Light Image - Samsung ML-4500/XEV Service Manual

Troubleshooting

Light image

Is it not over
the guaranty life of dot
counter?
Is the toner save
mode or the light mode
is selected?
Is the high voltage
normal? (charging,
developing,
transfer)
Any obstacles on the
gab between high voltage
terminal and
developer?
Transfer roller
works OK?
OK after replacing
LSU?
Replace the developer
4-8
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
Replace the developer
Ok after setting to the
normal mode?
Replace the HVPS
NO
HVPS works OK?
Remove the obstacles
Clean transfer roller
and gear holder
Replace the LSU
YES
NO
YES
YES
Samsung Electronics
END