Brother HL-L9300CDW Service Manual page 104

■
Error code EC00
Unusable Device
Remove the Device. Turn the power off and back on again.
Overcurrent was caused because a USB device that did not meet the specifications was
inserted into the USB port.
< User Check >
- Remove the USB device from the USB port and turn the power OFF. Turn it ON again after a
while.
- Replace the USB device with another one.
Step
1 USB host relay PCB failure
2 Main PCB failure
■
Error code F900
Machine Error F9
-
Setting by spec code is not entered.
Step
1 During function code 74, power
is turned OFF.
2 Main PCB failure
Cause
Replace the USB host relay PCB ASSY.
Replace the main PCB ASSY.
Cause
Enter the Setting by spec code again.
(Refer to
"1.3.23 Setting by country (Function code
74)" in Chapter
Replace the main PCB ASSY.
2-84
Remedy
Remedy
5.)
Confidential