New Life Games Tech Forums

Hi,

I have a Wild Cherry S Plus that when I switch it on, It keeps burning the tracks on the Backplain(Mother) Board. I am seriously stumped and have no idea where to go from here. I have replaced the PSU and unplugged everything except the whole friggen machine!!!!!!!!!

Anyone Please help!

May I see the burned traces on the motherboard?
I will be able to tell you if that can be repaired or replaced.
I have a feeling your power supply is set for European voltages?
Or the buttons are wired in correctly?
Make sure they're all wired and plugged into the switches the same way.

Open the door, pull out the hopper.
With a multimeter, measure the voltages going to the motherboard Molex.
If you look at it while it's plugged into the motherboard correctly, starting from left to right:
2 orange wires, a brown wire, a blue wire, and 2 green wires.
Set the multimeter at the highest setting, maybe 200Vac.

Stick the black multimeter probe onto the rightmost green wire and the red probe
into the 1st orange wire on the motherboard molex.
You should get a reading of around 12.5Vac.
2nd orange = around 12.5Vac
Brown wire = around 7.5Vac
Blue wire= around 6.5Vac
5th position green wire= nothing.

Now stick the black probe on the 5th position green wire and move the red probe
from the 1st pin to the blue wire and see if you get the same readings.

Let us know what your readings are.
Here's some pictures I took for you to show you how I measured these voltages with the power on.
Here's a couple of ways I measured them>>>

Look at your spin and or bet max sw the light wire is pluged into the cherry sw and not the lamp..

 it's back feeding 5vcc to the board..

Joeylc

Yep...Joey could be right too!!!
Them wires in the switches need to be the same way too...
Here's a couple more pics of my power supply readings to the motherboard>>>

Make sure you have the proper size fuses so that they blow first. Then make sure there is nothing under the motherboard (i.e. coins). The with nothing plugged into the motherboard except the power supply cable, start plugging in things until either a fuse blows or something starts smoking. Do not plug the MPU in with power to the machine.

Of course pictures of the traces that are burning would help.

Hi Guys,

Thanks for the help so far, this is what i have:

nothing plugged into the motherboard except power cable, The track on pin 6 burnt first, I repaired, replaced the Power supply and it burnt from pin 6 through to the Jumper For the MPU Switch.

I will take some pics tomorrow and upload.

Hope this info help

What jumper for what MPU switch?  :103-

 :5-  :103- :129- :128- :127- :191-


Wow!!!  This is a new one folks...!

1st person who can guess what he's talking about wins a free S2000!  :200-

Unless he is talkng about the cable that goes to the MPU cherry switch (if there is one). But he said all the cables were unplugged.  :103-

That's a rare picture dude!  :3- :244-
Thanks for showing us that!  :89-
You rarely ever see the MPU cage security Cherry switch, ever!!!

Lol,

I use a jumper to close the security Cage instead of a switch :).

Here are the voltage readings I am getting:

Between Green and Orange : 13.2VAC
Between Green and Orange/Green : 13.2VAC
Between Green and Blue/Brown : 2.3VAC
Between Green and Blue : 3.5VAC
Between Green and Green Pin 5 : 10.8VAC

Between Pin 5 and backwards:

Orange and Pin 5: 23.66VAC
Orange/Green and Pin 5 : 10.62VAC
Blue/Brown and Pin 5 : 10.62VAC
Blue and Pin 5: 8.47VAC
Green and Pin 5: 9.95VAC

I am assuming it is a fault with the power supply? seeing nothing else is plugged in. What could it be though? The Transformer or the CAP over the 220VAC input?

Thanks

Ok, this is still not making any sense.  :7- What jumper? What switch? And how can it be burning up between pin 6 and them if there is nothing plugged in?  :103-

Below is a motherboard with nothing plugged in. The only thing plugged in should be the power suppy cable on J8. If it is still burning traces with nothing plugged in, check all of the pins on the plugs to see if any are bent and shorting to another. And did you pull the motherboard out and look under it for coins etc?

I agree with Poppo.
Something is seriously shorted out.
You're getting almost 24Vac off of pin-5 to orange when it should only be around 12 vac !!!

Clue? Wrong voltage for country???



We really need more info AND PICTURES! And this talk of jumpers and switches is making me  :277-

 :96-

I agree...the "...jumper for the MPU switch..." has me stumped too.  :72-

His voltages readings are all over the map...something is crossed somewhere and I'm still inclined to
believe it's what Joey said earlier about a wire crossed under the button deck.

Crossing a wire there causes all kinds of baloney... :96-

BUT, he keeps saying everything is unplugged.  :25-

You mean, he's just plugging a power supply into a motherboard...nothing else?
And yet traces are burning off of the motherboard?

That can mean only 1 thing then.
It wouldn't matter if 220volts or 440volts was coming out of the power supply.
There HAS to be a short on the motherboard itself.

That's what it sounds like he is saying


But then he talks about a jumper and MPU switch.  :277-

lol...okay, I'm going to take an un-educated guess at what he means by that.  :5-

I think what he's saying is that the trace ("jumper"?) on the circuit board is
fried from the 6th pin on the white 6-pin J8 header to 31B & 32A pins on the P2 header?
I've seen this particular trace burn off the MB due to incorrect power supply output voltage on that line.
That happens to be a 12Vac line ( orange wire) at the 6th pin position on the J8 header
coming from the power supply and his is shooting out nearly 24Volts according to the readings he posted?!   :96-
Click on photo-shopped photo to enlarge>>>

Ok, then where is the mystical MPU switch?  :96-

IF the voltage is double, then perhaps he is in a 220v area (per previous quote) and the power supply is strapped for 110v. HOWEVER, if nothing is plugged in, then it still should not be frying any traces regardless how high the voltage is going in.

I agree but it was already fried before he disconnected everything...
which means the there's a short so when he unplugged everything
and turned it back on - other traces went to slot-junkyard heaven... :97-

Of course - this is all pure assumptions & conjectural Bologna-from-P.A. at the moment... :5-

Well, I am going to stop guessing until we get some good info and PICTURES.  :89-

lol yeah..
I better get back to work before I get fired.... :208-

Fixed... :89-


 :88- :96- :200- :72- :97-

Hey you! Get back to work!  :96-

I just got done working!

Oh...uh...well go back! They're calling for you!  :72-

Now I know you're fibbin'... :89- :81-


I get my work email on my cell phone and it hasn't rang in 20 minutes! :5- :186- :279-

Using Poppos Picture I drew in the tracks that burnt in green. The Blue Circle is the Power Plug for the Motherboard and the Red Circle is where I place the jumper for Card Cage (Pin 4 and 5). I measured the voltage without connecting it to the Mother Board and when it burnt the track again, I measured while plugged in and got the same readings. I suspected the motherboard until i replaced it and got the same problem, Same Tracks Burnt. I managed to now sort of repair the problem by replacing the Capacitor on the Power Supply. But now again I am Stumped with the machine hanging on a 65 3 Error. I placed the Ram Clear chips into the machine and all it would do is flash 7777 7777 over and over. I dunno Guys It is an Odd one for me too. We work on 220VAC in Tanzania and we have other machines with the same config in the PSU (Change from 110V to 220V) and they work fine. I even compared wiring from one power supply to another confirmed working one and they were exact. I hope this info suffices.

I remember when we were playing with certain SP S+ chips for SAS communications -
there was a 2-pin jumper needed in order to bypass the MPU searching for the drop door monitoring switch.
This was not needed as most home owned machines didn't have to enable the SAS features...
The 2-pin jumper was placed in the J2 socket on the motherboard to bypass it.
It was "Automatically-Enabled" whenever using an SP chip such as SP1213.
It looks like this in the photo I took below.
Click on any picture to enlarge...>>>

Also, you didn't need to use a clear chip to erase the [65-3] error code.
All you needed to do was turn the jackpot reset key once.
That would bring you to a [65-2], open the door and press the little white Test button and close the door.

No matter if you have 115Vac or 220Vac coming into the power supply from the wall outlet -
if the purple wire is in the correct position on the floor buss connector,
it will get transformed into the correct output voltages to the motherboard.

It's been a while since I converted a power supply from 115 to 220 but I will dig around
for the wiring schematics to see if you can compare it to how it's wired inside your PS.
If I remember correctly, it was just one single wire that needed to be moved at the floor buss to get 220v

I'm way confused at the wildly different voltages you're getting on the orange wires from your your PS readings.

Well, I am stumped. Except for that card cage jumper. There is 24vac on J2, so if the jumper is somhow shorting that pin, it would cook some stuff (since 4 and 5 would be grounded with the jumper). Any chance it's plugged in bckward and jumpering the wrong pins?

I'm not sure what capacitor you are talking about. All of the output votages from the power supply are AC. There is a filter in line, but that is all I see.

65_3 should be cleared by using the reset key. Most likely because you changed the motherboard and it has a different EEPROM.

Here's a close-up view of my motherboard's J2 header drop door jumper.
You can clearly see that it's jumping pins #4 & #5 >>>

Yeah, with a 20x zoom.  :96-
In any case, it was just a thought because there is nothing else that should be causing it to short. The jumper seems to be the only variable that was not removed from the equation.

I'd still like to a picture of your motherboard taken out of the machine Inienas.
The underside too.
High definition and high resolution...not a crappy cell phone cam shot.
Something is shorted out.
I'd like to see how you "repaired" the traces.

He's hooking up a card cage switch, not a drop door switch.  :71-

yes...you're right knagl...good call!...
However, the SP1213 PSR called for the drop door switch monitoring or "detection".
It's on page 5 of the PSR at option <0>[7].
I made that jumper specifically for that purpose as per PSR to get rid of the drop door monitoring... :103-
Now I'm really screwed up! lol
Attached below is the PSR I'm talking about though we have absolutely no idea what SP chip he was using before the frying event.

The J2 card cage switch jumper goes to pins #4 & #5 as shown below.
But it does NOT explain why his *tracks*  are frying up.... :72-
He is being very reluctant to show us a photo of this motherboard.... :79-
( the normal explanation is "I don't have a camera" or " I don't know how to upload pictures".... :200-
Click on schematics to enlarge if need be...>>>

That is why i was wondering if he had his jumper plugged in wrong and was shorting 2 & 3 together instead.

I'll bet the jumper was in the the 24V bell header... :97- :72-


 :98- :98- :98-     








...just kidding!

Here it is.  :72-

jason send mummy reel glass

Thanks Everyone I managed to fix the Problem. I replaced the Motherboard with another and the machine is fine. Thanks again. When I have time I will sit with the old board and do some fault finding.