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Troubleshooting
Condition
The fabric is not
Cause
. The feed dog is packed with lint.
Reference
See page 76.
. The machine is not correctly threaded.
. The needle is incorrectly inserted.
See pages 28 - 46 and 56.
See page 16.
The seam is not
sewn neatly.
Seam
puckering.
The machine
does
not operate.
The fabric is not
cut neatly.
80
4
WP
OO D
Al
P
. The needle and/or looper thread tensions are
not correctly adjusted.
. The machine is not correctly threaded.
. The needle and/or the thread are not suitable
for the fabric being sewn.
. The thread is not between the tension discs.
. The needle or looper thread tension is too tight.
. The machine is not correctly threaded.
. The differential feed dal is not correctly
adjusted.
. The machine has not been plugged in firmly.
. The power switch is turned off.
. The position of the upper knife is not adjusted
properly.
. The upper knife is dull.
See pages 52 - 54 and 58, 66.
See pages 28 - 46 and 56.
See pages 60 - 62, 70 and 72.
See pages 32, 38, 42 and 46.
See pages 52 - 54 and 58, 66.
See pages 28 - 46 and 56.
See page 20.
See page 10.
See page 10.
See page 74.
Replace the upper knife.
(See page 74.)
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