The popular US manuf. of DC motor drives, KB, traditionally use transformer-less units, The low voltage in some boards are derived from a zener circuit. Some models do however have an control isolation transformer., you hit some good points. No "transformer" on the board as well as more than one opto indicates multiple grounds and not only that, .
|Thread starter||Similar threads||Forum||Replies||Date|
|J||mc2100-els-18W pops fuse||Technical Repair||2|
|T18 MC2100 ELS or Motor||Technical Repair||8|
|mc2100-els-18W board motor treadmill not working motor||Technical Repair||1|
|P||mc2100-els-18W wiring board to treadmill||Technical Repair||6|
|P||MC2100 (x)? pls identify model/rev.||General Electronics Chat||6|