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Maintenance
If the above treatments do not solve the problem, contact the service center as described in your warranty.
5. Servicing double-insulated products (230 V-240 V)
In a double-insulated product, two systems of insulation are provided instead of grounding. No ground-
ing means are provided on a double-insulated product nor should a means for grounding be added to
the product. Servicing a double-insulated product requires extreme care and should only be done by
qualified service personnel with knowledge of the system under his or her responsibility. Replacement
parts for a double-insulated product must be identical to those parts in the product. The symbol is
marked on the double-insulated product.
Missed stitches
The needle is not correctly installed Install the needle correctly 23
The needle is bent Replace with a straight needle 23
The needle and thread are not appro-
priate for the fabric
Sew with a needle and thread
appropriate to the fabric
24
The upper thread is not correctly
threaded
Thread the upper thread correctly 16
The fabric
wrinkles
The tension of the upper thread is too
tight
Adjust the thread tension 30
The upper and lower thread are not
correctly threaded
Thread the upper and lower thread
again
15
16
The needle is too thick for the fabric
Use a needle appropriate to the
fabric
24
The needle is damaged Replace with a good needle 23
Too much lower
thread appears
on the right side
of the fabric
The lower thread is not correctly
threaded
Thread the lower thread correctly 15
The tension of the upper thread is too
tight
Adjust the thread tension 30
The bobbin is not correctly inserted in
the bobbin case
Correctly insert the bobbin in the
bobbin case
15
Too much upper
thread appears
on the wrong
side of the fabric
The upper thread is not correctly
threaded (not inserted in the tension
disc)
Thread the upper thread correctly 16
The tension of the upper thread is too
loose
Adjust the thread tension 30
The upper thread is not correctly
threaded (not threaded through the
thread guide)
Thread the upper thread correctly 16
Needle threader
does not work
The needle position is too low
Turn the handwheel towards
yourself to raise the needle to the
highest position
42
Needle No.9 is being used Use needle No.11 through 16 43
The needle is not correctly installed Install the needle correctly 23
The needle is bent Replace with a straight needle 23
The thread is not correctly set in the
needle guide
Pass the thread through the needle
guide correctly
17
Trouble Cause Countermeasure Page
52


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