Brother MFC-8540DN Service Manual

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Confidential
 Error code 8505
When printing from paper tray 1 to 5, the T1 paper feed sensor detected open paper tray 1
(after registering printing data to engine).
Error code 8506
When printing from paper tray 2 to 5, the T2(LT or TT) paper feed sensor detected open
paper tray 2 (after registering printing data to engine).
Error code 8507
When printing from paper tray 3 to 5, the T3(LT or TT) paper feed sensor detected open
paper tray 3 (after registering printing data to engine).
Error code 8508
When printing from paper tray 4 to 5, the T4(LT or TT) paper feed sensor detected open
paper tray 4 (after registering printing data to engine).
 Error code 8702
Machine stack sensor detected the ejected paper full state at the start of printing.
<User Check>
• Close the appropriate paper tray correctly.
Step Cause Remedy
1
Malfunction of an LT control
PCB or TT control PCB
Install the latest main firmware.
2
An LT/TT paper feed sensor
failure
Replace the appropriate LT/TT paper feed
sensor PCB ASSY.
3 An LT control PCB failure Replace the appropriate LT control PCB ASSY.
4 TT relay PCB failure Replace a TT relay PCB ASSY.
5 TT control PCB failure Replace the TT control PCB ASSY.
6 Main PCB failure Replace the main PCB ASSY.
<User Check>
• Remove the paper from the machine output tray.
Step Cause Remedy
1
Machine stack actuator coming
off or caught in some sections of
the machine
Reattach the machine stack actuator.
2 Machine stack sensor failure Replace the machine stack sensor.
3 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