DLP4500: Stopped working after using to much voltage

Hello Daniel,

Welcome to the E2E forums and we hope to assist you with your questions. 

So when you tried out a 12v power supply was it not able to power on? What current amp rating was your 12v power supply?

There is normally a green heartbeat sensor do you see these LEDs on?

You can also see if you can access and probe the pwrgood signals out of the regulators. You can check the the reference design schematic and look at the power management section.

www.ti.com/.../DLP4500-C350REF

Thanks,

Alex Chan

Dear Alex,

I hope you are doing very well. Thanks for your reply. I am also facing the same problem. I gave 24 V power to the DLP 4500, and now it is short-circuited. I know you have given a step to solve it, but it literally does not work. Once connected to the projector, the power supply immediately stops the power it supplies. 

Can you please let me know how I can solve this issue, or maybe suggest some parts of the projector that I can use to replace and try? I will appreciate your help here.

Thanks and Regards,
Prajwal

Hello Prajwal,

Have you tried probing the power rails and regulator inputs and outputs to check the voltages? That would be the first step to try to narrow down where in the power supply chain there is an issue. 

Regards,

Alex Chan

Dear Alex,

Thank you very much for your reply. While checking the same, we cannot measure it properly as the 12V Power connector is not showing any output, limiting us from checking the power in other rails and regulators. 

I am looking forward to your reply. Maybe if we can a particular component of the board or the whole PCB board and then replace the part or the board itself, that would be great as well. Or else we can send it for repair to the technical team and in the meantime you can send us the replacement.

Thanks again.

With warm regards,

Prajwal.