Re: Vizio E470i-A0 - FL test ok, half bl working
I just put the front escution back on its working and I have done NOTHING to fxi it
I just put the front escution back on its working and I have done NOTHING to fxi it
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Re: Vizio E470i-A0 - FL test ok, half bl working
Your TV has dynamic contrast control (Faked Dynamic contrast spec), the backlights level will vary with the Video signal.
But the amount of variation you are seeing is not big at all, 0.380 ~ 0.404V it is less than 10%.
Look to see if you can turn off the Dynamic contrast function in t he OSD user settings menuNever stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
Is there any way the Main Board could Instruct the one channel to shut down even if its a malfunction on that control line ?Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
No, typical backlights protection circuit in the LED driver will shut down All output if one or both loads are not present, it will also shut down if one or both detect over current.
Some TV will send the error signal to the main board when the protection circuit kicks in so main board will set the error code.Last edited by budm; 05-04-2019, 05:02 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
BTW, in your video where you show the test points using the leg of the R9110, R9210.
It shows that low (0.38V ~ 0.44V) because that is the vdrops on the current sensing resistor, the Voltage will be higher if you measure the Voltage at pin 1 and pin 5 of the LED connector.
Can you check the resistance value of R9110 and R9210?Last edited by budm; 05-04-2019, 05:03 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
ill do that monday it is higher on the pin did you watch all the videos I uploaded ?Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
So we still have a mystery because only the one channel is affected by the video not the other and I agree with you can't see why it would be designed that way. But you saw it. And the channel that is affected is the channel we were having issues with shutting down .Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
1) Your post #32: STEADY VOLTS
So 105v >>>>>>>27 LEDS .7 VDC ,,,,,,,back to power board
thats from the set that works with no issues.
My reply on post #33:
"As you can see it does not add up, and you get the same result with replacement power supply.
But you indicated that you have working TV for comparison so if you transfer the board from non-working to the working TV one at a time then you can see if the boards from the bad set are good or not."
You never reply to let me me know if you have done that or not, that will tell you if the symptom will change or follows the board or not.
2) Your post #47:
So we still have a mystery because only the one channel is affected by the video not the other and I agree with you can't see why it would be designed that way. But you saw it. And the channel that is affected is the channel we were having issues with shutting down .
Answer, that will easy to prove by checking the working set to see if it does the same thing all not.
3) You have two same model TV one is working and one is not working correct with backlights that go out, that should be easy to do comparison test and do the board swapping.Last edited by budm; 05-05-2019, 01:05 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
I have one tv I have 2 sets of power boards ...actually 3 but IM ignoring that one completley as it was the original board in the tv and is actually different but crosses to the boards were working with
The resistor values you asked for a are 1.8 ohm and 1.7 ohm with about .4 ohm error on shorted probe 0 check The tv is running this morning and the volatges are as follows 105 at initial start up then when i get picture drops to 100v both channelsComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
Im going to button this up the customer is stoning me for his tv ... both boards react the same .. I have the kit from ShopjimmyAttached FilesComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
Since its working it came right on this am with no issues it worked all day sat with no issues Im going to call it fixed but this is good information for anyone trying to repair these boards..
Thanks for your helpComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
The color codes on the resistors make no sense to me since I calculate 15 ohms
but that is obviously wrongAttached FilesComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
Spoke too soon acting stupid once again
https://www.youtube.com/watch?v=Ofel9i31FY0Comment
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Re: Vizio E470i-A0 - FL test ok, half bl working
well its related to hdmi signal somehow
https://www.youtube.com/watch?v=5TIVgQVMQtsComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
Pin 11. 2.5 v pin 10. .119. Short pin 10 to pin 11 and ch 2 starts up. Plug to the main boardComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
to my surprise The BL adjustment still worksComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
conclusion BAD MAIN BOARDComment
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Re: Vizio E470i-A0 - FL test ok, half bl working
left the jumper and its going out the door! DONEComment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
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Failure Symptom
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Where is the short?
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Having recently fixed another Vizio with similar symptoms that was a shorted ESD diode array ( link ) Probed the ESD diode array but... -
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I measured DC voltage between negative and positive pin of the largest capacitor(400v 10uf) and it was measured contant 300V.
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link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1
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