Samsung CLX-3175N/XAZ Service Manual page 132

2) Vertical White Line
Description
White vertical voids in the image.
1. Foreign matter stuck
onto the window of internal lenses
of LSU mirror.
2. Foreign matter
or toner particles between the
developer roller and blade. (In case the
life of the developer has been expired,
white lines or light image occur
in front of the
3. It may occur
when Burr and foreign
substances are on the window of the
developer frame.
4. If the fuser is
defective, voids occur
periodically at the top of
a black image.
Service Manual
Alignment & Troubleshooting
image.)
Foreign matter stuck onto the window : Clean
the LSU window with recommended cleaner
(IPA) Clean the window with a clean cotton swab.
Foreign matter in the LSU : Open the cover of
LSU and clean with a cotton swab on the
surface of the reflex mirror.
No 3. : Remove the foreign matter and burr of
the exposure window.
(Developer cartridge)
1. No. 4. : Open the front cover and check ribs
that corresponds to the position of the voids.
Remove if found.
2. If the problems are not solved, replace the
developer cartridge.
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Samsung Electronics