Tascam 133 phone ampl pcb-105 5210061500 52100615-00 One of several jack PCBs

One of several jack PCBs used in this mixer this is tha A type

These do not normally come up second hand as sold with the mixer but of course if yours in dead then you need a new one or repair the old

then they fly along

This is the piece of metal that holds the capstan in and that you should allow a little play when setting it up as the capstan should move about 1mm not be pressed hard against this to allow free movement and settle down when running

Tascam 133 phone ampl pcb-105 5210061500 52100615-00 One of several jack PCBsPCB from a Tascam 133, tricky to change this as in these days they did not use molex connectors so everything needs soldering