6.5. ELECTRICAL COMPONENT DEFECTS
6.5.1. Defective Sensor Table
Sensor
Status
Symptoms if Defective
ADF document sensor
ON
"CLEAR ORIGINAL" or "DIAL FAX NO" is
displayed at power-up.
OFF
"SET DOCUMENT" is still displayed after a
document is placed in the feeder.
ADF scan line sensor
ON
"CLEAR ORIGINAL" is displayed at power-up.
OFF
"CLEAR ORIGINAL" is displayed soon after
the start of copying.
ADF document width sen-
sor
ON
"CLEAR ORIGINAL" is displayed at power-up.
OFF
Only A4/Letter width can be scanned.
ADF cover switch
ON
No error message appears if the cover is
opened.
OFF
“CLOSE COVER” is displayed at power on.
ADF release switch
ON
No error message is displayed if the cover is
opened.
OFF
“CLOSE COVER” is displayed at power on.
Book scanner home posi-
tion sensor
ON
SC code 7-71 is displayed soon after starting
a copy operation. (Error code 9-11)
OFF
SC code 7-71 is displayed soon after power
on. (Error code 9-11)
Platen cover sensor
ON
(Open)
ADF does not work.
OFF
(Close)
The Automatic Paper Select function does not
work correctly. The original size is not reset
even if an original of a different size is placed
under the platen cover.
Book original size sensors
---
The Automatic Paper Select does not work
correctly.
Interlock switches
ON
There is no alarm on opening the cover, and
"CLOSE COVER" is not displayed.
OFF
"CLOSE COVER" is displayed at power-up.
Registration sensor
Fusing exit sensor
ON
"CLEAR COPY" is displayed at power-up.
OFF
"CLEAR COPY" is displayed after the start of
copying.
Bypass feed sensor
ON
"CLEAR COPY" is displayed after the
automatic reset timer expires.
OFF
Bypass feed cannot be used.
Toner end sensor
ON
“ADD TONER” is displayed.
OFF
Toner end is not indicated.
Paper size sensor - Stand-
ard cassette
---
"ADD PAPER" or the wrong paper size is
displayed at power-up.
---
Page separation may be done even if the
original is the same size as the copy paper.
May 22nd, 1995
TROUBLESHOOTING
ELECTRICAL COMPONENT DEFECTS
6-39