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Casio CE-6800 Service Manual

Printer model : m-u420b-031
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SERVICE MANUAL
(without price)
ELECTRONIC CASH REGISTER
CE-6800
(EX-475EP)
MAY. 2001
Printer Model : M-U420B-031
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Summary of Contents for Casio CE-6800

  • Page 1 SERVICE MANUAL (without price) ELECTRONIC CASH REGISTER CE-6800 (EX-475EP) MAY. 2001 Printer Model : M-U420B-031 INDEX...

  • Page 2: Table Of Contents

    CONTENTS CE-6800 Page 1. SPECIFICATIONS ..................1 2. BLOCK DIAGRAM ..................3 3. TO OPEN THE UPPER CASE ..............5 4. CIRCUIT EXPLANATION ................7 4-1. Power supply circuit ....................7 4-2. Reset and power down circuit .................. 8 4-3. CPU description ......................8 4-4.

  • Page 3: Specifications

    1. SPECIFICATIONS (CE-6800) 1-1. Electrical specifications 110V • Power consumption In operation Max. 0.7 A Min. 0.3 A Power OFF 0.3 A • Memory protection Back-up battery VL3032/1F2 90 days (25 °C) Back-up period Battery life Replace the battery every 5 years.
  • Page 4 1-4. Drawer List DRAWER NAME Specification NOTE • DL-2771 D-9A2C-B84-9* 1-5. Option List DEVICE NAME MODEL NOTE • RAM CHIP RAM-610-10LL Capacity 4Mbits (512 Kbytes) • Wet cover WT-77 • Modem Sports star Recommend model : U.S.Robotics 56.4Kbps Com 1 port only •...

  • Page 5: Block Diagram

    2. BLOCK DIAGRAM 2-1. PCB CONNECTION — 3 —...
  • Page 6 2-2. BLOCK DIAGRAM (CE-6800) Printer COM3 Main display Customer Keyboard Driver M-U420-031 COM2 (Dot & segment) display Driver COM1 ARCNET Printer driver IN-Line driver Option I/O PB14 Display driver and Key control circuit Address bus A8 - A19 uPD784215GC201-8EU Address...

  • Page 7: To Open The Upper Case

    3. TO OPEN THE UPPER CASE 1. Open the printer cover. Then, remove the ribbon cover from the machine. Open the printer cover. Remove the ribbon cover. 2. Remove the 2 screws of the upper case. Remove the 2 screws. 3.
  • Page 8 5. The each parts of the Main PCB are located as shown in the picture. RAM 1 (128 Kbytes) Flash ROM 1 (2 Mbytes) Reset Switch Printer cable Battery Power supply connector Buzzer Display cable RAM 4 Option RAM 3 Option COM 1 port Main PCB...

  • Page 9: Circuit Explanation

    4. CIRCUIT EXPLANATION 4-1. Power supply circuit The power supply circuit provides the following voltage for the main circuit. Output Pin No1----- VC1 (DC32.3V): To the VC line for the VFD Display power. (Not used for CE-6000) Output Pin No.2---- VC2 (DC24V): To the Vp line for the printer power.

  • Page 10: Reset And Power Down Circuit

    4-2. Reset and powe down circuit The rest and power down circuit are as following circuit. The reset switch is provided for the hard reset to cleare the system error. Use this switch only when the FMAC or MAC are not possible to perform. Reset switch The position of Reset switch From top of view...
  • Page 11 CPU pin description(uPD784215GC201-8EU) Pin No. Signal Name Description In/Out 1 P120 HEAD PIN DRIVE HD1 2 P121 HEAD PIN DRIVE HD2 3 P122 HEAD PIN DRIVE HD3 4 P123 HEAD PIN DRIVE HD4 5 P124 HEAD PIN DRIVE HD5 6 P125 HEAD PIN DRIVE HD6 7 P126 HEAD PIN DRIVE HD7...
  • Page 12 Pin No. Signal Name Description In/Out 51 P83 Bank selection RB3 52 P84 RB4/CB1 Bank selection RB4/CB1 53 P85 FB0/CB2 Bank selection FB0/CB2 54 P86 Bank selection FB1 55 P87 Connected to GND 56 P40 Data/address bus D0/A0 In/Out 57 P41 Data/address bus D1/A1 In/Out 58 P42...

  • Page 13: Momory Chip Selection Circuit

    4-4. Memory chip selection circuit The RAM chip select signals made by the following circuit. There are 4 chip enable signal lines for RAM selection and 3 chip enable signal lines for Flash ROM selection (including Memory cassette). RAM1 CE RAM2 CE RAM3 CE RAM4 CE...

  • Page 14: Flash Rom1 Address Circuit

    4-5. Flash ROM1 address circuit The Flash ROM1 address signals FA17 to FA20 are made by the following circuit. The Flash ROM1 (LH28F016SCT-L95, 16M bits) is used for the application program. Flash ROM1 (16M bits) CPU address BANK port Flash memory address NOTE A19 A18 A17 FC2 BANK...

  • Page 15: Printer Drive Circuit

    Memory map 00000h CPU internal memory Mask ROM 128K RAM 5K 0FFD0h External I/O Mapping 16bytes 0FFE0h 20000h RAM1 128 K bytes 40000h Not used 80000h Bank area Flash 1 384 K bytes 16 M bit (for A0000h Application 8 M bit program area) 4 M bit 2 M bytes...

  • Page 16: Rs232C Port Com1 Circuit

    4-8. RS232C port COM1 circuit The COM1 circuit is as follows: The COM1 port pin location is as shown below: Signal — 14 —...

  • Page 17: Rs232C Port Com2 And Com3 Circuit

    4-9. RS232C port COM2 and COM3 circuit The circuits of COM2 and COM3 are as follows: TP48 COM3 COM2 The COM2, and COM3 port pin locations are as shown below: COM2 port COM3 port Signal Signal VCC (+5V) — 15 —...

  • Page 18: To Mount Optional Circuit

    4-10. To mount optional circuit The following optional circuits are provided for this model CE6800. 1. Multi-drawer circuit 2. Paper near end circuit 1) Multi-drawer kit (Only Drawer 2) 1-1. Prepare the following parts kit for multi-drawer circuit. The parts kits are supplied from sales division. MDL-10 ------------- Multi-drawer kit 1-2.

  • Page 19: Diagnostic Operation

    5. DIAGNOSTIC OPERATION 5-1. To start the diagnostic program 1. Plug the power cord into an AC outlet. 2. Set the mode switch to "OFF" position. 3. While pressing the "Jounal feed " button, turn the mode switch to "PRG" position. 4.

  • Page 20: Switch Status Test

    5-4. Switch status test Press "C" button or changing the switch condition,the switch status is appeared on the transaction place of the display. The clerk key switch condition is showen at the 6 and 7 digit number's place of display. For the clerk button model, the pressed LED will light on.

  • Page 21: Individual Function Test

    #2 Key Function X: 0= Automatic RAM capacity detection 1= RAM1 (128K) test only NOTE : CE-6800 has the only RAM1 (128 K bytes). [PRINT] [DISPLAY] NOTE : In case of error, the following error message will be printed. RAM1 128K WR ERR!! 00 000000 ----------- When the write error is happened.
  • Page 22 2) Print aging test (R/J printer) This test will check the R/J printer continuously until pressing some key button or turn off the mode switch. Operation : n1 #2 Key Function X: 0= Print 45 times test pattern without paper cut in a minute. 1= Print 15 times test pattern with paper cut in a minute.
  • Page 23 4) Flash1 ROM check This test will check the Flash 1 ROM. This test will print the version name and check sum on the receipt as shown in sample print. When using several bank, the each version name and check sum will be printed after this sample data.
  • Page 24 6) RAM read only check This test will check the read only check for RAM. Perform the RAM check (EX: command "1 and #2 " ), before start of this operation. Operation : #2 Key Function X: 0= One time check. 1= Continuous check.
  • Page 25 8) RS232 port check This test will check the RS232 port. Connect the loop back connector before operate this check. Operation : #2 Key Function m: 0= One time loop check 1= Loop check continuously 2= One time loop check (Ignore the CD,CI signals. Only COM1 port) 3= Loop check continuously (Ignore the CD,CI signals.
  • Page 26 9) Print check This test will check the print test. Operation : #2 Key Function r: 0= One time check 1= Continuously check (NOTE1) s: 0= Receipt/Journal print mutually 1= Receipt print only 2= Journal print only NOTE1: To stop this test, press any key or set the mode switch to OFF position. [PRINT] [DISPLAY] 10) All charactor print check...
  • Page 27 NOTE: When use the command ptrint and display, press #1 key (Cash AMT tender key) to display and print the next line. To stop this test, press any key or set the mode switch to OFF position. [PRINT] [DISPLAY] 11) Time and date display test The machine will display the time .
  • Page 28 12) Date time set test The machine will set the time or the date. Opeartion : n1 n2 n3 n4 n5 n6 #2 Key Function X: 0= Time set (n1 n2: Time, n3 n4: Minute, n5 n6: Second) 1= Date set (n1 n2: Year, N3 n4: Month, n5 n6: Day) [PRINT] [DISPLAY] 13) COM1 online test...

  • Page 29: To Exit The Diagnostic Mode

    Test procedure 1) Operate the send machine first. The send machine will wait the "C" signal (send request) reception from the reception machine. The send machine will wait the send request signal about 30 seconds. When it is over 30 seconds, the time out error will be printed on the receipt.

  • Page 30: Ic Data

    6. IC DATA 1. BA10393F-E2 2. BA12003BF-E2 BA10393/BA10393F OUT1 OUT2 OUT1 OUT3 –IN1 OUT2 – OUT4 +IN1 –IN2 – OUT5 +IN2 OUT6 OUT7 3. HA17431PA – 2.500 V REF A TO-92MOD 4. HD74LVC374ATELL — 28 —...
  • Page 31 5. HIN211CA-T 6. HY628100ALLG-70 7. LC7932M-TE-R — 29 —...
  • Page 32 8. LH28F016SCT-L95A Type Name and Function INPUT ADDRESS INPUTS: Inputs for addresses during read and write operations. Addresses are internally latched during a write cycle. INPUT/ DATA INPUT/OUTPUTS: Inputs data and commands during CUI write cycles; OUTPUT outputs data during memory array. status register, and identifier code read cycles.
  • Page 33 9. LM2576HVT-5.0LB03 10.MTA001M-F4101 — 31 —...
  • Page 34 11.S-80823ANNP-EDL/S-80835ALNP-EAZ (2) CMOS active low output (1) Nch open drain active low output S-808XX AX XX - - T2 Tape spec. IC direction Production short No. Package No. NP: SC-82AB MP: SOT-23-5 UP: SOT-89-3 Y: TO-92 Output N: Nch open drain (Active "L") L: CMOS (Active "L") Detection Voltage X 10 times 12.SN74AHC1G00DCKR...
  • Page 35 14.SN74HC27PWR 15.SN74LV00APWR 16.SN74LV02APWR 17.SN74LV08APWR — 33 —...
  • Page 36 18.SN74LV138APWR 19.SN74LV139APWR — 34 —...
  • Page 37 20.SN74LV165APWR — 35 —...
  • Page 38 21.SN74LV165APWR 22.SN74LV174APWR — 36 —...
  • Page 39 23.SN74LV32APWR 24.SN74LV74APWR — 37 —...

  • Page 40: Pcb Layout

    7. PCB LAYOUT MAIN PCB (Front side) — 38 —...
  • Page 41 MAIN PCB (Back side) — 39 —...

  • Page 42: Circuit Diagram

    8. CIRCUIT DIAGRAM MODEL : CE-6800 (EX-475EP) CONTENTS 1. LOCATION OF PRINTED CIRCUIT BOARD ................40 2. MAIN PCB CIRCUIT ........................ 41 2-1. MAIN PCB CIRCUIT (1/6) ....................41 2-2. MAIN PCB CIRCUIT (2/6) ....................42 2-3. MAIN PCB CIRCUIT (3/6) ....................43 2-4.
  • Page 43 Model Name Drawing No. CE-6800 SYSTEM BLOCK DIAGRAM CASIO COMPUTER CO.,LTD. (EX-475P) E140329P...
  • Page 45 For CE6800, the Flash ROM2 is not used. RAM3 and RAM4 are option.
  • Page 49 DRW3 and DRW4 are not used.
  • Page 55 Voltage selector is not used for CE-6800.
  • Page 57 — 55 —...

  • Page 58: Parts List

    2. As for spare parts order and supply, refer to the “GUIDEBOOK for Spare Parts Supply”, published separately. 3. The numbers in item column corespond to the same numbers in drawing. 4. CASIO does not supply the spare parts without parts code. 5. Remarks Q'ty :...

  • Page 59: Explode View

    LED - Numeric LED PCB Blank — 57 —...
  • Page 60 Battery only For Drawer fix — 58 —...

  • Page 61: Main Pcb Block

    Item Code No. Parts name Specification Price code 1. Main PCB block 10049420 PCB ASSY/E475-1 E240672*9 30007777 FUSE 230.600 N IC10 10042378 UPD784215GC201-8EU N IC1 21145832 IC/MOS TA8429H IC12,20 10029099 IC/MOS SN74HC74APWR N IC40 21120819 HIN202CBN-T N IC39 21120820 HIN211CA-T IC18 10034262 HIN211EIA...

  • Page 62: Main Display Block

    Item Code No. Parts name Specification Price code 35802371 CONNECTOR B4P-VH 26523053 RESISTOR/METAL FILM ERX1ANJ5R6H N RA49-57 27975518 RESISTOR/CHIP NETWORK RAC1608-1014DJT N RA24,28,31,32,63 10005641 RESISTOR/CHIP NETWORK RAC1608-4704DJT RA1-10,21,22,25- 26601156 RESISTOR/CHIP NETWORK RAC1608-1034DJT 27,35,40,47,48,61,65 RA60 26601159 RESISTOR/CHIP NETWORK RAC1608-4724DJT RA64 10005679 RESISTOR/CHIP NETWORK RAC1608-3924DJT 30008096...

  • Page 63: Customer Display Block

    Item Code No. Parts name Specification Price code 35405184 CONNECTOR HFW10S-2STE1 35017728 CONNECTOR B14B-PHDSS 35405190 CONNECTOR SFW27R-5STE1 35405196 CONNECTOR HFW9R-1STE1 35405186 CONNECTOR HFW24R-1STE1 FB1-30 30450028 INDUCTOR BK1608HS601-T RA1-9 26523056 RESISTOR/CHIP NETWORK MNR34J5ABJ121 RA10,25-27 26601174 RESISTOR/CHIP NETWORK RAC1608-3314DJT RA11,19,22,23,28,29 26601156 RESISTOR/CHIP NETWORK RAC1608-1034DJT RA12-17,24 27975519...

  • Page 64: Power Supply Block

    Item Code No. Parts name Specification Price code 62481434 PLATE/S E240526-4 62481438 PLATE/S E240526-6 62481439 PLATE/S E240526-7 62482157 PLATE/S E240526A-69 10049310 PLATE/S E341153-1 10049311 PLATE/S E341153-2 10049312 PLATE/S E341153-3 10049313 PLATE/S E341153-4 10049314 PLATE/S E341153-5 10049315 PLATE/S E341153-6 10049317 PLATE/S E341153-7 10049318 PLATE/S...

  • Page 65: Clerk Switch Circuit

    Item Code No. Parts name Specification Price code 62481535 CABLE SUB ASSY/POWER E440715*1 F1,F2 10017415 CLIP/FUSE UF0033 10017404 FILTER PLA10A3021R3R02B1 30008061 COIL MCDR1419-221K 30008067 SWITCH/AC SDDJE3-R 30008062 SINK/HEAT OSH-3050-SPL 26523057 RESISTOR RD50SS102J 26523060 RESISTOR SN14K2C123F 26523059 RESISTOR SN14K2C132F 62481654 CASE/NF-U E445 E140265-1 62481279 CASE/NF-B...

  • Page 66: Printer Block

    Item Code No. Parts name Specification Price code 62481537 CONNECTOR SUB ASSY E440747*1 62213892 ROLLER/RP E233 E411377-1 62481489 CABLE SUB ASSY/DRAWER E440737*1 10047045 COVER/POW-SW E445 E340757A-1 62481530 PLATE/CON FIXING E340736-1 10012386 PLATE/D-SUB FIXING E340774A-1 55001980 SPACER/LOCKING SPLSN-4 62481500 CABLE/FFC JOINT E440657-1 55300526 TERMINAL...

  • Page 67: Printer (M-U420B-031)

    12. PRINTER (M-U420B-031) M-U420B NO.1 — 65 —...
  • Page 68 M-U420B NO.2 — 66 —...
  • Page 69 PARTS PRICE LIST M-U420B(031) Price Item Code No. Parts Name Specification code 1. DRIVING MECHANISM COMPONENTS 1909 2776 LEVER/FIXING J 1004032 1909 2777 SPRING/FIXING LEVER 1004033 1909 2775 LEVER/FIXING R 1004031 9487 0506 MAIN MOTOR ASSY 1049277 9487 0505 GEAR/MAIN MOTOR 1049273 1906 0719 WIRE/LEAD A 2021071...
  • Page 70 Price Item Code No. Parts Name Specification code 1906 0746 LEVER/STAMP TRANSMISSION 1028059 1906 0747 SPRING/STAMP FORCE ADJUSTMENT 1028063 1906 0748 LEVER/STAMP DRIVE 1028060 1906 0749 SPRING/STAMP RETURN 1028062 1906 0750 PLATE/VALIDATION STOPPER 1028036 1906 0751 GUIDE/VALIDATION 1028044 1906 0740 SCREW 1012350 1906 0740 SCREW 1012350...
  • Page 71 Price Item Code No. Parts Name Specification code 1906 0783 DETDCTOR ASSY/CUTTER 1028567 1906 0784 HOLDER SUB-ASSY/CUTTER BLADE 1028568 1906 0785 WIRE/LEAD I 2021079 1906 0786 WIRE/LEAD J 2021080 1906 0787 SPRING/CUTTER RELEASE 1028100 1906 0788 WASHER/PLANE 3X6X0.5 B100157411 1906 0789 GEAR/CUTTER TRANSMISSION #1 1028079 1906 0790 GEAR/CUTTER DECELERATION 1028078...

  • Page 72: Drawer

    13. DRAWER DL-2771 — 70 —...
  • Page 73 DL-2771 Item Code No. Parts name Specification Q'ty Price Code Rank 2 19061309 CHASSIS/BOTTOM 264D-1101 3 55000619 ROLLER/DERLIN DR-19-B1 4 55000878 ROLLER/DERLIN DR-19-B2 5 19079682 WASHER SW-M6 6 19077150 NUT HN-M6 7 19081339 BRACKET/LOCK 37A-B150 8 19061304 SOLENOID 262A-S153 9 94870398 SCREW CPS-M3X5 10 19064012 BRACKET/SHAFT GUIDE 37A-1503...
  • Page 74 CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan...

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