| Arcade Collecting > Restorations & repair |
| Atari Centipede Cocktail table game has no power |
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| bperkins01:
hmmmm.. Again - hard to tell over the internet.. It kinda sounds like you have a chip that has a thermal problem on the pcb...and its taking out the video.. Start it up and start touching the chips on the PCB - if any are too hot to touch for more that a couple seconds - that could be your issue. the video output chips are at A8, A9, C8, K4, B7 - but any one on the board could be the cause. Once it happens, switch to test mode and see if the machine is beeping/resetting. However - there is also a circuit on the monitor that is called the 'x-ray' protector. Its job is to prevent over voltage from the flyback that will cause your crt to emit xrays.. normally I wouldn't even consider this - except - you had to sub in a flyback that was not meant for that crt if I remember correctly It is supposed to kick in immediately too - not after 10-15 seconds Maybe its involved? - I've only read about this - but its a real thing.. Maybe that will help narrow the cause. |
| vapuser:
Perkins, do you know what's puzzling to me, is that I thought the image on the screen would now be a different size. As you recalled, I have a 13" monitor and the flyback if for a 19" monitor. Maybe, when the tube starts to heat up, after 40 seconds it tries to resize the screen according to the new flyback. But instead of resizing, it just goes black. Does that make any sense? Or should it immediately resize according to the new flyback? At any rate, when I first turn the game on, the picture looks like the original size (for 40 seconds). I wonder if I could send a short one-minute video of what is going on. Do you know if this website has the capability of playing videos? Would it help for you to see what is being displayed on the monitor? What are your thoughts? |
| Mike A:
There are modifications that need to be made when you use that flyback. Did you do that or did you just swap the new one in? |
| bperkins01:
If the video is small enough in size - you can upload it - otherwise publish it Youtube and put a link here. More people looking at it will help. The tube doesn't resize the picture - it just displays the signal it gets (when working properly). The same way you can watch TV on your phone or on a 70" LED screen. The flyback for a 19" monitor on a 13" tube w/o any adjustments to compensate doesn't seem like it should work. Did you reflow the edge connectors on the boards in the monitor? A bad solder joint could cause the video to go out too.. :dunno |
| Mike A:
There seems to be a lot of confusion surrounding that flyback. There are people that say it works fine, and others say it does not work. Others say there is a cap that needs to be changed, but that is just to get the correct image width. It sounds like a thermal problem but that is just a wild guess. Does the game still coin up and play when the monitor goes dark? I apologize if you already mentioned this. I have been vacuuming up water in my basement all night and I had to quit that to go to work this morning. My brain is a bit fried. |
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