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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. Reset circuit ................................................................................................................ 9

5-3. Data communication between CPU and EEPROM ................................................ 10

5-4. Printer drive circuit................................................................................................... 12

5-5. Pin description (CPU uPD78043FGF) ..................................................................... 12

6. DIAGNOSTIC OPERATIONS .................................................................... 14

6-1. To start the diagnostic operation............................................................................ 14

6-2. Check items .............................................................................................................. 14

6-3. Operations................................................................................................................. 15

7. ERROR CODE LIST................................................................................... 19

7-1. Operation error code................................................................................................ 19

8. IC DATA ..................................................................................................... 20

9. PCB LAYOUT ............................................................................................ 21

10. CIRCUIT DIAGRAM ................................................................................... 22

11. PARTS LIST............................................................................................... 29

Casio 120CR Service Manual

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