Dell 1135N Service Manual page 103

Alignment and Troubleshooting
2) Vertical White Line
Description : White vertical voids in the image.
Foreign matter stuck onto the
window : Clean the LSU window
1. Foreign matter stuck onto the
with recommended cleaner(IPA)
window of internal lenses
Clean the window with a clean
of LSU mirror.
cotton swab.
2. Foreign matter or
toner particles between the toner
cartridge roller and blade. (In case the life of the
Replace the toner cartridge.
toner cartridge has been expired, white
lines or light image occur in
front of the image.)
3. It may occur due to dirty or
No 3. : Clean the exposure
foreign substances are on the window
window. (toner cartridge)
of the toner cartridge frame.
No. 4. : Open the front cover and
4. If the fuser is defective,
check ribs that corresponds to the
voids occur periodically at the
position of the voids. Remove if
top of a black image.
found.
5. It may occur when foreign
If the problems are not solved,
substances are on the OPC Drum.
replace the toner cartridge.
6. Partly depression or
Replace the transfer roller if
deformation on the surface of the
occured as NO.6
transfer roller
4-30
Service Manual