Name: Casio CASSIOPEIA A-20
Brand: Casio
Rating: 4 (1 reviews)

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— 56 —

Terminal holder

K-spacer

5. Remove the terminal wire, then remove the main board.

6. When you replace K-film (35), stick K-spacer (34) on the “ON” key on new K-film.

* This is to prevent from accidentaly turning the computer off.

4. Unscrew two screws (30) to remove the terminal holders. Remove both battery terminal.

Table of Contents2
Hardware Specifications4
- General Specifications4
- Electrical Specifications5
Accessories6
Options6
System Configuration7
General Guide8
Adjusting Display Contrast9
Desktop Computer System Configuration10
Setting up10
Replacing Batteries12
- To Replace the Main Batteries12
- To Replace the Backup Battery13
Reset14
- To Reset the CASSIOPEIA14
Full Reset15
- To Perform a Full Reset15
Connecting to a Desktop Computer16
- To Connect to a Desktop Computer16
Replacing the Pc Card17
- To Replace the PC Card17
Replacing the Compactflash Card18
- To Replace the Compactflash Card18
Connecting to External Equipment19
- To Connect External Equipment19
Memory Backup / Restore20
- Backup20
- Restore22
Block Diagram24
Device Features25
Lsi/IC Data27
- Sh-7093 (Cpu / Ic1)27
- MB87A915 (Gate Array/Ic3)30
- Mc34119 (Ic9)35
- Max3241Cai (Ic5)35
- Upd42S16160Lg536
- Rn5Vd18Ca (Ic113)36
- XC61A Series (IC100 ~ IC103,IC107,IC109,IC110,IC112)36
- Max608 (Ic105,Ic106)37
- Emi Filter Array37
- Upd23C32000Lgy37
Power Supply Circuit38
- Primary Circuit38
- Circuit39
- Circuit40
- PCMCIA Circuit41
- LCD Power Circuit42
- Voltage Line43
Detector Circuit44
Diagnostic Program45
- Introduction45
Operation Check46
- Irda Communication Test51
- Current Consumption and Voltage Detectors Check53
- Voltage Detectors Check55
Disassembly • Assembly57
- Module57
- Upper Case Ass'y58
- Removal of Touch Panel and LCD Unit60
- Precautions When Installing LCD Unit63
- Installation of Shaft Piece64
- How to Pass FPC through the Upper Case65
- Precautions When Assembling66
Exploed View68
Parts List69
Wiring Diagram71
Pcb View72
Schematic Diagrams73
- Z340-1 Pcb 1/3 (Main)73
- Z340-1 Pcb 2/3 (Power Supply)74
- Z340-1 Pcb 3/3 (Dp I/F Block)75
- Z370-Rom Pcb (Rom)76
- Z340-Dpmi Pcb (MIC)77
- Z340-Led Pcb (Led)78
- Key Matrix79

Brand	Casio
Model	CASSIOPEIA A-20
Category	Handhelds
Language	English

Casio CASSIOPEIA A-20 User Manual

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Casio CASSIOPEIA A-20 Specifications

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