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Brother HL-5240 Service Manual page 163

Laser printer
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(I-13) Image distortion
Possible cause
Step
Laser unit
1
installation
Scanner LD
2
emission failure
Scanner motor
rotation failure
Scanner
3
connection
failure
(I-14) Faint print
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Possible cause
Step
Printer
1
installation
Toner cartridge
2
Scanner window
3
dirty
Laser unit failure
4
Check
Is the laser unit secured to the
frame incorrectly?
(Check if there is any play.)
Is the laser diode or the
scanner motor defective?
Is the scanner harness
connected properly?
(Check if it is coming loose.)
Check
Is the printer placed
horizontally?
Does the problem happen
immediately after replacing the
toner cartridge with a new
one?
Is the scanner window dirty?
Is the problem solved by
replacing the laser unit?
4-49
HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Result
Remedy
Yes
Secure the unit correctly and
tighten the screws.
Yes
Replace the laser unit.
No
Connect the harness correctly.
Result
Remedy
No
Place the printer on a flat
surface.
Yes
Remove and carefully shake the
toner cartridge horizontally.
Yes
Clean the scanner window with a
soft dry cloth.
Yes
Replace the laser unit.
Confidential
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This manual is also suitable for:

Hl-5250dnHl-5240lHl-5270dnHl-5280dw

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