25
Sewing lamp and LCD backlight lit. LCD
displays “01”.
Buzzer sounds. LCD displays symbols and
numbers in order. LCD repeats displaying
after all symbols and numbers are shown.
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.
Press buttons 1– 6.
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.
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.
1
4
3
2
5 6
SELF-DIAGNOSTIC TEST
01)
FUNCTION OF
LCD, BUZZER
AND LAMP
PROCEDURE
STEP AND
ITEMS
TO CHECK
CORRECT CONDITION
BH symbol
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.
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.
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.
04)
BOBBIN
WINDER
SWITCH
03)
BUTTONHOLE
SENSOR
02)
BUTTON
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 circuit board A.
Buzzer does not sound.
LCD does not display the number
correctly.
–REMEDY–
Replace the circuit board A.
Replace the circuit board F.
Buzzer does not sound.
BH symbol does not appear.
–REMEDY–
Replace the circuit board A.
Replace the circuit board F.
Bobbin
symbol
Buzzer does not sound.
Bobbin symbol is not displayed.
–REMEDY–
Replace the circuit board A.
Replace the circuit board F.
DEFECTIVE CONDITION