I'm getting voltage readings on the soldering joints of the 'P1' plug in, pin '1' is supposed to get 5v, pin 2-4 are getting 5v readings as well but they aren't supposed to be getting voltage while power is on but play/ff/rew aren't activated, following schematics the voltage is coming from a series of IC chips, and my limited, semi beginners knowledge of reading schematics, my trail goes cold at the series of IC chips, if checked every diode and resistor in the area (that entire side of the board) and their fine, could be one of the PNP or NPN transistors that send commands to the IC chips but I really dont want to pull them and test, without a curve tracer for matching transistors I would rather a pro mess with that, and from what I'm hearing the IC chips on the TSR-8 have custom specs and can't be swapped with IC chips bought randomly online, thought I'd just try and find a PCB in whole first, thinking of sending my control pcb to a shop in LA that might be able to find problem and might have an inventory of tascam IC chips, if anyone that's good at this stuff and feels like checking out the schematics and has as any suggestions, I'd really appreciate it