ELECTRICAL COMPONENT DEFECTS 17 January, 2003
4-64
4.5 ELECTRICAL COMPONENT DEFECTS
4.5.1 SENSORS
Component CN Condition Symptom
Open SC261
LD H.P. sensor 220-B12
Shorted SC260
Open SC370/371/372/373
TD sensor
K: 210-A3
C: 210-B9
M: 209-A19
Y: 210-A9
Shorted
SC370/371/372/373 or
SC374/375/376/377
Open
Shorted
Transfer belt
sensor
210-A12
Shorted
SC471
Open
ID sensor
Rear: 215-12
Center: 215-13, 16
Front: 215-17
Shorted
SC385
Open
The Paper End indicator lights even
if paper is placed in the paper tray.
Paper end sensor
Tray1: 205-A5
Tray2: 205-B7
By-pass: 209-A15
Shorted
The Paper End indicator does not
light even if there is no paper in the
paper tray.
Open
The bottom plate of the paper feed
unit is not lifted up.
Paper lift sensor
Tray1: 205-A2
Tray2: 205-B4
Shorted SC501/502
Open
Paper Jam is detected whenever a
print is made.
Relay sensor 205-A8
Shorted
Paper Jam is detected even if there
is no paper.
Open
Paper Jam is detected whenever a
print is made.
Vertical transport
sensor
208-B11
Shorted
Paper Jam is detected even if there
is no paper.
Open
Paper Jam is detected whenever a
print is made.
Registration
sensor
209-B2
Shorted
Paper Jam is detected even if there
is no paper.
Open
Paper Jam is detected whenever a
print is made.
Fusing exit sensor 212-A7
Shorted
Paper Jam is detected even if there
is no paper.
Open
Paper Jam is detected whenever a
print is made.
Paper exit sensor 212-B4
Shorted
Paper Jam is detected even if there
is no paper.
Open
The paper overflow message is not
displayed even when a paper
overflow condition exists, causing
paper jam.
Paper overflow
sensor
212-A2
Shorted
The paper overflow message is
displayed.
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