sn75dp139

we removed a 100 ohm resistor of each pair and now the signal is much better but still no display. we see 2 second of signal 2 seconds break.

attached a picture.

we attached the schematics of the source ETC MKV and target interface TDU84.

ETC-MKV is the processor unit DDI pins at page 2 to page 31 using TI SN75DP139 Level shifter

To Mux U36 selecting HDMI_Cxx outputs to HDMI J4 connector.

TDU84 is the connected  panel  input connector J1 on page 9 to page 3.

U21 is at PD TXxx pins are in tri-state to U8  page 4 translating DVI signals to LVDSxx to J6 (LCD).

Please note that LAB on components means not assembled.

we can't see the attached pdf files if you don't see the files send me your email and i will send you direct.

for any question don't hesitate to call me ++972546480364

Yehudaetc-mkv..pdfetc-mkv..pdf

tdu84_Displaypanel..pdf

hello David,

attached a sketch shows our system include the point we measure the signals.

we test also inside our display on the device get the DVI and convert to LCD signals.

We tested our base board with some displays up to Full HD and all displays have a good picture.

from other side we test our display connected to some desktops and it works.

connection of our base board and our display fails.

we checked the HPD_SNK and DDC_EN --- OK.

the operating system reads the display details and shows the right parameters on display properties.

for any more details please call me to ++972546480364 

regards

Yehuda

Visio-DVI MK5 to TDU84 Connection.pdf