Thread: My 500+ Project
View Single Post
Old 06-20-2012, 06:54 AM   #35
djos
Cult Member
Points: 5,394, Level: 47 Points: 5,394, Level: 47 Points: 5,394, Level: 47
Activity: 2% Activity: 2% Activity: 2%
 
djos's Avatar
 
Join Date: Jun 2012
Location: Melbourne, Australia
Posts: 928
Default Re: My 500+ Project

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/Ami...2018.18.32.jpg

Half the socket gone, board mostly cleaned:
http://dl.dropbox.com/u/71121999/Ami...2018.55.41.jpg

New Socket install (2x 24pin):
http://dl.dropbox.com/u/71121999/Ami...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/Ami...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.
__________________
Amiga 1200 w/ KS1.3, ACA1220 16Mhz 128MB w/ RTC, 4GB CF-HDD, a1011 External FDD
Amiga 500 w/ KS1.3, 512k Chip-Ram, 512k Slow-Ram, 4MB Fast-Ram, FDD Boot Selector, HxC RevC SD Floppy Drive, a1010 External FDD
Commodore 64 w/ 1541 Ultimate-II inc Tape Adapter, JiffyDOS, 1541 Disk Drive, 1531 Datasette, C64 Flyer Net Modem, ZoomFloppy
djos is offline   Reply With Quote