Just picked up an E&tPM, need a little help...

keithsarcade

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Game is working, but the score displays are either burning out or not getting enough power (I'm hoping it's the latter). Also most of the general illumination lighting isnt working, mainly behind the backglass & coin door lamps.

Havent done any deep diagnosing yet, been too busy cleaning & playing it. I have checked all fuses & connectors, everything there checks out. Any suggestions?
 

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Since it looks like the displays are trying to work and no fuses are blowing, the first thing I'd suspect are R1 and R4, the 39k ohm resistors on the power supply. Measure your voltages (-100v, +100v), and measure the resistance of the resistors. If the voltage is low, you have a problem in the HV section of the power supply. If the resistors measure low, you've most likely found the problem.

There is a good writeup of what can cause problems with System 11 displays at Pinwiki.com:
http://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Display_problems
 
Since it looks like the displays are trying to work and no fuses are blowing, the first thing I'd suspect are R1 and R4, the 39k ohm resistors on the power supply. Measure your voltages (-100v, +100v), and measure the resistance of the resistors. If the voltage is low, you have a problem in the HV section of the power supply. If the resistors measure low, you've most likely found the problem.

There is a good writeup of what can cause problems with System 11 displays at Pinwiki.com:
http://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Display_problems

Ill be replacing those resistors. By the time I pull legs to read them, might as well. Its getting 105v. As far as the GI, seems a typical culprit from my research is the interconnect PCB. Ill look into it.
 
Also check the ribbon cable in addition to what others have posted. I've had display problems caused by crinkled ribbon cables before.

and since other people are doing it... I'll trade you my police force for your elvira as is! :)

-BB
 
Looking for these parts, anyone got any leads?
 

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Yeah, I know, but I dont need to spend that much just to replace 2 plastics that I can get by with anyway. I'm mainly after the chrome strip on top of the backbox, and if I can find a good price on those 2 plastics then Ill bite.
 
Looking for these parts, anyone got any leads?

Common failure parts that can be individually found on eBay.

Display problem is the power supply in the +/- 100vdc section.

GI problem is most likely burnt up headers and connectors on the backbox interconnect board at J6 and or J7.
 
Get out your molex crimper, connectors and pins. Repin the GI connectors and header pins. That will hopefully get your GI back again. Give a good look at your display connectors and may have to do similar work there as well. EATPM got the hell played out of them in the arcade.

I had similar issues with the game I bought from a local op/friend. Picked up both EATPM and SS in a combo deal. Had to buy both to get either one.

- Don

http://gallery.me.com/dlhensonjr#100502

DSC_0017.jpg



Game is working, but the score displays are either burning out or not getting enough power (I'm hoping it's the latter). Also most of the general illumination lighting isnt working, mainly behind the backglass & coin door lamps.

Havent done any deep diagnosing yet, been too busy cleaning & playing it. I have checked all fuses & connectors, everything there checks out. Any suggestions?
 
Replaced R1 & R4, still having the same display problems. It's getting 105v. Anything else I can try?

You've knocked one potential culprit off the list, and even if the resistors weren't the problem it is good that you replaced them.

You are aware that there is both a +100 and -100 section of the high voltage power supply, right? Your +100 could be fine and at +105, but if the -100 is low your displays aren't going to work.

Pinwiki has a pretty good write up on where to look for the problem:
http://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Display_problems
 
GI is fixed, and seems the display's have a tiny bit more life after replacing the GI pin's & connector. Displays are still having issues. Power supply is getting 105.9v both + and -. Any test points on the displays? Any other companents that may be causing this? Or is it more likely my displays are just bad?
 
Hmm, 105.9 seems a little on the high side. But not crazy. Do they still look like they did in your first picture? If you do a display test, do all the segments try and light?
 
They still look the same. I havent been able to do much in test mode because I can't really read the displays. They try to light up more when theres alot to display. For example, if your playing a 1P game, you wont see the 1P score at all unless there's more for the display to light up elsewhere. Also, the LH display seems worse than the RH display.
 
They still look the same. I havent been able to do much in test mode because I can't really read the displays. They try to light up more when theres alot to display. For example, if your playing a 1P game, you wont see the 1P score at all unless there's more for the display to light up elsewhere. Also, the LH display seems worse than the RH display.

Has there been any previous work done to the power supply? Have you tried swapping displays to see if the problem follows the display? (I.e. the LH one looking worse than the right.)
 
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