Nintendo 3DS XL only works when the battery is not fully cha

[juanjo]

My nephew's Nintendo 3ds has this problem. One night he connected the
charger and the next morning the console was dead. No response
whatsoever, totally bricked.

Today I had time to try to repair the console and because the battery
self-discharge, today was working. I have charged the battery and
measured the voltage, when is over 3.8 volts the machine doesn't work.

I think that i will have to change the complete motherboard, but anyone
has a better idea?

 

[Sjouke Burry]

On 30.07.16 21:44, juanjo wrote:

My nephew's Nintendo 3ds has this problem. One night he connected the
charger and the next morning the console was dead. No response
whatsoever, totally bricked.

Today I had time to try to repair the console and because the battery
self-discharge, today was working. I have charged the battery and
measured the voltage, when is over 3.8 volts the machine doesn't work.

I think that i will have to change the complete motherboard, but anyone
has a better idea?

Get a charger that does not over-charge.

 

[juanjo]

El 31/07/16 a las 00:04, Sjouke Burry escribiĂł:

On 30.07.16 21:44, juanjo wrote:
My nephew's Nintendo 3ds has this problem. One night he connected the
charger and the next morning the console was dead. No response
whatsoever, totally bricked.

Today I had time to try to repair the console and because the battery
self-discharge, today was working. I have charged the battery and
measured the voltage, when is over 3.8 volts the machine doesn't work.

I think that i will have to change the complete motherboard, but anyone
has a better idea?

Get a charger that does not over-charge.

The battery at 3.8 volts is not over-charged, it is normal for a lithium
battery to go over 4 volts when fully carged

 

[Ian Field]

"juanjo" <juanjo@benages.eu> wrote in message
news:nnl2ac$62f$1@dont-email.me...

El 31/07/16 a las 00:04, Sjouke Burry escribiĂł:
On 30.07.16 21:44, juanjo wrote:
My nephew's Nintendo 3ds has this problem. One night he connected the
charger and the next morning the console was dead. No response
whatsoever, totally bricked.

Today I had time to try to repair the console and because the battery
self-discharge, today was working. I have charged the battery and
measured the voltage, when is over 3.8 volts the machine doesn't work.

I think that i will have to change the complete motherboard, but anyone
has a better idea?

Get a charger that does not over-charge.

The battery at 3.8 volts is not over-charged, it is normal for a lithium
battery to go over 4 volts when fully carged

Put a diode in series with the battery lead.

A regular silicon diode drops 0.7V, Shottky-barrier drops about half that.

You could even put a shorting switch across the diode so you can suck the
battery dry.

Its a bodge - but its cheaper than replacing the game.

Most current lithium cells must not exceed 4.2V, some older types must not
exceed 4.1V - a few modern types need 4.3V.

The exact right charging voltage for lithium cells is critical - they tend
to vent with flaming gas if overcharged!

 

[M Philbrook]

In article <nnj02g$fv0$1@dont-email.me>, juanjo@benages.eu says...

My nephew's Nintendo 3ds has this problem. One night he connected the
charger and the next morning the console was dead. No response
whatsoever, totally bricked.

Today I had time to try to repair the console and because the battery
self-discharge, today was working. I have charged the battery and
measured the voltage, when is over 3.8 volts the machine doesn't work.

I think that i will have to change the complete motherboard, but anyone
has a better idea?

you have a bad voltage regulator that passing through by the sounds of
it.
I bet you have a 3.3V chip set that has a LDO (Low drop out Reg)
running it.

If that not being the case, maybe a back flow DIODE is shorted and
allowiing that extra .5 volts or so to pass through. Those are use to
prevent drainage of the battery however, the machine should work with
the charger in it, if not, I'd go back looking for that regulator.


Jamie

 

[juanjo]

El 02/08/16 a las 00:04, M Philbrook escribió:

In article <nnj02g$fv0$1@dont-email.me>, juanjo@benages.eu says...

My nephew's Nintendo 3ds has this problem. One night he connected the
charger and the next morning the console was dead. No response
whatsoever, totally bricked.

Today I had time to try to repair the console and because the battery
self-discharge, today was working. I have charged the battery and
measured the voltage, when is over 3.8 volts the machine doesn't work.

I think that i will have to change the complete motherboard, but anyone
has a better idea?

you have a bad voltage regulator that passing through by the sounds of
it.
I bet you have a 3.3V chip set that has a LDO (Low drop out Reg)
running it.

Yes, I think thats the problem.
The console also shows that the battery is when in reality is half drained.
But in the end, the fastes and simplest solution is to change the main
board.

If that not being the case, maybe a back flow DIODE is shorted and
allowiing that extra .5 volts or so to pass through. Those are use to
prevent drainage of the battery however, the machine should work with
the charger in it, if not, I'd go back looking for that regulator.

The console doesn't work with the charger

Jamie

 

>"Put a diode in series with the battery lead. "

Can't do that because then it won't charge. Maybe with two, one in each direction but then it'll probably never fully charge.

 

[Ian Field]

<jurb6006@gmail.com> wrote in message
news:5da98753-3906-41a8-9433-42cad6a99d16@googlegroups.com...

"Put a diode in series with the battery lead. "

Can't do that because then it won't charge. Maybe with two, one in each
direction but then it'll probably never fully charge.

Its amazing how something as simple as using a diode as a gate confuses some
people.