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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: kormendi on April 05, 2014, 01:39:51 AM
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I've been working on resurrecting a TG CD for the last few months now. It had been flashing "PC" on the LEDs and making gear noises, so I replaced all the caps. After that didn't work, I bought some new gears and I installed those yesterday. The same behavior, but after adjusting pots for a few minutes, I started noticing a burning smell. I looked around on the board, nothing felt hot, so I kept at it. At one point I was even able to get a game to load.
Eventually though, it wouldn't power on at all and I finally noticed a burnt via (circled in red). The picture is from a different board; that's why it doesn't look burned.
(http://i.imgur.com/i67XXNO.jpg)
There is no longer continuity through the via, so a I'm considering bypassing it with a wire as drawn in blue. My concern though is that another component will pop since I've not addressed the original cause.
I should add that if I attach headphones and a supply directly to the unit, it still works great as a standalone CD player.
Any ideas?
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When using it standalone that connector is unused, there are few components between DC plug and CD-ROM connector, a diod only to be exact.
Take a look at this page:
http://www.pcenginefx.com/forums/index.php?topic=16332.0
So it should be pretty safe to just make a small cable where you painted the blue line, otherwise it should make as much damage when you used the DC plug.
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Yes, do it like I did it in the mentioned picture with the blue line.
Works for me without issues since then.
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may have just been a bad via
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That was it. It seems to work flawlessly now. Thanks.