Samsung SCX-6320F/XEC Service Manual page 127

Troubleshooting
Fault
White or Black • Light or dark black dots on
spot
• White spots occur in the
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Recycled product • Poor appearance of the
• Unclean and rough
• Bad background in the
Service Manual
7-30
Signs
the image occur
periodically.
image periodically.
toner cartridge and the
drum cartridge.
printouts.
image.
Cause & Check
1. If light or dark periodical black
dots occur, this is because the
deve rollers are contaminated
with foreign substance or paper
particles.
(1)38.3mm interval :
Charged roller
(2)94.3mm interval :
OPC cycle
2. If white spots occur in a black
image at intervals of 94.3 mm,
or black spots occur elsewhere,
the OPC drum is damaged or
foreign substance is stuck to the
surface.
3. If a black and white or graphic
image is partially broken at irregu-
lar intervals, the transfer roller's life
has been expired or the transfer
voltage is abnormal.
1. Poor appearance of the toner
cartridge and the drum cartridge.
(1)Check the damage to label
and whether different materials
are used.
(2)Check the appearance of
parts of the toner cartridge
and the drum cartridge, such
as frame, hopper.
2. Unclean and rough printouts.
(1)Check whether foreign sub-
stance or toner are stuck to
the terminal (contact point) of
the toner cartridge and the
drum cartridge.
(2)Check whether the state of the
terminal assembly is normal.
Solution
1. In case of 1 above -
Run OPC Cleaning Mode Print
4-5 times repeatedly to remove.
Especially check foreign sub-
stance on the OPC surface, then
remove them with a clean gauze
moistened with IPA(Isopropyl
Alcohol) not to damage OPC if
necessary.
Caution : Never use usual alcohol.
2. In case of 2 -
If they are not disappeared by
running OPC Cleaning Mode
Print 4-5 times.
: at intervals of 94.3mm -
Replace the OPC Drum.
: at intervals of 38.3mm -
Remove foreign substance,
Clean the Charged Roller
: Broken image -
Replace the toner cartridge
according to carelessness.
3. In case of 3 - Exchange the
transfer roller because the life of
the transfer roller in use has
been expired. (Check the transfer
voltage and readjust if different.)
1. In case of 1 -
(1)If there is an evidence of dis-
assembling the toner cartridge.
(2)If materials other than normal
parts of the toner cartridge are
added or substituted.
2. In case of 2 - If there are any
abnormals in connection with the
situation of 1.
(1)It occurs when the toner cartridge
is recycled over 2 times.
(2)If toner nearly being expired
are collected to use, it is judged
as the recycled toner cartridge.
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