[TechAssist] Re: Fw: 20GT375 CTC176E No channels above 50 UPDATE
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 21 Oct 2005 08:14:37 -0400
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
>
> 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
>>>>>>
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