Brother HL-L5000D Service Manual page 84

 Error code 7401
When printing from the paper tray 2, the T2(LT or TT) paper feed sensor does not detect
paper pass within the specified time while the T2(LT or TT) paper empty sensor detects some
paper set.
<User Check>
• Remove the jammed paper.
• Add the paper properly using the paper tray 2 paper guide.
Step
Foreign object in the front of the
1
machine
Malfunction of the LT control
2
PCB or TT control PCB
T2(LT or TT) paper pick up roller
3
holder attachment failure
T2(LT or TT) paper feed
4
actuator attachment failure
Connection failure of the T2(LT
5
or TT) pickup clutch harness
Connection failure of the T2(LT
6 or TT) paper feed sensor
harness
7 PF kit 2 failure
T2(LT or TT) pickup clutch
8
failure
T2(LT or TT) paper feed sensor
9
PCB failure
T2(LT or TT) paper empty
10
sensor PCB failure
11 T2LT control PCB failure
12 TT control PCB failure
TT low-voltage power supply
13
PCB failure
14 Main PCB failure
Cause
Remove the foreign object.
Install the latest main firmware.
Reattach the T2(LT or TT) paper pick up roller
holder.
Reattach the T2(LT or TT) paper feed actuator.
Reconnect the T2(LT or TT) pickup clutch
harness.
Reconnect the T2(LT or TT) paper feed sensor
harness.
Replace the PF kit 2.
Replace the T2(LT or TT) pickup clutch.
Replace the T2(LT or TT) paper feed sensor
PCB ASSY.
Replace the T2(LT or TT) paper empty sensor
PCB ASSY.
Replace the T2LT control PCB ASSY.
Replace the TT control PCB ASSY.
Replace the TT low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-58
Remedy
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