Brother MFC-8535DN Service Manual

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Confidential
 Error code 8501
When printing from paper tray 1 to 5, the T1 paper feed sensor detected open paper tray 1
(before registering printing data to engine).
Error code 8502
When printing from paper tray 2 to 5, the T2(LT or TT) paper feed sensor detected open
paper tray 2 (before registering printing data to engine).
Error code 8503
When printing from paper tray 3 to 5, the T3(LT or TT) paper feed sensor detected open
paper tray 3 (before registering printing data to engine).
Error code 8504
When printing from paper tray 4 to 5, the T4(LT or TT) paper feed sensor detected open
paper tray 4 (before registering printing data to engine).
<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 actuator
coming off or caught in some
sections of the machine
Reattach the appropriate LT/TT paper feed
actuator.
3
An LT/TT paper feed sensor
failure
Replace the appropriate LT/TT paper feed
sensor PCB ASSY.
4
High-voltage power supply PCB
failure
Replace the high-voltage power supply PCB
ASSY.
5 An LT control PCB failure Replace the appropriate LT control PCB ASSY.
6 TT relay PCB failure Replace a TT relay PCB ASSY.
7 TT control PCB failure Replace the TT control PCB ASSY.
8 Main PCB failure Replace the main PCB ASSY.

Brother MFC-8535DN Specifications

General

Brand	Brother
Model	MFC-8535DN
Category	All in One Printer
Language	English