I saw this on here. If you get a blacklight and look at the bottom of the board cracks and cold solder joints show up a different color than the good solder. Might be an article on NASDA web sight. I tied it with cracked boards and the crack stands out. Also the bad solder stands out. Al Marquardt [EMAIL PROTECTED] Al Marquardt Electronic Repair 206 W Main Girardville Pa. 17935 ----- Original Message ----- From: "Ed Gaidies" <[EMAIL PROTECTED]> To: "'ELECTRONICS PROFESSIONALS LIST'" <[EMAIL PROTECTED]> Sent: Wednesday, January 21, 2004 11:16 AM Subject: RE: [Techs] Toshiba 27A41 Intermittent Picture Distortion
> OK Al; > Expand on this "Black light" tool. Something worth sharing? > > -Ed- > > Ed Gaidies > Tel-Tek Electronics. > Ontario-Canada > > [EMAIL PROTECTED] > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of al m > Sent: January 21, 2004 9:43 AM > To: ELECTRONICS PROFESSIONALS LIST > Subject: Re: [Techs] Toshiba 27A41 Intermittent Picture Distortion > > Bob, I just had a Sony that I think was doing the same thing as you're > describing. I thought it was the tuner acting up but it turned out to be > a > timing cap in the HOT circuit was arcing. Just a idea. If you have a > black > light look at the bottom of the board for cold solder. I tried it and it > actually works. > Al Marquardt > [EMAIL PROTECTED] > Al Marquardt Electronic Repair > 206 W Main > Girardville Pa. 17935 > ----- Original Message ----- > From: "Gemini Computer & TV" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, January 21, 2004 8:24 AM > Subject: [Techs] Toshiba 27A41 Intermittent Picture Distortion > > > > I currently have a Toshiba model 27A41 that has a very intermittent > video > > distortion that is rather hard to describe and unfortunately my > digital > > camera is at a different location. I will attempt to get it so I can > > hopefully get a good picture of it and post it to my website later > because > > we all know a picture paints a thousand words in a case like this. I > have > > ONLY noticed this symptom on the RF input but have not yet determined > if > it > > occurs using any of the video inputs (composite, component, or > S-Video). I > > am now running a DVD using composite video to see if it does occur > there. > > The best way I can describe the symptom is that first I do not notice > any > > audio problem at all, only the video (or raster) is affected. The > picture > > will get these vertical distortion lines like it is breaking up (no > loss > of > > sync though) and at that time when this occurs, there are bands of > purity > > distortion that accompany the distortion. It can occur from a dead > cold > > start within a minute or the set can run for hours and then act up. I > have > > been all over the board with jewlers goggles and a jewelers loupe and > can > > find no cracks or bad solder. I cannot induce the symptom by tapping > the > > board nor by freezing or heating it. The symptom is completely random. > So > > far I have replaced the following components yet the symptom remains: > > > > Tuner (TU001) > > IC201 > > IC701 > > IC1501 > > > > So if someone has some suggestions, I am all ears. > > > > Bob Waterman, CETR #RI-28 > > Master Technician License #9109 > > Service Manager / Parts Manager > > Gemini Computer, TV, & Security Alarms > > (508)695-7302 > > (508)695-7769 FAX > > [EMAIL PROTECTED] > > [EMAIL PROTECTED] > > www.geminicomputertvsecurityalarms.com > > > > > > _________________________________________ > > 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 > > > _________________________________________ > 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
