Brother FAX-2840 Service Manual page 70

Error code 6A
Print Unable 6A
Turn the power off and then back on again.
The center thermistor of the fuser unit does not reach the specified temperature within the
specified time.
Error code 6B
Print Unable 6B
Turn the power off and then back on again.
The center thermistor of the fuser unit does not reach the specified temperature within the
specified time.
Error code 6C
Print Unable 6C
Turn the power off and then back on again.
The center thermistor of the fuser unit detected a temperature higher than the specified value.
Error code 6D
Print Unable 6D
Turn the power off and then back on again.
After the heat unit was heated normally, the center thermistor of the fuser unit detected a
temperature lower than the specified value.
Step
Connection failure of the fuser
1
unit harness
2 Fuser unit failure
Low voltage power supply PCB
3
failure
4 Eject sensor PCB failure
5 Main PCB failure
Error code 6E
This error does not usually occur in the normal use. The conceivable causes are noise
around the installation site, fluctuation of the power supply voltage, and failures in the
software.
---
An unidentified error occurred.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
Cause
Reconnect the fuser unit harness.
Replace the fuser unit.
Replace the low voltage power supply PCB
ASSY.
Replace the eject sensor PCB ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
2-33
Remedy
Remedy
Confidential