Brother HL-L8250CDN Service Manual page 94

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Error code 9803
Calibrate
Calibration failed. Press Go, and try again.
Density patch measurement ended unsuccessfully during color density adjustment performed
from the control panel.
Error code 9804
Calibrate
Calibration failed. Press Go, and try again.
Error occurred with the value measured during density sensor sensitivity calibration.
< User Check >
- Check if the toner cartridges are set in the correct order of colors.
- Replace the toner cartridge.
- Replace the drum unit.
- If the belt unit has a scratch, replace it.
- If "WT Box End Soon" is displayed on the LCD and the belt unit has dirt, replace the waste
toner box.
Step
1 Dirt on the registration mark
sensor L
2 Failure in printed measurement
pattern image
3 Connection failure of the
registration mark sensor L PCB
harness
4 Density sensor failure
5 Main PCB failure
Cause
2-71
Remedy
Clean the registration mark sensor L.
If failure occurs when printing "2D3S
YMCBWKW_A" in "Function code
refer to
"4.3 Troubleshooting for Image Defects" in
this chapter and take a measure.
Reconnect the registration mark sensor L
PCB harness.
Replace the registration mark sensor unit.
Replace the main PCB ASSY.
71",
Confidential