XPA-3 Crapped out. Need parts...

[kraddy]

Is there a supplier in Canada?

The centre channel GXPA-5V04 circuit board, if you look closely, had some type of explosion below the '5V04'.

I assume that centre circuit board can be ordered and replaced??

Lastly, when turned on, all lights turn blue, as if there isn't any issue. The tick noise only sounds for this effed centre.

[ttocs]

Nov 3, 2020 15:30:20 GMT -5 kraddy said:

The centre channel GXPA-5V04 circuit board, if you look closely, had some type of explosion below the '5V04'.

I see only one possible problem. In-between the cooling fins at the bottom of the 5V04 board I thought at first it was dust build-up, but upon closer examination it appears to be an exploded part, is that a capacitor? And there's a missing part where that circle is on the board. A clearer photo in that specific area would help with determining which parts were taken out. Look for the part location number, like C004, Q023, etc.

The board should removable with a little effort, then the board could be cleaned up with spray electronics cleaner. Also, look for the missing parts in the bottom of the amp.

[kraddy]

Here's a couple more pics. Explosion confirmed...

As far as taking it out, I don't believe I have the qualifications...

I would still like to know if I can order parts, or would the blown pieces be an easy fix for the local audio shop?

[DYohn]

No idea if they will sell you the board but contact Emotiva.

[ttocs]

Nov 4, 2020 11:21:37 GMT -5 kraddy said:

View AttachmentView Attachment
Here's a couple more pics. Explosion confirmed...

As far as taking it out, I don't believe I have the qualifications...

I would still like to know if I can order parts, or would the blown pieces be an easy fix for the local audio shop?

Those capacitors are easy to replace, it looks like the values are printed right on the board. It's not a difficult task to clean up the board and replace the two capacitors. The question is, what caused them to fail? A tech could replace the parts, then test the circuits under power to see if things are in-range. 

Whether the failure was due to heat, over-voltage, or some defect, it really should be diagnosed for confidence in a repair. If these two capacitors failed due to "leakage" or drying out, that would mean that all the capacitors should be checked and probably replaced to thwart the nearing end of life for those parts.

Upon a closer look, my guess is that it's heat damage. Directly left of the mine field is R082 which looks scorched in the middle and maybe fractured. Look to the right where that 5W white resistor (R036) is, then look at the burnt board. That smaller resistor (R035) is probably way out of spec from getting burnt to a crisp, as well as which ever part is hidden by that 5W resistor.

Except for the explosions, this reminds me of when I replaced a bunch of scorched parts in an old Carver TFM-25 amp. The parts I replaced were a known defect and the parts are listed as sort of a "kit" when the need to replace a couple specific transistors comes up in these amps. It's one of those - it's gonna happen eventually - things.

[kraddy]

Thank you for the info, much appreciated!

[kraddy]

Emotiva will not sell a PCB, but they quoted me $250 for a non warranty fix, so I shall be shipping it back to them for a fix.

[ttocs]

Nov 4, 2020 17:53:26 GMT -5 kraddy said:

Emotiva will not sell a PCB, but they quoted me $250 for a non warranty fix, so I shall be shipping it back to them for a fix.

Wow! Sounds like a good deal!