Block Diagram - Casio AP-25 Service Manual

PEDAL
ANI0 ~ 2
Reset IC
RN5VD2BAA
IC 13
uPD703107AGJ103UEN
ROM (4MB)
MR27V3202E-81MA
LSI 2
RAM (128KB)
CY62126BVLL-55ZI
LSI 4
Power Switch
Voltage
Selector
Power
Transformer
T101
Power Supply

BLOCK DIAGRAM

MIDI
IN OUT
M-IN M-OUT
CPU
LSI 6
MA0 ~ 20
MD0 ~ 15
uPD914AGM-3ED
EA0 ~ 15
ED4 ~ 19
+5V
IC401: NJM78M05FA
+15V
IC402: NJM78M15FA
Keyboard
3VD0 ~ 15
Controller
TC190C020AF
CA1 ~ 4
LSI 1
3VD0 ~ 15
CA1 ~ 16
Mute
CA1 ~ 5
DSP
LSI 3
SP
VDD
AVCC
— 3 —
Keyboard
KC0 ~ 7
FI0 ~ 10
SI0 ~ 10
RAM (128KB)
CY62126BVLL-55ZI
LSI 5
3VD0 ~ 15
SYCK
BCK
WCK
D/A Converter
PCM69BU/2K
IC 2
Filter
IC1, IC405, IC406
Main
Volume
Power Amp.
LM4765T
IC403
HEADPHONE
SP