Brother MFC-8535DN Service Manual

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Confidential
4.7 Troubleshooting for Toner and Drum Problems
4.7.1 New toner is not detected
4.7.2 Toner cartridge cannot be recognized
4.7.3 Error message prompting toner cartridge replacement does not disappear
<User Check>
• Check that the packaged toner cartridge is not set.
• Check that a new (not used) toner cartridge is set.
• Check that the genuine toner cartridge is set.
Step Cause Remedy
1 New toner actuator coming off Reattach the new toner actuator.
2
Connection failure of the relay front
harness
Reconnect the relay front harness.
3 Relay front PCB failure Replace the relay front PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
<User Check>
• Set the toner cartridge correctly.
• Replace the toner cartridge with a new one.
Step Cause Remedy
1
Toner amount detection sensor
PCB (light reception) failure
Replace the toner amount detection sensor
PCB ASSY (light reception).
2 Relay front PCB failure Replace the relay front PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
<User Check>
• Check that a new (not used) toner cartridge is set.
• Check that the genuine toner cartridge is set.
Step Cause Remedy
1 New toner actuator coming off Reattach the new toner actuator.
2
Connection failure of the relay front
harness
Reconnect the relay front harness.
3 Relay front PCB failure Replace the relay front PCB ASSY.
4 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