Casio CTK-900 Service Manual

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BLOCK DIAGRAM
RAM (1Mbit)
IC2
CY62128VLL-70AZI
Reset IC
IC4
R1151N001C-TR
RESET
16.384MHz
EA0 ~ EA15,EA18
ED12 ~ ED19
MA0 ~ MA20
MD0 ~ MD15
CONT
Speakers
(L)
(R)
Phones/Output
Filter
IC202, IC203
DAC IC3
µPD6379LGR-E1
Power Amplifier
IC201
LA4636
LOUT
ROUT
ROM (128Mbit)
IC8
MR27V12800J137TN3D
RAM (1Mbit)
IC12
CY62128VLL-70AZI
MD0 ~ MD15
MA0 ~ MA15, MA25
MA0 ~ MA23, MA25
MD0 ~ MD7
MA1 ~ MA3
MD0 ~ MD15
KEY/BOTTON
CONTROLLER
IC13
TC190C020AF-001
KC0 ~ KC7
SI0 ~ SI7
FI0 ~ FI7
Keyboard
MIDI
PEDAL
Assingnable Jack
Q207
D209
IN
OUT
LCD Controller
ML9040-B02GA (IC501)
Power Supply Circuit
Q201 ~ Q205, D201,
D204, D205
(9V)
VC
(5V)
VD5
(5V)
VA5
(9V)
VCP
APO
ADIN
Battery
APO Cancellation
AC Adaptor
DC 9V
D201
MA0 ~ MA21
Main
Volume
CONSOLE PCB
(M705-CN2M)
Keyboard PCB
(CSM618T-KY1M/KY2M)
CONSOLE PCB (M705-CN1M)
SUB PCB (M707-MA2)
MAIN PCB (M707-MD1)
LCD PCB
(M705-LCD1M)
MPU
IC10
uPD914AGM-3ED
NMI, KI0 ~ KI2, FI8 ~ FI0, KC0 ~ KC7
LD14 ~ LD16, LD20 ~ LD22
Buttons

Casio CTK-900 Specifications

General

Brand	Casio
Model	CTK-900
Category	Electronic Keyboard
Language	English