unfortunately, after re-installing my car audio I found my sundown amp going into protect.

It goes into protect immediately; the power light turns on about 1-2 secs later; 5 seconds later the two relays marked with a purple X close/open(click)...; unhooked from speaker;

I found manufacture damages that were covered in glue, marked in black; red. In pink there is some rubbing damage to the winding; no metal caps blown; the plastic ones which the top may have some give; each one can depress at-least a mm or so. That's all I can tell visually. I cannot smell burnt electronics; nor are any burns prevalent on top of the board.

I've built small circuits and studied them a lot; and have a megger which probably wont be needed; along with a 400mfd/~2Mohm range; and MV Meter... I also have an oscilloscope. So please help get me to a starting ground on repairing this amp; I have good soldering skills. And can re-paste the transistors tot he heat sink with high quality thermal compound.

Pictures are large for detail...

yellow rub; black manufacture damage

yellow rub; black manufacture damage

all manufacture damage; have glue over it; yellow insulation missing on wire; black minor heat shrink overheated.

X's represent relays turn on/of after 5 seconds.

In yellow rub; pink manufacture damage

Edited November 27, 201113 yr by Rawr-dq

I did some testing; I have a 12v powersupply thanks to a optima d31a; 1125 cranking amps; 900 cold; 75 amp hour battery just sitting around...

I did millivolt testing From the positive terminal; I can measure hundredths of a millivolt; I got ~29mv on exposed windings closest to the power in.

~5mv on each heat sink. marked in green I have 102 volts.

Any ideas where to start; can someone help me trace the protection circuit?

Edited November 27, 201113 yr by Rawr-dq

I would send it into dB-R

I ohmed all the mosfets; on the power I got 15+ meg ohms, and I had 28k+ ohms on all the output transistors

Wow. Your camera is epic. O_O

Did you check all the power supplies?