Janome MB-4S, Instruction Book

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88
Problem
The fabric puckers.
The LCD screen is not clear.
The touch panel keys do not
work correctly.
USB memory does not work.
Communication with the PC
does not work.
The thread breakage
warning appears though the
thread is not broken.
Cause
1. The needle thread tension is too tight.
2. The fabric is not stretched tight enough in the
hoop.
3. A stabilizer is not used.
1. The brightness of the LCD screen is not
adjusted properly.
1. The key position is out of alignment.
2. The control system does not work correctly.
1. USB memory is not inserted properly.
2. The memory bank of USB memory is
damaged.
1. The USB cable is not connected properly.
2. The existing machine ID number is used.
1. The thread detector sensitivity is too sensitive.
Reference
See pages 30.
See page 22.
See page 15.
See pages 24, 66.
See page 67.
Turn the power off and turn
it on again.
See page 80.
See page 68.
See page 14.
See pages 59, 67.
See pages 61, 72.
Troubleshooting
NOTE:
It is not abnormal that a slight humming sound is comming
from the internal motors when the machine stands still.
When the total running time of the DC motor reaches
1,000 hours, a message will appear advising you to
replace the DC motor.
If this message appears, contact the dealer from whom
this machine was purchased.
It is recommended to replace the motor before it comes
to the end of its operating life.
1
5
9
6
10
7
11
8
12
2 3 4
Replace the DC motor
(770610007)
DC Motor Replacement Message