Gestetner G060 Service Manual page 496

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