Brother BC800, Service Manual

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Adjustment Needle bar height adjustment
1. Attach the front cover.
2. Remove needle plate B.
3. Hold down the backstitching button and the selecting button (right), and turn the power on (the buzzer must sound
four times).
4. Select pattern number [02].
5. Press the [REV] key four times to select the left base line.
6. Attach the J foot and lower the presser hoot lifter.
7. Turn the pulley by hand until the right edge of the needle and the tip of the outer rotary hook meet.
8. Loosen the set screw (socket (CP) M4 x 4) in the needle bar block.
9. Adjust the height of the needle bar for 1.0 - 1.4 mm between the top of the needle hole and lower edge of the outer
rotary hook tip.
NOTE
• Needle hole turned forward.
10. Tighten the socket set screw (FT, M4X4) to secure the needle bar block.
11. Perform "Adjust the needle thread block ".
Socket set screw
(FT, M4x4)
Needle bar block
Needle bar
1.0-1.4mm
The right edge of the needle is aligned
with the tip of the outer rotary hook.