Casio 120CR Service Manual
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Casio 120CR Service Manual

Printer model m-42v
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SERVICE MANUAL
INDEX
ELECTRONIC CASH REGISTER
120CR
160CR
SEP. 2000
(EX-268B)
(EX-268B)
Printer Model : M-42V
(without price)

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Summary of Contents for Casio 120CR

  • Page 1 SERVICE MANUAL (without price) ELECTRONIC CASH REGISTER 120CR (EX-268B) 160CR (EX-268B) SEP. 2000 Printer Model : M-42V INDEX...

  • Page 2: Table Of Contents

    CONTENTS 120CR 160CR Page 1. SPECIFICATIONS ..................1 2. INITIALIZE (MAC) OPERATION..............2 3. BLOCK DIAGRAM ..................3 3-1. PCB CONNECTION ..................... 3 3-1. BLOCK DIAGRAM ....................... 4 4. DISASSEMBLY .................... 5 5. CIRCUIT EXPLANATION ................8 5-1. Power supply circuit ....................8 5-2.

  • Page 3: Specifications

    1. SPECIFICATIONS 1-1. Electrical specifications 120 V 220 V 230 V 240 V • Power consumption In operation Max. 0.11 A 0.05 A 0.06 A 0.06 A Min. 0.07 A 0.04 A 0.05 A 0.05 A Power OFF 0.06 A 0.03 A 0.04 A 0.04 A...

  • Page 4: Initialize (Mac) Operation

    1-4. Drawer List DRAWER NAME Specification NOTE • DL-1838 (S type) Europe, UK, Germany, Other countries • DL-2768 (M type) Europe, UK, Other countries 1-5. Option List DEVICE NAME MODEL NOTE • Wet cover WT-80 • INK ROLL IR-40 CAUTION Danger of explosion if battery is incorrectly replaced.

  • Page 5: Block Diagram

    3. BLOCK DIAGRAM 3-1. PCB CONNECTION E 2 6 6 - 1 — 3 —...

  • Page 6: Block Diagram

    3-2. BLOCK DIAGRAM Memory Protection E266-1 PCB battery Voltage 32.768 4.19MHz RESET IC Winder BUZZ Buzzer Motor DI,DO EEPROM RP,PT,Pt CE ,SK Printer PMO,PHD Sa~Sg,G1~G9 Operator Display Drawer Customer Display Mode Keyboard — 4 —...

  • Page 7: Disassembly

    4. DISASSEMBLY 1. Open the printer cover. 2. Remove the screw from the upper case. Remove the screw. 3. Slide the upper case towards front side. 4. Lift up the upper case. — 5 —...
  • Page 8 5. Open upper case by lifting it from the left side. 6. Remove all the cables on Main PCB and remove 3 screws. Remove 3 screws. Hook Hook Push the connector. Pull the wires. 7. Lift up the Main PCB to the right side to avoid the destruction of Display tube.
  • Page 9 7. To remove the Printer unit, release the hook of point B, then lift up the Printer unit. Point B — 7 —...

  • Page 10: Circuit Explanation

    5. CIRCUIT EXPLANATION 5-1. Power supply circuit 1. Plug the power cord into AC outret. The secondary voltage(9.65VAC) will be appeared at the power transformer T1.("A" point) 2. Then, its AC voltage is rectified by the diode bridge and change it to DC voltage.("B" point) 3.

  • Page 11: Reset Circuit

    C N 8 A C IN AC I N G N D H OT CN 3 B - 2 B -3 C -2 V F 2 DISP1 C - 3 D - 3 F - 1 F - 2 C1 7 C 1 6 C- 3 µPD 78 043 AGF...

  • Page 12: Data Communication Between Cpu And Eeprom

    5-3. Data communication between CPU and EEPROM (NOT USED FOR USA MODEL) EEPROM Pin No.23 CS : Chip enable Pin No.14 SK : Sirial data clock BR93LC46A DI : Serial data input Pin No.15 DO : Serial data outpu Pin No.16 EEPROM is a memory to possible write/erase by electricity .
  • Page 13 [Data reading procedure] When the CPU reads the data of EEPROM, CPU sends the CS signal and SK signal to EEPROM. Then, CPU sends the address to EEPROM, and then EEPROM sends the data to CPU. Address Data Output data here [Data writing procedure] When the CPU saves the data to EEPROM, CPU sends the CS and SK signal to EEPROM.

  • Page 14: Printer Drive Circuit

    5-4. Printer drive circuit Pin No.44 Pin No.45 Pin No.47 Pin No.62 Pin No.63 When the CPU starts printing, CPU sends MD signal to rotate motor unit. Then the printer sends back the RP(reset pulse),PT and PT (Timing pulse) to CPU. After CPU receives RP,PT andPT, CPU knows the position of printin wheel.
  • Page 15 Mode SW Mode SW AC cord Pin No. Signal In/Out Description Plug off 41 P32/TO2 Mode switch position (REG) 42 P31/TO1 Mode switch position (RF) 43 P30/TO0 Mode switch position (PRG) 44 P03/INTP3/CI0 In Reset pulse RP from printer 45 P02/INTP2 Pulse Sub timimg pulse Pt from printer 46 P01/INTP1...

  • Page 16: Diagnostic Operations

    6 DIAGNOSTIC OPERATIONS 6-1. To start the diagnostic operation 1. Make MAC operation. 2. Turn the mode switch to PGM position. 3. Input "99999999" and press "SUB TOTAL" key. Note : Do not issue the receipt under REG / RF / X / Z mode before execute the diagnostic. If the machine issued a receipt, the diagnostic does not start.

  • Page 17: Operations

    6-3. Operations 1. Key code check (Hard key code) When pressing a key, the machine displays the following key code. Key code table FEED Display 0 2 2 022 : Hard key code 2. Switch check Press " C " button, the switch condition is appered on a display. Always 0 No display No display...
  • Page 18 3. Individual test After finishing each test, the machine issues the following receipt. Except US / Canada US / Canada d1 # d1 : Test command No. Sample receipt 1234567890ST# 1. General test Press "1" key and "SUB TOTAL" key. The machine executes the following tests.
  • Page 19 4. Read only test for EEPROM (This test is effected at EEPROM version.) Press "4" key and "SUB TOTAL" key. Execute read check in test area of EEPROM continually. To escape this test, turn the mode switch to "OFF". In case an error happens, the machine beeps an error sound and issues an error receipt. Nomal end receipt Error end receipt Except US...
  • Page 20 8. Country code write operation for EEPROM (ADD data) Press "X", "6" and "SUB TOTAL" keys. Write the country code to EEPROM. Note 1 : "X" key is country code. Note 2 : Japan version is accepted code "06" Japan and "96".

  • Page 21: Error Code List

    7. ERROR CODE LIST 7-1. Operation error code Error codes appear on display whenever you make a mistake during operation. Error Code Meaning Action Changing modes without completing transaction. Return key to where is stops buzzing and press CA AMT TEND Printer paper is jammed.

  • Page 22: Ic Data

    8. IC DATA 8-1. LB1268 Equivalent circuit OUT1 OUT2 OUT3 6.8k 6.8k 8-2. S-80728AN-Z 1 OUT – Bottom view — 20 —...

  • Page 23: Pcb Layout

    9. PCB LAYOUT AC IN AC IN DISP1 µ PD78043AGF C-11 B-10 C-21 C-22 C-15 C-16 C-23 C-17 C-18 B-14 C-19 C-20 E266-1 LBI268 B-15 — 21 —...

  • Page 24: Circuit Diagram

    10. CIRCUIT DIAGRAMS MODEL : 120CR (EX-268B) 160CR (EX-268B) CONTENTS 1. LOCATION OF PRINTED CIRCUIT BOARD ..............23 2. MAIN PCB CIRCUIT 2-1. MAIN PCB CIRCUIT (1/3) ..................24 2-2. MAIN PCB CIRCUIT (2/3) ..................25 2-3. MAIN PCB CIRCUIT (3/3) ..................26 3.
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  • Page 29 Description: Board No. Drawing No. REAR DISPLAY E266-1E2 E440054 — 27 —...
  • Page 30 — 28 —...

  • Page 31: Parts List

    11. PARTS LIST CONTENTS Exploded view ..........................30 11-1. MODEL : 120CR (EX-268B) Main PCB block ......................... 32 Button block ........................32 Power supply block ......................33 Upper case block ....................... 33 Printer block ........................33 Others ..........................33 11-2. MODEL : 160CR (EX-268B) Main PCB block .........................
  • Page 32 E266-1 Ass'y Drawer — 30 —...
  • Page 33 Keyboard Block — 31 —...

  • Page 34: Main Pcb Block

    PARTS PRICE LIST 120CR Europe Europe Other UK S Germany Price Item Code No. Parts Name Specification countries Rank Drawer S Drawer code Drawer Drawer M Drawer 1. Main PCB block 1 1002 9835 PCB ASSY /E268-1 E140376*6 1 1002 9841 PCB ASSY /E268-1...

  • Page 35: Power Supply Block

    Europe Europe Other UK S Germany Price Item Code No. Parts Name Specification countries Rank Drawer S Drawer code Drawer Drawer M Drawer 23 6246 7810 KEYTOP/S E311101A-4 24 6247 3830 SPRING/COIL E411104A-1 25 6248 0990 RUBBER/CONTACT E411877A-1 26 6247 3837 SPRING/COIL E411104A-2 27 1001 8612 SHEET/COMMON E341006-1...

  • Page 36: Main Pcb Block

    PARTS PRICE LIST 160CR Europe Europe Other UK M Germany Price Item Code No. Parts Name Specification countries Rank Drawer S Drawer code Drawer Drawer M Drawer 1. Main PCB block 1002 9832 PCB ASSY /E268-1 E140376*3 1002 9839 PCB ASSY /E268-1 E140376*10 1002 9840 PCB ASSY /E268-1 E140376*11...

  • Page 37: Power Supply Block

    Europe Europe Other UK M Germany Price Item Code No. Parts Name Specification countries Rank Drawer S Drawer code Drawer Drawer M Drawer 6245 7310 BUTTON/8 E311792-7 6245 7320 BUTTON/9 E311792-8 6245 7330 BUTTON/0 E311792-9 6245 7340 BUTTON/. E311792-10 6245 7350 BUTTON/00 E311792-11 6245 7360 BUTTON/5 E311116-4...

  • Page 38: Drawer : Dl-1838 (S Type)

    11-3. Cash drawer (DL-1838 (S type)) 10 x2 — 36 —...
  • Page 39 PARTS PRICE LIST DL-1838 Item Code No. Parts Name Specification Q'ty Price Code Rank 10029541 DRAWER ASSY E240689*2 62481217 HOLDER/BILL E340725-1 62465220 SPRING/BILL HOLDER E412160-1 SCREW ZMC-3.. 55000878 ROLLER/DERLIN DR-19B2 51501643 NUT 6... 54400287 RIVET/FLAT 5X26 55801452 RING/CS CSTW-5 62464960 CYLINDER LOCK ASSY E311950*1 62465000 DRAWER KEY SUB ASSY E412062*1...
  • Page 40 Cash drawer (DL-2768 (M type)) — 38 —...

  • Page 41: Dl-2768 (M Type)

    PARTS PRICE LIST DL-2768 N Item Code No. Parts Name Specification Q'ty Price Code Rank 61926329 DRAWER ASSY E311955*1 51501652 SCREW 3.5X8 ZMC-3... 52000106 RIVET/FLAT 5X30 53015018 WASHER 6X13X1 ZMC-3 55000619 ROLLER/DELRIN DR-19B1 62214900 LOCK/CYLINDER ZD20025 62464950 DRAWER SUB ASSY E311927*1 62465030 SPRING/EARTH E412092-1...

  • Page 42: Printer : M42V

    11-4. Printer Unit. M-42V — 40 —...
  • Page 43 Item Code No. Parts Name Specification M Price Code 1903 0201 Rubber fitting F801001050 1908 7661 Motor F818051010 1908 7662 Motor gear F817051010 1908 7663 Cup screw M2x2.9 B040352118 1908 7664 Paper feed drive gear ass'y F815101000 1908 7665 Detector ass'y F815151000 1903 2244 Detection wheel...
  • Page 44 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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160cr

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