Kyocera FS-C8520MFP Service Manual page 209

Code Contents
4103 BD initialization problem
(M)
BD is not detected within one
second after the polygon
motor stabilizes.
4104 BD initialization problem (Y)
BD is not detected within one
second after the polygon
motor stabilizes.
4600 LSU cleaning motor error
When the LSU cleaning motor
is driven, an error signal is
detected continuously for 1 s.
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. BDPWB and APCPWB
APCPWB and LSU connect PWB (YC3)
LSU connect PWB and engine PWB (YC12)
Defective Replace the Laser scanner unit (M).
APCPWB. (see page 1-5-20)
Defective BDPWB.
Defective Main Replace the main PWB and check for cor-
PWB. rect operation (see page 1-5-31).
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. BDPWB and APCPWB
APCPWB and LSU connect PWB (YC4)
LSU connect PWB and engine PWB (YC12)
Defective Replace the Laser scanner unit (M).
APCPWB. (see page 1-5-20)
Defective BDPWB.
Defective Main Replace the main PWB and check for cor-
PWB. rect operation (see page 1-5-31).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity of the connector cable. If none, replace
contact in the con- the cable.
nector. LSU cleaning motor and LSU connect
PWB(YC11)
LSU connect PWB and engine PWB(YC12)
Defective drive Check if the rollers and gears rotate
transmission sys- smoothly. If not, grease the bushings and
tem. gears. Check for broken gears and replace if
any.
Defective motor. Replace the LSU cleaning motor.
Defective PWB. Replace the engine PWB or LSU connect
PWB check for correct operation
(see page 1-5-32).
1-4-21
Check procedures/
corrective measures
2MY/2MZ