Brother HL-2600CN Series, Service Manual

Page: 336 / 385

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I-7 White Line (2)
Phenomenon
Vertical white line appears from the leading edge to the trailing edge of the printed image
as shown in
print sample (7) of Fig.8-2 .
Main Causes
The dustproof glass of the optical unit 2 is smeared with toner or foreign particles.
Countermeasures
Clean the dustproof glass.
1) Remove the OPC belt cartridge and toner cartridges. (See Section 2.1 of Chapter
VI .)
2) Remove the dustproof glass from the optical unit 2.
3) Clean the dustproof glass. (See Section 1.2.5 of Chapter VI .)
I-8 Vertical White Band
Phenomenon
White band appears in the vertical direction of printed image as shown in print sample (8)
of Fig.8-2 .
Main Causes
Silicone oil adhering to the transfer drum 2.
Fig.8-7
Countermeasures
1) Wipe off the oil adhering to the transfer unit 2 and its perimeter.
2) Replace the transfer drum 2 with a new one. (See Section 2.8 of Chapter VI .)
3) If the oil adhesion is excessive, replace the OPC belt cartridge and drum cleaner 2
with new ones. (See Section 2.1 and 2.5 of Chapter VI .)
Drum cleaner 2
Transfer drum 2
Transfer unit 2
Adhered silicon oil
Transfer drum 2