Super Famicom Tv board help

UndeadPastaUndeadPasta
in Help Wanted!
So I got a Sharp SF-1 super cheap recently, but there is no image when I put a game in but the television part work fine. The sound plays fine for both the console and the TV part. I took it apart and finally got to the famicom board, and I am pretty sure I see the problem. There is obvious corrosion on one side, and im not really sure howhat to go about fixing it. I don't know if this board is different from other famicom boards, but I thought someone here could give me a hand. If worse comes to worse I didn't spend that much on the unit, but I would REALLY like to fix it. The brows gunk seems to be directly underneath 2 capacitors, so I'm assuming one or both of the capacitors leaks and caused the corrosion underneath and I may have to resolder a lead or 2. Either way I just want to know what you guys think!

I will attach pictures below.

Comments

  • dewisp02dewisp02
    If that is corrosion, you will want to clean it up and neutralize it so it does not continue to spread. There are lots of arcade pcb articles covering instructions on how to do that. I would suggest desoldering all the affected components, neutralize the area, replace any caps on the pcb as maintenance, and resoldering the other components back on. It would not be something for a person new to soldering since they are surface mount components. 



    Do you see anything on the tube at any time? Like when the famicom is turned off? It could be a tube/monitor chassis problem. What part of Michigan are you located?
  • UndeadPastaUndeadPasta
    I know how to solder but I don't think I could do that without ruining it. When I had the TV together it would show static and a channel number. When I turned the sfc part on it would switch to a black screen, but it would show a Japanese character in the corner letting you know it was on the game mode. There is an external out port just like on a normal sfc and when I plugged it into my other TV I got the same result: no picture, only sound.

    I am located in the upper Peninsula of michigan. If you or someone you know could help me fix this it would be greatly appreciated!!!
  • UndeadPastaUndeadPasta
    I just cleaned up the part that had the gunk all over, and im not sure if I can see any broken traces. If anyone can let me know that would be awesome!
  • PikkonPikkon
    Think I see some broken traces where the jump wire is.



    Can you post some hi res pics of that area.
  • UndeadPastaUndeadPasta
    Here is a couple more pics. I tried replacing the caps but no dice, still no image. I'm still very new to soldering so I may have done it wrong but I put it back together already and I'll try to work on it again on tuesday. If you guys find that it is a broken lead or something, I would be willing to ship it and pay someone to have it fixed more professionaly. I'm kinda out of my league here haha.
  • BrachabreBrachabre
    Can't give much direct help since your issue goes beyond my repair experience, but I have two really good videos to share that may help you troubleshoot.



    IMO, this guy's a beast for troubleshooting PCBs. I watch his vids constantly and have learned a lot. He does a great job repairing some intricate parts like transistors and tiny traces.



    PCB solder pad/transistor repair:

    https://www.youtube.com/watch?v=vx50YtEC2S8



    Identifying corrosive areas on a PCB with UV blacklight technique.  

    https://www.youtube.com/watch?v=g0qTOLBhlVs
  • UndeadPastaUndeadPasta
    Thanks for the help everyone. I definitely think this is out of my league so I'll try to see if I can have someone professionally repair it.
  • PikkonPikkon
    Thing is you can send the board off to someone but then they wont be able to test it.
  • UndeadPastaUndeadPasta
    Yeah I know :/



    I also don't really have any other options haha.



    I'm assuming they can use a multimeter or something to check if there are any problems (which I can only assume there are) and fix anything they find. If for some reason it comes back and it still doesn't work, I'll give it another once over to see if it's anything else. If i STILL don't find anything, I'll just fit a SNES PCB in there somehow haha.
  • CZroeCZroe
    Originally posted by: Brachabre



    Can't give much direct help since your issue goes beyond my repair experience, but I have two really good videos to share that may help you troubleshoot.



    IMO, this guy's a beast for troubleshooting PCBs. I watch his vids constantly and have learned a lot. He does a great job repairing some intricate parts like transistors and tiny traces.



    PCB solder pad/transistor repair:

     

    allowfullscreen="" frameborder="0" height="280" src="https://www.youtube.com/embed/vx50YtEC2S8" width="500">>








    Identifying corrosive areas on a PCB with UV blacklight technique.  

     

    allowfullscreen="" frameborder="0" height="280" src="https://www.youtube.com/embed/g0qTOLBhlVs" width="500">>





    Thanks for those links. I already learned a lot! OP: perhaps you should send it to this guy?

     
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