Brother MFC-J3520 Service Manual page 87

Error Code F8

Unable to Print F8
Battery harness is detected to be not correctly inserted.
Although this error is usually unlikely to occur, it can be considered to occur due to
noise around the location of setting, power supply voltage fluctuation or problem of
software.
User Check
- Turn the power OFF and ON.
Step
1 Main PCB defective
Error Code FE

Unable to Print FE
ROM data acquisition error
User Check
- Turn the power OFF and ON.
Step
1 Program malfunctioning
2 Main PCB defective
Cause
Replace the main PCB ASSY.
Cause
Re-load the firmware.
Replace the main PCB ASSY.
2-53
LCD
Solution
LCD
Solution
Confidential