OVERALL MACHINE CONTROL26 August 1998
1.4.3 SCB (SCANNER CONTROL BOARD)
G025V508.WMF
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
2. ADF mechanism (G036 only) control
3. CCD unit control
4. Operation panel control
5. Second printer interface
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 scanner motor, ADF motor (G036
only), CCD unit, and LCD display.
3. LC82103
This chip is an image processing LSI. It converts the analog signal from the
CCD unit to a digital signal.
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