Block And Wiring Diagram - Casio LK-127 Service Manual & Parts Manual

KEYBOARD PCB
(M800-KYA1)
CN801 (13 pin)
KEYBOARD
CN802 (13 pin)
PCB
(M800-KYA2)
CN803 (16 pin)
CN1 (16 pin)
KI0~KI7
A0~A2
DB0~DB3
MPU
RESET
IC1
BUTTONS
VD5 VA5 VE5
VD5 VA5 VE5
KI4S~KI7S,
KO11S
POWER
SWITCH
D202
VCP
POWER OFF
CIRCUIT
Q201
POWER & AMP PCB (M820-PSA1)

BLOCK AND WIRING DIAGRAM

KEYBOARD LED PCB
(CSM446-LD5M)
JE (6 pin)
CN505 (6 pin)
KEYBOARD LED PCB
(M821-LDA2)
CN506 (16 pin)
CN2 (16 pin)
KO0~KO7 LY0~LY7, LX0~LX7
KEYBOARD LED
CONTROLLER
IC2
KI0S~KI7S,
KO8S~KO11S
CN3 (17 pin)
CN201 (17 pin)
SI1, SI2, SI4~SI6,
KI7S, SO1~SO6
BUTTONS
VD5 VA5 VC VE5
POWER SUPPLY
CIRCUIT
Q202, Q203, Q204,
D206, D207,
C225-C229
DC 9 V
KEYBOARD LED PCB
(CSM446-LD4M)
JF (6 pin)
CN504 (6 pin)
CN503 (12 pin)
VE5
RESET RESET IC
IC4
LCD
DB4~DB7
CONTROLLER
IC3
CN7
CN207
VOLUME
VCP
(J201)
– 2 –
KEYBOARD LED PCB
(CSM446-LD3M)
JG (6 pin)
CN504 (6 pin)
KEYBOARD LED PCB
(M821-LDA1)
CN501 (12 pin)
MAIN PCB
(M821-MDA1)
VD5
CN4
CN5
CN9
RSP-
RSP+
CN8
CN6
CN206
CN204
LSP-
LSP+
CN205
PHONES/OUTPUT
(J202)
POWER
AMPLIFIER
IC201
BATTERY
CN203 (+)
CN202 (-)
LK-127
LCD
RSP
RIGHT
SPEAKER
LEFT
SPEAKER
LSP