Dark Image - Samsung ML-4500/XEV Service Manual

Dark Image

with -350V of Bias
The power of LSU is set
high or internal problem
-> Replace LSU or adjust
voluem
Samsung Electronics
Works cor
NO
voltage?
YES
Works
NO
correctly after
replaced LSU?
YES
Repair or replace the defective
component
Toner over supply due to the
adjustment fault of metering
blade in developer
-> Replace developer
Troubleshooting
4-11