Brother HL-L9300CDW Service Manual page 279

2. IF YOU REPLACE THE REGISTRATION
MARK SENSOR UNIT
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What to do after replacement
- Continuous Adjustments of Density and Registration Sensor (Function code 73)
2.1 Continuous Adjustments of Density and Registration
Sensor (Function code 73)
Perform continuous adjustments of density and registration sensor in accordance with
Continuous adjustments of density and registration sensor (Function code 73)" in Chapter
4-7
"1.3.22
5.
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