SN65DP159: Screen has no output

GARETH OU

Part Number: SN65DP159
Other Parts Discussed in Thread: SN75DP139

Designed for DVI-D output, but the screen has no output I have changed R1721 to 4.02K, and the strap pins are equipped with R2439, R2437, R1725.

The situation is the same. Is the strap pin correct? Is there any suggestion to adjust the schematic diagram?

SN75DP139.pdf

over 3 years ago

0 Brian Zhou over 3 years ago

TI__Guru*** 145885 points

DP159 or DP139?

0 GARETH OU over 3 years ago in reply to Brian Zhou

Guru 11415 points

Hi Brian

Sorry DP139

0 Brian Zhou over 3 years ago in reply to GARETH OU

TI__Guru*** 145885 points

do you have these parts on the board?

0 GARETH OU over 3 years ago in reply to Brian Zhou

Guru 11415 points

Hi Brian

These parts are not soldered.

Do you need them to be soldered?

Thanks you

0 David (ASIC) Liu over 3 years ago in reply to GARETH OU

TI__Guru**** 177171 points

Hi,

Does the source support DP++? If the source supports DP++, then they need to AC couple the DP139 input.

Thanks

David

0 GARETH OU over 3 years ago in reply to David (ASIC) Liu

Guru 11415 points

Hi David

could you help to confirm whether Strap pin 6 ,pin 4 ,pin 34,pin 35 are correct

Thanks you

0 David (ASIC) Liu over 3 years ago in reply to GARETH OU

TI__Guru**** 177171 points

Hi,

You can use Table 1 in the datasheet as a reference

Pin 6 needs to be tuned depending on the compliance testing result.

Pin 4 needs to be pulled low for DVI.

Pin 34 and 35 would depend on the system design.

Thanks

David

0 GARETH OU over 3 years ago in reply to David (ASIC) Liu

Guru 11415 points

Hi David

Is Pin SDA_SOURCE & SCL_SOURCE connected to cpu Auxiliary or i2c?

0 David (ASIC) Liu over 3 years ago in reply to GARETH OU

TI__Guru**** 177171 points

Hi,

It depends on the source implementation of its AUX and DDC function. If they probe the SDA_SOURCE and SCL_SOURCE, are they seeing the I2C communication?

Thanks
David

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SN65DP159: Screen has no output