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?". 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