[TechAssist] Re: RCA 27" TV Stereo - F276388C - CTC187AB - Scrambled Video - Buzzing Sound - Followup
- From: "David" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 14 Jan 2005 21:31:31 -0500
Composite IN is perfect. Problem is somewhere in the tuner!? It's as if
the AGC circuit is out of whack. It takes about a minute (if not more)
for the picture to lock. At first the picture starts out with horizontal
white lines (buzzing audio), then scrambled vertical bands of color
(superimposed on a faint picture - audio buzzing) which eventually locks
to a good picture. Someone on the list sent a tuner diagram, I may be
forced to learn more then I want to about these tuners. Any pointers
would be appreciated.
Thanks,
David Lessard
Mr_fixit@xxxxxxxxxxxx
Alexandria, Ontario, Canada
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Gemini Computer &
TV
Sent: Friday, January 14, 2005 3:42 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: RCA 27" TV Stereo - F276388C - CTC187AB -
Scrambled Video - Buzzing Sound
On all inputs or just tuner?
Bob Waterman, CET=AE #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
----- Original Message -----=20
From: "David" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, January 14, 2005 12:05 PM
Subject: [TechAssist] RCA 27" TV Stereo - F276388C - CTC187AB -
Scrambled
Video - Buzzing Sound
> Hi Techs,
>
> When first powered-up the picture is all out of whack, i.e. scrambled
> image, white noisy (horizontally) scrambled looking image with buzzing
> audio. After a minute the picture gradually comes in better and better
> until it's just fine. Turning the TV off and then back on has no
effect.
> The TV must be turned off for an hour or so before the same problem
> reoccurs. The problem is not affected by mechanical vibrations. I'm
> stumped! Has anyone seen this before? I'm not sure where to begin
> looking for this problem as I do not have a schematic for this
chassis.
>
> Thank-you.
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
>
>
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