Phaser 7760 black smudges/streak marks

[vandenm]

Hi

I'm getting black smudges/streak marks at regular intervals on my 7760 (5 on A3 sheet size). I have replaced the fuser and transfer roller but no luck.I'm not convinced it is the imaging unit. Any help much appreciated.

Cheers

Mike V.

[Joe053204-hcl]

Component Repeating Distance (Metric) Repeating Distance (Imperial)

Accumulator Belt	Every four pages of A4 or Letter size paper printed LEF, or on every other page of Tabloid size paper printer SEF.
Fuser	84 mm	3.3 in.
Fuser or Imaging Unit	94 mm	3.7 in.
Transfer Roller	88 mm	3.5 in.
Imaging Unit	44 mm	1.7 in.
Developer Roller	28.3 mm	1.1 in.