Brother CS-770 operation manual Lower, Or breaks, Thread ten, Fabric is, Wrinkled

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

Symptom	Possible cause	How to put it right	Reference
	You have not inserted the needle	Insert the needle properly.	page 21
	properly.
	The area around the hole in the nee-	Replace the needle plate.	–
	dle plate is scratched.	Contact your retailer or the nearest
		authorised service center.
	The area around the hole in the	Replace the presser foot.
The upper		Contact your retailer or the nearest	–
	presser foot is scratched.
thread breaks.		authorised service center.
	The bobbin case is scratched, or has	Replace the bobbin case.
		Contact your retailer or the nearest	–
	a burr on it.
		authorised service center.
	You have not used a bobbin that has	Incorrect bobbins will not work
		properly. Only use a bobbin that has	page 11
	been designed for this machine.
		been designed for this machine.
	You have not wound the bobbin	Wind the bobbin thread properly.	page 11
	thread properly.
	The bobbin is scratched or does not	Replace the bobbin.	–
	turn smoothly.
The lower
	The thread is tangled.	Remove the tangled thread and	page 57
thread is tangled
		clean the bobbin case.
or breaks.
	You have not used a bobbin that has	Incorrect bobbins will not work
		properly. Only use a bobbin that has	page 11
	been designed for this machine.
		been designed for this machine.
	Bobbin is set incorrectly.	Reset the bobbin thread correctly.	page 14, 15
	You have not threaded the upper	Correct the upper threading.	page 16
	thread properly.
	You have not wound the bobbin	Wind the bobbin thread properly.	page 11
	thread properly.
	You have not threaded the right	Choose a thread and needle that are
	combination of thread and needle		page 20
		appropriate for the type of fabric.
	for the fabric you are using.
The thread ten-
	You have not attached the presser-	Attach the presser-foot holder prop-
sion is incorrect.			page 25
	foot holder properly.	erly.
	The thread tension is incorrect.	Adjust the tension of the upper	page 29
		thread.
	You have not used a bobbin that has	Incorrect bobbins will not work
		properly. Only use a bobbin that has	page 11
	been designed for this machine.
		been designed for this machine.
	Bobbin is set incorrectly.	Reset the bobbin thread correctly.	page 14, 15
	You have not threaded the upper	Thread the upper thread and wind	page 14, 15, 16
	thread properly or fitted the bobbin
		the bobbin thread properly.
	properly.
	You have not fitted the spool prop-	Fit the spool properly.	–
	erly.
The fabric is	You have not used the right	Choose a thread and needle that are
	combination of fabric, thread and		page 20
		appropriate for the type of fabric.
wrinkled.	needle.
	The needle is bent or blunt.	Replace the needle.	page 21
	If you are sewing thin fabric, the	Sew with stabiliser material under	page 31
	stitch is too thick.	the fabric.
	The thread tension is incorrect.	Adjust the tension of the upper	page 29
		thread.

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