Brother MFC-8460N Servise Manual page 359

(I-9) White vertical streaks
(1) Try to wipe the scanner window with a soft cloth.
(2) The toner cartridge may be damaged. Install a new toner cartridge.
(3) Check the machine's environment. High temperature and high humidity
(4) Damp (wet) paper might be used. Try to change to freshly unpacked
Possible cause Step
Translucent 1
stain on the
scanner
window
Transfer 2
failure
Condensation 3
(I-10) White horizontal streaks
(1) Check the paper used meets the recommended paper specifications. A
(2) Check that the appropriate media type is selected in the printer driver.
(3) The problem may disappear by itself. Try printing multiple pages to
(4) The drum unit may be damaged. Install a new drum unit.
Possible cause
Step
Developing 1
bias contact
failure
User Check
conditions can cause this problem.
paper.
Check
Is there any dirt on the
scanner window?
Is the transfer roller
scratched?
Has condensation occurred
inside the machine?
User Check
rough surfaced paper, damp paper or thick media can cause the problem.
clear this problem especially if the machine has not been used for a long
time.
Check
Are the developing bias
contacts between the
machine body and toner
cartridge dirty?
Result
Yes 1) Clean the scanner window.
2) If it is not effective, replace the
laser unit.
Yes Replace the drum unit.
Yes Try to print several pages or leave
the machine 2 hours to allow it to
reach room temperature.
Result
Yes Clean the electrodes at
both sides.
9-35
Remedy
Ground
Remedy
contacts
(4)
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