Brother International PR670E Operation Manual - Page 215
Cleaning the thread paths of the, upper threads
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APPENDIX 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 sewn. Periodically clean the thread paths. ■ Cleaning the thread guides Use the included cleaning brush to remove a any lint and dust from below the thread guide plates. Clean the thread guide plates for both the upper thread guides and the middle thread guides. 1 Upper thread guide 2 Middle thread guide Using the included cleaning brush, remove b any lint and dust from the two pieces of felt washers (top, bottom) inside the tension dial. 1 Tension dial 2 Nylon shoulder washer 3 Nylon washer only for tension number 4 4 Tension spring 5 Tension base spring 6 Felt washer (top) 7 Tension disc 8 Felt washer (bottom) 7 1 Thread guide plate ■ Disassembling and cleaning the tension unit To remove tension dial, turn dial a counterclockwise as shown on illustration. 1 Tension dial 213
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