138

APPENDIX —————————————————————————————————————————————————————

Symptom	Probable Cause	Remedy	Reference
	The upper thread was not threaded
	correctly (for example, the spool is	Remove any knots or tangles.	–	CONTENTS
	There are knots or tangles in the	Remove any knots or tangles.	–	CONTENTS
	not installed correctly, the spool cap	Correct the upper threading.	page 24
	is too big for the spool being used, or
	the thread has come out of the nee-
	dle bar thread hook).
	thread.

	The selected needle is not appropri-	Select a needle that is appropriate	page 33
	ate for the thread being used.	for the type of stitch being used.	page 33
	ate for the thread being used.	for the type of stitch being used.
	in the shuttle.	the shuttle.	page 54	GETTING
	The upper thread tension is too tight.	Loosen the upper thread tension.	page 54
	The thread is tangled, for example,	Remove the tangle thread. If the
	The thread is tangled, for example,	thread is tangled in the shuttle, clean	page 135
		thread is tangled in the shuttle, clean	page 135
The upper				READY
The upper	The needle is bent or blunt.	Replace the needle.
thread breaks.			page 34
thread breaks.
	The needle is incorrectly installed.	Correctly install the needle.
	The needle is incorrectly installed.	Correctly install the needle.

	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.		SEWING
	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.
				BASICS
	The shuttle is scratched, or has a	Replace the shuttle.	–	BASICS
	The shuttle is scratched, or has a	Contact your retailer or the nearest
	burr on it.	Contact your retailer or the nearest
	burr on it.	authorized service center.
		authorized service center.

	A bobbin designed specifically for	Incorrect bobbins will not work prop-
	A bobbin designed specifically for	erly. Only use a bobbin designed spe-	page 18
	this machine is not used.	erly. Only use a bobbin designed spe-	page 18	UTILITY
	this machine is not used.	Correctly install the bobbin thread.	page 22
	installed.	Correctly install the bobbin thread.	page 22
		cifically for this machine.
	The bobbin thread is incorrectly
				STITCHES
	The bobbin is scratched or does not	Replace the bobbin.	–	STITCHES
The lower	rotate smoothly, or has a burr on it.	Replace the bobbin.	–
The lower	rotate smoothly, or has a burr on it.
thread is tangled	The thread is tangled.	Remove the tangled thread and	page 135
or breaks.		Remove the tangled thread and
or breaks.		clean the shuttle.
		clean the shuttle.

	A bobbin designed specifically for	Incorrect bobbins will not work prop-
	A bobbin designed specifically for	erly. Only use a bobbin designed spe-	page 18
	this machine is not used.	erly. Only use a bobbin designed spe-	page 18
	this machine is not used.	cifically for this machine.
		cifically for this machine.		APPENDIX

	The upper thread was not threaded	Correct the upper threading.	page 24
	correctly.	Correct the upper threading.	page 24
	correctly.

	The bobbin thread is incorrectly	Correctly install the bobbin thread.	page 22
	installed.	Correctly install the bobbin thread.	page 22
	installed.

	The combination of fabric, thread	Select a thread and needle that are
	The combination of fabric, thread	appropriate for the type of fabric	page 33
	and needle is not correct.	appropriate for the type of fabric	page 33
	and needle is not correct.	being sewn.
The thread ten-		being sewn.

	The presser foot holder is incorrectly	Correctly install the presser foot
sion is incorrect.	The presser foot holder is incorrectly	Correctly install the presser foot	page 39
	installed.	holder.	page 39
	installed.	holder.
	The thread tension is incorrect.	Adjust the tension of the upper	page 54	INDEX
	The thread tension is incorrect.	Incorrect bobbins will not work	page 54	INDEX
		thread.
	A bobbin designed specifically for	properly. Only use a bobbin	page 18
	this machine is not used.	designed specifically for this	page 18
	this machine is not used.	designed specifically for this
		machine.

138 NX 400 specifications

The Brother NX 400 is a versatile and advanced sewing machine designed for both novice and experienced sewers. It stands out due to its combination of functionality, innovative features, and user-friendly interface. This machine is ideal for a wide array of sewing projects, including quilting, garment construction, and crafting.

One of the main attractions of the Brother NX 400 is its extensive range of built-in stitches. It boasts over 100 different stitch patterns, which include utility stitches, decorative stitches, and quilting stitches. This variety allows users to explore their creativity and tailor their projects to fit their personal style. The machine also features an automatic one-step buttonhole function, making it easy to create professional-looking buttonholes with consistent results.

While traditional sewing machines can be daunting for beginners, the NX 400 simplifies the learning process. It includes an intuitive LCD touch screen that provides clear navigation of the various functions and settings. This LCD screen allows users to easily select stitches, adjust stitch length and width, and even view a visual guide to help with thread tension adjustments. Users can quickly access tutorials and helpful tips for an enhanced sewing experience.

The Brother NX 400 incorporates advanced technology such as the Super Quick-Set bobbin system. This feature allows for easy bobbin insertion and ensures smooth and consistent sewing. The machine also includes an automatic needle threader, significantly reducing the time and frustration often associated with threading needles.

Another highlight of the NX 400 is its ability to handle various fabric types with ease. Whether working with lightweight silk or thicker materials like denim, this machine is equipped to deliver outstanding results. Its adjustable presser foot pressure allows for comprehensive control, ensuring uniform feeding of different fabrics.

Moreover, the Brother NX 400 is designed with convenience in mind. It includes a spacious work area and an array of accessories, such as various presser feet, a seam ripper, and quilting guides. The machine's lightweight and compact design make it portable, allowing users to bring their sewing projects to classes, workshops, or simply enjoy sewing at home without taking up too much space.

Overall, the Brother NX 400 is a reliable and feature-rich sewing machine that caters to a diverse range of sewing needs. With its blend of cutting-edge technology, user-friendly design, and creative capabilities, it is an excellent choice for anyone looking to elevate their sewing experience. Whether you are a beginner or an experienced sewist, this machine is sure to inspire creativity and produce high-quality results.

Brother NX 400 manual 138

Models: NX 400

Symptom

Probable Cause

Remedy

Reference

SEWING

NX 400 specifications