Re: Vizeo E500i AO dead with led on
R-J
jp113 and 116 were measured from C120 neg. not chassis gnd.
rayxoxo
Member
Last Activity: 10-17-2020, 07:04 PM
Joined: 05-29-2013
Location: Sacramento, ca
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Last edited by rayxoxo; 06-17-2020, 02:12 AM. -
Re: Vizio E500i-AO dead, no sound or video
Sorry for the delays but things happen.Leave a comment:
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Re: Vizio E500i-AO dead, no sound or video
Sorry for the Finally did all readings with one of my Flukes and here they are:
CN201-
1 & 2 = 5.2v
6 &7 = 0v
8 =0
9 = 0
10 =0
11 =~ .01~.03V
using hot gnd:
C120 = 169vdc off - 305vdc on
jp113 = .12 off - 14.5v on
jp116 = 16.7v off - 21v on
ON = led lit - OFF = led off
Sorry for the delays but things happen.Leave a comment:
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Re: Vizeo E500i AO dead with led on
[ATTACH]213574[/ATTACH]LOL, Budwich, about wrong board.
Yes, I have checked the 12v with power on and off - I could do that with out any trouble. No 12 v at all.
I just went out and rechecked pin 9 of cn201, get no change when led is on or off. I put my fluke 77 on hold and no real change on pin 9.
Do you want me to take a picture on the back of the PS board ?
Well if so here it is.
Thanks for the help.Re: Vizeo E500i AO dead with led on
[ATTACH]213574[/ATTACH]LOL, Budwich, about wrong board. ...Last edited by rayxoxo; 06-03-2020, 08:18 PM.Leave a comment:
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Re: Vizeo E500i AO dead with led on
I tried to get the part numbers off of ic 120 & ic120 - I couldn't read them - My plan was to look up their data sheet to try checking out their inputs and outputs, but the print of the their info was unreadable, even with magnifying glasses.Leave a comment:
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Re: Vizeo E500i AO dead with led on
OK, I am starting new---
I tried measuring ic120 and ic 150 -but I am having trouble with them. When I try to turn on the power led it only stays on for about 5 sec. and so by the time I get to the ic they are off - no power on pin 14, or what ever pins are the power. I really need to correct the intermittent power on/off problem - It has been the real pain in the neck besides using the defective vom.
I can not get any readings until I have consistent power. need the white led light to remain on - I really think that I am wasting you...Leave a comment:
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Re: Vizeo E500i AO dead with led on
LOL - That happens to me all the time - nomoresonys. But it is really nice that you guys are there to help us crazies -
I am scratching my head, thinking what am I doing trying to fix a friends tv when they have enough money to by 10 new ones???Leave a comment:
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Re: Vizeo E500i AO dead with led on
I think you have resolved the mystery R_J - It was a cheap cen-tech meters from Harbor Freight - I was using two of them from Cen-Tech out in the garage and they both read 340 to 670. Even the HV led came on - That is the first time I ever found such a defect in the meters from HF... Will tell them about it on my next visit - Though they may not care -
I have decided that I am going to use my other brand meters , like my flukes, etc. I will also tell all I meet about the $5 meters.
Sorry but I am going to go through all my previous...Leave a comment:
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Re: Vizeo E500i AO dead with led on
Where is the AC coming from? Either a step up xformer or an ac voltage doubler is causing the AC voltages - and the diodes aren't doing their job??? And why is this AC cross the c120 cap?
very odd indeed.
A schematic of that particular circuit area would be very helpful.
R_J any idea as to where and how this new AC voltage has appeared? It's got me...Leave a comment:
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Re: Vizeo E500i AO dead with led on
What I found R_J :
Also resistance tested OK on D120.
all 3 diodes read 171 vdc on each cathodes -
Will try checking the voltages on each one to be sure they are working - What is the voltage coming out of D120, D121A & B?
Thanks for your help patience R_J. If nothing else I do appreciate your encouragement.
C120 = 171 on and off.
Decided to test the ac across c120 -340 ac off and 668 ac on. Removed c120 to retest with a few other meters, besides one of my ESRs. C120 =140.2uf ---should be 150....Leave a comment:
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Re: Vizeo E500i AO dead with led on
D121a and b test ok
c602 read 21.57mf = ok
c606 reads 22mf = ok
c120 v still low
And yes, using c120 neg./gnd
Have not done reading on ic'sLeave a comment:
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Re: Vizeo E500i AO dead with led on
C120 = 170v to 298v
jp113 =14v
jp116 = 16v to 20v then back to 16v
I hope you didn't want me to do the pin read the outputs on the 2 ic120 & 150 --- my eye's are not as good as they used to be and a little dark in the garage.
Maybe we should try fixing the on/off led problem so that I can get the same reading every time. It might fix the varied readings that I keep getting?
Can I just permanently jumper with a 1kresistr 201 -pin 8 to pin 1? and would that stabilize the readings? for further...Leave a comment:
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Re: Vizeo E500i AO dead with led on
I am using chassis ground, but when reading c120 I am reading it across both legs of the cap. I will try looking on the back of the PS board for ic120 & 150.
What is bothering me is the two different reading of them (jp 113 & 116)?
It seems to be the correct readings for about 30 sec to a minute and then zero. Like some part of the system works for a short time and then closes down.
I''ll try to get back to you today or tomorrow, with what I found.
Thanks again R_JLeave a comment:
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Re: Vizeo E500i AO dead with led on
R_J
More strange reading. When first plugged in jp 116 read 28v and jp113 read about 33v. After plugged in for about a minutes they both read 0V - but if left plugged in no reading on either jp.
C120 -167v and on 303v
I could not find a ic 120 nor the ic 150 ?
Again I should mention that the on/off led - when pressed on white led stays on for about 6 second then goes off for about a second and then turns back on for one final second.
What area changes the higher voltage...Leave a comment:
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Vizio E500i-AO dead, no sound or video
Found there is no 12v on pins 6 & 7 of CN201.... -
Re: Vizeo E500i AO dead with led on
[ATTACH]212782[/ATTACH]
[ATTACH]212783[/ATTACH]
[ATTACH]212784[/ATTACH]
[ATTACH]212785[/ATTACH]
[ATTACH]212786[/ATTACH]Nomoresonys. -
I found no 12 v was present - and ordered 2 mosfets, Q150 and Q151. If there are any others problems in that area that might be defective that info would be appreciated.
What caused the mosfets to break down? A schematic would have been helpful -
Thanks
RayRe: Vizeo E500i AO dead with led on
[ATTACH]212782[/ATTACH]...Leave a comment:
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Re: Vizeo E500i AO dead with led on
Have not received any responses or help for over a week.Leave a comment:
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Re: Vizeo E500i AO dead with led on
I've tested the bigger caps with a ESR - and they seem fine, I haven't tested the blue one s as yet. Also tested the diodes in the area. If that's any help.Leave a comment:
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Re: Vizeo E500i AO dead with led on
All help appreciated. No +12v - 5.2vsb OK on PS board.
Thanks,
rayLeave a comment:
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Re: Vizeo E500i AO dead with led on
I now have the tv here at the house and can do the test. I checked the 5.2vsb. It stays on even when the led goes off.
By the way the led turns on for about 6 sec. then goes off and then turns on again for about 1 sec. if that's any help.
No 12v -
Pin 8 changes from 0 to about 3v, but not every time it is powered on.???
With 1k ohm jumper between 1 & 8 of cn201 - voltage comes up to 5.2v .Leave a comment:
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