Casio CE-T300, Service Manual

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CONTENTS
CE-T300 Page
1. SPECIFICATIONS ........................................................................................ 1
2. INITIALIZE (MAC) OPERATION .................................................................. 3
3. F-INIT (FMAC) OPERATION ....................................................................... 3
4. BLOCK DIAGRAM ....................................................................................... 4
5. TO OPEN THE UPPER CASE ..................................................................... 6
6. CIRCUIT EXPLANATION ............................................................................ 8
6-1. Power supply circuit .................................................................................................. 8
6-2. Reset and power down circuit ................................................................................... 9
6-3. CPU description ........................................................................................................ 10
6-4. Momory chip selection circuit ................................................................................. 12
6-5. Flash ROM1 address circuit .................................................................................... 13
6-6. Memory map ............................................................................................................. 13
6-7. Printer drive circuit ................................................................................................... 14
6-8. RS232C port COM1 circuit ....................................................................................... 15
6-9. Keyboard selection switch (Not mounted for CE-T300) ....................................... 15
6-10. Flash ROM pack circuit (Memory Cassette RAC-9) ............................................. 15
6-11. To mount optional circuit ....................................................................................... 16
1) Clerk key circuit ........................................................................................................ 16
2) Multi-drawer circuit .................................................................................................. 18
3) Paper near end sensor circuit ................................................................................. 19
7. DIAGNOSTIC OPERATION ....................................................................... 20
7-1. To start the diagnostic program ............................................................................. 20
7-2. Check item ................................................................................................................ 20
7-3. Operation of each test .............................................................................................. 20
7-4. Switch status test ..................................................................................................... 21
7-5. Individual function test ............................................................................................ 22
7-6. To exit the diagnostic mode .................................................................................... 32
8. ERROR CODE LIST ................................................................................... 33
9. IC DATA ..................................................................................................... 34
10. PCB LAYOUT ............................................................................................ 45
11. CIRCUIT DIAGRAM ................................................................................... 47
12. PARTS LIST ............................................................................................... 65