Debugging a Coloursound Wah

[WelshWonder]

Hi guys,

I've got a faulty Coloursound Wah, original from 1977. I've been testing the voltages around the circuit and found that on one pin of a square 10k resistor I get a reading of 4.9V but on the other pin I get no output. Does that mean I have found the dodgy part? Sorry if it sounds dumb, but I'm new to all this...

[Ge_Whiz]

Not if the other end is earthed, no.

[WelshWonder]

Well, the other end is earthed so I guess I should keep trying, what are the common parts to go on Wah Wah's of this age? I don't get a singal on the output jack...

Thanks