Brother PR600 Service Manual page 217

Test mode
9. [THREAD SET MOTOR TEST]
[MOVE ORIGIN POSITION]
[MOVE THREAD SET MOTOR] : Performs needle threading.
[CLOSE]
10. [SENSOR TEST]
The status of each sensor (including ENCODER A, ENCODER B, and TEST SW) is indicated using "H" or "L". 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 last line, '?' is displayed until the status of the NEEDLE UP
sensor changes after power has been turned on.
[INITIALIZE] : Moves the angle of the main shaft to the initial adjustment position (approx. 350 deg.).
[CLOSE] : Closes the <SENSOR TEST> screen.
11. [A/D TEST]
24V power supply voltage, 40V power supply voltage, frame sensor A/D value, and calculated results are displayed. The main
PCB mask program version and the check sum are also displayed.
[LL] : Saves the A/D value of the frame sensor at the LL frame attachment position.
[S] : Saves the A/D value of the frame sensor at the S frame attachment position
[CLOSE] : Closes the <A/D TEST> screen.
: Returns the thread motor to its origin.
: Closes the <THREAD SET MOTOR TEST> screen.
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