[TechAssist] Re: Sony KP46v15
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
- Date: Fri, 26 Mar 2004 10:03:03 -0800
no way of checking the tube(I should have said Blue before)
without repairing these pcb's ???
Peggs
At 07:33 AM 3/26/04, Gemini Computer & TV wrote:
>Correct and some can be seen glowing or arcing down the neck. I have had
>three in the past couple of weeks.
>
>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>; <techassist@xxxxxxxxxxxxx>;
><techassist@xxxxxxxxxxxxx>
>Sent: Friday, March 26, 2004 12:10 PM
>Subject: [TechAssist] Re: Sony KP46v15
>
>
> > 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=3D
> > > high
> > > >voltage being produced.
> > > >
> > > >RESOLUTION: Verified Hor. Drive to N bd. voltage check Q811=
collector=3D
> > > showed
> > > >no 115v through flyback, Tracing back on PC board revealed crack on=
PC=3D
> > > 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=3DAE #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=3D
> > > 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
> > > > >
> > > > >
> > > > >=3D
> >
> =
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