Author Topic: SOLVED! - Turbo Duo - Full recapcand still have some sound issues  (Read 692 times)

thesteve

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when +/- are the same the amp floats, output could be anything

grendelrt

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Did  you happen to know what feeds pin 5 an 6 on that ic? There is a chip in the way on the bottom of the board that blocks the view,  trying to avoid bending it.

grendelrt

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I resoldered the caps near IC107  ( thanks Keith!) and the voltage did drop a tiny bit, it went from
IC 107 Beside cd rom area
1- 9.36
7- 9.9
8- 9.9

to

IC 107 Beside cd rom area
1- 9.5
5 - 5
6 - 5
7- 7.5
8- 10

I tried tracing the path from the legs on the bottom of the board, i moved that chip that was blocking but didnt want to pull it up too much. I lost the traces though.
Pin 6 on IC 107 4558 - Bottom of board R134 to R140, then I couldnt find where it went next. '
Pin 7 on IC 107 4558 - Bottom of board R145 to R144 to solder joint that splits to R142 and R143.

Took some pics if it helps



This one looks really cool too ha!


grendelrt

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Re: Turbo Duo - Full recapcand still have some sound issues
« Reply #18 on: May 12, 2015, 08:49:33 AM »
SUCCESS! The via near the IC521 was bad! Wooo, finally ahha. Voltages at 521 went back to normal with a quick patch wire to ground.


Sound is good, and since the recap I think my video quality went up a little bit. Another duo is still alive, hanks for all the help! =)

thesteve

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Re: SOLVED! - Turbo Duo - Full recapcand still have some sound issues
« Reply #19 on: May 12, 2015, 12:36:37 PM »
as i said bad ground

grendelrt

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Re: SOLVED! - Turbo Duo - Full recapcand still have some sound issues
« Reply #20 on: May 12, 2015, 12:46:26 PM »
as i said bad ground
Yeah it was just finding it! thanks for the help =)