FujiFilm CR-IR341 Service Manual page 109

C 1 2
ONTENTS
7.12 Scanning Optics/Scanner Unit
Summary
The SCN08A board controls the LDD08A board (laser diode control board), SYN08A board
(start-point detection board), polygon driver, the photomultiplier's PMT08A board (LOG
amp), and SED08A board (leading-edge detection board) located in the scanning optics/
scanner unit.
An analog image signal sent from the PMT08A board is transferred to the IMG08A board as
digital image data that is analog-to-digital converted by the SCN08A board.
Image signal
HV noise error
HV status signal
Erasure level signal
HV control signal
Quasi-read
control signal
Start-point
detection signal
Leading-edge
detection signal
Control bus signal
Scanning Optics/Scanner Unit Block Diagram
009-051-04
05.31.99 FM2460
3 4 5 6
Analog
signal
processing
Correction
signal
Shading
correction
Control
Erasure
signal
level
detection
Control
signal
HV control
Quasi-read
control
Sync signal generation
Control bus I/F
Power
supply
unit
CR-IR341 Service Manual
7 8 9 10
Image data
A/D Image bus
conversion I/F
Polygonal facet
signal
Polygon
control
Laser
control
To each I/O
Analog –15V
Analog –5V
Digital +5V
Power system +24V
MD - 46
Image data
Image block
Polygon control signal
Index signal
Status signal
LD control signal
LD status
FR1H0239.EPS
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