Block Diagram - Casio WK-3800 Service Manual

Phones/Output
CONSOLE PCB
(M740-CNA3)
Speakers
(R)
(L)
Power Amplifier
IC205, LA4636
IC204, NJM2008D
Main
Volume
CONSOLE PCB
IC204, NJM2008D
(M740-CNA2)
LOUT
MAIN PCB
(M740-MDA1)
Reset IC
RESET
IC6
R1151N001C-TR
EA0 ~ EA15, EA18
RAM (1Mbit)
IC5
CY62128DV30LL ED12 ~ ED19
16.384MHz
SI0 ~ SI9, FI0 ~ FI9
KC0 ~ KC7
Smart media Unit
Keyboard
CONSOLE PCB
(M740-CNA1)
Keyboard PCBs
(M764T-KY1M/
KY2M)

BLOCK DIAGRAM

SUB PCB (M740-PSA2)
Assingnable Jack
LINE OUT
L R
APO
Filter
Filter
ROUT
DAC IC1
uPD63200GS
MPU
IC13
uPD914AGM-JED
ARXD, ATXD, ZX-BUSYB,
SYSRSTB, BEND, MOD
KEY/BUTTON/SD CARD
CONTROLLER
IC20
TC190C020AF-001
Buttons
SWIO ~ SWI7
SWCO ~ SWC6
AC ADAPTOR
DC 12V
Battery
D214 D201
Power Supply Circuit
Q201 ~ Q204,
IC201, D205, D206
(9-12V) (5V) (5V) (5V)
VC VD5 VF5 VA5
MA0 ~ MA16, MA25
MA0 ~ MA13, MA25
A1 ~ A17 RAM (128 x 16bit)
IC23
LP62S16128BV
D0 ~ D15
PWSW
RESB
TXDO
TXDI
BUTTON/LED
CONTROLLER
IC301
UPD65881GK-1019ETA
— 3 —
LCD Controller
ML9040-B02GA (IC401)
CONT
E
LCD PCB
R/W
(M734-LCD1M)
RS
SUB PCB
(9-12V)
VCP
(M740-PSA1)
FLASH ROM (32MBit)
MA0 ~ MA20
IC11
MD0 ~ MD15
LH28F320BFHE
ROM (128Mbit)
MA0 ~ MA21
IC10
MD0 ~ MD15
MR27T12800LO
RAM (2Mbit)
IC7
MD0 ~ MD7
LP62S2048X-70LLT/Q
FDD Controller
IC21
MD0 ~ MD7
ML6757GA-115
3.5" FDD Unit
CONSOLE PCB
DSP
(M740-CNA4)
CONSOLE PCB
DRAWBER
(M740-CNA5)
CONSOLE PCB
DATA ACCESS
(M740-CNA6)
DB0 ~ DB7