29 September 2009, 00:26 | #21 |
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That wire's not gonna break!
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29 September 2009, 00:34 | #22 |
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hehe, hope not...
cost a lot of manhours that little piece of wire, i was getting ready to give up on fixing it. |
29 September 2009, 00:40 | #23 |
Ya' like it Retr0?
Join Date: Jul 2005
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Well done Kipps!!!
I wonder what it was that ate the copper track away..... I have not known mono-caps to damage a board like that.... |
29 September 2009, 00:44 | #24 | ||
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Quote:
Quote:
I know *nothing* about the A600 keyboard, but based on the schematic, I'd say that's a reasonable educated guess (the lines to the NOR gate being the CTRL/A/A lines from the keyboard). Apparently those keys have their very own switches outside of the regular matrix on the A600. Glad to see that you found the problem, after you went ahead and replaced those IC's there's little else it could have been aside from Q622 or a bad trace. Too bad you had to do all that work before finding it. Edit: Looks like something ate away at the copper under the solder mask. I doubt that the board would have passed Q.A. at Commodore if it had come like that from the board house. I have, however, seen some terrible PCB's come out of some of the cheaper manufacturers, where it looked like someone splashed developer on the boards during the board's manufacturing. Unfortunately, we didn't spot the 3 boards with this problem until *after* they already had been populated, and failed testing. Lots of kynar jumpering and XACTO work to fix . Hope you saved the old IC's, seeing as they are probably all good. Last edited by Shadowfire; 29 September 2009 at 00:57. |
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29 September 2009, 13:02 | #25 |
The 1 who ribbits
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another problem solved |
02 May 2024, 05:17 | #26 | |
HARDGB
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