Brother NX-450, N5V operation manual Troubleshooting, the LCD

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Symptom	Probable Cause	Remedy	Reference
	Dust has accumulated in the feed	Clean the race.	page 142
	dogs or in the bobbin case.
	The upper thread was not threaded	Correct the upper threading.	page 28
	correctly.
A high-pitched
	The bobbin case is scratched, or has	Replace the bobbin case. Contact
noise is made while
		your dealer or the nearest	–
sewing.	a burr on it.
		authorized service center.
		Incorrect bobbins will not work
	A bobbin designed specifically for	properly. Only use a bobbin	page 22
	this machine is not used.	designed specifically for this
		machine.
The needle threader	The needle has not been raised to the	Press the “Needle Position”	page 31
	correct position.	button.
cannot be used.
	The needle is incorrectly installed.	Correctly install the needle.	page 39
	The presser foot that is used is not	Attach the presser foot that is
	appropriate for the type of stitch that	appropriate for the type of stitch	page 134
	you wish to sew.	that you wish to sew.		4
The stitch is not
	The thread tension is incorrect.	Adjust the tension of the upper	page 57
sewn correctly.		thread.
	The thread is tangled, for example, in	Remove the tangle thread. If the
		thread is tangled in the bobbin	page 142
	the bobbin case.
		case, clean the race.
		Slide the drop feed lever to the
	The feed dogs are lowered.	right. (as seen from the rear of the	page 104
		machine)
	The stitch is too short.	Lengthen the stitch length.	page 59
	The presser foot that is used is not	Attach the presser foot that is
The fabric does not	appropriate for the type of stitch that	appropriate for the type of stitch	page 134
	you wish to sew.	that you wish to sew.
feed.
	The pressure of the presser foot is	Turn the presser foot pressure dial
		to the left to increase the pressure	page 43
	weak.
		of the presser foot.
	The thread is tangled, for example, in	Remove the tangle thread. If the
		thread is tangled in the bobbin	page 142
	the bobbin case.
		case, clean the race.
The sewing lamp	The sewing lamp is damaged.	Contact your dealer or the nearest	–
does not come on.		authorized service center.
Nothing appears in	The brightness of the LCD is either	Adjust the brightness of the LCD.	page 149
the LCD.	too light or too dark.

Troubleshooting 147