Casio WK-1800 Service Manual

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BLOCK DIAGRAM
BOK
Back Light Driver
TE-CFL733-IMI
Q601, Q602
ROM2
LHMN5KPN
LSI2 (32Mbit)
ROM1
LHMN5KPP
LSI1 (32Mbit)
RAM2
TC551001CFL-70L
LSI8 (1Mbit)
VBR VBR
VBR
AVDDAVCCDVDDFVDDCVDDVCC VDDVC
VDD
APO
NMI
SWCK
LSDT
CE1
IC6
LWR, RD CE1 HWR, RD
HWR
RD
RD, HWR, LWR
RD, HWR, LWR
RD, HWR, LWR
TEND, DREQ, CS2, CS3, 8/5
A0 ~ A15
KI0 ~ KI7
KC0 ~ KC7
SEG1 ~ SEG40
OUT
MIDI
IN
COM1 ~ COM16
LEDA ~ LEDH
LEDCK, LEDCL
D0 ~ D15
D0
D7
~
D8
D15
~
D8
D15
~
Chip Selector
TC74HC08
IC4
S-Register
TC74HC164
IC402
S-Register
TC74HC164
IC401
LCD
FDD Controller
HD63266F
LSI10
3.5" FDD Unit
DF354H064C
Back up
Power
CR2032
Power Supply Circuit
IC202, Q207
Q208, Q211, Q214,
Q215
Q209,
Q213
CPU
HD6433048SA89F
LSI9
Working
RAM
TC55257
GFL-70L
LSI4
(256Kbit)
LPF
(L)
LPF
(R)
D8 ~ D15 RESET
RESET
RD,
HWR
ECEB, EOEB
EWEB
RESB
RESB
PBO
LCD Driver
SED1278F2A
LSI601
LDB4
~LDB7
CONT,
LRS,
LR/L
LE
Keyboard
SI0 ~
SI9
FI0 ~
FI9
KC0
~
KC7
RAM1
TC551001CF-70L
LSI7 (1Mbit)
Key Controller
TC190C020AF-001
LSI6
Reset IC
RN5VD40A
IC5
Out put
(L) (R)
Speakers
LEDs
VDD
Buttons
A1 ~ A4
D0 ~ D15
RA0 ~ RA21
ED0 ~ ED8
EA0 ~ EA14
RD0 ~ RD15
Main
Volume
D/A Converter
µPD63200GS
LSI5
Power Amp.
LA4663
IC201
DSP
HG51B155FD
LSI3
A0 ~ A3
Back Light
SORP, SYOB, WOK1, BOK

Casio WK-1800 Specifications

General

Number of Keys	76
MIDI	Yes
Display	LCD
Effects	Reverb, Chorus
Weight	8.5 kg
Polyphony	32
Speakers	Yes
Power Supply	AC adapter or batteries
Floppy Disk Drive	Yes
Connections	Headphones, MIDI In/Out, Sustain pedal
Sequencer	6 tracks