Table Of Contents - Casio PCR-255 Service Manual

1. FEATURES................................................................................................... 1
2. SPECIFICATIONS ........................................................................................ 1
3. OPTION ........................................................................................................ 2
4. MAC OPERATION ....................................................................................... 2
5. BLOCK DIAGRAM ....................................................................................... 3
6. CIRCUIT EXPLANATIONS .......................................................................... 4
6-1. Power supply circuit ..................................................................................................... 4
6-2. Reset circuit ................................................................................................................. 5
6-3. Printer drive circuit ....................................................................................................... 6
6-4. Pin description ............................................................................................................. 6
7. DISASSEMBLY ............................................................................................ 8
7-1. To open the upper case ............................................................................................... 8
7-2. To remove the Main PCB ............................................................................................. 8
7-3. To remove the keyboard ass'y ..................................................................................... 8
8. DIAGNOSTOC OPERATIONS ..................................................................... 9
8-1. To start the diagnostic operation ................................................................................... 9
8-2. Check items .................................................................................................................. 9
8-3. Operations .................................................................................................................. 10
9. IC DATA ..................................................................................................... 13
9-1. LB1268 ........................................................................................................................ 13
9-2. S-80728AN-Z .............................................................................................................. 13
10. CIRCUIT DIAGRAM ................................................................................... 14
11. PCB LAYOUT............................................................................................. 23
12. PARTS LIST ............................................................................................... 24
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