Ricoh D143 Field Service Manual page 910

6. Troubleshooting
Sensor Name/
No.
Sensor Board Name
Drum Gear Position
S33
Sensor-Y
S26 Toner End Sensor - K
S27 Toner End Sensor - Y
S28 Toner End Sensor - C
S29 Toner End Sensor - M
Image Transfer Belt
S34
Rotation Sensor
Vertical Transport
S19
Sensor 1
S20 Paper End
S24 Sensor 1, 2
S21
Paper Lift Sensor 1, 2
S25
Vertical Transport
S23
Sensor 2
S14
Tray 1 Paper Height
Sensor 1, 2
S15
S16
Tray 2 Paper Height
Sensor 1, 2
S17
Tray 1 Paper Feed
S18
Sensor
908
Activ
CN Condition
e
Open/
H CN222/ A11
Shorted
CN207/B14
Open
CN207/B3
CN207/
L
B9
Shorted
CN207/
B6
Open/
H/L CN206/3
Shorted
Open
L CN230/A7
Shorted
Open
CN230/
L
A10, B10
Shorted
CN230/ Open/
H
A13, B13 Shorted
Open
L CN230/B7
Shorted
CN224/ Open/
L
B2, B5 Shorted
CN224/ Open/
L
B10, B13 Shorted
Open/
L CN230/A4
Shorted
Symptom
SC390-04/SC396-04
Toner end cannot be
detected.
Toner end is detected
when there is enough
toner.
SC443
Jam A (Jam3, 11)
Jam A, B (Jam1)
Paper end is not detected
when there is no paper in
the paper tray.
Paper end is detected
when there is paper in the
paper tray.
SC501, SC502
Jam A (Jam4, 12)
Jam A, B (Jam1)
Remaining paper volume
on the LCD is wrong.
Remaining paper volume
on the LCD is wrong.
Jam A, B