Brother MFC-7290 - Page 73

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 Error code 75
The internal temperature thermistor detected a temperature higher than the specified value.
 Error code 76
The center thermistor of the fuser unit detected a temperature rise greater than the specified
value within the specified time.
Error code 78
The center thermistor of the fuser unit detected a temperature fall greater than the specified
value within the specified time.
 Error code 7A
Cannot detect the synchronized signal of the main motor. The speed of the main motor does
not stabilize within the specified time.
Cooling Down
Wait for a while
<User Check>
• Leave the machine for a while as the power remains ON.
Step Cause Remedy
1
Internal temperature thermistor
failure
Replace the internal temperature thermistor.
2 Main PCB failure Replace the main PCB ASSY.
Print Unable 76
Turn the power off and then back on again.
Print Unable 78
Turn the power off and then back on again.
Step Cause Remedy
1 Fuser unit failure Replace the fuser unit.
2
Low voltage power supply PCB
failure
Replace the low voltage power supply PCB
ASSY.
3 Eject sensor PCB failure Replace the eject sensor PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Print Unable 7A
Turn the power off and then back on again.
Step Cause Remedy
1
Connection failure of the main
motor flat cable
Reconnect the main motor flat cable.
2 Main motor failure Replace the main motor.
3
Low voltage power supply PCB
failure
Replace the low voltage power supply PCB
ASSY.
4 Main PCB failure Replace the main PCB ASSY.