The isolation using the fbt core will work. If the crt pcb have resistor and capacitor not installed, you can use it to do the isolation on the heater. Good luck. Panday From: "al m" <ampm@xxxxxxx> Reply-To: techassist@xxxxxxxxxxxxx To: <techassist@xxxxxxxxxxxxx> Subject: [TechAssist] Re: Sony HK short Date: Mon, 31 Mar 2003 00:05:23 -0500 Jeff I've done this one time and it worked like a charm on a Zenith. Make sure you get everything off the filament pins. al marquardt ampm@xxxxxxx ----- Original Message ----- From: <support@xxxxxxxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Sunday, March 30, 2003 5:51 PM Subject: [TechAssist] Re: Sony HK short > > Kevin, > With this method, do you still isolate both heater pins? > I've always been a little cautious to do this. It just seems it would make a direct short to ground on the heater pins. Then, just > wrap it around the flyback a couple of turns? > > 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 > > ----- Original Message ----- > From: "Kevin" <kevintv@xxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Sunday, March 30, 2003 4:28 PM > Subject: [TechAssist] Re: Sony HK short > > > > Isolate the heater from ground. There are a couple of ways to do this. > The easiest way is to take an 18-22 gauge insulated wire and wrap the > middle of the wire 2 or 3 turns around the ferrite core of the flyback > and then solder one end to H1 and the other end to H2. You should > measure the heater voltage before disconnecting the heater circuit from > H1 and H2. You may have to play with the gauge of wire and number of > turns to get it close to the original heater voltage. Unless something > else happens to the pix tube, this should be a permanent fix. > > The second way involves using a 120 volt to 6 volt transformer. But > this way is more difficult because you have to have the type of circuit > that has a relay that is activated by the micro and then the relay turns > the set on. Also the transformer costs more money than a piece of wire. > The wire method also is easier to figure out (at least for me!) > > Kevin Wilks > Kevin's TV & Video Repair > Penticton BC Canada > kevintv@xxxxxxx > > -----Original Message----- > From: techassist-bounce@xxxxxxxxxxxxx > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of mark brock > Sent: Sunday, March 30, 2003 12:18 PM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Sony HK short > > > I have a 35" Sony in with bright blue and retrace then shutdown, I find > 46 > ohms from KB ( pin 10 ) to either H1 or H2, tried the hk short removal > using hivoltage to G1 and G2 but no help, since the short doesn't > involve > G1 and 2 should I be arcing the H's or KB pins instead ? may have to > try > the isolation procedure if so, is this put on the H1 and H2 either or > both > or do I Isolate KB from the board ? now are you as confused as I am, > I've > had good luck in past by using the G2 procedure, anyway, customer > won't do > the new tube thing but willing to spend a little on a short term fix ? > sure > appreciate any clarification on this method. thanks for all your help > brock > Brock Electronics > R.R.4 box 237 > 5208 cr.3385 > Independence Ks. 67301 > 620-331-0235 > fax 331-7191 > > brock@xxxxxxx > mailto:brock@xxxxxxx > Zenith*Philips*Peavey*Fender*Crate > we work on all brands,makes,models > of anything that plugs in the wall > > ************************************************************************ > ***** > Add a known good Tech line number or part supplier in The > Tech Address Book. > http://www.tech-assist.org/secure/tip/contact.html > ************************************************************************ > ***** > Submit A Repair Tip Here, or Change/Remove your Email Address: > http://www.tech-assist.org/secure/tip/main.html > ************************************************************************ > ***** > For automatic password retrieval 24 hours a day, go to: > http://www.tech-assist.org and select "Lost your Login Info?". > ************************************************************************ > ***** > Access the archives here: > http://www.freelists.org/archives/techassist/ > ************************************************************************ > ***** > > **************************************************************************** * > Add a known good Tech line number or part supplier in The > Tech Address Book. > http://www.tech-assist.org/secure/tip/contact.html > **************************************************************************** * > Submit A Repair Tip Here, or Change/Remove your Email Address: > http://www.tech-assist.org/secure/tip/main.html > **************************************************************************** * > For automatic password retrieval 24 hours a day, go to: > http://www.tech-assist.org and select "Lost your Login Info?". > **************************************************************************** * > Access the archives here: > http://www.freelists.org/archives/techassist/ > **************************************************************************** * > > > **************************************************************************** * > Add a known good Tech line number or part supplier in The > Tech Address Book. > http://www.tech-assist.org/secure/tip/contact.html > **************************************************************************** * > Submit A Repair Tip Here, or Change/Remove your Email Address: > http://www.tech-assist.org/secure/tip/main.html > **************************************************************************** * > For automatic password retrieval 24 hours a day, go to: > http://www.tech-assist.org and select "Lost your Login Info?". > **************************************************************************** * > Access the archives here: > http://www.freelists.org/archives/techassist/ > **************************************************************************** * > > ***************************************************************************** Add a known good Tech line number or part supplier in The Tech Address Book. http://www.tech-assist.org/secure/tip/contact.html ***************************************************************************** Submit A Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.html ***************************************************************************** For automatic password retrieval 24 hours a day, go to: http://www.tech-assist.org and select "Lost your Login Info?". ***************************************************************************** Access the archives here: http://www.freelists.org/archives/techassist/ ***************************************************************************** _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus ***************************************************************************** Add a known good Tech line number or part supplier in The Tech Address Book. http://www.tech-assist.org/secure/tip/contact.html ***************************************************************************** Submit A Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.html ***************************************************************************** For automatic password retrieval 24 hours a day, go to: http://www.tech-assist.org and select "Lost your Login Info?". ***************************************************************************** Access the archives here: http://www.freelists.org/archives/techassist/ *****************************************************************************