Re: Vizio vp50 hdtv20a no pic just sound
But leave everything else hooked up?
But leave everything else hooked up?
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Re: Vizio vp50 hdtv20a no pic just sound
VS volts 209.5
VG volts 15.05Comment
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Re: Vizio vp50 hdtv20a no pic just sound
I also was checking the fuses for power and were the main power wires come in there are two fuses one on each side of the plug. The one on the right has 122.7 ac volts and the one on the left has .708 ac volts is that normal or should both have 120 volts?Comment
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Re: Vizio vp50 hdtv20a no pic just sound
Sorry just found the VA 63.9 volts
I had to unplug the buffer board plug that's the only VA pin I seeComment
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Re: Vizio vp50 hdtv20a no pic just sound
So, it seems that the Y-main and X-main are the only faulty parts. I'd test the components in circuit with the failed caps (mosfets, diodes, resistors, etc) on those two boards then replace as needed. Do you have any other pics from a different angle that show the components on the heat sinks?Last edited by capkid; 04-28-2013, 02:00 AM.Comment
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Re: Vizio vp50 hdtv20a no pic just sound
Ok thank you for your help. Is there any website I can go to for more info on how to check the two boards?Comment
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Re: Vizio vp50 hdtv20a no pic just sound
I haven't looked around here much, but there may be info on how to do component-level testing. Hopefully, you just have blown caps. The other thing I was thinking is that you should probably remove your buffers and test them for shorts to make sure they're not bad. Sometimes, the pin holes are so small that they're hard to see. Tom66 has some good info on how to test this particular set of buffers @ 4:35 in this video: http://www.youtube.com/watch?v=51SZsfH60EYLast edited by capkid; 04-28-2013, 02:09 AM.Comment
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Re: Vizio vp50 hdtv20a no pic just sound
Give me a min and I will get them to youComment
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Re: Vizio vp50 hdtv20a no pic just sound
This is the y-mainAttached FilesComment
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Re: Vizio vp50 hdtv20a no pic just sound
Same side y-mainAttached FilesComment
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Re: Vizio vp50 hdtv20a no pic just sound
Other side of y-main, see the bad cap.Attached FilesComment
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Re: Vizio vp50 hdtv20a no pic just sound
Y-mainAttached FilesComment
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Re: Vizio vp50 hdtv20a no pic just sound
X-mainAttached FilesComment
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Re: Vizio vp50 hdtv20a no pic just sound
X-main here is the other bad cap, between the fuse and the bigger 250v 68uf cap. I already took it out waiting on the new one. Luckily I ordered two one for a spare, then I found the other one blown on the y-main tonight.Attached FilesComment
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Re: Vizio vp50 hdtv20a no pic just sound
Did you check the green fuse next to the cap? I'd also check the transistors on that heat sink.
Yeah, I always order extras. I'd do the same thing on the X-main: Check the components near the cap and check the transistors on the heat sink. It looks like there's a green fuse near that cap, too.Last edited by capkid; 04-28-2013, 02:42 AM.Comment
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Re: Vizio vp50 hdtv20a no pic just sound
I checked all the green fuses, and they are good. Don't know how to check the transistors.Comment
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Re: Vizio vp50 hdtv20a no pic just sound
It's hard to see the markings on the transistors, but I can at least see K2837, which is an N-channel mosfet. I'm guessing that the others are N-channel transistors or diodes, but I don't know.
For K2837, from left to right, you have Gate, Drain, and Source pins. In diode mode on your meter:
(1) Place your red probe on Drain and black probe on Source: Should read "OL" or "1" depending on your meter (no reading).
(2) Reverse your probes: You should get something like 0.5V.
Repeat this test for Gate and Drain:
(1) Place your red probe on Gate and black probe on Drain: You should get something like 2V. <<- may be dependent on your meter.
(2) Reverse your probes: Should read "OL" or "1" depending on your meter (no reading).
The key is that you should get a reading in one direction and no reading in the other direction.Last edited by capkid; 04-28-2013, 03:06 AM.Comment
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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... -
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Good day ladies and gentleman!
I am currently trying to repair a Grundig Vision 9 37 9880 T USB LCD TV for a friend that has a weird audio problem. Basically everything works fine except for the heavily distorted sound when the Subwoofer module is connected and there is a buzzing sound coming from the PSU PCB.
This seems to be a rather rare TV so there is not much prior on topic help to be found however a service manual is available at the usual sources (Electro Tanya i.e.).
I think the PSU buzzing comes from one of the coils near the bridge rectifier but... -
Have a free Vizio E60-E3 pickup - sound and backlights work. set turns on and stays on for a period then cycles off and back on. NO VIDEO. If I remove left side (from front of TV) of TCON cable - set has pic on right side (from front of TV) with white screen on left side. With right side TCON cable disconnected - no pic on either side.
Does this mean remove right side (from front of TV) tabs ?
Like a second opinion before possibly destroying set....
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