DLP4500: DLP4500 TRIG_IN_1 not working anymore

Mattia Gabbrielli

Part Number: DLP4500

Hi,

we are currently working with a DLP4500 EVM with firmware version 3.1.0 on it.

We successfully upload a pattern sequence and we configure an external trigger in order to change the displayed pattern without clearing the DMD after the exposure. This setup has been working for a while, but now it seems impossible to trigger the sequence again. We measure the voltage at the DLP input and it is about 3 V; accordingly to the related jumper which are shorted at the middle pins.

How can we understand if it is an HW problem and/or if any configuration is wrong? Can we evalutate from GUI if the DLP get the correct Pin state?

Thank you in advance.

Regards,

Mattia

over 5 years ago

0 Kyle Rakos over 5 years ago

TI__Mastermind 20045 points

Hello Mattia,

Sorry to hear about the issue. Could you detail if there have been any other changes since it was last working (either software or hardware)? You could also try reflashing the firmware in the off chance something got corrupted. Are the other pattern modes working by chance?

Thanks,
Kyle

0 Mattia Gabbrielli over 5 years ago in reply to Kyle Rakos

Prodigy 70 points

Hello Kyle,

thank for your answer. I have already tried to reflash the firmware without any success. What do you mean for "pattern modes"? In video mode, with HDMI, the DLP works correctly.
I also tried to use the TRIG_IN_2 input and it works.

0 Hirak Biswas over 5 years ago in reply to Mattia Gabbrielli

TI__Genius 10925 points

Hi Mattia,

Are you running in Pattern Sequence mode or Video Mode?

Thanks & Regards,
Hirak.

0 Mattia Gabbrielli over 5 years ago in reply to Hirak Biswas

Prodigy 70 points

Hi Hirak,
when we try the trigger, we run in Pattern sequence mode.

0 Hirak Biswas over 5 years ago in reply to Mattia Gabbrielli

TI__Genius 10925 points

Hi, Kindly wait for some days , we are looking at this issue.

THanks & Regards,
Hirak.

0 Hirak Biswas over 5 years ago in reply to Hirak Biswas

TI__Genius 10925 points

Hi Mattia,

Could you kindly try with a different PC/ Different Lightcrafter 4500 EVM and see if the problem persists? Kindly make sure to set the trigger to "external positive" BEFORE adding the patterns in pattern sequence mode.

Thanks & Regards,
Hirak.

0 Hirak Biswas over 5 years ago in reply to Hirak Biswas

TI__Genius 10925 points

Hi, do you still need the answer to your question? We are tentatively closing this thread. You can re open anytime.

Thanks & Regards,
Hirak.

0 Mattia Gabbrielli over 5 years ago in reply to Hirak Biswas

Prodigy 70 points

Thank you for your answers, I'm going to try your advices asap. In the meanwhile you can close the thread.

Regards,

Mattia

0 Hirak Biswas over 5 years ago in reply to Mattia Gabbrielli

TI__Genius 10925 points

Hi Mattia,

Thanks for contacting DLP Forums, Have a great day!

Regards,
Hirak.

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DLP4500: DLP4500 TRIG_IN_1 not working anymore