Brother International CS-8072 Users Manual - English - Page 73

TROUBLE SHOOTING, Trouble with threads and stitches

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CONTENTS BEFORE USE SEWING TROUBLE SHOOTING Trouble with threads and stitches Before calling for service, check the following items. If the problem still persists, contact your nearest authorized 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 Remedy 1. Upper threading is not correct. 1. Re-thread upper thread. 2. Upper thread is entangled. 2. Remove thread ends in the race or shuttle. 3. Spool of thread is not correctly set. 3. Set spool of thread correctly. 4. Correct needle is not used. 4. Change to proper needle. 5. Shuttle is damaged. 5. Contact service center. 1. Upper thread is entangled. 1. Remove thread ends in the race or inner shuttle. 2. Bobbin is not threaded properly in the shuttle. 2. Set bobbin properly and pull out the bobbin thread. 1. Needle is not correctly inserted. 1. Insert needle properly. 2. Correct needle is not used. 2. Change to proper needle. 3. The combination of fabric, thread and needle is not correct. 3. Check the "FABRIC/THREAD/NEEDLE COMBINATION CHART" on page 26. 4. Dust is clinging under the needle plate. 4. Remove dust by cleaning with a brush. 5. Upper threading is not correct. 5. Re-thread upper thread. 1. Threading is not correct. 1. Re-thread upper and bobbin thread correctly. 2. Correct needle is not used. 2. Change to proper needle. 3. Combination of fabric, thread and needle is not correct. 3. Check the "FABRIC/THREAD/NEEDLE COMBINATION CHART" on page 26. 4. Thread tension is not correct. 4. Refer to "THREAD TENSION" on page 20. 1. Needle position is not correct. 1. Set needle at proper position using "NEEDLE POSITION" button. 2. Hook of needle threader does not fit into the eye of the needle. 2. Set needle at proper position using "NEEDLE POSITION" button. 1. Upper threading is not correct. 1. Re-thread upper thread. 2. Set of bobbin thread is not correct. 2. Set bobbin properly and pull out the bobbin thread. 3. Combination of fabric, thread and needle is not correct. 3. Check the "FABRIC/THREAD/NEEDLE COMBINATION CHART" on page 26. 4. Presser foot holder is not correctly installed. 4. Install the foot holder correctly. UTILITY STITCHES MAINTENANCE SEWING CHART PATTERNS (PROGRAMMED IN MACHINE) 70

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70
Before calling for service, check the following items. If the problem still persists, contact your nearest author-
ized Brother dealer.
Trouble with threads and stitches
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.
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
TROUBLE SHOOTING
CONTENTS
BEFORE USE
SEWING
UTILITY STITCHES
MAINTENANCE
SEWING CHART
PATTERNS
(PROGRAMMED IN
MACHINE)