Defective Sensor Table - Ricoh FACSIMILE FAX77 Field Service Manual

5-5. Defective Sensor Table

Sensor
Document sen-
sor (SB-1)
Scan line sensor
(SB-2)
Trailing edge
sensor (SB-0)
Printer jam sen-
sor (SB-5)
Paper end sen-
sor (SB-4)
Cutter sensor
(SB-7)
Cover switch
(SB-10)
Symptoms if shorted
"PAGES:00 KPAD/N", "DEPTCODE 0000
KPAD/N", or "QUICK/SPEED/KPAD" are
displayed even if no document is present.
At power up, the default contrast, resolu-
tion, and reception mode indicators blink.
Operation appears normal.
At power up, a paper cycle is made, then
CLEAR COPY is displayed even if there is
no jam.
At power up, a paper cycle begins even if
there is no paper, but it fails and CLEAR
COPY is displayed.
At power up, a paper cycle is made, then
the cutter motor rotates a few times, then
CLEAR COPY is displayed.
CLOSE COVER is not displayed even if the
cover is opened.
Symptoms if open
"READY SET DOCUMENT" remains
displayed even if a document is
present.
A document jam occurs half-way
through feeding the first page.
Tx/copying is normal until the end.
However, the machine does not send
an end of page signal (the other ter-
minal does not cut the paper be-
tween pages).
At power up, a paper cycle is made
but the paper is not cut, and CLEAR
COPY is displayed.
The Replace Paper indicator lights at
power up, even if paper is present
At power up, the cutter motor starts
immediately and rotates a few times.
CLOSE COVER is displayed even if
the cover is closed.
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