Can anyone identify this RAM expansion board?? - Page 2

Skylight · 30 July 2009, 04:09

Quote:

Originally Posted by PowerPie5000

I read it somewhere, it was for another A500 expansion similar to mine and it said something about requiring KS 1.3? I have different versions of KS so it's no problem

This could be the case for IDE-Adapters with connection to the CPU socket.

Ciao, Rick ...

whiteb · 30 July 2009, 05:21

Quote:

Originally Posted by alexh

It is probably a Zydec A500 1.5Mbytes (bringing the total to 2Mbytes)

It is a TrapDoor slow mem RAM card with a gary/68000 board to increase the address lines to more than 512Kbytes.

It plugs into the trap door and you take out either the Gary or the 68000 and plug it into the smaller board and then into the motherboard.

It is a way of adding more than 512Kbytes more RAM via the TrapDoor.

Not a bad buy for £14!

I have a board in my A500 trapdoor to add 4MB (4x1MB simms)

PowerPie5000 · 31 July 2009, 15:23

I am really starting to hate some of the dishonest people on ebay... they p*ss me off!

I received the expansion board and it is in a very bad state! the seller said there were no signs of battery leakage...... it has corrosion everywhere around the battery!! The traces have been eaten away and the jumper pins are green! I don't think this will ever work

The seller is either blind or a liar

Paul_s · 31 July 2009, 15:27

I had a very similar looking board to that but from Power computing. Needless to say it also suffered the same fate with battery corrosion. The Gary socket piggy back module was obliterated and I ended up chucking it away...

You could always try removing the battery and soaking it in a mix of baking soda/water... that brings off battery acid very nicely...

PowerPie5000 · 31 July 2009, 16:19

Quote:

Originally Posted by Paul_s

I had a very similar looking board to that but from Power computing. Needless to say it also suffered the same fate with battery corrosion. The Gary socket piggy back module was obliterated and I ended up chucking it away...

You could always try removing the battery and soaking it in a mix of baking soda/water... that brings off battery acid very nicely...

I will give the baking soda a go but the tracks/traces by the battery have pretty much gone

but hopefully they were only for the battery... i don't need a clock

rkauer · 31 July 2009, 19:17

Carefully removing the corrosion and with some luck you can see the eaten traces and remake them with soldered wires.

alexh · 31 July 2009, 19:46

Rechargeable batteries are alkaline not acid. You need a weak acid to neutralise, not a base like baking soda.

Take some photos of it. If it is not obviously 100% dead you can send it me and I'll repair it.

PowerPie5000 · 31 July 2009, 20:32

Quote:

Originally Posted by alexh

Rechargeable batteries are alkaline not acid. You need a weak acid to neutralise, not a base like baking soda.

Take some photos of it. If it is not obviously 100% dead you can send it me and I'll repair it.

Thanks for the offer! i will try and get some pics uploaded... the damage looks quite serious to me and i was thinking about repairing it but i am not sure if it can be done?

PowerPie5000 · 31 July 2009, 21:03

Ok here are a few pics of the damaged area... i have left the battery attached for now just incase it is unrepairable and i may be able to get a refund as the seller said "there are no signs of battery leakage"

Notice the large trace in the top-right corner is completely destroyed and green!! there is also a trace under the battery that is green and crispy too!

lopos2000 · 31 July 2009, 21:09

Quote:

Originally Posted by PowerPie5000

Ok here are a few pics of the damaged area... i have left the battery attached for now just incase it is unrepairable and i may be able to get a refund as the seller said "there are no signs of battery leakage"

Maybe he is blind

PowerPie5000 · 31 July 2009, 21:12

Quote:

Originally Posted by lopos2000

Maybe he is blind

It actually looks worse looking at it! the photo's kind of make it look not so bad.

dire_wolf · 31 July 2009, 21:16

Doesn't look too bad mate, easily repairable if you have the know how. i cant make out whether the copper etch is gone or whether it's corroded, i suspect it's the latter and easily cleanable/fixable.

PowerPie5000 · 31 July 2009, 21:22

The Gary adapter will not seat correctly due to some moron breaking one of the legs/pins and then repairing it with a big blob of solder so now it does not slot properly into the socket

@dire_wolf
It actually looks worse than it does in the pictures! I am handy with a soldering iron but i have never repaired traces before! I suppose i could do what rkauer mentioned and just join the corroded gaps in the traces with a bit of wire and solder?

The large trace in the top right corner with the "+" sign on it looks quite bad.... all green and crispy!! I think the copper has actually rotted away in that corner

dire_wolf · 31 July 2009, 21:27

I've had to do that a couple of times on PC motherboards etc. It's just a case of using something like a small craft knife to scrape at the very top layer of the copper, to reveal the trace and give you a footing for the solder, then bridge it with a suitable gauge of wire. Don't forget to give it a good clean up first though.

:EDIT: Thinking about it why bother? A500 expansion boards aren't uncommon or expensive so chuck this thing back at the seller and tell them to list things properly in the future, how else will they learn? Get a refund then get something thats been looked after lol

PowerPie5000 · 31 July 2009, 21:33

Quote:

Originally Posted by dire_wolf

:EDIT: Thinking about it why bother? A500 expansion boards aren't uncommon or expensive so chuck this thing back at the seller and tell them to list things properly in the future, how else will they learn? Get a refund then get something thats been looked after lol

This is a 2mb expansion for a standard A500 with a Gary adapter! It's not very common or easy to find.... there are plenty of 512k expansions but i want more ram than the standard 1mb

alexh · 31 July 2009, 22:05

Doesn't look too bad.

Snip that battery off as soon as possible and neutralise the alkali using a weak acid like lemon juice. Give it a good clean with an old tooth brush but not too hard.

Lets see some underside photos.

That battery looks like it has been replaced and is not the one that leaked?

As with all "Free" fixes, if you want to send it to me you must send it registered delivery and include the right amount of postage stamps for it to be returned. No stamps, no return. Simple as that. PM me for the postal address.

I do not have an Amiga 500 that I can use to test it (only got an A500+) the fixes will be continuity only.

alexh · 31 July 2009, 22:14

Quote:

The large trace in the top right corner with the "+" sign on it looks quite bad.... all green and crispy!! I think the copper has actually rotted away in that corner

That is only the ground plane, it will be fine. This is an ultra-simple 2-layer board. It will be easy to fix, assuming it is even broken.

Once you've remove the battery and cleaned it up... it would be worth trying if there are no broken traces....

Shame I no-longer live in Preston or you could have popped it over

PowerPie5000 · 31 July 2009, 22:26

Ok here are some pics of the underside... it's not too bad at all, just a bit of corrosion around the battery solder spots and a small corroded trace under the "9211" numbers.

PowerPie5000 · 31 July 2009, 22:29

I am now going to de-solder the battery and give it a quick clean with an old soft toothbrush and a squirt of lemon... Just as alexh suggested

EDIT: i have just been offered a refund from the seller.... or an exchange for other miggy stuff so i will put the repair on hold for the moment in case he needs the board back!

Firthy2002 · 01 August 2009, 01:29

Pity that it's damaged, bloody lying ebayer!

31 July 2009, 21:03	#29
PowerPie5000 Miggy Ate My Hamster! Join Date: Nov 2008 Location: Lancashire, UK Posts: 1,566	Ok here are a few pics of the damaged area... i have left the battery attached for now just incase it is unrepairable and i may be able to get a refund as the seller said "there are no signs of battery leakage" Notice the large trace in the top-right corner is completely destroyed and green!! there is also a trace under the battery that is green and crispy too! Last edited by PowerPie5000; 18 November 2009 at 13:24.

31 July 2009, 22:05	#36
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,448	Doesn't look too bad. Snip that battery off as soon as possible and neutralise the alkali using a weak acid like lemon juice. Give it a good clean with an old tooth brush but not too hard. Lets see some underside photos. That battery looks like it has been replaced and is not the one that leaked? As with all "Free" fixes, if you want to send it to me you must send it registered delivery and include the right amount of postage stamps for it to be returned. No stamps, no return. Simple as that. PM me for the postal address. I do not have an Amiga 500 that I can use to test it (only got an A500+) the fixes will be continuity only. Last edited by alexh; 31 July 2009 at 22:13.

31 July 2009, 22:26	#38
PowerPie5000 Miggy Ate My Hamster! Join Date: Nov 2008 Location: Lancashire, UK Posts: 1,566	Ok here are some pics of the underside... it's not too bad at all, just a bit of corrosion around the battery solder spots and a small corroded trace under the "9211" numbers. Last edited by PowerPie5000; 18 November 2009 at 13:24.

31 July 2009, 22:29	#39
PowerPie5000 Miggy Ate My Hamster! Join Date: Nov 2008 Location: Lancashire, UK Posts: 1,566	I am now going to de-solder the battery and give it a quick clean with an old soft toothbrush and a squirt of lemon... Just as alexh suggested EDIT: i have just been offered a refund from the seller.... or an exchange for other miggy stuff so i will put the repair on hold for the moment in case he needs the board back! Last edited by PowerPie5000; 31 July 2009 at 23:10.

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31 July 2009, 15:23	#23
PowerPie5000 Miggy Ate My Hamster! Join Date: Nov 2008 Location: Lancashire, UK Posts: 1,566	I am really starting to hate some of the dishonest people on ebay... they p*ss me off! I received the expansion board and it is in a very bad state! the seller said there were no signs of battery leakage...... it has corrosion everywhere around the battery!! The traces have been eaten away and the jumper pins are green! I don't think this will ever work The seller is either blind or a liar

31 July 2009, 15:27	#24
Paul_s Registered User Join Date: Nov 2006 Location: Amigaville Age: 46 Posts: 3,337	I had a very similar looking board to that but from Power computing. Needless to say it also suffered the same fate with battery corrosion. The Gary socket piggy back module was obliterated and I ended up chucking it away... You could always try removing the battery and soaking it in a mix of baking soda/water... that brings off battery acid very nicely...

31 July 2009, 19:17	#26
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Carefully removing the corrosion and with some luck you can see the eaten traces and remake them with soldered wires.

31 July 2009, 19:46	#27
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,448	Rechargeable batteries are alkaline not acid. You need a weak acid to neutralise, not a base like baking soda. Take some photos of it. If it is not obviously 100% dead you can send it me and I'll repair it.

31 July 2009, 21:16	#32
dire_wolf Registered User Join Date: Jul 2009 Location: Stockport, UK Posts: 14	Doesn't look too bad mate, easily repairable if you have the know how. i cant make out whether the copper etch is gone or whether it's corroded, i suspect it's the latter and easily cleanable/fixable.

31 July 2009, 21:22	#33
PowerPie5000 Miggy Ate My Hamster! Join Date: Nov 2008 Location: Lancashire, UK Posts: 1,566	The Gary adapter will not seat correctly due to some moron breaking one of the legs/pins and then repairing it with a big blob of solder so now it does not slot properly into the socket @dire_wolf It actually looks worse than it does in the pictures! I am handy with a soldering iron but i have never repaired traces before! I suppose i could do what rkauer mentioned and just join the corroded gaps in the traces with a bit of wire and solder? The large trace in the top right corner with the "+" sign on it looks quite bad.... all green and crispy!! I think the copper has actually rotted away in that corner

31 July 2009, 21:27	#34
dire_wolf Registered User Join Date: Jul 2009 Location: Stockport, UK Posts: 14	I've had to do that a couple of times on PC motherboards etc. It's just a case of using something like a small craft knife to scrape at the very top layer of the copper, to reveal the trace and give you a footing for the solder, then bridge it with a suitable gauge of wire. Don't forget to give it a good clean up first though. :EDIT: Thinking about it why bother? A500 expansion boards aren't uncommon or expensive so chuck this thing back at the seller and tell them to list things properly in the future, how else will they learn? Get a refund then get something thats been looked after lol

01 August 2009, 01:29	#40
Firthy2002 2nd era... Join Date: Sep 2004 Location: Leeds, England Age: 40 Posts: 288	Pity that it's damaged, bloody lying ebayer!

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