As Al said, I think you need to do some study on the theory of operation. It will help tremendously in you troubleshooting efforts. I have a saying that I use here; "You can't efficiently fix something unless you know how it works". Serendipity goes just so far... Jim McVey McVey Alltronix 327 Broadway Newburgh Ny 12550 ph: 845 561 8383 fx: 845 561 9017 Consumer electronics & computer service. Factory authorized for over twenty brands. ----- Original Message ----- From: "Kevin" <kevintv@xxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Thursday, May 20, 2004 10:58 PM Subject: [TechAssist] Re: FIXED Magnavox XS2552 C102, chassis 25P613-00AA, blows HOT immediately, need to know value of B+ > So the timing cap keeps the flyback primary pulse within the specs of > the HOT? I have also had a bad connection on the timing cap and all > that happened was the picture was affected. Does whether the HOT is > shorted or not depend on the design of the circuit? > > 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 becyn > Sent: Thursday, May 20, 2004 3:34 PM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Re: FIXED Magnavox XS2552 C102, chassis > 25P613-00AA, blows HOT immediately, need to know value of B+ > > It will send the flyback primary pulse over the C-E 0r C-B ratings of > the > H-out.(not to mention the timing skew) > > Jim McVey > McVey Alltronix > 327 Broadway > Newburgh Ny 12550 > ph: 845 561 8383 > fx: 845 561 9017 > Consumer electronics & > computer service. > Factory authorized for > over twenty brands. > ----- Original Message ----- > From: "Kevin" <kevintv@xxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Thursday, May 20, 2004 5:47 PM > Subject: [TechAssist] Re: FIXED Magnavox XS2552 C102, chassis > 25P613-00AA, > blows HOT immediately, need to know value of B+ > > > > Timing capacitor, C505 9.1 nF @ 1600 volts, was open (measured 20 pF). > > I used C5149 for the HOT. Thanks for all the replies. > > > > Why would this bad timing cap cause the HOT to short immediately after > > turning the set off? Thanks. > > > > 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 > gulftech@xxxxxxxx > > Sent: Thursday, May 20, 2004 6:23 AM > > To: techassist@xxxxxxxxxxxxx > > Subject: [TechAssist] Re: Magnavox XS2552 C102, chassis 25P613-00AA, > > blows HOT immediately, need to know value of B+ > > > > Kevin, > > > > First, I don't like NTE or SK replacements, especially for HOT's. > Next, > > it is always best to start with the original. If you don't have the > > original, cross it to a generic with equal or better specs. If you > > cross > > it to an NTE and then try to use a generic that also crosses to the > same > > NTE is not reliable. The D1849 is a 7A, 120 wt, w/ damper. The NTE, > is > > lower gain and lower power rating (70 wt). If you must use an NTE, > try > > an NTE2318. > > > > Still, I am concerned about the HOT shorting immediately. Check for > > open > > safely caps in the horizontal deflection. Often, you can see them > > cracked and a little carbon burn on them. This would cause you high > > voltage to run way high and take out the HOT. > > > > HTH, > > > > > > Ken Smith > > Gulf Technical Services > > 3034 Gulf Breeze Parkway > > Gulf Breeze, FL 32563 > > 850-934-8324 (Voice) 850-932-0819 (Fax) > > > > > > On Wed, 19 May 2004 16:20:01 -0700 Kevin <kevintv@xxxxxxx> writes: > > > I used a D1849 which crosses to an NTE 2353. I don't have the exact > > > Phillips replacement. I have done this before many times before > > > with no > > > call backs. Even if the D1849 wasn't exactly the same as the > > > Phillips > > > part, it should be good enough for test purposes. It should not > > > fail in > > > 1 second. What, in your estimation, is the best generic sub for NTE > > > 2353? > > > > > > 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 > > > gulftech@xxxxxxxx > > > Sent: Wednesday, May 19, 2004 3:05 PM > > > To: techassist@xxxxxxxxxxxxx > > > Subject: [TechAssist] Re: Magnavox XS2552 C102, chassis 25P613-00AA, > > > blows HOT immediately, need to know value of B+ > > > > > > Kevin, > > > > > > Quit using those darn NTE outputs and buy a good stock of real > > > transistors. You end up beating yourself to death because of a bad > > > sub > > > and think it's something else. Costs you time, money, and patience. > > > > > > > > > Ken Smith > > > Gulf Technical Services > > > 3034 Gulf Breeze Parkway > > > Gulf Breeze, FL 32563 > > > 850-934-8324 (Voice) 850-932-0819 (Fax) > > > > > > > > > On Wed, 19 May 2004 12:49:10 -0700 Kevin <kevintv@xxxxxxx> writes: > > > > I measured the B+ before I installed the HOT by putting a 110 ohm, > > > 30 > > > > watt resistor from collector to ground. The B+ measured 127 > > > volts, > > > > and > > > > the STR30130 was ouputting 130.2 volts. Thinking everything was > > > > good, I > > > > installed the new HOT (Q502 NTE 2353) and turned the set on. The > > > HV > > > > came up but 'sounded funny', so I quickly turned the TV off and > > > > discovered a totally black fuse and shorted HOT. My flyback rings > > > > good. > > > > Could it still be a bad flyback? > > > > > > > > Kevin Wilks > > > > Kevin's TV & Video Repair > > > > Penticton BC Canada > > > > kevintv@xxxxxxx > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------ > -- > --- > > Lost Password: > > http://www.tech-assist.org and select "Login Problems?". > > Email Archives: > > //www.freelists.org/archives/techassist/ > > > > ------------------------------------------------------------------------ > ----- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". 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