Brother FAX-2840 Service Manual page 92

Error code DE
Print Unable DE
Turn the power off and then back on again.
When the center thermistor of the fuser unit is higher than the idle temperature, the side
thermistor detected a temperature lower than the specified temperature.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step
Connection failure of the center
1 thermistor or side thermistor
harness of the fuser unit
Side thermistor or center
2
thermistor failure
3 Eject sensor PCB failure
4 Main PCB failure
Error code DF
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
Error code E0
Print Unable E0
Turn the power off and then back on again.
An error occurred in the ROM check sum.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step
1 Firmware installation failure
2 Main PCB failure
Cause
Reconnect the center thermistor or side
thermistor harness.
Replace the fuser unit.
Replace the eject sensor PCB ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
Cause
Reinstall the latest firmware.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
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