Kyocera FS-C8520MFP Service Manual page 207

Code Contents
4003 Polygon motor (M) steady-
state error
The rated speed signal
detected the stability OFF
continuously for 1 s after the
polygon motor (M) stabilizes.
4004 Polygon motor (Y) steady-
state error
The rated speed signal
detected the stability OFF
continuously for 1 s after the
polygon motor (Y) stabilizes.
4011 Polygon motor (K) startup
error
Polygon motor (K) is not stabi-
lized within 10 s since the
motor is activated.
4012 Polygon motor (C) startup
error
Polygon motor (C) is not stabi-
lized within 10 s since the
motor is activated.
Causes
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Laser scanner unit (M) and LSU connect
PWB(YC7)
LSU connect PWB and engine PWB (YC12)
Defective motor. Replace the Laser scanner unit (M).
Defective PWB. Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-32).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Laser scanner unit (Y) and LSU connect
PWB(YC8)
LSU connect PWB and engine PWB (YC12)
Defective motor. Replace the Laser scanner unit (Y).
Defective PWB. Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-32).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Laser scanner unit (K) and LSU connect
PWB(YC5)
LSU connect PWB and engine PWB (YC12)
Defective motor. Replace the Laser scanner unit (K).
Defective PWB. Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-32).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Laser scanner unit (C) and LSU connect
PWB(YC6)
LSU connect PWB and engine PWB (YC12)
Defective motor. Replace the Laser scanner unit (C).
Defective PWB. Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-32).
1-4-19
Check procedures/
corrective measures
2MY/2MZ