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Maintenance 195
7
3
Use the included cleaning brush to remove
any lint and dust from the moving knife, the
fixed knife, the thread retaining plate, and
their surrounding areas.
1 Remove all lint in this area
4
After cleaning is finished, attach the needle
plate in the opposite way that it was removed
in step
2.
1 Needle plate
Cleaning the bobbin case
Thread wax and dust easily collect around the hole
in the tension-adjusting spring on the bobbin case,
resulting in an incorrect thread tension. Therefore, it
should be cleaned each time when the bobbin is
changed.
Use a piece of paper with the thickness of a business
card.
1
Open the hook cover, remove the bobbin
case, and then remove the bobbin. (Refer to
page 18.)
2
Slide the paper under the tension-adjusting
spring to remove any dust.
Use a corner of the paper to remove any dust
from around the hole.
1 Tension-adjusting spring
2 Hole
3 Paper
1
1
Sapphire_chapt7.fm Page 195 Friday, November 18, 2005 12:10 PM