Green Battery Question

[sbsgroup]

Can anyone tell me what is the minimum battery voltage for green battery in a s2000 machine.  I have one with the netplex error that is 2.6 volts.  That may be part of the problem.

[coorslight115]

Anything under 3.0 can cause problems, they are 3.6 volt new. Exact voltage where problems start in not a sure thing, but I would guess 2.8

[sbsgroup]

Thanks,  I need to find a replacement for the battery,  any suggestions, this is an enhanced game.  I am not a great solderer but possibly can get it done.

[bhinkley]

That green battery is a nicad battery.  That one recharges itself when the machine is on.  I have also determined it is not required.  If you de-solder the battery and solder a jumper wire between all 3 contacts it will run fine without that one.

[PWRSTROKE]

I am pretty sure that if you have a machine that has sat idle for a extended time or not used much that just turning the machine on and you may have to even unplug the speakers/sound (from error noise) the Green battery will recharge if it's ok.   This can be done usually overnight.  Then chk your voltage on that one---B.

[PWRSTROKE]

That green battery is a nicad battery.  That one recharges itself when the machine is on.  I have also determined it is not required.  If you de-solder the battery and solder a jumper wire between all 3 contacts it will run fine without that one.

The battery is required but with your technique it would work but info is not retained. It is there for a reason.  holds memory for vital op systems/memory. 

[bhinkley]

It actually is not.  I have been running mine fine without it for months turning off machine when not in use.  The lithium battery is what holds the settings.

[Foster]

The green battery has nothing to do with retaining the memory in a S2000 that is handled by the CMOS battery.
The green battery is used to power the tattle tale  circuits when machine power is off.
Tattle tale circuits monitor the door optics, BV door, and drop doors
I left out the cash can because that is detected by the BV and it would be off when power is off

 

[cowboygames]

Getting rid of the battery depends on the board. If it's an enhanced board the battery has to stay

[bhinkley]

It actually does not have to stay on the enhanced.  Foster is right about it monitoring door optics because when I say you have to jumper the 3 points with a wire, if you don't you will get door open errors, but when they are jumpered with no green battery at all on an enhanced board it works perfectly.

[cowboygames]

I know there's been talk about that mod for the 500 series boards, but I'd never heard of anyone having success removing the green battery on a 1270 board. Glad it works

[bhinkley]

Yeah.  I help out in a shop that restores and sells used slots and we have been testing and using that method on the enhanced board for a while now with great results.  Works great to prevent having the nicads fail and leak acid on the board to destroy it.  you can avoid the issue getting it off there before it fails.

[Neonkiss]

Yeah.  I help out in a shop that restores and sells used slots and we have been testing and using that method on the enhanced board for a while now with great results.  Works great to prevent having the nicads fail and leak acid on the board to destroy it.  you can avoid the issue getting it off there before it fails.

Can you please post pictures of your modification?

[PLUNGER BOY]

Let the SECRET OUT . Where do we add these jumpers . post pic or draw stick man pics . LOL

[bhinkley]

Here they are.  The first pic is of the complete board area with the actual board covering the battery when installed.  The second is with the upper board removed showing the full battery.  The third is with the battery removed and the wire jumpers in place.  The solder is not the best in the photo.  my iron seems to not be heating correctly right now, but it shows how to jumper it.

[bhinkley]

Here is the jumpered pic

[PLUNGER BOY]

If i am seeing this correctly you have soldered the - and the + together ?  P.B.

[bhinkley]

You are correct.  both + sides need to be soldered to the - side for it to get past the tell tale circuits.  You can also solder the whole copper pad on the + side and then just use one wire from + to - as well.  It just needs a good solid connection through the hole in the board on all 3 spots connecting to each other or you will still get the sensor errors.

[Neonkiss]

 
Knowing that the battery is a Nicad, that means it's rechargeable.
So when power is applied a low milli-amp current at 3V is applied back to the battery.
With the jumpers as pictured that would be a direct short.
Not sure how the long term affect would be?

[Foster]

I would feel safer putting a 150, 180 or 220 ohm resister between the + and - to protect the charging circuits and that allow 10mA to 20mA current flow depending on the actual voltage from the charging circuit.

[stayouttadabunker]

With the jumpers as pictured that would be a direct short.
Not sure how the long term affect would be?

My guess.... smoke effects?      

[bhinkley]

We have been monitoring the boards closely before saying it will work.  No overheating or adverse effects at all.  It appears the trickle charge does the same thing as what a dead (or fully charged battery) would do in that spot.  The power just passes through like it is not there.

[PLUNGER BOY]

With the jumpers as pictured that would be a direct short.
Not sure how the long term affect would be?

My guess.... smoke effects?      

Come on bunker you know your up for this. I may try this this weekend and will post results .      IF this Works as described Then a major karma storm should rain upon bhinkley

[cowboygames]

I like the idea, but what I'm wondering is if a guy could trace the circuit back and cut the charge circuit without adverse effects to the board? I'd try, but I don't currently have any games running enhanced boards

[stayouttadabunker]

"Enhanced boards" ?? Jeesh! What's that!!????   
I'm still running the the ol' 502's on my S2000 9liner setup! 
You guys are waayyy too advanced for me!