My 500+ Project

[djos]

Hi All, my 500+ finally arrived and so I eagerly took it apart and inspected it - not in the best of condition unfortunately and going to need either surgery or a heart transplant.

The battery has definitely leaked and some how caused corrosion to the Gary Socket Contacts which mostly disintegrated when I removed the Gary Chip - The chip itself seems to be fine and I was able to clean it up quite well.

Gary Socket:
http://dl.dropbox.com/u/71121999/Amiga/Photo%2015-06-12%206%2051%2008%20PM.jpg

Not yet cleaned up Gary Chip:
http://dl.dropbox.com/u/71121999/Amiga/Photo%2015-06-12%206%2052%2007%20PM.jpg

Bad battery!:
http://dl.dropbox.com/u/71121999/Amiga/Photo%2015-06-12%206%2051%2031%20PM.jpg

Bad Battery Removed showing some surface Damage to the PCB - I wonder if this has killed the Mobo?:
http://dl.dropbox.com/u/71121999/Amiga/Photo%2015-06-12%207%2028%2008%20PM%20(HDR).jpg

There was also a tiny amount of rust on a couple of the Shields but it hadn't done any damage to the Mobo.

So Im hoping I can just replace the broken Gary Socket (AJ, might need your help on this one as I dont have a de-soldering station) to revive my poor 500+ otherwise it's going to need a heart transplant. :nervous: :eek:

[djos]

*runs away and hides*

What do you reckon AJ, do you have the skilz to de-solder the Gary socket and help me put in a new one? (the installing socket part I can manage, it's the removing part I cant)

[djos]

Damn that is a lot of acid damage to the mobo...  its crawled its way to many IC and sockets  so sad to see a A500+ in this condition.

The Gary chip should be okay, the socket might clean up well without needing to replace. A thin stiff brush and alcohol to clean away all the mess. The resisters on the right hand side of the removed battery look bad, maybe if you going to resolder a Gary socket you should replace these as well.

Best of luck! Hope you can revive this poor Miggy

Az

Nah the socket is totalled - see the pic below (contacts are broken, some literally shattered when i removed the chip.

http://dl.dropbox.com/u/71121999/Amiga/Photo%2015-06-12%207%2028%2021%20PM%20(HDR).jpg

[djos]

did you buy this as "working"?

Bought as "powers up but can't fully test". I'm not too bothered as restoration is half the fun. It might have actually worked as is had I not pulled out the Gary chip for a Look. :cool:

[djos]

looking at the pics, I don't think it would have worked at all.

I could be wrong, but it appears there's tracks corroded completely through.

bit late now, but I would have tested it before removing the ic :p

Yeah good old hind sight, I underestimated how much corrosion damage there was to the socket - oh well, I'm putting out feelers for a new mobo and I might buy a 1200 when petro makes them available.

[djos]

Are you wanting to sell the faulty 500 plus board? You can take all the chips etc out, just needing the component above the denise chip. Will take a photo and up it a little later.

Although my soldering skills suck ;-)

I was either going to keep it and use the chips for spares or once I hopefully get a new mobo sell the spare chips etc to recover costs. See what happens tho.

[djos]

Btw if anyone has a Gary compatible chip socket they can sell me I am going to try to repair my 500+ board first.

[djos]

Buy two 24 pin sockets from jaycar for 60 cents each

Good idea! I'll pay them a visit tomorrow. :cool:

Btw, I figured out how to remove the broken socket, just used my side cutters to break it up into small pieces making de-soldering easier.

[djos]

Shipping was 50£ but I don't regret it.

[djos]

Thanks mate, i really appreciate the offer

[djos]

Thanks Az I'll be working pretty hard to fix my 500+ :cool:

[djos]

Just got back from Jaycar with 2x 24 pin ic sockets and a new can of isoprophyl, gonna have to wait till later tonight tho as off to see my folks for the arvo.

[djos]

Good tips, thanks as the last proper techie job I had was in the late 90's so I've forgotten a lot of these tricks.

[djos]

Well after a hard nights careful de-soldering (last night) I was able to remove half the Gary Socket and only have the other half to go (old solder is a pain to work with).

I was also able to clean the motherboard with Isoprophyl and a toothbrush/rag and it came up really well, so well in fact that I couldn't find a single damaged trace or area missing lacquer (mainly just discoloration) so now Im really optimistic that I'll be able to return my Miggy 500+ to full health! :cool:

[djos]

Good to hear!

Indeed, just need to finish replacing the socket and plug her in when my new PSU shows up. *fingers Crossed*