PrintCopy.info service

HP Color LaserJet Managed MFP E78228

Troubleshooting. Image Defects 4

Skewed image

 

Step Cause Action
1 - Tray is not installed properly.
- Too much paper is loaded in the tray.
- The tray guide is not set properly.
Reinstall the tray properly.
2 The surface of the pickup/reverse/ feed roller is contaminated or worn out. Clean or replace the contaminated roller.
3 If the skewed image occurs during a copy job, check the ADF installation. Reinstall the ADF (flow ADF or ADF) unit.
Adjust the ADF skew.

Blank copy

 

Step Cause Action
1 Laser scanner assembly operation error Check laser scanner assembly connections
2 All connections on the HVPS board are connected correctly Reconnect all connections
3 Check if the related parts are damaged or broken Replace the HVPS board, engine controller board, or laser scanner assembly
4 Check the connection between the scan joint board and the engine controller board Reconnect the harness
If the connection is correct, replace the engine controller board

Poor fusing performance

 

Step Cause Action
1 Check the paper type.
Depending on what type of paper is used, print speed varies.
- Plain (71~90g/), Thick (91~105g/): Full Speed
- Heavy weight (106~175g/): Half speed
- Envelope (75~90 g/), Label (120~150 g/): Half speed.
Check that the paper type displayed on the control panel is the same type of paper being used for the print job.
2 The fuser unit is worn out. Replace the fuser unit.
3 Check the surface of the fuser belt and pressure roller for scratches. Replace the fuser unit.
4 Check the temperature control system for problems.
- Thermistor is broken or operates abnormally
- Halogen lamp is broken or operates abnormally
Check the non-contact thermistor sensor.
Check the halogen lamp.
If parts are broken, replace the broken parts or the Fuser unit.
5 Check if the pressure control system operates properly. Check the pressure control system.
If the problem persists, replace the fuser unit.
6 Paper is wrapped on the heating roller. Remove the wrapped paper and print a test page.
If the problem persists, replace the Fuser unit.

Stain on back of paper

 

Step Cause Action
1 The transfer roller is dirty or worn out. Clean or replace the transfer roller assembly.
2 There is any stain caused by poor cleaning on the ITB unit. Clean the ITB.
If the problem persists, replace the ITB unit.
3 The ITB cleaning blade is not in proper contact with the ITB. Take off the ITB and check that the ITB cleaning blade pressure spring and the pressure hook are installed correctly.
4 The fuser belt and pressure roller are dirty. Clean the fuser belt and pressure roller.
5 Pressure roller surface is damaged. Replace the fuser unit.
Error Code
Service Mode, Troubleshooting
Parts Catalog
Compatibility
Downloads Files
Home
New Register Forgot Password?
Send message to us