Brother DCP-L5500D Service Manual page 93

 Error code 7601
When printing from the paper tray 4, the T4(LT or TT) paper feed sensor does not detect
paper pass within the specified time while the T4(LT or TT) paper empty sensor detects some
paper set.
<User Check>
• Remove the jammed paper.
• Add the paper properly using the paper tray 4 paper guide.
Step
Foreign object in the front of the
1
machine
Malfunction of the LT control
2
PCB or TT control PCB
T4(LT or TT) paper pick up roller
3
holder attachment failure
T4(LT or TT) paper feed
4
actuator attachment failure
Connection failure of the T4(LT
5
or TT) pickup clutch harness
Connection failure of the T4(LT
6 or TT) paper feed sensor
harness
7 PF kit 4 failure
T4(LT or TT) pickup clutch
8
failure
T4(LT or TT) paper feed sensor
9
PCB failure
T4(LT or TT) paper empty
10
sensor PCB failure
11 T4LT 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 T4(LT or TT) paper pick up roller
holder.
Reattach the T4(LT or TT) paper feed actuator.
Reconnect the T4(LT or TT) pickup clutch
harness.
Reconnect the T4(LT or TT) paper feed sensor
harness.
Replace the PF kit 4.
Replace the T4(LT or TT) pickup clutch.
Replace the T4(LT or TT) paper feed sensor
PCB ASSY.
Replace the T4(LT or TT) paper empty sensor
PCB ASSY.
Replace the T4LT 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
Confidential