Samsung SCX-5530FN/XAZ Service Manual page 152

Troubleshooting
Fault
White Black spot
Recycled product
Service Manual
6-28
Signs
1. If light or dark periodical black
• Light or dark black
dots occur, this is because the
dots on the image
developer rollers are contami-
occur periodically.
nated with foreign substance
or paper particles.
• White spots occur
(1) 37.7 mm interval : Charged
in the image period-
ically.
(2) 75.5 mm interval : OPC cycle
2. If white spots occur in a black
3. If a black and white or graphic
• Poor appearance of 1. Poor appearance of the devel-
the developer.
(1) Check the damage to label
• Unclean and rough
printouts.
(2) Check the appearance of
• Bad background in
the image.
2. Unclean and rough printouts.
(1) Check whether foreign sub-
(2) Check whether the state of
Cause & Check
roller
image at intervals of 75mm, or
black spots occur elsewhere,
the OPC drum is damaged or
foreign substance is stuck to
the surface.
image is partially broken at
irregular intervals, the transfer
roller's life has been expired or
the transfer voltage is abnor-
mal.
oper.
and whether different mate-
rials are used.
parts of the developer, such
as frame, hopper.
stance or toner are stuck to
the terminal (contact point)
of the developer.
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.
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 37.7 mm -
Replace the developer.
: at intervals of 75.5 mm -
Remove foreign substance.
: Broken image -
Replace the developer accord-
ing 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 disas-
sembling the developer.
(2)If materials other than normal
parts of the developer 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 developer
is recycled over 2 times.
(2) If toner nearly being expired
are collected to use, it is
judged as the recycled devel-
oper.
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