Noise Comes From Machine; Unusable Device" Is Displayed - Brother HL-J6000DW Service Manual

4.10.7 Noise comes from machine

Step
1 Foreign materials in the
recording paper path
2 Foreign materials around the
maintenance unit
3 CR encoder strip stained
4 PF encoder disk stained
5 Looseness of the CR timing
belt
6 Looseness of the switchback
roller belt
7 Looseness of the paper feed
roller belt
8 Looseness of the paper
ejection roller belt
9 Looseness of the 3rd tray
paper feed belt
10 Looseness of the CIS drive
belt
11 Paper feed motor not mounted
in place
12 Carriage motor not mounted in
place
13 3rd tray paper feed motor not
mounted in place
14 CR encoder strip defective
15 PF encoder disk defective
16 Maintenance unit defective
17 ADF unit defective
18 Document scanner unit
defective

4.10.8 "Unusable Device" is displayed

< User Check >
- Disconnect the unsupported USB device.
Step
1 Main PCB defective
Cause
Remove foreign materials.
Remove foreign materials.
Clean the CR encoder strip.
Clean the PF encoder disk.
Re-hook the CR timing belt properly.
Re-hook the switchback roller belt properly.
Re-hook the paper feed roller belt properly.
Re-hook the paper ejection roller belt properly.
Re-hook the 3rd tray paper feed belt properly.
Re-hook the CIS drive belt properly.
Set the paper feed motor into place.
Set the carriage motor into place.
Set the 3rd tray paper feed motor into place.
Replace the CR encoder strip.
Replace the PF encoder disk.
Replace the maintenance unit.
Replace the ADF unit.
Replace the document scanner unit.
Cause
Replace the main PCB.
2-92
Solution
Solution
Confidential