Rca jack question

[mike49504]

Im working on an aamp that came in for repair. When i recieved the amp the rca jacks were missing.

Im having a hard time finding a match to them so im gonna replace them with something similar.

Wondering how do i tell which pads are the rca ground on the circuit board?

I tryed touching a pad and touching the ground terminal on the amp but nothing.

So wondering how do i tell which pads are for the rca ground and which pads for the signal?

 

[Perry Babin]

The pads connected to the non-bridging speaker terminals are the shield grounds. This assumes that the amp isn't using balanced inputs.

 

[mike49504]

Unless i did it wrong i touched the speaker terminal and the pads for the rca jacks and nothing no reading.

Heres some pics of the board if that helps.

 

[Perry Babin]

Are two of those 4 pads directly connected? If so, those are the shield grounds.

 

[mike49504]

No no 2 pads are connected together Heres a pic on amp guts with the rca jacks installed. I cant make it out all that well but hope it helps.

 

[Perry Babin]

The red should be for signal. The yellow may be shield. The green may not go to anything. Does that pad connect to anything?

 

[mike49504]

Ok the green doesnt connect to anything . So im assumin they are using it for a brace.

Ill try the info you provided and see what i come up with Thanks Perry.

 

[mike49504]

Perry,

Thanks for all your help on this.

Amp works like a charm.