DLPC350: Light Crafter 4500 EVM doesn't connect via USB, RED LED on back

xi lee

Part Number: DLPC350

Hi.

I have the LightCrafter 4500 evaluation boar, and have been using it successfully for a while, but today, I can't connect with pc. Having the same problem as,

https://e2e.ti.com/support/dlp__mems_micro-electro-mechanical_systems/advanced_light_control/f/924/t/651321

Light Crafter 4500 EVM doesn't connect via USB, RED LED on back. The fan on the rear of the device can't work, no turning. The main chip dlp on top was very heat, and Projection image on the wall is red stripe.

Something wrong?

Thanks.

Ximin Lee.

over 7 years ago

0 Philippe Dollo over 7 years ago

TI__Mastermind 28005 points

Xi,

Welcome to the E2E forums and thanks for your interest in our DLP technology.

You should be using a 12-V power supply with at least 7A. The bottom LED remains red when the power-up signals are not ready (specifically it checks the TPS65251RHAR buck regulator, 3.3V, 2.5V, and 1.8V lines). The green top LED is the heartbeat LED. If it's not booting up I don't think the controller ever boots. Please confirm your electrical setup.

Best Regards,
Philippe Dollo

0 xi lee over 7 years ago in reply to Philippe Dollo

Prodigy 35 points

Philippe,

I checked c71, and c184 with multimeter, the c71 3.3v, c184 1.8v is Short circuit.

Thanks

Ximin Lee

0 Philippe Dollo over 7 years ago in reply to xi lee

TI__Mastermind 28005 points

Xi,

Thanks for your input. Since you have resolved the issue, I will mark this thread as resolved.

Best Regards,
Philippe Dollo

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DLPC350: Light Crafter 4500 EVM doesn't connect via USB, RED LED on back