Print Quality Problems; Wrong Print Position; Vertical White Lines; Horizontal Black Band - Xerox WorkCentre PE120 Service Manual

Troubleshooting

7.3 Print Quality Problems

7.3.1 Wrong Print Position

Example
Printing begins with the paper in the wrong position.
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7.3.2 Vertical White Lines

Example
There are white, vertical voids in the printed image.
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7.3.3 Horizontal Black Band

Example
Dark or blurry horizontal stripes periodically appear on the printed image.
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Possible Cause
Defective feed sensor.
Possible Cause
Contamination on the window or
internal lens of the laser mirror.
Foreign object inside the toner
cartridge.
Low toner.
If the fuser is defective, voids occur
periodically at the top of a black
image.
Contamination on the OPC drum.
Depression or deformation on the
surface of the transfer roller.
Possible Cause
Bad contacts on the toner cartridge
high voltage terminals.
The rollers in the toner cartridge
may be contaminated.
Charge roller = 37.7 mm
Supply roller = 44.9 mm
Develop roller = 35.3 mm
Transfer roller = 47.1 mm
WorkCentre PE 120/120i
Sequence of Repair Actions
a. Replace the defective actuator.
Sequence of Repair Actions
a. Clean the laser window with a
recommended cleaner (IPA) and a clean
cotton swab.
b. If dirt is inside the laser unit, replace it.
c. Replace the toner cartridge.
d. Open the front cover and check/remove any
contamination inside the printer that
corresponds to the position of the voids.
e. If the problem is not solved, replace the
toner cartridge.
f. Replace the transfer roller.
Sequence of Repair Actions
a. Clean all HV contacts on the cartridge and
primter frame.
b. Ensure all toner or paper dust particles are
removed.
c. Clean the Gear that has a relatively small
tooth gap on the OPC drum.
d. If the problem persists replace the toner
cartridge.