Image problems may appear at regular intervals that depend on the circumference of certain components. The following diagram shows the possible symptoms (black or white dots at regular intervals).
Unit | Parts | Interval * |
|---|---|---|
PCDU | Drum | 95mm |
Development Roller | 34mm | |
Cleaning Roller | 30mm | |
Charge Roller | 30mm | |
Image Transfer | Image Transfer Belt | 750mm |
Paper Transfer | Transfer Roller | 60mm |
Fusing | Fusing Belt | 95mm |
* The interval may vary depending on the temperature and paper slippage.
Each LED head has 26 LED chips on board, and each chip has a line of LEDs 8mm in length.
If a vertical line 8mm in width appears on the image parallel to the direction of paper feed, it may be caused by a broken LED chip. Exchange the LED head with one of the other colors to troubleshoot the symptom.