20
Correct Condition
LCD displays “SC 05”.
Buzzer sounds when presser foot lifter is
raised or lowered.
The presser foot symbol appears when
the foot lifter is lowered.
Step and
items to check
05)
Presser foot
lifter switch
Procedure
Raise or lower the preser foot lifter.
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
Buzzer does not sound.
The presser foot symbol
does not appear when the
presser foot is lowered, or
does not disappear when
the presser foot is raised.
–REMEDY–
Replace the circuit board A.
Replace the presser foot
lifter switch.
Adjust the presser foot lifter
switch position.
Turn the handwheel toward you.
Lower the needle bar from its highest
to its lowest position.
Raise the needle bar from its lowest
position to its highest position.
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.
Bobbin symbol
Buzzer does not sound.
Stitch width or length symbol
does not appear.
–REMEDY–
Replace the circuit board A.
Replace the circuit board P.
Zigzag motor does not get
default position.
–REMEDY–
Replace the zigzag motor.
Replace the circuit board A.
Feed motor does not get
default position.
–REMEDY–
Replace the feed motor.
Replace the circuit board A.
06)
Upper shaft
positioning
sensor
07)
Zigzag motor
(Step motor)
Feed motor
Turn the handwheel toward you.
Lower the needle bar from its highest
to its lowest position.
Raise the needle bar from its lowest
position to its highest position.
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.
LCD displays “SC 06”.
Turn the handwheel.
LCD displays stitch width symbol when
the needle bar is at zigzag phase.
LCD displays stitch length symbol when
the needle bar is at feed phase.
Presser foot
symbol
Stitch width
symbol
Stitch length
symbol
LCD displays “SC 07”.
LCD displays stitch width symbol when
the needle bar is at middle position.
(Zigzag motor get default position.)
LCD displays stitch length symbol when
feed motor gets default position.
Stitch length
symbol
Stitch width
symbol
Self-diagnostic Test
