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Casio TK-T500 Series User manual

SERVICE MANUAL
ELECTRONIC CASH REGISTER
(without price)
TK-T500(EX-579A*)
APR. 2000
Printer Model : LTP4242B-C432
Casio TK-T500 service ManualCasio TK-T500 service Manual
CONTENTS
TK-T500 Page
1. SPECIFICATIONS........................................................................................ 1
2. INITIALIZE (MAC) OPERATION.................................................................. 4
3. F-INIT (FMAC) OPERATION ....................................................................... 4
4. BLOCK DIAGRAM....................................................................................... 5
5. TO OPEN THE UPPER CASE ..................................................................... 7
6. CIRCUIT EXPLANATION ............................................................................ 9
6-1. Power supply circuit .................................................................................................. 9
6-2. Reset and power down circuit................................................................................. 10
6-3. CPU description........................................................................................................ 11
6-4. Momory chip selection circuit................................................................................. 13
6-5. Flash ROM1 address circuit .................................................................................... 14
6-6. Flash ROM2 circuit ................................................................................................... 14
6-7. Flash Pack circuit (Memory Cassette RAC-9)........................................................ 15
6-8. Memory map ............................................................................................................. 16
6-9. Printer drive circuit................................................................................................... 17
6-10. RS232C port COM1 circuit...................................................................................... 17
6-11. RS232C port COM2 and COM3 circuit ................................................................... 18
6-12. Keyboard selection switch ..................................................................................... 19
6-13. To mount optional circuit ....................................................................................... 19
1) Clerk key circuit........................................................................................................ 19
2) Multi-drawer circuit .................................................................................................. 21
3) Paper near end sensor circuit ................................................................................. 22
6-14. Display controller uPD78015FGC526-AB8 ............................................................ 23
6-15. Segment display driver uPD16312GB-3B4............................................................ 24
6-16. DC/DC convertor circuit.......................................................................................... 25
6-17. ARCNET circuit (IO-PB14) ...................................................................................... 25
7. DIAGNOSTIC OPERATION....................................................................... 31
7-1. To start the diagnostic program ............................................................................. 31
7-2. Check item ................................................................................................................ 31
7-3. Operation of each test.............................................................................................. 31
7-4. Switch status test ..................................................................................................... 32
7-5. Individual function test ............................................................................................ 33
7-6. To exit the diagnostic mode .................................................................................... 49
8. ERROR CODE LIST................................................................................... 50
9. IC DATA ..................................................................................................... 53
10. PCB LAYOUT ............................................................................................ 67
11. CIRCUIT DIAGRAM ................................................................................... 69
12. PARTS LIST............................................................................................... 93
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