Servicing Double-Insulated Products (230 V-240 V) - Toyota ESM21 Instruction Manual

Trouble
The needle is not correctly installed
The needle is bent
The needle and thread are not appro-
Missed stitches
priate for the fabric
The upper thread is not correctly
threaded
The tension of the upper thread is too
tight
The upper and lower thread are not
The fabric
correctly threaded
wrinkles
The needle is too thick for the fabric
The needle is damaged
The lower thread is not correctly
threaded
Too much lower
thread appears The tension of the upper thread is too
on the right side tight
of the fabric
The bobbin is not correctly inserted in
the bobbin case
The upper thread is not correctly
threaded (not inserted in the tension
disc)
Too much upper
thread appears The tension of the upper thread is too
on the wrong loose
side of the fabric
The upper thread is not correctly
threaded (not threaded through the
thread guide)
The needle position is too low
Needle No.9 is being used
Needle threader
does not work The needle is not correctly installed
The needle is bent
The thread is not correctly set in the
needle guide
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.
Cause
51
Countermeasure
Install the needle correctly
Replace with a straight needle
Sew with a needle and thread
appropriate to the fabric
Thread the upper thread correctly
Adjust the thread tension
Thread the upper and lower thread
again
Use a needle appropriate to the
fabric
Replace with a good needle
Thread the lower thread correctly
Adjust the thread tension
Correctly insert the bobbin in the
bobbin case
Thread the upper thread correctly
Adjust the thread tension
Thread the upper thread correctly
Turn the handwheel towards
yourself to raise the needle to the
highest position
Use needle No.11 through 16
Install the needle correctly
Replace with a straight needle
Pass the thread through the needle
guide correctly
Maintenance
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