Brother International Innov-is BQ2450 Operation Manual - Page 198
the machine may feed the fabric even if the needle is raised. This is due to the needle bar release
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TROUBLESHOOTING Problem Cause Solution High-pitched sound Dust or lint is caught in the feed dogs. while sewing Pieces of thread are caught in the race. Remove the dust or lint. Clean the race. Upper threading is incorrect. Check the steps for threading the machine and rethread the machine. There are scratches on the bobbin case. Replace the bobbin case, or consult your authorized dealer. A bobbin designed specifically for this machine Incorrect bobbins will not work properly. Only is not used. use a bobbin designed specifically for this machine. Character pattern does not turn out Wrong presser foot was used. Pattern adjustment settings were set incorrectly. Attach the correct presser foot. Revise the pattern adjustment settings. Did not use a stabilizer material on thin fabrics Attach a stabilizer material. or stretch fabrics. Thread tension is set incorrectly. Adjust the thread tension. Fabric was pulled, pushed or fed at an angle Sew while guiding the fabric with your hands while it was being sewn. so that the fabric is fed in a straight line. Machine does not operate There is no pattern selected. "Start/Stop" button was not pushed. Select a pattern. Press the "Start/Stop" button. Main power switch is not turned on. Turn the main power to ON. Presser foot is not lowered. "Start/Stop" button was pushed with the foot controller attached. Lower the presser foot. Remove the foot controller, or use the foot controller to operate the machine. Nothing happens, even if the LCD display is pressed The "Start/Stop" button was pressed while the machine is set for the sewing speed controller to control the zigzag stitch width. Use the foot controller instead of the "Start/Stop" button to operate the machine, or set the "Width Control" to "OFF" in the settings screen. All keys and buttons have been locked by . Press buttons. to unlock all keys and The screen has been locked. Press either of the following keys to unlock the screen. The fabric feeds in the The feed mechanism is damaged. opposite direction. Contact your dealer or the nearest authorized service center. The LCD screen is fogged up. Condensation has formed on the LCD screen. After a while, the cloudiness will disappear. Page A-15 A-15 B-40 A-15 B-37 S-67 S-82 S-81 S-12 S-3 S-21, S-77 B-11 B-17 B-11 S-4 B-23, S-4 B-47, B-49 - - - CAUTION • This machine is equipped with a thread detection device. If the "Start/Stop" button is pushed before the upper threading is done, the machine will not operate properly. Also, depending on the pattern selected, the machine may feed the fabric even if the needle is raised. This is due to the needle bar release mechanism. At these times, the machine will make a sound different from what is made during normal sewing. This is not the sign of a malfunction. • If the power is disconnected during sewing: Turn the main power to OFF and unplug the machine. If you restart the machine, follow the instructions for operating the machine correctly. A-28