Kyocera TASKalfa 2551ci Service Manual page 343

Code Contents
4104 BD initialization problem (Y)
BD is not detected within two
seconds after the polygon
motor stabilizes.
4201 BD steady-state error K
The BD signal is not detected.
4202 BD steady-state error C
The BD signal is not detected.
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 (YC4)
LSU connect PWB and engine PWB (YC13)
Defective Replace the Laser scanner unit (M).
APCPWB. (see page 1-5-20)
Defective BDPWB.
Defective PWB. Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-39).
PD PWB K (LSU)
Engine PWB
PD PWB C (LSU)
Engine PWB
1-4-36
Check procedures/
corrective measures
1. Confirm that the FCC wiring connector is
not distorted and connect the FCC
wiring all the way in.
Laser scanner unit and LSU relay PWB
(YC1)
LSU relay PWB (YC10) and Engine
PWB (YC13)
2. If the FCC wiring is disconnected,
shorted or grounded, replace the FCC
wiring.
3. Replace the laser scanner unit (see
page 1-5-20).
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
42).
1. Confirm that the FCC wiring connector is
not distorted and connect the FCC
wiring all the way in.
Laser scanner unit and LSU relay PWB
(YC3)
LSU relay PWB (YC10) and Engine
PWB (YC13)
2. If the FCC wiring is disconnected,
replace the FCC wiring.
3. Replace the laser scanner unit (see
page 1-5-20).
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
42).
2NP