Hold it!!!! Something wrong here---If the set had the wrong resistor how did it ever work when it was purchased new??????? Hollis Bates, field engineer-retired In a message dated 10/21/02 7:27:18 PM Eastern Daylight Time, dthunhurst@xxxxxxx writes: > > > > > Thanks to all that replied to me on this dog. The cure was r14109. It > aparently came from the factory with a 150k resistor and it should have > been > 750 ohm resistor. The set did not show any signs that this resistor was > tampered with by someone. > I guess r14103 must have been giving some problems at assembly and the > factory must have used a select resistor in that circuit to make it > functional. That is the best assumtion I can come up with. Hard to belive > this set worked for a couple of years like that. Perhaps this is one > reason > the chassis number in the set was different that what was labled on the > back. > I hate DOGS like that one because you are looking for something defective > rather that a wrong part. > Tomorrow I say good-bye to this one and hope I don't see it again for a > mighty long time. > Again, thanks to everyone for the valuable help. > Daryl > Daryl's TV > 3310 Dyer St. > El Paso, TX 79930 > 915-565-9184 > 915-564-1024 Fax > http://dynacomp.freeyellow.com > > ---------- Original Message ---------------------------------- > From: "miglinasj" <miglinasj@xxxxxxxxx> > Reply-To: techassist@xxxxxxxxxxxxx > Date: Fri, 18 Oct 2002 18:23:08 -0500 > > > > > Hello Daryl, > > > > Partsfinder lists R14109 as 750 ohm on both CTC203CE1 or CTC203CX > modules. > >Maybe this is your problem. If it isn't, could it be possible that R14103 > >that you replaced is opening up under a load? I would change this again > and > >hard wire the resistor to its next connection to sure. > > > > Jonas > > Miglinas TV > >----- Original Message ----- > >From: "D Thunhurst" <dthunhurst@xxxxxxx> > >To: "techassist" <techassist@xxxxxxxxxxxxx> > >Sent: Friday, October 18, 2002 5:12 PM > >Subject: [TechAssist] UPDATE-CTC203, DEAD- No start up > > > > > >> > >> Update on this CTC203 set. > >> I am still having the same problem with this dog. > >> There is no start-up and no secondary voltages at all from the SMPS. > >> I have replaced, using OEM parts, the following: > >> r14103 1 meg (this was the first thing I found to be bad) > >> As recommended, I replaced.... > >> q14101 244223 > >> q14102 147665 > >> q14103 232218 > >> u14101 223653 > >> u14102 231525 > >> The other parts recommended to check where found to be good. > >> r14109 was mentioned to be 750 ohms but I found a 150k in its place and > it > >> does check good. It doesn't appear to have been tampered with, so I > think > >> it is original. > >> It has been also suggested to change out the "Gemstar" module. This set > >> doesn't have it. > >> I also have disconnected the collector of the HOT to see if sound is > >> returned. No help there. The power supply to the HOT is still zero. > >> At plug-in, I get a faint chirp that diminishes in volume for about two > >> seconds. > >> I have checked with a fine tooth comb, so to speak, for the possibility > of > >a > >> fine crack in the board as well as for poor connections.....None found. > >> At the bottom of this post is the original post on this set. > >> Perhaps someone has some additional ideas to try or possibly a scan of > the > >> power supply would be a help. > >> Again, thanks, > >> Daryl > >> PS > >> The customer's patience is wearing a bit thin as I have had this set for > >> awhile (awaiting parts, etc.) > >> > >> Daryl's TV > >> 3310 Dyer St. > >> El Paso, TX 79930 > >> 915-565-9184 > >> 915-564-1024 Fax > >> http://dynacomp.freeyellow.com > >> > >> -----Original Message----- > >> From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx> > >> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx> > >> Date: Thursday, September 26, 2002 3:08 PM > >> Subject: [TechAssist] Re: CTC203, DEAD- No start up > >> > >> > >> > > >> >Don't cheat on the parts. If transistor q14101 OR q14102 OR q14103 OR > >> >q14108 are bad replace all of them together > >> > > >> >r14107 244214 43ohms > >> >r14109 179317 1/4w 750ohms 5% > >> >r14108 244215 .1ohm 3W > >> >q14101 244223 > >> >q14102 147665 > >> >q14103 232218 > >> >q14106 215495 smd, maybe bad > >> >q14107 215495 smd, maybe bad > >> >q14108 215496 > >> >u14101 223653 > >> >u14102 231525 > >> > > >> >The failure was probably caused by u14102. This is a precision > reference > >> >IC. Although the opto-isolator is probably good for the buck it costs > it > >> >isn't worth the gamble. Also, very carefully check all of the pins on > >the > >> >switchmode transformer, ensuring that the traces are good. > >> > > >> >This power supply needs about 80vac to run. It is a frequency > modulated > >> >regulator. > >> > > >> >Wayne Vanaman > >> >Omega Electronics > >> >6904 W Fairfield Dr > >> >Pensacola, Fl. 32506-3310 > >> > > >> >850-456-5995 voice > >> >850-458-6369 fax > >> > > >> >Mailto:Wayne@xxxxxxxxxxxxxxxxxxxxx > >> >WWW.PensacolaTVRepair.Com > >> > > >> > > >> >----- Original Message ----- > >> >From: "D Thunhurst" <dthunhurst@xxxxxxx> > >> >To: "techassist" <techassist@xxxxxxxxxxxxx> > >> >Sent: Thursday, September 26, 2002 2:50 PM > >> >Subject: [TechAssist] CTC203, DEAD- No start up > >> > > >> > > >> >> > >> >> Hi, > >> >> I have a 36" RCA, F36665, chassis CTC203CE1 marked on the board and > >> >CTC203CX > >> >> marked on the back. > >> >> I am quite sure it is a start up problem as there are no secondary > >> >voltages > >> >> at all. I do have 165 volts raw B+ to the drain of Q14101. I > >originally > >> >> could start the set by placing my meter on the gate of Q14101 and I > >would > >> >> get a small chirp of the power supply starting up. I then could turn > >the > >> >> set on and everything worked until turned off. I checked everything > in > >> >the > >> >> gate circuit of Q14101 and found R14103 (1 meg) wide open. I > replaced > >> the > >> >> resistor and now I can not get it to turn on at all. At plug in, I > get > >a > >> >> faint diminishing chirp out of the power supply with 2.6 volts on the > >> >gate, > >> >> 165 on the drain, and 0 on the source. Naturally I am not getting my > >140 > >> >> volts or 5 volts, etc. I re-checked the components in the chopper > >> circuit > >> >> and found nothing else bad. > >> >> Any ideas? > >> >> Thanks, > >> >> Daryl > >> >> Daryl's TV > >> >> 3310 Dyer St. > >> >> El Paso, TX 79930 > >> >> 915-565-9184 > >> >> 915-564-1024 Fax > >> >> http://dynacomp.freeyellow.com > > > ------------------------------------------ > To REMOVE your email address, click here: > http://www.tech-assist.org/unsubb.html > To CHANGE your email address, click here: > http://www.techassist.net/forms/change.html > ------------------------------------------ > ***NEW*** Tips Added Instantly!!!*** > Submit Repair Tips here: > http://www.tech-assist.org/secure/tip/ ------------------------------------------ To REMOVE your email address, click here: http://www.tech-assist.org/unsubb.html To CHANGE your email address, click here: http://www.techassist.net/forms/change.html ------------------------------------------ ***NEW*** Tips Added Instantly!!!*** Submit Repair Tips here: http://www.tech-assist.org/secure/tip/