Brother International PR1055X Operation Manual - Page 177

APPENDIX 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. Open the hook cover, remove the bobbin case, and a then remove the bobbin. (page 33) After cleaning is finished, insert the bobbin into the d bobbin case and the bobbin case into the hook, and then close the hook cover. (page 34) Slide the paper under the tension-adjusting spring to b remove any dust. Use a corner of the paper to remove any dust from around the hole. Cleaning the thread paths of the upper threads If dust or lint has accumulated in the thread guides or tension unit in the paths of the upper threads, the thread may break while embroidery is being performed. Periodically clean the thread paths. ■ Cleaning the thread guides Use the included cleaning brush to remove any lint and a dust from below the thread guide plates. 5 Clean the thread guide plates for both the upper thread guides and the middle thread guides. 1 Tension-adjusting spring 2 Hole 3 Paper Note • Do not bend the tension-adjusting spring. In addition, do not use anything other than thick paper or paper of the specified thickness to clean the bobbin case. Use the included cleaning brush to remove any lint and c dust from inside the bobbin case. 1 Upper thread guide 2 Middle thread guide 1 Thread guide plate 175