Brother DCP-7055 Service Manual page 103

■ 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.
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Error, which cannot be specified, occurs.
<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.
Program error. (An error occurred in the ROM checksum.)
Step
1 Firmware update failure
2 Main PCB failure
■ Error code E1
Print Unable E1
Turn the power off and then back on again.
Program error.
Step
1 Main PCB failure
Cause
Cause
Cause
2-66
Remedy
Replace the main PCB ASSY.
Remedy
Upload the latest firmware.
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
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