Pole position Woes

dethfactor

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Donor 3 years: 2011, 2013, 2021
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Got a pole position board back from dickmilikan a few weeks ago and finally got some time to put it in the cab lastnight. Finally realized I needed 2 AR boards in the thing and fired her up. She worked great for a little bit but after making a few adjustments to the monitor it reset and I got a RAM 73 Error. Did a search and got a small amount of info. Checked the manual and didn't see what ram I need to replace in order to fix it. So any help would be super appreciated. Like the ram location, what type of ram, where to buy it and if you could order it for me and have it delivered to my house or stop by and put it on my board for me that'd be awesome. Or a finger in the right direction will be more that satisfactory.

I've also seen this weird test point tie together thing, is it worthwhile?
My pole position cab has an original power supply currently.

Thanks!
 
So just as I submitted this, Dick got back to me. I'll do what he suggested.

Thanks!
 
To help out those who search this thread in the future... please let us know what Dick suggested and whether or not it worked.

Dick gave me the following chunk of wisdom:


Unfortunately there is no ram 73 error in the Pole Pos manual, the only error code that ends in 3 is for ram 7J on the video board, a 2114 ram, try cleaning and re-seating the bridge connector between the boards, if it isn't clean and fully seated it can cause various ram errors, some valid and some not, also gently re-seat the four 10xx numbered chips at locations 3&4F and 3&4H on the cpu, it is a good idea to run the +5V and Gnd directly to the busses (or test points) on both boards but I haven't ever needed to run to any more than the first points by the edge connector end, any more is just overkill, the boards will almost always run down to 4.75V, any lower and most will start to develop problems so check the power on the board test points ( both boards ), 4.9 to 5.1 should be good, also a good idea if you are running the AR-II boards to strap out R29 and R30 on both boards, you can remove the resistors and put in short wire jumpers or turn the AR board over and run a wire across each resistor, they are the sense resistors and if the connector fingers get a poor connection the AR board attempts to compensate by raising the power supply voltage which can cause errors and possibly board failure.
Dick
 
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