[TechAssist] Re: Sony HK short
- From: "D Panday" <dpanday@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 31 Mar 2003 18:09:55 -0500
Yes! for sure.
Panday
From: "al m" <ampm@xxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] Re: Sony HK short
Date: Mon, 31 Mar 2003 13:26:45 -0500
Yes but you have to disconnect the original wires and the cap and resistor
if it's on the CRT board.
al marquardt
ampm@xxxxxxx
----- Original Message -----
From: "mark brock" <brock@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, March 31, 2003 10:23 AM
Subject: [TechAssist] Re: Sony HK short
>
> Jeff: and all
> forgive my ignorance here but never had this much problems in past,
> usually a focus short, anyway, with the neck board removed I can
measure
> 130 ohms from KR to either of the H terminals ( on the tube itself ),
same
> with KG, so the green and red K's have 130 or so ohms between them and
the
> heaters. the blue ( KB) has 40 ohms, it appears to be the problem, I
> tried to isolate using a donut with 5-6 wraps of red wire to H1 then 5-6
of
> white wire to H2, no help, I'm not sure about the wraps around the
fbt
> core, thats going to be a short ? i.e.. shorting H1 to H2 by way of
wire
> wrapped around the fbt core ? is this right, ( I did it, and it
flashed
> in the neck, shut down immediately ) undid all the mess, hooked back up
> like normal still have low resistance on KG pin, what if I do the
> highvoltage spark from the anode lead to KG? its the one with the crud
> arcing to some other pin inside ? note: when its cold the ohms are all
> the same on R,G,and B, but warms up and gets 40 ohms on blue,
> in summary, the problem is KB inside the tube, measured with neck
board
> off. doesn't the rejuvenator just blow high voltage to what ever pin is
> shorted in an attempt to blast the carbon build up or crud out of the way
?
> thanks again
> brock
>
> ----- Original Message -----
> From: "Shoreline Electronics" <jstielau@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, March 31, 2003 8:03 AM
> Subject: [TechAssist] Re: Sony HK short
>
>
> >
> > Did you try just using the wire wrapped around the flyback core method?
> >
> >
> > Also....don't overlook the possibility of a problem in the blue driver
> > circuit.
> >
> > ==========================
> > 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: "mark brock" <brock@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, March 31, 2003 8:38 AM
> > Subject: [TechAssist] Re: Sony HK short
> >
> >
> > >
> > > Thanks Gary,George,Kevin and Tommylee, for the info. I used one of
> those
> > > red and white donut coils off of the old rca's have several of them
and
> > > used in past but won't work on this set, I tried everything still
> either
> > > all blue bright with retrace and shutdown or no picture at all,
when
I
> > > isolated it in the past I looked for 21 volts peak to peak on the
wire
> > ends,
> > > then attached to heaters after they were cut from the rest of the
world,
> > > wonder if thats enough for this big Sony ? it just went to black
screen
> > > when I did that, thought I blew it all together but when re
connected
> was
> > > back to the blue screen, this one may be shot ? wish I still had
a
> > > rejuvenator, would be the second time I've needed it in about 5
years.
> > if
> > > I knew it would work this set would warrant its purchase, I'll try
> some
> > > more and let you know what I find.
> > > brock
> > >
> > > ----- Original Message -----
> > > From: "Gary McCartney" <gary@xxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Sunday, March 30, 2003 11:34 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
> > > > > >
> > > > > >
> > >
************************************************************************
> > > > > > *****
> > > > > > Add a known good Tech line number or part supplier in The
> > > > > > Tech Address Book.
> > > > > > http://www.tech-assist.org/secure/tip/contact.html
> > > > > >
> > >
************************************************************************
> > > > > > *****
> > > > > > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > > > > > http://www.tech-assist.org/secure/tip/main.html
> > > > > >
> > >
************************************************************************
> > > > > > *****
> > > > > > For automatic password retrieval 24 hours a day, go to:
> > > > > > http://www.tech-assist.org and select "Lost your Login Info?".
> > > > > >
> > >
************************************************************************
> > > > > > *****
> > > > > > Access the archives here:
> > > > > > http://www.freelists.org/archives/techassist/
> > > > > >
> > >
************************************************************************
> > > > > > *****
> > > > > >
> > > > > >
> > > > >
> > >
> >
>
****************************************************************************
> > > > > *
> > > > > > Add a known good Tech line number or part supplier in The
> > > > > > Tech Address Book.
> > > > > > http://www.tech-assist.org/secure/tip/contact.html
> > > > > >
> > > > >
> > >
> >
>
****************************************************************************
> > > > > *
> > > > > > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > > > > > http://www.tech-assist.org/secure/tip/main.html
> > > > > >
> > > > >
> > >
> >
>
****************************************************************************
> > > > > *
> > > > > > For automatic password retrieval 24 hours a day, go to:
> > > > > > http://www.tech-assist.org and select "Lost your Login Info?".
> > > > > >
> > > > >
> > >
> >
>
****************************************************************************
> > > > > *
> > > > > > Access the archives here:
> > > > > > http://www.freelists.org/archives/techassist/
> > > > > >
> > > > >
> > >
> >
>
****************************************************************************
> > > > > *
> > > > >
> > > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > > Add a known good Tech line number or part supplier in The
> > > > > Tech Address Book.
> > > > > http://www.tech-assist.org/secure/tip/contact.html
> > > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > > > > http://www.tech-assist.org/secure/tip/main.html
> > > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > > For automatic password retrieval 24 hours a day, go to:
> > > > > http://www.tech-assist.org and select "Lost your Login Info?".
> > > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > > Access the archives here:
> > > > > http://www.freelists.org/archives/techassist/
> > > > >
> > >
> >
>
****************************************************************************
> > > *
> > > >
> > > > --
> > > >
> > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > Add a known good Tech line number or part supplier in The
> > > > Tech Address Book.
> > > > http://www.tech-assist.org/secure/tip/contact.html
> > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > > > http://www.tech-assist.org/secure/tip/main.html
> > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > For automatic password retrieval 24 hours a day, go to:
> > > > http://www.tech-assist.org and select "Lost your Login Info?".
> > > >
> > >
> >
>
****************************************************************************
> > > *
> > > > Access the archives here:
> > > > http://www.freelists.org/archives/techassist/
> > > >
> > >
> >
>
****************************************************************************
> > > *
> > >
> > >
> >
>
****************************************************************************
> > *
> > > Add a known good Tech line number or part supplier in The
> > > Tech Address Book.
> > > http://www.tech-assist.org/secure/tip/contact.html
> > >
> >
>
****************************************************************************
> > *
> > > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > > http://www.tech-assist.org/secure/tip/main.html
> > >
> >
>
****************************************************************************
> > *
> > > For automatic password retrieval 24 hours a day, go to:
> > > http://www.tech-assist.org and select "Lost your Login Info?".
> > >
> >
>
****************************************************************************
> > *
> > > Access the archives here:
> > > http://www.freelists.org/archives/techassist/
> > >
> >
>
****************************************************************************
> > *
> > >
> >
> >
>
****************************************************************************
> *
> > Add a known good Tech line number or part supplier in The
> > Tech Address Book.
> > http://www.tech-assist.org/secure/tip/contact.html
> >
>
****************************************************************************
> *
> > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> >
>
****************************************************************************
> *
> > For automatic password retrieval 24 hours a day, go to:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> >
>
****************************************************************************
> *
> > Access the archives here:
> > http://www.freelists.org/archives/techassist/
> >
>
****************************************************************************
> *
>
>
****************************************************************************
*
> Add a known good Tech line number or part supplier in The
> Tech Address Book.
> http://www.tech-assist.org/secure/tip/contact.html
>
****************************************************************************
*
> Submit A Repair Tip Here, or Change/Remove your Email Address:
> http://www.tech-assist.org/secure/tip/main.html
>
****************************************************************************
*
> For automatic password retrieval 24 hours a day, go to:
> http://www.tech-assist.org and select "Lost your Login Info?".
>
****************************************************************************
*
> Access the archives here:
> http://www.freelists.org/archives/techassist/
>
****************************************************************************
*
>
>
*****************************************************************************
Add a known good Tech line number or part supplier in The
Tech Address Book.
http://www.tech-assist.org/secure/tip/contact.html
*****************************************************************************
Submit A Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.html
*****************************************************************************
For automatic password retrieval 24 hours a day, go to:
http://www.tech-assist.org and select "Lost your Login Info?".
*****************************************************************************
Access the archives here:
http://www.freelists.org/archives/techassist/
*****************************************************************************
_________________________________________________________________
Protect your PC - get McAfee.com VirusScan Online
http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
*****************************************************************************
Add a known good Tech line number or part supplier in The
Tech Address Book.
http://www.tech-assist.org/secure/tip/contact.html
*****************************************************************************
Submit A Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.html
*****************************************************************************
For automatic password retrieval 24 hours a day, go to:
http://www.tech-assist.org and select "Lost your Login Info?".
*****************************************************************************
Access the archives here:
http://www.freelists.org/archives/techassist/
*****************************************************************************
Other related posts: