Electrical Components
Scanner Unit
No. Component Function
1 Safety switch A push-switch that detects when the scanner cover is open
and disables machine operation. This prevents the CIS from
switching on while the cover is open
2 CIS unit Five CIS elements that transfer scan image signals from CIS
LEDs to the SIF
3 Scanner motor Drives the original feed roller and original exit roller that
feed the original through the scanner unit
4 SIB Scanner Interface Board. This is the board that controls the
scanner, and serves as the signal I/F board between the
IPU and MCU.
5 Original Exit Sensor Detects the leading and trailing edges of the original as it
leaves the scanner unit. Signals a jam if the edges are not
detected within the prescribed time.
6 Original stop switch Halts original feed after the operator presses this on the
operation panel to stop feeding because the original has
skewed or wrinkled.
6. Troubleshooting
744
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