[TechAssist] Re: Sony HK short

Sometimes we can find them at electronic surplus source. I have some prewire
of this type transformer those used in car amplifier. I did not test it yet.
Dang
TD electronics
----- Original Message -----
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, March 30, 2003 9:34 PM
Subject: [TechAssist] Re: Sony HK short


>
> I just did one with the torroid core donut last week. Worked fine. The
> best thing about it rather than using turns of wire around the flyback
> core, is that you don't have to guess at how many turns to make the
> proper filament voltage. Just wrap 5 turns around one side of the donut,
> then 5 turns at the opposite side and you have a 1:1 ratio transformer.
> Slice the traces to the heater pins on the CRT board and connect the
> primary winding to the circuit traces and connect the secondary winding
> to the heater pins. Done.
>
> Only problem is I don't know where to get any more torroid donuts with
> the proper characteristics for this purpose.
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: gary (at) number63.ca
>
>
>
>
>
>
> tomlee wrote:
> >
> > I remember somebody said about the  small  ferite donut can do the
> > job.Primary on one half .Secondary on the other half .
> >  I think it is a good idea. I never try but I will do it when The fly
back
> > does not have place to wind the
> > wire.
> > Dang
> > TD electronics
> > ----- Original Message -----
> > From: "Kevin" <kevintv@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, March 30, 2003 1:28 PM
> > Subject: [TechAssist] Re: Sony HK short
> >
> > >
> > > Isolate the heater from ground.  There are a couple of ways to do
this.
> > > The easiest way is to take an 18-22 gauge insulated wire and wrap the
> > > middle of the wire 2 or 3 turns around the ferrite core of the flyback
> > > and then solder one end to H1 and the other end to H2.  You should
> > > measure the heater voltage before disconnecting the heater circuit
from
> > > H1 and H2.  You may have to play with the gauge of wire and number of
> > > turns to get it close to the original heater voltage.  Unless
something
> > > else happens to the pix tube, this should be a permanent fix.
> > >
> > > The second way involves using a 120 volt to 6 volt transformer.  But
> > > this way is more difficult because you have to have the type of
circuit
> > > that has a relay that is activated by the micro and then the relay
turns
> > > the set on.  Also the transformer costs more money than a piece of
wire.
> > > The wire method also is easier to figure out (at least for me!)
> > >
> > > 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 mark brock
> > > Sent: Sunday, March 30, 2003 12:18 PM
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Sony HK short
> > >
> > >
> > > I have a 35" Sony in with bright blue and retrace then shutdown,  I
find
> > > 46
> > > ohms from KB ( pin 10 ) to either  H1 or H2,  tried the hk short
removal
> > > using hivoltage to G1 and G2 but no help,  since the short doesn't
> > > involve
> > > G1 and 2 should  I be arcing the H's or KB pins instead ?  may have to
> > > try
> > > the isolation procedure  if so,  is this put on the H1 and H2 either
or
> > > both
> > > or do I Isolate KB from the board ?   now are you as confused as I am,
> > > I've
> > > had good luck in past by using the G2 procedure,  anyway,  customer
> > > won't do
> > > the new tube thing but willing to spend a little on a short term fix ?
> > > sure
> > > appreciate any clarification on this method.  thanks for all your help
> > > brock
> > > Brock Electronics
> > > R.R.4 box 237
> > > 5208  cr.3385
> > > Independence Ks. 67301
> > > 620-331-0235
> > > fax  331-7191
> > >
> > > brock@xxxxxxx
> > > mailto:brock@xxxxxxx
> > > Zenith*Philips*Peavey*Fender*Crate
> > > we work on all brands,makes,models
> > > of anything that plugs in the wall
> > >
> > >
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