12
Replacing electronic components
Thread tension unit
NOTE:
Do not disconnect connectors by pulling on cord.
To disconnect the connectors, grasp the connector,
not the cord.
To remove:
1. Remove the belt cover and the top cover (refer to
page 1 and 2).
2. Remove the front cover (refer to page 5).
3. Disconnect the thread tension motor connector from
the printed circuit board A (refer to page 8).
4. Remove the setscrews (A) and (B).
Remove the thread tension (unit).
To attach:
1. Follow the above procedure in reverse.
2. Check the upper thread tension (refer to page 21).
Setscrew A
Setscrew B
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