HP LaserJet MFP E72535

Symptom

Machine makes noise during a print job.

Cause

• The gear train needs to be greased.
• An old type gear is assembled.

Troubleshooting

1. Enter service mode.
2. Execute a fuser motor test.
   Service Mode > Diagnostics > Engine Diagnostics > Engine Test Routines > Fuser Motor Forward
3. Remove the fuser unit and execute the fuser motor test again.
4. If the printer still makes a noise during a print job, replace the DRIVE-FUSER EXIT assembly.
5. If the problem is not resolved, replace the Fuser unit.