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Old 06-16-2012, 02:59 AM   #16
djos
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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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Old 06-16-2012, 07:59 PM   #21
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Default Re: My 500+ Project

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.
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Old 06-16-2012, 08:45 PM   #22
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Default Re: My 500+ Project

If you lift any of the green protective paint off the copper tracks with your alcohol, go buy some cheap girly nail polish, a bright colour!

This can be painted over any exposed areas of the motherboard/copper you need to repair, works well.

Also, if you have small sections of track that are suspect or badly corroded, buy a rear window demister repair kit from a local car spare parts/autobarn/repco. The silver conductive paint can be used to redo the damaged tracks for short distances. Wait until dry then cover with nail polish

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Old 06-16-2012, 08:58 PM   #23
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Default Re: My 500+ Project

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.
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Old 06-17-2012, 04:28 PM   #24
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Default Re: My 500+ Project

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!
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Last edited by djos; 06-17-2012 at 04:37 PM..
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Old 06-17-2012, 06:48 PM   #25
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Default Re: My 500+ Project

Quote:
Originally Posted by djos View Post
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!
Good to hear!
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Old 06-17-2012, 06:52 PM   #26
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Default Re: My 500+ Project

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Good to hear!
Indeed, just need to finish replacing the socket and plug her in when my new PSU shows up. *fingers Crossed*
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Old 06-17-2012, 06:54 PM   #27
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Default Re: My 500+ Project

pics? :P
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Old 06-17-2012, 07:07 PM   #28
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Default Re: My 500+ Project

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pics? :P
Will try and take some tonight, wife was giving me the hurry up.
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Old 06-17-2012, 08:55 PM   #29
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Default Re: My 500+ Project

Awesome! Good to hear about the tracks after the clean up... replacing sockets is a pain, make sure you do not make any solder bridges on the legs. Check with a magnifying glass if you have one.

Hope Gary works for you.

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Old 06-17-2012, 09:03 PM   #30
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Default Re: My 500+ Project

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Awesome! Good to hear about the tracks after the clean up... replacing sockets is a pain, make sure you do not make any solder bridges on the legs. Check with a magnifying glass if you have one.

Hope Gary works for you.

Az
Thanks, yeah removing a Socket is really hard, I wish I had a nice Weller Soldering/de-soldering station like back in my techo days as solder suckers are close to useless and de-soldering braid can be tricky to use on such small holes.

I do all this sort of work with a mag-glass mounted on my little small-pcb holding stand thingo.
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