Ricoh J-P2 Service Manual page 134

SC TABLE
SC No. Item
SC 201 Polygon motor • The polygon mirror motor
error
• The lock signal does not
• The lock signal does not
SC 220 Synch. The front (for K&Y) or rear (for
detection signal C&M) laser synchronizing
error 1 detector board, which is used
to determine the start timing of
220-001: Y
laser writing, does not send a
220-002: M
signal while the polygon motor
220-003: C
is operating normally and the
220-004: K0
LD is on.
220-005: K1
Definition
• Polygon mirror motor
does not reach the targeted
• Abnormal GAVD
operating speed within 15
seconds after turning on.
• Cable disconnection
become high within 15
seconds after turning off the
polygon motor.
become low within 0.2
second after the polygon
motor reaches the targeted
operating speed.
• Disconnection of the
• Incorrect installation
• Defective LD unit
• Defective BCU
• Defective +5VLD
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.)
circuit
4-12
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 laser optics housing unit.
6. Replace the BCU.
7. Replace the PSU.
17 January, 2003
Type