BOARD STRUCTURE 15 February 2006
6-8
SBU (Sensor Board Unit)
The SBU receives analog signals from the CCD and converts these into digital
signals used for image processing.
PFC (Paper Feed Control)
Controls the paper feed trays built into the main machine. The PFC contains an
independent CPU.
SDRB (Scanner Driver Board)
Located behind the BCU, drives the scanner and ADF motors and exposure lamp,
monitors the scanner HP sensor and the ADF components.
VIB (Video Interface Board)
Located under the exposure glass, interfaces the BCU and IPU with the operation
panel and SBU.
DRB (Drive Board)
Drives the duplex stepper motors (x2), the registration motor, and lower relay
motor.
CNB (Connection Board)
Relays signals for the ADF, finishers, LCT, fusing exit, drum motor, development
motor, and front cover switches.
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