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Author Topic: Universal Power Supplies  (Read 4336 times)

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Offline UNIMAN

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Universal Power Supplies
« on: March 15, 2014, 08:45:56 PM »
I hope the following enlightens Universal slot machine owners.   
The Universal manual says there are basically four different types of power supplies. (Not including Ultra Series Slots)
They are called the Green Dot, Red Dot, Yellow Dot, and Narrow/Intermediate power supplies.
I have not seen up close the Narrow/Intermediate, so let's look at the Green, Red, Yellow.
First of all, you will see no dots on the power supplies. Although I have seen lime green round stickers on a few.  arrow
It is hard to tell the difference just by looking at them.
The Green Dot was the first to come out.
Then came the Red Dot. The difference between the two are the green has a Tower-3 board and the red has a Tower-4 board.
The Tower board controls the handle.
Red and Green Dots are interchangable according to the manual.
Then came the Yellow Dot. The Yellow Dot was made for machines with electronic flouresent light starters. Electronic starters require 24Vac and ballast starters 100Vac.
Yellow Dots are NOT interchangable with Red or Green Dot. Manual says; the result will be blown fuses and possible damage to the mpu board.
So, logically if you have ballast lighting than your power supply is not a Yellow Dot. Right?  WRONG!
I purchased a couple of tourament machines last year. They have ballast lighting and Yellow Dot power supplies. What Universal did is add two additional wires and ran them from the hopper 100Vac power to the lights. Maybe they thought the hopper wouldn't be used in these tournament machines? The combined amp draw hasn't been a problem for me, and I use the hopper often. They also bumped up the two input fuses from 3 to 4amp.

So how can you tell them apart?
On that front 12-pin connector, across pins 6 & 12 are 100Vac on Red and Green Dots, and 24Vac on Yellow Dots. 
Looking at the front of the power supply, if the 12-pin connector is 4 across and 3 down, it should be;

1   4   7   10
2   5   8   11        Remember, pins 1, 3, 11 have a flat side in their socket.
3   6   9   12

If, as seen in the pic below, left most unit, the 12-pin is 3 across and 4 down, then;

3   2   1
6   5   4             Remember, pins 1, 3, 11 have a flat side in their socket.
9   8   7
12  11 10

Across #3 and #9 are also 100Vac. This is where the hopper get's power.

Added 10/30/08
Pin Outputs                                                                                         
 #1 = DC 5v     wire color PINK
 #2 = DC 24v   wire color ORANGE    (actual voltage between 30-35Vdc)
 #3 = AC 100v  wire color WHITE   test with #9
 #4 = DC 12v   wire color RED 
 #5 = DC 24v   wire color ORANGE    (actual voltage between 30-35Vdc)
 #6 = AC 100v for RED and GREEN DOT wire color white,   AC 24v for YELLOW DOT   wire color yellow
 #7 = GROUND wire color BLACK
 #8 = AC 9.5v wire color GRASS or light green
 #9 = AC 100v wire color GRAY test with #3
#10 = GROUND wire color BLACK
#11 = DC 32v   wire color Violet
#12 = AC 100v  wire color GREY on RED and GREEN DOT, AC 24v for YELLOW DOT wire color white with black stripe
The following power supplies are; Yellow, Red, Yellow, Red, Green Dot.

Offline Treehonk

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Re: Universal Power Supplies
« Reply #1 on: December 13, 2023, 05:38:39 PM »
Can you please tell me where to buy these?

Offline UNIMAN

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Re: Universal Power Supplies
« Reply #2 on: December 14, 2023, 07:48:59 AM »
I would try posting a want add here; https://newlifegames.com/nlg/index.php?board=4.0

I am no longer into slots, own no machines or parts.

Offline Pitts256

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Re: Universal Power Supplies
« Reply #3 on: December 14, 2023, 01:06:22 PM »
Is your power supply toast?

If the main transformer hasn't shorted then they can be repaired.

Should you have trouble finding one I'll repair yours for the cost of parts and return shipping.




 

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