Horizontal Periodic Light/Dark Band Or Dot - Samsung SL-X7600GX Service Manual

4. Troubleshooting

4.7.4. Horizontal periodic Light/Dark Band or Dot

A. Typical faulty images
B. Troubleshooting procedure
Step Cause
1 Horizontal periodic band (OPC, 94.2 mm)
• OPC was exposed for a long time.
• OPC is damaged by high voltage in a short time.
2 Horizontal periodic light/dark band (Roller-magnetic,
37mm)
Roller-magnetic is inferior in quality.
•
V-groove of Roller-magnetic surface is not
•
uniform.
4-221
Action
As some time passes, most of this trouble will disappear.
If not, replace the Drum Unit.
(Refer to 3.3.2.1.)
Replace the Deve Unit.
(Refer to 3.2.2.2.)
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