Service manual

30 July, 2001 ELECTRICAL COMPONENT DEFECTS
4-49
Trouble-
shooting
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:208-A3
Y:208-B10
M:207-A19
C:208-A9
Shorted
SC370/371/372/373 or
SC374/375/376/377
Open
Transfer belt set
sensor
208-B2
Shorted
SC471
Open
Transfer belt H.P.
sensor
212-2
Shorted
SC471
Open
ID sensor
Rear:213-11
Front:213-14
Shorted
SC385
Open
The Paper End indicator lights even if
paper is placed in the paper tray.
Paper end sensor
Tray1:202-A5
Tray2:202-B7
By-pass:207-
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
Tray1:202-A2
Tray2:202-B4
Shorted SC501/502
Open
Paper Jam is detected whenever a
print is made.
Relay sensor 202-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
202-B10
Shorted
Paper Jam is detected even if there is
no paper.
Open
Paper Jam is detected whenever a
print is made.
Registration
sensor
207-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 210-A11
Shorted
Paper Jam is detected even if there is
no paper.
Open
Paper Jam is detected whenever a
print is made.
Paper exit sensor 210-B2
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.
Exit upper limit
sensor
210-A6
Shorted
The paper overflow message is
displayed.
The CN numbers are the connector numbers on the BCU.