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Author Topic: Cal Omega 911 power supply board.  (Read 2199 times)

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Offline Edward301

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Cal Omega 911 power supply board.
« on: August 02, 2016, 06:56:25 PM »
I have a 1987 CEI Win Super Jackpot machine that I have had for about 18 years, has always worked great,
recently I turned it on, and get lights, fan, but nothing else comes up.

In looking inside the machine, I get 12v led light, and 5v led light, but the green led for Serial DC is not
coming on, and on the cpu board 906III board the red led for Serial DC is not coming on either.

Fuses check good, but something not right. 

Any ideas where to start.

Offline Amechanic

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Re: Cal Omega 911 power supply board.
« Reply #1 on: August 02, 2016, 07:42:10 PM »
I would start by taking every plug loose on the mother board and try reseating the plugs. Tin played connections can tarnish and loose their connection. Have you checked your fuses with a voltage meter or by eye? Fuses can just develop a hair line crack and not work, but still look good to the eye..
Please remember to make a donation to NLG for mine/our help in repairing your machines problem.. Your donations help keep this site on line.
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If it's jammed, force it.. If it breaks, it needed to be replaced anyways...

Offline Edward301

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Re: Cal Omega 911 power supply board.
« Reply #2 on: August 02, 2016, 07:48:46 PM »
I removed the board, check all plugs, checked all fuses with a vom, and even replaced all 3 capacitors since they
were so old.  Still no serial dc.

Offline Edward301

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Re: Cal Omega 911 power supply board.
« Reply #3 on: August 02, 2016, 07:51:34 PM »
Any idea what voltage the serial dc is.  I did check the bridge rectifier, and all diodes, which checked good.

Offline Amechanic

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Re: Cal Omega 911 power supply board.
« Reply #4 on: August 02, 2016, 08:26:54 PM »
I'm not too familiar with the 906 MPU. The ones I've seen and worked on are 903 & 904 boards.
Please remember to make a donation to NLG for mine/our help in repairing your machines problem.. Your donations help keep this site on line.
And remember...
If it's jammed, force it.. If it breaks, it needed to be replaced anyways...

 

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