Brother DCP-L5500D Service Manual page 116

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