MFW-15 "Bad" Amp Return

[uw69]

Had this e-mail exchange with Mark Joslin:

From: Robert Kirk [mailto:[email protected]]
Sent: Thursday, March 05, 2009 9:06 AM
To: [email protected]
Subject: Return of "bad" MFW-15 Amp



I still have the bad amp out of one of my MFW-15. Do you guys want it back? Address to send it too? Thanks



Bob kirk

Do not resent growing old. Many are denied the privilege.


rom: Mark Joslin / AV123 ([email protected])
Sent: Thu 3/05/09 1:33 PM
To: 'Robert Kirk' ([email protected])

Hi,

Actually, we received credit from our manufacturer, so you can just dispose of the “bad” amp. thanks



Kindest regards,



Mark Joslin

Technical Care Manager

(303) 543-7500 x 312 direct

(720) 494-1751 fax

[email protected]

https://www.av123.com

Anyone else throwing these bad amps away?

[soloz2]

sounds like we can take a look and see if we can figure out what's wrong! lots and lots of pictures! :rock:

[dweekie]

Hmm, anyone want to dispose of one to me? I wouldn't mind :poke: at it.

[uw69]

PM me your address and I'll send it off to you. Let us know what you find!

[woofersus]

Mark indicated to me on the phone a couple of days ago (mine died for the second time) that the primary cause of premature death for these is capacitor failure. The question I guess becomes "did anything else get fried when it went." I'm about to have two of them sitting here that I keep thinking I'll investigate further.

[soloz2]

caps are usually easy to spot when they go bad. replacing a cap shouldn't be too difficult.

[DavidJames]

caps are usually easy to spot when they go bad. replacing a cap shouldn't be too difficult.

Mine was pretty easy to find. It was the only cap that was sitting alone on the floor inside the amp cavity. :)

[uw69]

Mark indicated to me on the phone a couple of days ago (mine died for the second time) that the primary cause of premature death for these is capacitor failure. The question I guess becomes "did anything else get fried when it went." I'm about to have two of them sitting here that I keep thinking I'll investigate further.

I had another MFW-15 amp go out, a couple of days ago. Talked to Mark Joslin and I'm on the list for one of the new amps when they come in. Hopefully at the end ofarch.

[uw69]

Hmm, anyone want to dispose of one to me? I wouldn't mind :poke: at it.

Dweekie, did you get the MFW-15 "bad" amp I sent you?

[alphaiii]

Mark indicated to me on the phone a couple of days ago (mine died for the second time) that the primary cause of premature death for these is capacitor failure. The question I guess becomes "did anything else get fried when it went." I'm about to have two of them sitting here that I keep thinking I'll investigate further.

Failing capacitor is the same reason I was given for the hum and standby thump with my x-sub amp.

Did the MFW amps come from the same manufacturer?

[dweekie]

Dweekie, did you get the MFW-15 "bad" amp I sent you?

Yes, I got it. Sorry for not updating you on that. Ordering some new parts now; hopefully it'll come alive once again. So far, the power supply tests fine. Working through the amp board now.... I didn't see any failed capacitors. Anybody that's had one, do you remember what color it was?

[JimP]

Any news??

[JimP]

Mine was pretty easy to find. It was the only cap that was sitting alone on the floor inside the amp cavity. :)

By any chance, did you try to solder it back into the circuit board?....or was it otherwise damaged?

[Lanceb1b]

Any news??

I Pm'ed (Dweekie) the same question either he elected not to respond or didn't get it:scratchchin:

Lance

[dweekie]

Ah, I got 2 PMs (not PMS) about the amp. I'm a bit slow with those. I need to replace the fets; also got some insulators to fit between the fets and the chassis since they weren't originally there. I'm making some slow progress...... None of the caps seem blown, but I feel like I should replace them with the reports that some of them have blown up .... hmmm....