My 500+ Project

[djos]

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.

[Azryl]

When you have this A500+ working again, you will find very little speed increase with the 68010 at standard clocks + no cache

you need to find one of these! http://amiga.resource.cx/exp/adspeed

I have one in a box somewhere

oh, I also have one of these! http://amiga.resource.cx/exp/mtec520i
(installed in my a2000 atm with budha card+ 4gig HD, cdrom, amber flicker fixer and a picasso II )

and one of these http://amiga.resource.cx/exp/blizzard500

and 2x of these as well http://amiga.resource.cx/exp/supra28

finally one of these http://amiga.resource.cx/exp/pamc500
(installed in another a2000 with gvp8+ 2gig scsi + cdrom)

yeah, I have too much stuff... some in boxes never installed

ah well.... Amiga is addictive!

Az

[djos]

LOL, very nice - I mainly got the 68010 so that I can switch back to workbench from WHDLoad installed games.

Im going to order the latest Gen 68kIDE adaptor with CF module, 8MB Processor Ram module and 1MB Chip Ram board as soon as I've resurrected my 500+ - that'll give me 10MB Ram total and a 4GB CF HDD. :cool:

[djos]

Some goodies arrived in the mail today from AmigaKit:

Miggy PSU, cr2032 lithium battery kit, 2nd Comp Pro Joystick, RGB-SCART Cable, Miggy-VGA Adaptor

and my 68010 also arrived, just need to finish restoring my 500+ now (hopefully i'll get a chance tonight)!

[Azryl]

Keep up the good work!

Hope we hear a success story soon

Az

[djos]

Managed to finish removing the corroded socket and install the replacement tonight but still have some work to do before my 500+ is fully working.

I reckon I need some finer grit sandpaper than I have to clean the feet on the Gary chip as I put it in and powered it up (just composite for now) and All I got was a flashing screen and an occasionally flashing Power Light (sort of dims to flash).

anyway here's some pics so far:

Lid on:
http://dl.dropbox.com/u/71121999/Amiga/2012-06-17%2018.18.32.jpg

Half the socket gone, board mostly cleaned:
http://dl.dropbox.com/u/71121999/Amiga/2012-06-20%2018.55.41.jpg

New Socket install (2x 24pin):
http://dl.dropbox.com/u/71121999/Amiga/2012-06-20%2020.55.19.jpg

Gary Chip in socket to make sure it fits + battery area and for a quick but so far unsuccessful test:
http://dl.dropbox.com/u/71121999/Amiga/2012-06-20%2020.57.44.jpg

One thing that does concern me is I popped a trace on the bottom of the mobo where it connects to a Gary socket pin and it pulled several centimetres off the board - I was able to solder it directly to the pin and gave it a coating of nail polish but am still unsure if that is enuf (time will tell i guess - might put up a pic tomorrow night).

I also tested all the socket pins with my multimeter to makes sure none of them where accidentally connected and got perfect results first time so happy with that.

If I cant fix this board I have discovered that getting hold of a Rev6a board is quite cheap from Europe and I should be able to transplant all the ECS chips and half the ram. :cool:

[AmmoJammo]

tin the pins on the IC to clean them

don't put massive blobs of solder on them though :p

[djos]

Good idea, I'll try that.

Btw when looking at the pics can your trained eye see any pcb damage I need to repair?

[djos]

Btw, I quickly took some pics of my socket soldering work (bit amateur - been a long while & I miss having a proper desoldeing station) and the trace I had to repair:

http://dl.dropbox.com/u/71121999/Amiga/2012-06-21%2007.59.53.jpg
http://dl.dropbox.com/u/71121999/Amiga/2012-06-21%2007.58.45.jpg

[Azryl]

That lifted trace, you might want to see where it starts and solder a wire link from source to socket pin.

Insert Gary and see if the machine boots. The trace might look solid and connected along its length but more than likely there is a break in it.

Az

[djos]

That lifted trace, you might want to see where it starts and solder a wire link from source to socket pin.

Insert Gary and see if the machine boots. The trace might look solid and connected along its length but more than likely there is a break in it.

Az

Good idea, thankfully I have some fine stiff wire lying around from a c64 reset switch mod. ATM I don't even get the insert disk screen likely due to the Gary chip feet needing more of a clean than I've given them.

[AmmoJammo]

Btw when looking at the pics can your trained eye see any pcb damage I need to repair?

its too hard to tell in the pics.

a lot of the tracks look discoloured, it could just be the coating on the board, or it could be the track under the coating...

[MelbourneBen]

LOL, very nice - I mainly got the 68010 so that I can switch back to workbench from WHDLoad installed games.

Im going to order the latest Gen 68kIDE adaptor with CF module, 8MB Processor Ram module and 1MB Chip Ram board as soon as I've resurrected my 500+ - that'll give me 10MB Ram total and a 4GB CF HDD. :cool:

Hi Mate, where are you going to order the 68kIDE adaptor from? As these still available new? Or are you hoping to get one second hand?

[djos]

Hi Mate, where are you going to order the 68kIDE adaptor from? As these still available new? Or are you hoping to get one second hand?

MKL (aka mika) on amibay makes and sells the very latest version for about 50 Euros. :cool:

[djos]

So I took another crack at reviving my 500+ board last night:

I replaced the faulty trace with a direct wire connection:
http://dl.dropbox.com/u/71121999/Amiga/Photo%2021-06-12%207%2042%2033%20PM%20(HDR).jpg

I also tinned the feet of the Gary chip and tested a bunch of traces around the battery area with my multi-meter to ensure they weren't broken (none were) and then fired up my 500+.....

and got this: http://dl.dropbox.com/u/71121999/Amiga/Video%2021-06-12%208%2003%2052%20PM.mov

:cry:

It doesnt even attempt to boot from a floppy either so Im calling this mobo BUSTED! Oh well, it's been fun trying to repair it as I havent done any board level repair work sine about 1998!! gave me a good excuse to buy a new soldering iron too. :cool:

Anyway, all is not lost, I ordered a tested and working Rev6a Mobo from germany and will swap all the ECS chips onto it and upgrade the on board ram to 1MB using the chips from my Rev8a so it''l pretty much be a 500+ regradless.

[AmmoJammo]

you made an 8 second video thats 20 megs?!?!