Samsung SCX-6545N Series, Service Manual

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Alignment & Troubleshooting
Service Manual
4-118
Samsung Electronics
Error Fuser
[Description] Fuser Error
[Wrong Part] 1. Thermostat Open
2. Check IH Fan
3. IH PBA
4. Main PBA
[Check and Cause] 1. Detach AC connector and measure the resistance between them whether it is
below
10ohm. If it is over mega ohm, replace it.
2. Replace IH Fan.
3. Replace IH PBA
4. Replace main PBA.
Error Vertical Black Line and Black Band
[Description] 1. Straight thin black vertical line occurs in the printing.
2. Dark black vertical band occur in the printing.
[Wrong Part] 1. Cleaning blade
2. Charge roller
[Check and Cause] 1. Damaged cleaning blade in the drum cartridge
2. Contamination of the charge roller in the drum cartridge
[Solution] 1. If causes 1 and 2 occur in the drum Cartridge, replace the drum cartridge and
try again to print out.
Error Vertical White Line
[Description] White vertical voids in the image.
[Wrong Part] 1. LSU
2. Drum Cartridge
[Check and Cause] 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.
[Solution] 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.