Troubleshooting - Janome 4300QDC Instruction Book

Troubleshooting

Condition Cause
The needle thread 1. The needle thread is not threaded properly.
breaks 2. The needle thread tension is too tight.
3. The needle is bent or blunt.
4. The needle is incorrectly inserted.
5. The needle and bobbin threads are not set under the presser foot
when start sewing.
. The thread is either too heavy or too fine for the needle.
The bobbin thread 1. The bobbin thread is not threaded properly in the bobbin holder.
breaks 2. Lint has collected in the bobbin holder.
3. The bobbin is damaged and does not turn smoothly.
4. The thread is wound loosely on the bobbin.
The needle breaks 1. The needle is incorrectly inserted.
2. The needle clamp screw is loose.
3. The threads were not drawn to the rear after sewing.
4. The needle is too fine for the fabric being used.
5. An inappropriate presser foot is used.
Skipped stitches 1. The needle is incorrectly inserted, bent or blunt.
2. The needle and/or threads are not suitable for the work being sewn.
3.
and synthetics.
4. The needle thread is not threaded properly.
5. A poor quality needle is used.
Seam puckering 1. The needle thread tension is too tight.
2. The needle thread is not threaded properly.
3. The needle is too heavy for the fabric being sewn.
4. The stitch length is too long for the fabric.
5.
The fabric is not 1. The feed dog is packed with lint.
feeding smoothly . The stitches are too fine.
3. The feed dog is not raised after "drop feed" sewing.
Loops on the seams 1. The needle thread tension is too loose.
. The needle is too thick or too fine for the fabric.
The machine does 1. The machine is not plugged in.
not work 2. Thread has been caught in the hook race.
3. The bobbin winder spindle is not returned to the left after bobbin
winding.
Buttonhole sewing 1. The stitch density is not suitable for the fabric being sewn.
is not sewn properly 2. The interfacing has not been used for the stretch or synthetic fabric.
3. The buttonhole lever is not lowered.
The machine is 1. Thread has been caught in the hook race.
noisy 2. Lint has built up in the hook race or bobbin holder.
Auto thread cutting 1. Thread is too thick for the auto thread cutting.
failed 2. Threads have been caught in the thread cutter mechanism.
blue tip needle is not being used for sewing stretch, very fine fabrics
stabili er is not used when sewing very fine fabrics.
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Reference
Page 21
Page 13-14
Page 16
Page 16
Page 23
Page 17
Page 20
Page 73
Change the bobbin.
Page 19
Page 16
Page 16
Page 27
Page 17
Use the correct foot.
Page 16
Page 17
Use the stretch stitch
needle.
Page 21
Change the needle.
Page 13-14
Page 21
Page 17
Make stitch shorter.
Apply a stabilizer.
Page 73
Make stitch longer.
Page 15
Page 13-14
Page 17
Page 6-7
Page 73
Page 19
Page 39
Apply an interfacing.
Page 38
Page 73
Page 73
Page 27
Page 73