Question on board battery connection for a Bally Pro

[ucanwin]

Question:
I have a 2 coin Bally Pro slot called California Dreamin'
Now......here's my problem. My battery went dead. I tried to unsolder the battery from the board. The small ring that the solder adheres to, came off of the board. Now........... I cannot see a trace on either side of the board that I can run a jumper to.   I do not have a schematic to see where the negative terminal of the battery can be bridged to. Can anybody help me out here??????      
The following is all of the info that I can find on the board to identify it:
1990, 1991, 1992, 1993 Bally Gaming
AS-3356-229 Rev. A
SMI 7017 EL CONG. SO. 54853 09-23-09 Bally
P-9018-201
M-2045-201

[Mr. Dinoman]

It is a 5000, 5500 or a 6000 Pro-slot?....Post some photo's of the MPU board....

[a69mopar]

Yes,  pictures would be best.  sounds like an S5500  . Boards are like a sandwich, sometimes there are traces between the layers.

W

[a69mopar]

I believe it goes to chassis ground, which if I recall is also at each screw point.
w

[ucanwin]

Thank you all, for the replies. Here is a picture of the board, if it helps.

[Mr. Dinoman]

You have a Bally 5500 pro-slot...the battery hooks up are negative side of battery to any ground on the board -  Positive side goes directly to the jumper JW12 (the other side of JW is connected to R61, R49 and R26
You can use any re-chargeable 3.6v  that is 800mah or over...
Jimmy

[Jim]

I agree with the connections being made as stated.

I DISAGREE with the type of battery you are recommending, all the Bally pro slot boards I have worked on used the same type as the IGT.  A 3.6 volt lithium battery 950mah. which is a NON- recharging type battery.  that is why the Bally machines have to have them replaced every 1-2 years without fail. If you want them to last longer in a Bally machine you should undo that jumper and take the battery out of the circuit, I've never done that myself,so I don't know if you would have to clear the machine once you hook it back up.



Jim

[ucanwin]

I have had this problem for awhile now. I tried running a jumper to another ground on the board, and the game worked as normal, but for some reason, two batteries got drained. They are rather expensive, so I don't want to have that happen again. Could it be a solder connection that isn't quite good enough that would cause the battery to drain?
I am using the 3.6 V Lithium type battery.

[Mr. Dinoman]

Jim check the wiring schematics...Shows a charging circuit and the battery to be 800mah...

[Jim]

Jim,

not trying to     every Bally pro slot  machine that I have ever worked  had a lithium non rechargeable battery soldered onto the logic board.  these were factory installed, not replacements.

I do not have any wiring diagrams or schematics for this machine. I am just speaking from what I have encountered along the way.

Thanks

Jim

 

[Mr. Dinoman]

Here is the battery wiring...Most people put in Lithium battery without a blocking diode and that cause the battery to drain faster then normal...If you are going to use a re-chargeable battery, then use a Lithium-ion battery...

[ucanwin]

I am by no means knowledgeable about electronics, but I want to be sure that if I used a Lithium-ion battery on this board, that it will not cause any damage. Wouldn't use of a rechargeable battery used on a board that would normally use a nonchargeable battery possibly cause battery leakage or fire hazard? I see the battery on the schematic, but not really understanding schematics, I can't tell if it is rechargeable or not. Sorry, but you are dealing with a dummy when it comes to electronics. Thanks to all for your input, but I am still confused as to which is correct. As far as I know, the boards on my Bally machines have Lithium batteries in them. One has not been a problem with the need for frequent battery replacement, the other has needed two batteries in about 3 months and now, needs another. I have just replaced the board with another that I just put a new battery in. I am going to keep an eye on it to see if the voltage drops.

[Mr. Dinoman]

Here is a good post to read...Search for "MPU Battery Changes"...I am not sure how to post the link to the thread
Jimmy

[ukulele]

I have a thought about the battery  situation rechargeable or lithium. Forgive me if it is incorrect as I am still new and have not really touched my pile of E-2000's.

My electronics backround is from High School so it was a long time ago as I'm retired now.

Some postings say to use lithium batteries while others say that isn't a solution. This is due to the recharging circuit. In addition, I have seen different ways members wire battery holders into the circuit board but believe they are using lithium.

Why not use a small relay to work both types of batteries. The charging circuit would keep the relay closed while the machine is turned on and continue charging as normal. If the power was turned off  the relay would switch and connect to your battery holder(nonchargeable).  Maybe a member with electrical backround could comment. It is just a thought.

Regards,

Philip