6.2 The cause and solution of Bad image
6.2.1 Vertical Black Line and Band
• Description
1. Straight thin black vertical line occurs in the printing.
2. Dark black vertical band occur in the printing.
Check and Cause Solution
1. Deformed Doctor-blade or cleaning-blade,
in print cartridge
2. Scratched surface of the charge roller in
the print cartridge.
3. Partly depression or deformation on the
surface of the transfer roller.
1. If causes 1 and 2 occur in the print
cartridge, replace the print cartridge and
try to print out.
2. Replace the transfer roller if occurred as
No. 3.
6.2.2 Vertical White Line
• Description White vertical voids in the image.
Check and Cause Solution
1. Foreign matter stuck onto the window of
internal lenses of LSU mirror.
2. Foreign matter or toner particles between
the print cartridge roller and blade.
(In case the life of the print cartridge has
been expired, white lines or light image
occur in front of the image.)
3. It may occur when Burr and foreign
substances are on the window of the
print cartridge frame.
4. If the fuser is defective, voids occur
periodically at the top of a black image.
5. It may occur when foreign substances
are on the OPC Drum.
6. Partly depression or deformation on the
surface of the transfer roller
1. Foreign matter stuck onto the window :
Clean the LSU window with recommend-
ed cleaner(IPA) Clean the window with a
clean cotton swab.
2.. Replace the print cartridge.
3. No 3. : Remove the foreign matter and
burr of the exposure window.
(print cartridge)
4. No. 4. : Open the front cover and check
ribs that corresponds to the position of
the voids. Remove if found.
5. If the problems are not solved, replace
the print cartridge.
6. Replace the transfer roller if occured as
NO.6
Service Manual
Troubleshooting
6 -2
Samsung Electronics
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