Samsung MultiXpress K7 Series - Horizontal Periodic Light;Dark Lines, Dots

4.Troubleshooting
4.7.4.HorizontalPeriodicLight/DarkLines,Dots.
A.Typicalfaultyimages
B.Troubleshootingprocedure
StepCheckitemAction
1Horizontalperiodicbands(OPC,188mm)
–OPCwasexposedforlonghours.
–Damagedbyhighvoltageinashorttime.
Assometimepasses,mostofbandswilldisappear.
ReplaceDrumunit.
(Referto3.2.2.1.)
2HorizontalperiodicLight/Darkbands(Roller-Magnetic,
35.7mm)
–Roller-Magneticisinferiorinquality.
–V-grooveofthesurfaceofRoller-Magneticisnot
uniform.
ReplaceDeveunit.
(Referto3.2.2.1.)
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