Need The Experts For This Problem.

[Straycat]

Not to long ago I picked up two IGT S+ uprights. Both needed batterys replaced which went off without a hitch. Having the ram reset chip along with the BV chip one of these are confused. Tryin to run the ram clear, it beeps once but nothing shows on the screen an for some reason the machine skips through it an goes to the programing screen. Also doesnt run the BV chip, same thing just goes into the programming screen which seems the order is mixed up. Installed a new key set as well with the same results. Optics work but in a strange way. And the reels when tested spin forward but stop right to left instead of left to right. Puttting the game an reel chips in does bring up the 61 code, pressing the reset button does change it to 61,1. Closing the door doesnt seem to activate the optics to clear the error. Now neither the button or the key will change anything unless the door is closed ( tellin me the optics kinda work half assed ). With it closed now the key will bring it to a 65,0. Again, with the door open the machine still wont clear the error when pushing the reset button or turning the key but with it closed an you turn the key it'll go back into the programming once again. I took out the optics an motherboard an installed it into my other machine an low an behold the damn thing works...... I even used the ram clear on that machine and it worked. Along with the BV chip. Put it back in the other machine an back to the same ole crap as I said above. All conections have been cleaned, you can eat inside that machine now because its so clean. What is the cause of this? Candle does show the door open light an it does go out sometimes but wont play. Have I over looked anything? Ideas? suggestions? C-4? This is the first time Ive been stumped... Why are the reels stopping backwards? Why doesn't the clear ram an BV chip run in that machine ( both ram an BV chip's are new.) But work fine in my other one.  No damage to any of the wiring connectors no tapped up wiring anywhere in the machine and compared to my working slot, all the connections are correct. Help please.




Straycat

[Stayouttadabunker]

"With it closed now the key will bring it to a 65,0"

That code [65-0] means the single Eeprom chip is bad on the motherboard or backplane board on the floor under the MPU.

I had to say this in this way because many people get the MPU and motherboard mixed up.
The motherboard on an S+ is the one on the floor with all the harnesses running from it.
The MPU is the circuit board with the big black knob that has the blue volume potentiometer dial on top with the SS Game & SP reel chips, CMOS chip, and 3.6v battery.


If you have good soldering skills, you can easily cut the 8-pin legs at location [U1] and swap it out with a new blank 8-pin CSI 24c04 chip.
You can find it on ebay fairly cheap...It's kinda nice to solder in a 8-pin socket 1st - those are cheap as well.

Let me look for some for you.

Finally, to answer your other question, the reels stop from right to left when the machine is booted up for the 1st time after a memory loss.
The reason why the memory was erased  or corrupted was because of the battery change.
The battery is what keeps the settings and accounting data intact in the CMOS chip next to the SP & SS chips on the MPU.
After one regular game is played, the reels will spin in stop in normal order of left to right.


I would like to add that if you do NOT have any soldering skills, then it would be best to get yourself another motherboard.
The reason why your MPU worked in the other good cabinet was because the 24C04 chip is fine on the motherboard.
You also noticed the ram clear chip worked well in that other cabinet too.
Again, that is because of the good 8-pin 24c04 chip.
If you had went in the accounting mode by turning the reset key in the other machine, you would have noticed that there were no "Coins In", nor "Coins Out" data.
You may have missed that the reels stopped from right to left as well because of the ram erasure.

[Stayouttadabunker]

Here's an auction for a chip...>>>

https://www.ebay.com/itm/24C02-24C04-24C06-24C08-24C16-24C32-24C64-I2C-Memory-IC-Serial-EEPROM-Chip/223532474986?hash=item340b92e26a:m:m5xEU_L_jOJmqpPx0HKimjg


The sockets are dirt cheap and hard to buy just one...haha...>>>

https://www.ebay.com/itm/20PCS-8-Pin-DIP8-Integrated-Circuit-IC-Sockets-Adaptor-Solder-Type-D/383133814261?epid=23020375925&hash=item59348e0df5:g:zI8AAOSwLVZVqMtN

[Straycat]

Sweet, thank you for the info, parts were ordered but not from china, lol.