Memory Chip Test Rig

Tool suggestions, soldering tips, general useful electronics knowhow.
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rubber_jonnie
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Memory Chip Test Rig

Post by rubber_jonnie » Wed Apr 25, 2018 11:04 pm

Speaking to Exxos the other day about a RAM issue, he suggested I remove one chip from a working bank, and fit a socket so I could test a chip at a time.

Whilst it was a fantastic idea, removing the RAM chips from the socket was a pain and risked breaking pins on the chips, so I wondered how I could speed things up.

Thinking about how I might speed things up and reduce the risk of pin breakage, three words came to me: Zero Insertion Force!!

With that in mind, I ordered a 16 pin DIP ZIF socket, and when it arrived, I set about building a rig that would allow me to plugh the ZIF socket into the socket on the board, and quickly and easily insert and remove RAM chips for testing.

Aside from the ZIF socket, I used a small piece of Veroboard and some header strips, which I usually have lying around spare.

Here are some pics of my creation:
tester1.jpg
tester1.jpg (296.35 KiB) Viewed 426 times
tester2.jpg
tester2.jpg (297.37 KiB) Viewed 426 times
And here it is installed in the mainboard. Makes removal of RAM chips super easy, and testing is quick, safe and easy :)
tester3.jpg
tester3.jpg (392.24 KiB) Viewed 426 times
Collector of old Atari things:
800XL + Ape Warp mod, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg) + Gotek, 1040STFM + Vortex ATOnce + Gotek, 1040STF long button floppy, 4160 STE with Gotek and ROM switcher, 4160STE with 32Mhz booster, ROM switcher and CosmosEx, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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exxos
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Re: Memory Chip Test Rig

Post by exxos » Wed Apr 25, 2018 11:09 pm

:dualthumbup: Geek points for you today!

Takes me like 10mins to get one chip into a socket, so a ZIF is a great idea!
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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rubber_jonnie
Posts: 435
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Re: Memory Chip Test Rig

Post by rubber_jonnie » Wed Apr 25, 2018 11:17 pm

exxos wrote:
Wed Apr 25, 2018 11:09 pm
:dualthumbup: Geek points for you today!

Takes me like 10mins to get one chip into a socket, so a ZIF is a great idea!
Ooooh, more geek points, ace :)
Collector of old Atari things:
800XL + Ape Warp mod, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg) + Gotek, 1040STFM + Vortex ATOnce + Gotek, 1040STF long button floppy, 4160 STE with Gotek and ROM switcher, 4160STE with 32Mhz booster, ROM switcher and CosmosEx, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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