Tron Smoke test roasted these parts?? (Need to identify)

dethfactor

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Tron Smoke test roasted these parts!! (Need help identifying)

I picked up a tron last weekend and the smoke test did indeed bring smoke. I've been rebuilding her psu but the main board got cooked a bit. Is it even worth trying to restore the board and if so, can someone identify what I need to replace and where's a good place where I don't need to order 4000 things to justify the $15 shipping?

06d4e34a.jpg


In the schematics the large green resistors (not sure) are described as IOUH Molded. Googled it to no avail. Also it melted off a few accompanying what I can assume is diodes at C131-C134 but Im not exactly sure what these are.

Thanks!
-M
 
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Looks like all you blew was the 10 uH coil and the smoke residue just covered the two .01 caps. can't read the schematic well enough to determine what signal goes across that, but it would be my guess that something was plugged in 1 pin off or something.

I would clean up the dirty area with alcohol, and replace the coil. Doesn't look to bad.

Hopefully the more Tron oriented repair people will chime in.
 
I have few of those inductors I've taken from bad boards, PM me and I'll send you one. To make sure it will not smoke again put your meter across pins 1 & 11 of J2, if you have a short more than likely you have a bad Tantalum Cap on the 12v line in the audio circuit on the SSIO. I don't have a cap tester so I lifted one end of each cap till I found the bad one. Of course it could be something else too, also like Talon said you may have put one of the ribbon connectors on 1 pin off.
Rich H
 
They're inductors on the power lines... you can safely just pull and jumper over them. Chances are you've got a power-ground short through one of the black tantalum bullet caps.

Pull the ribbon cables, as you may have smoked one of them...
 
I have few of those inductors I've taken from bad boards, PM me and I'll send you one. To make sure it will not smoke again put your meter across pins 1 & 11 of J2, if you have a short more than likely you have a bad Tantalum Cap on the 12v line in the audio circuit on the SSIO. I don't have a cap tester so I lifted one end of each cap till I found the bad one. Of course it could be something else too, also like Talon said you may have put one of the ribbon connectors on 1 pin off.
Rich H

Great! Thanks! Also what are the 'diode' looking things that run along with the inductors? They're roasted and literally burned off on C131-C134.
 
Didn't notice those before. Doesn't look like they were there to begin with. If they had blown there would be indications. Perhaps they are on the backside? Does it appear the leads have been cut at some point? they don't need to be in there to work, they are decoupling caps.. Helps keep transients out. They are just .01 50v glass caps I believe.
 
Hmm.. Good point. It looks like either they were cut or on the backside. I just saw the ends of leads and thought they might've gotten roasted off in the process. I'll check the back of the board tonight. Thanks for the 411

Didn't notice those before. Doesn't look like they were there to begin with. If they had blown there would be indications. Perhaps they are on the backside? Does it appear the leads have been cut at some point? they don't need to be in there to work, they are decoupling caps.. Helps keep transients out. They are just .01 50v glass caps I believe.
 
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