Brother PC-850D Operation Manual page 173

5
3
5
1
5
6
1
1
170
1
2
2
2
Always keep the machine clean.
1. Turn off the power and remove the presser
foot holder and the needle.
2. Loosen the screws. Using the metal disk
provided.
3. Remove the needle plate.
1 Needle plate
4. Turn the balance wheel towards you, and
align the notch of shuttle with the shelf of race
edge angle, and remove the shelf of race.
1 Notch of shuttle
2 Shelf of race
5. Take out the shuttle.
6. Remove accumulated lint and thread from the
inner shuttle and race with a brush or a
vacuum cleaner.
1 Race
2 Shuttle
7. Set the shuttle by aligning the shuttle
projection with spring of the stopper.
1 Projection
2 Spring
* Lint and dust accumulated in the race will
sometimes cause
malfunction of bobbin thread sensor.
poor stitching or