AnsweredAssumed Answered

Trouble of ADV7511 at low temperature

Question asked by Kaos on Nov 18, 2015
Latest reply on Jan 28, 2016 by Kaos

Dear Sir/Madam,

 

I need your help.

As for your ADV7511, our customer have met the trouble as following.

So please advice us why this trouble coming?

 

step-1

Put the cusomer-product that is put ADV7511 and ADV7612 on the cold room 0C to 15C.

step-2

Power-on the customer-product

step-3

Set some resisters on ADV7511

step-4

After 20-30sec, the display show the black out of 2 frame (this is trouble), otherwise show like a stormy display.

At this time, customer have catched the change phase at TXC+ of ADV7511 as for input clock.

When the customer read PLL-lock-status(0x9E), then he has catched as following.

when before trouble; 0x1A

when after trouble happen; 0x1C

And after 0x1C the trouble have closed.

So there is not happen twice after this.

 

troubled products= 3 units (of 10units) not all

 

He has designed from ADV7612-Ver.3.0c.txt

 

Also I enclosed the scope shot and schematics around ADV7511 here.

 

Thanks Kaos

Outcomes