18
Correct Condition
Sewing lamp and LCD backlight lits. LCD
displays “01”.
01)
Function of
LCD, buzzer
and lamp
Procedure
Turn on the power switch while
simultaneously pressing the start/stop
button and locking stitch button.
Press the start/stop button.
If the result is correct condition, press
the start/stop button to proceed the
next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
Defective Condition
Sewing lamp does not lit.
LCD backlight does not lit.
LCD does not display “01”.
Buzzer does not sound.
LCD does not turned on.
LCD does not display any symbols
or not in order.
–REMEDY–
Replace the printed circuit board A.
Buzzer sounds. LCD displays symbols and
numbers in order. LCD repeats displaying
after all symbols and numbers are shown.
Press buttons 1 to 6.
LCD displays “SC 02”.
Buzzer sounds when button is pressed. Button
number is displayed when the button is pressed.
LCD displays “S3” when button 1 is pressed.
LCD displays “S4” when button 2 is pressed.
LCD displays “S5” when button 3 is pressed.
LCD displays “S6” when button 4 is pressed.
LCD displays “S8” when button 5 is pressed.
LCD displays “S9” when button 6 is pressed.
LCD displays “SC 03”.
When the buttonhole lever is pulled, buzzer
sounds and LCD displays BH symbol.
When the buttonhole lever is pushed, buzzer
sounds and LCD displays BH symbol.
BH symbol
Bobbin symbol
If the result is correct
condition, press the start/stop
button to proceed the next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
Lower the buttonhole lever.
Move the buttonhole lever back and
forth.
If the result is correct
condition, press the start/stop button
to proceed the next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
Move the bobbin winder spindle to the
right.
Return it to the left.
If the result is correct
condition, press the start/stop button
to proceed the next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
1
4
3
2
5 6
02)
Button
03)
Buttonhole
Sensor
SELF-DIAGNOSTIC TEST
Step and items
to check
04)
Bobbin
winder
switch
LCD displays "SC 04".
When the bobbin winder spindle is moved to
the left, buzzer sounds.
When the bobbin winder spindle is moved to
the right, buzzer sounds and LCD displays
the bobbin symbol.
Buzzer does not sound.
LCD does not display the number
correctly.
–REMEDY–
Replace the printed circuit board A.
Replace the printed circuit board F.
Buzzer does not sound.
BH symbol does not appear.
–REMEDY–
Replace the printed circuit board A.
Adjust the button hole lever position
Replace the button hole sensor.
Buzzer does not sound.
Bobbin symbol is not displayed.
–REMEDY–
Replace the bobbin winder switch.
Replace the printed circuit board A.
