2NP
1-4-36
4104
BD initialization problem (Y)
BD is not detected within two
seconds after the polygon
motor stabilizes.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
BDPWB and APCPWB
APCPWB and LSU connect PWB (YC4)
LSU connect PWB and engine PWB (YC13)
Defective
APCPWB.
Replace the Laser scanner unit (M).
(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).
4201
BD steady-state error K
The BD signal is not detected.
PD PWB K (LSU)
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).
Engine PWB
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
4202
BD steady-state error C
The BD signal is not detected.
PD PWB C (LSU)
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).
Engine PWB
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
Code
Contents
Causes
Check procedures/
corrective measures
Summary of Contents for TASKalfa 2551ci
Page 1: ...SERVICE MANUAL Published in September 2016 842NP11A 2NPSM06A Rev A TASKalfa 2551ci ...
Page 10: ...This page is intentionally left blank ...
Page 97: ...2NP 1 1 2 74 This page is intentionally left blank ...
Page 259: ...2NP 1 3 162 U486 Details on the modes Figure 1 3 47 Item No Description ...
Page 473: ...2NP 1 5 62 This page is intentionally left blank ...
Page 497: ...2NP 2 1 22 This page is intentionally left blank ...
Page 555: ...2NP 2 3 48 This page is intentionally left blank ...
Page 584: ...Installation Guide DP 770 B Document processor DP 772 Document processor Installation Guide ...
Page 620: ...DP 773 Document processor Installation Guide ...
Page 646: ...PF 791 500 x 2 Paper feeder Installation Guide ...
Page 654: ...PF 810 3000 sheets deck Installation Guide ...
Page 667: ...DF 770 D Document finisher Installation Guide ...
Page 685: ...AK 740 Bridge unit Installation Guide ...
Page 687: ...PH 7A C D Punch unit Installation Guide ...
Page 708: ...DT 730 B Document tray Installation Guide ...
Page 710: ...5 2013 5 302LC56750 01 H F G D D 6 4 3 7 E C D D M4 8 M4 8 M4 8 M4 8 ...
Page 711: ...FAX System W B Installation Guide ...