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![](https://files.manualsfile.com/74631507-tj-4020tn/bg34.png)
48
Note
To select the sensor for calibration, send the correct command to the printer:
For the Gap Sensor: send the GAP command
For the Black Mark Sensor: send the BLINE command
For more information about the available commands, see the FBPL Command Reference on
your model's Manuals page at support.brother.com
.
Self-test
Print the printer configuration after you run Gap/Black Mark Sensor calibration. The self-test
printout lists the printer's configuration and available memory, and can indicate if there is any
dot damage on the heater component.
Self-test printout
Model name
Firmware version
Firmware checksum
Printer serial number
Configuration file
System date
System time
Printed mileage (meter)
Cutting counter
Print speed (inch/sec)
Print density
Label size (inch)
Gap distance (inch)
Gap/Black Mark Sensor
sensitivity
Code page
Country code
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