No.
Sensor Name/
Sensor Board Name
Activ
e
CN Condition Symptom
S13 Registration Sensor L CN224/A2
Open Jam A (Jam8, 17)
Shorted Jam A, B (Jam1)
S29
Drum Gear Position
Sensor-K
H CN222/A2
Open/
Shorted
SC380/SC396
S30
Drum Gear Position
Sensor-M
H CN222/ A5
Open/
Shorted
SC380/SC397
S31
Drum Gear Position
Sensor-C
H CN222/ A8
Open/
Shorted
SC380/SC398
S32
Drum Gear Position
Sensor-Y
H CN222/ A11
Open/
Shorted
SC380/SC399
S25
S26
S27
S28
Toner End Sensor - K
Toner End Sensor - Y
Toner End Sensor - C
Toner End Sensor - M
L
CN207/A1
CN207/B9
CN207/
B12
CN207/
B15
Open
Toner end cannot be
detected.
Shorted
Toner end is detected when
there is enough toner.
-
Image Transfer Belt
Rotation Sensor
H/L CN208/11
Open/
Shorted
SC443
S20
Vertical Transport Sensor
1
L CN230/A7
Open Jam A (Jam3, 11)
Shorted Jam A, B (Jam1)
S21
S24
Paper End
Sensor 1, 2
L
CN230/
A10, B10
Open
Paper end is not detected
when there is no paper in
the paper tray.
Shorted
Paper end is detected when
there is paper in the paper
tray.
S22
S25
Paper Lift Sensor 1, 2 H
CN230/
A13, B13
Open/
Shorted
SC501, SC502
7. Appendix: Electrical Component Defects
138
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