Brother HL-L5000D Service Manual page 93

 Error code 7B01
The MX jam lower sensor does not detect paper pass within the specified time after the eject
sensor detected paper pass.
<User Check>
• Remove the jammed paper.
• Close the back cover correctly.
Step
Foreign object in the rear of the
1
machine
2 MX flapper attachment failure
Connection failure of the MX
3
jam lower sensor harness
Connection failure of the MX
4
motor harness
5 MX switching solenoid failure
6 MX motor failure
7 MX control PCB failure
8 Main PCB failure
 Error code 7B02
The MX 1bin stack sensor does not detect paper pass within the specified time after the MX
jam lower sensor detected paper pass.
<User Check>
• Remove the jammed paper.
• Close the MX back cover correctly.
Step
Foreign object in the rear of the
1
machine
2 MX flapper 1 attachment failure Reattach the MX flapper 1.
MX 1bin stack actuator
3
attachment failure
Connection failure of the MX
4
flapper 1 solenoid harness
Connection failure of the MX
5
1bin stack sensor harness
Connection failure of the MX
6
relay PCB harness
7 MX 1bin stack sensor failure
8 MX flapper 1 solenoid failure
9 MX relay PCB failure
10 MX control PCB failure
11 Main PCB failure
Cause
Remove the foreign object.
Reattach the MX flapper.
Reconnect the MX jam lower sensor harness.
Reconnect the MX motor harness.
Replace the MX switching solenoid.
Replace the MX motor.
Replace the MX control PCB ASSY.
Replace the main PCB ASSY.
Cause
Remove the foreign object.
Reattach the MX 1bin stack actuator.
Reconnect the MX flapper 1 solenoid harness.
Reconnect the MX 1bin stack sensor harness.
Reconnect the MX relay PCB harness.
Replace the MX 1bin stack sensor.
Replace the MX flapper 1 solenoid.
Replace the MX relay PCB ASSY.
Replace the MX control PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
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