Read Sharp AL-1566 (serv.man15) Service Manual online
AL-1556/1566 ELECTRICAL SECTION 12 - 3
(3) Image process ASIC (HG73C114HF)
a. General
The ASIC is composed of the three blocks: the image process block,
the print control block, and the I/F block.
the print control block, and the I/F block.
Image process section
According to the operation mode set by the register set value, the
image data from the CCD PWB are placed under shading, AE pro-
cess, input gamma process, area separation, filter process, resolu-
tion conversion, zoom process, output gamma process, and binary
coding.
image data from the CCD PWB are placed under shading, AE pro-
cess, input gamma process, area separation, filter process, resolu-
tion conversion, zoom process, output gamma process, and binary
coding.
Print control section
During copying, image-processed data are outputted to the LSU at
the timing of LSU writing.
the timing of LSU writing.
I/F section
This section performs DRUM control as image data buffer, image
data send/receive with the OA982, and data send/receive with the
IEEE1284 I/F.
data send/receive with the OA982, and data send/receive with the
IEEE1284 I/F.
106
ESPAGE
Input
E-sort control
107
SIN1
Input
HC151 select detection
108
SIN2
Input
HC151 select detection
109
SIN3
Input
HC151 select detection
110
Pull up
111
KEY IN
Input
NC
112
MSUST1
Input
NC
113
Avss
DGND
114
GND
DGND
115
/SCANSP
Output
Scan STOP signal
116
/SCANST
Output
Scan START signal
117
/TRANSST
Output
ASIC transfer signal
118
PMCLK
Output
Polygon clock
119
SPMT3
Output
SPF motor signal
120
SPMT2
Output
SPF motor signal
121
SPMT1
Output
SPF motor signal
122
SPMT0
Output
SPF motor signal
123
GND
DGND
124
GND
DGND
125
Vcc
CPU3.3V
126
PSL
Output
Power save LED control
127
/CS3
Output
Chip select signal
128
/CS2
Output
ASIC chip select
PIN
No.
Signal code
Input/
Output
Operating
nCS2
nRD
PORT1OUT[15..0]
nLWR
PORT2OUT[10..0]
A[9..1]
D[15..0]
OPE-LATCH
LED Driver
OPE-DATA
to OPU-PWB
nRESET
Control
OPE-CLK
JTAG
TONER MOTOR
TMCLK,TMEN
to TONER MOTOR DRIVER
Control
TM,TM-
to SDRAM
64Mb or 128Mb
64Mb or 128Mb
CCD-RS,CCD-CK1,CCD-CK2
to CCD(SCAN UNIT)
(Op.400MByte)
CCD-CP,CCD-SHR
bsmp,vsmp,mclk,OEB
afesen,afesck,afesdi
to AFE(SCAN UNIT)
to USB I/F
AFE-DB[7..0]
to IEEE1284 I/F
MIRCNT,MTR-Y1,MTR-PH-1,MTR-I01,MTR-I11,MTR-I21
MTR-Y2,MTR-PH-2,MTR-I02,MTR-I12,MTR-I22
to MIRROR MOTOR DRIVER
SYNC
to LSU-PWB
LD
to CCFL(Scan UNIT)
LEND
CL
CPUSYNC
I/O PORT
CPU BUS
I/F
Click on the first or last page to see other AL-1566 (serv.man15) service manuals if exist.