Other Parts Discussed in Thread: DLP4710
Hello TI engineers,
We just bought 2 more DLP4710EVM-LCs. We had bought one 6 months ago, and it is working just fine. However, these two both have (different) problems.
1. One of the units does not display what we expect in 1440 Hz mode. Pixel value 0 is displayed at an intermediate luminance level, instead of being very dark as it is in the other two DLP4710EVM-LCs that we have. Pixel value 0x001 is somewhat more luminous. All the other bits (0x002, 0x004, ..., 0x800), when set individually, yield the highest luminance. This is in contrast to our other DLP4710EVM-LCs, where 0 is very dark, and all the other 24 bits (0x001, 0x002, 0x004, ..., 0x800) yield equal luminance values. It's not a problem with the video signal that we're sending, because we're using the same machine and the same software for testing all three units. I've re-flashed the firmware just in case, but that doesn't change anything. Do you have any idea what could be wrong?
2. The second unit doesn't have this problem, but it does have another one: two dead pixels on arrival. Do you consider that enough of a defect to ask the distributor (Mouser) for an exchange?
Thank you for your help,
Mark Wexler