[TechAssist] Re: GE 27GT614 CTC177BE grainy pix on some channels
- From: gulftech@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 29 May 2003 15:42:17 -0500
Dominic,
Sounds like the other shop changed the EEPROM. You need to do a complete
tuner alignment.
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32563
850-934-8324 (Voice) 850-932-0819 (Fax)
On Thu, 29 May 2003 15:22:05 EDT MDileo0000@xxxxxxx writes:
> This set came in with grainy image on some channels. Off air low
> band seems
> okay. Channel 10 and 13 are almost snowy, quite grainy. Cable shows
> similar
> symptom on upper channels. The tuner wrap had already been done by
> another shop
> some time back and the chassis shows evidence of considerable
> resoldering
> outside the tuner area. My first thought was to closely inspect
> prior work hoping
> to find a solder bridge but no luck.
> I have changed U1001 T-Chip, U7301 mixer/oscillator IC and Q7102
> VHF rf amp
> with no improvement. The voltage of the rf agc on pin 12 of U1001
> is at 8 vdc
> when on ch 13, it should be 5vdc approx. Adjusting rf agc menu
> parameter
> makes no difference. Lifting pin 12 makes no difference. I get a
> snowy image
> without any antenna which seems to indicate good front end gain to
> me.
> Some kindness and soft spoken words would be most appreciated.
> Actually some
> useful tips would be better.
>
> Dominic DiLeo
> Atlantic TV
> Freeport, Maine
>
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