Read Sharp MX-B381 / MX-B401 (serv.man9) Service Manual online
MX-B381/B401 BLOCK DIAGRAM 1 – 5
5. LSU MOTHER PWB
LSU_ASIC
(Racoon)
MFP
BD
(BD/
TH)
Horizontal
Scan
/Vertical Scan
Timing Control
Motor Control
PCU
S/S
ECLK
HSYNC
LVDS/Driver
ECLK
HSYNC
VSYNC _K
VIDEO I/ F CK
HSYNC
ECLK
HSYNC
VSYNC
8
SYSCLK
PCU I/F
Register
etc...
SCK
RSV_DAT
TRANS_RST
TRANS_DAT
JOBEND_INT
Synchronous Serial
communication
Thermistor Output
OSC
(System CK)
AMP
Reset
IC
Reset Input
Reset
35 : 5
ID[0:0]
Channel A: K1
Channel B: K2
Channel C:
Channel D:
LD
Polygon
Motor
Control
PGM_CK
PGM_START
(PGM_BRAKE)
PGM_LOCK
Polygon
Motor
FAN
Control
O. C.
O.C.
Serial
D/A
Serial I/F
DA_CLK
DA_DT
DA_LD
DA_LD
Vref K1, K2
Serial
D/A I/F
LD Control
LD Control
(APC
/ENB)
nSH K1,K2
LD _ENB K
LD5V
LDERR K
3
3
2
2
VIDEOIF_ACT
DT_K1+-
2
DT_K2+-
2
LD _CHK 1/2/ 3/4
4
BD
OSC
(CK C)
OSC
(CK M)
OSC
(CK A)
OSCCLK_C
OSCCLK_M
OSCCLK_A
CLK_C_EN
CLK_M_EN
CLK_A_EN
CLK_C_EN
CLK_M_EN
CLK_A_EN
Thermistor
4
PIC
PIC16F882
MFP
SCN
cnt
DCPS
LVDS
(OPE)
Reset
IC
Reset Input
Reset
UART
O.C
.
POF_MFP
POF_SCN
POF
O.C.
DCCNT1
O.C.
DCCNT2
UART
UART
LCD_DATA0-3 +-
/LCD_CLK+-
10
SCN_DATA0-3 +-
/SCN_CLK+-
10
LCD_DISP
USB Port
(Front)
USB
SW
O. C.
POW_LED
O. C.
WU_LED
PWR_KEY
WU_KEY
INFO_LED
O.C.
WU_FAX
LCDCLK
33.26MHz
LCD_CLKIN
PICVPPON
OSC
(System CK)
O. C.
TXD_PIC/RXD_PIC
REQ_PIC/REQ_PIC_INT/CLR_PIC
TXD_SCN/RXD_SCN/CTS_SCN/RTS_SCN/RES_SCN
LCD_SEL0-3
TXD _PCU
RXD_PCU
CTS _PCU
RXD_PCU
CTS _PCU
RTS _PCU
RES _PCU
RES _PCU
FPD-LINK/Receiver
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