Brother PR-620 operation manual 200, Upper thread is catching

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

Symptom Probable Cause Remedy Reference Page

The area around the embroidery foot hole is damaged.

Replace the presser foot.

1Consult your nearest authorized dealer.

1Scratches or Burrs

Sliding surface on hook race is not smooth. There are scratches or burrs on it.

1

Consult your nearest authorized dealer.

	1 Hook race area
	The hook is not correctly	Consult your nearest authorized
	installed.	dealer.
The needle	The hook stopper is not	Consult your nearest authorized
breaks.	correctly installed, the hook is	dealer.
	making a complete rotation.
		Pull the upper thread by hand
		from below the presser foot, and
	The upper thread is not threaded	check that the thread moves
		smoothly. If the thread does not
	correctly.
		move, it is not threaded	p.35-38
	The upper thread is catching
		correctly. Thread the upper
	somewhere.
		thread correctly. Make sure the
		thread is caught by the needle
		bar thread guide.
		Decrease the upper thread
	The upper thread tension is set	tension and make sure tension	p.86
	too high. It does not run.	disc rotate when pulling on
		thread.
	A bobbin designed specifically	Use the correct bobbin.	p.15
	for this machine is not used.
	The needle and the hook are not	Hook timing may be OFF.
		Consult your nearest authorized
	correctly passing each other.
		dealer.
	There is backlash play (forward/	Consult your nearest authorized
	backward) in the needle bar
		dealer.
	case.
	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.

200