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Old 21st August 2010, 06:02 PM   #1
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Default Rca jack question

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?
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Old 21st August 2010, 06:10 PM   #2
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The pads connected to the non-bridging speaker terminals are the shield grounds. This assumes that the amp isn't using balanced inputs.
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Old 21st August 2010, 06:32 PM   #3
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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.
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File Type: jpg Picture 407.JPG (218.3 KB, 37 views)
File Type: jpg Picture 405.JPG (319.0 KB, 35 views)
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Old 21st August 2010, 06:35 PM   #4
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Are two of those 4 pads directly connected? If so, those are the shield grounds.
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Old 21st August 2010, 06:40 PM   #5
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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.
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Old 21st August 2010, 06:55 PM   #6
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The red should be for signal. The yellow may be shield. The green may not go to anything. Does that pad connect to anything?
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Old 21st August 2010, 07:00 PM   #7
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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.
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Old 21st August 2010, 08:28 PM   #8
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Perry,

Thanks for all your help on this.

Amp works like a charm.
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