audio module amiga 4000(T)

sayasupacrew · 25 May 2019, 18:13

I am looking for the audio module of the amiga 4000 T, if you go one, offer me?, Mine is well tired.

thomas vivet like saya

theq · 25 May 2019, 19:02

Have no clue about this module, but it seems something has been leaking in the middle of the card (around R320D).

sayasupacrew · 25 May 2019, 23:35

the module has just been recaped, but that did not change anything.

I tested the module, I have very weak (15%) and there are only the first two channel.

Hewitson · 26 May 2019, 02:45

It might have been recapped, but as said, those resistors look terrible.

4pLaY · 26 May 2019, 03:11

I am looking for one of these myself. However, the one you have there clearly has some serious issues, the leakage needs taking care of asap.

You say the module has been recapped already, whoever did that one has not done a very good job.

theq · 26 May 2019, 09:05

IMHO, this thing needs a proper cleanup and some tracing to make sure everything is connected the way it is supposed to.

Looking at it again I would start with some vinegar and a brush (preferably anti-static). Then clean it with some isopropyl alcohol (IPA) using a cotton swabs (or the likes).
Concentrate the cleaning to the centre part of the module. U320 - R320D - D503 area.

By doing this you will most likely not fix it permanently. Your solder pads will continue to corrode, but you will at least stop it for a while (probably years). Ideally you should remove the old solder and reapply with new after another cleanup. I'd recommend using a hot air gun over a soldering iron removing the old components. Remember that heat accelerates corrosion.

Also, the resistor in the top-right corner (R300B) was poorly re-soldered but probably still working.
Seems like a solder pad on D505 has failed too. At least check it out. Seems like the solder has shifted to the right.

Good luck, have fun!

25 May 2019, 18:13	#1
sayasupacrew Registered User Join Date: Jul 2009 Location: noirmoutier france Age: 54 Posts: 45	audio module amiga 4000(T) I am looking for the audio module of the amiga 4000 T, if you go one, offer me?, Mine is well tired. thomas vivet like saya

26 May 2019, 03:11	#5
4pLaY www.resistance.no Join Date: Jun 2008 Location: Norway Age: 43 Posts: 201	I am looking for one of these myself. However, the one you have there clearly has some serious issues, the leakage needs taking care of asap. You say the module has been recapped already, whoever did that one has not done a very good job. Last edited by 4pLaY; 26 May 2019 at 03:18.

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25 May 2019, 19:02	#2
theq Registerdeaded abUser Join Date: Sep 2013 Location: Beyond the Wall Age: 46 Posts: 114	Have no clue about this module, but it seems something has been leaking in the middle of the card (around R320D).

25 May 2019, 23:35	#3
sayasupacrew Registered User Join Date: Jul 2009 Location: noirmoutier france Age: 54 Posts: 45	the module has just been recaped, but that did not change anything. I tested the module, I have very weak (15%) and there are only the first two channel.

26 May 2019, 02:45	#4
Hewitson Registered User Join Date: Feb 2007 Location: Melbourne, Australia Age: 41 Posts: 3,773	It might have been recapped, but as said, those resistors look terrible.

26 May 2019, 09:05	#6
theq Registerdeaded abUser Join Date: Sep 2013 Location: Beyond the Wall Age: 46 Posts: 114	IMHO, this thing needs a proper cleanup and some tracing to make sure everything is connected the way it is supposed to. Looking at it again I would start with some vinegar and a brush (preferably anti-static). Then clean it with some isopropyl alcohol (IPA) using a cotton swabs (or the likes). Concentrate the cleaning to the centre part of the module. U320 - R320D - D503 area. By doing this you will most likely not fix it permanently. Your solder pads will continue to corrode, but you will at least stop it for a while (probably years). Ideally you should remove the old solder and reapply with new after another cleanup. I'd recommend using a hot air gun over a soldering iron removing the old components. Remember that heat accelerates corrosion. Also, the resistor in the top-right corner (R300B) was poorly re-soldered but probably still working. Seems like a solder pad on D505 has failed too. At least check it out. Seems like the solder has shifted to the right. Good luck, have fun!

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