Hi,

I have a variable temp iron and put a wire link across the top of it for now, it seems to have cured the problem.

What is the purpose of this resistor? Is bridging it ok?
I would theorise that because of the high impedance of the amplifier inputs that very little current is drawn from the outputs and that there is very little voltage drop across this resistor, therefore it's purpose may simply be to protect the output stage from over current draw, which in this case it did succesfully.

Since the supply voltage is 12v, the max current that you could put back through that resistor if you accidentally connected the RCA screen to live would be 12/1200=10ma. Therefore the max current you could dissipate in that resistor would be 10ma*12v=120mw. What are those resistors rated at? Could 120mw through that reistor blow it?

I thought it might be possible to measure the value of the good one in situ as I believe one end is not attached to anything as it goes to the header that connects to the docking connector.

Any thoughts?

edit sp.