Sorry ; do check the regulator ! If the flyback should ever have such a short - it would be the first I would have ever seen in over 40 years. Usually if the winding would get such a high voltage - all the others would do so. There was a IHVT I replaced in a NEC and when fired up had arcing about 7-10 inches long coming out of it ! Vendor sent me a defective IHVT and the next one he sent me worked OK. Sorry for letting my "Experience get the best of me !" Maybe it is because I am working on a set that a hacknician had messed up royally. Just about to finish it up while I watch the football game. As for diodes checking OK , got to remember the meter only puts about 2 volts on the diode and I have run into many diodes that shorts when more than 3-4 volts are put on it. You problem has gotta be that 12 volt regulator unless there is something somewhere else is feeding the 25 volts to it. I fancy my first step would be remove to reg and see if the voltage goes down to near zero which it should and if it does not - some more effort needed. BTW , does that voltage also come from a STRSxxxx standby ? Check the small filters on the "hot" side of the STRSxxxx. Famous for partially opening up and the voltages goes sky high. Best: Eugene
matt sherer wrote: > > The grounds are not broken. Between the flyback and regulator are 2 diodes > and 2 resistors, all checked ok. My reasoning was if there is a short in > the windings of the flyback that maybe the voltage going to the regulator is > higher than normal. I was asking for help, not to be treated like an idiot. > > Gear Guy > Electronic repair > A/V systems design, maintenance and installation > AMX programming > Matt Sherer, CET > 1411 Honeysuckle Lane > Champaign, IL 61821 > (217)356-9479 > [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Eugene Spooner" <[EMAIL PROTECTED]> > To: "ELECTRONICS PROFESSIONALS LIST" <[EMAIL PROTECTED]> > Sent: Sunday, January 11, 2004 2:28 PM > Subject: Re: [Techs] Toshiba TV, CF3060k, bright screen with retrace lines > > > Please ! The flyback WILL supply more than 12 volts and the > > regulator's job is to bring it down to 12 volts ! Just be > > sure the grounds on the regulator is not broken or open ! > > Best: Eugene > > > > matt sherer wrote: > > > > > > Toshiba > > > Cf3060k > > > Problem: > > > Unit has bright picture with retrace lines. 193v on CRT board > present. > > > 12vdc supply to CRT bias transistors is 25Vdc. Traced back to 12 > regulator > > > off the flyback and voltage is 25vdc as well. Checked all associated > > > components and are ok. The 12v regulator gets it's feed from the > flyback so > > > I'm guessing the flyback. Just wanted to check if anyone has ran into > this > > > before or any tips. Thanks! > > > > > > Gear Guy > > > Electronic repair > > > A/V systems design, maintenance and installation > > > AMX programming > > > Matt Sherer, CET > > > 1411 Honeysuckle Lane > > > Champaign, IL 61821 > > > (217)356-9479 > > > [EMAIL PROTECTED] > > > > > > _________________________________________ > > > Please include original text when replying to this email. > > > Once you get your unit repaired, please post the fix to the group. > > > Order your tech repair CD today, Version 3.0 only $49.00-more monitor > > > tips-user friendly program. > > > [EMAIL PROTECTED] www.tech-repair.net > > > ______ > > > Techs mailing list > > > [EMAIL PROTECTED] > > > http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com > > > Go to the link above and scroll to the bottom to enter your email > address > > > > -- > > Head Witch Doctor and Chief Bottle Washer > > Eugene Spooner , CET , AAS , NP > > Eugene's Carry-In TV > > 1417 Eastway Drive > > Charlotte , NC 28205 > > mailto:[EMAIL PROTECTED] > > > > _________________________________________ > > Please include original text when replying to this email. > > Once you get your unit repaired, please post the fix to the group. > > Order your tech repair CD today, Version 3.0 only $49.00-more monitor > > tips-user friendly program. > > [EMAIL PROTECTED] www.tech-repair.net > > ______ > > Techs mailing list > > [EMAIL PROTECTED] > > http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com > > Go to the link above and scroll to the bottom to enter your email address > > > > _________________________________________ > Please include original text when replying to this email. > Once you get your unit repaired, please post the fix to the group. > Order your tech repair CD today, Version 3.0 only $49.00-more monitor > tips-user friendly program. > [EMAIL PROTECTED] www.tech-repair.net > ______ > Techs mailing list > [EMAIL PROTECTED] > http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com > Go to the link above and scroll to the bottom to enter your email address -- Head Witch Doctor and Chief Bottle Washer Eugene Spooner , CET , AAS , NP Eugene's Carry-In TV 1417 Eastway Drive Charlotte , NC 28205 mailto:[EMAIL PROTECTED] _________________________________________ Please include original text when replying to this email. Once you get your unit repaired, please post the fix to the group. Order your tech repair CD today, Version 3.0 only $49.00-more monitor tips-user friendly program. [EMAIL PROTECTED] www.tech-repair.net ______ Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com Go to the link above and scroll to the bottom to enter your email address
