Brother Z-8550A 3-6.Checking input and output, 3-6-2.Input and output check list, 3-6-1.Input and output checking method, 3. FUNCTION SETTINGS

3. FUNCTION SETTINGS

3-6. Checking input and output

Use this to check for any malfunctions of the operation panel keys, circuit boards or sensors, and for checking for broken cords and for adjusting sensor positions.

You can check whether the CPU is correctly reading the signals from keys and sensors.

3-6-1. Input and output checking method

1	While holding down the TEST key on the operation panel, turn on the power switch (1).
	* After the following display appears, keep the TEST key pressed down until the buzzer makes a short beep.

	0176B
2	Check the responses from the keys and sensors while referring to “3-6-2. Input and output check list”.
3	To return to normal operation mode, turn the power switch off and then turn it back on again.
3-6-2. Input and output check list
Needle position, zigzag position and switch operation

	Operation block	Operation panel	Check item and checking method
		indicator block
Needle	Needle up signal - ON	Needle up icon	Needle up signal ON/OFF position for upper shaft motor;
			Turn the pulley by hand.
position
			Needle down signal ON/OFF position for upper shaft
signal	Needle down signal - ON	Needle down icon
			motor; Turn the pulley by hand.
			Home position signal ON/OFF position for needle zigzag
		Zigzag	motor
	Z phase signal - ON	width/reference	Signal should turn ON/OFF near the needle bar center
Needle		line LED	position when the needle bar is turned by hand to the left
			and right.
zigzag
			A phase ON/OFF position for needle zigzag motor
position
	A phase signal - ON	Left stop LED	Signal should turn ON/OFF when the needle bar is turned
signal
			by hand to the left and right.
			B phase signal ON/OFF position for needle zigzag motor
	B phase signal - ON	Right stop LED	Signal should turn ON/OFF when the needle bar is turned
			by hand to the left and right.
	Actuator switch - ON	Correction stitch	Correction stitch icon should turn ON when the actuator
		icon	switch is pressed.
Switch	Machine head tilt detection	TEST icon	When the machine head is tilted back, the TEST icon
	Switch - ON		turns ON.
	Knee switch - ON	Slow start icon	When the knee switch is pressed, the slow start icon
			turns ON.

19 Z-8550A, 8560A