S+ 10 mhz board issue/battery

[mrv8outboard]

My Double Wild Cherry S+ is killing the board battery every couple of weeks. I think the CMOS chip might be bad. Do I try and swap out the chip or replace the board.

[Shaggy]

http://newlifegames.com/nlg/index.php?topic=2026.msg10388#msg10388

Here is a link to a similar question. Don't know if this fits but.. maybe you're buying old batteries or you maybe do have a bad board.

Dave

[mrv8outboard]

I have checked the batteries during install and were great. I found other posts but did not come across that one. I had just pull the board for inspection and noticed that cap must be leaking as there was some oxidation on it's legs. Cleaned it with alcohol and reseated the CMOS chip. Did not replace or check the battery (because I plan to change it out). Put the board back in, 61, 61-1, reset, and it is good. So I will find a supply of caps and another battery and service the board. Once I do I will have to wait and see. Thank you for the guidance.

[jay]

You might check fleabay or one of the sellers on our banner page.
I have seen S+ boards go for as little as $20.00
Might be cheaper than replacing a bunch of caps.
Good luck.

[rokgpsman]

My Double Wild Cherry S+ is killing the board battery every couple of weeks. I think the CMOS chip might be bad. Do I try and swap out the chip or replace the board.

Can you show a photo of the mpu board cmos chip? I think those memory chips can be bought for a pretty low cost. Since it is in a socket you could simply replace the cmos chip and have a good chance of fixing the problem. That would be cheaper than replacing the board and seems like it would be worth a try.

To prove if it is the cmos chip that is draining your battery you could remove the cmos chip from the board, install a new battery and then wait for a week or so without using the machine to see if the battery dies or not. If the battery voltage stays good then the problem has a good chance of being the cmos chip. But with the cost of a replacement battery being higher than the cmos chip it might just be better to replace the cmos chip and see if that fixes it.

The cmos memory chips are available from several sources like ebay and electronics suppliers. Here is an example, would need to see the markings on your cmos chip to know for sure:

http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_42884_-1

[mrv8outboard]

Looking at what I cleaned off it could have been moisture that had gotten in there before I owned it? It is still up and running on the old battery today. So I may wait and see before I act. Here are the photo's I took last night.

[rokgpsman]

yes, contamination and residue on a board like that are often conductive and can provide a way for the battery voltage to be drained away. You will need to clean it thoroughly, that stuff could be underneath the socket, hopefully that fixes the problem. Is that from water/liquid that somehow spilled on the board, wouldn't think it was from battery leakage since the battery is so far away from the cmos. Is your machine a slant top? They get drinks spilled in them sometimes.

Also, it is a little fuzzy in your photo but it looks like the cmos marking is for a 6264 type 8Kx8 memory chip, 100 nsec speed. So that link I posted above for a replacement chip would be like what you need if you decide to replace the chip. But maybe that won't be needed since you found the stuff on the board.

I think you've found your problem, good job!   

[therockinelvis]

 

I had a board doing the same thing. Replaced cmos chip with a different one and battery has been good over a year now.

[mrv8outboard]

  So I have an update. I replaced the CMOS chip with a new one. I also replaced the Capacitor. Installed a new battery. The machine functioned fine. Left it unplugged and the battery was fine (had done this many times since repair). I had a bunch of credits stored on the machine, unplugged it and got a code 12 after a few days when plugged back in.
Maybe just find a good replacement board or is it only because I left credits and unplugged? Let me know what you think. Thank you.

[Shaggy]

  So I have an update. I replaced the CMOS chip with a new one. I also replaced the Capacitor. Installed a new battery. The machine functioned fine. Left it unplugged and the battery was fine (had done this many times since repair). I had a bunch of credits stored on the machine, unplugged it and got a code 12 after a few days when plugged back in.
Maybe just find a good replacement board or is it only because I left credits and unplugged? Let me know what you think. Thank you.

Dude if it was mine, I'd put a board in. They're still cheap enough to get and stop the hassle. You can mess around spend money and may still end up here. I'm just saying, if it was mine, get a new board. I hate having a good machine down for a few bucks.

Dave

[jay]

I moved from PA to Canada in early 2007.
It was another year before I built out the basement.

Turned on my machines (4 units) and never had a batter issue.

My first battery failure was in 2012. Have had only one other since on a different machine.

Considering these machines were built in 1980/90 most appeared to have the factory battery on them.
20+ years is pretty good.

I think you have a short......

[mrv8outboard]

   I now am in search of a good S+ 10 mhz board.

[Shaggy]

Check with the home vendors, CV slots Rudy's, Midwestslots etc. I have about 4 extras, just in case.

[knagl]

is it only because I left credits and unplugged?

No, that has nothing to do with it.  I leave my machines (S+ and otherwise) off with credits stored on them, and the batteries last as long as I expect them to.

[rokgpsman]

Looking at what I cleaned off it could have been moisture that had gotten in there before I owned it? It is still up and running on the old battery today. So I may wait and see before I act. Here are the photo's I took last night.

The moisture residue or whatever that contamination is that you found near the cmos chip is probably under the socket. From your photo it looks like it is near the corner pin 28 of the cmos chip, which is the power pin for the chip where battery power connects. Since replacing the chip didn't fix the problem there is likely a unwanted conductive path under the socket that is draining the battery. It doesn't take much of a connection, even a hair-like amount will do it. The only way to know for sure is to remove the socket, scrub the area well and install a new socket since the board-side contacts of the old socket will have that stuff on them.

Like others have said, if replacement boards are available for a reasonable price you'd probably be better off just replacing it and get your machine back in business. You can keep the bad board and work on it if you want to. When looking for a replacement mpu board I think you have a choice of using an original 10 mhz style or the upgraded 12 mhz version, both should work ok in your machine. If not others here will correct me on this.

CORRECTON- the upgrade board is a 16 mhz version

[jay]

Hi,

Its actually a 16mhz board (not 12). Both boards work.

There are a few concerns for home owners in using the 16mhz boards.
1. You need a different game chip as there are functions related to the 16mhz board that don't exist in the game chips related to 10mhz. Ie The volume control is in the software and not adjustable by the small wheel that is on the 10mhz boards.
2. On the 10mhz boards the older game chips had 7 win songs for some themes. These were later replaced with accounting functions. You don't have this option with the 16mhz board.
3. Its commonly reported that the16mhz boards emit a constant humming sound. Not an issue in a casino but if you leave your machines on and not being played at home. It becomes quite annoying.
4. In addition to replacing the game chip - your program chip (the one that controls the theme) need to be on faster chips to work on the 16mhz board. If you burn your own roms you may already be using the faster kind as the older slower ones are not readily available to buy; however if you have IGT original chips they may not work. This would apply to clear and set chips. They need to be on faster roms.

I don't have any of the 16mhz any more.