Brother MFC-7240 - Page 93

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Confidential
 Error code E1
Software bug
 Error code E2
When the center thermistor of the fuser unit is higher than the idle temperature, the side
thermistor detected a temperature higher than the specified temperature.
 Error code E3 and E4
These errors do 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.
Print Unable E1
Turn the power off and then back on again.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Print Unable E2
Turn the power off and then back on again.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step Cause Remedy
1
Connection failure of the center
thermistor or side thermistor
harness of the fuser unit
Reconnect the center thermistor or side
thermistor harness.
2
Side thermistor or center
thermistor failure
Replace the fuser unit.
3 Main PCB failure Replace the main PCB ASSY.
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<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.