Oki ES3640MFP Service & Troubleshooting Manual page 67

Process Direction Bands, Voids, or Streaks
There are areas of the image that are extremely light or missing entirely. These missing
areas form wide bands that run along the page parallel to the leading edge of the paper
Initial Actions:
Perform Initial Actions from
Areas of the Printer that Apply to Process Direction Bands, Voids, or Streaks
1. Print the 100% Solid Fill Test print. Is the problem with one primary color?
2. Is the paper wrinkled, dimpled or curled Indicating a high moisture content?
Load a fresh ream of paper. Did this correct the problem?
3. Print multiple pages. Do the defects correspond to a customer Replaceable
Consumable?
4. Inspect the Fuser housing for warping or damage.
Print Quality Troubleshooting Practices
Imaging Unit
Transfer Unit belt
Troubleshooting Steps Resolution
Yes – Replace the defective
Imaging
Unit.
No - Go to Step 2.
Yes – Complete.
No - Go to Step 3.
Yes – See "Repeating Bands,
Lines, Marks, or Spots" on page
17.
No - Go to Step 4.
Yes – Replace the Fuser.
No - Replace the Engine Control
Board
.