Samsung SCX-5315F Series Service Manual page 51

Troubleshooting
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)
4-30
When gray
NO
pattern printing,
irregular density
persists?
YES
PTL lamp
works OK?
YES
Any obstacles
on the PTL lamp?
YES
Clean the window of PTL
transfer/
NO
charge/developing
voltage drops while
printing?
YES
Check high voltage
output and repair/
replace terminals, HVPS
NO
Replace lamp
Bad images
NO
around the no image
area?
YES
Light distortion due to
the mirror ruined or
LSU's diffused reflection
-> Replace LSU
Defective agitator in
NO
the toner supplying part
of developer
->Replace the developer
Check if the 'guide deve
spring' works OK and
repair/repalce
Irregularity of toner
NO
supply from developer
-> Replace developer
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