Ricoh A-P4 - Switches

Electrical Component Defects
Sensors
Component CN Condition Symptom
LD Unit Home Position
204-B2
(IOB)
Open
SC328 is displayed when the laser beam pitch is
changed.
Shorted
SC327 is displayed when the laser beam pitch is
changed.
Toner Density (TD)
222-11
(IOB)
Open
The Add Toner indicator blinks even if there is toner
in the development unit.
Shorted SC390 is displayed.
Paper Exit
202-B2
(IOB)
Open
The Paper Jam indicator lights whenever a print is
made.
Shorted
The Paper Jam indicator lights even if there is no
paper.
Registration
224-B2
(IOB)
Open
The Paper Jam indicator lights even if there is no
paper.
Shorted
The Paper Jam indicator lights whenever a print is
made.
Image Density (ID)
203-5
(IOB)
Open SC352 is displayed after printing.
Shorted SC350 is displayed after printing.
Upper Paper Height
220-2
(IOB)
Open
Add Paper is displayed even if there is paper. If this
condition occurred four times, SC501 will be dis-
played.
Shorted SC501 is displayed.
Lower Paper Height
214-2
(IOB)
Open
Add Paper is displayed even if there is paper. If this
condition occurred four times, SC502 will be dis-
played.
Shorted SC502 is displayed.
4. Troubleshooting
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