Does anyone know what this small circuit board does? a ribbon cable runs from this to the T-Con Board. Thanks.
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Re: Vizio 42" LED Power Supply with small green circuit board.
It is power supply board with the LED backlights power supply to the right of the board, you can see two multi-pin connectors that go to the LED string assembly, it has 12 switching power supplies (current source) as you can see by the 12 inductors close to the connectors for the LEDs. You can also see 12 MOSFETs next to the inductors, for 12 strings of LEDs (There are 12 Feedback pins: FB1 ~12).
There should be some printing on the board telling you what the drive voltage for the LEDs will be.
The pictures is not focused enough to read the printings on the board.
http://www.shopjimmy.com/vizio-0500-...t-inverter.htmLast edited by budm; 11-08-2012, 11:15 PM.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=24809 -
Re: Vizio 42" LED Power Supply with small green circuit board.
I mean the little green circuit board that's mounted to this power supply board, the little board is marked DC-3308 it has a ribbon cable connector at one end and that ribbon cable goes to the T-Con Board also at the other end of this small board is a connector labeled "Writer" with nothing plugged into it. Thanks.Last edited by MisterD; 11-09-2012, 09:53 AM.Comment
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Re: Vizio 42" LED Power Supply with small green circuit board.
OK, I see. Will have to do more research on that.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 42" LED Power Supply with small green circuit board.
It's used in my 42" Vizio I'm still working on, you can go here if you like and see.
Thanks.
https://www.badcaps.net/forum/showthread.php?t=23784Comment
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Re: Vizio 42" LED Power Supply with small green circuit board.
I saw that you have order the T-CON board, so I hope that will fix it. I am beginning to learn more about LED TV power supply circuit that supplies the power to the LEDs.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 42" LED Power Supply with small green circuit board.
The little green board is the multi-zone dimming controller. It controls each of the LED boost converters.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
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Re: Vizio 42" LED Power Supply with small green circuit board.
So the command signals come from the T-CON, that will make sense, and also expalin why it has 12 LED drivers.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 42" LED Power Supply with small green circuit board.
Yeah, it is supposed to improve contrast ratio, but since each block represents 480x360 pixels it's not very effective. But it is a good way to artificially boost the contrast ratio on test images.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
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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... -
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
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Normally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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This board attaches to 2 12v batteries in tandum (Black/Red squares). There is a 24v power supply that attaches at the 2 pin molex connector (circled in red). I need help to determine which components run the charging circuit in an effort to determine a point of failure. There are multiple via's, making it difficult to trace the circuit. Nothing appears to be shorted but I wasn't able to fully test as I do not have 2 12v batteries available. My assumption is that the micro controller (red question mark) determines when to turn the charging circuit on & off. I'm pretty sure a regulator and...
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