20
CORRECT CONDITION
STEP AND
ITEMS TO
CHECK
05)
PRESSER
FOOT
LIFTER
SWITCH
PROCEDURE
DEFECTIVE CONDITION
Turn the handwheel toward you.
Lower the needle bar from its
highest to lowest position.
Raise the needle bar from its
lowest position to 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.
Buzzer does not sound.
Stitch width or length
symbol does not appear.
–REMEDY–
Replace the circuit board P.
Replace the circuit board A.
Zigzag motor does not get
default position.
buzzer does not sound.
–REMEDY–
Replace the zigzag motor.
Replace the circuit board A.
Feed motor does not get
default position.
buzzer does not sound.
–REMEDY–
Replace the feed motor.
Replace the circuit board A.
06)
UPPER SHAFT
POSITIONING
SENSOR
07)
ZIGZAG MOTOR
(STEP MOTOR)
AND
FEED MOTOR
Turn the handwheel toward you.
Lower the needle bar its highest
to position (zigzag phase).
Press the needle up/down button.
Raise the needle bar from its
lowest position to its highest
position (feed phase).
Press the needle up/down 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.
LCD displays “SC 06--”.
Turn the handwheel.
LCD displays stitch width symbol
when the needle bar is at zigzag
phase.
LCD displays “SC 07--”.
Press the needle up/down button
when LCD displays stitch width
symbol.
The Zigzag motor will be initialized
and get its default position.
SELF-DIAGNOSTIC TEST
Not applicable for this machine.
Press the start/stop button to
proceed the next step.
LCD displays “SC 05--” and presser
foot symbol.
Presser
foot
symbol
Press the needle up/down button
when LCD displays stitch length
symbol.
The feed motor will be initialized and
get its default position.
Stitch
width
symbol
Stitch
length
symbol
LCD displays stitch length symbol
when the needle bar is at feed phase.
Stitch
width
symbol
Stitch
length
symbol
