plate, Reinforcement, for LCD, C46480-1 63478850 Tape, Adhesive, for LCD, A43613~5 63415920 Tape, Adhesive, for LCD reinforcement plate, A45344-8 63375130 Connector, Non-direction, A46359-1 AJ-4025 63354990 Sheet, Keyboard, C3473-5 AHC-0346 82636721 Tape, Adhesive, for PCB reinforcement plate 63424150 Plate, Reinforcement, for PCB-G707—1, C3474A-1 AHC-0345 63415991 Assembly, Film, keyboard, C3769A—1 AK.0518 63471021 Film, Keyboard, C3768-1 AHC-0347 63471030 Cushion, for LCD, C41409-1 63505660 Seal, Heat, PCB-G707-1 to PCB—G707-2, CAX-12-3 _AHC-0348 56006320 Seal, Insulation, for heat seal of PCB AHC-0349 63471010 Seal, Insulation, for upper keyboard film AHC-0350 63470990 Seal, Insulation, for lower keyboard film AHC-0351 63471000 9 Plate, Shield, for volume ART-0278 63458880 Seal, Blind, for P spring, C41076-1 63471050 Seal, Insulation, for battery (non-repairable) Seal, Insulation, for RAM pack (non-repairable) Buzzer, EFB-S55C41AV1 AB-7002 32401627 Tape, Adhesive, for buzzer, A45381-1 63304750 Tape, Adhesive, for keyboard sheet, A44646—1 63275120 Holder, for PCB-G707-1, C2373-1 63470730 Plate, Shield, C3500-1 63415930 Window (Tandy) 82637403 Tape, Adhesive, for window, C4586A-1 63415891 Case, Upper, for display unit, C1141-5 63470460 Case, Lower, for display unit (Tandy), C1142-1 32536704 Plate, Name (Tandvl (non-repairable) Knob, Slide, C3499A-1 63416351 Spring, Switch contact, A46683-1 RB-5256 63353610 Film, Common, C3480-1 AHC-0111 63415950 Spacer, C3479-1 AHC-0352 63415960 Set, Keytop (Tandy) AHC-0353 82636705

11 12 13 14 15 16 17 18 19 Description Holder, Battery, for CR1220, A35803-1 Spring, Battery contact (—), for CR1220, A35801-1 Spring, Battery contact (+), CR1220, A35800-1 Seal, Insulation, for battery (CR1220), A46472-1 Holder, for PCB-G707-2, C1 251-1 Holder, Battery, for CR2032, A35802-1 Spring, Battery contact (—), for CR2032 Spring, Battery contact (+, —), for CR2032 Spring, Battery contact (+), for CR2032 Seal, Insulation, for battery (CR-2032), A45154-1 Seal, Insulation, for battery holder, A46473-1 Plate, Shield, for connector, C4609-1 Cap, Connector, C4615-1 Pin, Spring, 2.5 mm x 12 mm Label, Change for battery, (non-repairable) Tape, Lead, C4957-1 Seal, Blind, for PCB holder, C4991-1 Spacer, for lead tape, C41003-1 Tape, Adhesive, for volume shield plate, A45344-14 Plate, Reinforcement, for PCB holder, PCB-G707-2 Plate, Reinforcement, for PCB holder, PCB-G707-1 Tape, Adhesive, for PCB-G707-1 reinforcement Tape, Adhesive, for PCB-G707-2 reinforcement Seal, Insulation, for volume shield plate, C4639-1 Spring, Ground, for keyboard case, A47157-7 Spring, Ground, for keyboard film, C4988-1 Spring, Ground, for PCB holder, C4737-1 Screw, Tapping, flat head (+), 2 mm x 3.5 mm A45491-13, for PCB holder Screw, Tapping, flat head, (+), 2 mm x 3 mm A45491-1 1, for connector shield plate Screw, Tapping, flat head (+), 2 mm x 5 mm A44793-13, for battery (C R-1220) Screw, Machine, pan head, (+), 1.7 mm x 5 mm A45919-7, for battery (CR-2032) Case, Upper, for keyboard unit (Tandy) Case, Lower, for keyboard unit (Tandy) Hardware Kit Screw, Machine, pan head, (+), 1.7 mm x 5.4 mm x 3 pieces A45919-8 Battery, Lighium, CR2032 Battery, Lighium, (for Memory back up) CR1220 _22_ Mfr’s Part No. AB-0623 AB-062 1 AB-0622 AHC-0354 B-0058 A Fl B-7639 A RB-7640 A RB-7641 AHC-21 1 4 AB-0624 ART-0279 AHC-01 1 2 ART-0280 AHC-0355 AHC-0354 ARB-5025 ARB-5045 ARB-5046 AHD-2723 AHD-3002 AHD-3003 AHD-2012 AZ-0110 AHW-2603672 A HD201 3 ACS-0031 ACS-0030 63349650 63349890 63349900 63349910 63470550 63349640 63297621 63297630 63297640 63297660 63349720 63415940 63416410 52100356 63459150 63470840 63449540 63393830 63500830 63500840 63497930 63500850 63417130 63416020 63470830 63424160 63330000 63319760 63292930 63391 680 63470445 82636723 82636709 63426830 CR2032 CR1220

XPL0DE D V F.W wR.ASSEMBLY E INSTRUCTIONS 1. RemoveV3 screws m from the lower case. 3. Remove 9 screws ®, 1 screw @ and 1 screw @ 2. Lift up the lower case and®, from the PCB holder ® and®. Remove the PCB holder and 2 batteries. 4.

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RADIO SHACK, A DIVISION OF TANDY CORPORATION U.S.A.: FORT WORTH, TEXAS 76102 CANADA: BARRIE, ONTARIO L4M 4W5 TANDY CORPORATION AUSTRALIA DELSIUIA FRANCE UK. 51 KURRAIDIIE AVENUE RUE DES PIEDS D'ALDUEITE, 39 DP II'l'55DZ2 BILSIUN RUAD WEDIIESBURY IADUIII DRUITI, II.S.\V.2'IID SIID IIAN|IIIIE(IIAIAUR) DERBY PDNTDISE DEDEX WEST MIDLANDS WS 101 III PRINTED IN JAPAN @