| Arcade Collecting > Restorations & repair |
| Atari Centipede Cocktail table game has no power |
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| vapuser:
Good morning all. Above parts have now been ordered, except for the flyback. I’ll probably order that part when I return from vacation. Has anybody seen or come across any videos on the circuit modifications that are necessary when using a flyback for a 19” monitor? I’m curious as to the extent of this endeavor. With my vacation quickly approaching and the additional work required on this monitor circuitry, my forum communications will be limited. The next time I turn this game on, all the new parts will be in place and hopefully I’ll just need to make minor adjustments. Thanks again for everyone’s suggestions and support. :) |
| bperkins01:
Its going to be pretty difficult to help fix a CRT via a forum... Were you able to test the horizontal output transistor? Do you have a visible crack and leaking from the flyback? I've only seen the picture from above.. you can remove that now and check all around it.. Replacing everything can make things worse w/o knowing if these are the only two issues.. |
| vapuser:
Good morning Perkins, Yes, I was able to test the horizontal output transistor and it is bad. I believe it had a reading of .002. I believe it's shorted out. As far as the flyback is concerned, there is no visible signs of damage. No visible cracks or leaking. Other than being dirty, it looks good. When you say that "I can remove that now", do you mean that I could de-solder the flyback from the board now? If you think it will help, I can take more pictures of the flyback from different angles. Those parts I ordered should be here any day now. For sure I need to replace the H/Out. What do you think? |
| bperkins01:
My flyback is bolted on so its easy to remove and inspect the area I can't see. If there are no VISIBLE cracks and leaks on your flyback, I'd put the horizontal output transistor in and try it that way. Whats the worse thing that can happen? You blow a $4 part? You already know its bad and its the #1 part that fails.. If the flyback is soldered to the board and there is the potential for a crack/leak on the underside of it that isn't visible.. Remove it and be sure. If its clean, I'd put it back and test it with the new transistor. Their *normal* failure is overheat, crack, melt, eject goo... If none of that is happening.. why replace it? Install the transistor - 10 minutes work and see if progress is made. |
| yotsuya:
--- Quote from: bperkins01 on March 17, 2020, 10:46:54 am ---If there are no VISIBLE cracks and leaks on your flyback, I'd put the horizontal output transistor in and try it that way. Whats the worse thing that can happen? You blow a $4 part? You already know its bad and its the #1 part that fails.. Install the transistor - 10 minutes work and see if progress is made. --- End quote --- That’s why I usually get multiples of any chip, IC, or transistors I order, if possible. You never know.... |
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