Brother MFC-9130CW Service Manual page 108

■ Error code 9903
Registration failed
Press [OK], and try again.
Error occurred during patch data printing in adjustment of color registration.
<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 Registration mark sensor L/
registration mark sensor R dirty
2 Registration mark L PCB/
Registration mark R PCB
harness connection failure
3 Eject sensor PCB harness
connection failure
4 Failure in printed measurement
pattern image
5 Registration mark L failure
6 Registration mark R failure
7 Main PCB failure
Cause
2-69
Remedy
Clean the registration mark sensor L/
registration mark sensor R.
Check the registration mark L PCB/
registration mark R PCB harness
connection and reconnect it.
Check the eject sensor PCB harness
connection and reconnect it.
If failure occurs when printing "2D3S
YCMK_ _A" in "Function code
"4.3 Image Defect Troubleshooting" in this
chapter and take a measure.
Replace the registration mark L PCB
ASSY.
Replace the registration mark R PCB
ASSY.
Replace the main PCB ASSY.
71", refer to
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