Casio AP-20 Service Manual

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POWER
VOLUME
MIN MAX
HALL 2
BRILLIANCE
MELLOW BRIGHT
CONTROL
PIANO 1
TONE
PIANO 2 E.PIANO HARPSICHORD PIPE ORGAN STRINGS CHOIRVIBRAPHONE W.BASS E.BASS
LOWER TONE
REVERB
HALL 1
STAGE
ROOM
TREMOLO
CHORUS
SONG A
MEMORY
SONG B RECORD
START/
STOP
TUNE DEMO
OFF
ON
MA2M
MA1M
PS1
CN2M CN1M
CN3M
IF1M
MA4M MA5M
TP10-KY1M TP10-KY2M
PCB LAYOUT
Note: IF1M PCB is a terminal board for the keyboard PCBs, and included in the main PCB.
PCB
Main PCB
Jack PCBs
Console PCBs
Power PCB
JCM433-
MA1M
MA2M
MA4M
MA5M
CN1M
CN2M
CN3M
PS1
Components
CPU, DSP, Sound Source ROM Working storage
RAM, Effect RAM Reset IC, DAC, Filter, Key con-
troller, Power amp, Power supply circuit
LINE IN/OUT jack, MIDI jacks
Phone jacks
Power indicator
Gate array (Button controller/LED driver), LEDs,
Buttons
Main Volume, Brilliance volume
Tune Buttons, Demo button
Fuse, Noise filter

Casio AP-20 Specifications

General

Brand	Casio
Model	AP-20
Category	Musical Instrument
Language	English