It appears to be a v2 amp because of the 7 fan blades:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/7c315abc44c368ea693565050f8b5d35_zps6c508dba.jpg)
But then I noticed few traits that my other 0.5s don't have.
1) burns on the fan board by the resistor:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/4a24834da67c88002d6a424d71834040_zps42c9ca7d.jpg)
2) strange angle to the rectifiers:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/5505c09df7b0aed5cb2a1cb29a181c84_zpsde0b540f.jpg)
3) the side blades (not sure what they are called) came off when I removed the end plates. On this amp they are cut into 3 pieces each and are screwed onto the heat sink plates.
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/3e93818520b44aa30660bb9a4b5ccffe_zps02896df4.jpg)
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/687b316bc7db5c9c3afdf7ed046d6a3d_zps04a82bfb.jpg)
4) this s/n seems a bit on the low side. Must have been early in the production run
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/15e82bbdf79f9b2f001bb2500587ba3a_zpsa692117f.jpg)
I also recall seeing printing on my other boards saying ZPA0.5v2. Don't see that on here.
So as I took the covers off I felt that the gold traces are shinier than my other amps (maybe I am crazy).
I knew that the caps were replaced as they weren't original values, but not sure what to think of this...I know that the m series had caps hot glued together, never seen it on a ZPA.
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/564179631d1fc73445ee7827046085b3_zps499a892e.jpg)
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/9165efb05af9dbfafeb9a1732e1bcbc2_zps2d5742e3.jpg)
And then when I looked under I made some entirely new observations:
2 bad cap vias:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/1b2b14f37d1933a7bcfb40c3e2575b99_zps406a14c1.jpg)
Fets were replaced (probably upgraded, I will verify later) but no damaged vias:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/d5f26febe0e9aa207a6d24d0a9eb7678_zps7098fc25.jpg)
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/b381a244b21223b77270ea9d1c559839_zps912a08af.jpg)
Not a huge fan of the soldering job done to the caps:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/4e743e629e72e9a201171b39f1fe9ccc_zps7d1f0a10.jpg)
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/36184a15ef706e347430282d808cdcaa_zpsf1c7a83c.jpg)
And looking closer at the repair job when the fan resistors were replaced, not a huge fan of the job done here either:
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/84d0a9d50ced1ed5680176a0a7dc3c2b_zps5afacc42.jpg)
![Image](http://i251.photobucket.com/albums/gg291/ls1dave/phoenix%20gold%20zpa05/3c6b7906202d1bcaf0fcf8178460fa19_zps373c5422.jpg)
I powered the amp up and it works. I checked the cd offset and it was less than 1mv on the right side but about 7-8 mv on the left. I adjusted it down to less than 1mv.
On this amp I plan to replace the caps again, but with 8200 uf caps. I also plan to remove each heat sink and replace the thermal paste with the Antec formula 6 stuff that I used on the other ZPA. This way I can further check the fets to see which ones are in there and inspect for any burned parts.
Any feedback? Anything that I'm missing that I should look for.