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DLP3010EVM-LC: After removing the DMD, it was put back on, but it could not be turned on

jie chen
Prodigy 30 points
Part Number: DLP3010EVM-LC

My experiment required the DMD to be illuminated by a laser, so I removed the DMD of the DLP3010EVM-LC, which is the DLP3010LCFQK, and placed it on the fixed device (this has a similar structure to the original position of the DMD, which is 3D printed). The driver board and system board of DLP3010EVM-LC are used for control (the original LED connection and electric fan connection are removed). It worked before, as shown in Figure 1 and 2, and you can see the DMD display image on Figure 2.

But after one reinstallation of the DMD, I found that it was no longer displaying images. Not even if I put the DMD back into the original DLP3010EVM-LC. When I turn off the switch sw1, D1 and D2 are ON; Turn on sw1, D1 and D3 are ON, and D2 keeps flashing, as shown in Figure 3 and 4, sw1 ON, and D2 keeps flashing.

I thought the DMD was broken, because I noticed that its surface was different from the smooth mirror surface at first, as shown in Figure 5.

However, I bought a new piece of DLP3010LCFQK, and it won't display the first time I put it on, and its surface is no longer smooth mirror too，as shown in Figure 6.

When I connect DLP EVM GUI 3.1.0.7 via USB and then open sw1, EVM status shows 'Connected, Powered Off'.


I have updated the firmware as suggested by the customer service (follow the steps in dlpu112.pdf), but the issue still persists.
I don't know what the problem is, is the DMD damaged, or some other part of the hardware problem?

Is there a solution?

Thank you!

  • 0
    TI__Expert 3905 points

    Hello Jie,

    Welcome to the E2E forum. Thank you for your business!

    Both DMDs became damaged when you reinstalled it. A damaged DMD would display the fuzzy images you saw. It is not recommended to remove the DMD from the EVM as it is very easily damaged.

    Best,

    Maxine

  • 0 in reply to Maxine Cabrasawan
    Prodigy 30 points

    Thank you for your answer.

    So is it just DMD? What about the other parts? If I want to continue using my existing EVM instead of replacing it with a new one (which is more expensive), I still need to replace it with a new DMD. As I said before, despite all my care, I still had problems the first time I installed the second DMD. In this process, could you please tell me what should be paid attention to?How to avoid the damage of DMD? Maybe I have neglected some parts before.

    All the best.

  • +1 in reply to jie chen
    TI__Expert 3905 points

    Hello Jie,

    I would also check the DMD interposer for damage. You do not have to replace the EVM if the interposer is not damaged. You can avoid damage to the DMD by ensuring that the DMD and the interposer are fully connected. This connection is very precise and quite delicate, so any misalignment will cause issues. Take care to remove all ESD from your environment.

    Best,

    Maxine

  • 0 in reply to Maxine Cabrasawan
    Prodigy 30 points

     Hello Maxine,

    Thank you very much. I have one more question, and it would be great if you could answer. I actually have another damaged DMD, and you can see periodic stripes on its surface, seven in all. And on one of the pictures I sent out earlier of the damaged DMDs, you can't see this stripe. Are these two different causes of damage? Physical stress or incomplete connection to interposer?

    All the best.

  • 0 in reply to Maxine Cabrasawan
    Prodigy 30 points

    Hello Maxine,

    Could you provide the part number of this interposer so that I can try to buy a new one?

    Best Regards.

  • 0 in reply to Maxine Cabrasawan
    Prodigy 30 points

     Hello Maxine,

    I replaced the new DMD again, but the problem persists. This time I made sure that it was fully connected, the surface of the DMD did not blur or have any stripes, when I turned on sw1, the DMD did not look any different to me, D2 kept flashing as you can see in the video. When I connect the GUI and open sw1, EVM status shows 'Connected, Powered Off'. I am confused and don't know where the problem is.

    Best Regards.

  • 0 in reply to jie chen
    TI__Expert 3905 points

    Hello Jie,

    Since the DMD is so delicate, the cause of the damage could be physical, such as ESD, the result of damaged connections with the interposer, or both. It is very hard to say without seeing your system. The interposer is a TI part and not sold separately from our EVMs.

    Please try re-flashing the EVM with the DLP3010EVM-LC-FW firmware image available on the EVM product page. Do so with power connected to the EVM, but without turning the switch on.

    Best,

    Maxine

  • 0 in reply to Maxine Cabrasawan
    Prodigy 30 points

    Hello Maxine,

    www.ti.com.cn/.../dlpu112.pdf

    Thanks for your reply. I followed the steps on page 6 of the manual to re-flash the EVM, but it did not work.

    I actually have two EVMs, and I found that connecting the 'damaged DMD' to their respective driver and system boards made a difference. One is like in the video I posted earlier, the D2 keeps flashing and the DMD doesn't respond. The other is that DMD is also flashing while D2 is flashing.

    It's hard to tell what the problem is without seeing my system, and I understand that. Could this be due to damage to the driver board and system board? And I'm wondering, in my system, using the driver board to connect to the DMD without the LED connection, could this cause damage?

    Best Regards.

    Jie

  • 0 in reply to jie chen
    TI__Genius 12785 points

    Hello Jie,

    Your DMDs are damaged and preventing your system from initializing. The DLPC is attempting to complete it's boot process, but the DMDs are failing the initial check. This results in the RESETz signal to be tripped causing the boot process to start over again. This reset signal is displayed with D2.

    You have the option of ordering new DLP3010LC DMDs to replace the faulty ones. However, given that we do not know the cause of the damage to the DMD it is likely that this same occurrence will happen once the DMDs are replaced if attached to the same custom hardware.

    There should not be an issue controlling a DMD without LED connection supposing that LEDs are still connected to the EVM. If there are no LED's connected to the EVM, it will not boot but it will not cause the damage we are seeing to your DMDs.

    Regards,

    Austin

  • 0 in reply to Austin Snyder
    Prodigy 30 points

    Dear Austin,

    I was using the driver board to control the DMD without LED connection, the DMD was able to display images until it damaged, this doesn't damage the DMD or the driver board or the system board, right?

    Best Regards.

  • 0 in reply to jie chen
    TI__Expert 8810 points

    Hello Jie,

    Since we do not know the cause of the damage to the DMD, it's hard to tell if the driver board or system board got damaged. I would suggest you inspect the hardware to avoid damaging another DMD.

    Regards,

    Lori