Component CN Condition Symptom
Lower Paper End
113-6
(BICU)
Open
The Paper End indicator lights when the 2nd
paper tray is selected, even if there is paper in
the tray (B277/B269/B244 models only).
Shorted
The Paper End indicator does not light when the
2nd paper tray is selected, even if there is no
paper in the tray. The Paper Jam message will
appear whenever a copy is made from the 2nd
paper tray. (B277/B269/B244 models only).
By-pass Paper End
136-7
(BICU)
Open
The Paper End indicator lights when the bypass
tray is selected,
even if there is paper in the tray.
Shorted
The Paper End indicator does not light when the
bypass tray is
selected, even if there is no paper
in the tray. The Paper Jam message will appear
whenever a copy is made from the bypass tray.
Exit
124-2
(BICU)
Open
The Paper Jam message will appear whenever
a copy is made (paper has not reached the
sensor).
Shorted
The Paper Jam message appears even if there is
no paper at the sensor.
Toner Density
125-3
(BICU)
Open
SC390 is displayed.
Shorted
Image Density
123-2
(BICU)
Open
The toner density control process is changed (see
the note below the table).
Shorted
Scanner H.P.
102-2
(BICU)
Open
SC120 shows.
Shorted
Platen Cover
102-5
(BICU)
Open
APS and Auto Reduce/Enlarge do not function
correctly.
Shorted
If the Start button is pressed with the platen cover
or A(R) DF
closed, “Cannot detect original size”
is displayed.
6. Troubleshooting
194
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