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Author Topic: Crackling sound on my A4000T... who does repairs ??  (Read 2855 times)

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Offline Kristian95Topic starter

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Crackling sound on my A4000T... who does repairs ??
« on: May 13, 2008, 01:49:17 AM »
Alas my A4000T has now developed the crackling sound issue  I've read about the need to change capacitors, but I am not up for that task myself... is anyone doing these kinds of repairs (preferably in the US, but worldwide is ok)?
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Offline Damion

Re: Crackling sound on my A4000T... who does repairs ??
« Reply #1 on: May 13, 2008, 02:11:45 AM »
This is the only guy I know of here in the US:

http://www.amiga-news.de/en/news/AN-2007-12-00002-EN.html

I can't say firsthand, but I've heard other members highly recommend him.



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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #2 on: May 13, 2008, 02:35:02 AM »
cool... is there any way to contact him by e-mail by chance ?? :)
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Offline Vlabguy1

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #3 on: May 13, 2008, 03:09:10 AM »
Your caps are leaking on the A/V module board.  Just buy a new one.
Or you could have the caps replaced.  

I could do the repair for ya..as long as you pay for the capacitors.  Im located in
NY.

Rich
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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #4 on: May 13, 2008, 03:21:57 AM »
I'd be happy to pay for the caps as well as buy you a couple of brews :) I'll PM you details :)
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Offline MozzerFan

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #5 on: May 13, 2008, 03:23:21 AM »
Vesalia.de sells the a/v module for 20 euros.

Regards,
Lloyd
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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #6 on: May 13, 2008, 03:25:05 AM »
I saw that, but I am wondering how long the caps on those modules will last... and if I can save my hardware for the same (or lesser) amount I'd do that, just to keep more miggy hardware available :)
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Offline da9000

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #7 on: May 13, 2008, 03:59:46 AM »
Hey Kristian,

I can help you out with leaky caps:

http://www.amiga.org/gallery/index.php?n=2353

I'm in NorCal if you feel like driving ;-)

Cheers
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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #8 on: May 13, 2008, 04:09:10 AM »
@da9000

Cool!! I am in the Bay area myself, between SF and San Jose :)
Btw, would you be able to do a replacement of Caps on other parts of my miggy too (just for safetys sake) :)

Cheers,

Kristian
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Offline vk3heg

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #9 on: May 13, 2008, 07:58:23 AM »
Quote

da9000 wrote:
Hey Kristian,

I can help you out with leaky caps:

http://www.amiga.org/gallery/index.php?n=2353

I'm in NorCal if you feel like driving ;-)

Cheers


Couldn't you make the picture any bigger?  :-D :pint:

Seriously, how'd you get the great pic? (Mine turn out like the stuff out of a cows rear end ).... :-(
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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #10 on: May 14, 2008, 04:21:45 PM »
@da9000:

PM sent ;)
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Offline darksun9210

Re: Crackling sound on my A4000T... who does repairs ??
« Reply #11 on: May 14, 2008, 04:28:30 PM »
it probably is the caps, but another cause of crackly sound, i had pointed out to me by the good people of this forum, is that maybe your -12V line isn't minus twelve volts anymore?

my old A4000T used to eat PSU's on a yearly basis. it was so fully loaded and be drawing so much current on the 5V line, that the crappy AT type power connectors in the PSU plug (bendy thin bits of copper) would have melted away. new PSU required. just thinking this may have manifested itself in some other symptom...

might be advisable to check with a new PSU. unless of course, you can see leaking gunk comming out of the caps :-D in which case, i'll  shut up :-)
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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #12 on: May 14, 2008, 06:28:26 PM »
ah ok... I'll open the puppy and take a look...
It's not that loaded though.... it has a P-IV card, the CSPPC card, an eFlash card, a SCSI cd-rom drive and an cf card as harddrive... all in all the psu ought to be able to handle that :)
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Offline Kristian95Topic starter

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #13 on: May 14, 2008, 10:43:27 PM »
I checked the audio module. While there isn't guhnk all over it, two of the capacitors had sort of a bit of "spider web" liks stuff by the side and the solder on one side of them is not shiny anymore... so I think the caps have only just started leaking (??)
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Offline da9000

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Re: Crackling sound on my A4000T... who does repairs ??
« Reply #14 on: May 17, 2008, 03:25:48 AM »
@Kristian:

Sorry for the delayed response. I've been quite busy and hadn't checked back :-/

We're practically neighbors! I'll email ya.

And yes, I'd replace'em all, just to be safe, because they WILL leak in the future (or dry up).

From your description further down, it sounds like it's the leaky caps that's your problem.


@vk3heg:

Quality beats quantity! :-)

But seriously, I used the macro feature of my digital camera, and I was able to come close. Use plenty of light, so that way the photos don't come out shaky. If you use flash from close range, I put some paper or something to dampen the brightness and get less specular highlights (which makes things hard to see as they become totally white).

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