Samsung SF-830, Service Manual

Page: 54 / 189

Troubleshooting
4-21
Samsung Electronics
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 developer
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
YES
YES
Vertical White Line (Band)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer