Janome MB-4 manual Troubleshooting, Problem Cause Reference

Troubleshooting

Problem		Cause	Reference
The machine does not run.	1. The machine is not plugged in correctly.		See page 13.
	2.	The threads are jammed in the hook or	Remove jamming threads.
		around the take-up lever.
	3.	A confirmation message or an error message	Follow the message to turn
		is displayed.	it off.
	4.	The control system does not work correctly.	Turn the power off and turn
			it on again.
The machine is noisy.	1. Lint has accumulated in the hook.		See page 76.
	2.	The machine runs out of oil.	See page 78.
The needle thread breaks.	1. The needle thread is not threaded properly.		See page 19.
	2.	The needle thread tension is too tight.	See page 30.
	3.	The needle is bent or blunt.	See page 31.
	4.	The needle is not inserted properly.	See page 31.
	5. Stitch density is too dense.		Modify the pattern by using
			an embroidery software.
	6.	Poor quality threads are used.	Use a high quality threads.
	7.	The bobbin thread is not threaded properly.	See page 17.
The bobbin thread breaks.	1. The bobbin thread is not threaded properly.		See page 17.
	2.	Lint has accumulated in the hook.	See page 76.
	3.	The bobbin is not inserted into the bobbin	See page 17.
		case properly.
	4.	The bobbin or bobbin case has a scratch or	Replace the bobbin or
		nick.	bobbin case.
The needle breaks.	1. The needle is not inserted properly.		See page 31.
	2.	The needle is bent or blunt.	See page 31.
	3.	The needle clamp screw is loose.	See page 31.
	4.	The needle thread tension is too tight.	See page 30.
	5.	Stitch density is too dense.	Modify the pattern by using
			an embroidery software.
	7.	The needle thread is not threaded properly.	See page 19.
Skipped stitches	1. The needle is not inserted properly.		See page 31.
	2.	The needle is bent or blunt.	See page 31.
	3.	The needle thread is not threaded properly.	See page 19.
	4.	The fabric is not stretched tight enough in the	See page 22.
		hoop.
Embroidery pattern is	1. The needle thread tension is too tight.		See page 30.
distorted or not aligned.	2. The fabric is not stretched tight enough in the		See page 22.
		hoop.
	3. A stabilizer is not used.		See page 15.
	4.	The fabric is caught or trapped while stitching.	See page 27.
	5.	The threads are tangled on the bottom side of	Cut off and remove the
		the fabric.	tangled threads.
	6.	Short stitches are eliminated with the “Ignore	See pages 59, 67.
		short stitches” setting.
The tread forms loops.	1. The needle thread tension is too loose.		See page 30.
	2.	The bobbin is not inserted properly.	See page 17.
	3. A poor quality thread is used.		Use a high quality thread.

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