2NP-5
1-4-76
(1) No image appears (entirely white).
(2) No image appears (entirely black).
Print example
Causes
Check procedures/corrective measures
Defective
transfer
bias output.
Defective connector cable
or poor contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity of the connector cable. If necessary,
replace the cable.
High voltage PWB and engine PWB (YC6)
High voltage PWB sub and engine PWB (YC7)
Defective high voltage
PWB.
Replace the high voltage PWB.
(see page 1-5-45)
Defective high voltage PWB
sub.
Replace the high voltage PWB sub.
Defective engine PWB.
Replace the engine PWB (see page 1-5-39).
Defective
developer
bias output.
Defective connector cable
or poor contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity of the connector cable. If necessary,
replace the cable.
High voltage PWB and engine PWB (YC6)
Defective high voltage
PWB.
Replace the high voltage PWB.
(see page 1-5-45)
Defective engine PWB.
Replace the engine PWB (see page 1-5-39).
No LSU
laser is out-
put.
Defective laser scanner
unit.
Replace the laser scanner unit
(see page 1-5-20).
Defective engin PWB.
Replace the engine PWB (see page 1-5-39).
Print example
Causes
Check procedures/corrective measures
No main
charging.
Defective connector 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.
High voltage PWB and engine PWB (YC6)
Defective charger roller unit. Replace the charger roller unit
(see page 1-5-15).
Defective high voltage
PWB.
Replace the high voltage PWB.
(see page 1-5-45)
Defective engine PWB.
Replace the engine PWB (see page 1-5-39).
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 ...