Repairing an Applied Engineering Z-RAM Ultra 2 for the Apple //c Computer (Part 1)
Today I have a big challenge on the bench: a destroyed Applied Engineering Z-RAM Ultra 2 card for the Apple //c computer.
This card is a combination of clock card and RAM card for the Apple ][c, with built in battery backup. But someone forgot to get the darn battery out, it exploded and destroyed the board. Oh noes!
Hang out with me today while I tear down this board, clean and repair it, then build it back up. Will it work?
Introduction: 00:00
What is it? 00:24
See the Destruction! 01:21
Repair Plan: 02:45
Preliminary Cleaning: 06:11
Depopulating the Board: 10:32
Neutralizing the Nasty: 12:22
Repairs! 15:22
Repairs Done? 16:22
How to fix a pulled trace: 19:38
Testing the 74LS173: 21:11
Finally! Does it work? 22:40
Outro: 24:28
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