Broken Vizio E500i-B1, need of service manual

[jhrsmail]

Re: Broken Vizio E500i-B1, need of service manual

What voltage did you have on the 24V line?

15.4-15.6vdc on 50" LED (E500i-B1)

[dick_barton]

Re: Broken Vizio E500i-B1, need of service manual

Mine is a vizio model m502i-b1.But the power supply is the same as shown in earlier pics.I would have to agree that the 24 volt line is mislabeled.I changed all the caps ( 35 v 330 muf)even though they tested OK,and still no 24 volt.Mine only puts out 19v,but the TV plays just fine.Wonder why would they mislead people like that?

It may be a problem with the 24V line but it appears that power supplies can be used in several sets and can be built up to provide slightly different outputs by adding or removing components on the board.

I was trying to see if anyone had a working set where the output voltage could be verified.

[jhrsmail]

Re: Broken Vizio E500i-B1, need of service manual

It's weird that the video/audio (main board) just fades away.. It would seem to me that if the main board powers up and operates for an hr or more with the 15.4 volts from the power board, it should always stay on. But depending on "whatever" it shuts off on its on.

[dick_barton]

Re: Broken Vizio E500i-B1, need of service manual

Just looking through the following thread and it clearly says that the supply is 15V although it was initially stated as 24V. Worth a read through the complete thread.

https://www.badcaps.net/forum/showth...500i-B1&page=2

[vinceroger69]

Re: Broken Vizio E500i-B1, need of service manual

It's weird that the video/audio (main board) just fades away.. It would seem to me that if the main board powers up and operates for an hr or more with the 15.4 volts from the power board, it should always stay on. But depending on "whatever" it shuts off on its on.

maybe if you have a bench psu inject 24 volts to that line on the mainboard see if the set stays on

[jhrsmail]

Re: Broken Vizio E500i-B1, need of service manual

Just looking through the following thread and it clearly says that the supply is 15V although it was initially stated as 24V. Worth a read through the complete thread.

https://www.badcaps.net/forum/showth...500i-B1&page=2

If someone mentioned they have 15V as well as me it doesn't make it OK, cause my set still powers off on its on. Worth reading these:
https://www.badcaps.net/forum/showthread.php?t=59376
https://www.badcaps.net/forum/showthread.php?t=54991
https://www.badcaps.net/forum/showthread.php?t=57214
https://www.badcaps.net/forum/showthread.php?t=56345

[jhrsmail]

Re: Broken Vizio E500i-B1, need of service manual

maybe if you have a bench psu inject 24 volts to that line on the mainboard see if the set stays on

Yeah, I don't have a bench PSU.. just an average Joe, trying to fix this stupid thing. I've changed IC9301, IC9101, and main board....and power board..It actually stayed on longer after that IC9301 ** Thanks to CAPWIZARD

[dick_barton]

Re: Broken Vizio E500i-B1, need of service manual

I appreciate what you are saying and you may well be correct. As I said I'm no expert. It's just seems odd that in the first two threads you refer to they appear to conclude that the supply ended up around 15V and working. I can't see any reference in the last two threads regarding what the final working voltage was on the 24V line.
However in one of those threads they did change IC9101 (LCS703LG) & IC9301 (STR A6069H) to get the set working again but I see you have already changed those.

Perhaps the problem is elsewhere?

[jhrsmail]

Re: Broken Vizio E500i-B1, need of service manual

Perhaps the problem is elsewhere?

I'm no expert as well, but I think the problem is : the lack of required voltages allows premature failure of IC9101 and maybe IC9301. Because after the change of ICs the display stayed on for days, I could cycle thru inputs, etc.. but finally it failed again, now it only stays on for 1-2hrs before powering off.

Another note: there are other Vizio boards that DO provide the 24v, logically our boards should do the same .

[Kaddu]

Re: Broken Vizio E500i-B1, need of service manual

I have a Vizio M502i-B1 that powers up, no sound, however it freezes at the "V" Logo. after about 20 seconds it reboots and the same cycle continues. Does not go beyond the logo. I tried the power switch reset method, but the same thing happens.
Any help will be appreciated. Thank you!

[keithsipa]

Re: Broken Vizio E500i-B1, need of service manual

I will pile onto this one and can confirm that when my TV is working, the 24v lines only report back 15.1v.
https://www.badcaps.net/forum/showthread.php?t=68882