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OSSC Overheating issue?

Home Forums OSSC OSSC – DIY Kit support OSSC Overheating issue?

This topic contains 2 replies, has 2 voices, and was last updated by  Techytom 6 months, 4 weeks ago.

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  • #7695

    Techytom
    Participant

    So I had ordered one of the DIY kits from the first v1.3 batch and put it together over the course of 1 week, after stupidly losing 7 .1 uF capacitors @_@ and to my amazement it worked fine as soon as I plugged it in. It’s been working fine when left in a cool, well airated area, but every now and then the OSSC would flicker on and then off, and after ~8 hours of testing it would just turn off and I would have to wait for it to cool down after a night of sitting. The only problem I had when wiring everything up was with the 2 LEDS, I believe I fried one of them when trying to desolder the LED, because I thought I put the red one where the green one belonged, and I only every see the green LED go on. (Which I believe is the left LED if your facing the screen but cannot check atm)

    So my question is could the LED fudgeup be causing some issues, or should I try to resolder the SMD chips with more solder paste for the heatsink? Any insight would be greatly appreciated!

    #7697

    marqs
    Participant

    Depending on ambient temperature and which input mode you have active (e.g. 240p or 1080p), TVP7002 chip might get quite hot. It shouldn’t be a problem if the bottom ground pad is soldered down well, but I included a 14x14mm heatsink with adhesive tape on v1.5 kits to be taped on top of TVP7002 just to be sure. You might want to get something similar locally and see if that helps. There’s also a 3.3V regulator behind the display which runs warm, but it should stand quite high temperature before automatically shutting down.

    A weak joint on some FPGA pins could also cause that behaviour, so that’s another thing to try if previous solutions won’t help. LEDs shouldn’t affect this issue.

    #7716

    Techytom
    Participant

    Thanks for the input! I ended up reflowing the solder from the underside of the FPGA and TVP7002 and ended up resoldering the FPGA pins and was happy to see that the OSSC had a much lowering operating temperature and was fine for ~8+ hours of testing the other day! :3

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