Oki ES3640MFP Service & Troubleshooting Manual

Also see for CX3641 MFP: Configuration guide Module guide Handy reference Technical reference Technical user guide

Oki ES3640MFP Service & Troubleshooting Manual Manual pdf 59 page image

Random SpotsThere are spots of toner randomly scattered across the page. Toner melting off the Fuserthermistors can also place random spots onto prints.Initial Actions Perform Initial Actions from Print Quality Troubleshooting Practices Verify the Imaging Unit, Fuser, and Transfer Unit are not at or near end of life. Wastetoner, especially from the Transfer Unit, can cause random spots to appear on the page.NoteDepending on the type of paper and environmental conditions, some light amount of randombackground spotting is normal. The whiter and glossier the paper, the more noticeable it willbe.Areas of the Printer that Apply to Random Spots Imaging Unit Fuser Transfer RollerTroubleshooting Steps Resolution1. Is there toner spilled inside the printer? Yes – Vacuum inside the printerand remove all visible toner.No - Go to Step 2.2. Check the media for spots or contamination that exists prior to printing. Tryprinting on a different media, not a glossy media.Yes – Replace with fresh paper.No - Go to Step 3.3. Print the Color Test Pages to determine which primary color(s) are spotting ormissing. Is the problem with one color?Yes – Replace the Imaging UnitNo - Go to Step 4.4. Run the SMR (Smears) and BG (Background) from the printer’s Control Panel.Did this fix the problem?Yes – Complete.No - Go to Step 5.5. Inspect the Fuser. Is there dirt, debris, or contamination on the Fuser housingor rollers?Yes – Clean the FuserNo – Replace the Fuser.