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Power not working

Christine Swisher44
Intellectual 280 points
Other Parts Discussed in Thread: MSP430F2232

Everything was working great this past week. But then when we tried to turn on the DLP the light flashed but it did not turn on. It appeared at there was something wrong with the power. We have had a lot of trouble with this component in the past due to the fragility of the connector and stress on it. So, we then made a new connector for power at J11. We noticed a bit of dark liquid on MSP430F2232. Also, a bit on the trigger Pin 4. We are sending a 3.3TTL output trigger to a camera but just with Pins 1 and 3. 

I'm not sure when this problem started (ie before or after the connector at J11). Any ideas of what is going on? 

Thanks so much for your help!

Christine

  • 0
    TI__Expert 6370 points
    Hello Christine,

    I am assuming you are still working with the LightCrafter? I am going to transfer this question into that thread, where we can get you a full answer.

    In the meantime, do you know where in your system the "dark liquid" could have originated? Is it possible that it shorted your board?

    Best regards,
    Trevor
  • 0 in reply to Trevor Dowd
    Intellectual 280 points

    Thanks Trevor!

    Unfortunately, the problem occured when I was not around so I am not 100% sure what happened. However, the damage appears to be at pin 4 on the J11 connector, at C115, and possibly some damage on the microcontroller (MSP430F2232) only. My guess is that there was something wrong with the output trigger. Although, it sounds like MSP430 controls the LED driver and such. So that is less clear. 

    Certainly, a short seems like a good explanation. Maybe pin 3 and pin 4 on J11 touched by chance. Another possible hypothesis is that the output trigger has limitations that were exceeded. Is there any documentation on this? I checked that R295 was shorted and switched the 0ohm resistor from R291 to R292 for 3.3V TTL. Also, I use a fan to prevent overheating.

    Assuming it is the microcontroller that is broken, if I replace it would I have a shot at repairing the system? What does the microcontroller control on this system? Also, what component is at C115. It may need to be replaced as well. Thanks so much for your help!

    Best,

    Christine