IGT S+ Double Diamond fuse keeps blowing

[AWEInCA]

Hi I've had IGT S+ Double Diamond machine for several months and it has worked fine.

I recently moved the machine from one corner of the room to another corner of the room.

Since then the

8 VAC
8 A
240 VAC

fuse blows every time it is turned on. (It's the middle fuse)

Where should I start looking for the problem?
Does anyone have a manual for this machine?
Any help would be greatly appreciated.

Aaron

[Ozzy]

I would look for a loose coin or maybe (screw/nut) that has or is creating a short in the power intake module.


cheers   


O Z Z Y

[AWEInCA]

Thanks for your reply.

Where is the module? I am looking at the machine and found what I think are 2 possibilities:

The power intake module is on the cpu board off to the side?

Is it the box that the power cord plugs into?

[cp]

One place to look, among several others,  ...pull the hopper out, get a flashlight and look at the handle mech  Coil (usually wrapped in yellow...upper right corner,  just under reel shelf.)  Look for coin, washer, loose screw that may have found its way to the top coil connectors.  Other suggestion,  pull connectors and while you plug each one in... turn the machine on and  once the fuse pops again,  you can probably trace the line with an "issue".

[a69mopar]

I think Ozzy hit the nail on the head, I once found 27 tokens in the power supply of an S Plus machine. I take them out and make sure they are empty.  It is at the right lower corner of the machine held in place by a screw near the power cord and a nut at the right wall (you have to take the cover off, another screw, to get to the nut).

I hope this helps.

Thanks,
Wayne

[AWEInCA]

Thanks for the suggestions. No luck yet.

There were no coins or loose metal in the power box or on the coil connectors.
I reseated all the connectors and turned it on. The same fuse blew again.

I had a similar problem with a pinball machine blowing fuses. It had a bad bridge rectifier (I say that like I know what a bridge rectifier does, haha I didn't see anything that resembled the pinball bridge rectifier.

I can follow the wire from the fuse to the power module. How should I proceed?

Thanks again for your help.

[AWEInCA]

I found this thread:

http://newlifegames.net/nlg/index.php?topic=129.msg528#msg528

I'm going to try disconnecting the light tower.

.
.
.

Nope not the light tower either. The fuse blew again.

[AWEInCA]

I have the Power Supply out again. I'm looking at the wire that comes from the power module, to the fuse, then to the molex connector. This connector sticks out of the power supply. The cpu board plugs into this connector.

I'm not sure if the problem is the power supply or the cpu board.

I have a multimeter. Is there a way to test the power supply molex connector?

[Ozzy]

Sounds like you have a "short" on your 120VAC flu tube circuit, check all wiring to your flu tubes, especially on the door side where wires seem to get bent and stretched, usually a dead short from direct current to the door frame.


cheers


O Z Z Y 

[stayouttadabunker]

Hang on....I think your power supply is okay...
Pull out everything from the top and side of the power supply box....
plug in the power cord. turn on the power switch on top.
If the fuse blows...somethings wrong with the wiring to the power switch.
If it doesn't blow...plug in one of the fluorescent light wires (black and white and spun together)
If the fuse blows now, then it's the fluorescent's that's faulty.
If not , plug in another plug such as the the motherboard power molex.
Keep doing this until the fuse blows and you'll know which component of the machine is causing this.
Remember to turn off the power switch every time you plug in something or pull a plug out, okay?...
we don't want your hair straightening out.
Let us know which plug you put into the power supply box that's causing the fuse to blow okay?

[stayouttadabunker]

oh...you again....lol...sorry Ozzy...you following me man?

[AWEInCA]

I did all the connectors as you sugested already. It is the six prong connector going to the motherboard for sure. I verified that the fuse was part of the connection and indeed it is.

What is a flu tube?

[OhioGaming]

Disconnect the connector at the hopper.

[Neonkiss]

Welcome AWEInCA.
Looks like you have plenty of help in progress,
So I'll just extend my welcomes.
Please post back when you get it fixed. It's always nice to here back when you get it working again.

[AWEInCA]

Disconnect the connector at the hopper.

The fuse still blows

---

Thanks for the welcome!

[stayouttadabunker]

On top of the power supply box is your main molex for the power switch upstairs.
Leave that plugged in- you'll need it to turn on the power supply...lol
The others are for various things such as the "flu"...Ozzy meant the "fluorescent" lights wires.
or did he mean the "swine flu"? ...lol
Those are the black and white molex's on top of the power supply box next to the power switch molex.

First off, with EVERYTHING pulled out except the power switch molex, did the fuse blow?
If it did, then something's wrong with the power switch.

[AWEInCA]

Right. I did all that. The fuse blows only when the power switch molex and the mother board molex are connected. No other combination (including the power switch molex by itself) blow the fuse. Only the power switch and the mother board molex blow the fuse

[stayouttadabunker]

Did you look for quarters UNDER the motherboard?

Grab the big black knob on the MPU panel...wiggle it upwards...be careful, once it's loose, it likes to fly straight up in the air with your hands and you'll hit the sharp edges under the reel tray.
You'll see 3 Phillips screws hold the motherboard down to the floor.
There's also 4 tension pins that hold the motherboard down too...you take something like a long screwdriver and pop the motherboard off the tension pins.
Work the motherboard out.
Usually there's some old piece of styrofoam-ish plastic under the motherboard (that's to keeps coins out)
Fully inspect the bottom of the mother board to see if anything got shorted, burned out, blackish...
Do you have a spare motherboard to swap with?

[AWEInCA]

I checked under the actual mother board and no coins there.

I did look to see if they could have gone under the mother board connector board, but there is a foam pad under that board. I didn't think they could have gone under there (see pic).

[stayouttadabunker]

I agree,
Because the foam is under there, there's probably nothing there...
Okay, you see the clear (probably a little dusty) plastic cover on top of the motherboard?
Is there anything laying on top of the motherboard that could short out anything?
Quarters could still get under that clear plastic.

[stayouttadabunker]

I'd like to add that I can see you've pulled all the fluorescent molex's from the top of the power supply.
That's good...process of elimination....to determine which is burning out your fuses.
But, without taking out the motherboard, you never be able to check if the mother has any burned wire traces.
When I say "wire" traces, I mean the actual solder traces that act as wires on the motherboard.
Remember, the motherboard is the long rectangle board on the floor, and the "MPU" is the big upright panel (With the black knob).
You really need to inspect both boards for damage...traces, blackish stuff, burned out stuff,etc .
Something happened to them perhaps and that's why your fuses keep burning out.
Finally, the right-most purple wire inside the power supply. Pull it off the big coil. It's for 220V...European voltage.
Follow it to a black bus box on the floor of the power supply inside. Pull straight up and out.
ONLY the PURPLE ONE. and please...ONLY with the power cord disconnected from the power supply.
You'll only need the purple wire when you bring your machine to England.

[stayouttadabunker]

By the time we get done here...you'll be a certified slot technician...lol

[AWEInCA]

lol. Maybe it's time for a career change. haha.

I just figured the big board was the mother board. Thanks for the clarification. What is that black knob for anyway?

I'm working on taking out the mother board. No coins under the plastic thing.

Thanks again for your help!

[AWEInCA]

removed and checked the both boards.

The mother board (the small board) looked fine.

The MPU (the large board) did have something after closer inspection.

U27 looks like it was repaired at some point. Doesn't look pretty (not that I could do any better).

The picture isn't super clear so you can't see the details. What does U27 do? Could this be the problem?

[stayouttadabunker]

My goodness...good job! that's your short.
I don't know what that chip does, but anytime two traces
or wires are touching when they shouldn't be...will blow a fuse.
You can only be sure when that board gets tested to see if that is indeed shorted or
you need to swap the SS and SP chips onto another MPU board and see if the fuse still blows.
Someone nearby you may have a spare board to try this....

ADD>> when you hold the boards up with a very bright light showing behind them, you can also see right through the boards where stuff is beginning to burn out too. Hot stuff dis-colors the boards to a very dark golden color...