E552VL 0500-0507-0790 Clicking.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

Here

[budm]

Re: E552VL 0500-0507-0790 Clicking.

OK, the relay is not clicking on and off, I just want to make sure the relay is on solid.
Now you need to check resistance of Diode D803, 807, 809, MOSFET Q801B (this one drives L802), Q801A (this one drives L801), since there are two PFC circuit which then we can do the resistance comparison checking, TV not plugged in of course.
BTW, how are those two brown main filter caps (laying on its side)? Any sign of liquid leaking at the legs?

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

803 = 585
807 = 582
808 = 582 set in the 2000 Ohm Range
they test Open in reverse.

Not having much Luck testing the Mosfet with my crappy meter

[budm]

Re: E552VL 0500-0507-0790 Clicking.

The MOSFET can be done by comparison reading since they are the same setup.
The resistance readings on the combination of all 3 pins should be about the same.
You do not see any bad solder joints on the board around the L801, L802, and other sections?

[budm]

Re: E552VL 0500-0507-0790 Clicking.

BTW, you can also swap the L801 and L802 to see if the hum follow, same for the MOSFETs.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

Ok and they are

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

Swapped L801 and L802! and........ The Hum is now in the L801 Circuit and the Symptoms are the Same! click click click...... Do the Jumper Hummmmmmmmmm soon as I light the back light. they are Duo Circuits for the Backlight Power are they not Budm???

[budm]

Re: E552VL 0500-0507-0790 Clicking.

OK, so it is not the inductor problem, I would swap the MOSFET next. If swapping the MOSFETs does not change the humming location, the changing the PFC Controller will be next, not much we can do without the diagram.
They are dual PFC Voltage booster power supply.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

Re Hit all the Solder Joints on the Mosfets while I was in there. But like I said it Swapped to the other Circuit now

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

No the Humming Moved with the Inductor swap.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

The Inductor Hummed in position 802..... now its humming in 801.

[budm]

Re: E552VL 0500-0507-0790 Clicking.

We already prove that it is not the inductor problem since the hum is still in the same location (L802 location) so now you have to swab the MOSFETs.
Or I am not reading your result correctly. If L802 is bad, then when it is mounted in the L801 location and it still hums then the L802 is bad.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

NO NO NO I Typoed that the hum is Now in 801!

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

The Same Inductor that I Shoved real hard on the back of when I got the TV and it ran for 24 hours.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

I am Sorry I was Unclear. the Noise moved with the Inductor and the Symptom of the PS cutting off unless I Jumper remained the same. but these are Duo Circuits to run the pair of backlight boards are they not?

[budm]

Re: E552VL 0500-0507-0790 Clicking.

OK, so it is bad inductor L802 then. I never run into bad PFC Inductor yet.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

Well I have a PS on the way! I will report back when I install it! For now you have me confident its in the PS

[budm]

Re: E552VL 0500-0507-0790 Clicking.

It is a Dual PFC Voltage booster that boost the DC Voltage from 160VDC to >360VDC to supply the power to run the inverter circuit.

[IRace93]

Re: E552VL 0500-0507-0790 Clicking.

But.... the Hum and Click Moved... I just went back out and Checked it again It moved and I can change the Frequency of the sound by pushing on it.

[budm]

Re: E552VL 0500-0507-0790 Clicking.

I wonder if the Ferrite core is cracked.