Mine were arcing in the focus lead cavity. One I replaced the socket and one I reseated and filled with high voltage insulator. Both are still OK. Al Marquardt ampm@xxxxxxx Al Marquardt Electronic Repair 206 W Main Girardville Pa. 17935 ----- Original Message ----- From: "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Wednesday, April 07, 2004 1:24 PM Subject: [TechAssist] Re: RCA Flyback 237506(fixed!) > The first & only one I had came in with a bad IHVT. At first, I let myself > get in a hurry, and "fixed" the socket by cleaning the carbon out of it. > A week later, the IHVT failed. I don't believe it was related, but just in > case, I ordered a new socket. Set has been fine for about 3 weeks so far. > > John Myers > Myers TV Service Since 1984 > Alliance, OH > ph 330-821-6545 > ----- Original Message ----- > From: "al m" <ampm@xxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Wednesday, April 07, 2004 12:47 PM > Subject: [TechAssist] Re: RCA Flyback 237506(fixed!) > > > > I've run into this problem twice with arcing CRT socket. How did you > remedy > > problem with replacement CRT socket? > > Al Marquardt > > ampm@xxxxxxx > > Al Marquardt Electronic Repair > > 206 W Main > > Girardville Pa. 17935 > > ----- Original Message ----- > > From: "Jim Myers" <jr.myers@xxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Wednesday, April 07, 2004 11:03 AM > > Subject: [TechAssist] Re: RCA Flyback 237506(fixed!) > > > > > > > Jim, the model and chassis numbers are important because that's how tips > > > are filed and the problem you have fixed is common to the CTC197 > > > chassis, I have had at least 4 and at least 3 or 4 have been posted on > > > this list recently. This failure COULD of course happen on any set, but > > > for some reason it happens on CTC197 as a matter of course. That's why > > > the subject line should always contain the brand, model and chassis > > > information. > > > > > > **************************************************************************** > > *************************************** > > > Since 1972 > > > Jim Myers > > > Telrad Electronics > > > Fort Wayne, Indiana > > > > > > > > > Jim Shupe wrote: > > > > Phillip.. > > > > > > > > The chassis and model are really not important, as > > > > the problem was really a generic type...that is, not > > > > brand, model, or chassis-specific in nature. > > > > > > > > The chassis in question was CTC197, I believe. > > > > > > > > At any rate; I correctly diagnosed the original > > > > fault as a shorted IHVT, but failed to properly > > > > isolate and locate the cause of missing screen supply > > > > with the replacement IHVT, which was a shorting > > > > spark-gap in the CRT socket. I wrongly assumed the new > > > > part was defective. Reading too many stories about > > > > counterfiet parts, I guess. > > > > > > > > My point about the "generic" nature of the fault is > > > > that every CRT-equipped television uses the same > > > > approach to interface the tube to the chassis; > > > > therefore the design, and hence the failure, is not > > > > unique to any manufacturer, chassis, or model. > > > > > > > > Jim Shupe, CET > > > > Lloyd's TV > > > > Yucca Valley, CA > > > > > > > > > > > > --- "Phillip R. Hull" <phil245@xxxxxxxxxxxxx> wrote: > > > > > > > >>I sure would like to know what was fixed Chassis > > > >>#?? > > > >>Phillip R Hull STET > > > >>phil245@xxxxxxxxxxxxx > > > >>FAX 517--569-3075 > > > >>Professional Technicians only > > > >>----- Original Message ----- > > > >>From: "Jim Shupe" <jim@xxxxxxxxxxxxx> > > > >>To: <techassist@xxxxxxxxxxxxx> > > > >>Sent: Tuesday, April 06, 2004 4:13 PM > > > >>Subject: [TechAssist] Re: RCA Flyback 237506(fixed!) > > > >> > > > >> > > > >> > > > >>>John... > > > >>> > > > >>> This is a newer foil pattern that doesn't have > > > >> > > > >>the > > > >> > > > >>>jumper... I've never had one inadvertently come > > > >> > > > >>off > > > >> > > > >>>with my solder-sucking anyhow, but I've read the > > > >> > > > >>sheet > > > >> > > > >>>that comes with the part. > > > >>> > > > >>> I guess I just had a brain fart last week and > > > >> > > > >>missed > > > >> > > > >>>the most elemental possibility(which you pegged). > > > >> > > > >>The > > > >> > > > >>>last shorted CRT spark-gap short I had was on a > > > >> > > > >>fairly > > > >> > > > >>>new Zenith Chroma Color II, so I guess it drifted > > > >> > > > >>out > > > >> > > > >>>of my head as a possibility. > > > >>> > > > >>> I checked with my ohmmeter when I got to the > > > >> > > > >>shop > > > >> > > > >>>this morning and couldn't detect the short, but > > > >> > > > >>when I > > > >> > > > >>>lifted the 2.2K series resistor to the G2 land, I > > > >> > > > >>got > > > >> > > > >>>screen supply(I should have done that last week- I > > > >>>know better!). Once I removed the socket, I could > > > >> > > > >>see > > > >> > > > >>>the burn on the board, on the socket at G2 and at > > > >>>ground. > > > >>> > > > >>> Anyway the set's fixed, I feel properly > > > >> > > > >>chagrined, > > > >> > > > >>>and the customer's happy. > > > >>> > > > >>> Thanks for the tip, John, and thanks to > > > >> > > > >>everyone > > > >> > > > >>>else who took the time to respond. > > > >>> > > > >>> Jim Shupe, CET > > > >>> Lloyd's TV > > > >>> Yucca Valley, CA > > > >>> > > > >>> An > > > >>> > > > >>>--- "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx> > > > >> > > > >>wrote: > > > >> > > > >>>>Jim, > > > >>>> > > > >>>>I just changed one since I e-mailed you. > > > >>>> > > > >>>>There is a chip jumper between pins 7 & 8 of the > > > >>>>fly. No video is one of the > > > >>>>symptoms if the jumper is missing. > > > >>>> > > > >>>>John Myers > > > >>>>Myers TV Service Since 1984 > > > >>>>Alliance, OH > > > >>>>ph 330-821-6545 > > > >>>>----- Original Message ----- > > > >>>>From: "Jim Shupe" <jim@xxxxxxxxxxxxx> > > > >>>>To: <techassist@xxxxxxxxxxxxx> > > > >>>>Sent: Tuesday, April 06, 2004 10:36 AM > > > >>>>Subject: [TechAssist] Re: RCA Flyback 237506 > > > >>>> > > > >>>> > > > >>>> > > > >>>>>John.. > > > >>>>> > > > >>>>> No, this one doesn't have the jumper. I am > > > >> > > > >>going > > > >> > > > >>>>to > > > >>>> > > > >>>>>check the CRT socket though, as it's still > > > >>>> > > > >>>>connected. > > > >>>> > > > >>>>> Thanks for the input! > > > >>>>> > > > >>>>> BTW.. the original was shorted, but still > > > >> > > > >>rang > > > >> > > > >>>>good > > > >>>> > > > >>>>>with my trusty Heathkit ringer. I think this > > > >> > > > >>is > > > >> > > > >>>>common > > > >>>> > > > >>>>>with this family of IHVT's. > > > >>>>> > > > >>>>> Jim Shupe, CET > > > >>>>> Lloyd's TV > > > >>>>> Yucca Valley, CA > > > >>>>> > > > >>>>> > > > >>>>>--- "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx> > > > >>>> > > > >>>>wrote: > > > >>>> > > > >>>>>>Jim, > > > >>>>>> > > > >>>>>>I just had one like that that turned out to > > > >> > > > >>be a > > > >> > > > >>>>>>shorted CRT socket. > > > >>>>>>Also, is this the one that has the jumper > > > >>>> > > > >>>>between > > > >>>> > > > >>>>>>the two pins on the fly? > > > >>>>>>those have a nasty habit of "disappearing" > > > >> > > > >>while > > > >> > > > >>>>>>resoldering. > > > >>>>>> > > > >>>>>>John Myers > > > >>>>>>Myers TV Service Since 1984 > > > >>>>>>Alliance, OH > > > >>>>>>For Professional Technicians ONLY > > > >>>>>>ph 330-821-6545 > > > >>>>>> > > > >>>>>>----- Original Message ----- > > > >>>>>>From: "Jim Shupe" <jim@xxxxxxxxxxxxx> > > > >>>>>>To: <techassist@xxxxxxxxxxxxx> > > > >>>>>>Sent: Tuesday, April 06, 2004 10:11 AM > > > >>>>>>Subject: [TechAssist] RCA Flyback 237506 > > > >>>>>> > > > >>>>>> > > > >>>>>> > > > >>>>>>>Hey Guys... > > > >>>>>>> > > > >>>>>>> Has anyone had problems lately with this > > > >>>>>> > > > >>>>>>part(new) > > > >>>>>> > > > >>>>>>>or am I just getting dumb in my old age? > > > >>>>>>> I have installed two new IHVT's in this > > > >> > > > >>set > > > >> > > > >>>>and > > > >>>> > > > >>>>>>both > > > >>>>>> > > > >>>>>>>had no screen voltage output. The heaters, > > > >> > > > >>HV, > > > >> > > > >>>>>>>secondary supplies are all there. > > > >>>>>>> To my knowledge, the screen output is > > > >>>> > > > >>>>totally an > > > >>>> > > > >>>>>>>internally derived voltage(at least in > > > >> > > > >>RCA). > > > >> > > > >>>>>>> BTW.. I removed everything from the > > > >> > > > >>screen > > > >> > > > >>>>>>output to > > > >>>>>> > > > >>>>>>>eliminate possible shorts. > > > >>>>>>> > > > >>>>>>> This has me baffled as I have never had > > > >> > > > >>a > > > >> > > > >>>>>>problem > > > >>>>>> > > > >>>>>>>with a new RCA fly. > > > >>>>>>> > > > >>>>>>> > > > >>>>>>> Jim Shupe, CET > > > >>>>>>> Lloyd's TV > > > >>>>>>> Yucca Valley, CA > > > >>>>>>> > > > >>>>>>> > > > >>>>>> > > > > > > > -------------------------------------------------------------------------- > > > > > > > >>>>>>--- > > > >>>>>> > > > >>>>>>>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?". > > > >>>>>>Email Archives: > > > >>>>>> > > > >> > > > >>//www.freelists.org/archives/techassist/ > > > >> > > > >>>>> > > > >>>>> > > > > > > > -------------------------------------------------------------------------- > > > > > > > >>>>--- > > > >>>> > > > >>>>>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?". > > > >>>>Email Archives: > > > >>>>//www.freelists.org/archives/techassist/ > > > >>> > > > >>> > > > >>> > > > > > > > -------------------------------------------------------------------------- > > > > > > > >>--- > > > >> > > > >>>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?". > > > >>Email Archives: > > > >>//www.freelists.org/archives/techassist/ > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > --- > > > > 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?". > > > Email Archives: > > > //www.freelists.org/archives/techassist/ > > > > > > > > > > > -------------------------------------------------------------------------- > --- > > 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?". > Email Archives: > //www.freelists.org/archives/techassist/ > > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". 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