palomar vc-300

[ixphant0mxi]

i have a palomar vc-300 same thing as the rf limited vc-300 voice controller, it has very low echo volume and only wants to repeat like 2 times max with both the time and echo volume knobs maxed out seems they kind of work as turning them all the way left and right they seem to do something . everything else works fine the mic gain, monitor,/ talk back control and mix the rec ,code and pee ( beepS/doorbell ) work fine just super low echo volume and time, have tried to find some type of schemat for it online and even a manual, NOPE NADA Zip... due to how rare they are, i can find a manual and schematic for the vc-100 but isn't the same thing i have used deoxit on the controls thinking maybe dirty nope, pressed on wires connected via a plug to make sure no bad connections NOPE, pressed on board gently to see if possible bad solder joints due to age NOPE, i do not see any blown or bulged electrolytic capacitors anyone have one of these still around and happen to have a manual or schematic ? or anyone have a idea of where to look to see what might be the reason it has to be some voltage not getting somewhere to the echo module