Help igt s+ buzzing and flashing candle code

[Powerlinemanco]

I wish we could. It's driving me crazy!

[CommTech]

Good Morning Eric!

Time for a summery report of what we know so far.  Please fill in any blanks and correct any errors that I have ...

We have an early style S Plus machine that was working fine before it was transported.
After you got it home and plugged it in you head a Buzzing sound.
You cleaned out all of the loose coins and replaced the PRIMARY 120 Volt 6 amp Fuse.

You power up the machine, Reels cycle once and candle indicating door open (all normal so far).
You close the machine door, the machine attempts to cycle again but gets cut short (mid cycle), then completes its cycle as it should (one time after door is closed), and candle is extinguished.
At this point you SHOULD have the "Insert Coin" lamp illuminated, as well as the LED display lit up, and ready to play.
Now after a brief pause it try's spinning the reels again, Still no LED display and the candle is indicating that the door is still open.
This cycle repeats intermittently over and over again with occasional reel pauses mid spin as if it's loosing power.
I have also noticed what appears to be your "Cash/Credit" button intermittently Illuminating when the machine comes back to life and tries to spin the reels.
After several cycles the machine then begins to "DING" each time it powers back up, accompanied by a loud hopper BUZZING and the Cash/Credit button illumination BUT NO REEL SPINNING at this point.
Removal of the hopper only eliminates the LOUD BUZZING sound, but everything else remains the same.

 

[CommTech]

Next you check all of the harness connections to be sure they are secured.
You Remove the Three screws holding down the motherboard and check under and around it for any loose coins that may be hiding.
You check the motherboard P8 power pins for shorts in reference to chassis ground.  RESULTS: ALL pins indicate OPEN with the exception of PIN 3 (7 VAC line) which shows 8.8 ohms*
* Since the 7 Volt line supplies the incandescent bulbs, I am guessing that you may be reading the low resistance across one or more of those bulbs.
You check all Three of the secondary supply voltages with the Power Molex unplugged and they are all present (7 VAC, 8 VAC and 24 VAC).

You try pressing the white TEST button with No Displayed Results
You try turning the reset key with No Displayed Results.

This brings us to were we are today.

[CommTech]

Our goal now is to get the LED display powered up and working.
The LED display will allow us to run diagnostics to pin down any additional problems.

The LED display gets is power Originating from the 8 Volt AC source (that was found to be present) which goes through the Motherboard up onto the MPU board, where it gets rectified to DC and sent back out Through the Motherboard again and out to the display.
We need to check to see if this DC Voltage for the LED display is present.

I will need to look up where (physically) in the machine you can check for this voltage.

I would also suggest that you carefully document (and/or take a clear picture) of ALL the harnesses that plug into your Motherboard, then COMPLETELY remove the motherboard from the machine.
Carefully examine the circuit traces on the Underside of the Motherboard (under good lighting) to see if you notice any burn marks or open circuit traces that may have been caused by a rogue coin.
All of the MPU wiring passes though the Motherboard so it is very important that this is thoroughly checked.
Also inspect all of the Harness socket pins to be sure that they are all in good shape as well.

[CommTech]

I have attached a location diagram for you to check the DC Display source ...

Make sure that your MPU board is back in and everything is hooked up correctly and powered up before checking for the voltage.

I am heading out for the day.  I will be back later this evening to check in to see how the progress is going.

Good luck.  

[Neonkiss]

It looks like you have received a lot of good information here but let me put in my 2 cents.
First off, I don't believe that what you are seeing is the maiden spin of the machine.
At boot up the maiden spin stops the reels from right to left. Yours are stopping from left to right as in normal play.

Knowing that you had lose coins that caused a short, I would throw a known good Motherboard at the machine first. If that doesn't correct the problem, try a known good CPU.

[Powerlinemanco]

Ok, removed motherboard and low and behold... It's fried! Here's  a pic of what I found.kinda hard to see, but off pin 1 of J8 to pin 1 of J14 and from D3 to pin 20 on J10. On the back the trace from pin 20 on J10 to pins 16, 14, 7, and 4 are burnt as well .(if I'm reading all the connector numbers right on the board) Im no electronics tech, but it looks bad to me. If so, where is a good place to order a replacement one? Can someone possibly post me a link to one so I can be sure I get the right one?

[Neonkiss]

I'm sure I have one.
PM me your address and I'll look tonight for one.

Did you find any other coins under the motherboard?

[Powerlinemanco]

Nope, no more coins. Sent pm. Thanks so much!

Btw, you prolly already know, but the part number on this one is 7590390 with a sticker under it that reads 75903904 rev a. Here's a pic.

[CommTech]

At boot up the maiden spin stops the reels from right to left. Yours are stopping from left to right as in normal play.

Good Catch! The strange part... or should I say Another strange part about the reels cycling, is other than the fact they are stopping left to right, the sequence is identical to the maiden spin.
That is, spin one complete cycle on power up and stop on the last games spin results... then repeat that same cycle once the door is closed (still stopping at the same last valid spin result).
Then of course keep repeating this along with power failures in between.

[Powerlinemanco]

Commtech, thanks so much for your help! Hopefully the board I'm getting from neon will fix this all up. Hope you don't mind if I pick your brain later on this if I need help..?

[CommTech]

Nice work Eric!    Glad to see you found the problem.
Always happy to help!  I love troubleshooting! 

[Powerlinemanco]

Ok guys, got the new board today. It is in the machine and hooked up. Anything I need to do before I turn it on or anything I need to do to set it up after I turn it on?

[Neonkiss]

Plug in, tune out and turn on.
You then should get the 61 code. Push the white test button and it will change to 61_1
 Then close the door and turn the key. The machine should reset and the reels will spin and stop from right to left.

[Powerlinemanco]

Timeout?

[Neonkiss]

That's auto correct for ya..

[Powerlinemanco]

Well crap... Still no display. That sucks, I was really hopin this would work.

[Neonkiss]

Now lets see if you plugged everything correctly
Pictures to follow

[Powerlinemanco]

K

[Neonkiss]

Connectors should be at
J5
J6
J7
J8
J13
J10

[Powerlinemanco]

I think it's all correct except that I don't have a connector for j13

[Neonkiss]

Here are the correct wire colors for the J13 pin

[CommTech]

According to the manual, J13 is for a Printer.  Do you have a Printer Neonkiss?

[Powerlinemanco]

Ok, it looks like the j 7 connector comes from the counters. The j6 connector is from my bill machine, the j 8 is power I think and is tie wrapped with the j 10 connector. The j7 connector comes down from the reels. I just can't find a j13 connector.

[Powerlinemanco]

No