No.
Sensor Name/
Sensor Board Name
Active
CN No./
Pin No.
Condition Symptom
14
Paper Overflow
Sensor
H CN104/9
Open Paper overflow is
detected.
Shorted Paper overflow is not
detected.
15 Paper Exit Sensor L CN104/6
Open • Paper is not
detected.
• Jam C
Shorted • Paper is detected.
• Jam C
16 ID Sensor A
CN110/2, 5,
8, 11
Open
SC400
Shorted
17 Thermistor A CN125/5, 7
Open
SC554, SC544
Shorted
18
Pressure Roller
Thermistor
A CN125/9
Open
SC564
Shorted
19 Upper Cover Sensor L CN104/3
Open "Cover Open" is
displayed.
Shorted Top cover open cannot
be detected.
20 LSU Shutter Sensor L CN128/11
Open
SC290, SC291,
SC292, SC293
Shorted
21 Registration Sensor L CN129/16
Open • Paper is not
detected.
• Jam A
Shorted • Paper is detected.
• Jam B
6. Troubleshooting
630
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