Replace the three electrolytics the 2.2uf, 15uf and 39uf this will bring your regulation in line...by the regulation Ic and chopper...
Mo Dale Mailto:[EMAIL PROTECTED] Fey's Electronics 2027 S. Main St. Suite 2 Bloomington, Il 61704 FON 309-829-7151 FAX 309-829-0619 Http://www.feys.biz The son of man did not come to serve, but to be served... -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Tiedeman Sent: Friday, March 05, 2004 12:35 PM To: ELECTRONICS PROFESSIONALS LIST Subject: Re: [Techs] TA RCA PTK169(CTC169PAAS) I was a little confused when you say , in standby the voltage is 147, then 143 in run. It looks like it is 174v in standby then 157 in run which is to high. Is this accurate? If it is., then it is probably still a regulation problem. The arcing at the tippler probably damaged the regulator which you replaced. Should be around 143 Volts if I recall. Unsolder the collector of the H.O.T and try and get regulator circuit working properly. Might have to put in another regulator .I.C. Bruce. ----- Original Message ----- From: "Intrepid Video Support" <[EMAIL PROTECTED]> To: "Tech List" <[EMAIL PROTECTED]> Sent: Friday, March 05, 2004 11:25 AM Subject: [Techs] TA RCA PTK169(CTC169PAAS) > Model P46770CKLG1 > CTC169PAAS CL4413. > This set looks like one of the first 169's..I'm embarrassed to post a question on this set being so > familiar..but I've checked all I can think of. > At customer's house, found HV arcing at splitter. I assumed bad splitter..so replaced. > Then, set would fire three times, remove anode lead and fires once and shuts down. > Replaced flyback, same thing. Replaced HOT, regulated supply (U4101, Q4101, all caps(4) checked all > resistors and replace 3v zener(measures -1.5 on anode and 1.5 on cathode in run) > HV comes up to about 35k. HOT coll is 147 in standby, drops to 143 in run. > B+ at fly about the same. Q4101 C=174 in stand by, 157 in run. > Disconnecting the HV board(on the HOT heat sink) makes no difference. > With the anode connected to the HV block, some times the set tried to start three or four times, other > times only once.(Disconnected, only once) > First guess was another bad fly, but both actually ring good on my Sencore VA48. > I started back tracking in case I got bad parts for regulated circuit, but I get the same symptoms. All > parts are OEM except U4101(which I now have the original part in unit). > I have the Fix finder for this chassis and went down through every thing. > Has anyone seen these symptoms? > Thank you > > Jeff Dougherty > Intrepid Video TV/VCR > 263 S Front St > Steelton PA 17113 > fax...717-564-4952 > www.intrepid-video.com www.tech-repair.net > > > _______________________________________________ > Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. > www.intrepid-video.com www.tech-repair.net > Techs mailing list > [EMAIL PROTECTED] > http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
