1990 Zenith horizontal width is too wide
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From: James Sweet on 10 Dec 2006 23:29 Charles Schuler wrote: > "Lee Haymond" <Lee.Haymond.2imdc8(a)nospamplease.com> wrote in message > news:Lee.Haymond.2imdc8(a)nospamplease.com... > >>There's almost a dozen pots on the board, none are marked. Can't find a >>schematic, how would one determine what to do without one? > > > You can experiment, but that would likely be very frustrating. Hope that > someone else posts with some hints. > > Don't even think of touching the pots! Modern TV sets don't just go out of adjustment, there's obviously a fault and if you start messing with the pots, no tech will be willing to touch the thing.
From: Dave Plowman (News) on 11 Dec 2006 05:19 In article <z85fh.1182$A05.139(a)trndny08>, James Sweet <jamessweet(a)hotmail.com> wrote: > Don't even think of touching the pots! Modern TV sets don't just go out > of adjustment, there's obviously a fault and if you start messing with > the pots, no tech will be willing to touch the thing. Reminds me of that old story about a valve radio brought in for repair - the customer says it worked fine until he hoovered out the dust and tightened up all the loose screws. -- *Growing old is inevitable, growing up is optional Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: Lee Haymond on 2 Jan 2007 23:55
David Naylor;2675414 Wrote: > Lee Haymond wrote: > > > I own a Zenith model SS1913W (Made in 1990) with a slight problem: > The > > horizontal width is too wide - cuts off lots of picture. No marked > > pots to set it. I don't work on TVs, but it seemed it was somthing > to > > do with the flyback Xformer. How would one set it? > > Thanks, Lee > > > > > with the age of that set is is most definatly drifting caps look > around > the fly area for puffy caps that set has seen its days cheaper to > by new Nothing seemed puffy. It seemed to make no noticeable difference when I swapped out 2 mylar caps, 1 between the H drive transistor's C & B, 1 between it's B & E. The E is connected to the heat sink & what looked generally like ground, C to the flyback x-fmr through a ferrite bead, the B to a small x-fmr, I'm guessing for drive step-up. I don't have a schematic, anyone got one? Am I looking at the right caps? -- Lee Haymond ------------------------------------------------------------------------ Lee Haymond's Profile: http://www.futurehardware.in/member.php?userid=286 View this thread: http://www.futurehardware.in/showthread.php?t=557342 Future Hardware - http://www.futurehardware.in |