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TROUBLESHOOTING GUIDE
Be sure check the following before calling an authorized service station.
Problem
1. Sewing machine pulley doesn´t turn.
2. Needle thread and bobbin thread break.
3. Seams don´t match.
4. Skipped stitches
5. Poor thread tightening
6. Broken needles
Caution
If problems 2 to 6 above are not due to the cause on the right, check the needle and feed timing, or the needle and rotary
hook timing.
If the problem persists, turn the power off and consult your dealer.
MP00600EN_160801
Where to check ( page)
• Is a breaker or fuse blown?
• Is the power cord disconnected?
• Is the needle tip bent?
• Is the needle tip blunt?
• Is the needle properly installed? (p. 14)
• Is the machineproperly threaded? (p. 17 and 18)
• Is the rotary hook properlylubricated (p. 12)
• Is dust or thread in the rotary hook ?
•Is the presser foot pressure too weak ? (p. 19)
•Is the feed dog too low (p. 33)
• Is the bobbin scratche?
• Is the V-belt tension too low? (p. 9)
• Is the needle tip bent?
• Is the needle properly installed?
• Is the presser foot pressure too weak? (p. 19)
• Is the machine properly threaded? (p. 17 and 18)
• Is the needle tip blunt?
• Is the sewing speed too fast?
• Is the thread take-up spring operating range too small?
(p. 22)
• Is the needle thread tension and/or bobbin thread
tension too low? (p. 20)
• Is the bobin scratched?
• Is the machine properly threaded? (p. 17 and 18)
• Is the needle tip bent?
• Is the needle tip blunt?
• Does the needle pass the center of the needle hole
in the feed dog?
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