Troubleshooting - Janome Memory Craft 9450QCP 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 thread is not set under the presser foot when start sewing.
6. The fabric is moved too fast when stitching free motion quilting.
7. The thread is tangled around the spool.
The bobbin thread 1. The bobbin thread is not threaded properly in the bobbin holder.
2. Lint has collected in the bobbin holder.
breaks
3. The bobbin is damaged and does not turn smoothly.
The needle breaks 1. The needle is incorrectly inserted.
2. The needle is bent.
3. The needle clamp screw is loose.
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. A blue tip needle is not being used for sewing stretch, very fine fabrics
and synthetics.
4. The needle thread is not threaded properly.
5. A poor quality needle is used.
6. A purple tip needle is not being used for sewing thick fabrics, denims
and across the hem.
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 foot pressure is not adjusted properly.
6. A stabilizer is not used when sewing very fine fabrics.
The fabric is not 1. The feed dog is packed with lint.
2. The stitches are too fine.
feeding smoothly
3. The feed dog is not raised after "drop feed" sewing.
Loops on the seams 1. The needle thread tension is too loose.
2. The needle is too thick or too fine for the fabric.
The machine does 1. The machine is not plugged in.
not run 2. Thread has been caught in the hook race.
3. The start/stop button is used for ordinary sewing with the foot control
plugged in.
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.
2. Lint has built up in the hook race or bobbin holder.
noisy
Auto thread cutting 1. Thread is too thick for the auto thread cutting.
failed 2. Threads have been caught in the thread cutter mechanism.
Pattern selection 1. The needle plate for straight stitch or the professional grade needle
keys are grayed out. plate is attached to the machine.
2. Dual feed key is on.
3. Twin needle key is on.
Pattern selection 1. The key position is out of alignment.
keys do not work
The needle thread 1. Thread tension is not balanced.
appears on the
wrong side of the
fabric when the
stitch width value
is larger than "7.0".
It is not abnormal for a faint humming sound to be heard from the internal motors.
The LCD screen and function key area may become warm after several hours of continuous use.
115
Reference
Page 20
Page 43
Change the needle.
Page 23
Page 34
Page 102
Use the spool holder.
Page 19
Page 112
Change the bobbin.
Page 23
Change the needle.
Page 23
Page 24
Use the correct foot.
Page 23
Page 24
Use the stretch stitch
needle.
Page 20
Change the needle.
Page 24
Page 43
Page 20
Page 24
Make stitch shorter.
Page 43
Apply a stabilizer.
Page 112
Make stitch longer.
Page 29
Page 43
Page 24
Page 11-12
Page 112
Page 12
Page 51
Apply an interfacing.
Page 49
Page 112
Page 112
Page 15
Page 112
Page 28
Page 37
Page 70
Page 106
Page 43