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Correct condition
1. Bobbin winder switch (Spool)
Move the bobbin winder stopper
to the left and right.
Left: “H”
Right: “L”
2. Presser foot lifter switch (Foot)
Raise and lower the presser foot
lifter.
Up position: “H”
Down position: “L”
3. Auxiliary detecting switch (Assist)
Raise the presser foot lifter to the
up position and to the extra lifted
position, and lower the presser
foot.
Extra lifted position: “H”
Down position: “L”
4. Straight stitch needle plate
sensor switch (Straight)
Attach the straight stitch needle
plate.
Needle plate attached: “H”
Needle plate removed: “L”
5. Standard needle plate sensor
switch (Zigzag)
Attach the standard needle plate.
Needle plate attached: “H”
Needle plate removed: “L”
6. Buttonhole sensor (BH Sen)
Pull the buttonhole lever toward
you: “H”
Release the buttonhole lever: “L”
Pull the buttonhole lever to the
back: “H”
7. Drop feed micro switch
(FeedDog)
Move the feed dog drop lever to
the left and right.
Left (feed dog lowered): “H”
Right (feed dog raised): “L”
8. Thread cutter foot switch sensor
(TrimFoot)
Connect the thread cutter switch
and press it: “H”
Release the switch: “L”
Press the start/stop key to proceed
to the next step.
Faulty condition
Buzzer does not sound.
The display does not change or is
reversed.
To adjust or replace a part:
Adjust the position of the
detecting switch.
Replace the detecting switch.
Change the board A.
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Detecting switch
