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This link has now moved to; https://www.ukvac.com/forum/threads/atari-pole-position-2-pcb-repair-cars-missing.69406/

If it's happening in just one cabinet with 2 sets of otherwise good PCBs I would suspect the edge connector first. I would (and do) run jumper wires from the AR2 GND and 5v test points to the PCB equivalents just to take some of the strain off. You can (if you have the right tool) remove the...

Cars and signs (motion objects/sprites) missing - problem and solution: http://www.ukvac.com/forum/atari-pole-position-2-pcb-repair-cars-missing_topic381972.html Dan

Sorry, I should have made it clear that it was the 07 custom socket. I did have to replace the 161 and a few other IC's, this issue was still there even after that. They had been working for years with the damage but when it died I thought I should replace them while I was looking for this...

OK I finally got to the bottom of this one so posting in case it can help someone else in future. The cause of this issue was that the 128V clock signal from custom 07 @7M (pin 20) wasn't reaching the 74LS161 @6A (pin 2). The root cause was a bad 28 pin socket for the 07 custom. Once this...

I bought a set of extractor tools years ago luckily, they seem to be much more expensive now. I have a set of 5 like this one but of varying sizes and they work great for Molex/Amp pins - both male and female...

No, the reset happens (it switches from low to high) but nothing changes on screen at all. I was wondering if the rom test is a little bogus for the Z8002 roms? I'm sure I read somewhere that the z80 running the test can only address them partially. Will give them a pull/clean/romident to...

Hi, thanks so much for that info. I checked 8E and it seems to be toggling the RESA/B signals correctly (at both 8E and the Z8002's). I tried swapping the Z8002's over, just to see if there was any slight difference (there wasn't). I'll try some other Z8002's next and maybe some new sockets...

Hi guys, Wondered if anyone had ever seen this before? Had a totally dead PP2. Have replaced the z80 CPU and CMOS RAM (7E) sockets and got it somewhat further. It now passes Fluke tests for all RAM and ROM that the z80 can see. Upon boot it seems to go through the initial tests fine and...

Where it does matter is with the lighting ballasts. Running those using a step-down will run them at the right voltage but at the wrong frequency. This usually just means the ballast won't work or will quickly fail (often causing short circuits) but in the worst case they can catch fire as...

This sounds like a better long term solution given that all 2212's will all die sooner or later. Are you happy to share some more details Mark? DanP

You could have an issue in the wiring loom. These looms are now getting on for 40 years old, sometimes a small bit of resistance can build up and that can lead to humming. I had the exact same issue you describe in an Asteroids Deluxe and fixed it by repining the connector pins and crucially...

At least you've got a RAM error that's displayable. A lot of PP RAM errors just give you a screen of garbage! RAM 30 is 3E on the Video PCB (a 6116). There should be 4 6116's at 3 and 4 E/F. Try moving the one at 3E to one of the other locations and see if the RAM error moves with it. If...

Cool, interesting to hear. I think if you wanted you could make a nice sideline in those cables. The pods are obviously not much use if you have one with broken or missing pins and they aren't easily interchangeable between pods (i.e you can't just take an 8088 pod cabs and swap it onto a...

Be interested to see what you plan to do for the pod > UUT cables? Cool project though, the lack of pods (or affordable ones) is stopping a lot of people getting more use out of their 9010's.

I think there's one other major difference between the 01 and 03 AR1's, the 01 uses a different connector to all other AR's for the audio out section, it's 4 pins in a line instead of in a square block, so there are some minor harness changes needed. Dan

Hi Andre, there are some rom hacks to do this for you if you want to go that way? I've tried them and they work perfectly. Dan

Hi, now that you get something on the screen have you tried putting it into test mode again? Might be something from the displayed diagnostics to point where the problem is. Cheers, Dan

Only ever seen this caused by a bad pokey. Throw another known worker in there and I suspect you'll have lots of random rocks again :) Dan

Pokeys are used to generate randomness on other Atari boards so I'd look at them (I think there are two on SD boards) first. Dan