Dell 1135N Service Manual page 115

13) Stains on the Face of Page
Description : The background on the face of the printed page is stained.
1. Toner leakage due to improperly
contaminated, stains on the face of
Service Manual
Alignment and Troubleshooting
sealed toner cartridge.
2. If the transfer roller is
page will occur.
4-42
Replace the toner cartridge.
If the transfer roller is
contaminated, run PC Cleaning
Mode Print 2 or 3 times.
And perform Self-Test 2 or 3 times
to remove contamination.