Troubleshooting

Problem

 

Cause

Reference

 

 

 

 

The fabric puckers.

1.

The needle thread tension is too tight.

See pages 30.

 

2.

The fabric is not stretched tight enough in the

See page 22.

 

 

hoop.

 

3. A stabilizer is not used.

See page 15.

 

 

 

 

The LCD screen is not clear.

1.

The brightness of the LCD screen is not

See pages 24, 61.

 

 

adjusted properly.

 

 

 

 

The touch panel keys do not

1.

The key position is out of alignment.

See page 62.

work correctly.

2.

The control system does not work correctly.

Turn the power off and

 

 

 

turn it on again.

 

 

 

 

The PC card or USB

1.

The PC card or USB memory is not inserted

See pages 73, 74.

memory does not work.

 

properly.

 

2.

The memory bank of teh PC card or USB

See pages 58, 64.

 

 

memory is damaged.

Communication with the PC

1. The USB cable is not connected properly.

See page 14.

does not work.

2.

The existing machine ID number is used.

See pages 57, 63.

 

 

 

 

The thread barkage warning

1.

The thread detector sensitivity is too sensitive.

See pages 59, 68.

appears though the thread

 

 

 

 

 

is not broken.

 

 

 

NOTE:

It is not abnormal that a slight humming sound is comming from the internal motors when the machine stands still.

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Janome MB-4 manual Troubleshooting