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Old 06-15-2012, 07:45 PM   #1
djos
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Default My 500+ Project

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/Ami...%2008%20PM.jpg

Not yet cleaned up Gary Chip:
http://dl.dropbox.com/u/71121999/Ami...%2007%20PM.jpg

Bad battery!:
http://dl.dropbox.com/u/71121999/Ami...%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/Ami...PM%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.
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Last edited by djos; 06-15-2012 at 07:59 PM..
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Old 06-15-2012, 08:03 PM   #2
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Default Re: My 500+ Project

*runs away and hides*
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Old 06-15-2012, 08:08 PM   #3
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Default Re: My 500+ Project

Quote:
Originally Posted by AmmoJammo View Post
*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)
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Old 06-15-2012, 09:32 PM   #4
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Default Re: My 500+ Project

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

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Old 06-15-2012, 09:49 PM   #5
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Default Re: My 500+ Project

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Originally Posted by Azryl View Post
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/Ami...PM%20(HDR).jpg
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Old 06-15-2012, 10:14 PM   #6
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Default Re: My 500+ Project

did you buy this as "working"?
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Old 06-15-2012, 10:19 PM   #7
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Default Re: My 500+ Project

Quote:
Originally Posted by AmmoJammo View Post
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.
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Old 06-15-2012, 10:26 PM   #8
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Default Re: My 500+ Project

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
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Old 06-15-2012, 10:30 PM   #9
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Default Re: My 500+ Project

Quote:
Originally Posted by AmmoJammo View Post
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
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.
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Old 06-16-2012, 12:35 AM   #10
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Default Re: My 500+ Project

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 ;-)
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Old 06-16-2012, 12:40 AM   #11
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Default Re: My 500+ Project

Quote:
Originally Posted by Lurch View Post
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.
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Last edited by djos; 06-16-2012 at 12:42 AM..
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Old 06-16-2012, 01:35 AM   #12
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Default Re: My 500+ Project

Btw if anyone has a Gary compatible chip socket they can sell me I am going to try to repair my 500+ board first.
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Old 06-16-2012, 02:03 AM   #13
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Default Re: My 500+ Project

Buy two 24 pin sockets from jaycar for 60 cents each
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Old 06-16-2012, 02:10 AM   #14
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Default Re: My 500+ Project

Quote:
Originally Posted by AmmoJammo View Post
Buy two 24 pin sockets from jaycar for 60 cents each
Good idea! I'll pay them a visit tomorrow.

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.
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Old 06-16-2012, 02:17 AM   #15
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Default Re: My 500+ Project

Did you get this from the UK? If so, how much was the postage?

Shame about the damage, Most of the A500+ ECS compenents should fit in a standard A500 mobo that you could easily get from ebay.com.au, the only chip you may have problems fitting without adjustments is the fatter agnus. Good luck, would like to hear how you go with this.
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Old 06-16-2012, 02:59 AM   #16
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Default Re: My 500+ Project

Shipping was 50 but I don't regret it.
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Old 06-16-2012, 10:12 AM   #17
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Default Re: My 500+ Project

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Shipping was 50 but I don't regret it.
Ohh Man that's a pain. Bad luck. That damage looks pretty comprehensive…
Understand the urge to resurrect it. A500+ is a rare beastie. It's possible some of the tracks and components are in the same state as the Gary socket. But I hope not/
Hate to see such Amiga enthusiasm hit a wall.

Tell you what, if can’t get it working as a consolation I can send you a working Plain A500 with v5 Motherboard, For Free, postage only.

Don't give up on it.
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Old 06-16-2012, 04:11 PM   #18
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Default Re: My 500+ Project

Thanks mate, i really appreciate the offer
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Old 06-16-2012, 05:42 PM   #19
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Default Re: My 500+ Project

The A500+ are Rev8a motherboards if I remember correctly... different Agnus socket + pin arrangements compared to a normal A500.

I would just replace every green socket or surface soldered chip as possible. Resisters will be available from electronics places, IC's from a standard A500 should swap. Solder in your new sockets and jumper any corroded tracks if able. See if you can bring it back from the dead

Amiga's are much nicer with 2meg chip ram!

Az
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Old 06-16-2012, 06:13 PM   #20
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Default Re: My 500+ Project

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