[TechAssist] Re: Sony HK short

Make sure you cur the traces to the heater pins before you do this mod!

I tend to unsolder the entire socket & bend the heater pin up and away from
the PC board to be safe.

==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
==========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd


----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, March 30, 2003 4:28 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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