[TechAssist] Re: Sony IK again.
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
- Date: Sat, 14 Jan 2006 09:10:07 -0800
This sounds like the classic weak picture tube to me......... but this
should be obvious by looking at the picture.
The IK circuit causes the cycling from Picture to Black, Picture to
Black....... because it is detecting a weak Tube.
Peggs
At 02:46 PM 1/13/06, Paul wrote:
>Peggs
> The tube doesn't flash like bright screen with retrace. It goes
> black. No video,no illumination. One thing that I may not have mentioned
> is that the screen control will not extinguish the raster. It will vary
> the screen voltage,and seems to be linear. That is another reason that I
> am suspicious of the control.
> Paul
>peggs <peggs@xxxxxxxxxxxxx> wrote:
> As the tube warms,the unit WILL stop flashing,unless the tube is TOO weak.
>You can 'check' the pix tube without rejuvinating it.
>The last few Sony's I've rejuvinated have had to have little, 'if any',
>gray Scale adjustments made.
>
>ONCE REPAIRED.......I always set the Screen control,by putting the set on
>Video 1 with no signal applied.and adjusting the Screen to the
>point of a barely visible raster(dark room).
>
>Peggs
>
>At 10:45 AM 1/13/06, Paul wrote:
> >Peggs
> >I can, but am reluctant to for a couple of reasons. The results are
> sometimes
> >worse rather than better,and I am not sure the picture tube is at fault.
> I was
> >tapping the screen control to see if there was any effect. It seems like the
> >problem may be in the screen control. Can't tell for sure yet. After the
> >set is
> >on awhile it seems to settle down. Still checking. Have to turn it off
> and let
> >it rest a while.
> >Paul
> >
> >--- peggs
>wrote:
> >
> > > can you rejuvinate the tube ???
> > >
> > > Peggs
> > >
> > > At 03:29 PM 1/12/06, Paul wrote:
> > > >Thanks Guys
> > > > I looked in my 27k drawer and there was three already soldered
> > > > together from the last time. I hooked them in and lost the video. Ran
> > the
> > > > screens up and has only retrace lines. Changed to 15K and had the same
> > > > thing. Picture is good without the resistors. Apparently this
> problem is
> > > > different than the IK problem. The picture is going to black
> > > > intermittently. Only lasts for a few seconds sometimes, but can adjust
> > > > screen to bring it back. Thought sure it was a Ik problem. It is not
> > > > going to a red, blue or green screen with retrace though. Set came in
> > > > dead. replaced HOT , Regulator IC,
> > > > a couple of resistors and litic in hriz. drive circuit. After I got
> > > > the thing going I found this problem. Looks like I'm not out of the
> > woods
> > > yet.
> > > > Paul
> > > >
> > > >al m wrote:
> > > > I've seen 18K and 27K, but I don't think it matters. Put them on
> > and then
> > > >adjust the color that is off.
> > > >Al Marquardt
> > > >ampm@xxxxxxx
> > > >Al Marquardt Electronic Repair
> > > >206 W Main
> > > >Girardville Pa. 17935
> > > >----- Original Message -----
> > > >From: "Larry E"
> > > >To:
> > > >Sent: Thursday, January 12, 2006 5:42 PM
> > > >Subject: [TechAssist] Re: Sony IK again.
> > > >
> > > >
> > > > > Paul, my notes say 12K but you may have to experiment once you
> > narrow it
> > > > > down to which cathode is causing the weak feedback, hth, Larry E
> > > > >
> > > > > Larry Eastman
> > > > > American TV & Electronics
> > > > > Crystal River, Fl. 34428
> > > > > ----- Original Message -----
> > > > > From: "Paul"
> > > > > To:
> > > > > Sent: Thursday, January 12, 2006 5:26 PM
> > > > > Subject: [TechAssist] Sony IK again.
> > > > >
> > > > >
> > > > >> As usual I can't find my notes for the value of the resistors to
> > attach
> > > > >> to
> > > > > the
> > > > >> KaKathodesf the pic.tube for blackout of video problems. 15K is what
> > > > >> comes
> > > > > to
> > > > >> mind but not sure. Someone with a better memory,HELP.
> > > > >> I thought it was in the data base but couldn't find that either.
> > Getting
> > > > > old
> > > > >> has its drawbacks. The other option isn't terribly appealing either
> > > > > though.
> > > > >> Paul
> > > > >>
> > > > >> Paul ,B
> > > > >> Central TV&Video
> > > > >> 911W Grand Ave
> > > > >> Grover Beach Ca.
> > > > >> (805)481-8084
> > > > >>
> > >
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> > > >Paul ,B
> > > >Central TV&Video
> > > >911W Grand Ave
> > > >Grover Beach Ca.
> > > >(805)481-8084
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> >Paul ,B
> >Central TV&Video
> >911W Grand Ave
> >Grover Beach Ca.
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>Paul ,B
>Central TV&Video
>911W Grand Ave
>Grover Beach Ca.
>(805)481-8084
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