20
CORRECT CONDITION
STEP AND
ITEMS TO
CHECK
05)
UPPER SHAFT
POSITIONING
SENSOR
PROCEDURE
DEFECTIVE CONDITION
Turn the handwheel toward you.
Lower the needle bar to its lowest
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 MODE key to proceed
the next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
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 zigzag width
motor.
Replace the feed motor.
Replace the circuit board A.
Buzzer does not sound.
Stitch width or length
symbol does not appear.
–REMEDY–
Replace the circuit board A.
06)
ZIGZAG
MOTOR
(STEP MOTOR)
AND
FEED MOTOR
LED displays “5 ”.
Turn the handwheel.
LED displays the top bar symbol
when the needle bar is at zigzag
phase.
Press the needle up/down button
when LED displays top bar symbol.
The Zigzag motor will be initialized
and get its default position.
Press the needle up/down button
LED displays “6 ”
SELF-DIAGNOSTIC TEST
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 MODE key to proceed
the next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
Top bar
symbol
Top bar
symbol
Bottom
bar
symbol
Bottom
bar
symbol
LED displays needle lowest
position symbol when the needle bar
is at feed phase.
when LED displays bottom bar
symbol.
The feed motor will be initialized and
get its default position.
