Brother HL-2700CN Series, Service Manual

Page: 338 / 377

VIII-81
I-21 Back Stain
Phenomenon
Back side of the print paper is stained as shown in
print sample (21) of Fig.8-2 .
Main Causes
1) Fuser Unit:
1-1) The fuser roller and the back-up roller is stained.
(Print immediately after the inner jam occurred.)
1-2) Fusing off-set error occurred. (Fusing temperature is not correct.)
1-3) The fuser roller and the back-up roller are deteriorated.
2) The transfer roller is stained.
Countermeasures
1) Clean off the stain of the fuser roller by carrying out the blank printing for couple of
pages.
2) Replace the fuser unit FU with a new fuser unit FU.
3) Replace the transfer roller ASSY PU with a new transfer roller ASSY PU.