Brother DCP-L5500D Service Manual page 95

 Error code 7701
When printing from the paper tray 5, the T5TT paper feed sensor does not detect paper pass
within the specified time while the T5TT paper empty sensor detects some paper set.
<User Check>
• Remove the jammed paper.
• Add the paper properly using the paper tray 5 paper guide.
Step
Foreign object in the front of the
1
machine
Malfunction of the TT control
2
PCB
T5TT paper pick up roller holder
3
attachment failure
T5TT paper feed actuator
4
attachment failure
Connection failure of the T5TT
5
pickup clutch harness
Connection failure of the T5TT
6
paper feed sensor harness
7 PF kit 5 failure
8 T5TT pickup clutch failure
T5TT paper feed sensor PCB
9
failure
T5TT paper empty sensor PCB
10
failure
11 TT control PCB failure
TT low-voltage power supply
12
PCB failure
13 Main PCB failure
Cause
Remove the foreign object.
Connect the TT and install the latest main
firmware.
Reattach the T5TT paper pick up roller holder.
Reattach the T5TT paper feed actuator.
Reconnect the T5TT pickup clutch harness.
Reconnect the T5TT paper feed sensor
harness.
Replace the PF kit 5.
Replace the T5TT pickup clutch.
Replace the T5TT paper feed sensor PCB
ASSY.
Replace the T5TT paper empty sensor PCB
ASSY.
Replace the TT control PCB ASSY.
Replace the TT low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-60
Remedy
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