Blow up once, Blow up twice and Blow up somemore

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I blowed Caps, blowned diodes, and broke the copper on PCB. Finally, I blow up the LM3875.....

I finally got my 25V+25V PS fix.... it actrually come out to be 38.3-.7 +/-

Before I put the PS back together, I was using a stable 12V supply to run the amp section, No Problem.

Later I fixed the 25V+25V PS and connected to the Amp section, and the chip blow as soon as I turn on the power.

After the Chip blow, the PS still fine and getting the same reading.

Then I wonder can I connect PG+/- together from the amp section then out to a cable to the rectifer board? Because it is connect together in amp section anyway.

*********PG+ ---*****************-----PG-*************
Amp section******\ One Power cable /********Rectifer board
***************/-----------------\*******************
*********PG- ---*****************-----PG+*************

* = empty spaces

The problem is my amp section.... 3:45am... I need to sleep now. Continue tomorrow. Pictures tomorrow too.:xeye:
 
Left Channel Blown Chip
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Left Channel Full View
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Right Channel Blown Chip
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Right Channel Full View
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THE PROBLEM
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The wire on the paper suppose to be V- but I put V+ there.....

I have a question. How come I use the a electric meter to test the connectitive. The meter beep when I connect everthing together while I put the niddle to V+ and V-? If I test The Power Supply allone, the meter won't beep. Is it the blown chip bridge or it is suppose to be like that? Also should I replace ever compounet or I just change the chip?
 
Old curmudgeon carpenter sez.......

"Measure thrice, cut once!"

Having let the smoke out more than once over the years myself, I finally started triple-checking before I turned on the juice. Nothing like having a PS capacitor pop right in your face though. Smells like victory!

:D

speaker
 
Is time for some pron of my amp !

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SoloC's Brain board Amp intergrated into this room.

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The table when I was working on the amp

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And After

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This is one hell of a battle for me.... the original case become only a power supply box which I spent about 100 on it while I was building in last summer....... After many faliure...... I give up the box and now I got the amp sections to two seperate box. Life is so much easier now. Thx everyone ! Sound is prefect here.

P.S: Some more pictures here !
 
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