2NP-9
1-4-33
4001
Polygon motor (K) steady-
state error
The rated speed signal
detected the stability OFF
continuously for 1 s after the
polygon motor (K) 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.
Laser scanner unit (K) and LSU connect
PWB(YC5)
LSU connect PWB and engine PWB (YC14)
Defective motor.
Replace the Laser scanner unit (K)
(see page 1-5-20).
Defective PWB.
Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-39).
4002
Polygon motor (C) steady-
state error
The rated speed signal
detected the stability OFF
continuously for 1 s after the
polygon motor (C) 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.
Laser scanner unit (C) and LSU connect
PWB(YC7)
LSU connect PWB and engine PWB (YC14)
Defective motor.
Replace the Laser scanner unit (C)
(see page 1-5-20).
Defective PWB.
Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-39).
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.
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.
Laser scanner unit (M) and LSU connect
PWB(YC6)
LSU connect PWB and engine PWB (YC14)
Defective motor.
Replace the Laser scanner unit (M)
(see page 1-5-20).
Defective PWB.
Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-39).
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.
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.
Laser scanner unit (Y) and LSU connect
PWB(YC8)
LSU connect PWB and engine PWB (YC14)
Defective motor.
Replace the Laser scanner unit (Y)
(see page 1-5-20).
Defective PWB.
Replace the engine PWB or LSU connect
PWB and check for correct operation
(see page 1-5-39).
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 ...