Brother DCP-9055CDN Service Manual page 137

■ Error code F3
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Main PCB error.
Error code F4
High Temperature
Decrease room temperature and humidity to allow the machine to operate.
The waste toner box is at the end of life.
Error code F5
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Main PCB communication error.
Error code F6
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P.C.I error.
Error code F8
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Battery connection error.
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.
<User Check>
- Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
Cause
2-99
Remedy
Replace the main PCB ASSY.
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