Component CN Condition Symptom
Vertical Transport Door
110-5
(BICU)
Open
The Cover Open indicator is lit even if the
vertical transport door is closed.
Shorted
The Cover Open indicator is not lit even if the
vertical transport door is opened.
Lower Paper Size
113-
1,2,4
(BICU)
Open The CPU cannot detect the proper paper size,
and misfeeds may
occur when a copy is made
from the 2nd paper tray.
Shorted
By-pass Paper Size
136-
1,2,4,5
(BICU)
Open
The CPU misdetects or is not able to detect the
size of the
paper set in the bypass tray, causing
possible misfeeds when feeding from this tray.
Right Door
124-5
(BICU)
Open
The Cover Open indicator is lit even if the right
door is closed.
Shorted
The Cover Open indicator is not lit even if the
right door is open.
Front/Right Cover
130-1
(BICU)
Open
The Cover Open indicator is lit even if doors are
closed.
Shorted
The Cover Open indicator is not lit even if doors
are open.
Main
281-3,
4
(PSU)
Open The machine does not turn on.
Shorted The machine does not turn off.
6. Troubleshooting
196
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