Brother 09055CDN Service Manual page 128

■ Error code C9
DIMM Error
Defective DIMM is installed.
<User Check>
- Replace the DIMM.
Step
1 Main PCB failure
■ Error code CA
Unusable Device
Remove the Device. Turn the power off and back on again.
USB device overcurrent error.
<User Check>
- Remove the USB device from the USB direct interface and turn OFF the power. After a
while, turn ON the power again.
- Replace the USB device with another one.
Step
1 USB host relay PCB failure
2 Main PCB failure
■ Error code CB
No Belt Unit
Open the Front Cover, pull out the Drum Unit completely and install the
Belt Unit.
The belt unit is not installed.
<User Check>
- Check if the belt unit is installed into the machine.
Step
1 Harness connection failure of
registration mark sensor holder
ASSY
2 Density sensor failure
3 Main PCB failure
Cause
Cause
Cause
2-89
Remedy
Replace the main PCB ASSY.
Remedy
Replace the USB host relay PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the
registration mark sensor holder ASSY and
reconnect it.
Replace the registration mark sensor
holder ASSY.
Replace the main PCB ASSY.
Confidential