Samsung SCX-6345N/XAA Service Manual page 165

Troubleshooting
Error
[Description]
[Wrong Part]
[Check and Cause]
[Solution]
Error
[Description]
[Wrong Part]
[Check and Cause]
[Solution]
Service Manual
6-18
Vertical Black Line and Black Band
1. Straight thin black vertical line occurs in the printing.
2. Dark black vertical band occur in the printing.
1. Cleaning blade
2. Charge roller
1. Damaged cleaning blade in the drum cartridge
2. Contamination of the charge roller in the drum cartridge
1. If causes 1 and 2 occur in the drum Cartridge, replace the drum cartridge and try
again to print out.
Vertical White Line
White vertical voids in the image.
1. LSU
2. Drum Cartridge
1. Foreign matter stuck onto the window of internal lenses of LSU mirror.
2. Foreign matter or toner particles between the magnetic roller and doctor blade.
3. It may occur when Burr and foreign substances are on the window of the drum
cartridge frame.
4. If the fuser is defective, voids occur periodically at the top of a black image.
1. Foreign matter stuck onto the window : Clean the LSU window with recommended
cleaner(IPA) Clean the window with a clean cotton swab.
2. Foreign matter in the LSU : Open the cover of LSU and clean with a cotton swab on
the surface of the reflex mirror.
3. No 3. : Remove the foreign matter and burr of the exposure window.
(the drum cartridge frame)
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 drum cartridge.
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