[TechAssist] Re: fix. RCA F35700SB/ CTC169BD5 slick red/retrace betweenchannels

  • From: <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 9 Feb 2004 08:56:58 -0600

seen it a couple hundred times
though usually just bright white raster with retrace lines
suspect tube may be soft causing the b&w tracking (gray scale) to be off...
red raster

Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX

----- Original Message ----- 
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, February 07, 2004 9:52 AM
Subject: [TechAssist] fix. RCA F35700SB/ CTC169BD5 slick red/retrace
betweenchannels


> Thanks to all.
> It was Q2906, with about 50 ohms leakage. I happened to have an RCA
> transistor #147665 that also crossed to an NTE159 that works great.
> Funny, this is a lum buffer transistor,not a red driver, but why did I
> get a bright red flash? not green or blue?
> And what made you zero in on Q2906? Would not be my first choice.
> ;-)
> BTW I will also change CR4118 as precaution before it leaves the shop.
> Phil
>
> Webster TV wrote:
> >
> > Phil,
> >
> > I just fixed a CTC169, with the same problem. The fix was replacing
Q2906
> > luminance buffer transistor. I used a NTE 159 and it worked fine.
> >
> >                                     HTH
> >                                     Dan Webster
> >                                     Webster's TV
> >                                     Shullsburg, Wi.
> > ----- Original Message -----
> > From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, February 06, 2004 4:12 PM
> > Subject: [TechAssist] RCA F35700SB/ CTC169BD5 slick red/retrace between
> > channels
> >
> > > Strange. Customer complaint was "dead".
> > > I powered it on in shop.had a slightly too bright picture with retrace
> > > thru pix.
> > > Also when I change stations, while between, the screen flasher to a
> > > bright red slick raster with retrace, only appearing while in the
> > > transition between stations.(split second).
> > > The white OSD characters when i push "menu" have a red haze around
them.
> > > I lowered the G2 slightly and lost the retrace in the normal picture.
> > > Any histories on this?
> > > Phil Bader
> > >
> > > --
> > >
> > > Philip Bader
> > > Jan Phyl TV Inc. (estab. 1976)
> > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > Fax (863) 299-8821
> > > email: tjanphyl@xxxxxxxxxxxxxxx
> > >
> > >
> > >
> >
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> -- 
> Jan Phyl TV Inc
> 3420 Recker Hwy.
> Winter Haven, Fl. 33880
> fax: 863-299-8821
> (professional. technician calls only)
>
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