Brother MFC-9130CW Service Manual page 84

■ Error code 4B01
Toner Low
Prepare New Toner Cartridge.
Dot counter of the toner cartridge (Black) or develop roller counter reaches the upper limit
soon.
Error code 4B02
Toner Low
Prepare New Toner Cartridge.
Dot counter of the toner cartridge (Yellow) or develop roller counter reaches the upper limit
soon.
Error code 4B03
Toner Low
Prepare New Toner Cartridge.
Dot counter of the toner cartridge (Magenta) or develop roller counter reaches the upper limit
soon.
Error code 4B04
Toner Low
Prepare New Toner Cartridge.
Dot counter of the toner cartridge (Cyan) or develop roller counter reaches the upper limit
soon.
<User Check>
- Prepare a new toner cartridge.
Step
1 Main PCB failure if the error code
remains after replacing with a
new toner cartridge and resetting
the toner counter
Cause
2-45
Remedy
Replace the main PCB ASSY.
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