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

From: Kevin <kevintv@xxxxxxx>
To: techassist@xxxxxxxxxxxxx
Date: Thu, 20 May 2004 19:52:33 -0700

I turned the set on and got HV with sound--"sounded" odd to me so I
quickly turned it off and found the HOT shorted and the fuse black.    

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 3:03 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: FIXED Magnavox XS2552 C102, chassis
25P613-00AA, blows HOT immediately, need to know value of B+

Kevin,

As I tried to tell you in my previous post.  That cap determines the
high
voltage output by the flyback.  It goes too high and shorts the HOT. 
BTW, I think you meant "cause the HOT to short immediately after turning
the set  ON.


Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL  32563
850-934-8324 (Voice) 850-932-0819 (Fax)


On Thu, 20 May 2004 14:47:15 -0700 Kevin <kevintv@xxxxxxx> writes:
> 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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References:
- [TechAssist] Re: FIXED Magnavox XS2552 C102, chassis 25P613-00AA, blows HOT immediately, need to know value of B+
  - From: gulftech

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

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