Casio CE-6000 Troubleshooting Manual

Trouble shooting ECR V1.01 Trouble shooting guide for New ECR model MODEL: CE-6000, CE-6100, CE-7000, TK-6000, TK-7000, TK-6500, TK-7500 < CONTENS > 1. Flowchart for trouble shooting procedures 2. Trouble shooting procedures 2-1. Mask diagnostic operation 2-2. Repair the Main P.C.Board 1 2-3. IPL loading 2-4. Normal diagnostic operation 2-5. Repair the Main P.C.Board 2 3. The example of repair 3-1. How to remove the IC 3-2. Preparation for mounting the new IC 3-3. How to fix the IC 3-4. Cleaning after mounting the IC 1. Flowchart for trouble shooting procedures OK NG NG OK START 2-1. Mask diagnostic Result 2-3. IPL Loading 2-2. Repair the Main P.C.Board 1 2-4. Normal diagnostic ti Result 2-5. Repair the Main P.C.Board 2 END

Trouble shooting ECR V1.01 2. Trouble shooting procedures 2-1. Mask diagnostic operation The model CE-6000/7000 series and TK-6000/7000 series have the Mask diagnostic operation in the machine. The following test can be checked in the Mask diagnostic operation. 1) Flash ROM data erase after write test 2) RAM read after write test To start the Mask diagnostic operation, perform the following operation. START Turn off the power switch and set the Mode switch to PGM position. While pressing the reset switch and button, turn the power switch on. Release the reset switch first and then release the button. Then, the machine shows following code on the display. ( If it is no display, please refer the section 2-4 of page XX for repair.) Display “EEEEEEEEEE” means the non application in Flash ROM. If the display “EEEEEEEEEE”, please retry from START. Display “0000000000” means waiting the IPL start command. Input code “99990000” and press _{button. Mask diagnostic program is started. Flash ROM data erase operation. Display “ XX “ XX = 00 ~ 31 1BLK = 64Kbytes Flash ROM write test operation. Display “ XX “ XX = 00 ~ 31 1BLK = 64Kbytes RAM1 read/write test operation. Display “XXX “ XXX = 1FD ~ 000 1BLK = 1Kbytes END Display “0000000000”. This is waiting mode for IPL code input. If there is error, error code will be displayed. “EX” Display “E9X “ E91 = Flash ROM erase error. E92 = Flash ROM write error. E93 = Flash ROM read error. E94 = RAM1 read/write error. Note : If the power failure is happened during Mask diagnostic operation, the operation will be stopped and will be “EEEEEEEEEE” display.}

Trouble shooting ECR V1.01 Special error message : Fatal error code FErr20 Unfixed address is selected and unsettled error is happened. FErr26 Abruption of program working. The interruption of abnormal condition ( Watch dog ) is happened. FErr27 Stack pointer address become the except RAM address area. Note : If this error is happened, the Flash ROM program and data is damaged. Therefore, it is necessary to down load IPL data for ECR from a P/C or a RAM PACK. For the error FErr20 and 27, it may occur when the local software (IPL) is developed in case the developing time. Normally, this error is never happened in the standard IPL data. For the error FErr26, it may occur when the hard ware has some problem like a poor soldering at the Flash ROM pins or a spillage on the circuit of the address and data bus line. In this case, please clean the PCB and try to re-solder the Flash ROM pins and try to down load a IPL data. [How to solved the FErr26] When the error FErr26 is showed on the display at the machine, please resolder the Flash ROM 1 pins as showing in the figure. Re-solder the all lines. Flash ROM Re-soldering

Trouble shooting ECR V1.01 2-2. Repair the Main P.C.Board 1 To repair the No display machine, perform the following repair procedure. Note 1 : Each repair procedure refers to the each repair section. Note 2 : Refer the service manual section 5 for open the upper case procedure. NG OK NG OK NG OK START Check around the power supply. Check osillation of the pulse signal correct. Check the data bus line. END 2-2-1. Repair around the power supply. 2-2-2. Repair procedure 1 2-2-3. Repair procedure 2

Trouble shooting ECR V1.01 2-2-1. Repair around the power supply 1) Check AC input voltage by a multimeter tester. 2) Check the voltage from each output pins of connector CN1 from the power supply PCB. CN1 Pin No.1 — VC1(DC32.3V) :For the Display power CN1 Pin No.2 — VC2(DC24V) :For the Printer power CN1 Pin No.3 — VLED(DC5.85V) :For the Logic circuit power CN1 Pin No.4 — GND :Signal GND CN1 Pin No.1 DC 32.3V CN1 Pin No.3 DC 5.85V CN1 Pin No.4 GND 0V CN1 Pin No.2 DC 24V Note: Use the following GND point on the Main PCB for the oscilloscope. Use the GND point for the Oscilloscope. Connector CN1

Trouble shooting ECR V1.01 [DC/DC convertor circuit for Dot Display Tube at Display PCB E445B-E2] D2 Q2 VD1 Signal at D2 position Signal at VD1 position Signal at Q2 position 3) Check the DC/DC convertor in display PCB. [DC/DC convertor circuit for 7 segment Display Tube at Display PCB E445B-E2] Q3 VF1 Signal at Q3 position Signal at VF1 position

Trouble shooting ECR V1.01 2-2-2. Procedure Repair 1 1) Check that contact of CPU defective. ( For example, pin of CPU is floating. ) 2) Check that the power supply is supplied to CPU. ( For example, the cables between the CPU and the power supply are snapping. ) 3) Check “X1” of oscillator whether the signal of wave form is as follow. ( If not, resolder the connection point or replace “X1” of oscillator. ) 4) Check “IC10” of CPU. ( If there are no signal at the X1, resolder the connection point or replace “IC10” of CPU. ) 2-2-3. Procedure Repair 2 1) Visually check on the Main P.C.Board. ( For example, cold solder and surface flaw. ) 2) Check the data bus line and the address line of CPU. If there are a problem signals at the line, find out the reason and change the problem IC. (The each signal should be a digital signal like a following pulse wave form. If you see the voltage level is not +5V or 0V, find out the problem IC to follow the line. For example, change the IC7 of SN74LV374 address latch.) CPU clock X1 VDD +5V GND 0V Data bus line D0 Data bus CPU clock X1 wave form CPU Data bus D0 line wave form CPU clock X1

Trouble shooting ECR V1.01 3) Check the poor connection between CPU and RAM or Flash ROM1. Specially, check the Flash ROM1 connection to re-solder the all lines. 4) Check the RAM1 or Flash ROM1 chip enable signal. 5) If the signals of the address bus and the data bus are not stable (Ex: After some time, the all signal becomes GND level or so on.), replace “IC10” of the CPU to new one. [ Flash ROM1 chip enable signal ] Flash ROM1 chip enable signal Flash ROM1 chip enable Flash ROM1 pin No.9 Flash ROM1 IC6 Flash RST Flash ROM1 chip enable Bottom side of Main PCB Pin No.3 of IC25 (74LV00) Flash1 CE Address bus

Trouble shooting ECR V1.01 RAM1 Data bus D0 RAM Chip enable signal RAM1 chip enable RAM1 chip enable Pin No.22 RAM1 Address bus A0 RAM1 IC3 [ RAM1 chip enable signal ] RAM1 chip enable RAM1 chip enable Pin No.4 IC30 (74LV02)

Trouble shooting ECR V1.01 2-3. IPL loading ( Initial program loading opertion ) After preforming the MASK diagnostic operation, it is necessary to dawn load the IPL data. To start the IPL loading, perform the following opertion. [In case of using the P/C communication] START Turn off the power switch and set the Mode switch to PGM position. While pressing the reset switch and button, turn the power switch on. Release the reset switch first and then release the button. Then, the machine shows following code on the display. ( If it is no display, please refer the section 2-2 of page 4 for repair.) Display “EEEEEEEEEE” means the non application in Flash ROM. If the display “EEEEEEEEEE”, please retry from START. Display “0000000000” means waiting the IPL start command. Input code “44449999” and press _{button. Display “IPL 0000”. This is waiting a IPL data from a P/C or a Memory Cassette. Connect RS232C cable (PRL-CB-2) between COM1 port of ECR and COM2 of P/C. And, prepare the IPL file for ECR in the P/C. (IPL.exe file and IPL data XXXXXX) Press button for ECR and then input “IPL XXXXXX” and Enter key at the P/C. ( XXXXXX = Program name AAIYAC ) Display is changing from “0 IPL XXX” to “0 IPL4 XXX”. (XXX number will be counted down.) If the number does not count down, please check the connection of RS232C cables. When the ECR beeps 3 times and the display is changed to “0000000000”, the IPL loading is finished. END ECR side P/C side COM2 COM1 Cable PRL-CB-2}

Trouble shooting ECR V1.01 [In case of using the Memory Cassette RAC-9] START Turn off the power switch and set the Mode switch to PGM position. While pressing the reset switch and button, turn the power switch on. Release the reset switch first and then release the button. Then, the machine shows following code on the display. ( If it is no display, please refer the section 2-2 of page 4 for repair.) Display “EEEEEEEEEE” means the non application in Flash ROM. If the display “EEEEEEEEEE”, please retry from START. Display “0000000000” means waiting the IPL start command. Input code “44449999” and press _{button. Display “IPL 0000”. This is waiting a IPL data from a P/C or a Memory Cassette. Set the Memory Cassette RAC-9 that has IPL data to the ECR. Input code “20” and press button. Display is changing from “2 IPL4 XXX” to “2 IPL XXX”. (XXX number will be counted down.) If the number does not count down, please check the connection of the Memory Cassette. When the ECR beeps 3 times and the display is changed to “0000000000”, the IPL loading is finished. END ECR side Memory Cassette RAC-9 [Error code for IPL loading] Display On line error In line error Flash Pack IPL error 01: LRC check error 11: LRC check error 21: Write protect switch ON error 02: Time out error (over time between 12: Time out error (over time between 22: IPL time limit = 0 Packet 180sec, Data 5sec) Packet 180sec, Data 5sec) 23: No IPL data 03: Receive data format error 13: Receive data format error 24: Format error Sequence counter error Sequence counter error 26: Load memory size over error 08: Code flash erase/write error 14: ARCNET open error 28: Flash erase/write error 18: Code flash erase/write error Error code 1 I P L 1 E 0 3}

Trouble shooting ECR V1.01 2-4. Normal diagnostic opertion The following test can be checked in the diagnostic test. 1) Key code test 2) switch status test 3) Individual function test Note : Details of Normal diagnostic opertion, refer to the “SERVICE MANUAL”. NG OK NG OK NG OK NG OK NG OK NG OK START To START Normal diagnostic operation, refer to the "SERVICE MANUAL". Display test END A A A A A A 2-5. Repair the MainP.C.Board 2 A Keyboard test RAM2,3 or 4 test Flash Rom2 test Print test RS232C test

Trouble shooting ECR V1.01 2-5. Repair the Main P.C.Board 2 < Probable Causes > 1.Display tube is broken. NG 2.Communication lines or data between the display and the Main P.C.Board have a problem caused a poor connection or OK a some IC broken. 1.Button or Key switch is broken. NG 2.Spillage problem. 3.Circuit of the key common sheet is damaged. OK NG 1.RAM2,3 or 4 is broken. 2.Poor connection of solder line. 3.Chip enable IC is broken. OK NG 1.Flash ROM2 is broken. 2.Poor connection of solder line. 3.Chip enable IC is broken. OK 1.Print head is broken. ( Printer ) 2.Poor connection of the cable. 3.Motor is broken. 4.Paper Jam NG 1.Drive IC5 or transistor OK Q6 or Q8 is broken. ( Main P.C.Board ) 2.CPU IC10 has poor connection of solder lines. 1.COM1 IC18 is broken. NG 2.CPU IC10 has poor connection of solder lines. 3.Cable wiring is wrong. OK START Display Key Board RAM2,3 or 4 Flash ROM2 END RS232C Printer

Trouble shooting ECR V1.01 1) Warm IC by hotblow. 2) Warm all pins of IC generally. 3) Sometimes check condition of IC with tweezers. 4) If solder gradually will melt, tweezers is inserted little by little between IC and P.C.B. 6) Remove IC slowly, while confirming whether solder is melting. 5) IC clamps the location where there is not pin with tweezers. 7) Complete. Note : Please handle with care to re- move ICs. Because, there are possibil- ity that P.C.B breaks and also some pins of IC bends, when remove IC forcibly. 3. The example of repair 3-1. How to Remove IC

Trouble shooting ECR V1.01 1) Old solder is remaining, to the location that removed IC yet. First this old solder is removed. 2) Solder new solder at the pattern of IC. 3-2. Preparation of solder for IC 3) New solder and old solder can be removed by sliding the new solder that melted with soldering iron. Remaining even 3 places work similarly. 4) Able to solder IC easily by above work “3)”. 5) New IC is put on P.C.B. At this time, that the pin of IC does not deviate from the pattern. 7) Temporary soldering of IC is corner 4 places of IC. Refer to the above photograph. 6) Temporary soldering of IC. Note : Do temporary soldering accurately. In case that the location of IC deviated work of becomes to do over again.

Trouble shooting ECR V1.01 3-3. Solder IC 1) Much solder is soldered to all pins of IC. 4) Solder is removed, by raising the top of the solder iron in a slanting direction. 6) In the case that a little of solder remains, remove it by using the desoldering equipment. 2) Solder iron is slid in the left end from the right edge of IC like above photograph. At this time, top of the solder iron is the condition which only the solder is touching and part from the pin. ( See “[ Fig ]” ) 3) Most of the solder can cause to migrate it to the left end of IC by the above work “2)”. 5) “2)” to “4)” of work are repeated. After that become above photograph. 7) If removed solder too much with above work “6)”, solder a little of solder again. 8) Above works to other 3 places. Note : If stickiness appears and also solder changes color, please add new solder. It is easy to remove solder. Solder Gap I C IC-Pin Solder iron [ Fig ]

Trouble shooting ECR V1.01 3-4. Clean around IC 1) Rosin is remaining, to the location that soldered IC. 2) Ethyl alcohol is used, to remove rosin. 3) Rosin is removed carefully by using alcohol and cotton applicator. 4) After that around IC becomes clean like above photograph. Note1 : Be sure that the IC have no bent pins. A bent pin will make contact for a while, but after vibration it no longer does. Note2 : Cleanup does not use tissue paper.

Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan Trouble shooting V1.01 : Correction of page lines for Miss print