Brother DCP-9010CN Service Manual page 128

■ Error code 81
Calibrate
Calibration failed. See Troubleshooting chapter in User's Guide.
Incorrect density sensor measurement value when implementing adjustment of color density
from the control panel cover ASSY.
Error code 82
Calibrate
Calibration failed. Press Start, and try again.
Density patch measurement is not completed normally when implementing adjustment of color
density from the control panel cover ASSY.
<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
1 Density sensor shutter catching
on some position
2 Harness connection failure of
registration mark L PCB ASSY
3 HVPS control PCB failure
4 Engine PCB failure
5 Main PCB failure
6 Registration mark L PCB failure
Cause
3-36
Remedy
Correct catching of the density sensor
shutter.
Check the harness connection of the
registration mark L PCB ASSY and
reconnect it.
Replace the HVPS control PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Replace the registration sensor holder
ASSY.
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