Samsung CLX-6250FX Service Manual page 145

Contamination on back of page
The back of the page is contaminated.
Description
Cause and Check Point
Dirty registration roller, pressure roller, feed roller, etc.
Any dirty rollers through the path of the paper.
Dirty PTB belt or damaged PTB belt.
Dirty feed guide, or any paper delivery guide.
Dark image or Black
Dark or Black image
Horizontal Bands
The back of the page is contaminated.
Description
Cause and Check Point
No charging voltage in the HVPS
Poor contact between toner cartridge and set contacts.
HVPS is defective.
Service Manual
Alignment & Troubleshooting
Poor fusing Blank Page
Identify the roller which may cause the problem by
comparing the period of the contamination on images
with the size of rollers. Clean any dirt from the roller or
replace the dirty roller.
Clean PTB or replace the PTB unit.
Clean the part which cause the contamination.
Vertical Black Line and Band
Uneven Density
Check the connecting state between the Main PBA and
HVPS. Reconnect the harness.
Clean the contacts as necessary. Replace any
deformed or damaged contacts.
Replace the HVPS.
4-74
Vertical White Line
Solution
Contamination on back of page
Poor fusing
Solution
Dark image or Black
Horizontal Bands
Samsung Electronics
Vert