Okay this is a 50" Plasma Television. The TV powers on I have sound on all inputs. The Picture though is terrible and transitionally fades into existence only after considerable warm up. The picture when it finally comes up ends up patchy with a fuzzy appearance and sometimes patches are missing other times they are not. The picture is always darker than it should be.
Vizio P50 HDTV20A
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Re: Vizio P50 HDTV20A
Definitely looks like a Psu cap to me . Even if the look good my bet is there is a bad one on the board. I have repaired two of this exact model and both had a cap that looked fine but upon further testing/replacing it was a Psu cap. Fluctuating voltage causes this condition because of a bad capacitor.Comment
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Re: Vizio P50 HDTV20A
I did find one bad cap on the xmain a smaller one. I replaced it but it did not fix the problem. I have noted a high pitch noise coming from the powersupply right where another cap is. I guess I am going to start taking some readings to see what my voltage is. Any suggestions?Comment
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Re: Vizio P50 HDTV20A
Check the power to the Xmain and the fuses (1 ceramic, 3 green pico) on that board. There's a Vs and Ve test point on the PCB next to CN4701 where power enters.
Edit: Samsung manual added.Last edited by tw2005; 02-21-2014, 04:37 PM.Comment
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Re: Vizio P50 HDTV20A
Okay voltages going to xmain are 88.8, 88.8 ground ground 6.3 that is going from left to right on the power supply itself no cable connected. I have tried other settings on my volt meter but get 1 on all pins expect last pin which gives me 14. I am at a loss going back to possible power supply issue.Last edited by gideon277; 02-21-2014, 04:56 PM.Comment
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Re: Vizio P50 HDTV20A
Okay found a bad inline fuse on the x-main board just did a temporary jumper to test the theory and bingo it worked. I should be able to replace that fuse tomorrow and t.v will be working. I suppose I could just leave the jumper in place but I would rather fix it properly.Comment
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Re: Vizio P50 HDTV20A
Okay found a bad inline fuse on the x-main board just did a temporary jumper to test the theory and bingo it worked. I should be able to replace that fuse tomorrow and t.v will be working. I suppose I could just leave the jumper in place but I would rather fix it properly.Comment
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Re: Vizio P50 HDTV20A
I have a 20year fluke I picked up for $30 and it's excellent, ex government disposal.Comment
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