Brother NX 400 manual Troubleshooting

Troubleshooting

If the machine stops operating correctly, check the following possible problems before requesting service. If the problem persists, contact your retailer or the nearest authorized service center.

Symptom	Probable Cause	Remedy	Reference
	The machine is not turned on.	Turn on the machine.	page 11
	The start/stop button was not	Press the start/stop button.	page 49
	pressed.
The sewing
	The presser foot lever is raised.	Lower the presser foot lever.	–
machine does
not operate.
	The start/stop button was pressed,	Do not use the start/stop button
		when the foot controller is con-
	even though the foot controller is		page 49
		nected. To use the start/stop button,
	connected.
		disconnect the foot controller.
	The needle is incorrectly installed.	Correctly install the needle.
	The needle clamp screw is loose.	Use the screwdriver to firmly tighten	page 35
		the screw.
	The needle is bent or blunt.	Replace the needle.
	The combination of fabric, thread	Select a thread and needle that are
		appropriate for the type of fabric	page 33
	and needle is not correct.
		being sewn.
	The presser foot that is used is not	Attach the presser foot that is appro-
	appropriate for the type of stitch that	priate for the type of stitch that you	page 128
	you wish to sew.	wish to sew.
	The upper thread tension is too tight.	Loosen the upper thread tension.	page 54
The needle	The fabric is pulled too much.	Lightly guide the fabric.	–
	The spool is incorrectly installed.	Correctly install the spool.	page 24
breaks.
	The area around the hole in the nee-	Replace the needle plate.	–
	dle plate is scratched, or has a burr	Contact your retailer or the nearest
	on it.	authorized service center.
	The area around the hole in the	Replace the presser foot.	–
	presser foot is scratched, or has a	Contact your retailer or the nearest
	burr on it.	authorized service center.
	The shuttle is scratched, or has a	Replace the shuttle.	–
		Contact your retailer or the nearest
	burr on it.
		authorized service center.
		Incorrect bobbins will not work
	A bobbin designed specifically for	properly. Only use a bobbin	page 18
	this machine is not used.	designed specifically for this
		machine.

CONTENTS GETTING READY SEWING BASICS UTILITY STITCHES APPENDIX

INDEX

Troubleshooting 137