[TechAssist] Re: *FIXED* Only Snow Below Ch. 51 - CTC177
- From: "Dan Garris" <dgarris@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 24 Feb 2004 12:51:29 -0500
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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