Re: Vizio VO320E Bad Power Supply Board?
OK, do you wish to repair the PSU or just swap it?
OK, do you wish to repair the PSU or just swap it?
-
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Vizio VO320E Bad Power Supply Board?
I'm learning and enjoying it. If you could guide me I'd love to fix it!Last edited by alja; 08-17-2013, 03:04 PM.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
OK, do you see any output labelled 24V, or another voltage different from 5V or 12V?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
nope, only 5v and 12vComment
-
Re: Vizio VO320E Bad Power Supply Board?
I'm sure that you did but make sure that the PSU is completely isolated from the other boards when testing the voltage output of the PSU not just the main board.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
Can you check the voltage across this capacitor? Be very careful not to let the probes slip. You are working on the high voltage primary side of the power supply, which carries an electrocution risk.
The voltage should be checked in standby (logo orange) and switched on (logo white) with the other boards connected up.
The only loads connected to this appear to be the main board. The inverter is built in, using high voltage driven design.Attached FilesPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
-
Re: Vizio VO320E Bad Power Supply Board?
Do I measure this with the meter in DC?Comment
-
Re: Vizio VO320E Bad Power Supply Board?
Yes, sorry for not clarifying.
Expect 160~170V in standby, and around 400V in operation.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
No problem, I test it with the meter in DC at 1000 and the reading were the same for stand by (amber logo) and on (white logo) at 175v-176v I also had all the board connectedComment
-
Re: Vizio VO320E Bad Power Supply Board?
OK, this indicates a PFC fault.
Across the red ringed capacitor please measure the voltage across it. Expecting 10V to 25V.
For the blue area, please post a picture of under the heatsink the best you can.Attached FilesPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
-
Re: Vizio VO320E Bad Power Supply Board?
ok, the measure was 20v standby and 22 ON. About the picture, do I need to remove the heatsink? or the best I can without removing itComment
-
Re: Vizio VO320E Bad Power Supply Board?
Is it closed off on both sides? Can you see anything under it?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
well here the pics I could take, I think they cover pretty much everything under it but let me know if you need a specific area.Attached FilesLast edited by alja; 08-17-2013, 05:00 PM.Comment
-
-
Re: Vizio VO320E Bad Power Supply Board?
OK, all I need to see was the PFC coil, which is there. So it confirms this board does use PFC.
At this point, can you remove the power board and take a picture of the bottom of it? The green side of the circuit board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
Here the best I could, I hope is clear enough, if not I could split it to give you more sharpenessAttached FilesComment
-
-
Re: Vizio VO320E Bad Power Supply Board?
Please test this diode.
To test: Power supply UNPLUGGED. Multimeter must be set to diode test mode. Red probe goes on one end, black on the other. Record reading. Then reverse probes, and record the reading.
Expecting: 400~800 one way, open circuit (usually shown as "1") the other way.Attached FilesPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
-
Re: Vizio VO320E Bad Power Supply Board?
The reading is the same in both ways 0.01. board unplugged from the outlet and other boardsComment
-
Re: Vizio VO320E Bad Power Supply Board?
Nice! First check and it's a dud. Pull it and test it out of circuit to be sure, but you've probably found the fault. Replace that diode with a new part... read the part # off it and go to digikey.com to find a replacement. (Do not just use one that looks the same size...
)
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Vizio VO320E Bad Power Supply Board?
wait, I measure the other diode that is next to this one the D802 and gave me the same reading both way, .001 starts at 500 but ends at .001, is it bad too? so I need to replace it?Comment
-
Re: Vizio VO320E Bad Power Supply Board?
That diode being bad will make the other look bad too, because they're effectively in parallel (except one goes through an inductor, forming part of the boost converter circuit.) To be sure you can remove both from the circuit and test them, but it's much rarer for that other diode to fail and it usually only causes slightly higher standby power consumption (and no other bad effects.)
Actually you can also just lift one leg of each so they stay on the board and you know which is which.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
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... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
-
Hi There,
This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.
After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.
More Details
TV Model - LG OLED77G1PUA
Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt... -
I have a Panasonic TC-P54VT25 that will power on and prime the display but there is no image at all.
The panel is primed as there is a slight glow from the entire panel. This means the problem should be logic related. The service manual also confirms this and recommends replacing the A or the D board.
I have tried to get the TV to display the test sequence but I have been unable to and I don't even know if this TV has a test sequence or not. I tried following tom66's instructions in post #3 on this thread https://www.badcaps.net/forum/showthread.php?t=26790. There was...
Comment