Brother MFC-9130CW Service Manual page 83

■ Error code 4500
Replace Parts
Fuser Unit
Printable pages set for the fuser unit has reached the upper limit. (Printing is not stopped.)
Step
1 Main PCB failure if the error code
remains after replacing with a
new fuser unit and resetting the
fuser unit counter
■ Error code 4700
Replace Parts
WT Box End Soon
The waste toner sensor detected that the waste toner box is almost full.
Error code 4800
Replace WT Box
Replace the Waste Toner Box inside the machine. To get to it, remove all the
Drums & Toners then remove the Belt Unit.
After the waste toner sensor detected that the waste toner box was almost full, pages more
than the specified number have been printed.
<User Check>
- Replace the waste toner box.
Step
1 Dirt on the contact of waste toner
sensor in high-voltage power
supply PCB
2 High-voltage power supply PCB
failure
3 Main PCB failure
Cause
Cause
2-44
Remedy
Replace the main PCB ASSY.
Remedy
Clean the contact in the high-voltage
power supply PCB.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
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