Brother HL-5340D Service Manual page 86

NEW TONER IS NOT DETECTED
Step
New toner actuator catching on
1
some position
New toner actuator spring loose
2
New toner sensor PCB ASSY
harness connection failure
3
4 New toner actuator failure
New toner sensor PCB ASSY
5
failure
6 Main PCB ASSY failure
LED FAILURE
Step
Panel PCB harness connection
1
failure
2 Panel PCB failure
3 Main PCB ASSY failure
LCD failure
Step
Panel PCB harness connection
1
failure
LCD harness connection failure
2
3 Panel PCB failure
4 Main PCB ASSY failure
PRINTER STOPS WHILE IDLING
Step
1 Front cover is opened
Process unit electrode dirty
2
3 Main PCB ASSY failure
Idling: To keep the toner evenly without one-sided. When turn the power ON or start the
printing, Turn the exposure drum or develop roller before stating the printing.
Cause
Re-assemble the new toner actuator.
Re-assemble the new toner actuator
spring.
Check the sensor performance following
the procedure in
in 1.3 Service Mode in Chapter
If any problem occurs, check the harness
connection of the new toner sensor PCB
ASSY, then reconnect it.
Replace the new toner actuator.
Replace the new toner sensor PCB ASSY.
Replace the main PCB ASSY.
Cause
Check the harness connection of the panel
PCB, then reconnect it.
Replace the panel PCB.
Replace the main PCB ASSY.
Cause
Check the harness connection of the panel
PCB, then reconnect it.
Check the harness connection of the LCD,
then reconnect it.
Replace the panel PCB.
Replace the main PCB ASSY.
Cause
Replace the front cover.
Clean the electrodes on the process unit.
(Refer to
Replace the main PCB ASSY.
3-28
Remedy
"Factory Inspection Mode"
7.
Remedy
Remedy
Remedy
Fig. 3-2.)
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