Lexmark 4039-1XX Manuale Utente

Service Manual

Fuser drive gear backlash is adjusted so that when gear #2 is held 
still, there is a slight amount of backlash in the fuser gear. Print 
quality can be affected if the gears are too tight.

1. Remove the fuser cover. 

2. Locate gear #2. It is the white adjustable gear mounted to the 

side frame below the fuser gear. 

3. Rotate the adjustable gear in one direction to check for backlash.

To adjust backlash:

1. Loosen the nut on the idler stud. 

2. Move the idler stud downward in its slot. 

3. Insert a 0.95 mm (.037) feeler gage between the gear shoulders 

from the front of the machine. You may need to use an angled or 
very small feeler gauge. 

4. With the nut snug but not tight, tap the idler upward until the 

gage is snug between the gear shoulders. 

5. Tighten the locking nut. 

6. Check the clearance again; tightening may have altered the 

adjustment. Be sure the fuser gear can be rotated slightly when 
gear #2 is held still.