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Author Topic: Credit Display - Double Red White & Blue, IGT S-plus  (Read 8998 times)

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Offline rokgpsman

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #40 on: August 10, 2018, 09:09:56 AM »
Thanks! See those 2 jumpers marked "E7" and "E9" ? We need to find out what they are for. Might be related to the display board not working.

A jumper is 2 or 3 metal posts that can have a metal clip added across 2 of the posts to make a connection. Having the clip installed or not installed makes a selection on what the jumper does.

It looks likes one of the posts on jumpers E7 and E9 is bent over to touch the other pin, maybe to try making a connection without using a clip?? Maybe someone lost the clip and did this. But that is a flaky way to make a connection. Check it out and see what you think.
« Last Edit: August 10, 2018, 09:32:08 AM by rokgpsman »
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #41 on: August 10, 2018, 09:28:13 AM »
None of those pins should touch anything - no jumper wires
I would straighten those out.

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #42 on: August 10, 2018, 09:31:05 AM »
Thanks Mark! Do they have anything to do with the digital display board on front of machine? What are your ideas on why his display board is not working?
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #43 on: August 10, 2018, 09:38:17 AM »
Have no idea what those are for. If they are touching that could be causing it I guess.
I see now it is an early s+.
« Last Edit: August 10, 2018, 10:09:32 AM by sixcardmark »

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #44 on: August 10, 2018, 09:51:56 AM »
Post deleted: It is an early s+ with different display.
« Last Edit: August 10, 2018, 10:10:51 AM by sixcardmark »

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #45 on: August 10, 2018, 10:51:53 AM »
If you look at the schematic on reply #32 you will see that the center line far left says Data Display. I can’t tell if it’s U40 or U46 on the MPU Board. I would try to meter the wires from the display plug to the plug going to the MPU to eliminate a broken wire since you have stated they look like the door has pinched or smashed those wires.
As for you display boards I would tend to think the differences come from different venders who make the boards. The black foam may be a factory install that was meant to be swapped to a replacement board. But over time the foam fuses to the display board making it impossible to remove.

You might want to consider sending that MPU and display board into KLar in Vegas. Alan there does great work on these early style boards and has the correct testers to check your boards for problems. You can reach him at 702-363-9998.
  Rokgpsman is it possible to get a better view of what MPU chip that is in that schematic in post #32? That way we can look at that chip on his MPU. The trouble shoot part of post 32 does say to try a replacement MPU or Mother board, so maybe there is a bad connection on the mother board?
Please remember to make a donation to NLG for mine/our help in repairing your machines problem.. Your donations help keep this site on line.
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If it's jammed, force it.. If it breaks, it needed to be replaced anyways...

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #46 on: August 10, 2018, 11:11:11 AM »
Here is a photo of the E7 and E9 area.
E7 has an intentional solder.
E9 has an intentional solder.
E7 AND E9 pins rising from the board do not touch from E7 to E9 in the air.





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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #47 on: August 10, 2018, 11:13:46 AM »
The "black foam" on the display board was likely for light blocking. It has been removed and discarded for good measure.


The casinos tampered tape has been removed and the underlying chips revealed.

SS4712
SP1227


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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #48 on: August 10, 2018, 11:27:28 AM »
I don’t think E7 or E9 are you problem, and I have seen this done on other boards. It just insures a good connection over the jumper clips.
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Offline BasementCasino

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #49 on: August 10, 2018, 11:34:04 AM »



Note: as I was reviewing the board mounted to the bottom of the cabinet, perhaps this is called the motherboard?, I noticed that there is an open ground connector on the base of the cabinet not in use. This connector is shown in the picture. It is the screw with the red sleeve in the bottom right.


I also noticed above that, in slots five and six of this black tray, there is a red and then a separate black wire both independent of one another but disconnected or cut off.

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #50 on: August 10, 2018, 11:40:53 AM »
I’m sure those cut wires were connected to some sort of casino data wires that were just cut off shorts when the machine was taken out of service. Very common thing, it’s faster to cut then to unhook.
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Offline rokgpsman

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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #51 on: August 10, 2018, 03:59:41 PM »
.....The casinos tampered tape has been removed and the underlying chips revealed.

SS4712
SP1227

The SS4712 chip is shown on this NLG S+ game page (link below). Does it match the glass on your machine? As you can see in the chart the SS4712 chip has a player win percentage of about 90%. The chart also shows that the reel strips are all 3 different, this is indicated by the strip code "ABC". If you ever wanted to change the win percentage to a different percentage you'd just install a different SS chip from this chart.

http://www.newlifegames.net/igtbible/IGT%203CM/Game%20Library%20-%20S-Plus%20-%20Double%20Red,%20White%20&%20Blue%20(3%20Coin%20Mul.htm



Your SP 1227 document is attached below, it will give all the settings options and diagnostic tests available in that chip, plus other info:
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #52 on: August 10, 2018, 04:22:04 PM »
If you look at the schematic on reply #32 you will see that the center line far left says Data Display. I can’t tell if it’s U40 or U46 on the MPU Board. I would try to meter the wires from the display plug to the plug going to the MPU to eliminate a broken wire since you have stated they look like the door has pinched or smashed those wires.
As for you display boards I would tend to think the differences come from different venders who make the boards. The black foam may be a factory install that was meant to be swapped to a replacement board. But over time the foam fuses to the display board making it impossible to remove.

You might want to consider sending that MPU and display board into KLar in Vegas. Alan there does great work on these early style boards and has the correct testers to check your boards for problems. You can reach him at 702-363-9998.

  Rokgpsman is it possible to get a better view of what MPU chip that is in that schematic in post #32? That way we can look at that chip on his MPU. The trouble shoot part of post 32 does say to try a replacement MPU or Mother board, so maybe there is a bad connection on the mother board?

That schematic diagram in reply#32 was from an older S-Plus manual, the mpu board in that manual is listed as p/n 755-057-10 and 755-057-0X. The motherboard in the manual is 759-039-0X.  As you know the "X" means any digit, some boards have slightly different part numbers but are considered equivalent.

EDIT-
Here are better copies of that drawing posted in reply#32. There are 3 chips used on the mpu to make the 3 data signals that go to the door display board. It looks like the display board needs 5 signals to work: VB voltage and ground, STB1 signal, DDO (display data output) and DCLCK (data clock). All of these signals come from the mpu board and then pass thru the motherboard and are then sent over wires to the display board mounted to the door.
« Last Edit: August 11, 2018, 12:12:07 AM by rokgpsman »
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #53 on: August 10, 2018, 04:33:43 PM »
Better images of schematic drawing for the door display board. It operates off the VB voltage from the machine, which is about 8 volts I think.
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #54 on: August 10, 2018, 04:45:31 PM »
Better images of schematic drawing for the mpu display data out circuit that goes to the door display board.
« Last Edit: August 10, 2018, 08:50:56 PM by rokgpsman »
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #55 on: August 10, 2018, 05:29:32 PM »
Have we had him check the pins on the edge connector of the MPU to the Mother Board for a bent or possible broken pin? It is also possible that at one time someone moved this game with coins in the hopper. This could have caused a short on the mother boards trace on the bottom of that board. Can’t tell you how many times I’ve pulled $2.00, $5.00 or more in change spilled around boards.
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #56 on: August 10, 2018, 05:39:26 PM »
I think I mentioned earlier about checking the condition of the display board wiring cable, from the motherboard to the display board. So I thought it had been looked at but maybe not specifically for bad connections with spread female contacts or broken off male pins. The original display board showed a lit "0" so I figured the VB voltage and ground was getting to it, that the problem was missing data or strobe & other control signals. Without a mpu or motherboard to swap in to the machine it is harder to decide what can be causing it.
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #57 on: August 10, 2018, 07:34:05 PM »
Looks like those jumpers on the mpu board (E7, E8, E9, E10) that have the posts bent and soldered together are part of an optional printer interface that was never implemented on the S+ as far as I know.

The mpu board in his machine is an older 10mhz model, not quite the same as the mpu boards we usually see. His mpu is part number is 755-057-04.


EDIT- I was reading thru the document for SP1227 and it says that the mpu dipswitch is not used with SP1227 chip installed. So disregard the dipswitch chart on the mpu metal tray.
« Last Edit: August 11, 2018, 09:52:17 AM by rokgpsman »
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #58 on: August 11, 2018, 12:48:40 AM »
I've reread the discussion thread and have come back to these 2 disconnected wiring cables that you mentioned early on. Do either one of them have 5 wires? If so do the wire colors match the same colors as the wires connected to the display board that is not working? Wanted to make sure neither of these disconnected cables is the other end of that door display board cable.

With the mpu removed you can see the wiring that lays along the cabinet wall and drops downward to plug into the motherboard. Have you looked closely at that wiring? That is where the door display board wires connect to the motherboard.

Like Amechanic mentioned you can use a meter to verify the 5 wires from the door display board connector are ok in getting to the motherboard. If they check out all the way from the door display connector to the motherboard connectors where the mpu plugs in then that would indicate the problem is likely with the mpu board.
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Re: Credit Display - Double Red White & Blue, IGT S-plus
« Reply #59 on: August 11, 2018, 06:21:08 AM »
I've done most of my homework.


I identified the cables leaving the display board and traced them through the door, into the cabinet, and to their respective connections. I carefully untwisted and sifted through the wires at the ''pinch point" where the door closes. Although the wires do get smushed, they don't appear to be damaged (coating is ok). They could be broken inside from repeated bending... No way to be sure without testing each (as you've mentioned.)


The two disconnected wire harnesses do not match the colors of the display. Those originate from down in the motherboard and don't appear to be for the display (but I don't know anything m, honestly).


I have checked the pins on the MPU / Motherboard connection. They're beautifully clean, straight, and uniform.


As for the "coins laying on the motherboard"  idea: I purchased the machine in this condition and do not recall wiping out change from the base of the cabinet. I have taken special precaution NOT to touch or potentially connect anything, ever. In fact, taking off the MPU took courage in itself.


Regarding the chips. I'm really excited to.fimd out that it pays 89% and hits every 5 spins on avg. This is good to know. I'm glad it's a"fair amount" for home play.


Can the display board be plugged into another machine to test it? I assume there would be a very specific requirement- but it's possible, right?


Also, let's not forget this other odd phenomenon:
Upon ordering 2 replacement boards with matching part numbers and using each... They behave DIFFERENTLY than the original board!  The 2 new ones are manufactured alike from the same supplier and neither light up whatsoever. This is odd to me, since the existing original board does always show the "0" in the winnings display.  Why would these behave differently? Should I just order yet another display board from a different supplier?
« Last Edit: August 11, 2018, 06:43:04 AM by BasementCasino »

 

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