Robert, The complete information was included in the original post but here is the information. 36" RCA, F36665, chassis CTC203CE1 marked on the board and CTC203CX marked on the back. I do not have any stanby voltages whatsoever. I do not have the 150v, 5v, 12v nor -11v....Nothing. I have raw B+ of 165 volts at drain of q14101, 2.6 volts at the gate of q14101 and 0 volts at source of q14101. Does this give any clues? 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: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx> Reply-To: techassist@xxxxxxxxxxxxx Date: Fri, 18 Oct 2002 18:09:05 -0500 > >Daryl, >What is the complete model numbers >do you have standby voltages at secondary of smps CR14106 +150v,CR14108 >+16v,CR14109 -11v >If so check for switched +12volt at U14104 pin 3 ,+16v pin 1 >switched by Q14105,Q14104 from micro U13101 pin 19 >If no change of state at pin 19 go to pin 5 of micro for +2.5v if low check >for leaky surface mount cap C13108 or C13167 >good luck will be back monday if I can be more help >Robert >tvservice@xxxxxxxxxxxxxxxxxxx >H & H Electronics Inc > > >----- 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/ > ------------------------------------------ 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/