Block Diagram - Casio CPS-85 Service Manual

Sound Source ROM
(8M-bit)
LSI3
MX23C1610MC-12
MA0, MA1
EA0 ~
Effect RAM
(256K-bit)
LSI5
TC55257DFL-70L EIO0 ~
Output
Speakers

BLOCK DIAGRAM

Working Storage
RAM (64K-bit)
LSI2
HY6264ALLJ-70
MA0 MD0
~ ~
MA12 MD7
MD0 ~ MD15
MA1 ~ MA19
DSP
EA14
LSI1
HG51B277FB
EIO7
LRCK SO
D/A Converter
LSI6
UPD6379GR
Rmel
Filter
IC104
Main
Volume
Pre. Amp.
IC103
Power Amplifier
IC101
LA4620
MIDI
OUT IN
KI0 ~ KI2
CPU
LSI4
GT913F
BCK, SO, LRCK
SONGA
SONGB
DIGITAL EFFECT
SELECT
BCK
STOP
Lmel
POWER (APO)
From CPU
Line In
Line Out
— 3 —
Buttons
FI0 ~ FI10
SI0 ~ SI10
Keyboard
KC0 ~ KC7
Reset IC
RN5VD35AA
LEDs
VDD
VDD VCC AVDD AVCC
Power Supply Circuit
Q101 ~ Q106
D108, D110, D111
6 D-size batteries
AC adaptor AD-12
IC 1
LVDD