Brother PR-620 Clean the hook and the needle Skipped, Needle plate or in the hook Plate

Symptom	Probable Cause	Remedy	Reference Page
	The automatic needle-threading	Consult your nearest authorized
	mechanism is broken.	dealer.
	Adhesive is attached to the	Replace the needle.	p.63
	needle.
		Firmly set the fabric in the
	The fabric is not taut.	embroidery frame so that it is	p.28, 67
		taut.
		The thread quality is too weak
The upper thread	The thread quality is poor.	due to age of thread. Replace
		thread.
breaks.
	The embroidery data contains	Delete all stitches with a zero	p.150
	stitches with a pitch of zero.	pitch.
	The embroidery data contains	Delete all stitches with a small
	many stitches with an extremely		p.150
		pitch.
	small pitch.
	The thread density of the	Using a data design system,
	embroidery data is too fine.	correct the thread density and	p.100
	Three or more overlapping	overstitching settings in the
	stitches are being sewn.	embroidery data.
	The bobbin thread is not	Correctly thread the bobbin	p.19
	correctly threaded.	thread.
	The bobbin is scratched or does	Replace the bobbin.	p.18
	not rotate smoothly.
The bobbin
	The bobbin case is damaged.	Replace the bobbin case.	p.18
thread breaks.
	The thread is tangled.	Remove the thread jammed and	p.193
		clean the hook.
	A bobbin designed specifically	Use the correct bobbin.	p.15
	for this machine is not used.
	The upper thread is not threaded	Thread the upper thread	p.35
	correctly.	correctly.
	The needle is bent or blunt.	Replace the needle with a new	p.15, 63
		one.
	The needle is not installed	Correctly install the needle.	p.63
	correctly.
Stitches are
	Dust has accumulated under the	Clean the hook and the needle
skipped.			p.193, 194
	needle plate or in the hook.	plate.
	The needle and the hook are not	Consult your nearest authorized
	correctly passing each other.	dealer.
	The thread twist is either too	Improper twisting results in
		irregular loop formation. Try
	tight or too loose.
		using a new spool.
				7
	The thread is tangled.	Use tweezers to remove any
		tangled thread from the hook.
		If the fabric is not taut, the
The embroidery	The fabric is not well framed in	pattern may become misaligned
	the embroidery frame (for	or the stitching may shrink. Be	p.28, 67
pattern is
	example, the fabric is not taut).	sure to correctly frame the fabric
misaligned.
		in the embroidery frame.
	The embroidery frame is too	Use an embroidery frame that
	large for the size of the	matches the size of the	p.65
	embroidery.	embroidery.

Troubleshooting 203