Buy a good ESR Meter and find the bad cap or caps in the Vertical Deflector . docwade2@xxxxxxxx ----- Original Message ----- From: "VRM" <vrmsys@xxxxxxxxxxxx> To: "Tech Assist" <techassist@xxxxxxxxxxxxx> Sent: Wednesday, October 31, 2001 6:07 AM Subject: [TechAssist] Re: HELP NEEDED SONY TV MODEL KV-F29MF1 > > Hello; > Thanks for all the responses so far. I tried all the advice you gave and > performed all the checks, but the VERTICAL deflection problem is still the > same. > > The VERTICAL is not FULLY deflecting. It is centered around 80-90% of the > screen. > > The heat dissipation by most critical MAJOR components such as the > HORIZONTAL etc, are very normal, BUT that of the VERTCAL gets warmed up so > quickly. > > I have a strong feeling of a possible SHORT CIRCUITING or LACK of REGULATION > of the VERTICAL DEFLECTOR. Can ANYONE suggest the next step I should take? I > will appreciate all guidelines given. > > THANKS to ALL. > > Viktor > > > > ----- Original Message ----- > > From: "Tel-Tek Electronics" <teltek@xxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Monday, October 22, 2001 9:07 PM > > Subject: [TechAssist] Re: HELP NEEDED SONY TV MODEL KV-F29MF1 > > > > > > > > > > If you have a picture, with lack of vertical scan, I would presume the > > > voltages you are trying to measure are there. (nomally). Probably just > > using > > > wrong reference to ground. > > > I would try troubleshooting the vertical now, but keep a close eye on > that > > > H/O transistor, for heat dissapation, in case your lack of vertical is > > > actually poor regulation. > > > > > > -Ed- > > > > > > teltek@xxxxxxxxxxx > > > TEL-TEK ELECTRONICS. > > > > > > > > > > > > > > > > > > ----- Original Message ----- > > > From: "VRM" <vrmsys@xxxxxxxxxxxx> > > > To: "Tech Assist" <techassist@xxxxxxxxxxxxx> > > > Sent: Wednesday, September 05, 2001 10:42 PM > > > Subject: [TechAssist] HELP NEEDED SONY TV MODEL KV-F29MF1 > > > > > > > > > > Hello, > > > > > > > > This SET came in without POWER. After my preliminary checks I found > out > > > the HORIZONTAL transistor was faulty (SHORT circuiting). I changed it > and > > > the SET came on, BUT the screen vertical deflection is not FULL, i.e. > > > filling only HALF the screen in the MIDDLE. > > > > > > > > B+ (135V) is present, but some voltages indicated on the FLYBACK > > TERMINALS > > > such as 200V, +15V, -15V e.t.c are all not present. > > > > > > > > I DONT HAVE THE SCHEMATICS TO THIS SET. CAN ANYONE HELP BY EMAILING A > > > SCANNED COPY TO ME. > > > > > > > > MY QUESTION to the BOARD is " WHAT CAN CAUSE A HORIZONTAL DEFLECTION > > > TRANSISTOR TO GET SHORTED"? could it be a from the FBT or ??????? > > > > > > > > 1. I need ALL possible advice/suggetions from every quarters as to how > > to > > > go about this. > > > > > > > > 2. I suspect one of these to be faulty, i.e. the FLYBACK TRANSFORMER > or > > > the VERTICAL DEFLECTION CHIP (STV 9379), but not very SURE of which. > > > > > > > > Thanks and awaiting responses from all. > > > > > > > > Viktor > > > > > > > > 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. > > > > 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. > 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.