Casio fz 20m service manual
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Extracted text from casio fz 20m service manual (Ocr-read)
Page 2
CONTENTS
SCHEMATIC DIAGRAM
1. PCB M5307-MA1M (1/2) ..................................... 1 (Appendix)
2. PCB M5306-MA2M ......................................... 2
3. PCB M5306-MA5M ......................................... 3
4. PCB M5306-PSZM .......................................... 4
5. PCBs M5306~CN1, 2., 3, 4, 5 ................................... 5
6. PCB M5306- MA3M ......................................... B
PCB VIEW ...................................................... 7
PCB WIRING .................................................... 8
SELF DIAGNOSTIC PROGRAM
OUTLINE OF DIAGNOSTIC PROGRAM ............................. 9
SYSTEM ROM/RAM CHECK ....................................... 9
| BUILT-IN PROGRAM
1. BUILT-IN PROGRAM STARTING ............................. 10
2. FDD UNIT CHECK ......................................... 11
3. FDD UNIT ADJUSTMENT ................................... 13
4. LCD UNIT CHECK ......................................... 14
DIAGNOSTIC FLOPPY DISC
1. STARTING OF DIAGNOSTIC PROGRAM ...................... 15
2. WAVE MEMORY RAM CHECK (1) ............................ 16
3. SWITCH CHECK ........................................... 17
4. KEYS, SENSORS, AND VR CHECK ........................... 18
5. MIDI CHECK .............................................. 18
6. EXTERNAL PORT CHECK .................................. 19
7. FDD READ/WRITE AGING TEST ............................. 20
8. DISK COPY ............................................... 21
9. RANDOM DISK CHECK ..................................... 21
10. ON BOARD KEY .......................................... 22
11. WAVE MEMORY RAM CHECK (2) ............................ 23
12. HARD DISK CHECK ....................................... 24
13. FDD FULL CHECK 2 ...................................... 24
CIRCUIT EXPLANATION
BLOCK DIAGRAM ............................................ 26
CPU (pPD70216) .............................................. 27
CPU RESET CIRCUIT ......................................... 28
SYSTEM ROM/RAM
1. System ROM/RAM Access ................................. 29
2. System ROM/RAM Chip Selection ........................... 30
LED LATCH (74LS174) ........................................ 31
CHIP SELECTOR ............................................. 31