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DLPDLCR230NPEVM: DLPDLCR230NPEVM

Ahmet canoglu
Prodigy 10 points
Part Number: DLPDLCR230NPEVM
Other Parts Discussed in Thread: DLPC3436

Tool/software:

Dear Sir/Madam,

I have a DLPDLCR230NPEVM module in my possession. Based on my research in various forums, I learned that when the module is powered on without being connected to any device, it should project the "DLP" logo on the screen. However, when I power the module by itself, the "DLP" logo appears for a very short time (approximately 0.1 seconds) and then disappears immediately. This behavior keeps repeating—the text constantly appears and disappears, and I cannot obtain a stable image. Is this behavior normal? Could you please inform me about what kind of image should be displayed when the module operates independently without any external connections?

Additionally, I have noticed an unusual situation with the power supply. I am powering the module with 5V 4A, but when running, the current draw fluctuates rapidly between 0.2A and 0.6A. Is this current variation normal? If there is an issue, I would appreciate your guidance on how to resolve it.

I am also sharing photos to show the setup of my power supply and connections.

Thank you in advance for your support.

Best regards,
Ahmet

  • 0
    TI__Expert 7035 points

    Hello user,

    Is the unit just cycling between the DLP logo screen and powering off. There are status LEDs on the unit. Are any of the status lights flickering? Is the barrel jack already plugged into the EVM when the power supply is turned of?

    Best,

    John

  • 0 in reply to John McKnight
    Prodigy 10 points

    You can check how the DLP responds from the video file I shared; one of the LEDs is flickering, the middle LED.6507.dlp video.rar

  • 0 in reply to Ahmet canoglu
    TI__Expert 7035 points

    Hello User,

    Can you chare a O-scope image of TP2 on the EVM? Does is stay high? Can you also check the voltage of Pin 1 on U8? This IC is above and to the left of the FPGA if you have the unit pointed towards the wall.

    With AC/DC wall adapter we have seen 5V supplies run a little low and cause powerup issues. Maybe boosting the voltage to ~5.2 may help.

    Best Regards,

    John

  • 0 in reply to John McKnight
    Prodigy 10 points

    Hello,

    Thank you for your suggestions. I followed your instructions:
    • I probed TP2 with the oscilloscope and captured the signal (please find the attached image).
    • I checked the voltage on Pin 1 of U8 as well.
    • I also increased the supply voltage to 5.2V as recommended.

    Unfortunately, none of these actions resolved the issue. The board still does not power up or show any signs of improvement.

    Please let me know if there are any other steps I could try.

  • 0 in reply to Ahmet canoglu
    TI__Expert 7035 points

    Looking at the image, The O-scope is not on TP2. This is just the header for the ribbon cable. If the projector is facing forward above the head and to the left there is the DLPC3436 controller. There should be a silk screen called TP2 on the board. I need that signal to be read from.

    For the Pin 1 of  U8, can you share what voltage was seen on this pin? It is unclear to me if this is 1.8V or 0V on your system.

    Thank you,

    John