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Author Topic: Credit Display - Double Red White & Blue, IGT S-plus  (Read 9003 times)

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Offline Amechanic

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #60 on: August 11, 2018, 06:53:03 AM »
Wire can break inside the insulation by repeatedly being bent or smashed in one location. Only way to know for sure is to use a voltage meter set up to check the continuity of a certain wire. You take the probes from the meter and touch the plug connection at each end, if you get nothing on the meter display you have a break in that wire. Putting your display board in a similar working machine is a preferred way to check it, but since that’s not currently an option we are back to the other options. Do you own a voltage meter? You can pick them up at places like Harbor Freight Tool for a reasonable price. Have you located what plug going to the MPU or Mother board the display wire are connected?





(edit to change "of" to "if" for clarity)
« Last Edit: August 11, 2018, 09:48:59 AM by rokgpsman »
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Offline rokgpsman

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #61 on: August 11, 2018, 09:37:18 AM »
It is odd that the 2 new door display boards don't light up the "0" like your original board does. So it might be possible that both new boards aren't working but that seems like a longshot since the seller tested and showed you that they did light up when he applied power to them. Since they don't light up in your machine that makes me wonder if the door display board isn't getting power to it from your machine or if the wiring to the display board is bad. We don't have to worry too often about the wiring but you mentioned your wiring has been crunched in places so it is something that's a possibility. There could be a bad wire (or wires), only making contact intermittently.

You could try another display board from someone that sells parts here on NLG, they will do more for you and will ensure that it is a working display board. That would eliminate the possibility that you have 3 bad display boards. If it turns out later that all the display boards are good then you can resell them.

The display board needs power to operate, this is the "VB" voltage, I think it is about 8 volts or so, and a power ground connection. That would be 2 of the wires in that 5 wire cable. The other 3 wires are the data and control signals so the display board can display whatever the mpu wants it to show. Like you and Amechanic said, a wire can be broken inside even if its insulation looks ok. The only way to find out if the wiring is bad is to either replace the wiring or check it with a meter, and using a meter to check it is much easier.

The meter will have different abilities, like measuring a voltage. That would be good for checking the VB voltage right at the connector on the cable where it connects to the display board. And the meter will have what is called "continuity" or "resistance" or "ohm" ability. That is how the meter verifies that a wire is good from one end to the other end.

Another option that some people prefer is to try replacing boards because that is easier for them than using a meter to troubleshoot. You could try another mpu board, and another motherboard, in either order. That might be easier for you, but you'd have to buy the parts. You could end up with extra parts if that doesn't fix the problem, but having spare parts isn't a bad thing when we have these 25 year old machines. If you go this route you may find that one of the boards fixes the problem, and if it doesn't then you come back to checking the wiring.
« Last Edit: August 11, 2018, 10:13:07 AM by rokgpsman »
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Offline BasementCasino

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #62 on: August 13, 2018, 07:51:41 PM »
I'll be sure to get the meter on the wire connections this week. Theres so much going on that It'll be a few days before I have the time to block out an hour of dedicated time to do so.


Thanks to all you for sticking with this thread while I continue to troubleshoot this darn"0" issue.   Note: it consistently does show the"0" reliably on the original board.

Offline Jim

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #63 on: August 14, 2018, 06:41:10 AM »
I doubt that the +VB is missing, nothing would be displayed if that voltage was missing.  the fact that the zero is on all the time leads me to believe that the board could be defective.  the puzzling item is the other boards won't work either.

the boards are the same, someone just turned the plug from the upright position to the side position. I'm sure if you straightened out the pins and pushed the black connector down ,it would be factory.

If the machine operates 100% and you have no displays, then your problem is a wrong plug inserted on the motherboard, it's pulling down the strobe 2 signal and not allowing the data to be displayed.

Jim



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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #64 on: August 14, 2018, 08:54:51 PM »
[size=78%]If the machine operates 100% and you have no displays, then your problem is a wrong plug inserted on the motherboard, it's pulling down the strobe 2 signal and not allowing the data to be displayed.[/size]



Could you elaborate on how I can *harmlessly* test a solution to the aforementioned 'wrong plug' ???


In any circumstance, I would rather have a functioning machine without proper credit display than an expensive repair or paperweight! I do not want to attempt a repair that could render me machine useless, or to damage some critical part, etc.

Offline Jim

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #65 on: August 15, 2018, 08:00:07 AM »
do a visual inspection of the plugs and where they are plugged into! very simple, doesn't require any hazards.  compare it to the attached.



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Offline rokgpsman

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #66 on: August 15, 2018, 08:16:42 PM »
This week someone else posted a photo of their S+ mpu board that is similar to yours, it has the jumper posts like your mpu board does at E7 thru E10, and E1 thru E6. On their board the jumpers posts are all left unconnected to each other. As Mark said back in reply#41 S+ boards don't normally have these jumper posts connected and they should be disconnected where they are soldered or jumpered together, just in case that is causing a problem. 

I don't know if this is related to your display board not working but it's worth a try and easy to do. Just unsolder or cut the posts apart that are touching each other. The soldered jumper posts are near U18 and the other group of posts are near the large white connector at edge of board. As far as I know these posts are never used, so it is ok if you cut them to get them disconnected from each other. If some have a removable metal clip that will be easier. This will make your mpu board match what we normally see.

Do this to the posts we have been talking about, not any other jumper posts like the ones near the SS and SP chips.

Here is how the other person's mpu board looks pertaining to those jumper posts:
« Last Edit: August 15, 2018, 10:19:52 PM by rokgpsman »
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #67 on: December 01, 2018, 01:28:23 PM »
It's been a while...


My family and friends have been playing the slot "as is" for the last few months. All was good until this week when I struck a massive 1440 coin payout. The machine currently had the credits, but I'd like to cash them out.


My fear is that I'll accidently trip a Mac coin payout error, requiring a key reset.


How do I know what the limit is for payout?  Remember, the display isn't working...

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #68 on: December 03, 2018, 08:08:09 AM »
Take a picture of the mother board and its connections and post it, we will determine if any are misplaced.

Jim
 



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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #69 on: July 08, 2019, 01:35:20 PM »
Thank You!
I'm very grateful for all the help I've received here. . I've been enjoying my machine, even though the display doesn't work, so much that I've decided to purchase two more.


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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #70 on: August 02, 2022, 10:16:03 AM »
Shucks, I was hoping there was a fix at the end! :) I have the same "0" issue with two MPUs and two displays.

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #71 on: August 02, 2022, 10:43:33 AM »
Start a new topic of your own and we'll help you fix it.
Remember, the more you tell us - the better we can help you!

Consider becoming a regular contributing member, which helps pay costs to keep this site up and running so you can keep your machine up and running :)

 

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