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2KN/2KP
1-4-54
(6) A black line appears longitudinally.
(7) A black line appears laterally.
(8) One side of the copy image is darker than the other.
Copy example
Causes
Check procedures/corrective measures
Dirty or flawed drum.
Clean the drum. If the drum is flawed, replace the drum
(see page 1-5-44).
Deformed or worn cleaning blade.
Replace the cleaning blade.
Dirty contact glass.
Clean the contact glass.
Dirty scanner mirror.
Clean the scanner mirror.
Dirty upper and lower slit glass.
Clean the upper and lower slit glass.
Dirty main charger wire.
Clean the main charger wire or, if it is extremely dirty,
replace it.
Dirty or flawed press roller.
Clean the press roller.
Copy example
Causes
Check procedures/corrective measures
Flawed drum.
Replace the drum (see page 1-5-44).
Dirty developing section.
Clean any part contaminated with toner in the developing
section.
Leaking main charger housing.
Clean the main charger wire and grid.
Contact fail-
ure of
developing
bias termi-
nal.
Poor installation of high
voltage PWB.
Check the installation state of the high voltage PWB.
Copy example
Causes
Check procedures/corrective measures
Dirty main charger wire.
Clean the wire or, if it is extremely dirty, replace it (see page
1-5-27).
Defective exposure lamp.
Check if the exposure lamp light is distributed evenly. If not,
replace the exposure lamp (see page 1-5-28).
Defective CIS.
Check if the CIS light is distributed evenly.
If not, replace the CIS (see page 1-5-79).
Summary of Contents for TASKalfa 620
Page 1: ...SERVICE MANUAL Published in August 2009 842KP112 2KPSM062 Rev 2 TASKalfa 620 820 ...
Page 4: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 144: ...2KN 2KP 1 3 106 This page is intentionally left blank ...
Page 308: ...2KN 2KP 1 5 88 This page is intentionally left blank ...
Page 412: ...2KN 2KP 2 3 60 This page is intentionally left blank ...
Page 435: ...1 1 INSTALLATION GUIDE INSTALLATION GUIDE FOR SIDE FEEDER ...
Page 442: ...INSTALLATION GUIDE FOR LARGE SIZE SIDE FEEDER ...
Page 460: ...INSTALLATION GUIDE FOR DOCUMENT FINISHER ...
Page 475: ...INSTALLATION GUIDE FOR CENTERFOLD UNIT ...
Page 490: ...INSTALLATION GUIDE FOR MULTI JOB TRAY ...
Page 501: ...INSTALLATION GUIDE FOR PUNCH UNIT ...
Page 512: ...INSTALLATION GUIDE FOR STOPPER GUIDE ...
Page 515: ...INSTALLATION GUIDE FOR PRINTING SYSTEM ...
Page 518: ...INSTALLATION GUIDE FOR SCAN SYSTEM ...
Page 520: ......
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