No.
Sensor Name/
Sensor Board Name
Active
CN No./
Pin No.
Condition Symptom
S8 Fusing Thermopile A CN525/13
Open
• PCU setting Error
occurs.
Shorted
S9 HST Sensor (K) A CN539/14
Open
Shorted
S10 HST Sensor (C) A CN539/15
Open
Shorted
S11 HST Sensor (M) A CN539/16
Open
Shorted
S12 HST Sensor (Y) A CN539/16
Open
Shorted
S13 ID Sensor A CN555
Open
• SC370
Shorted
S14 ITB Contact Sensor L CN543/12
Open
• SC442
Shorted
S15 Paper End Sensor H CN559/12
Open
• Paper end is
detected when
there is paper in the
paper tray.
Shorted
• Paper end is not
detected when
there is no paper in
the paper tray.
S16 Paper Feed Sensor H CN559/14
Open • Jam A.
Shorted • Normal operation
S17 Platen Cover Sensor L CN104/2
Open
• Platen cover open
cannot be
Shorted
Electrical Component Defects
723
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