Brother MFC-9320CW Service Manual page 133

■ Error code EF
Print Unable EF
Turn the power off and then back on again.
Low-voltage power supply PCB failure
(It is detected that the average coverage value suddenly becomes 0 %.)
<User Check>
- Turn the power off. Turn it on again after a while.
Step
1 Low-voltage power supply PCB
failure
2 Main PCB failure
■ Error code F2
WT Box End Soon
The waste toner box near full.
(Cleaning high voltage discharge due to reaching the life of the cleaning roller)
Note:
The same message appears in the case of the error code 5F.
<User Check>
- Prepare a new waste toner box.
Step
1 HVPS control PCB failure
2 Engine PCB failure
Cause
Cause
3-52
Remedy
Replace the low-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Remedy
Replace the HVPS control PCB ASSY.
Replace the engine PCB ASSY.
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