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shear_xear

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Everything posted by shear_xear

  1. It’s the third “dead” 7800 I’ve been able to revive this week. Definitely the one I’ve had for the longest, and one with the expansion port to boot!
  2. I checked continuity to pin ten and that was good so I replaced the diode and voila! Everything works perfectly. Thanks for all the help!
  3. Awesome. I will check out the diode and capacitor. Hopefully it’s one of those. Thanks!
  4. Hate to bring this one back up again, but I dragged this one back out to see what I can find. What I found was that when checking continuity with pin three on the right player controller jack (the one that would pull left automatically) it showed continuity with pin one of the RIOT (ground). As I can’t see how pin three runs out to the RIOT (there is no trace that I can find) any hints where I might look to fix this? Thanks!
  5. Yes, sorry, the transistor. Actually I rechecked and now it is 12v powered off and 10v powered on. The power supply is a C0244471 with the silver label on it. Like I said before though the same psu is giving me right around 9v on every other 7800 board.
  6. So I replaced the 4013 and that did nothing to remedy the problem, but then I swapped out the transformer next to the power jack (with the circular opening) and the system now powers on and off correctly. It is still getting 12v when powered on at the jack and the 2200uf cap and power regulator, but the regulator drops it down to 5v, and all of the ICs showed 5v as well. Will this damage the console or wear the PR out, or can the board handle this? Thanks!
  7. Oh, and I got right at 9v in and 5v out at the regulator on the other boards...
  8. I will look at the 4013. The power supply gives me right around 9v on every other board I tested it on last night, which was about six as I’m going through all my “bad” boards with a UAV to see if I can get them going again. Thanks!!
  9. Hi everyone. I have an Atari 7800 that I picked up awhile ago that wouldn’t turn on. I replaced the power switch and once plugged in it turns on and won’t turn off. It is also showing that it’s taking in 12.5v or so when normally I see right around 9v. I was wondering what could be causing this. Anyone ever see this before? Thanks!
  10. Hi everyone. I have a SNES that I picked up and it works, but unfortunately there is some sort of interference on the screen. Has anyone ever seen this before and know how to eliminate this? The attached picture was taken off a CRT. BTW, I am using an OEM power supply that works perfectly with my original SNES. Thanks!
  11. I just installed a different 7805 and now everything is working perfectly. I’m not exactly sure why the other new pr was giving me problems, but it’s all looking good now. Thanks!!
  12. I’m getting the same 2v on the middle rail. How to I verify the 4013 is working correctly?
  13. So FB2 is right around 10v and the transistor I swapped from another board. Both times (before and after the swap) it was about 10.4v in and 9v out.
  14. Actually both power supplies I have on three 7800s all show 10v in. The working two have 5v out.
  15. Also, the power regulator and three caps have been replaced (along with the power button switch.
  16. Hi everyone. I have an Atari 7800 that is giving me a dim LED and only 2.3ish v out of the power regulator (with close to 10 going in). Anyone have any ideas about where the problem might be? Thanks!
  17. Thanks for the pointers! I will check it out with my multimeter.
  18. Hi everyone. So I have an Atari 400 with a C017945 power supply, and I am getting what looks like interference on the screen, similar to what I have seen when the amps are off on a power supply. I thought that this was the correct power supply for the 400. Is that wrong? Thanks!
  19. So I decided to just run the lines directly to the TIA and now everything looks perfect. I haven’t tested the S-Video output yet, but this seems to work out a lot better than the picture version C approach.
  20. Here is the color going into the T.COL instead.
  21. Here is the same tv displaying Pitfall via composite from a 4 Switch I did. I believe the T. COL is only for the 7800, and not used with the 2600. I did not use it when I installed the UAV on the 4 switch.
  22. Hi. Here are pictures of what I have so far. Lifted pin 6 (checked without it lifted and got only black and white and crazy lines when in color mode). The background green is super light compared with the usual green you’d get. Thanks!
  23. What do you mean by “look at the silkscreen”? As for the last step, I think I found the 47pf cap, but where is BLANK coming from? I can’t locate an 820 ohm resistor; where on the board would this be? Thanks!
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