Casio CTK-671 Service Manual

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BLOCK DIAGRAM
LCD Driver
CPU
(uPD914GM-3ED)
LSI1
RAM
(1Mbit)
UPD441000LGZ
LSI5
ROM
(32Mbit)
LSI3
RAM
(256kbit)
LSI4
IC11
FVDD
+5V
AVDD
+5V
DVDD
+5V
VCC
+9V
CLK
DO
WCK0
DAC
Filter
Main
Volume
Power Amp
Speakers
Keyboard
Key
Controller
Power supply Circuit
LSI2
Buttons
EA0 ~ EA16
ED12 ~ ED19
MA0 ~ MA3
CA0 ~ CA3
CD0 ~ CD15
FI8 ~ FI10
KI0 ~ KI2
KC0 ~ KC7
SI0 ~ SI7
FI0 ~ FI7
IC8
DB0
~
DB7
E
R/W
RS
Q1
CONT
IC4
IC5
MA0 ~ MA13,MA25
MA0 ~ MA20
VDD
+3.3V
MIDI IN
MIDI OUT
Reset
IC
MD0 ~ MD15
MD0 ~ MD7
CK0,LRC0,SC0,LRC1
DI
CLK
WCKIO
WCKI1
MSW0 ~ MSW3
MODE SWITCH
P10 ~ P13

Casio CTK-671 Specifications

General

Brand	Casio
Model	CTK-671
Category	Electronic Keyboard
Language	English