HISENSE H49N5705 - Goes to Standby After 10-15 mins: Low U on C809, T-Con, Need HLL-4455W Diagram

U on C809 is just 370V and I believe is not enough power to transfer in secondary circuit of power.
If I disconnect tcon or just display the tv don't go to stby.
Do you have diagram of powerboard HLL-4455W?

""If I disconnect tcon or just display the tv don't go to stby. ""

you don't have any issue with power i think you have an issue with lcd or t-con
check lcd datasheet then compare voltage

Such
HiSense H49N5700UK
* also for H43N5500 / H49N5500
- PSU - RSAG7.820.7299 - HLL-4455WC - 213880
- H45N5750UK ... HLL-4455WA (RSAG7.820.7299) / * right photo


Look for this SM ( rsag7.820.4614 ) Link
OR ( rsag7.820.5687 ) Link

On (ebay, picclick ) there are a whole bunch of them , price from 25-35 Eur/ 25.GBP

__________________
In the UK the Hisense series this has a 2 year Warranty Link
This is from the company Link .
The TV series under the name DEXP U49D9000H are clones of Hisense N57xx
* Link .
TV Hisense described Link

I had the same problem.
Instead of the w825 jumper, I put a 560kom resistor.
FCP voltage measurement branch on c809, 3x 3.3Mom.
The voltage on the c809 increased to 388V.
The TV does not turn off.

If I read correctly (google translate) on C809 you have 488V. The maximum voltage supported by the capacitor is 450V. Hasn't it exploded yet?

Corrected to 388V, thanks.