ELECTRICAL COMPONENT DEFECTS 30 November, 1999
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7.5 ELECTRICAL COMPONENT DEFECTS
7.5.1 DEFECTIVE SENSOR TABLE
Sensor Status Symptoms if Defective
Document sensor
ON The LCD displays "CLEAR ORIGINAL" or "DIAL
FAX NO" at power-up.
OFF The LCD still displays "SET DOC. OR DIAL
NO." after a document is placed in the feeder.
Scan line sensor
ON The LCD displays "CLEAR ORIGINAL" at
power-up.
OFF The LCD displays "CLEAR ORIGINAL" soon
after the start of copying.
Interlock switches
ON There is no alarm on opening the cover, and the
LCD does not display "CLOSE COVER".
OFF The LCD displays "CLOSE COVER" at power-
up.
Registration sensor
ON The LCD displays "CLEAR COPY" at power-up.
Paper edge sensor ON The LCD displays "CLEAR COPY" at power-up.
Fusing exit sensor ON The LCD displays "CLEAR COPY" soon after the
start of copying.
Toner end sensor ON The LCD displays "SET TONER" at power-up.
Paper end sensor -
standard cassette
ON The ADD PAPER indicator lights even if paper is
remaining.
Paper end sensor –
paper feed unit
ON The Add Paper indicator on the operation panel
of the lower cassette lights even if paper
remains.
Upper rear cover
switch
ON The LCD displays "CLOSE COVER" at power-
up.
Lower rear cover
switch
ON The LCD displays "CLOSE COVER" at power-
up.
7.5.2 BLOWN FUSE TABLE
The only service-replaceable fuses are the following.
Fuse Symptoms if Defective
PSU - F1/ F2/F3 The machine does not receive power
(F3 - 220V PSU only)