Casio CTK-691 Service Manual

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BLOCK DIAGRAM
MIDI
RAM (1Mbit)
IC2
CY62128VLL-70AZI
PEDAL
Assingnable Jack
Reset IC
IC4
R1151N001C-TR
RESET
16.384MHz
EA0 ~ EA19
ED12 ~ ED19
MA0 ~ MA20
MD0 ~ MD15
Q207
D209
Filter
IC202, IC203
DAC IC3
µPD6379LGR-E1
Main
Volume
Power Amplifier
IC201
LA4636
Power Supply Circuit
Q201 ~ Q206, D201,
D204, D205, D207, D208
(9V)
VC
(5V)
VD5
(5V)
VA5
(9V)
VCP
APO
ADIN
Battery
APO Cancellation
Speakers
(L)
(R)
Phones/Output
LOUT
CONT
ROUT
AC Adaptor
DC 9V
Keyboard
Buttons
FLASH ROM (16MBit)
IC5
LH28F160BJHE-BTL90
RAM (1Mbit)
IC12
CY62128VLL-70AZI
ROM (64Mbit)
IC8
MR27V6402G01BTNZ04
MA0 ~ MA21
MD0 ~ MD15
MD0 ~ MD15
MA0 ~ MA15, MA25
MA0 ~ MA23, MA25
MD0 ~ MD7
MA1 ~ MA3
MD0 ~ MD15
CPU
IC10
uPD914AGM-3ED
KEY/BOTTON
CONTROLLER
IC13
TC190C020AF-001
KC0 ~ KC7
SI0 ~ SI7
FI0 ~ FI7
FI8 ~ FI10, FI0 ~ FI7, KI0 ~ KI2,
LD14 ~ LD16, LD20 ~ LD22
LCD Controller
ML9040-B02GA (IC501)
IN
OUT
D203
MA0 ~ MA20

Casio CTK-691 Specifications

General

Brand	Casio
Model	CTK-691
Category	Synthesizer
Language	English