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18 May, 1999
2.3.3 SCB (SCANNER CONTROL BOARD)
Overall
The scanner control board (SCB) controls devices related to the scanner unit and
operation panel. The SCB contains a CPU (H8), peripheral control gate array
(GSPC), image processing LSI (LC82103), motor drivers, and an IEEE1284
connector for the second printer.
Functions
1. Flatbed scanner mechanism control (G027 only)
2. ADF mechanism control
3. CCD unit control
4. Operation panel control
5. Second printer connector
Contents
1. H8
This eight-bit CPU controls the SCB. It receives output from sensors.
2. GEPC
This chip contains an I/O port and it controls the scanner motor (G027 only),
ADF motor, CCD unit, and LCD.
3. LC82103
This chip is an image processing LSI. It converts the analog signal from the
CCD unit to a digital signal.
2-33
PCBS
G027D543.WMF
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