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Author Topic: Bb2 power supply repair  (Read 1524 times)

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Offline wireman

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Bb2 power supply repair
« on: April 23, 2019, 06:03:31 AM »
Hi good day I need some In repairing a bb2 power supply
Do any have some tips or a diagram for the power supply
Thanks in advance

Offline buzzarama

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Re: Bb2 power supply repair
« Reply #1 on: April 24, 2019, 03:08:41 AM »
See if these help.

Offline wireman

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Re: Bb2 power supply repair
« Reply #2 on: April 24, 2019, 04:48:12 AM »
Hi I have about 15 bb2 power supply to repair what are the common problems with them do any one can help


Offline jpeckinp

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Re: Bb2 power supply repair
« Reply #3 on: April 24, 2019, 06:50:30 AM »
Having worked on high end power supplies for years but not these I'm gonna say the biggest thing is most likely the electrolytic caps. They dry out or bulge.
If you are going to open them up and repair them even if they aren't bad now they will be so you might as well replace them. If anything else is bad it's most likely rectifiers or the power fets, they short out. I'm not sure about these supplies but you will probably have to remove them to check them.


One last thing the fan is probably ready for a change they are cheap.
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Offline idesign

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Re: Bb2 power supply repair
« Reply #4 on: April 24, 2019, 09:36:45 AM »
Have you posted a message on the Delphi WMS Slot Tech forum?  I recall someone posting a message about the most common failures of the BB2 power supply some time ago. 
If it ain't broke don't mess with it.....

Offline Brianpg

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Re: Bb2 power supply repair
« Reply #5 on: November 02, 2022, 07:57:45 AM »
Here’s my problem bb2 won’t fire up took a ps out of a working machine and still nothing

Offline Stayouttadabunker

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Re: Bb2 power supply repair
« Reply #6 on: November 02, 2022, 08:35:32 AM »
...took a ps out of a working machine and still nothing

Now you know the problem isn't the power supply.

To verify, put it in a known good machine and see if it fires up.

What's your history of this problem cabinet?
Remember, the more you tell us - the better we can help you!

Consider becoming a regular contributing member, which helps pay costs to keep this site up and running so you can keep your machine up and running :)

Offline Brianpg

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Re: Bb2 power supply repair
« Reply #7 on: November 02, 2022, 10:50:01 AM »
I put a good ps in it and nothing put this bad one in other machine and nothing

Offline iramack

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Re: Bb2 power supply repair
« Reply #8 on: November 02, 2022, 12:37:48 PM »
CPU seated Properly?

Backplane showing green lights?  Harness's all plugged in where they belong?  NXT 3 needs the extra power molex on the upper right side of the CPU.....If running in a BB2 cabinet check the power switch itself. Sometimes goes wonky........

SM

Offline Brianpg

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Re: Bb2 power supply repair
« Reply #9 on: November 03, 2022, 06:48:08 AM »
It was working fine. Tripped my breaker. Turned it back on and nothing. The only thing it’s doing is the cabinet light is on and I can hear a fan running but it’s not the power supply fan. If I put a good power supply in it  it still does nothing

Offline Slotman

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Re: Bb2 power supply repair
« Reply #10 on: November 03, 2022, 07:10:38 AM »
So the light in the cabinet thats on only tells you one thing, that the machine is receiving power and the cord is good.
More than likely the fan you hear is the top monitor which is fed direct so that tells you the same thing as the light.

The power supply fan is not turning on and there is no backpane lights, that tells us that the power supply isnt being triggered to turn on.

You took a known good power supply from another game and get the same result, that rules out the power supply.

Did you take the power supply from the non working game when you swapped and put it in the working game just to "confirm" the power supply theory?

So far all you have left is the switch and the switch harness. 

Looking at the wiring diagram, if you had a fault (short) on the harness to the switch on the unswitched side that is prior to the internal fuses, that would explain a tripped breaker.  The breaker would trip but not blow the fuses in the power supply. Possible that the fault cleared by blowing a wire apart. 

Can you open up the switch and check for continutity between the two poles?  Its a double pole single throw so you should have continuity between two poles and the other two poles.



Offline Eddiie

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Re: Bb2 power supply repair
« Reply #11 on: November 08, 2022, 12:22:31 AM »
If it blew the breaker, check the fuses on the PSU..   ah you probably did that.
Not sure why it would have tripped the (house) breaker.
On that note, a machine, it would just turn off after awhile.  Turned out to be something with the BV. 
Reseated the BV and it has been OK............................... strange

 

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