Electrical Component Defects; Sensors - Ricoh Aficio AP2700 Service Manual

1 October, 1999

7.4 ELECTRICAL COMPONENT DEFECTS

7.4.1 SENSORS

NOTE: The CN numbers describes the connector number on the engine board.
Component
(Symbol)
Toner Density
1st Paper End
2nd Paper End
Image Density
Paper Over Flow
Paper Exit
Upper Relay
Lower Relay
Registration
1st Paper Lift
2nd Paper Lift
CN Condition
Open
302-3
Shorted
Open
306-2
Shorted
Open
307-2
Shorted
Open
321-3
Shorted
Open
324-5
Shorted
Open
324-2
Shorted
Open
306-5
Shorted
Open
307-5
Shorted
Open
321-6
Shorted
Open
305-7
Shorted
Open
305-10
Shorted
7-15
ELECTRICAL COMPONENT DEFECTS
Symptom
SC390 is displayed
The Paper End indicator lights even if
paper is placed in the 1st paper tray.
The Paper End indicator does not light
even if there is no paper in the 1st paper
tray.
The Paper End indicator lights even if
paper is placed in the 2nd paper tray.
The Paper End indicator does not light
even if there is no paper in the 2nd paper
tray.
SC392 is displayed (see note)
The paper overflow message is not
displayed when the paper overfull
condition exist.
The paper overflow message is
displayed.
The Paper Jam indicator will light
whenever a print is made.
The Paper Jam indicator lights even if
there is no paper.
The Paper Jam indicator will light
whenever a print is made.
The Paper Jam indicator lights even if
there is no paper.
The Paper Jam indicator will light
whenever a print is made.
The Paper Jam indicator lights even if
there is no paper.
The Paper Jam indicator will light
whenever a print is made.
The Paper Jam indicator lights even if
there is no paper.
SC501 will be displayed.
Paper jam will occur during printing.
SC502 will be displayed.
Paper jam will occur during printing.