How big and how close are the non magnetically shielded stereo speakers that are sitting next to it? Russ Hoyt Hoyt's TV Exeter, NH ----- Original Message ----- From: "peter" <pe.kow@xxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Thursday, September 02, 2004 10:34 PM Subject: [TechAssist] Re: Hitachi 50UX58B Green Convergence(update) > Would it be possible to have a bad shadow mask Peter Kowalik > pe.kow@xxxxxxxxxxxx Keith's Stereo Burl ON > > -----Original Message----- > From: techassist-bounce@xxxxxxxxxxxxx > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Jim Shupe > Sent: September 2, 2004 9:45 AM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Hitachi 50UX58B Green Convergence(update) > > Hey Alvie, everyone.... > > To update my previous post, I'm offering the > following: > > I neglected to mention that before I posted the > request, I had swapped the yoke leads first > (convergence, red & green), then the deflection yokes, > and finally I physically swapped the yoke assemblies, > all with the result that GREEN was always the > offending color. > > After I posted my request at lunchtime (I come home > and take my shoes off for forty minutes), I put the > yokes back to original and played with the green again > for a while... and DUH!!, I realized that I had > forgotten to check the pattern with no correction > applied... I unplugged the green convergence yoke and > saw that the distortion was still in the same corner. > The only conclusion I can make after all this is > that the green tube is defective. I can't, though, > understand WHAT about the tube could be causing this > problem. Can anyone see anything I've missed? > > Thanks to Alvie for the succinct response to my > post..I think I covered the same territory but in a > less efficient manner, maybe. > > BTW...I didn't consider any of the mechanical > adjustments because they were all still "doped" from > the factory... and customer said the problem developed > a few weeks before the set went dead. > > If anyone sees a defect in my reasoning, please > respond so I don't order a tube and embarass myself. > > TIA, > Jim Shupe, CET > Lloyd's TV > Yucca Valley, CA > > > > --- "Alvie Rodgers C.E.T." <rodgers@xxxxxxxxx> wrote: > > > Hey Jim: > > > > First check and be sure the > > "Beam Shape" > > and "Beam Alignment" adjustment > > magnets are set up correctly. > > Affects outside edges. > > > > Clear the RAM and check for Red and Blue Offsets. > > > > If no help, > > > > Do not SAVE to ROM before you're sure what I'm > > suggesting works. > > If after all my suggestions below have no effect, > > then simply turn the power > > off > > and back on and you'll return to the old settings. > > > > Clear the RAM, then Read the OLD ROM data, > > then enter the 3X3 mode. > > Adjust the center (1 point) and outsides (8 points). > > Can your correct. > > > > Continue with 5X7 mode. > > > > Use the Calculate function often. > > > > Finally you'll have to make a comparison for the > > adjustment point (location) > > using > > a different CRT and Yoke assembly. > > Do this simply by swapping the Yoke Plug for the Red > > and Green. > > > > Do not pay attention to the fact that the > > convergence is completely out, > > just > > pay attention to the location. While adjusting > > Green, look at the Red in the > > same location that doesn't adjust correctly now in > > green. > > If you can adjust Green and see the Red functioning > > correctly in the same > > location, > > then it's a conv. yoke problem. > > If the problem stays the same, you'll at least know > > the problem is either in > > the circuit > > or the DCU. > > > > After that, if it's not the yoke, swap the GH and GV > > signals from the DCU > > with the RH and RV. > > Now by adjusting Red observe the Green in the area > > of fault. > > Can you correct? > > Yes, your DCU is defective. > > If no, the you've isolated it to the Output section > > from the DCU to the > > Yoke. > > > > *************************************************** > > Don't forget to check the Hitachi Web Site > > for any additional information: > > http://www.hitachiserviceusa.com > > > > If this information helps in any way and/or you > > repair the unit, > > please POST your findings so that all can benefit > > from your > > experience. > > "Let's work together". > > > > Alvie Rodgers C.E.T. > > Technical Writer/Trainer > > Hitachi Home Electronics > > > > *************************************************** > > ----- Original Message ----- > > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx> > > To: "Alvie Rodgers C. E. T." <rodgers@xxxxxxxxx>; > > <jim@xxxxxxxxxxxxx> > > Sent: Thursday, September 02, 2004 6:05 AM > > Subject: Hitachi Model 50UX58B green convergence > > > > > > Jim, > > I am forwarding this to Alvie Rodgers from Hitachi > > to see what he has to say > > about it. > > > > Bob Waterman, CET. #RI-28 > > Master Technician License #9109 > > Service Manager / Parts Manager > > Gemini Computer, TV, & Security Alarms > > (508)695-7302 > > (508)695-7769 FAX > > geminitv@xxxxxxxxxxx > > geminitv@xxxxxxx > > www.geminicomputertvsecurityalarms.com > > > > > > ----- Original Message ----- > > From: "Jim Shupe" <jim@xxxxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Wednesday, September 01, 2004 4:01 PM > > Subject: [TechAssist] Hitachi Model 50UX58B green > > convergence > > > > > > > Hi All.... > > > > > > > > > I have a 50UX58B that came to me with just the > > lower > > > right corner out of convergence. I changed the STK > > and > > > one resistor that had increased in value...but no > > > help. > > > > > > The green also looks thick and out of focus at > > that > > > corner, and appears to have hysterisis around the > > > corner point: that is, when I adjust the line(H or > > V) > > > toward alignment, it approaches, then will swing > > too > > > far past correct position. > > > > > > The degree of distortion appears to be related > > to > > > screen content as well...it moves in and out of > > the > > > corner with scene changes, etc. > > > > > > Has any one seen this or anything similar with > > this > > > set? > > > I talked to Hitachi and the tech said "sorry... > > no > > > silver bullet here." > > > > > > > > > TIA > > > Jim Shupe, CET > > > Yucca Valley, CA > > > > > > > > > > > > > > -------------------------------------------------------------------------- -- > - > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.745 / Virus Database: 497 - Release Date: 27/08/2004 > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.745 / Virus Database: 497 - Release Date: 27/08/2004 > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". 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