Ricoh B121 - Electrical Component Defects; Sensors

ELECTRICAL COMPONENT DEFECTS
B121 Series/B259 Series 4-12 SM
4.2 ELECTRICAL COMPONENT DEFECTS
4.2.1 SENSORS
Component CN Condition Symptom
Open
The Paper Jam message will appear whenever
a copy is made (paper hasn't reached the
sensor).
Registration
111-2
(BICU)
Shorted
The Paper Jam message appears even if there
is no paper at the sensor.
Open
The Paper Jam message will appear whenever
a copy is made except for 1st and by-pass tray
feeding.
Relay
111-5
(BICU)
Shorted
The Paper Jam message appears even if there
is no paper at the sensor.
Open
The Paper End indicator lights when the 1st
paper tray is selected, even if there is paper in
the tray.
Upper Paper End
114-2
(BICU)
Shorted
The Paper End indicator does not light when
the 1st 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 1st
paper tray.
Open
The Paper Jam message will appear whenever
a copy is made from an optional paper tray unit.
Vertical
Transport
110-2
(BICU)
Shorted
The Paper Jam message appears even if there
is no paper at the sensor.
Open
The Paper End indicator lights when the 2nd
paper tray is selected, even if there is paper in
the tray (B122/B123 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 (B122/B123 models only).
Lower Paper End
113-6
(BICU)
Shorted
Open
The Paper End indicator lights when the bypass
tray is selected, even if there is paper in the
tray.
By-pass Paper
End
136-7
(BICU)
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.
Open
The Paper Jam message will appear whenever
a copy is made (paper hasn't reached the
sensor).
Exit
124-2
(BICU)
Shorted
The Paper Jam message appears even if there
is no paper at the sensor.
Open Toner Density
125-3
(BICU)
Shorted
SC390 is displayed.
Open Image Density
123-2
(BICU)
Shorted
The toner density control process is changed
(see the note below the table).