Brother P-touch QL-710W Service Manual page 92

(3) Insert the release coated paper of the die-cut label (62mm x 100mm) for sensor
reference value measurement into the machine. (Peel the label.)
Release coated paper
Fig. 2 Insert position of release coated paper
(4) Check that the background of "VR adjustment" is yellow, and click the [Run]
button.
(5) Check the VR value displayed in the "Results" field.
The VR value is normal when it is within the pass range (218 to 222). Check that
"OK" is displayed in the "Results" field, and quit VR adjustment.
Tape sensor PCB ASSY
Fig. 3 Starting of VR adjustment
Fig. 4 VR adjustment OK
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Upper cover