Changing light bulb – SINGER W1523 User Manual
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Upper or lower thread tension too tight
Stitch too long for material
Thread too thick
incorrect threading of upper or lower thread
Needle not correctly inserted
Needle clamp screw too loose
Upper thread tension too tight
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the needle was down in the materiai
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Do not try to correct fault by yourself.
Changing Light Bulb
Unplug the machine.
Open face cover as shown.
Remove bulb by unscrewing it
Install a new bulb by screwing it