Re: Vizio E601i-A3 backlighting problem
And here are better pictures of the boards in the TV:
SANY6609 = Entire back of TV with cover removed
SANY6612 = Power Board
SANY6615 = Power Board (closeup of LED power connector area)
SANY6617 = Main Board
SANY6618 = T-Con Board (covered by small protective frame/heat sink)
SANY6621 = Small Keypad and IR Boards...
splinke
Member
Last Activity: 01-20-2019, 02:32 AM
Joined: 07-05-2018
Location: Carlsbad, CA
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Re: Vizio E601i-A3 backlighting problem
OK, I took the back cover back off the TV and disconnected and reconnected the various ribbon cables, and now the image is back to normal, and the backlight still works. So, I guess I have revived my TV--at least for now. Thanks to everybody for all of your help!
Here are some things I learned:
1. Pin 10 of connector CN201 (Power Board to Main Board) labeled "BL-ERR" most likely stands for "Backlight Error," and, in my experience, it read ~3.3 volts when my backlight was not working...Last edited by splinke; 10-22-2018, 07:33 PM.Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
Here are some rather poor photos I took before putting the TV back together:[LIST][*]SANY6574 = Main board with part of power supply board and T-CON covered by metal plate[*]SANY6576 = Partial main board and power supply board with T-CON covered by metal plate[*]SANY6577 = Part of power supply board and T-CON covered by metal plate[*]SANY6578 = Main board (dark picture)[*]SANY6580 = Control panel and IR area[/LIST]- Re: Vizio E601i-A3 backlighting problem
Here are some rather poor photos I took before putting the TV back together:[LIST] - SANY6574
Last edited by splinke; 10-22-2018, 02:11 AM.Leave a comment:
- Re: Vizio E601i-A3 backlighting problem
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Re: Vizio E601i-A3 backlighting problem
In partial answer to your question, I would refer you to [URL="https://www.youtube.com/watch?v=9Fya3vuugjY"]THIS VIDEO[/URL] on ShopJimmy, which shows the [URL="http://www.shopjimmy.com/vizio-09-60cap000-00-power-supply-led-board.htm#"]power supply board[/URL], main board, and T-CON board at about 25 seconds in.
That said, the story on this TV gets a bit crazy. After putting the light diffuser sheets, LCD panel, and frame back on the TV, I powered it back up to do some more voltage testing. Lo...Last edited by splinke; 10-22-2018, 02:21 AM.Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
Whether the LED power connector at CN301 is inserted or not, I get similar results (quick voltage spike up and down immediately at power up). Sorry, I have a very basic multimeter that does not measure min/max or set any sort of range.
I have also tested continuity between the disconnected connector and the 8 test points on the LED strips (2 positive and 2 negative on each strip), as well as the metal chassis. For each of the 8 "pins" on the connector, I only get continuity to the single expected test...Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
Your post emboldened me to increase the voltage, and when I ramped up from 5 volts to 6 volts, the LEDs rapidly got super bright, as I would expect from a TV backlight, and the current ramped up to about 35 mA! So, now I am back to thinking that all of the LEDs are fine (and that they are 6-volt LEDs).
If you look at the power supply board data I put in my original post, is there anything there that would definitively identify that board as the problem. As I have mentioned, the voltages at the four positive LED...Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
Yeah, the photo of the replacement LED strips on ShopJimmy suggest that the individual LEDs are "LG Innotek 7030PKG," and I was able to find an LG brochure that includes an entry for a "7030 series" that look the same. The information in the brochure indicates a voltage range of 2.8 to 3.2 volts, a normal current of 200 mA, and a maximum current of 280 mA for the LEDs. I am not 100% sure this is what I have, but it probably is.
All of my individual LEDs begin to light up and show current at...Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
I am wondering how it can be determined that they are 3-volt LEDs, rather than 5-volt. I borrowed a DC power supply to check each of the individual LEDs. None of them lit up with 3 volts, but all 136 of them lit up with 5 volts. However, I did not know what amperage setting to use, so I chose a very small number--20 mA. Could they all light up with 5 volts if some or all of them had failed due to an open circuit or short circuit?
Also, I was also able to make adjacent pairs of LEDs light up when applying 10 volts,...Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
I am resurrecting my own thread in the hope that somebody can still help. I figured before sending the TV to the landfill, as I indicated in my last post, I might as well finish tearing down the TV to get at the LED strips to see if they were working...not caring whether I destroyed anything in the process.
I removed the LCD and light diffusion panels, exposing [URL="https://www.shopjimmy.com/vizio-je600d3lc2n-led-bars.htm"]two LED strips[/URL] along the bottom edge of the TV. Each strip has two sets of wires going...Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
I was hoping somebody here would know whether the brief power-on spike in voltages at the LED power connector on the power board provided any hint on whether the failed backlight was the result of bad LEDs or a bad power board. In the end, I concluded that the voltage spike and immediate drop to virtually zero must be an overvoltage protection circuit kicking in, and that the problem is more likely with the LEDs than the power board. I was prepared to replace the power board, but I think the LEDs are a different order of difficulty, and I...Last edited by splinke; 07-08-2018, 12:54 AM.Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
Thanks for that information, and it all sounds reasonable. Unfortunately, my multimeter does not have a min/max function, and I am not sure whether it is worth investing in one for this one project--or whether the additional information I could get would help solve my problem.
I assume that the [URL="https://www.badcaps.net/forum/showthread.php?t=57407"]previously reported[/URL] +83.5 and -83.5 voltages at the CN301 LED power connector were steady voltages, as opposed to peaks on power up. Since the LEDs...Last edited by splinke; 07-06-2018, 11:06 AM.Leave a comment:
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Re: Vizio E601i-A3 backlighting problem
I did several more tests on the CN301 connector on the four pins that briefly showed voltages at initial power up (1, 4, 5, and 8). The peaks seem to vary from about 15 to 45 volts (positive or negative) on the board side, whether the connector is attached or not.
Originally, I was thinking that the power board must be the problem, because the voltages do not stay at reasonable levels to power the LEDs. However, after watching and reading more about this, it seems that some power boards are designed to cut off power when there...Last edited by splinke; 07-06-2018, 01:58 AM.Leave a comment:
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Vizio E601i-A3 backlighting problem
I have a Vizio E601i-A3 LCD TV. This morning when I turned it on, I heard sound (coming through the optical audio out port) but could not see video (including the on-screen Vizio logo when first powering up). When shining a flashlight on the screen, I discovered that the video was actually there and seems to be OK. So, I suspect that it is the backlighting that has failed. It is my understanding that this model is edge-lit ("Razor LED"), although I could be wrong.
I have searched this forum, and most of the problems seem to include functional backlighting with no video.... -
Re: New Members - please post your introductions here
I have a Vizio TV on which the backlighting is not working. I am posting here so that I can start my own thread in the appropriate forum.Leave a comment:
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