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Home Forums 68kMLA Color Classic no power issue debunked! — #19
Post #19 by mraroid
Source Forum68kMLA
CategoryHardware
Post DateSat, 13 Jun 2015 - 21:27
Original URLhttps://68kmla.org/bb/threads/color-classic-no-power-issue-debunked.1285/
Post
I recently got around to looking at a CC I got last year that needed a recap. I removed all the capacitors and noticed a lot of leakage around them, so I painstakingly removed nearby chips, cleaned underneath, and checked all nearby vias to make sure all the pads and vias were still good and connected. To check the vias, I simply checked continuity between the components on each side of the board that were connected through the via.

Sure enough, the only via I found that was broken was the same one from techknight's diagram above. Nice work uniserver and techknight! Here is a closer picture:

attachicon.gif
BrokenVia.jpg

As you can see, that via is about as close as you can get to a capacitor, so it's not surprising that it rots out. Here's the fix I did on the bottom of the board:

attachicon.gif
BrokenViaPatch.jpg

I just completed the recap and fix this evening, and now the Color Classic is up and running!
The Y2 component (it is a crystal, right?) fell off my Color Classic board some time with in the last 5 years and is now lost.  I would like to buy one.  Anyone know where I can get one (new or used)  I know how to solder.  Thanks  

jack

mp.ls