I have a janome sr2100 i bought in 1985. As the controller (foot pedal)was over thirty years old (mfg 1984), my husband checked out the internal parts and found that the paper capacitor (condenser) 0.05 uf/250V was very leaky (short circuit) and replaced it with a more modern standard part (0.047 uf/630V polyester). This fixed the problem. i don't quilt but I dressmake but i thought my message would be useful to other users