Author Topic: IGT S+ no display (Read 8320 times)

tnjhead · « **Reply #20 on:** February 13, 2019, 04:56:16 PM »

found a receipt that may give some insight to my current problem

Stayouttadabunker · « **Reply #21 on:** February 13, 2019, 05:09:54 PM »

haha...It's really hard to see?
What are you seeing on that receipt?

tnjhead · « **Reply #22 on:** February 13, 2019, 05:52:44 PM »

bad m-board ex2 prom, was worked on by JC at new life games!

Stayouttadabunker · « **Reply #23 on:** February 13, 2019, 06:07:34 PM »

That's Joey? The owner of this website?

Call him and see what your machine needs...He'll know.
I'm sure he has parts....lol

tnjhead · « **Reply #24 on:** February 13, 2019, 06:13:41 PM »

must be him, ill look up his hours and give him a call, business card is attached to the receipt, smart man!

Badbaud · « **Reply #25 on:** February 13, 2019, 06:30:47 PM »

Bad connections on the 6 pin Molex power plug?

Stayouttadabunker · « **Reply #26 on:** February 13, 2019, 06:36:24 PM »

Quote from: Badbaud on February 13, 2019, 06:30:47 PM

Bad connections on the 6 pin Molex power plug?

I've been suspecting that Badbaud...
Personally, I'd be wiggling & tilting the Molex from side to side and watching if the display lights come on at all.
Then I know for sure it's bad receptor pins inside that Molex.

Jim · « **Reply #27 on:** February 14, 2019, 12:24:48 PM »

I don't think its a power problem, since the denomination lamp is on (6.3vac) and the reels are locked on power up, that requires all the ac voltages. 24vac is supplied to the diodes to create the holding voltage for the reels, also provides 24vac to the transformer on the board tray to feed the logic board, the 8 vac supplies another voltage to hold the reels and also make up the +vb voltage (which he read at the display board across the cap). either its a software issue, or the board is bad, but I don't think the cpu is running.

I have tested boards available.

Jim

Stayouttadabunker · « **Reply #28 on:** February 14, 2019, 01:13:27 PM »

I'm just wondering though if he opens the door and tries to add one service credit, the "Coin Accepted" lamp should turn on? ( Unless the lamp is burned out)
Because the "Denom", "Insert Coin", and the "Coin accepted" lamps work from the other 4-pin Molex at the far right end of the long display panel.
Whereas the "Winner Paid", "Credits", and "Coins Played" logic LEDS work thru the 5-pin Molex connector located next to the coin comparitor.

On the 5-pin Molex next to the CC, with no credits on the machine, I get readings of roughly around...>>>

Pin-1.Blue(DDO) =1.2v
Pin-2.Tan(DCLK ) =8.0v
Pin-3.Grey(STB1) =9.0v
Pin-4.Red(+VB) =9.2v
Pin-5.Green(GND) = ground

That's why I'm suspecting either a bad ground in the 5-pin black mini Molex harness on the display panel or
on the motherboards white power Molex from the power supply box.
I must be missing something?

But if you're getting voltages thru the 5-pin mini Molex next to the CC, then the problem may lay with the display panel I would think.
Anyways, picking up a spare board from Jim is not a bad idea...Always good to have a known working MPU!
and maybe another display panel too...lol

tnjhead · « **Reply #29 on:** February 14, 2019, 04:20:05 PM »

tried wiggling the molex connector, no luck. attached some more pics of what I've got. How much for another MPU?

tnjhead · « **Reply #30 on:** February 14, 2019, 05:06:34 PM »

i have now lost power to the reels. re checked all the fuses, double checked all the connectors, now i have no displays and no power to the reels. a schematic would be really helpful. just got the ones manual. no section 5/ schematics. hopefully the troubleshooting manual i ordered will have more info. I build elevators for a living, and fix and restore pinball machine for a hobby. not bad with a meter or reading prints. frustrating to troubleshoot blind on this thing. thanks to all of you who have been helping.
Travis

Stayouttadabunker · « **Reply #31 on:** February 14, 2019, 06:32:09 PM »

First, with no power at all sounds like a power problem.

Secondly, the SP GAME PROM is exposed to light.
The glass on that chip should be covered over with some tape at the very least.
If that chip is corrupted, that could give you problems as well.
Think of the SP GAME PROM chip as an operating system such as Windows Vista or Windows 10.
The SS REEL PROM chip is similar to like putting a DVD into a laptop and playing a particular song or a movie.

Thirdly, it's important NOT to install or remove the MPU with the power ON at any time.
Doing this may corrupt data on the MPU although I'm hoping the power was turned OFF.

There are 3 ways you can lose power to the reels from it's "holding" position...>>>
The white Molex coming from the power supply to the motherboard on the floor of the machine has bad receptor pins.
OR
The fuse on the power supply is burned out.
OR
The power supply box is shorted out. ( Possible loose coins inside shorting out circuitry? )

Remember, your reels were in the "holding" position before wiggling that white power Molex on the motherboard.
We need to try to get back to at least the state the machine was in before wiggling the Molex.

We will keep trying to help you as long as you need to get your machine up and running the way you want it to.

tnjhead · « **Reply #32 on:** February 14, 2019, 09:03:12 PM »

thanks for the help! yes power was off when i took the mpu out. i should have a schematic soon to help me meter out the power supply. fuses are good, checked with my meter. tomorrow i will pull the power supply and see if there's anything under/ inside of it giving me grief. again, thanks for all your help.

Stayouttadabunker · « **Reply #33 on:** February 15, 2019, 08:57:06 AM »

This may help.
Click on photo to enlarge if needed..>>>

Jim · « **Reply #34 on:** February 15, 2019, 09:38:18 AM »

for the amount of money you are putting out buying books etc., you should become a contributing member here, then all of a sudden some of those items will be at your disposal plus all the help from the members.

Jim

tnjhead · « **Reply #35 on:** February 15, 2019, 10:19:52 PM »

done jim, was planning on it because i want to buy more slots, see them come up broken and cheap all the time! i get great satisfaction from fixing machines and enjoy watching everyone play( pinball machines that is, also the bally slot i resurrected )

tnjhead · « **Reply #36 on:** February 16, 2019, 10:33:42 AM »

i metered out the 6 pin plug at the mother board, I'm getting millivolts, I've pulled the power supply, going to meter it out with everything unplugged

tnjhead · « **Reply #37 on:** February 16, 2019, 10:58:22 AM »

all the out going voltages from the power supply 6 pin plug are good, re checked continuity from the power supply to the mother board, all good. bad mother board?

tnjhead · « **Reply #38 on:** February 18, 2019, 03:43:06 PM »

update! repined the 6 pin connector going to the mother board, problem solved! no errors, working great! thanks to all who have helped me out!

Badbaud · « **Reply #39 on:** February 18, 2019, 03:47:22 PM »

Mic drop!

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Author Topic: IGT S+ no display (Read 8320 times)