TASCAM TEAC M3500 sub buss pcb 52103016-00 but for some people they

but for some people they just want to change the whole board

maybe  useful spare there is also what appears to be a 4 way 4pdt throw switch slide switch as has 12 connections but only moves once

this unit if from the reel braking circuit

These are used widely in all the older Teac models later ones don't have the thread although they should all be compatible in most cases

it covers the pinch wheel and is often missing as falls off all the time when the machine gets a knock

TASCAM TEAC M3500 sub buss pcb 52103016-00 but for some people theyPCB From the M3500, be careful to check the board name and number on the rear as some here have same board name but different rear pcb numbers Simple board listed in case you have some duff connectors