Brother CS-80 "brothers cs80" Questions

good afternoon, My Brother sewing mach. has a error of f7 what does this mean. The model is Cs80 According to http://www.sewingmachinesplus.com/brother-sewing-machine-error-code-f7.php the meaning and

the bobbin will tread at all! no fabric is caught-up. motor run but not threading. If you need a manual to see if everything is set up as it should be for winding a bobbin or any other feature of the ...

Brother CS80 ..... bobbin winder not working. power not being transfered to the shaft that turns the bobbin. how can i fix it? check the power cord to see if it plugged in to the machine correctly ...

F4 Error My machine is displaying "F4" when I plug in the presser foot. It sews without it...But I really prefer sewing with the pedal. in the middle of sewing the machine made a loud noise and then ...

Auto threader cassette don't work any longer, How can i manually thread the machine to use it without the cassette? The Brother CS80 autothread cassette no longer works after maybe 20 hrs of sewing ...