Brother PR-620 operation manual Cleaning the bobbin case

3Use 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

1Remove all lint in this area

4After cleaning is finished, attach the needle plate in the opposite way that it was removed in step 2.

1

1Needle 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.

1Open the hook cover, remove the bobbin case, and then remove the bobbin. (Refer to page 18.)

2Slide 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.

7

1Tension-adjusting spring

2 Hole

3 Paper

Maintenance 195