Brother PR655 Service Manual page 217

Test mode
3) Test mode Manual
This section primarily explains only the test modes used for checking the state of the sewing machine.
For more detailed descriptions of the test modes used for each adjustment, refer to the pages containing instructions for each
specific adjustment.
#07. Sensor test
The status of each sensor (including Encoder A, Encoder B, and Test SW) is
indicated using "H" or "L".
*Key point
• A buzzer goes off when the sensor status changes (excluding
Encoder A and Encoder B).
Although the current angle of the main shaft is displayed at the right side of
the "Motor angle".
*Key point
• "?" is displayed until the status of the Needle up sensor
changes after power has been turned on.
Adjust angle [OK]: Press the [OK] button of the "Adjust angle", and moves
the angle of the main shaft to the initial adjustment
position (approx. 350 deg.). (Not used)
#08. A/D conversion value test
The embroidery hoop holder type and the embroidery hoop type attached on
the sewing machine and the frame sensor A/D value are displayed.
[Hoop type]: The embroidery hoop type and the frame sensor A/D value are
displayed.
Selecting test mode
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