Turbo Duo - 5 volt rail short - FIXED!

Game-Tech.US · 01/24/2013, 10:35 AM

Came in with a blown fuse, now has a new fuse and all new caps, but still has a short to ground on the 5 volt rail of the inner regulator.
I wish I still had my thermal camera, might be easier to spot the issue.
Anyone have any ideas? My meter only has .1 Ohm resolution so looking for the least resistance to gnd is not really possible, i'll have to check my other meters and see what they are...
Part 1 LINK

Got a new thermal cam and found the short in seconds!
Part 2 LINK

NightWolve · 02/04/2013, 04:54 PM

Any luck with this yet, aka ?

Game-Tech.US · 02/04/2013, 05:07 PM

In the comments of the vid a guy recommended a crazy awesome kit called the 82b leakseeker!?!?
It looks amazing, but has been out of production for just over a year - CRAP!
None are for sale anywhere and the only other product I found that was similar was same price and not as awesome, there are also some that are way more expensive that do the same the thing.
I did get in contact with the maker of the leakseeker and they do plan to make a new one, but who knows how soon that will be. He said the old one was made from parts no longer available.
If I can't get a hold of one soon i'm gonna just look for a better resolution MM and go that route.

Game-Tech.US · 02/10/2013, 09:23 AM

I went ahead and ordered the ShortSniffer from http://www.testecvw.com. Just under $200...
Their website really put me off, looks like it hasn't been updated since 1998, but made the payment easily through the paypal link and got a ups tracker email within the hour!
It should be here Tuesday.
Will be posting video immediately whether it works or not.

turbokon · 02/10/2013, 09:35 AM

I ran into the same green substances before except it was on the underside if the pcb affecting the composite video signal.

Game-Tech.US · 02/13/2013, 08:51 AM

I got the shortsniffer in and have done a video on initial unboxing and testing.

Game-Tech.US · 03/23/2013, 04:03 PM

It's fixed, link to latest vid in first post.

NightWolve · 03/24/2013, 04:00 PM

Congrats! Cool toy, too. I thought that you received the Duo with this problem actually from the customer. I didn't know this was a result after you had done a capacitor replacement job on it. Anyway, yeah, thin soldering tip is always better. ;)

Nec.Game.head · 03/25/2013, 01:36 AM

Congrats on another successful Duo repair .. Keep up the great work dude !!!

PCEngineHell · 03/25/2013, 08:57 PM

Cool you got it fixed. I'm a bit overly cautious. After every few solder points I do I check the surrounding area with a magnifying glass to make sure I didn't have any solder blobs fall anywhere. That stuff can tend to sneak past you sometimes.

Game-Tech.US · 03/28/2013, 10:37 AM

Quote from: NightWolve on 03/24/2013, 04:00 PMCongrats! Cool toy, too. I thought that you received the Duo with this problem actually from the customer. I didn't know this was a result after you had done a capacitor replacement job on it. Anyway, yeah, thin soldering tip is always better. ;)

I don't think it was the tip size that caused it as i'm sure I was still using the weller at that point not the iron/tip I showed in the vid. The weller tip tended to accumulate solder and crap way way up on the tip and I prolly simply held it at a low enough angle for some to come off and bridge the cap.
Just one of those dumb things you have to learn the hard way!

Game-Tech.US · 03/28/2013, 10:38 AM

Quote from: PCEngineHell on 03/25/2013, 08:57 PMCool you got it fixed. I'm a bit overly cautious. After every few solder points I do I check the surrounding area with a magnifying glass to make sure I didn't have any solder blobs fall anywhere. That stuff can tend to sneak past you sometimes.

Dude... What's up with the insanely large signature pics?!?!

PCEngineHell · 03/28/2013, 05:41 PM

Quote from: akaviolence on 03/28/2013, 10:38 AM
Quote from: PCEngineHell on 03/25/2013, 08:57 PMCool you got it fixed. I'm a bit overly cautious. After every few solder points I do I check the surrounding area with a magnifying glass to make sure I didn't have any solder blobs fall anywhere. That stuff can tend to sneak past you sometimes.
Dude... What's up with the insanely large signature pics?!?!

Stardate Armageddon. It's a week long thing or something. It's like AA for drunks, but instead of AA its moral support for Neo-Geo.com forum members with big sigs who joined here and forgot to ditch the sigs.

Game-Tech.US · 03/30/2013, 06:42 PM

Quote from: PCEngineHell on 03/28/2013, 05:41 PM
Quote from: akaviolence on 03/28/2013, 10:38 AM
Quote from: PCEngineHell on 03/25/2013, 08:57 PMCool you got it fixed. I'm a bit overly cautious. After every few solder points I do I check the surrounding area with a magnifying glass to make sure I didn't have any solder blobs fall anywhere. That stuff can tend to sneak past you sometimes.
Dude... What's up with the insanely large signature pics?!?!
Stardate Armageddon. It's a week long thing or something. It's like AA for drunks, but instead of AA its moral support for Neo-Geo.com forum members with big sigs who joined here and forgot to ditch the sigs.

I see, i'm not really 'in the know' on that kind of stuff so thnx for explaining...

ApolloBoy · 03/30/2013, 07:52 PM

Quote from: akaviolence on 03/28/2013, 10:37 AMThe weller tip tended to accumulate solder and crap way way up on the tip and I prolly simply held it at a low enough angle for some to come off and bridge the cap.

I use the same Weller soldering station that you had and I've found that using it with a Hakko 599B really works wonders in keeping the tip clean. It's basically a container with a bunch of coiled brass threads and I haven't needed to use a sponge ever since.