Trouble Shooting; Trouble With Threads And Stitches - Brother CS-8072 Operation Manual

TROUBLE SHOOTING

Trouble with threads and stitches

Before calling for service, check the following items. If the problem still persists, contact your nearest author-
ized Brother dealer.
Symptom
1. Upper thread breaks
2. Bobbin thread breaks
3. Skipped stitches
4. Fabric puckers
5. Inability to thread needle
6. Thread tension is incorrect
Probable cause
1. Upper threading is not correct.
2. Upper thread is entangled.
3. Spool of thread is not correctly set.
4. Correct needle is not used.
5. Shuttle is damaged.
1. Upper thread is entangled.
2. Bobbin is not threaded properly in the
shuttle.
1. Needle is not correctly inserted.
2. Correct needle is not used.
3. The combination of fabric, thread and
needle is not correct.
4. Dust is clinging under the needle plate.
5. Upper threading is not correct.
1. Threading is not correct.
2. Correct needle is not used.
3. Combination of fabric, thread and
needle is not correct.
4. Thread tension is not correct.
1. Needle position is not correct.
2. Hook of needle threader does not fit
into the eye of the needle.
1. Upper threading is not correct.
2. Set of bobbin thread is not correct.
3. Combination of fabric, thread and
needle is not correct.
4. Presser foot holder is not correctly
installed.
Remedy
1. Re-thread upper thread.
2. Remove thread ends in the race or
shuttle.
3. Set spool of thread correctly.
4. Change to proper needle.
5. Contact service center.
1. Remove thread ends in the race or
inner shuttle.
2. Set bobbin properly and pull out the
bobbin thread.
1. Insert needle properly.
2. Change to proper needle.
3. Check the "FABRIC/THREAD/NEEDLE
COMBINATION CHART" on page 26.
4. Remove dust by cleaning with a brush.
5. Re-thread upper thread.
1. Re-thread upper and bobbin thread
correctly.
2. Change to proper needle.
3. Check the "FABRIC/THREAD/NEEDLE
COMBINATION CHART" on page 26.
4. Refer to "THREAD TENSION" on page
20.
1. Set needle at proper position using
"NEEDLE POSITION" button.
2. Set needle at proper position using
"NEEDLE POSITION" button.
1. Re-thread upper thread.
2. Set bobbin properly and pull out the
bobbin thread.
3. Check the "FABRIC/THREAD/NEEDLE
COMBINATION CHART" on page 26.
4. Install the foot holder correctly.
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