Pole Position II down with a case of pink eye

mclemore

Administrator
Staff member

Donor 15 years: 2010-2024
Joined
Apr 3, 2001
Messages
5,360
Reaction score
1,940
Location
Pasadena, California
I have a Pole Position II on location at our Museum exhibition. When I got it it already had extra power jumpers to different points on the board, and an extra fan on the board. I changed out a dead NVRAM and faulty opto controller and checked voltages. It's been 100% well behaved without any issues at all until the last 2 1/2 months... until now.

Now it's dead... showing just angled pink lines on the screen. I nor anyone else has shown up there to look at it yet, but I thought I'd post and ask the world's best resource on what I am most likely dealing with....

Thanks in advance for any advise. Pole Position II - Pink Eye - 250828.jpg
 

Attachments

  • Pole Position II - Down - 250828.jpeg
    Pole Position II - Down - 250828.jpeg
    544.6 KB · Views: 12
So what causes that type of display on the monitor?

It turns out...

The PCB and monitor were fine...

It was the only modern part in the machine that went bad... the switching power supply...
 
So what causes that type of display on the monitor?

It turns out...

The PCB and monitor were fine...

It was the only modern part in the machine that went bad... the switching power supply...
what kind of power supply were you using? it should be the AT style 200W PowerPro. and I don't recommend quick disconnects on the test points because the solder to said test points are kind of junk. I sand open the traces and solder the wires to the exposed copper. it looks ugly, but that's how I've done it for years and it works.
 
Thanks. That's a very good point. Once I heard it was up, it was out of mind on a busy day. I was just happy it was running again going into a major holiday weekend for the museum.

PP is a hungry beast. I need to ask the tech if he restored the connections to the test points at all, and also, what power supply he had on hand. It likely was underpowered to begin with, and I wouldn't be surprised if he used a 100w/110w 15/16A

Of all issues I've had while the machines have been on location, the majority of them have been power related...
 
I did luck out that it was simple.

I talked to the tech. He didn't tamper with any of the power connections going to the test points (good).

@mecha It turns out the switching power supply that died was a 12A unit, and was reportedly replaced with a 16A Happ (though I suspect it is actually a 15A Happ). In any case, it's more robust than what was in there before and should work for now. Next time I'm on site I'll take a closer look at at.
 
Back
Top Bottom