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FilmScan 200
2.3 CONTROL CIRCUIT
The scanner's control circuit is consists of two boards.
2.3.1 Control Circuit Outline
The scanner CPU is an 16-bit, single chip M37720S1AFP, which operates at 14.74 MHz. To simplify the
circuitry, the circuits for correcting the image data signals are collected into ASIC E02A14 and M6415.
Figure 2-14 is a block diagram of the control circuitry.
Scanner
Image
Head
Data
CCD
Lamp
2-10
A/D
Con-
AMP
verter
(IC2)
CCD and
Lamp
Control
Motor
Driver
(IC13, 26)
Preview Motor,
Main Scan Motor
Figure 2-14. Control Circuit Block Diagram
1M PSRAM
(IC5, 6)
GA
1M
E02A14
ROM
(IC4)
(IC11)
CPU
HD6413003
(IC8)
APS Holder
(Option)
1M
RAM
(IC10)
M64154
(IC16)
Parallel
SCSI
I/F
Rev. A
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