[TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 21 Oct 2005 16:09:24 -0400
Ok this is getting put aside.I changed the UHF FET and checked all the
voltages on the IC's and they are all close. I changed the 1001 IC, the IF
amp, C1702 and still have problem. I reprogrammed the setting in the service
menu.Checked all the parts surrounding the UHF FET. If I put a signal in at
Pin 1 of IC 7301 I get perfect picture. I think maybe it could be a EPROM
problem but I don't have one to change. Another thing is maybe someone
turned the coil and I'll have to start from scratch. In that case no repair.
I'll post when I get back to this. I hate being second in the back of these.
Thanks to all who helped.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "John Conti" <contitv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, October 21, 2005 9:19 AM
Subject: [TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
> AL, did you check Q7404, and C7102.
>
> John
> Conti,sTV
> Texas
>
>
>>From: "al m" <ampm@xxxxxxx>
>>Reply-To: techassist@xxxxxxxxxxxxx
>>To: <techassist@xxxxxxxxxxxxx>
>>Subject: [TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
>>Date: Thu, 20 Oct 2005 19:53:22 -0400
>>
>>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
>> >>
>> >
>> >
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