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Author Topic: cal omega pixel will not keep memory  (Read 5125 times)

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Offline Motivasian

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cal omega pixel will not keep memory
« on: April 06, 2016, 05:06:49 AM »
I have the male/female poker game "pixel' it will not keep the settings and points when the power is removed. I tried changing the battery but still nothing. Am I missing a wiring
« Last Edit: April 12, 2016, 07:59:40 AM by Ron (r273) »

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Re: cal omega pixel will not keep memory
« Reply #1 on: April 06, 2016, 06:25:43 AM »
Can you post a photo of your machine circuit board where the battery is? Did you position the new battery correctly, positive end to the positive connection?

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Re: cal omega pixel will not keep memory
« Reply #2 on: April 06, 2016, 05:52:52 PM »
Yes I'm sure I put the battery in correctly because I have other boards.

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Re: cal omega pixel will not keep memory
« Reply #3 on: April 06, 2016, 05:57:18 PM »
Ok

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Re: cal omega pixel will not keep memory
« Reply #4 on: April 06, 2016, 06:59:40 PM »
just some ideas,,,

Was this board working ok at one time and all you did was change the battery because it died? Or is the board new to you and it was like this when you got it? If it was this way when you got it then I'd say the next thing to try might be changing the memory chip (or the memory board if it is the piggy-back board in the photo). You can try a known working memory chip (or memory board) from one of your other boards.

Also, are there any jumpers or dipswitches that have something to do with sending the battery voltage to the memory chip? Maybe someone changed a jumper or dipswitch? Lastly, is there a diode connected in line with the battery voltage, if so it may be bad. If you have a meter, with the board out of the machine you can measure the battery voltage on the memory chip battery power pin to see if it is getting there.
« Last Edit: April 06, 2016, 07:30:31 PM by rokgpsman »
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Re: cal omega pixel will not keep memory
« Reply #5 on: April 07, 2016, 12:15:18 AM »
Wow yes great idea!!! You didn't I think of that....thanks immature try it now.

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Re: cal omega pixel will not keep memory
« Reply #6 on: April 07, 2016, 12:24:29 AM »
OK wait...which one is the memory ....not sure

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Re: cal omega pixel will not keep memory
« Reply #7 on: April 07, 2016, 12:27:00 AM »
Since I'm at it....do u have any idea y my other board button not working

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Re: cal omega pixel will not keep memory
« Reply #8 on: April 07, 2016, 12:30:22 AM »
Ok

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Re: cal omega pixel will not keep memory
« Reply #9 on: April 07, 2016, 12:35:01 AM »
Wow yes great idea!!! You didn't I think of that....thanks immature try it now.
I'm unable to understand what you are saying here.


OK wait...which one is the memory ....not sure
I can't tell from your photos, they are taken from an angle and kinda dark and fuzzy,  I can't see the chips very well. You need to post photos with the camera directly facing the board and have more light so we can see it best.

I think the memory chip is on the piggy-back board, or it may be a socketed chip located near the battery, look for one that says "5101" or "611X" or similar.

What is the Cal Omega/CEI part number for the board? Should be written on the board somewhere.

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Re: cal omega pixel will not keep memory
« Reply #10 on: April 07, 2016, 01:13:45 AM »
Since I'm at it....do u have any idea y my other board button not working

What "button" do you mean?
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Re: cal omega pixel will not keep memory
« Reply #11 on: April 07, 2016, 09:46:25 PM »
Sorry and thanks for the help. I swappreciate the RAM chip but still no memory. The buttons I am referring to is the bounce, double, play, take, etc.

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Re: cal omega pixel will not keep memory
« Reply #12 on: April 07, 2016, 09:54:06 PM »
Ok

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Re: cal omega pixel will not keep memory
« Reply #13 on: April 08, 2016, 06:25:22 AM »
Those photos are better but I still can't read the markings on the chips. I think that is due to the camera shaking when you take the photo, that can cause fuzziness in the photo, details won't be as sharp. I have circled what I think could be the ram memory chips in your photos below, if you can read the numbers on the top of the chips, see if they say "6116". If not tell me what they do say. Once you know where the memory chip is you can measure the battery voltage to see if it is getting there.

Your 2 mpu boards are a little different from each other as far as the piggy-back boards. You said you swapped the ram, did you mean you swapped the piggy-back boards around?

On the button problem, do you mean they are not lighting up, or that they don't work when you press them?
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Re: cal omega pixel will not keep memory
« Reply #14 on: April 08, 2016, 09:45:16 PM »
Yeah the chip has the 6116 on it and I did swap it with another 1 but still no memory. I believe that it has sone thing to do with the piggyback

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Re: cal omega pixel will not keep memory
« Reply #15 on: April 09, 2016, 04:00:04 AM »
You can use a meter to see if the battery voltage is getting to the 6116 cmos ram chip. The chip has 24 pins/legs, they are numbered 1-12 down one side and 13-24 on the other side, see example photo below. With the board out of the machine measure the voltage on pin 24 to see if the battery voltage is getting to it. You should check the battery first, with the battery installed in the board, to make sure it is good. Place the meter leads on the two board pads where the battery leads are attached to make sure the battery voltage is there. Look for a broken circuit trace/path that connects to these pads, the traces may be on either side of the circuit board. They can get broken when an old battery is removed.

Then leave the meter's black lead connected to the negative end of the battery and check pin 24 on the 6116 cmos ram chip for voltage.

If the voltage isn't there then you can start looking for where the battery voltage path is broken. Possible places would be the connector on the piggy-back board, a bad diode inline with the battery voltage, etc. Look for broken solder joints on the piggy-back connectors and pins. If you see something you are not sure about just post a photo and we'll take a look.

I don't have a schematic drawing of your piggy-back boards, can you post a photo of each piggy-back board, showing top of board and backside? That will help, thanks!
« Last Edit: April 09, 2016, 04:22:41 AM by rokgpsman »
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Re: cal omega pixel will not keep memory
« Reply #16 on: April 09, 2016, 04:25:52 AM »
Sorry and thanks for the help. I swappreciate the RAM chip but still no memory. The buttons I am referring to is the bounce, double, play, take, etc.

On the mpu board with the button problem, does the machine play at all, or are all of the buttons dead? Need a photo of the entire machine, from the front, with power on, with this board installed, and a good explanation of what isn't working and what is working.

What is the history on your machine, is it new to you and broken when you got it, or was it working at one time then this failure happened? The more relevant info you can provide the easier it is to come up with repair suggestions.

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Re: cal omega pixel will not keep memory
« Reply #17 on: April 09, 2016, 03:45:45 PM »
All the info that u gave me has been a lot of help THANKS ALOT...I got one of my boards to work perfectly. But the other one still has the memory problem. It's not getting power to the memory and I don't think there is a path that will give it power.

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Re: cal omega pixel will not keep memory
« Reply #18 on: April 09, 2016, 03:48:38 PM »
Ok

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Re: cal omega pixel will not keep memory
« Reply #19 on: April 09, 2016, 03:50:48 PM »
All these boards are new to me. They were giving to me in a non working condition and I slowly got them to work thanks to all your help

 

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