Brother DCP-L8400CDN Service Manual page 102

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Error code 9801
Calibration
Calibration failed. Turn the power off and then back on again.
Error occurred with the value measured during color density adjustment performed from the
control panel.
< 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
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Error code 9802
Calibration
Calibration failed. Insufficient Toner for Calibration.
Dot counter or develop roller counter of color toner has reached the upper limit during color
density adjustment performed from the control panel.
< User Check >
- Replace the corresponding toner cartridge.
Step
1 Main PCB failure
Cause
Clean the registration mark sensor L.
If failure occurs when printing "2D3S
YMCBWKW_A" in
refer to
"4.3 Troubleshooting for Image Defects" in
this chapter
Reconnect the registration mark sensor L
PCB harness.
Replace the registration mark sensor unit.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
2-72
Remedy
"Function code 71",
and take a measure.
Remedy
Confidential