Brother MFC-8540DN Service Manual

2-81
Confidential
 Error code EC00
A USB device not within the specification is connected to the USB terminal, resulting in over
current.
 Error code ED00
Failed to authenticate the firmware for the self test.
Error code EE00
Failed to authenticate the NVRAM for the self test.
 Error code F900
The spec code was not entered correctly.
<User Check>
• Disconnect the USB device from the USB flash memory port and turn the machine OFF.
Turn the machine ON again after a while.
• Replace the USB device with a different one.
Step Cause Remedy
1 USB host PCB failure Replace the USB host PCB ASSY.
2 Main PCB failure Replace the main PCB ASSY.
<User Check>
• Turn the power switch OFF and then ON again.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1
The power was turned OFF
while function code 74 was
running.
Reenter the spec code.
2 Main PCB failure Replace the main PCB ASSY.

Brother MFC-8540DN Specifications

General

Brand	Brother
Model	MFC-8540DN
Category	All in One Printer
Language	English