Brother DCP-7090 Service Manual page 125

 Electrodes location of the process unit
 Faulty registration
Step
Registration rear actuator
1
coming off
2 Laser unit failure
3 Main PCB failure
Fig. 2-17
<User Check>
• Check whether appropriate paper type is selected on the
driver.
• Install the latest main firmware.
Cause
Reattach the registration rear actuator.
Replace the laser unit.
Replace the main PCB ASSY.
2-85
Remedy
Confidential