SERVICE MANUAL
29
LOCATING THE DEFECTED ELECTRICAL PART
1. To turn off the audible beep
2. The self-diagnostic program
This machine has the self-diagnostic program to locate
the defected electronic part.
If your machine functions are not normally, run this
program.
1. Turn off the power switch and push the bobbin winder
spindle to the right.
2. Turn on the power switch with pressing the reverse
button. The self-diagnostic screen will appear.
3. When this program has started correctly, the LCD will
indicate the conditions of each electrical part as
illustration.
4. See next page to check each electrical part.
5. To quit this program, turn off the power switch.
1
2
3
You can turn off the audible beep.
1. Touch the setting button at home screen.
2. To turn off the beep, touch the left side of button (a).
To turn on the beep, touch the right side of button (b).
3. Touch home (c) or return (d) button to return the home
screen.
This setting is kept until you change it.
a
b
c
d
3
+
2
1
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