Electrical Component Defects
D117/D118 6-104 SM
No.
Sensor Name/
Sensor Board Name
Active
CN No./
Pin No.
Condition Symptom
Shorted open cannot be
S18 PTR Contact Sensor L CN523/5
Open
 SC452
Shorted
S19 Registration Sensor L CN559/17
Open  Jam A (Jam 17)
Shorted  Jam B
S20 Scanner HP Sensor H CN104/5
Open
SC120, SC121
Shorted
S21
Temperature/Humidity
Sensor
A CN526/6,8
Open  Printed image is
wrong, such as
rough image,
dirty background
or weak image.
 SC498
Shorted
S22 TD Sensor (C) A CN539/22
Open
 SC374
Shorted
S23 TD Sensor (M) A CN539/23
Open
 SC373
Shorted
S24 TD Sensor (Y) A CN539/24
Open
 SC375
Shorted
S25
Waste Toner Overflow
Sensor
H CN543/4 Open
 Waste toner full
indicated when it
is not near full.
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