Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
Recapped the PS1012 board no difference, then recapped the rest of the Ysus, and no diff. either, darn it. I seem to be chasing my tail here :-)
Upon re-looking at the 16274 post, PlainBill talked about checking Vy with the Zsus unplugged and plugged in. Not sure exactly what is accomplished by doing so, but can say the Vy is too low (-234V) with the Zsus plugged in, and takes a while to come up to -201V. With the Zsus uplugged, Vy is -200.4V right off the bat, no variances.
I performed the Vs (186.2V)...
nickelflipper
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Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
I see that now, here was the post [url]https://www.badcaps.net/forum/showthread.php?t=16274[/url]
Don't see that it was ever resolved. I am pretty sure that the board that supply's the -Vy is the PS102 board, both boards seem to be constructed the same. There are 3 Samwha 10uf 400V caps per board, and a smaller one that I can't read at the moment.
I think I will try to recap the small board, and if it doesn't work, then replace the Ysus board.
P.S. Samwha RD series are only 2000 Hr rated [url]...Leave a comment:
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Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
Not sure about the Ramp_Up pot, can't find it on the PDP42X3#### YSUS. Here is the link I had, [url]http://www.scribd.com/doc/7580885/LG-TV-Plasma-Training-Manual[/url]
The slow startup seems to be bad caps on the -Vy daughtercard, or Vs input, on the Ysus board. -Vy goes from -234V on startup (bad picture), then settles down to -201.7V (-200V spec) after warmup (good picture). The pot is really touchy on the -Vy, it jumps from -186V to the -201.7V when the set is warmed up. Here is a similarly stated problem and...Leave a comment:
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Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
O.K. adjusting the Vsetup, Vsetdn has gotten rid of flashing pixels in the white areas, after the set has warmed up, very nice. Still has the greenish pixel problem when set is cold though, will play with the pots some more. The power supply board had been recapped, and didn't make any difference, so maybe the caps on the little Vsetup, Vsetdn daughter cards, or...?
The main board was replaced, and the burst of static over the speakers is gone. By the way, this condition happened when a large part of the screen...Leave a comment:
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Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
Since I don't have a scope, is there any harm having a friend look at the screen while I twist the Vsetup or Vsetdn pots (after first marking the current position). Is there a preferred sequence?...Leave a comment:
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Re: Replacement Screens? Where to Look?
I have a friend that could be interested in the main and control boards for a Vizio P42HDTV10A if interested in parting out. See [url]https://www.badcaps.net/forum/showthread.php?t=17936[/url]Re: Replacement Screens? Where to Lo...?t=17936[/url]...Leave a comment:
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Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
Yes, there is good audio, with the occasional burp of static out the speakers, like once in an hour or more, or twice in a few minutes was heard once. There is a still a Taicon 1000uf 16v, and a smaller one in place on the main board. No outward signs of distress, but should probably replace anyway. Replaced a Taicon 1000uf 16V on the tuner board, it was shot.
Will replace the mainboard Taicon(s) tomorrow and report back.
observed/sticker voltages
Va 60/60, Vs 187.6/186, Vsc 120/120, -Vy -200/-200,...Leave a comment:
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Re: Vizio 42" Plasma P42HDTV10A Has Slow Startup
@tom66
So you are saying the Control board is suspect, because it supplies the timing to the Ysus board fets? Is the control board a common failure for these screens?Leave a comment:
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Vizio 42" Plasma P42HDTV10A Has Slow Startup
Trying to fix a Vizio (P42HDTV10A) 42" Plasma tv, which in turn uses an LG PDP42X32000 screen and associated driver boards. Replaced a few caps that were bulging.
With this model you can short a couple pins on the AUTO GEN plug to display an internal pattern, and I did so. Patterns were fuzzy/snowy for several minutes and slowly got better and better till a decent picture/pattern arrived. Pulled the test and hooked up a Direct tv box, and have the same thing, slow startup till decent picture. On occasion, a loud burst of static over the speakers happens.
Took...
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