Glad you got yours working. I am leaving tomorrow to go back to school, break's over
. I'll have to wait until the school year's over before I can work any more on this. I'll bump the thread then and see if I have any new ideas.Thanks
Ayelix
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Last Activity: 03-12-2011, 08:35 PM
Joined: 03-05-2011
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Re: Vizio VX32L turns on with backlight, no video or sound
Glad you got yours working. I am leaving tomorrow to go back to school, break's over. I'll have to wait until the school year's over before I can work any more on this. I'll bump the thread then and see if I have any new ideas.
Thanks -
Re: Vizio VX32L turns on with backlight, no video or sound
Yep, no change on mine. It looks like all the voltages are correct, is there another part of the board I should look at?Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
Here are my readings using the board ground instead of pin 1 of the regulators. Nothing looks wrong here. Also, it all matches the correct values in the DC-DC troubleshooting section of the VW32L service manual.
[CODE]Component SB out SB in ON out ON in
U10 0 0 2.62 4.99
U7 0 0 1.24 3.29
U9 0 0 1.49 3.29
U33 0 0 3.3 5
U8 3.3 5 3.3 5.04
U2 0.12 0 3.33 5
U4 0 0 3.28 5
U3 0 11.93 Pin 1
U3 0 5.02 Pin 3
U1 0 ? 5 ? Pins 1,3,5,6,7,8...Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
Should I be using the board ground with the adjustable regulators and pin 1 for the fixed regulators? If that is the case then all readings should just be taken using board ground right?
Thanks for the help.Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
I took all my readings today. It seems that the inputs for almost all the 1117 converters are low, ~3V instead of 5V. I recorded the standby (SB) in and out voltages and the power on (ON) in and out voltages. Pin 1 was used as ground, the larger tab (connected to pin 2) was used for out readings, and pin 3 was used for in readings.
[CODE]Component SB out SB in ON out ON in
U10 0 0 1.25 3.62
U7 0 0 1.24 3.29
U9 0 0 1.24 3.04
U33 0 0...Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
I have not touched it since I made the post. Tomorrow I will take readings of all the DC-DC converters on the board and record my results.Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
1simtime, according to cadiman and the vw32l service manual, U33 is supposed to be at 3.3V and U7 is supposed to be at 1.2V. U9 however is not mentioned in the service manual. It looks like U33 may be the problem as it may be providing the input for U7 and U9 which is supposed to be 3.3V. This is just a guess though. Someone with knowledge of these components could confirm this.Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
I have checked all of my DC-DC converter voltages and the power supply input on the main board. I can check them all again and record my readings to compare to someone else's readings if that would help me or 1simtime.Leave a comment:
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Re: Vizio VX32L turns on with backlight, no video or sound
When I said I followed the troubleshooting for the DC-DC converters, I meant those on the mainboard. I also read to check U9 in another thread and it is at 3.3V.Leave a comment:
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Vizio VX32L turns on with backlight, no video or sound
Hello,
I have the same problem as described in the thread [URL="https://www.badcaps.net/forum/showthread.php?t=10924"]here[/URL]. My Vizio VX32L turns on with the power button, the light changes from amber to white and the backlight comes on, but there is no sound or video (only black screen). I have read the thread linked above and followed the troubleshooting for DC-DC converters in the V[B]W[/B]32L manual ([URL="http://www.waca.com/docs/Vizio/ServiceManuals/VIZIO%20VW32L%20HDTV10A%20Service%20Manual.pdf"]here[/URL]) with no success. The VW32L manual is the most similar...
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