Gestetner G060, Service Manual

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SC TABLE
G570 4-14 SM
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC201 Polygon motor
error
•
The polygon mirror motor
does not reach the
targeted operating speed
within 15 seconds after
turning on.
•
The lock signal does not
become low within 15
seconds after turning off
the polygon motor. .
•
Polygon mirror motor
error
•
Abnormal GAVD
behavior
•
Cable disconnection
1. Turn the main switch off and on.
2. Check the cables.
3. Replace the polygon motor. B
SC220 Synch. detection
signal error 1
220-1: Y
220-2: M
220-3: C
220-4: K0
220-5: K1 The front (for K&Y) or rear
(for C&M) laser
synchronizing detector
board, which is used to
determine the start timing of
laser writing, does not send
a signal while the polygon
motor is operating normally
and the LD is on.
•
Disconnection of the
cable between front
(K&Y) or rear (C&M)
synchronizing
detector board and
the LD unit
•
Incorrect installation
of front (K&Y) or rear
(C&M) synchronizing
detector board (the
beam does not target
the photo detector.)
•
Defective LD unit
•
Defective BCU
1. Turn the main switch off and on.
2. Check the cable connection between
front (for K&Y) or rear (for C&M)
synchronizing detector board and the
LD unit.
3. Check or reinstall the front (for K&Y)
or rear (for C&M) synchronizing
detector board.
4. Replace the front (for K&Y) or rear
(for C&M) synchronizing detector
board.
5. Replace the LD unit.
6. Replace the BCU.
B