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-   -   My 500+ Project (http://www.amiga.org/forums/showthread.php?t=61890)

djos 06-15-2012 07:45 PM

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. :nervous: :eek:

AmmoJammo 06-15-2012 08:03 PM

Re: My 500+ Project
 
*runs away and hides*

djos 06-15-2012 08:08 PM

Re: My 500+ Project
 
Quote:

Originally Posted by AmmoJammo (Post 696534)
*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)

Azryl 06-15-2012 09:32 PM

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

Az

djos 06-15-2012 09:49 PM

Re: My 500+ Project
 
Quote:

Originally Posted by Azryl (Post 696537)
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

AmmoJammo 06-15-2012 10:14 PM

Re: My 500+ Project
 
did you buy this as "working"?

djos 06-15-2012 10:19 PM

Re: My 500+ Project
 
Quote:

Originally Posted by AmmoJammo (Post 696542)
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:

AmmoJammo 06-15-2012 10:26 PM

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 :p

djos 06-15-2012 10:30 PM

Re: My 500+ Project
 
Quote:

Originally Posted by AmmoJammo (Post 696546)
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. :D

Lurch 06-16-2012 12:35 AM

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 ;-)

djos 06-16-2012 12:40 AM

Re: My 500+ Project
 
Quote:

Originally Posted by Lurch (Post 696552)
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 06-16-2012 01:35 AM

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.

AmmoJammo 06-16-2012 02:03 AM

Re: My 500+ Project
 
Buy two 24 pin sockets from jaycar for 60 cents each ;)

djos 06-16-2012 02:10 AM

Re: My 500+ Project
 
Quote:

Originally Posted by AmmoJammo (Post 696557)
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. :)

MelbourneBen 06-16-2012 02:17 AM

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.

djos 06-16-2012 02:59 AM

Re: My 500+ Project
 
Shipping was 50 but I don't regret it. :)

gertsy 06-16-2012 10:12 AM

Re: My 500+ Project
 
Quote:

Originally Posted by djos (Post 696563)
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.

djos 06-16-2012 04:11 PM

Re: My 500+ Project
 
Thanks mate, i really appreciate the offer :)

Azryl 06-16-2012 05:42 PM

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

djos 06-16-2012 06:13 PM

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


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