Re: Is this a symptom of a bad z-sus? Vizio P50HDM
I'd check the Vzbias voltage, along with the other voltages the Y-sus produces and the Vs/Va.
I'd check the Vzbias voltage, along with the other voltages the Y-sus produces and the Vs/Va.
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Well, now it won't power on. I'm not sure what happened. I push the power button, the relay clicks, Vs comes up partially, a relay clicks again, and it shuts back off. Even with the PSU unplugged from the sustain boards it does the same thing. Can't say that I'm too happy about it.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Check the power button isn't stuck. Check AC-D. (maybe AC-DET)
I gave up on repairing these LG IPM sets a LONNNNG time a go for a very, very good and long list of reasons.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Power button isn't stuck. I found the AC-D pin but I'm not sure how to test it? It reads zero with the meter on 20VDC. I'm right behind you with these LG/Vizio plasmas.
There are two or three green LED's on the control board (main board). They both come on when the surge protector is turned on. After the relay clicks, they blink different patterns. I'm not sure what they're trying to tell me so I made a video.
https://www.youtube.com/watch?v=wLICsQcFnWQComment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
0V's bad. It should measure 3V or more.
Can you cut the wire and feed in a voltage through a resistor? The resistor should go to the main board.
The LEDs on the control board are normal. All lit is bad, they indicate the panel temperature in binary.Last edited by tom66; 03-15-2013, 06:06 PM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Hmm, odd. Which board is that?
Check the RLY-ON signal.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
I'm watching a movie with my kids. I'll revisit this in the morning. Have a good night Tom.
That's the power supply by the way.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Is it...? Looks quite different to what I'd expect, but I can only see part I guess.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Here's a pic of the power supply. The plug in the pic I posted last night is in the lower right corner next to the fuse holder.
Rly-on = 4.6v at power on, at which point the relay clicks and Vs-on jumps to ~4.5v. The relay clicks again and rly-on drops to 4.3v and stays there while Vs-on drops back to 0v. When you push the power button again rly-on drops to 0v.Attached FilesComment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Do you know how to force this thing on with a resistor?Attached FilesLast edited by johnboy1313; 03-16-2013, 08:36 AM.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
NevermindLast edited by johnboy1313; 03-16-2013, 11:55 AM.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Nevermind this one tooLast edited by johnboy1313; 03-16-2013, 11:56 AM.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
I had a breakthrough. I got the PSU to work.
Vzbias = 97.3V across both resistors.
Va = 60V
Vs = 189V
I don't know how to check or adjust the other voltages on this set.Last edited by johnboy1313; 03-16-2013, 12:21 PM.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
How'd you get the PSU to work?
Does the panel now light up?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Yeah. The panel lights but its still really dim. Vs was too high. I turned it down and the psu came on. I then adjusted it back to nominal.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
Have you tried playing with the ramp up, ramp dn etc pots on Y-sus?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
A little. There was no change other than skin tones turning kind of neon.Comment
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
You may require a scope to make further tests.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Is this a symptom of a bad z-sus? Vizio P50HDM
I've got the scope, where do I take the readings from? I'm looking at the training manual for this panel (see attached). When checking Vs, Va, and Vzbias, the readings match the label on the panel. When checking Vsc and Vy, my meter goes into overload, even when it's set on 1000VDC!!! I can't believe that this thing is pushing +1000VDC and not smoking. I'm afraid to check it with the scope for fear of blowing something.Attached FilesComment
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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.
Assuming... -
vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.
panel: au optronics T650HVN05.4
72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1
Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
https://www.shopjimmy.com/vizio-56-0...-power-supply/
Vizio 55.75J01.001G (91.75J10.004G) Main Board... -
Hi.
picked up another TV. This time is a Vizio M65-C1. TV does not turn on. I had repaired another 60 inch vizio , Bad main board.
When power button is pressed, the Power led indicator on the bottom right, turns for a few seconds and then it fades away. No backlight or Vizio logo on screen. Removed back cover and repeated test.
This is the TV This TV is a little different from the Samsung I have worked on. Power supply is on the Left side, Main Bd is on the right side, T-CON , not in the picture is on the bottom. I am assuming that the boards in the middle are the LED... -
Bug looks like hardware so thought I posted it here. Exact same behavior on 2 different model 4K Vizio TVs running their SmartCast smarttv software. After launching youtube app, press vizio button on remote to return to the smarttv menu, once in awhile, a column of bad pixels will show for few seconds on the left hand side.
It seems the vizio software is reinitializing hardware when returning to the smarttv menu. In general, SmartCast software isn't very good. Also will randomly (relatively infrequent) get no network connection when on wifi and require reboot.... -
I replaced the backlights all good. Two months later set was dead, had a shorted D9100, replaced all good again.
Now months later set powers up,backlights light ok,no picture. 12volts missing from fuse on tcon. 12VA on power
supply is 19 volts. Changed D9100 again, same, 12 volts measures 19. Am I looking at a power supply or mainboard
issue. Set will power up with remote but not power off....
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