[TechAssist] Re: *FIXED* Only Snow Below Ch. 51 - CTC177
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 24 Feb 2004 14:11:55 -0500
If you don't watch closley you can easily put this chip in backwards. I
have!
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
Professional Technicians only
----- Original Message -----
From: "Dan Garris" <dgarris@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 24, 2004 12:51 PM
Subject: [TechAssist] Re: *FIXED* Only Snow Below Ch. 51 - CTC177
> We fixed all (3) sets we had with the "Snow below ch. 51" problem. Thanks
to
> all for the helpful troubleshooting tips! (1) tech had a solder blob
> touching coil L7109 and smt resistor R147 near the sheild, after doing the
> TOB, and other (2) sets simply had bad U7301 stand-up IC CXA1594L in them,
> tech grabbed a replacement out of a scrap chassis (stock was out) and they
> must have "oddly" been bad also!
>
> Garris TV
> Dan Garris
> New Bern, NC 28560
> dgarris@xxxxxxxxxxx
>
> >From: "Larry E." <videotech@xxxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: techassist@xxxxxxxxxxxxx
> >Subject: [TechAssist] Re: *FIXED* Only Snow Below Ch. 51 - CTC177
> >Date: Fri, 20 Feb 2004 16:30:01 -0500
> >
> >Dan, U7301 part # 215534 is probably your problem, on U7501 the op amp
> >check pins
> >7,8,14 while channel is set to 2,3,4 etc. if always at 33 volts while
> >changing
> >channels then
> >U7301 is your problem, you`ll notice if you go to channel 52,53.54 etc.
the
> >voltage will change
> >hope this helps, should work for both chassis`s but check the part # for
> >the
> >CTC175, the number
> >I gave is for the 187, Larry E
> >
> >Larry Eastman
> >American TV & Electronics
> >Crystal River, Fl. 34428
> >
> >Dan Garris wrote:
> >
> > > We have (3) of these sets in our shop with this problem ((Only Snow
> >Below
> > > Ch. 51))
> > >
> > > Two are CTC187 Chassis's
> > > One is a CTC175 Chassis
> > >
> > > We have replaced the stand-up IC #215532 CXA1594L (used Original RCA
New
> >in
> > > bag) and checked the C7323 7pf cap and still have not fixed problem in
> >any
> > > of them. I've seen a few sets come in lately with this problem. Anyone
> >else
> > > have success after changing the stand-up IC and still having not fixed
> >the
> > > problem? What other missed components fixed your problem after the IC?
> > >
> > > Dan Garris
> > > Garris TV
> > > New Bern, NC 28560
> > > ph: (252) 638-4477
> > > dgarris@xxxxxxxxxxx
> > >
> > > >From: Bil Green <tv.vcrrepair@xxxxxxxxxxx>
> > > >Reply-To: techassist@xxxxxxxxxxxxx
> > > >To: ".TECHASSIST @ freelists . org" <techassist@xxxxxxxxxxxxx>
> > > >Subject: [TechAssist] *FIXED* Only Snow Below Ch. 51 - CTC177
> > > >Date: Thu, 19 Feb 2004 23:46:10 -0800
> > > >
> > > >Thanks to all that helped with this GE
> > > >
> > > >The stand up IC in the tuner was the problem (as most of you guys
> > > >said)
> > > >
> > > >
> > > >--
> > > >Best regards,
> > > >
> > > > Bil Green
> > > > 2001 TV VCR
> > > > Mammoth Lakes, CA 93546
> > > > 760-934-2001
> >mailto:tv.vcrrepair@xxxxxxxxxxx
> > > >
> > > >Wednesday, February 18, 2004, 10:01:33 PM, you wrote:
> > > >
> > > >BG> GE 25" TV
> > > >BG> Model 25GT515
> > > >BG> Chassis CTC177AR2
> > > >
> > > >BG> No reception below channel 51
> > > >BG> (only channels 51 on up work)
> > > >
> > > >BG> I already used the tips, and checked:
> > > >
> > > >BG> for open L7109 in tuner B+ feed to Q7102 VHF RF amp drain
> > > >BG> (12V OK too) **OK**
> > > >
> > > >BG> replace Q7403 **NO HELP**
> > > >
> > > >BG> PLEASE HELP
> > > >
> > > >
> > >
> >
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