Other Parts Discussed in Thread: DLP4710,
Hi,
We have an issue with our custom board which is based on reference design
for the DLP4710 LightCrafter. There are different opinions on the support
forum regarding connection of the sub-LVDS between DMD and DLPC3439 in case
of dual ASIC use:
https://e2e.ti.com/support/dlp/f/94/p/730365/2700616#2700616
https://e2e.ti.com/support/dlp/f/94/t/741486
https://e2e.ti.com/support/dlp/f/94/t/657816
Some say we must use only one configuration for both DLDC3439 chips, and
others say that different configuration should be used.
By now we have a board with the same routing (Option1 - Slave) of sub-LVDS
signals for master and slave. And there is only the half of DLP4710 working
properly and displaying images. This working half is connected to slave
DLPC3439. Other half (master connected) only shows non-periodic bars of
different intensity. Their appearance depends on splash screen or test
pattern selected, they can change width and intensity, but nothing close to
real image. We have tested the two of manufactured boards and they behave
the same way.
All power supplies look good, LEDs are enable and no system errors is
reported. With Read System Status (D1h) command we get:
Master vs. Slave Operation - 0h: Master
Is that abnormal display functioning is the result of our signal routing
configuration or something else? If yes can our problem be fixed with a new
firmware? Or is the retracing of pcb the only way to get system working
properly.
Regards, Maxim Galkin