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#1
vb burn out
Posted on: 9/5 5:09
VB Gamer
Joined 9/5
10 Posts
Hello guys

Iím new VB owner
And I fried iit
It started smelling like burn plastic no smoke although
Thatís the short story

The long story is
I got VB that was having a bad contact with ac adapter and the tap
I realize this bad contact wheI slightly plug the ac adapter from the input so,it work for a while
I also tried the tap in another vb and didnít work
So I follow this guide https://gbatemp.net/threads/tutorial-v ... ut-ac-adapter-set.465122/
Alll the steps
And you guess it when press power ,it starting to smell burn
So my question is do the whole motherboard burn out? If so how can I check this?
Or just the voltage regulator
I also believe the controller burn out

Thanks in advance for any input
Btw, if this canít be salvage at least it could serve as a warning
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#2
Re: vb burn out
Posted on: 9/5 7:17
PVB Elite
Joined 2013/6/17
Canada
1168 Posts
Top10 Poster10+ Game RatingsLong Time User (6 Years)
Well that's an awesome article to be out there. The answer to the question of "what you should do if you don't have a tap" is buy an adapter tap. They are not that hard to find for a reasonable cost.

Anyway, You may be able to replace individual parts if you can determine what exactly you fried. If you can't figure it out then get another motherboard if you can find one for a good price. And a controller. Or a banged up parts VB.
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#3
Re: vb burn out
Posted on: 9/12 7:59
VB Gamer
Joined 9/5
10 Posts
So I took out this circuit
It burn out
Could you please advise whatís for and which is the replacement ?

Attach file:



png  687C0D27-9B38-4C96-8AFD-A3E317E6E47C.png (5,629.99 KB)
15249_5d79de6b940a9.png 1536X2048 px
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#4
Re: vb burn out
Posted on: 9/12 16:52
PVB Elite
Joined 2013/6/17
Canada
1168 Posts
Top10 Poster10+ Game RatingsLong Time User (6 Years)
Really hard to tell in that picture as its dark but the circled thing looks like an SMD fuse. If you could get a better picture that'd be great. If it is indeed a fuse we'll need to get an amp rating.
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#5
Re: vb burn out
Posted on: 9/13 0:39
Nintendoid!
Joined 2017/10/29
USA
106 Posts
Long Time User (2 Years)
likly burned out the voltage regulator but im not completely sure either. personally id mod it run off usb. i thin kthe console runs off 5v
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#6
Re: vb burn out
Posted on: 9/13 3:23
Nintendoid!
Joined 2012/10/16
206 Posts
Long Time User (7 Years)
I did something similar to mine when doing my snes controller mod. I'd recommend just buying a unit only one and replace the board. The method listed below is a bitch.

http://notinmame.blogspot.com/2013/10/virtual-boy.html?m=1
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#7
Re: vb burn out
Posted on: 9/13 4:40
PVB Elite
Joined 2013/6/17
Canada
1168 Posts
Top10 Poster10+ Game RatingsLong Time User (6 Years)
I need to take apart a VB anyway to document/fix the displays so I'll see if I can find that little board cause I really can't tell what's going on in that picture, lol.
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#8
Re: vb burn out
Posted on: 9/13 17:14
VB Gamer
Joined 9/5
10 Posts
So I took a better picture and the voltage regulator U8 in motherboard slot
Was burn out.
Should I buy a new one if so what's the model number?
If not, what's the alternative
Thanks

Attach file:



jpg  IMG_20190913_085839.jpg (663.65 KB)
15249_5d7bb248d2258.jpg 4000X3000 px
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#9
Re: vb burn out
Posted on: 9/13 20:45
PVB Elite
Joined 2013/6/17
Canada
1168 Posts
Top10 Poster10+ Game RatingsLong Time User (6 Years)
I found this old post from someone else with a faulty regulator board.
https://www.newark.com/nxp/nx1117c50z- ... v-1a-sot-223-4/dp/66W5705


DogP has a very insightful post in here:
"FYI, the regulator isn't a standard part... it's a custom switching regulator board that Nintendo made. If you're good with electronics, you should be able to replace it with a standard 5V regulator, like a 7805, though I'd recommend using a 9V AC adapter with that kind of regulator, because it brings the voltage down to 5V by wasting the extra power as heat.

This will kill batteries faster, and a 7805 will typically stop regulating at ~7V, so it won't be able to suck the last of the batteries dry. Also, it'll get really hot if you use too high voltage of an AC adapter (like 12V or more).

If you have a good electronics store, you could pick up a LDO regulator, like the LM1086, which would regulate with a lower input voltage (probably down below 6V), so you could use a 6V adapter, which would reduce the amount of heat.

I don't know if the original caps on the motherboard are sufficient/compatible for linear regulators, so you may need to install two caps with the regulator (look at the datasheet).

Anyway, the pinout of the Nintendo regulator is:

1-Vin
2-GND
3-PowerGood
4-missing
5-Vout
6-GND

You may be able to tie PowerGood to 5V (Vout), though it may need a delay, since the purpose of it is to hold the system in reset until the power is stable.

You should also verify that the regulator is actually bad... measure the voltage at Vin with the controller on... it should be the same voltage as coming out of the controller. Then measure the voltage of Vout... it should be 5V, if it's not, your regulator is probably bad, or something is shorted on the board and overloading the regulator. There should also be a small red LED lit on the regulator when it's on.

DogP"
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#10
Re: vb burn out
Posted on: 9/13 21:59
Nintendoid!
Joined 2017/10/29
USA
106 Posts
Long Time User (2 Years)
i still say be experimental :P wire it up directly to 5v usb power. i did it for the nes and it worked great :P
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