Brother International HE-800A Instruction Manual - English - Page 117
Upper shaft does not rotate as far as the needle up stop position
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16. TROUBLESHOOTING Cause Feed home position sensor Feed timing belt Check Feed home position sensor position Feed timing belt tension Remedy Adjust the feed home position sensor position. Adjust the feed timing belt. Page - Needle does not zigzag or noise occurs when needle zigzags Cause Zigzag home position sensor Stopper Check Zigzag home sensor position Stopper position position Remedy Adjust the zigzag home position sensor position. Adjust the stopper position. Page - Sewing machine stops during sewing Cause Thread breakage detector Pauses Threading Error [E-07] Check Thread breakage detector position Panel DIP switch A - No. 3 Upper thread threading Upper thread scissors operation Remedy Adjust the thread breakage detector position. * If the detector is not adjusted, sewing may stop even when the thread is not broken. When panel DIP switch A - No. 3 is set to ON, sewing will pause when the treadle is depressed backward. * If the treadle is depressed very firmly and then released, the pedal may depress backward and cause sewing to be paused. Pass the thread correctly through the thread guide. Apply grease to the inclined face of the opening cam. Page - 81 58 76 Upper shaft does not rotate as far as the needle up stop position Cause Thread retainer and rotary hook are touching. Check Thread trimmer mechanism position Remedy Turn the machine pulley backward to set the needle bar to the needle up position. Push the thread driving arm in the direction of the arrow to set the thread trimming mechanism to the home position. Thread driving arm Page - 4026Q 109 HE-800A