Casio CASSIOPEIA A-20 Service Manual & Parts List page 3

POWER SUPPLY CIRCUIT ------------------------------------------------------------------- 35
Primary Circuit---------------------------------------------------------------------------- 35
5 V Circuit ---------------------------------------------------------------------------------- 36
3 V Circuit ---------------------------------------------------------------------------------- 37
PCMCIA Circuit --------------------------------------------------------------------------- 38
LCD power Circuit ----------------------------------------------------------------------- 39
Voltage Line ------------------------------------------------------------------------------- 40
DETECTOR CIRCUIT --------------------------------------------------------------------------- 41
DIAGNOSTIC PROGRAM --------------------------------------------------------------------- 42
Introduction-------------------------------------------------------------------------------- 42
OPERATION CHECK --------------------------------------------------------------------------- 43
IrDA Communication Test ------------------------------------------------------------ 48
Current Consumption and Voltage Detectors Check ------------------------ 50
Voltage Detectors Check -------------------------------------------------------------- 52
DISASSEMBLY • ASSEMBLY --------------------------------------------------------------- 54
1.Module ------------------------------------------------------------------------------------ 54
2.Upper case ass'y ---------------------------------------------------------------------- 55
3.Removal of touch panel and LCD unit ----------------------------------------- 57
4.Precautions when installing LCD unit------------------------------------------ 60
5.Installation of shaft piece----------------------------------------------------------- 61
6.How to pass FPC through the upper case ------------------------------------ 62
7.Precautions when assembling---------------------------------------------------- 63
EXPLOED VIEW --------------------------------------------------------------------------------- 65
PARTS LIST --------------------------------------------------------------------------------------- 66
WIRING DIAGRAM ------------------------------------------------------------------------------ 68
PCB VIEW ----------------------------------------------------------------------------------------- 69
SCHEMATIC DIAGRAMS --------------------------------------------------------------------- 70
Z340-1 PCB 1/3 (MAIN) ----------------------------------------------------------------- 70
Z340-1 PCB 2/3 (POWER SUPPLY) ------------------------------------------------ 71
Z340-1 PCB 3/3 (DP I/F BLOCK)----------------------------------------------------- 72
Z370-ROM PCB (ROM) ----------------------------------------------------------------- 73
Z340-DPMI PCB (MIC) ------------------------------------------------------------------ 74
Z340-LED PCB (LED) ------------------------------------------------------------------- 75
KEY MATRIX------------------------------------------------------------------------------- 76
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