Hisense 65K560DW Power Supply problem

[boyebaran]

hi to all
I have a Hisense 65K560DW TV with problems on the Power Supply Board
part number: RSAG7.820.4877
My issue was the standby 12V not stable and changing between 11.2 to 12 v. This was causing the power supply to go into a protection mode . Only symptoms externally was blinking dim standby led.
Measured across VZ901 but the voltage was also fluctuating there. I discovered the rectified DC output from VD901 and VD902 was not stable with approximately a 40V ripple.i attached pdf
please advise me
tnx

[dskall]

Re: Hisense 65K560DW Power Supply problem

Check for shorted parts and caps. in standby circuit

[R_J]

Re: Hisense 65K560DW Power Supply problem

What are the E. B. C. voltages on V901? VZ901 may be bad