Adjusting The Tension Release Wire - Brother S-7200A Service Manual

5-12. Adjusting the tension release wire

2298M
0.5–1mm
2299M
Open
2–3mm
Opening starts
0.5–1mm
2300M
S-7200A
If the upper thread trailing length is too short after thread
trimming, or if the thread tension disc presser (1) remain
open, make the following adjustment.
* Lower the presser foot when making these adjustment.
A. If the upper thread trailing length after thread
trimming is too short
(The tension release wire does not operate enough
during thread trimming)
・ When the solenoid plunger (2) is pushed by 2–3 mm, the
tension disc presser (1) starts opening, and when it is
pushed all the way, the tension disc presser (1) should
always be open.
(The tension disc (3) will open by 0.5–1 mm at this time.)
・ When the solenoid plunger (2) is released, the tension
disc presser (1) [tension disc (3)] closes.
1. Loosen the nuts (4) and (5), and then push the solenoid
plunger (2) by 2–3 mm.
2. Tighten the left-side nut (4) until the tension disc presser
(1) starts to open.
3. Check that the tension disc presser (1) opens fully when
the solenoid plunger (2) is pushed all the way, and that
the tension disc presser (1) closes when the solenoid
plunger (2) is released.
4. Tighten the right-side nut (5).
B. If the tension disc presser stay open
1. Check that the solenoid lever (6) has returned fully.
2. Check that the tension release wire (7) is not stretched.
3. Adjust using nuts (4) and (5) as described above.
* If adjustment is not possible, adjust the tension of the
tension release wire (7).
5. ADJUSTMENTS
30