Brother DCP-8157DN

2-90
Confidential
4.9 Troubleshooting for Laser Unit Problems
4.9.1 Laser unit failure
<User Check>
- Turn ON the power switch, and open the front cover and the back cover. Leave the
machine for a while to remove condensation.
Step Cause Remedy
1
Earth plate contact failure Check the contact of the laser unit earth
plate, and retighten the screws.
2
Connection failure of the laser unit
flat cable
Check the proper connection of the laser
unit flat cable, and reconnect it if necessary.
3 Laser unit failure Replace the laser unit.
4 Main PCB failure Replace the main PCB ASSY.