Looking to get my Omega Race board repaired

SuperBee4406

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I am looking for someone who can repair a Omega Race PCB I have. Acid damage is not the issue. The board is in good condition. The battery leaked and did little damage before being removed(photos of the PCB below). The board is not booting. I am getting 5.10 volts at the mainboard. Spot killer is on, coin doors do make a click sound when power is turned on, and no sound is heard.
 

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Not sure if you're looking at the same pictures but that is pretty decent burn. You have to understand that the acid leaks all over and can do damage that you will never see if your eyes unless you strip the board.

If if you think the board is only lightly damaged it's way more than you think.
 
Agreed, you have to remove the chips/sockets and verify their condition. Certainly, the first few resistors are toast, and you should check the continuity of all the traces from each chip leg in the first 3-5 rows on the battery side at the very least. From my own experience, the acid can leave the leads looking dull but physically intact, but after you try to remove them and find the legs disintegrating into powder, you'll see there's more than surface damage done by the battery leaking.
 
Messed around with the board tonight. Reflowed some solder and replaced a bad transistor. Now when I turn on the game and hit the coin in, the player lights flash. So I push a button and the lights stop flashing, so I guess the game is playing. Since the monitor needs to be rebuilt also I can't see whats happening. But I guess when the games over the player lights will flash again. So I am figuring theres life in the boardset, so I guess I should focuss on the monitor now.
 
I have been messing around with the boardset today, and made some serious progress today. Here is what I did so far, to the main PCB. Replaced all caps, replaced all transistors. I did a basic "get it working" job to the monitor. It had a shorted transistor on the case, and I replaced what caps I had on hand, and did lots of solder reflowing. So I decide to try to the boardset again. I turn on the game and at first nothing is showing, so I figured the boardset is dead, ohh well. But then I turn away with the game still on. I turned back around to see the game semiworking. No sound and the screen is very jumpy, But I am playing Omega Race!!!

I want to get a cap kit and pots for the monitor to get it stable.

Any suggestions on how I can get the sound working?
 

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Check the processor and ram on the sound board, if you turn the volume upon the sound board and touch the back of the pot can you hear a humming noise ?

Turned the volume up and I hear nothing. Touching it there is no hum.

Self test says I have
Bad ram at "BBU RAM" and "Ram 2 NG"
Also, how you adjust +12?
 
Have you got 12v? adjustment is on the power supply PCB. I think 12v hits the sound board on connector J3 PIN 9.

Ram2 will be the Ram at RS/2 OR R/3 on the PCB.

BBU ram is for book keeping....you can remove it for now, it will play fine without it.
 
Made progress on my Omega Race today. I was working on the sound issue. Problem was no 12v getting to the daughter PCB. Got out the schematics and followed 12v back to the power pcb. Now the power pcb is producing 12v DC, but it seems the 12v DC the sound needs is not this 12v DC on the power pcb. So I then looked back further and found that the 12v DC the sound is looking for comes from the second large transformer in the cab. Now its 12v AC coming out of the transformer, which then runs thru the filter assembly then to the power PCB, where it goes thru the bridge rectifier circut and becomes 12v DC, then out the connector to the audio regulator. I found the transformer was not outputting 12v AC. I tried another transformer I had and bang, I hear sound. Now I am working on why I only hear some sounds out of only one speaker and not two. Its gettin closer........:)
 
Good job man! I always think its more satisfying when you can fix a game yourself. However it does help to have Omegaman on the KLOV boards to get you over the hump when you hit a problem that stumps you. ;)
 
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