Brother MFC-8370DN - DIMM Error; Excess Current to USB Device; USB Host

3-36
Confidential
■ Error code C9
The failed DIMM is installed, or the DIMM is not installed correctly.
■ Error code CA
Excess current to USB device
■ Error code CD
Drum unit is not installed into the machine
DIMM Error
Make sure that the DIMM is inserted correctly.
<User Check>
• Install the DIMM correctly.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Unusable Device
Remove the Device. Turn the power off and back on again.
<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 another one.
Step Cause Remedy
1
Harness connection failure of USB
host relay PCB ASSY
Check the harness connection of the USB
host relay PCB ASSY and reconnect it.
2 USB host relay PCB failure Replace the USB host relay PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
No Drum Unit
Install the Drum Unit.
<User Check>
• Check if the drum unit is installed into the machine.
Step Cause Remedy
1
Dirt on electrodes on drum unit
and machine body
Clean both electrodes.
(Refer to Fig. 3-2, Fig. 3-3)
2 HVPS PCB unit failure Replace the HVPS PCB unit.
3 Main PCB failure Replace the main PCB ASSY.