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Old 7th February 2012, 02:25 PM   #11
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can someone post the link about removing these spring clips properly?
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Old 7th February 2012, 09:25 PM   #12
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Jl audio 500/1 Transistor clamps
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Old 7th February 2012, 11:47 PM   #13
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well i replaced four caps soldered some connections that looked shady from the top but were actually decent on the bottom. powered up the amp and got a loud pop. now the amp is back to square one but the rail voltage is 1 volt higher. Any takers?
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Old 8th February 2012, 12:05 AM   #14
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What popped?
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Old 8th February 2012, 12:50 AM   #15
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i see no visible signs of damage except the blemish marks around the mospec u30d20a which have been there since i opened it up.
It does show shorted on board between legs 1 and 3. This part has voltages in post #1.
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Old 8th February 2012, 01:13 AM   #16
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Do you have 15v on the power supply pins of the op-amps in the preamp section?

Do you have +105v on the center leg of the rectifier next to the one with -105v?

Do you have a scope?
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Old 8th February 2012, 01:36 AM   #17
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i found a bridged solder gap between the b+ input and the remote turn on. fixed that. now the amp turns on with remote correctly.
Yes I have 105+ and 105-
I do not have a scope and not sure but this has a 16 pin s62525ap
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Old 8th February 2012, 01:58 AM   #18
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the amp casing shows direct continuity to the b+ terminal, but not main ground
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Old 8th February 2012, 02:06 AM   #19
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question. when replacing the four caps that were broken surrounding the s62525ap in top right of pic #2, i neglected to note the polarity of the caps. so i did a continuity test and all locations had a black half moon on the board and showed ground. So i installed the caps negative to this position. I would assume that that is correct? Thanks
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Old 8th February 2012, 02:16 AM   #20
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Clarification...

SG2525AP or SG3525AP most likely.

The second photo has the caps in the bottom left. The first photo has 2 of them in the top right. Refer to them as top or bottom. Are those the caps that you're referring to?

Generally, the capacitor's negative goes to the marking on the board. The positive terminals typically have a square solder pad.
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