Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

[eagle00799]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

So I ordered the kf5n50's from SJ and the fuse from Digikey I will let you know how this goes after the parts get here.

[eagle00799]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

Just letting everyone know I had success fixing this tv. I replaced Q0465R Resonant Power IC. (U101), the cement fuse, and 4 power mosfets on the bottom of the board. Can't thank you enough Budm and everyone else that makes this site so great. Thanks again.

[budm]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

Glad to hear and thanks for the repair follow-up.

[mnorton]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

Hi Guys,

I have a problem like these in this post.

When it does work it works fine. when it lose power, it will not turn back on. I have nothing that turns on. I replace with a known good power supply board it it did not solve the problem.


what should I be looking for

Thanks

[Newbie62]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

OK, check fuse F601? WHITE RECTANGULAR BOX close to the 450VDC large cap to see if it is OK first, if it is then:
you can test the power supply board by itself first without having other boards connected to it, you will be measuring the DC Voltages on the two legs of the cap C104, C105 which are in the hot DEADLY side of the circuit so care must be taken.
You will have to flip the board so you can easily work on the bottom side of the board, make sure not to touch anything or let the probes slip on you.
We also need the P/N of U101 SMPS IC so we can look up the spec sheet for it.
You should pug the board into GFCI outlet for safety.

I have one of these tv's that had no logo light and no voltages whatsoever on the output pins.
I replaced the ICP250 with a MPC71 I had on one of my junk parts boards and the tv fired up !
The value of the ICP250 IS .16 - .25 ohms 5 volts, I replaced it with .22 ohms 5 volt.
THANK YOU BUDM !!!!!

[countryguy45]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

I have this set I have 5 volts stand by power and can cross out the pins and get the 12 volt as well, I ordered a new main board and still have nothing....Think I got ahold of a bad main board

[nomoresonys]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

I have this set I have 5 volts stand by power and can cross out the pins and get the 12 volt as well, I ordered a new main board and still have nothing....Think I got ahold of a bad main board

Are all the voltages correct on the powersupply board?

[countryguy45]

Re: Vizio E320VL - No Power, No 5v Standby - DEAD PSU??

yes voltages are correct but nothing not even the amver vizio is coming on