Ricoh SP4520DN
Troubleshooting. Problem at Regular Intervals
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 or other problems).
1. Paper feed direction
2. Problems at regular intervals
| Problems | Intervals | Defective parts |
|---|---|---|
| Problems with the printed result (other than black or white dots) | 29.9mm | Charge roller |
| 37.7mm | Registration roller | |
| 45.8mm | Image transfer roller | |
| 112mm | Fusing pressure roller | |
| 94mm | Fusing roller | |
| 100.5mm | Paper feed roller | |
| Black or white dots | 35.6mm | Development roller |
| 94.4mm | Drum |
The LED head contains 26 LED chips, each covering a line 8 mm wide. If a line 8 mm wide extending in the paper feed direction appears, an LED chip may be damaged. If so, replace the LED head