Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Yeah im glad to have it working, the place i bought is holding a core charge which is to bad if that was not the case I would have definetly dontated for the cause.
Crimsonmt
Senior Member
Last Activity: 01-15-2013, 11:06 AM
Joined: 03-24-2012
Location: Rocklin, ca
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
So part came in replace ps board and everything is back up and running. Thanks budm for putting up with me. This forum is a great for help and I will definitely be back.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Tracking part now estimated delivery tues 4/10. Will post results when I get it and install.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
So I buckled and decided to buy the power board there was only 1 in stock so I did not want to miss out on it. It was 89 +core so once I get that in we will see if it was worth it.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
I was going to but had other things to test first, need to go get the resistor and give that a shot. Hopefully I can find a 1k resistor tomorrow.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
So there is no way to power the board on if it's not fully plugged into the main board and grounded to the chassis?Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
But I should be able to jump the 5v to the ps-on with a 1k resistor, to power the board up but I don't know if that will work.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Yeah I knowLeave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Yeah I could get it for 109 plus core. I was thinking about buying to just test.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
I will try and figure out how to power board upside down to test pins.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Just tested J16 and it was at 5.01Vdc, if i am reading the document you pointed me to that seems high, that is if J16 actually is the top connection of VDDA. Document says 4.2V max, am I reading that right?Last edited by Crimsonmt; 04-04-2012, 08:21 PM.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
So I will need to test Pin 1 and pin 6 on the IC 301. It looks like pin 1 can be tested with J16 on the top does that look correct? But dont know how to test pin 6 from the top any ideas?...Last edited by Crimsonmt; 04-04-2012, 07:39 PM.Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Just tested the brown cap too which climbed out of range as wellLeave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
I just tested the MOSFEts and here are the results:
Top
S-G MM set at 20k its 9.07
MM set at 20M
S-D: climbs out of range
D-G: climbs out of range
Bottom
S-G MM set at 20k its 9.01
MM set at 20M
S-D: climbs out of range
D-G: climbs out of rangeLeave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
So I will test the Mosfets now should i test the gate transformer as well?...Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Sweet thanks I will look it over and see if I can make sense of the documentLeave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Here is the info off IC 301:
MSC
LX16921DW
0844CLeave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
So i found this page for IC fan7602
[url]https://cdn.badcaps-static.com/pdfs/e03c9ac6c68464dfcc88bc02ce845453.pdf[/url]Re: Vizio SV420XVT1A LCD 2 Seconds t...5453.pdf[/url]Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
Uploaded photos, bottom shot is a little blurry but the concept is there...Leave a comment:
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Re: Vizio SV420XVT1A LCD 2 Seconds to Black
It looks like it goes to a ZD202 on the top. So i should be able to test the one side of the diode to check the VCC.Leave a comment:
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