Irregular Density - Samsung ML-4500/XEV Service Manual

Irregular Density

OK after
taking out and
rocking the toner
cartridge?
YES
It is over the guaranty
life of toner cartridge
(Check the counter
and replace it)
Samsung Electronics
When gray
NO
pattern printing,
irregular density
persists?
YES
Bad images
aroung the no image
area?
YES
Light distortion due to
the mirror ruined or
LSU's diffused reflection
-> Replace LSU
transfer/
NO
charge/developing
voltage drops while
printing?
YES
Check high voltage
output and repair/
replace terminals, HVPS
Irregualrity of toner
NO
suppy from developer
-> Repalce developer
Troubleshooting
Defective agitator in
the toner supplying part
NO
of developer
->Replace the developer
Check if the 'guide deve
spring' works OK and
repair/repalce
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