Brother PR-620 operation manual Dealer Bent, Thread Embroidering Short Begins

Symptom	Probable Cause	Remedy	Reference Page
		If the thread tension cannot be
	The thread tension does not	adjusted, thread wax and dust
		may have collected in the upper
	correspond to the amount that
		or middle thread guide plates,
	the thread tension knob was
		causing the thread tension guide
	tightened.
		plates to rise. Clean the thread
There are loops in
		tension guide plates.
the upper thread.
		Try sewing with different thread.
		If the problem no longer occurs
	The thread quality is poor.	after the thread is changed, the
		thread quality is the problem.
		Replace the thread with one of
		good quality.
	Lint may be wound in the hook.	Clean the hook.	p.193
	The upper thread is not threaded	Check the thread path, and then	p.35
	correctly.	thread the upper thread again.
The machine is
		Replace the hook.
noisy.	The hook is damaged.
		Consult your nearest authorized
		dealer.
	Not enough oil was applied.	Oil recommended parts.	p.196
		Touch the key to move the
	The needle is not at the correct	desired needle bar to be	p.40
	position.	threaded into embroidering
		position.
The needle	Recommended needles are not	Replace and use recommended	p.15, 63
threader cannot	used on this machine.	needle.
be used.	The needle is not installed	Correctly install the needle.	p.15, 63
	correctly.
	The hook on the automatic	Consult your nearest authorized
	needle-threading mechanism is		p.15, 63
		dealer.
	bent.
	The upper thread is not threaded	Check the thread path, and then	p.35
	correctly.	thread the upper thread again.
The thread
	The bobbin thread is not	Correctly thread the bobbin
tension is			p.19
	correctly threaded.	thread.
incorrect.
	The lower thread tension is	Adjust the tension of the bobbin	p.85
	incorrect.	thread.
The upper thread	If a short length of thread	Set the remaining length of
comes out of the	remains after the thread is
		thread to “LONG TAIL” on the
needle when	trimmed, the needle may		p.150
		second page of the settings
embroidering	become unthreaded when
		screen.
begins.	embroidering begins again.
The upper thread	There is no more thread in the			7
does not reach the	bobbin, the thread does not feed
bobbin thread	from the bobbin, or the thread	Correctly thread the lower	p.19
when	that is fed from the bobbin is too	thread.
embroidering	short.
begins.

Troubleshooting 205