Casio CTK-680, Руководство по обслуживанию

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BLOCK DIAGRAM
KC0 ~
KC7
SI0 ~ SI7
FI0 ~ FI7
Key Controller
LSI16
HG52E35P
Working Storage RAM
(256K-bit)
LSI15
TC55257DFL-70L
KO1 ~ KO4, KO8
LED Driver
IC301
BA612
LD0 ~
LD7
Buttons
KI1 ~ KI4
Power Switch
IN
EA0 ~ EA14
ED0 ~ ED7
DSP
IC11
HG51B155FD
RA0 ~ RA20
RD0 ~ RD15
Sound Source ROM
(24M-bit)
LSI12
MX23C2410MC-12CA54
WCK1 SLOP BCK
D/A Converter
IC11
UPD6376GS
Filter
Q208
Main
Volume
Power Amplifier
IC202
LA4598
CPU
LSI14
HD6433294A33F
Keyboard
A0 ~ A14
NMI
Power Supply Circuit
IC203, Q201 ~ Q206
VCC
AVDD
VDD
LVDD
DVDD
VC
Effect RAM
(256K-bit)
LSI13
LC33832M-70
D0~D7
Speakers
Output
A0 ~
A14
A0 ~ A3
A0 ~ A2
7-seg. LED
LEDs
LED Driver
Q15 ~ Q18
Gate Array
LSI17
UPD65611GB-019
La ~ Lg, Lp
LC1 ~ LC4, LC8
MIDI
OUT
KOC
KOD
CLK
KO0 ~
KO9
Filter
Q207
RES
Reset IC
IC13
RH5VL36AA