[TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
- From: "J. Knoll" <jaystv@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 21 Oct 2005 08:29:55 -0400
I have had the band switching transistors cause this very problem in ctc195
and other similar chassis. Jay-Jay's TV
On 10/21/05, al m <ampm@xxxxxxx> wrote:
>
> I think you're right I will change the IF amp Today.
> Al Marquardt
> ampm@xxxxxxx
> Al Marquardt Electronic Repair
> 206 W Main
> Girardville Pa. 17935
> ----- Original Message -----
> From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, October 21, 2005 8:08 AM
> Subject: [TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
>
>
> > Haven't finished my coffee yet, meant to include the part number for the
> > IF transistor in case you didn't have it, q7601 146848, but If the
> > channels below 50 are ok I don't think it could be an AGC problem.
> >
> > The AGC feeds UHF amp q7101 200566.
> > On this set the UHF and VHF amps are the same, you could swap them
> (SMDs).
> >
> >
> >
> > Wayne Vanaman
> > Omega Electronics
> > 6904 W Fairfield Dr
> > Pensacola, Fl. 32506-3310
> >
> > Wayne@xxxxxxxxxxxxxxxxxxxxx
> > WWW.PensacolaTVRepair.Com <http://WWW.PensacolaTVRepair.Com>
> >
> > 850-456-5995 voice
> > 850-458-6369 fax
> >
> >
> > al m wrote:
> >> Thanks Wayne. Did that and the voltage changed.I'm thinking it's a IF
> >> problem and am going to change the IF amp.
> >> Al Marquardt
> >> ampm@xxxxxxx
> >> Al Marquardt Electronic Repair
> >> 206 W Main
> >> Girardville Pa. 17935
> >> ----- Original Message -----
> >> From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
> >> To: <techassist@xxxxxxxxxxxxx>
> >> Sent: Friday, October 21, 2005 7:44 AM
> >> Subject: [TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50
> UPDATE
> >>
> >>
> >>
> >>>Al:
> >>>To determine if it is an AGE problem within the processor you have to
> >>>vary the IF input and monitor the output.
> >>>
> >>>Wayne Vanaman
> >>>Omega Electronics
> >>>6904 W Fairfield Dr
> >>>Pensacola, Fl. 32506-3310
> >>>
> >>>Wayne@xxxxxxxxxxxxxxxxxxxxx
> >>>WWW.PensacolaTVRepair.Com <http://WWW.PensacolaTVRepair.Com>
> >>>
> >>>850-456-5995 voice
> >>>850-458-6369 fax
> >>>
> >>>
> >>>al m wrote:
> >>>
> >>>>I changed both IC's and same thing. I did notice the AGC isn't
> changing.
> >>>>Put
> >>>>IF in from My sencore and Perfect picture and AGC is down to
> 5V.Checked
> >>>>voltages on the op amp outputs with the cable connected and they are
> >>>>within
> >>>>( . )1V. This has got me by the balls. It;s only a 20" tv, but I would
> >>>>like
> >>>>to find the problem. Any Ideas?
> >>>>
> >>>>Al Marquardt
> >>>>ampm@xxxxxxx
> >>>>Al Marquardt Electronic Repair
> >>>>206 W Main
> >>>>Girardville Pa. 17935
> >>>>----- Original Message -----
> >>>>From: "al m" <ampm@xxxxxxx>
> >>>>To: "tech assist" <techassist@xxxxxxxxxxxxx>
> >>>>Sent: Wednesday, October 19, 2005 2:01 PM
> >>>>Subject: [TechAssist] Fw: 20GT375 CTC176E No channels above 50
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>>I know I saw this here but I can't find it in the archives or my
> tips.
> >>>>>>I
> >>>>>>think you replace U7401 for this. I know anything below 50 is U7301.
> >>>>>>Al Marquardt
> >>>>>>ampm@xxxxxxx
> >>>>>>Al Marquardt Electronic Repair
> >>>>>>206 W Main
> >>>>>>Girardville Pa. 17935
> >>>>>>
> >>>>>
>
> >>>>>-----------------------------------------------------------------------------
> >>>>>This Email List is accessible to the general public through search
> >>>>>engines. Remove: http://www.tech-assist.org/remove.htm
> >>>>>Set Vacation
> >>>>>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> >>>>>Lost Password: http://www.tech-assist.org and select "Login
> >>>>>Problems?".
> >>>>>Email Archives: //www.freelists.org/archives/techassist/
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>>
>
> >>>>-----------------------------------------------------------------------------
> >>>>This Email List is accessible to the general public through search
> >>>>engines. Remove: http://www.tech-assist.org/remove.htm
> >>>>Set Vacation
> >>>>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> >>>>Lost Password: http://www.tech-assist.org and select "Login
> Problems?".
> >>>>Email Archives: //www.freelists.org/archives/techassist/
> >>>>
> >>>>
> >>>
>
> >>>-----------------------------------------------------------------------------
> >>>This Email List is accessible to the general public through search
> >>>engines. Remove: http://www.tech-assist.org/remove.htm
> >>>Set Vacation
> >>>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> >>>Lost Password: http://www.tech-assist.org and select "Login Problems?".
> >>>Email Archives: //www.freelists.org/archives/techassist/
> >>>
> >>
> >>
> >>
> >>
> -----------------------------------------------------------------------------
> >> This Email List is accessible to the general public through search
> >> engines. Remove: http://www.tech-assist.org/remove.htm
> >> Set Vacation
> >> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> >> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> >> Email Archives: //www.freelists.org/archives/techassist/
> >>
> >>
> >
> -----------------------------------------------------------------------------
> > This Email List is accessible to the general public through search
> > engines. Remove: http://www.tech-assist.org/remove.htm
> > Set Vacation
> > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> > Lost Password: http://www.tech-assist.org and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
> >
> >
>
>
>
> -----------------------------------------------------------------------------
> This Email List is accessible to the general public through search
> engines. Remove: http://www.tech-assist.org/remove.htm
> Set Vacation mailto:ecartis@xxxxxxxxxxxxx
> ?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> Email Archives: //www.freelists.org/archives/techassist/
>
--
J. Knoll TechAssist Monitor
TechAssist
225 Monticello Ave.
Clarksburg WV, 26301
www.tech-assist.org <http://www.tech-assist.org>
www.techassist.net<http://www.techassist.net>
-------------------------------------------------------
PS:
If replying to this email, please include all previous correspondence.
It is the only way we can get the full picture. Thank You!!!
-----------------------------------------------------------------------------
This Email List is accessible to the general public through search engines.
Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
