[TechAssist] Re: Sony KP46v15
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx,<techassist@xxxxxxxxxxxxx>
- Date: Fri, 26 Mar 2004 09:10:15 -0800
I ask that because I had removed the CRT PCB on the Red CRT
to see if it would fire up.I did that before I disconnected the FLyback's
input to the HV Splitter.
I guess the Pix Tube's Anode is what you are talking about being 'bad'
Peggs
At 08:55 AM 3/26/04, peggs wrote:
>bob,
>how would I verify a shorted Pix tube
>
>Peggs
>
>At 04:23 AM 3/26/04, Gemini Computer & TV wrote:
> >Sounds like you have have a bad CRT but see the following:
> >
> >SYMPTOMS: Cust. complaint of intermittent picture. When first turned on
> >timer led flashed, but no picture appeared. Troubleshooting revealed no=
> high
> >voltage being produced.
> >
> >RESOLUTION: Verified Hor. Drive to N bd. voltage check Q811 collector=
> showed
> >no 115v through flyback, Tracing back on PC board revealed crack on PC=
> board
> >beneath L805 & C803 interrupting 115v supply to flyback. Jumper wire across
> >crack restored high voltage & picture.
> >
> >-----------------------------
> >
> >SYMPTOMS: Relay clicks twice. Replaced shorted H. Out.
> >
> >CAUSE: Found a little star hole under the yoke and was causing to shut down
> >
> >RESOLUTION: Found problem on N Board, IC-l802 arcing.
> >
> >
> >
> >
> >
> >
> >
> >Bob Waterman, CET=AE #RI-28
> >Master Technician License #9109
> >Service Manager / Parts Manager
> >Gemini Computer, TV, & Security Alarms
> >(508)695-7302
> >(508)695-7769 FAX
> >geminitv@xxxxxxxxxxx
> >geminitv@xxxxxxx
> >www.geminicomputertvsecurityalarms.com
> >
> >
> >
> >
> >
> >
> >
> >----- Original Message -----
> >From: "peggs" <peggs@xxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, March 25, 2004 6:35 PM
> >Subject: [TechAssist] Sony KP46v15
> >
> >
> > > Set came in with a complaint of No Power and 'flash' behind the right
> >speaker
> > > at Power on.
> > > I get immediate shutdown at plug-in.I think the Flash is a relay closing
> > > but not sure.
> > > Anyway,I disconnected the flyback input to the HV Splitter and the set
> >fired up
> > > at plug-in.
> > > I put the flyback anode back in to test the Picture tubes one at a
> >time,but
> > > before
> > > I disconnected any of the Tube anodes from the HV splitter,I plugged it
> >back
> > > up.Set came on momentarily then died.Now I don't even get shutdown,it's
> >dead.
> > > Found on the 'N' board Q811 2sd1887 shorted,andQ801 2sd2555 shorted.
> > > also on the 'G' board found Q603 and Q614,both 2sc4582, shorted and
> > > R604 .1 ohm open.
> > > Tritronics has HV Tripler as 1-453-108-11,replaced by -12, $140.94=
> retail.
> > >
> > > Has anyone been down this road,or have some tips on this set.
> > > It belongs to a good friend
> > >
> > > Peggs
> > > Peggs' Electronics
> > > 1519 West 2nd Street
> > > Owensboro,KY 42301
> > > 270-926-4968
> > > fax 270-686-7399
> > > peggs@xxxxxxxxxxxxx
> > >
> > >
> > >=
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