Brother HL-3040CN Service Manual page 107

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■ Error code C9
DIMM Error
Make sure that the DIMM is inserted correctly.
DIMM error
<
>
User Check
- Check if the DIMM is installed correctly.
- Replace the DIMM with a new one.
■ Error code CA
Unusable Device
Remove the Device. Turn the power off and back on again.
Excess current to USB device
<
>
User Check
- Remove the USB device from the USB direct interface and turn the power off. Turn it on
again after a while.
- Replace the USB device with other one.
Step
1
Harness connection failure of USB
direct interface relay PCB ASSY
2
USB direct interface relay PCB
failure
3
Main PCB failure
Cause
3-43
Remedy
Check the harness connection of the USB
direct interface relay PCB ASSY and
reconnect it.
Replace the USB direct interface relay
PCB ASSY.
Replace the main PCB ASSY.
Confidential

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