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DLP & MEMS
DLP LightCommander Development Platform
LED LIT status returns zero
I have a question I hope you can help me with.
Recently we disassembled the LightCommander (LC) to be able to use the LED-module and the DMD-module separately. Everything worked fine. After reassembling however the LC will not project anything. The problem seems to be that the LED's are not turning on, except for a small flash when flipping the master on-off-switch to the on-position. When the LC is connected to a pc and the SW is Logic SW is started, the startup screen shows all green but the OverallLEDlampLitState returns zero (see screenshot)
We have already tried completely erasing the flash-memory and reloading the firmware, but it did not help.
Could you please advise us on how to proceed with this issue?
Thanks in advance and best regards,
GetLEDDriverFault 0 indicates the main controller board is able to talk to LED Driver.
GetOverallLEDlampLitState 0 LEDs not LIT.
First check: There is PARK/RUN flip switch, ensure it is at RUN position. Otherwise LEDs will never be turned ON. Proceed to next step if it didn't help.
Second check: On the main board there is LED Light Source connector (J4) point when the kit is turned ON and running, verify there is some signal activity on the following lines J4 Pin nos. 9, 10, 11, 12, 13. Also run a structured light solution with Red, Green, Blue and IR LED selected to ensure signal presence on these lines. Proceed to next step if it didn't help.
Third check: There are number of wires going from LED Driver to illumination module ensure these are secured properly.
Thank you very much for the prompt reply!
- I verified that the park/run switch is in the 'run'-position.
- There is a voltage on pins 9 through 13 of the J4-connector (typical about 3.2 Volts).
- The wires from the LED Driver to the illumination module are all in one plug, aren't they? This plug is securely fastened. Also the J4-connector is securely connected at both ends.
Is there something else I can try?
Thanks for your trouble!
I am Sanjeev's colleague. Please remove the lens from the front and observe the surface of the DMD directly. Do you see a checkerboard pattern on the DMD?
If not check the DMD daughter board connection in the slot at the edge of the Controller board to make sure it is completely seated. If that does not cure it please let us know.
Also thanks to you for the fast response.
I can't observe a pattern on the DMD. I tried running a number of different test-patterns. Moreover, I think the DMD is in the parked state because I see my reflection when looking straight into it. The switch on the controllerboard is surely in the run-position, and to be sure I also issued the DLP_Display_UnparkDMD-command.
On issuing the commands DLP_Status_GetDMDhardwareParkState and DLP_Status_GetDMDparkState, the LC returns 0x0000.
I'm looking forward to your response!
Takeout the Controller board and the DMD board from the kit. Connect only DMD board to the Controller board. Remove all other connectors to the controller board except the power supply. Now power ON controller board and let us know if it display the pattern on the DMD.
With only the power-cable connected to the controller-board and the DMD-board inserted into the slot, I still don't see a pattern on the DMD
Is there any pre-loaded "solution" on it? If there is nothing then it should display B&W checker-board pattern.
Check if DMD sitting firm on the DMD board. There is lock on the DMD socket that ensures DMD is securely fastened to DMD board.
Tru DMD park and unpark. Verify if you see any movement on the DMD.
Dear Sanjeev and Fizix,
I took the DMD out of the DMD-board and put it back in again and then the checkerboard was visible. After that I reassembled the whole LC and it is working again!
Thank you both very much for the fast responses and good directions! I'm really pleased with the provided service.
P.S. I have one other question about the dichroic mirrors inside the LED-illumination module, but I'll start another thread for that.
You are welcome.
We are here to help you :)
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