Electrical Component Defects; Sensors - Ricoh B121 Service Manual

ELECTRICAL COMPONENT DEFECTS

4.2 ELECTRICAL COMPONENT DEFECTS

4.2.1 SENSORS

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