Service manual

WRITE UNIT
2-D-4
2 UNIT EXPLANATION
[4] Image Write Control
The analog image data from the CCD sensor is A/D-
converted by the ADB (A/D converter board), then sent
to the ICB (image control board) for data processing.
The processed image data is converted into a laser
beam according to the control signal received from the
ICB through the ICB IFB (ICB I/F board), then the beam
is radiated onto the drum surface. Two lasers are pro-
vided to write two lines of image data per scan. The
write start position is detected by the INDXSB (index
sensor board). The ICB has an E-RDH (electronic
RDH processing) function to store digitized data. Var-
ious editing functions can be performed based on this
data.
INDEXSB
ICB
LDB1
LDB2ICB IFB
ADB
M24 PWR A
M24 PWR B
M24 DRIVE A
M24 DRIVE A’
M24 DRIVE B
M24 DRIVE B’
5VDC
SGND
M INDEX 1
SGND
M INDEX 2
SGND
S INDEX1
SGND
S INDEX 2
SGND
HL VL
IPR
SGND
5VDC
SGND
LD1 SH
LD1 ENB
LD1 VIDEO
SGND
LD1 ALM
LD1DCLK
LD1 DI
LD1 LD
LD1 PR
5VDC
SGND
LD2 SH
LD2 ENB
LD2 VIDEO
SGND
LD2 ALM
LD2 DCLK
LD2 LD
LD2 AD
LD2 PR
M24
5VDC
SGND
DCPS1
24VDC
PGND
DCPS2
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