[TechAssist] Re: Sony PTV KP53HS10 intermittent loss of green crt and brite red raster
- From: "David Lessard" <mrfixit@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 16 Jan 2003 21:50:52 -0500
OK, listening to all your hair raising stories I feel I must contribute my
one and only HV experience. I was young and inexperienced at the time and
didn't realize that a CRT could hold HV for a period of time, in fact this
TV had been sitting "off" for about a month. I was changing a pic tube, went
to remove the anode cap (with my bare fingers) and...ZAP. Needless to say
the shock travelled through my arm, across my chest to my other arm. I felt
my heart jump a couple of times, sat down for a while and had a smoke (bad
habit). What did I learn? Always discharge a CRT before servicing it.
CLEAR...ZAP...
David Lessard
Alexandria Electronics
mrfixit@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Bob@Bobs tv
Sent: Friday, January 17, 2003 9:42 AM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Sony PTV KP53HS10 intermittent loss of green
crt and brite red raster
Long time ago, Zenith used a 4 lead cap for HV hold down, don't think they
planed on the cap failing. I was working on a stock console, I had the crt
socket unplugged to see where the sizzling was. Kneeling down I plugged the
set in and the crt socket arced to my forehead.. I dropped over like a
bowling pin.. Well the HV exceeded 50k and cracked neck on tube. "Man i
have not been right since" (:-)
Bob,
Bobs TV Worcester, ma
woodman1@xxxxxxxx
Main 508-853-1482
Fax 508-853-1480
----- Original Message -----
From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, January 17, 2003 9:13 AM
Subject: [TechAssist] Re: Sony PTV KP53HS10 intermittent loss of green crt
and brite red raster
>
> Man,
> I remember about 9 years ago when I took that screwdriver to make an
> adjustment on the deflection board of a unit that a previous servicer had
> spliced the twin anodes together and sealed them with silicone but
obviously
> didn't do a great job because when she arced over to the screwdriver, I
went
> from a sitting position to completely horizontal in world record time. The
> screwdriver became lodged in the wall behind me as it had transformed into
a
> projectile. I guess the good thing of it was that I think I will NEVER
need
> viagra! But if you think thats horrifying, when I was a Sonar Technician
in
> the Navy, we had a transmitting system that was at 80 volts (No big deal,
> right?) but it was at 3000 amps for about 240,000 acoustic watts! No there
> is one I would never get a second chance with.
>
> Bob Waterman, CET® #RI-28
> Master Technician License #9109
> Service Manager
> Gemini Computer, TV, & Security Alarms
> (508)695-7302
> (508)695-7769 FAX
> geminitv@xxxxxxxxxxxxxxxx
> geminitv@xxxxxxx
>
> ----- Original Message -----
> From: "Ed Gaidies" <teltek3@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, January 17, 2003 8:39 AM
> Subject: [TechAssist] Re: Sony PTV KP53HS10 intermittent loss of green crt
> and brite red raster
>
>
> >
> > Yup...and always keep the other hand in your pocket. Waving a
screwdriver
> is
> > like rattling the bears cage. Have a healthy respect for that one,
notice
> > the lead is ALWAYS red..;-)
> >
> > -Ed-
> > Tel-Tek Electronics
> > Ontario-Canada
> > "If Apple and Microsoft can talk...why can't the rest of the World?"
> >
> > teltek2@xxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Shoreline Electronics" <jstielau@xxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, January 17, 2003 8:09 AM
> > Subject: [TechAssist] Re: Sony PTV KP53HS10 intermittent loss of green
crt
> > and brite red raster
> >
> >
> > >
> > > WOW ! Your waving a screw drive to see if it will arc! WOW!
> > >
> > > I take you have never been zapped by the 2nd anode ! Let me tell you
> > > ...your fingers & arm will go numb!
> > >
> > >
> > > Been there , done that ! Only ONCE! And never again! I saw stars!
> > >
> > >
> > > I would use a HV probe in the future to try what you are attempting
> > >
> > >
> > > ==========================
> > > Jeff Stielau
> > > Shoreline Electronics Repair
> > > 125 Beech Tree Lane
> > > Westbrook, CT 06498
> > > 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: <tvservice@xxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Thursday, January 16, 2003 2:41 PM
> > > Subject: [TechAssist] Re: Sony PTV KP53HS10 intermittent loss of green
> crt
> > > and brite red raster
> > >
> > >
> > > >
> > > > Bob or anyone on group,
> > > > I readjusted G2 controls, that has stopped the green from blanking
out
> > and
> > > > the red from getting bright. I hear aloud pop as if the anode leads
> may
> > be
> > > > arcing but can't find, tried waving my screwdriver near anode boots
> and
> > > > around flyback but wouldn't arc only pops maybe 2-3 times in a day.
> > > > Could this still be G2/focus control block?
> > > > Also I have jail bar lines on the left, suspect cap on B+ to Hor
> output.
> > > > Would you agree?
> > > > Robert
> > > > tvservice@xxxxxxxxxxxxx
> > > > H & H Electronics Inc
> > > >
> > > > ----- Original Message -----
> > > > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Wednesday, January 08, 2003 12:58 PM
> > > > Subject: [TechAssist] Re: Sony PTV KP53HS10 intermittent loss of
green
> > crt
> > > > and brite red raster
> > > >
> > > >
> > > > >
> > > > > That sounds like it may be a defective focus/screen block. I do
lots
> > of
> > > > Sony
> > > > > and have replaced a few but not for that exact symptom.
> > > > >
> > > > > Bob Waterman, CET® #RI-28
> > > > > Master Technician License #9109
> > > > > Service Manager
> > > > > Gemini Computer, TV, & Security Alarms
> > > > > (508)695-7302
> > > > > (508)695-7769 FAX
> > > > > geminitv@xxxxxxxxxxxxxxxx
> > > > > geminitv@xxxxxxx
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx>
> > > > > To: "Tech-Assist" <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Wednesday, January 08, 2003 11:05 AM
> > > > > Subject: [TechAssist] Sony PTV KP53HS10 intermittent loss of green
> crt
> > > and
> > > > > brite red raster
> > > > >
> > > > >
> > > > > >
> > > > > > Any sony experts on list,
> > > > > > picked up this unit on call yesterday, no schematic, unfamiliar
> with
> > > > Sony
> > > > > > PTV.
> > > > > > After on @ 10 minutes loses green raster filimants OK, +185 volt
> on
> > > > > cathode
> > > > > > while this tube is out red will intermittently get very brite
can
> > see
> > > > > faint
> > > > > > video in background. Green will intermittently flash back on for
> 3-4
> > > > times
> > > > > > at1 second intervals same time red will go normal.
> > > > > > does not appear to be loose connections.
> > > > > > Is this gonna be a dog!!
> > > > > > any knowledgable help appreciated.
> > > > > > Robert
> > > > > > tvservice@xxxxxxxxxxxxxxxxxxx
> > > > > > H & H Electronics Inc
> > > > > >
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