This is the standard PCB for controlling the capstan motor of many of the TEAC TASCAM reel to reel recorders going back many years, I have seen
This is the later model though I have seen the same board driving earlier motors, I have a feeling they are all compatible as all have the same output connector connector but soem are for reversing units
You see sometimes people selling motors without this board as normally they are sold together or get seperated when people parting out a machine.
For sure works with EM1446
This one was from an X7R it has the smaller chip on