Brother HL-4050CDN - Page 41

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Error code 81
Calibrate
Calibration failed. See Troubleshooting chapter in User’s Guide.
Incorrect density sensor measurement value when implementing calibration from the control
panel.
Error code 82
Calibrate
Calibration failed. Press Go, and try again.
Density patch measurement is not completed normally when implementing calibration from the
control panel.
User Check
- Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit
with a new one.
- Check if the genuine toner cartridges are installed in the correct order of colors.
Step Cause
Remedy
1 Density sensor shutter
catching on some position
Correct catching of the density sensor shutter.
2 Harness connection failure of
density sensor holder ASSY
Check the harness connection of the density
sensor holder ASSY and reconnect it.
3 Density sensor failure Replace the density sensor holder ASSY.
4 Transfer HVPS PCB failure Replace the transfer HVPS PCB ASSY.
5 Engine PCB failure Replace the engine PCB ASSY.