Brother MFC-8540DN Service Manual

2-60
Confidential
 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 Cause Remedy
1
Foreign object in the front of the
machine
Remove the foreign object.
2
Malfunction of the TT control
PCB
Connect the TT and install the latest main
firmware.
3
T5TT paper pick up roller holder
attachment failure
Reattach the T5TT paper pick up roller holder.
4
T5TT paper feed actuator
attachment failure
Reattach the T5TT paper feed actuator.
5
Connection failure of the T5TT
pickup clutch harness
Reconnect the T5TT pickup clutch harness.
6
Connection failure of the T5TT
paper feed sensor harness
Reconnect the T5TT paper feed sensor
harness.
7 PF kit 5 failure Replace the PF kit 5.
8 T5TT pickup clutch failure Replace the T5TT pickup clutch.
9
T5TT paper feed sensor PCB
failure
Replace the T5TT paper feed sensor PCB
ASSY.
10
T5TT paper empty sensor PCB
failure
Replace the T5TT paper empty sensor PCB
ASSY.
11 TT control PCB failure Replace the TT control PCB ASSY.
12
TT low-voltage power supply
PCB failure
Replace the TT low-voltage power supply PCB
ASSY.
13 Main PCB failure Replace the main PCB ASSY.

Brother MFC-8540DN Specifications

General

Brand	Brother
Model	MFC-8540DN
Category	All in One Printer
Language	English