[TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
- From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 21 Oct 2005 07:08:50 -0500
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
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
>>
>>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/
Other related posts:
