[TechAssist] Re: FIXED Magnavox XS2552 C102, chassis 25P613-00AA, blows HOT immediately, need to know value of B+

  • From: "J Silverman" <greentron@xxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 21 May 2004 13:10:28 -0400

I thought that was why people buy tips programs. At least that is what the
people that sell the tips programs tell me.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "becyn" <becyn@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, May 21, 2004 1:31 PM
Subject: [TechAssist] Re: FIXED Magnavox XS2552 C102, chassis 25P613-00AA,
blows HOT immediately, need to know value of B+


> 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
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > >
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