Brother FAX-2820 Service Manual page 217

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 printer's environment. High temperature and high humidity
(4) Damp (wet) paper might be used. Try to change to freshly unpacked
Possible cause Step
Transfer 1
failure
Condensation 2
Toner 3
cartridge
failure
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 the transfer roller
scratched?
Has condensation occurred
inside the printer?
Is there a visible vertical
streak on the developing
roller?
User Check
rough surfaced paper, damp paper or thick media can cause the problem.
clear this problem especially if the printer has not been used for a long
time.
Check
Are the developing bias
contacts between the
printer body and toner
cartridge dirty?
9 -3 6
Result Remedy
Yes Replace the drum unit.
Yes Try to print several pages or leave
the printer 2 hours to allow it to
reach room temperature.
Yes Replace the toner cartridge with a
new one.
Remedy
Result
Yes Clean the electrodes at
both sides.
Ground
contacts
(4)
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