New Life Games LLC
**Reel Slots** Gaming Machines => SIGMA Reel Games => Topic started by: Davros on October 26, 2017, 07:33:22 PM
-
I have acquired a 3 Reel Sigma Slot machine. Unfortunately someone has removed the data plate and I do not know the model or serial.
I would like to find out more about it, and try to get it back to 100%. The sound is a bit wonky, and the reels don't seem to line up well to the "win" line.
As they say, prevention is worth a pound of cure, so I would like to give it a thorough going through before I make a permanent place for it in the house.
Any help identifying it would be greatly appreciated.
Marc
-
Just a guess,,,
you may have either a Sigma SG-32 or SG-50. Both machines are very similar, but the SG-32 is smaller, more compact. Measure the height of the machine, the SG-32 is about 40 inches tall and the SG-50 is about 46 inches tall. The SG-32 is also more narrow at approx 18 inches wide, the SG-50 is about 21 inches wide. Many of the parts will interchange between the two models. If your machine does not match these height and width sizes then you could have a different Sigma that I haven't seen.
-
Thanks for the quick reply,
I wish this still had the Model Identification plate, but all that is left are two rivets and a rectangular shadow...
This unit is 37.5 inches tall at the wood case and about 40 counting the chrome front. Its 18.25 inches wide and 22 inches deep at the coin collecting bin.
It more closely fits your profile for a SG-32 but all of the photos I have found for SG-32's show a bill validator. Was this only an option? Also the boards look to be in a different location, i.e. over the reels vice under.
Thanks again!
Marc
-
Thanks for the quick reply,
I wish this still had the Model Identification plate, but all that is left are two rivets and a rectangular shadow...
This unit is 37.5 inches tall at the wood case and about 40 counting the chrome front. Its 18.25 inches wide and 22 inches deep at the coin collecting bin.
It more closely fits your profile for a SG-32 but all of the photos I have found for SG-32's show a bill validator. Was this only an option? Also the boards look to be in a different location, i.e. over the reels vice under.
Thanks again!
Marc
I not overly familiar with the Sigma machines but I believe the bill validator was an option, especially on the earlier made machines. The manual mentions that the model name will have a "B" at the end if the machine has a bill validator. (SG-32, SG-32B). So that indicates some models wouldn't have one.
Have you looked inside the machine for any stickers or tags that might give info about the model name/number? Sometimes on the reel assembly there will be writing, or on the interior cabinet walls, inside of main door, etc. From what I've seen there weren't too many different Sigma machine models with 3 reels. Does your mpu board (main circuit board) have any writing or stickers, also what is the part number of the mpu?
From your measurements I agree that it could be an SG-32. But there was a later model they came out with called the SG-150 and I believe it was a 3-reel slot machine, I think it was a redesigned and updated SG-50. They may have done the same thing with the SG-32 and made an SG-132. I'll try to find more about it.
I'll post a couple of drawings of the SG-32, maybe it will help.
Keep in mind that companies sometimes make changes to a machine model over time.
(click image to enlarge)
(https://s1.postimg.org/870ywkj3lb/SG-32.jpg)
.
(https://s1.postimg.org/1icalznrf3/SG-32_interior.jpg)
-
The part number of your machine's mpu board may be a good way to identify it.
(click image to enlarge)
(https://s1.postimg.org/37p7ni3efz/SG-150_Plus.jpg)
.
(https://s1.postimg.org/51o0t98hyn/SG-150_Plus_outline.jpg)
-
looks like they took a HR-IM Video poker) cabinet and made it into a slot. used the SG 32 door parts. The only difference in the SG-50 and 32 was the physical size. most all the parts (except the glass) are the same, the later version had a different power supply, instead of using the three individual supplies on top of the cabinet, they mounted one behind the reels or behind the hopper. if you push the black button on the side where the white cherry switch is you can get into the test mode and check out the entire machine. the boards were some what identical, one board did not have a daughter board to talk to the bill unit.
they used different types of storage devices for ram batteries, the one in your picture is the "super cap" version.
here are the machines, SG-50 and video poker (HR-IM) http://newlifegames.com/nlg/index.php?topic=17612.0 (http://newlifegames.com/nlg/index.php?topic=17612.0)
Jim
-
Thanks for helping me with this!
I have gone through the unit looking or any other labels or means of identification. There is not much to report. I have included pictures as some of what I found is hard to read.
The MPU board is simply labeled MS-Slot.
There is a sticker on the board, but it means nothing to me. one is labeled OS109-92741 and the other is OS109-92740
The E-Prom is labeled
ROM-NO
MS-Slot
30UND (Maybe)
Version
Tough to read (see pic)
Other than that there are a number of wires that don't go anywhere, and someone disconnected the "Meter" key switch from the wires. (Those wires look like they were stripped to be tested.
All pics attached below.
-
And some more pics with the reels and hopper removed.
-
Thanks for helping me with this!
I have gone through the unit looking or any other labels or means of identification. There is not much to report. I have included pictures as some of what I found is hard to read.
The MPU board is simply labeled MS-Slot.
There is a sticker on the board, but it means nothing to me. one is labeled OS109-92741 and the other is OS109-92740
The E-Prom is labeled
ROM-NO
MS-Slot
30UND (Maybe)
Version
Tough to read (see pic)
Other than that there are a number of wires that don't go anywhere, and someone disconnected the "Meter" key switch from the wires. (Those wires look like they were stripped to be tested.
All pics attached below.
To what extent does the machine work or not work? Will it accept coins and gives credits? Can you press the SPIN button and get the reels to spin?
Could the mpu board part number be on the backside of the board? Usually a circuit board will have its part number stamped or "masked" onto the board, as part of when the board is created and green coating is applied. But maybe those little white stickers are the way Sigma did it.
Can you post a photo showing the entire mpu board?
It looks like there are 3 keyswitches in a row, is that right? If the keyswitch that is disconnected is labelled "Meter" perhaps they did that to stop the meters from making noise?
The eprom with the label could just be the sound eprom. The game software eproms are the ones with the red security tape residue on them.
-
The machine runs well, it accepts quarters, pays out and generally runs fine.
Only issue is the sound starts out high quality, and gets worse over about 15 minutes. It has a motorboat sound to it. If I disconnect and reconnect the speaker the process starts over.
Other than that I have an old slot machine that I want to keep in good working order.
I ran the test like Jim suggested, but I had no idea what I was doing so I didn't do anything but watch it.
Marc
-
The sound amplifier circuit will have some capacitors, one of them might be bad, they dry out on older machines and can cause a problem. You or someone could try replacing the larger capacitors in the sound circuit. If the sound comes from a small sound board you could even replace it by getting another sound board from a Sigma machine that is being parted out. I think Jim has several Sigma machines he is selling parts from. If you decide to do this just get the part number off the sound board or post a photo of it and respond to Jim's ad. Sigma parts are sometimes hard to find so this would be a good chance if that's what you end up wanting to do.
http://newlifegames.com/nlg/index.php?topic=17612.msg93575#msg93575 (http://newlifegames.com/nlg/index.php?topic=17612.msg93575#msg93575)
-
Where would this sound board be located? There are only two boards other than the main. The small one on the door, and another small one mounted to a piece of wood next to the arm mechanism.
-
Where would this sound board be located? There are only two boards other than the main. The small one on the door, and another small one mounted to a piece of wood next to the arm mechanism.
I don't know that there is a separate sound board, the sound circuit might be on the main circuit board (mpu). If you follow the speaker wires back they should connect to where the sound comes from. Or post photos showing each circuit board (showing the entire board) that the machine has and maybe they can be identified.
Does the board that is mounted to the piece of wood look original, or something someone has added? I don't think a casino slot machine uses any wooden parts normally??
-
All functions are located on the main logic board, no sound board in a Sigma machine. if you get the copy of the manual it will explain all the test and how to do them. I believe if you donate to the site you can see the manual.
Jim
-
I pulled the main board and found the part number of the board.
It is a B31-1B
I'll post pics later tonight. I'll also look to see what the other board is labeled.
I will definitely need the manual to make sure I change the right caps. Is the SG-32 in the download section?
Thanks to both of you for your help so far.
-
Because the SG-32 is so similar to the SG-50 they are both in the same manual. The manual has 129 pages, the cover is shown below. There are also some manuals for the SG-112, SG-150, SG-300, SG-1700, SG-1900. Some of these models are video display, not 3 reel mechanical slots.
Keep in mind that often these type manuals were written for casino employees, so they frequently do not have service or repair info detailed enough to show schematic drawings or parts list for circuit boards. Casino employees often just replace a bad board with another one, then send the bad board somewhere for repair. That way the machine is back in operation quickly, and the casino doesn't have to train board technicians. I'll look thru the SG-32 manual to see if it has detailed mpu board repair info. But even if it doesn't the manual would be very helpful to have if you plan on keeping the machine. But I'm not sure the machine you have is an SG-32?
(https://s1.postimg.org/9t1ks77v67/SG50_SG32_manual.jpg)
-
You may already know, but just in case, one of your earlier photos showed the Volume control for the game sound. It is shown below (white round adjustable part). That large purple metal heatsink is probably the audio amplifier and the parts around it are likely part of the audio circuit. It looks like there are 3 large capacitors right in front of the audio amp (they are the blue cylinder-shaped parts). This is the area that might have the bad part that is causing the "motorboating" sound you mentioned.
(click image to enlarge)
(https://s1.postimg.org/5qbycbvpr3/disc_meter_Z1.jpg)
-
The SG-32/SG-50 manual in the NLG download area does not have information about repairing the circuit boards. The only electrical diagram it has is the overall wiring diagram for the machine cabinet, shows all the cables and where they go.
Also, the manual says that the SG-32 has 3 circuit boards, called the CPU, Door Distribution and Hopper boards. It says that some machines have an optional 4th circuit board called the SIS board. The SIS card is for connecting the machine to the casino server computer network, for players card tracking, financial data, etc. Not needed for home use.
-
Unless I missed it, the SG-32/SG-50 manual does not have any part numbers for the circuit boards in the machine. In fact, there aren't any part numbers for anything.
Here's a page from the SG-32/SG-50 manual about the 3 keyswitches on the side of the machine:
(click image to enlarge)
(https://s1.postimg.org/2zysloo5nj/Key_Switches.jpg)
-
All terrific info. It's too bad there are no schematics and part numbers.
I guess I will replace the large capacitors that are near the volume pot. If that doesn't clear up the audio, I will just leave the speaker unplugged.
The only other thing I would like to have is how to use the test feature.
Other than that I will have to keep ant eye out for a repair manual.
-
If you adjust the volume control lower does that reduce the bad sounds?
Keep in mind that Jim may have a mpu board like yours and you could get another one from the machine he is parting out. If you don't have a lot of money already spent for this machine then you'd still be ok if you bought some parts for it.
I'll take a look at the test feature to see if there is an overview.
-
There are several pages in the Testing chapter, can't post them all. Here is a sample:
(https://s1.postimg.org/6yxa2br7fz/SG32_TEST1.jpg)
.
(https://s1.postimg.org/4wu8sfkrpb/SG32_TEST2.jpg)
.
(https://s1.postimg.org/1reqti301b/SG32_TEST3.jpg)
-
All terrific info. It's too bad there are no schematics and part numbers.
I guess I will replace the large capacitors that are near the volume pot. If that doesn't clear up the audio, I will just leave the speaker unplugged.
The only other thing I would like to have is how to use the test feature.
Other than that I will have to keep ant eye out for a repair manual.
That motorboating sound problem can also be caused by the power supply, it has many capacitors to keep electrical circuits in the machine from sending unwanted feedback (and other interferences) from one circuit to another. Since the power supply connects to everything electrical this can happen. For example, if one of the power supply capacitors fails then you can get feedback from the sound output stage that goes back into an earlier sound circuit and gives a sound problem.
If you can get some spare parts for your machine at a reasonable cost I think it would a good idea, good working parts for these Sigma machines are not as readily available as they used to be. Spare parts like a cpu board and power supply would be good to have on hand for troubleshooting and in case of a failure at some time in the future.