Print Quality Problems; Vertical Black Line And Band; Vertical White Lines - Xerox Phaser 3150 Service Manual

7
Troubleshooting

7.1 Print Quality Problems

7.1.1 Vertical Black Line and Band

Example
There are straight, black, vertical lines or banding on the printed image.
1. Damaged developer roller,
deformed doctor blade, or cleaning
Digital P inter
blade within the toner
cartridge.Scratched surface on the
Digital P inter
charge roller within the toner
Digital P inter
cartridge.
Digital P inter
2. Depression or deformation on the
surface of the transfer roller.
Digital P inter
3. Contaminated Fuser.

7.1.2 Vertical White Lines

Example
There are white, vertical voids in the printed image.
1. Contamination on the window or
internal lens of the laser mirror.
Digita Printer
2. Foreign object inside the toner
cartridge.
Digita Printer
3. Low toner.
Digita Printer
4. If the fuser is defective, voids occur
Digita Printer
periodically at the top of a black
Digita Printer
image.
5. Contamination on the OPC drum.
6. Depression or deformation on the
surface of the transfer roller.
Possible Cause
Possible Cause
Sequence of Repair Actions
a. Print a cleaning sheet.
b. Replace the toner cartridge and re-test.
c. Replace the transfer roller and re-test.
d. Replace the fuser.
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.
Troubleshooting
Service Manual 7-1