DLP670S: VOFFSET, VRESET, and VBIAS stay almot 0 voltage

Hi Hide-san,

I will assign a colleague this ticket, as they can give you a better answer.

May we get some initial information, however?

• Please take a picture of your set up and a close-up of your DLPLCRC900DEVM (which I will refer to your DLPC900 board/controller board from now on)
  • Please make the picture of the controller board clear so we can check jumper configuration as well
• What LEDs come on your DLPC900 board? Which ones blink or "heartbeat," if any?
• Are your flex cables properly connected?
• Is J12 populated? If so, please remove the jumper and place on a single pin for safe-keeping. J12 is BOOTHOLDZ, which places the controller in bootloader mode
• Have you programmed this controller board with any other firmware, such as the OOB firmware the DLPC900 comes with? This is to check if the board was previously working
• Have you had any success with PLM in the past? If so, was the mirror bias kept the same in this experiment?

Please allow us additional time to answer, as my colleague is out sick today.

Thank you for your patience,
Michael Ly

Hi Michael,

Thank you very much for your swift reply.

Regarding Q1 and Q2, I took three pictures and video to share the condition of my board.

I tried to attached them to this reply but, by due to my network security restriction, I couldn't.

So could you please tell me your e-mail address to send them directly. Sorry for inconvenient...

For the other questions, I added my comments in Blue letter as below.

Q3. What LEDs come on your DLPC900 board? Which ones blink or "heartbeat," if any?

I checked them. The below is detail.

Q4. Are your flex cables properly connected?

Yes they are.

Both of them are attached correctrly as the instruction's picutre and seem to be solidly.

Q5. Is J12 populated? If so, please remove the jumper and place on a single pin for safe-keeping. J12 is BOOTHOLDZ, which places the controller in bootloader mode.

No, it's not.

J12 is open. So I guess the controller isn't put in bootloader mode.

Q6. Have you programmed this controller board with any other firmware, such as the OOB firmware the DLPC900 comes with? This is to check if the board was previously working.

I've never updated the FW.

As a matter of fact, this is my first time boot up trial.

Q7. Have you had any success with PLM in the past? If so, was the mirror bias kept the same in this experiment?

Unfortunately, I've never seen the PLM working correctly before.

The mirror bias has an adjustment history from 1.90 to 1.32 voltage in this trial.

Regarding the EVM's history,

Now, I'm inquriking my co-workers who might have used the system ever before.

If there is any new update or fact, I will share it to you as soon as possible.

Let me know if you have any further questions.

Best Regards,

Hide

Hi Hide-san,

Thanks for the update! I've sent you a friend request on E2E so that we can talk about this subject offline.

Regards,
Michael Ly

Hi Michael,

Thank you for your reply.

I sent the pictures and video file on our private message.

First I posted the video file in MOV format but it seems not to be supported, so I've reposted it in mp4 format.

Let me know if you have any concern or problem.

Best Regards,

Hide

Hide-san,

Please allow Micheal and me to look at the MOV file you sent.  Also could you take an image of the GUI screen while the system is connected (make sure the status section is showing.

Fizix

Hi Fizix,

Nice to meet you.

Attached to this reply, please find the screenshot.

I've been using version 5.1 because 5.2 didn't show check mark box status when I tried it.

Best Regards,

Hide

Hide-san,

Thank you for the pictures.  Let me confirm that this is actually the PLM FW.  If it is not, then this would be expected behavior and I will arrange to get the correct FW to you.

Fizix

Hide-san,

That is fantastic news.  I was about to reply that the FW version appeared to be correct.  Thanks for letting us know.

Fizix