**Reel Slots** Gaming Machines => IGT S and S-plus Reel Games => Topic started by: freds on December 22, 2023, 11:40:54 AM
Title: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 22, 2023, 11:40:54 AM
Hi Fellow members, I have an S+ that is blowing the 6amp 24 volt line fuse. I have been troubleshooting and have gotten it down to when the molex plug behind the hopper is disconnected it won't blow. It does come up with code 3200 after that. I have connected the molex connector then disconnect wires to the 5 pin I believe triac. I have also disconnected the molex wires and it still blows the fuse. I have looked over the wires themselves and everything checks out. Looked over everything for loose coins or any metal objects. Motherboard is clean and power connector is clean with no burns. I have also looked at handle lockout and power supply for anything that could cause a problem. Any suggestion would be appreciated.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 22, 2023, 11:45:16 AM
Did something fall inside that slot on the right side of the power supply box? Pull out the wall plug before going in there. There's a screw just above where the 115vac plugs into it. That Philips screw holds the cover.
Did you write that "7" and "6" with a blue marker on the Molex housing? That's a 15-pin, 3-row Molex housing but only uses 6 pins. #1 Red #2 --- #3 Orange #4 --- #5 Doubled Green #6 --- #7 Gray w/Red Stripe #8 Gray w/Purple Stripe #9 --- #10 Yellow #11 --- #12 --- #13 --- #14 --- #15 --- Show me the colors going into the back of it on yours?. It should look like this below.
Click on photo to enlarge if needed...>>>
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 22, 2023, 01:21:29 PM
Hi Stayouttadabunker
Those markings were already there. It is in the middle of a pay. I took an image and the wires look the same. I pulled the power supply out and saw nothing.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: twinfire on December 22, 2023, 02:54:32 PM
Hey freds,
Thought I’d jump in & try to help.
This may or may not help you, but I opened my machines to get a picture of the wiring, both are S-Plus machines, one 1994, other 1996.
It’s hard to tell from your picture the color of the wires, but the wire on the top right of the hopper receptacle on the picture you provided looks like it could be white with a red stripe? I’ve put yellow arrows pointing to the wire in question.
The attached pictures I have uploaded are showing the wiring on the SSR & the hopper receptacle. Both of my machines are wired identical. The wire on the top right of the hopper receptacle on mine is white with a yellow stripe & the bottom right is white with a red stripe.
Hope these pictures will help with the troubleshooting.
GOOD LUCK!
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 22, 2023, 02:58:29 PM
Yep...good catch twinfire. White w/Red Stripe is for 115vac...it should on the bottom pin of the beau plug going to the hopper and the yellow one moved to the top. That's why he keeps blowing fuses. lol
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 22, 2023, 03:26:56 PM
I think the picture looked deceptive. I pulled the beau plug out and photographed and it's wired the same. The SSR wires match as well.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: twinfire on December 22, 2023, 03:54:14 PM
The only thing at this point I can think would cause this would be there is something wrong with the SSR provided the wiring has no chafes anywhere that could be shorting.
If you unplug the connector going to the hopper & the SSR with the hopper removed from the machine & no short, but then you plug the connector back together with the hopper still removed from the machine & it shorts, then I would think there must be something wrong with the SSR, or the tiny bit of wiring between the connector & the hopper receptacle/SSR.
Now, if it shorts with the hopper installed, then I would suspect a hopper problem.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 22, 2023, 04:41:53 PM
Yes I did try that. I removed the hopper and disconnected the beau plug and the SSR also. If the connector was connected the fuse would blow. I will take a closer look tomorrow and repost if anything changes. I think I may have to continuity check every wire at this point.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 22, 2023, 04:48:38 PM
You see the way you took that picture? That's perfect! :applause: That's the way you show the colors of the wires going into the back of a connector housing from now on.
For Your Information the SSR ( Solid State Relay) is that red plastic box ( sometimes black plastic ) on the left side of the beau plug. The MPU sends signals to it to switch ON/OFF the separate 115VAC for the hopper motor. The 115VAC is routed to the hopper beau plug on the bottom two pins. That's the same two pins I attach a power cord and light bar to bench test hoppers. Hee's an old video I made...>>>
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 22, 2023, 05:16:38 PM
Is it possible to test the SSR in circuit ? I disconnected the SSR while I had the molex connected and it still blew the fuse. I will double check that again tomorrow.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 22, 2023, 08:32:53 PM
if you disconnected the SSR, it had nothing to do with the fuse blowing....something else has a short. If there's no black foam under the motherboard, I'd pull out the motherboard and check undeneath it. Follow the smell with your nose...something is burning out or touching. :burningresistor:
Using a multimeter set for continuity, and the SSR out of circuit, the bottom two pins for the 115 VAC should be open. I'm not near a machine...I'd check for you. The fuse blows if the Molex is disconnected right? That tells you the problem is elsewhere....I'd pull that power supply box right outta there too and flip it upside down....something is shorting somewhere. Check the pins under the MPU too...two pins might be folded and touching. On the back of the power supply too, disconnect the two small 3-pin Molex's that go to the twisted wires for the fluorescent lighting and see if the fuse blows....at least you're checking the 115VAC lines. Keep the fluorescents unplugged for now until we figure out the short.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 04:37:04 AM
Thanks Stayouttadabunker, I will do those checks this morning. The fuse only blows if the molex is connected. If it's disconnected the fuse does not blow and I get the code 3200.
Update : I disconnected the fluorescent connectors on the back of the power supply. I installed a new fuse and powered up. It finished the pay. I put a coin in and the fuse blew again. It is back to the same pattern again now even with the lights disconnected. If the molex is connected the fuse blows. I will check those other items.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 23, 2023, 07:09:24 AM
Okay...Something's not right AFTER that Molex then....better have a bunch of fuses! The MPU is stuck in a state of telling the SSR to open so it can send the other power (115VAC) to the hopper motor to finish paying out. Because the hopper isn't paying out coins by a certain amount of time - the MPU sends out the [3200] code. [3200] means "Coin Out Tilt"...a jammed coin in the hopper bowl. I agree that the hopper isn't really the problem but I would check it out anyways...it's easy to emove the bowl to see if anything's jammed. Since you've determined the wires in that beau plug area are correct, the problem is narrowed down to a short within the SSR relay box.
Holidays are here, I don't know how fast you can get another one to replace the questionable one?
Because you disconnected them, the fluorescents aren't the problem. I'm confused now...how did the machine finish the pay without the hopper plugged in? The fuse burned out just by inserting a coin without playing the bet?
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 07:36:24 AM
Yea no sorry. In this one instance after doing some checks I reconnected the molex with the hopper installed and replaced the fuse and it finished the pay. I inserted the coin and it blew the fuse again without playing the game. It is now back to doing what it did before. If I connect the molex on power up it blows the fuse. I took the beau plug and SSR out with wires to the molex and checked over every wire for continuity and everything checked out. I decided to remove the fuse and checked the voltage at the fuse connector with the molex connected and measured 13 volts. With the molex disconnected I measured 27 volts. I don't know if that helps. Right now I am back to if the molex is disconnected everything comes up and shows code 3200. If I connect the molex the fuse blows. I did look under the mpu and all was good. I also disconnected the SSR and it still blew the fuse. Doesn't that rule the SSR out ?
Update: If I disconnect J10 from the motherboard with the molex connected the fuse does not blow.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 23, 2023, 10:46:33 AM
Pulling the J10 plug is the same thing as pulling out the molex that goes to the SSR and hopper Beau plug. Below is a drawing of the mobo.
Click on photo to enlarge is needed...>>>
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 10:49:54 AM
Yes I did not no if it had anymore relevance.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 23, 2023, 11:12:06 AM
"Right now I am back to if the molex is disconnected everything comes up and shows code 3200."
That tells us the machine did not finish paying out credits. It can't finish, because the fuse blows all the time, if you plug in the Molex for the SS an beau plug. When you unplug it, nothing blows....but you cannot pay out any wins.
Something is mis-wired and shorted. Only way to solve this is to start snapping clear, high-resolution photos - like you did in Reply #5, and hopefully someone will spot the poblem.
Just to help, here's a drawing of the hopper beau plug. The bottom two pins, as you can see, is for the 115 VAC hopper motor.
Click on drawing below to enlarge if needed...>>>
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Badbaud on December 23, 2023, 11:31:13 AM
completely remove the backplane board and see if there is a coin or two underneath it.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 12:55:02 PM
I will upload all I have. If I missed something let me know.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 01:06:59 PM
More
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 01:08:43 PM
More
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 01:11:22 PM
more
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 01:13:59 PM
even more
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 01:18:42 PM
some more
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 01:19:40 PM
last one I think
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: twinfire on December 23, 2023, 02:34:28 PM
I removed the hopper and disconnected the beau plug and the SSR also. If the connector was connected the fuse would blow.
So, essentially what you are telling us is that plugging in the wire harness that now isn’t connected to anything the fuse still blows, but when un-plugged it does not.
This can only mean the small end of the wire harness that goes to the beau plug/SSR is somehow defective. Are all the pins in the molex plug in good shape, not bent or touching anything, no debris inside the connector that could be causing a short?
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 23, 2023, 03:20:05 PM
I looked at all of your pictures...best I've ever seen. I see something unusual. In this photo below, pull out the smaller plug and leave it out for now...it's NOT needed and I don't know why it's in there or where it's going until you follow it up.....I'm going to circle it. It's in location [J13] on the motherboard. It's supposed to be the motherboard header for a "printer" that was never sold as an option until IGT came out with the S2000 platform.
Also, remove the MPU again and look undeneath for bent pins. The MPU, for your information, is the big upright board that has all the chips with the black knob. The motherboard ( It was always wrong, but that's what IGT called it...really should be called the "backplane") is the board on the floor with all the connectors plugged into it.
I see another possible problem too but you should look at these first.
Click on photo to enlarge if needed...>>>
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 23, 2023, 09:14:16 PM
I did look at the pins in the connectors as well and saw no bent pins. I will try pulling the J13 plug tomorrow and get back. Essentially twinfire is right that the harness leading away from the molex not going to anything is causing the fuse to blow. For me it has been a headscratcher. This machine was brought to me from someone reaching out thru a post on facebook. He told me it was working last year and developed this problem 7-8 months ago and has not worked since. What I do not know is if anything was changed or tried before me. He said he tried replacing the fuse but never got past that. I have pulled the mpu from the backplane and looked for bent pins and all is good. Will go another round tomorrow.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Badbaud on December 24, 2023, 09:26:22 AM
Completely remove the backplane board and check for a stray coin underneath it.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: a69mopar on December 24, 2023, 09:51:49 AM
I would pull the harness apart. The one from the plug that blows the fuse. I have had wires shorted in hidden spots, such as where the tie strap is. If it only blows the fuse between that and the hopper plug. I would also use my dmm to check for shorts in the hopper beau plug .
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: a69mopar on December 24, 2023, 09:54:13 AM
Completely remove the backplane board and check for a stray coin underneath it.
This is a good idea also. One of the first checks to do
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: lookes on December 24, 2023, 10:16:59 AM
Does it blow fuses with the hopper out of the machine? It's unclear to me.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 24, 2023, 10:41:38 AM
Thank You for all the responses ! The mystery may be solved. When I initially got the machine I looked for usual suspects of loose coins or metal screws and washers somewhere. As of this morning twinfire's earlier response of wires going nowhere got me curious. With all the wires disconnected after the molex I connected them one by one and powered up after all were connected. I was in a state where the fuse held with everything hooked up. After a few minutes I closed the door and the fuse blew again. I had checked the comparitor earlier and saw nothing of concern. I removed the comparitor bracket and looked things over. I did find a nickel wedged just after the comparitor behind the plastic ramp to the diverter. The diverter coil connection was right there with a little room for it to bobble front to back. It would bobble when I would open and close the door. Probably why the behavior would sometimes be inconsistent. I removed it and so far game is playing fine for about an hour now. Thank all of you for your responses !
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 24, 2023, 12:55:32 PM
There's the short!... :cool_thumb_up: :sherlock: Glad you found it! :yes:
Now you gotta tell us where all the J13 wires go? There's NO printer! If you have one, you'd have the first I've ever seen on an S+ lol
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: freds on December 24, 2023, 02:55:41 PM
No printer. I wire tied all the wires again. They look like they feed back to the molex plug.
Title: Re: Igt S Plus Blowing 6 amp fuse
Post by: Stayouttadabunker on December 24, 2023, 05:46:24 PM
okay.at least we know where they run to now.
It sounds like the nickel shorted out against those long wire tabs on the rectifier chip for the divertor solenoid on the divertor gate. That's not supposed to happen because IGT puts a small tube over the wire tabs...oh well...learn something new all the time. :yes: Get this....>>> In the schematics for the divertor solenoid, the fuse that protects that line...is that 6A, 24 VAC fuse. haha