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Re: Vizio E370VT no longer turns on
dick_barton can you clarify which points are A and B that you are referring to?Comment
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Re: Vizio E370VT no longer turns on
Sorry, forgot to add the photo.Attached FilesWilling to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
That's OK. When I test it I get varying 29.3-29.7Comment
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Re: Vizio E370VT no longer turns on
So is the voltage across those pins when it is running normally or when refusing to come on?Last edited by dick_barton; 01-21-2017, 03:44 AM.Willing to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
It's when it's not on. It just lights up the amber standby light and will not power onComment
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Re: Vizio E370VT no longer turns on
Disconnect the main board from the power supply.
Connect 1K resistor from 5V to PS_ON
Connect a 2nd 1K resistor from 5V to ON/OFF
Do you have 12V, 24V and DIM= xxV
What voltage between the two legs of C9803 (was 170V)
What voltage between pins 3 & 5 of IC9301 (was 29V)Willing to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
I'll have to get some resistors ordered. I don't have any laying around.
Looking at Digi-Key is it better to get metal or composite film? Tolerance 1% or 5% better? And it looks like there are different wattages (.125 and up)Last edited by jason424; 01-23-2017, 08:41 AM.Comment
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Re: Vizio E370VT no longer turns on
Have the resistors handy now. How do you "connect" them to the pins? Little solder or ?Comment
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Re: Vizio E370VT no longer turns on
You can either solder them on the underside of the board or push them into the mainboard end of the connector from the power supply (as long as you ensure you have the correct pins).Willing to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
Ok. Have the board out and the resistors installed. Now board needs to go back in and reconnect power supply to test the voltages stated above?Attached FilesComment
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Re: Vizio E370VT no longer turns on
Make sure the resistor leads do not rest on the chassis when you put the board back in. Do not connect the main board. Power up and check all your voltages are present and backlights come on.Willing to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
OK I have:
5v: 5.2
5v: 5.2
PS_ON: 4.8
ON/OFF: 5.1
The rest were 0.00
C9803 (was 170V): 171.7-172.0
IC9301 (was 29V): 12.2-12.3Comment
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Re: Vizio E370VT no longer turns on
So you don't have the 12V or 24V supply anymore?
Do your backlights come on?Last edited by dick_barton; 01-30-2017, 12:09 PM.Willing to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
No 12v or 24v, and no amber standby light. And no backlight.Comment
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Re: Vizio E370VT no longer turns on
Can you find / download a schematic for your power supply board. It looks like the PFC circuit is not working. Without a schematic it's difficult to offer any further advice.
Take your time and do the following:-
Check all your diodes with your meter set to diode mode and place your probes across the diode. They should read OL one way and approx 0.5 when you swap the probes across them.
You can also check the mosfets to make sure there is not a short (0 ohms) or low resistance across any of their 3 pins.Willing to help but I'm no expert.Comment
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Re: Vizio E370VT no longer turns on
I couldn't find a schematic. I ordered a replacement power supply board and installed today. I get the amber standby light but pressing the power does nothing. I tested the voltage and get 125.1 coming in from the outlet. Other numbers are:
ON/OFF: .1
Dim: .1
12V: 12.3
12V: 12.4
GRD: 0
GRD: 0
GRD: 0
24V: 25.3
24V: 25.3
PS_ON: 4.8
5V: 5.2
5V: 5.2
I can hear a faint high pitched hum/buzz which I never got before so we're getting somewhere...can't tell if the sound is coming from the LED driver board or the power supply board.Last edited by jason424; 02-03-2017, 02:28 PM.Comment
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Re: Vizio E370VT no longer turns on
"ON/OFF: .1
Dim: .1"
Main board is not sending those two signals for the Backlights circuit.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 E370VT no longer turns on
Hi Bud, so is this something that can be tested/rectified easily or am I looking at a main board too?Comment
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Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated. -
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... -
Ok so here's the story. I was watching tv one day when all of a sudden I heard a pop from the back of the tv set and rushed to unplug the set. By this time the tv already had smoke coming out the back. It was not storming or inclement weather that day to cause a power surge to the best of my abilities. When I opened the tv up, I found that the three capacitors on the psu (highlighted in red) were all bulging and looked they had exploded. I replaced all of them right away and when I went to start up the tv after the "fix" it started just showing the flashing vizio logo as soon as power... -
Have vizio E60u-D3. No standby light. Have searched and read all D??u-D3 posts. posts with same symtoms fixed by new power supply, one guy needed back lights also.
main boards are kinda spendy and, out of stock alot of places. i would like to fix my board.
PS voltages
1 VSNS -2mV
2-5 LED-OUT -2mV
6-10 GND -2mV
11 +16VS 16.29V
12 AC-DET 3.929V
13PS-ON -3mV
14 +16VS 16.29V
15 +16VS 16.29V... -
I have a Vizio E550i-A0 that will not power on. It also does not display the standby light in the corner. I disconnected the main board cable to see if the backlights would light but they did not (maybe this is normal for this set?). I checked the voltages on the plug and they all read in mV or 0, so there's no voltage there. The fuses are ok, and the voltages of the 450v caps read about 160v. I see no visual damage on either the power supply or main board. I have read online that the main board is usually the culprit in this model, but not getting backlights with the main disconnected makes me...
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