Mita PointSource Ai 3010, Руководство по обслуживанию

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2AR
2-3-5
2-3-3 Scanner control PCB
MIP
IC17
CPU
IC5
EP-
ROM
IC7
SHD
IC11
SRAM
IC18
SRAM
IC19
Control signal
Clock signal
ADC
IC14
S/H
IC12
Image data
bus
8 bits (odd)
Image data
bus
8 bits (even)
ADC
IC13
SCPCB
MPCB
CCDPCB
SRDF*
SMPCB
Image data bus (8 bits)
Image control signals
Image signal
Driver
IC16
Image control signals
(differential transmission)
Image signal
(differential transmission)
Data bus
Address bus
Data bus
Data bus
Address bus
Address bus
SM control signals
EL control signals
SHPSW detection signal
Detection input signal
Control output signals
Op-
amp
IC21
Analog image
signal
(odd)
Analog image
signal
(even)
Buffer
IC10
Figure 2-3-3 Scanner control PCB block diagram
The scanner control PCB (SCPCB) consists of CPU IC5, MIP IC17, SHD IC11, and
EPROM IC7. In accordance with the control program in EPROM IC7, the CPU IC5
controls the scanner motor PCB (SMPCB), SRDF*, MIP IC17 and SHD IC11. SHD IC11
outputs clock signals to the CCD PCB (CCDPCB) to drive the CCD, which produces
analog image signals (odd and even) according to the scanned image. The analog
signals are converted to a digital image data by ADC IC13 and IC14 via operational
amplifier IC21 and S/H IC12, and fed to SHD IC11. The digital image data obtained is
processed by SHD IC11 and MIP IC17, serialized by driver IC16 in LVDS (Low Voltage
Differential Signaling), and then differentially transmitted to the main PCB (MPCB).
* Optional