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6.5. ELECTRICAL COMPONENT DEFECTS
6.5.1. Defective Sensor Table
Sensor
Symptoms if Defective
Document sensor
"CLEAR ORIGINAL" or "DIAL FAX NO" is
displayed at power-up.
"SET DOCUMENT" is still displayed after a
document is placed in the feeder.
Scan line sensor
"CLEAR ORIGINAL" is displayed at power-
up.
"CLEAR ORIGINAL" is displayed soon after
the start of copying.
Interlock switches
There is no alarm on opening the cover,
and "CLOSE COVER" is not displayed.
"CLOSE COVER" is displayed at power-up.
Registration sensor
Fusing exit sensor
"CLEAR COPY" is displayed at power-up.
"CLEAR COPY" is displayed soon after the
start of copying.
Bypass feed sensor
Bypass feed cannot be used.
Toner end is not indicated.
Paper size sensor - Standard cassette
"ADD PAPER" is displayed at power-up.
Page separation may be done even if the
original is the same size as the copy paper.
Paper end sensor - Standard cassette
The Add Paper indicator lights even if paper
is remaining.
The Add Paper indicator does not light
when the paper has run out.
Paper size sensor - 100 sheet cassette
"ADD PAPER" is displayed at power-up.
Page separation may be done even if the
original is the same size as the copy paper.
Paper end sensor - 100 sheet cassette
The Add Paper indicator on the lower
cassette’s operation panel lights even if
paper is remaining.
The Add Paper indicator on the lower
cassette’s operation panel does not light
when the paper has run out.
6.5.2. Blown Fuse Table
The only service-replaceable fuses are the following.
Fuse
Symptoms if Defective
PSU - F1/ F2/F3
No power to the machine
(F3 - 220V PSU only)
Thermofuse (Not installed in the US model.)
Fusing power is not supplied.
August 2nd, 1995
TROUBLESHOOTING
ELECTRICAL COMPONENT DEFECTS
6-37