A2500 battery leakage cleanup

Dreamcast270mhz · 22 December 2009, 16:16

I have gotten an A2500 barebones from the gracious Redrumloa. He let me know it had battery leakage before I bought it. Well, it arrived this past weekend, and I've been trying to clean it off. I've used a toothbrush with IPA, baking soda and just by itself, but no luck. I was told on amibay to put it in dishwasher without drying cycle, but shouldn't I remove the chips first? and do i need soap, or is there a better way? Just to let Zetro know, just getting a second opinion before I flush sixty bucks down the drain

dannyp1 · 22 December 2009, 17:05

Vinegar and the toothbrush. What is the dishwasher going to clean off that the toothbrush won't? You will never make it look new and like the battery never leaked. You just need to make sure the acid is neutralized so no more damage is done.

Dan

Muzer · 22 December 2009, 17:36

Quote:

acid

alkali, if you're using vinegar to clean it anyway - acid if you're using bicarbonate of soda or toothpaste. Not sure what the batteries are in Amigas.

alexh · 22 December 2009, 17:43

Rechargeable batteries in an Amiga is always alkaline so you need a weak acid to neutralise. Diluted lemon juice or better diluted white vinegar.

Baking Soda is the wrong thing to use.

Use some litmus paper if you don't believe me.

But cleaning and neutralising battery leakage is not going to repair dead tracks. If it does not work as is, you're gonna have to use a multimeter to measure the resistance of tracks and possibly repair them with jumpers. However this is a mult-layer board and you can of course only repair the top & bottom layers.

Dreamcast270mhz · 22 December 2009, 18:15

It was ni-cd, so i'll use lemon juice and IPA afterwards. I'm justyring to clean as much acid residue as possible. There are no dead tracks on the top layer i can tell you, the track that runs through the center is clear of residue... odd. The machine works, but i think it has a bad paula in it or CIAS, it has no sound, either that or caps where teh audio circuits are to blame.

alexh · 22 December 2009, 18:21

White vinegar will be less sticky but if you are going to go over with IPA I doubt it matters.

rkauer · 24 December 2009, 03:04

Normal capacitors hardly will dye entirely. In this case I recommend you to replace Paula.

Capacitors from A1000/500(+)/3000(T)/2000 (and sub-versions) normally just lose some of their capacitance over the years.

Dreamcast270mhz · 25 December 2009, 23:06

Weirdly, since getting my 3000, I've put this aside. Oh well, after X-mas dies down, I'll get it open again, go over with mild acid, and email softhut about a paula for $8. And I'll check to see if any vias were affected (if it has any

)

Fingerlickin_B · 26 December 2009, 10:03

Hint: Go to a brewing shop or chemist & buy some Iodophor solution (Iodine & Phosphoric Acid).

Squirt it all over the motherboard (use a syringe, it stains skin badly) & let it sit for about 30 mins, then run in the dishwasher (turn off before drying cycle starts).

I tried many bottles of vinegar when my A2000 had this problem & it didn't work as well as expected...Iodophor blew that stuff right off!

Another up-side is that you don't have to physically scrub already comprimised PCB tracks!

PZ.

Dreamcast270mhz · 29 December 2009, 04:23

Quote:

Originally Posted by Fingerlickin_B

Hint: Go to a brewing shop or chemist & buy some Iodophor solution (Iodine & Phosphoric Acid).

Squirt it all over the motherboard (use a syringe, it stains skin badly) & let it sit for about 30 mins, then run in the dishwasher (turn off before drying cycle starts).

I tried many bottles of vinegar when my A2000 had this problem & it didn't work as well as expected...Iodophor blew that stuff right off!

Another up-side is that you don't have to physically scrub already comprimised PCB tracks!

PZ.

In that case, could i use coca-cola? It has (IIRC) phoshoric acid and carbonic too? Of course, using 50-50 water/ipa to clean it afterwards?

Fingerlickin_B · 29 December 2009, 05:59

Quote:

Originally Posted by Dreamcast270mhz

In that case, could i use coca-cola? It has (IIRC) phoshoric acid and carbonic too? Of course, using 50-50 water/ipa to clean it afterwards?

I'd not suggest doing that.

Coke does not contain enough of the good stuff to do anything to help you.

Also, there are ingredients like sugar that might prove difficult to remove from certain areas when rinsing.

Iodophor WILL do what you want, so just grab some of it & you'll be set

PZ.

22 December 2009, 16:16	#1
Dreamcast270mhz Die Copyright holders!!! Join Date: May 2009 Location: White Stone, Virginia, USA Posts: 84	A2500 battery leakage cleanup I have gotten an A2500 barebones from the gracious Redrumloa. He let me know it had battery leakage before I bought it. Well, it arrived this past weekend, and I've been trying to clean it off. I've used a toothbrush with IPA, baking soda and just by itself, but no luck. I was told on amibay to put it in dishwasher without drying cycle, but shouldn't I remove the chips first? and do i need soap, or is there a better way? Just to let Zetro know, just getting a second opinion before I flush sixty bucks down the drain Attached Thumbnails

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22 December 2009, 17:05	#2
dannyp1 Registered User Join Date: Nov 2009 Location: Michigan USA Posts: 168	Vinegar and the toothbrush. What is the dishwasher going to clean off that the toothbrush won't? You will never make it look new and like the battery never leaked. You just need to make sure the acid is neutralized so no more damage is done. Dan

22 December 2009, 17:43	#4
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,344	Rechargeable batteries in an Amiga is always alkaline so you need a weak acid to neutralise. Diluted lemon juice or better diluted white vinegar. Baking Soda is the wrong thing to use. Use some litmus paper if you don't believe me. But cleaning and neutralising battery leakage is not going to repair dead tracks. If it does not work as is, you're gonna have to use a multimeter to measure the resistance of tracks and possibly repair them with jumpers. However this is a mult-layer board and you can of course only repair the top & bottom layers.

22 December 2009, 18:15	#5
Dreamcast270mhz Die Copyright holders!!! Join Date: May 2009 Location: White Stone, Virginia, USA Posts: 84	It was ni-cd, so i'll use lemon juice and IPA afterwards. I'm justyring to clean as much acid residue as possible. There are no dead tracks on the top layer i can tell you, the track that runs through the center is clear of residue... odd. The machine works, but i think it has a bad paula in it or CIAS, it has no sound, either that or caps where teh audio circuits are to blame.

22 December 2009, 18:21	#6
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,344	White vinegar will be less sticky but if you are going to go over with IPA I doubt it matters.

24 December 2009, 03:04	#7
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Normal capacitors hardly will dye entirely. In this case I recommend you to replace Paula. Capacitors from A1000/500(+)/3000(T)/2000 (and sub-versions) normally just lose some of their capacitance over the years.

25 December 2009, 23:06	#8
Dreamcast270mhz Die Copyright holders!!! Join Date: May 2009 Location: White Stone, Virginia, USA Posts: 84	Weirdly, since getting my 3000, I've put this aside. Oh well, after X-mas dies down, I'll get it open again, go over with mild acid, and email softhut about a paula for $8. And I'll check to see if any vias were affected (if it has any )

26 December 2009, 10:03	#9
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	Hint: Go to a brewing shop or chemist & buy some Iodophor solution (Iodine & Phosphoric Acid). Squirt it all over the motherboard (use a syringe, it stains skin badly) & let it sit for about 30 mins, then run in the dishwasher (turn off before drying cycle starts). I tried many bottles of vinegar when my A2000 had this problem & it didn't work as well as expected...Iodophor blew that stuff right off! Another up-side is that you don't have to physically scrub already comprimised PCB tracks! PZ.

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