The Cause And Solution Of Bad Image - Dell 1135N Service Manual

4.2.2 The cause and solution of Bad image

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.
1. Damaged develop roller in
the Toner cartridge. Deformed Doctor-blade
the charge roller in the toner cartridge.
deformation on the surface of
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or cleaning-blade.
2. Scratched surface of
3. Partly depression or
the transfer roller.
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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.