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Adjustment (Main Unit)
Inspection and
Adjustment
Upper thread tension adjustment
1. Attach the operation PCB assy. flat cable and power PCB assy. lead wire connector to the main PCB assy., and
attach the front cover to the arm bed. (without screwing it on).
2. Press and while turning the power on (the buzzer will sound four times, and test mode will start).
3. <S2>
Select using , press twice, and set the needle bar to the middle base line position.
<S3>
Select using or , and after pressing , press twice, and set the needle bar to the
middle base line position.
4. Raise the presser foot lifter.
5. Turn the thread tension dial to the "standard" position.
6. Pass a Schappe Spun Sewing Thread #60 through the tension disc.
7. Lower the presser foot lifter.
8. Pull the thread with a tension gauge, and adjust the thread tension adjusting screw so that it is 0.436 - 0.466N
(44.5 - 47.5 g).
9. Apply a small amount of screw locking compound to the thread tension adjusting screw.
Screw locking compound for thread tension
adjusting screw
Small amount
XA9154001 Tension gauge 50 (0.5 N)
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