Casio CTK-620L Service Manual

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BLOCK DIAGRAM
KC0 ~ KC7
FI0 ~ FI7
SI0 ~ SI7
KI0 ~ KI2
MD0 ~ 3
L0
~ L20
L21
~ L23
MA0 ~ 2
PO10, PO17
PO22, PO23
PA4 ~ PA6
Working Storage
RAM (256K-bit)
LSI4
TC55257DFL-70L(EL)
MIDI
EA0 ~
EA14
EIO0 ~
EIO7
Sound Source ROM
(24M-bit)
LSI3
LH536PNV
LRCK
SO
BCK
D/A Converter
LSI6
UPD6379GR-E1
Filter
Q213 ~ Q216
Main
Volume
Power Amplifier
IC201
TA8229K
Keyboard
LED
Illuminant
MA0 ~ MA19
MCSB0
MCSB0, 1
MA19
Power Supply Circuit
Q201 ~ Q208,
D206 ~ 208, D210
VCC
AVDD
VDD VC
DVDD VLCCLVDDLCDD
APO
L OUTR OUT
Effect RAM
(256K-bit)
LSI5
TC55257DFL-
70L(EL)
MD0
~
MD7
Speakers
(L)
(R)
Phones/
Output
MA0
~
MA14
MA0,
MA1
LRCK, SO
BCK, SINK
LCD
LCD Driver
LSI401
SED1278F0A
SEG1 ~ SEG40
INOUT
Reset IC IC1
RN5VD40AA
Chip Selector
IC2,3
RESET
COM1 ~ COM16
DSP
LSI2
HG51B277FB-1
MD0 ~ MD15
Buttons
Assingnable Jack
PB4
VDD
Power Switch
NMI
LCBE
FI9
FI10
PA0, PA1
PB0 ~ PB3
LED
Driver
Q1 ~ Q11
LED
Driver
Q12 ~ Q14
CPU
LSI1
GT913F(T)
GA
LSI7
UPD65005
GF-419
ECEB
CE1B
RACEB
RDCEB

Casio CTK-620L Specifications

General

Brand	Casio
Model	CTK-620L
Category	Electronic Keyboard
Language	English