Samsung SF 5100, Service Manual

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Samsung Electronics 5-11
Maintenance & Troubleshooting
White line
missing definitely?
Dirt of dust stuck onto the window of internal
lens of LSU
-> Clean it or replace LSU
Preventive obstacles through the path between
OPC of developer and LSU prevent the path
-> Remove the obstacles
Check if the
printout is still has the
same problem even right after
passed through the
transfer roller
Toner material might be stuck to blade in the developer
inside and it prevents toner supply
-> Replace the toner cartridge
Check both if the toner cartridge’s counter is over its
guaranty and amount of the toner material
-> Replace the toner cartridge
The ribs in fuser or toner on the roller may invoke
the image problem
-> Replace the fuser cover or the defective part
The image is originally black or the black part is
far close to the top
-> Use the pattern which has the image below bigger
than 10mm from the top
NO
NO
END
NO
YES
Does the problem
persist?
YES
YES
Vertical White Line (Band)