Dell 2355DN Service Manual page 91

Irregular Density
OK after
NO
taking out and
rocking the toner
cartridge?
YES
It is over the guaranty
life of toner cartridge
(Check the counter
and replace it)
Service Manual
Alignment and Troubleshooting
When gray
NO
pattern printing,
irregular density
persists?
YES
Bad images
NO
around the no image
area?
YES
Light distortion due to
the mirror ruined or
LSU's diffused reflection
-> Replace LSU
4-51
transfer/
NO
charge/developing
voltage drops while
printing?
YES
Check high voltage
output and repair/
replace terminals, HVPS
Irregularity of toner
supply from the toner cartridge
-> Replace the toner cartridge
Defective agitator in
the toner supplying part
of the toner cartridge
->Replace the toner cartridge
Check if the 'guide deve
spring' works OK and
repair/repalce