35
Trouble shooting guide
Before calling for service, check the following items. If the problem still persists, contact the place of
purchase or your nearest authorized dealer.
Problem
Cause
Correction
Reference
Upper thread
breaks
1. The machine is not threaded correctly.
1. Rethread the machine.
Page 9
2. The thread tension is too tight.
2. Reduce the thread tension (lower number).
Page 11
3. The thread is too thick for the needle.
3. Select a larger needle.
Page 6
4. The needle is not inserted correctly.
4. Remove and reinsert the needle (flat side
towards the back).
Page 6
5. The thread is wound around the spool holder
pin.
5. Remove the reel and wind thread onto reel.
Page 9
6. The needle is damaged.
6. Replace the needle.
Page 6
Lower thread
breaks
1. The bobbin case is not inserted correctly.
1. Remove and reinsert the bobbin case and
pull on the thread. The thread should pull
easily.
Page 8
2. The bobbin case is threaded wrong.
2. Check both bobbin and bobbin case.
Page 8
Skipped
stitches
1. The needle is not inserted correctly.
1. Remove and reinsert needle (flat side
towards the back).
Page 6
2. The needle is damaged.
2. Insert a new needle.
Page 6
3. The wrong size needle has been used.
3. Choose a needle to suit the thread.
Page 6
4. The foot is not attached correctly.
4. Check and attach correctly.
Page 4
5. The machine is not threaded correctly.
5. Rethread the machine.
Page 9
Needle
breaks
1. The needle is damaged.
1. Insert a new needle.
Page 6
2. The needle is not correctly inserted.
2. Insert the needle correctly (flat side towards
the back).
Page 6
3. Wrong needle size for the fabric.
3. Choose a needle to suit the thread and
fabric.
Page 6
4. The wrong foot is attached.
4. Select the correct foot.
Page 16
5. The needle clamp screw is loose.
5. Use the screwdriver to firmly tighten the
screw.
Page 6
6. The presser foot that is used is not
appropriate for the type of stitch that you
wish to sew.
6. Attach the presser foot that is appropriate
for the type of stitch that you wish to sew.
Page 16
7. The upper thread tension is too tight.
7. Loosen the upper thread tension.
Page 11
Loose
stitches
1. The machine is not correctly threaded.
1. Check the threading.
Page 9
2. The bobbin case is not correctly threaded.
2. Thread the bobbin case as illustrated.
Page 8
3. Needle/ fabric/ thread combination is
wrong.
3. The needle size must suit the fabric and
thread.
Page 6
4. Thread tension is wrong.
4. Correct the thread tension.
Page 11
Seam
gather or
pucker
1. The needle is too thick for the fabric.
1. Select a finer needle.
Page 6
2. The stitch length is adjusted wrong.
2. Readjust the stitch length.
Page 15
3. The thread tension is too tight.
3. Loosen the thread tension.
Page 11
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