Samsung ML-331xD - Image Quality Problem

4. Alignment and Troubleshooting
4-41
Samsung Electronics
Service Manual
ML-331x/371x series
4.2.3 Image Quality problem
1) Vertical Black Line and Band
Description : 1. Straight thin black vertical line occurs in the printing.
2. Dark black vertical band occur in the printing.
3. Partly depression or
deformation on the surface of
the transfer roller.
2. Scratched surface of
the charge roller in the
toner cartridge.
1. Damaged developer
roller in the Toner cartridge.
Deformed Doctor-blade or cleaning-blade.
If causes 1 and 2 occur in the
toner cartridge, replace the toner
cartridge and try to print out.
Replace the transfer roller if
occurred as No. 3.
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