Block And Wiring Diagram - Casio WK-240 Service Manual & Parts Catalogue

KEYBOARD PCB (M709-KYA1)
CN801 (13 pin)
MAIN PCB
CN4 (13 pin)
(M822-MDA1)
Filter
IC5
VD3
Power Supply Circuit
VD5
IC6, C24, C25, C27,
C33, C35, C183
POWER & AMP PCB
(M829-PSA1)
ADIN
POWER
SWITCH
VD5 VA5
VC VA3
Power Supply Circuit Power
Q4, Q6, Q7, C35~C37, Supply Circuit
C40, C109, D4, D5 IC3, Q4, D1
D1
VCP
D3
DC (J2)

BLOCK AND WIRING DIAGRAM

CN802 (10 pin)
FI0~FI3,
SI0~SI3,
KC0~KC4
PEDAL (J1)
LOUT, ROUT
MPU
LSI1
AUDIO IN/MIC,
ADIN, APO,
VA5
STBY_CTL
CN1 (11 pin)
CN14 (11 pin)
MIC VOL. (VR2)
Filter
IC4
AUDIO IN (J3)
APO
LOUT
ROUT
CN7 (+)
BATTERY
CN8 (-)
KEYBOARD PCB (M709-KYA2)
CN803 (10 pin)
FI4~FI9,
SI4~SI9,
KC5~KC7
CN8 (4 pin)
CN2 (10 pin)
CN16 (10 pin)
Controller/Driver
MIC IN (J4)
MAIN VOL. (VR3)
Filter
IC3
PHONES (J1)
– 3 –
CN804 (15 pin)
CN5 (15 pin)
USB (CN8)
MA1~MA19
SRAM
(4 Mbit)
LSI4
MD0~MD15
MA1~MA23
Flash Memory
(128 Mbit)
LSI3
MD0~MD15
DB4~DB7, ARXD,
E, R/W, RS, NMI ATXD
CN7 (5 pin)
CN20 (5 pin)
LCD
Button Controller
IC1
IC5
LCD
BUTTONS
Power
SPEAKER (L)
Amplifier
IC2
CN9 (-)
CN10 (+)
CN15 (+)
CN17 (-)
SPEAKER (R)
WK-240