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 PC-420, PC-420PRW specifications

The Brother PC-420PRW and the PC-420 are versatile computerized sewing machines that cater to the needs of both beginner and advanced sewists. Known for their user-friendly design and advanced features, they deliver exceptional performance across a wide range of sewing applications.

One of the standout features of both models is their expansive selection of built-in stitches. The PC-420PRW boasts 294 unique stitch patterns, including quilting, decorative, and standard utility stitches, while the PC-420 offers a slightly lower count of 67 stitches. This variety allows users to explore their creativity and tackle diverse projects, from garment making to home décor.

Efficiency is enhanced by the automatic needle threader, a valuable addition that simplifies the threading process and minimizes frustration, especially for beginners. Furthermore, both machines incorporate an adjustable sewing speed control that allows users to dictate the pace of their work, providing greater precision for intricate tasks.

The Brother PC-420PRW and PC-420 are equipped with a spacious work area, making it easier to handle larger projects or bulky materials. Both models feature an integrated dual stich system, which enhances stitch quality and accuracy. This is particularly beneficial for quilting, as it ensures consistent results even on layered fabrics.

For sewing enthusiasts looking to personalize their projects, the machines come with a variety of included feet for different sewing techniques. From a walking foot for even feeding of multiple layers to a zigzag foot for decorative stitching, users have the right tools at their fingertips. The convenient LCD display screen on both models allows for easy navigation and selection of stitches, adjustments, and settings.

Another important aspect of these machines is their durability and build quality. Designed with sturdy components, they provide reliability and longevity, which are crucial for those who sew regularly. The lightweight design, paired with a built-in carrying handle, allows for easy transport, making them suitable for sewing classes or retreats.

In conclusion, the Brother PC-420PRW and PC-420 stand out in the sewing machine market with their extensive feature sets, user-friendly technology, and robust build. Whether you are a beginner looking to learn or an advanced sewist seeking sophisticated functionality, these machines are excellent choices that promise to enhance your sewing experience.

Brother PC-420PRW manual 138

Models: PC-420 PC-420PRW

Symptom

Probable Cause

Remedy

Reference

SEWING

PC-420, PC-420PRW specifications