Hi Mike: Check Q1402,Q1403,R14105,R14107,R14125 and R14111 also check for bad solder connection on sw.mode transformer pin#1 that goes to R14105. Good luck. Jorge. ----- Original Message ----- From: Mike Barnett <passthecash@xxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Tuesday, November 20, 2001 11:18 PM Subject: [TechAssist] Re: RCA 32GT720 chassis CTC203CF3 no power blows Q14401 > > Today i changed the fly with a brand new one, changed the reg and put a new > hot in too, checked both the primary ps and hot curcuit carefuly. could not > find anything bad. So i put power too it and emediatly when plugged in main > fuse blows also causing q14101 to short also. any ore sugestions on the set > would be great. > > Thanks, > Mike > > On Fri, 16 Nov 2001 19:08:05 -0500, techassist@xxxxxxxxxxxxx wrote: > > > Is the q that keeps blowing the hot or the b+ regulator? I don't have that > print. What you must do is cut the circuit in half......is it the h.o. > circuit or the power supply. Get the horizontal out of the picture by > disconnecting the fly and put a load ( l.bulb)on the 135 volt rail. You > obviously don't have a dc short on the transistor (you don't do you?) > which > leads me to believe it's the fly. Get it out of there and see. I have the > Sencore HA2500 Horizontal Analyzer which makes quick work of this kind of > stuff. > > > > > ----- Original Message ----- > From: "Mike Barnett" <passthecash@xxxxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Friday, November 16, 2001 10:53 AM > Subject: [TechAssist] Re: RCA 32GT720 chassis CTC203CF3 no power blows > Q14401 > > > > > > Thanks for the suggustion, i've heard of this test however i have never > > tried it. Can you explain the result of this test in a good and bad > sinario. > > The problem is that in order to keep testing other things on this board > i > > have to keep replacing q14401 and the fuse. as soon as i plug the set in > the > > main and q14401 blows. with a new q14401 and fuse in place, and > implementing > > your suggestion, if the fly is bad i'm thinking than q14401 should be > stable > > and the fuse sould not blow. However if it is not bad(fly) q14401 should > > blow and the bulb should light? Please correct me if i'm wrong. > > > > TIA, > > Mike > > > > > > On Thu, 15 Nov 2001 09:22:48 -0500, techassist@xxxxxxxxxxxxx wrote: > > > > > > sounds like the fly. desolder hot and fly primary and put a light bulb > in > > place of fly primary b+ input to ground. > > > > > > ----- Original Message ----- > > From: "Mike Barnett" <passthecash@xxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Thursday, November 15, 2001 9:14 AM > > Subject: [TechAssist] RCA 32GT720 chassis CTC203CF3 no power blows > Q14401 > > > > > > > > > > Hi guys, RCA chassis # CTC203CF3 Set blows main fuse and Q14401. I > > changed > > > Q14401 and the two small transistors in curcuit(Q14402/pt#147665 and > > Q14403 > > > pt#232218) I checked the horizonal curcuit but found nothing to be > bad. > > > Changed HOT anyway and checked all diodes in both curcuits. None are > > bad. > > > Cant seem to find anything shorted on the board. After carefull > > inspection > > i > > > did notice that the insulator of q14401 is very thin and seemed that > in > > > removal of the original device i may have comprimised the insulator. > i > > put > > a > > > new one on and changed q14401 again and checked it carefuly. plugged > the > > set > > > in blows again both q14401 and the main fuse. Does anyone have any > info > > on > > > this chassis? Please help. > > > > > > TIA > > > > > > Mike > > > > > > > > > > > > > > > > > > > > > Get It Fixed At > > > Rochester Electronics > > > 630 West Ridge Rd. > > > Rochester, NY 14615 > > > 716.663.6870 > > > www.RochesterElectronicsRepair.com > > > > > > > > > > > > > > > > > > > > > > > > ____________________________________________________________________________ > > __ > > > Send a friend your Buddy Card and stay in contact always with Excite > > Messenger > > > http://messenger.excite.com > > > > > > > > > ***************************************** > > > Help make your TechAssist online repair tips > > > database better! Submit your fixes here: > > > http://www.circuitwork.com/techassist/tip/#tips > > > ***************************************** > > > To UNSUBSCRIBE write to: > > > techassist-request@xxxxxxxxxxxxx > > > with unsubscribe in the subject line. > > > > ***************************************** > > Help make your TechAssist online repair tips > > database better! Submit your fixes here: > > http://www.circuitwork.com/techassist/tip/#tips > > ***************************************** > > To UNSUBSCRIBE write to: > > techassist-request@xxxxxxxxxxxxx > > with unsubscribe in the subject line. > > > > > > > > > > > > _______________________________________________________ > > http://inbox.excite.com > > > > > > ***************************************** > > Help make your TechAssist online repair tips > > database better! Submit your fixes here: > > http://www.circuitwork.com/techassist/tip/#tips > > ***************************************** > > To UNSUBSCRIBE write to: > > techassist-request@xxxxxxxxxxxxx > > with unsubscribe in the subject line. > > ***************************************** > Help make your TechAssist online repair tips > database better! Submit your fixes here: > http://www.circuitwork.com/techassist/tip/#tips > ***************************************** > To UNSUBSCRIBE write to: > techassist-request@xxxxxxxxxxxxx > with unsubscribe in the subject line. > > > > > > _______________________________________________________ > http://inbox.excite.com > > > ================================= > Help make your TechAssist database better! > Submit your fixes here: http://circuitwork.com/techassist/tip/#tips > ================================= > To UNSUBSCRIBE your email address, click here: > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > ================================= Help make your TechAssist database better! Submit your fixes here: http://circuitwork.com/techassist/tip/#tips ================================= To UNSUBSCRIBE your email address, click here: mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe