[TechAssist] *** Thomson CTC203 Audio Drop-Out Nuisace Fix ***
- From: "Danny Garris" <dgarris@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 10 Jan 2006 13:27:42 -0500
Thanks to Jeff Stielau @ Shoreline Electronics Repair;
Here is the fix (mod) for this Common Audio Problem....happening on all the
195,197 & 203's
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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RCA CTC203
# Thomson Audio Drop-Out Nuisace Fix
There Has Been A Situation When In Some Rca/Ge Televisions A Low-Level,
Scratchy-Sounding Noise Comes Out Of The Speakers Instead Of Normal Audio,
Or When Video Is Muted. These Problems Can Occur When Invalid Xds Data Is
Broadcast By Television Stations And Received By Certain Thomson Television
Receivers. Xds Data Is Digital Information Placed Within The Video Signal'S
Vertical Interval Of An Analog (Ntsc) Television Transmission. This Data Is
Used By The Microprocessor In The Television Receiver. It May Be Transmitted
From Any Analog Television Channel.
A Fix That I Have Been Recommending To Our Techs Is To Place A 1uf 50v
Capacitor To Ground On U13101(15). This Swamps The Closed Caption Data To
The Micro And Stops The Reception Of The Defective Data Packet. In The Event
That Later On The Resolve The Defective Data Problem The Capacitor Can Be
Removed. Obviously The Closed Caption Feature Will Be Crippled With This
Capacitor Installed.
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
Thanks Jeff for this info, This is what I've been doing also. We use pin-30
of U13101 as the ground point. You don't have to take the chassis apart,
just place a 1uf @ 50v Cap physically right on top over the IC, (piggy-back)
I recommend stripping a short piece of insulation off a small piece of wire
or using heat sink tubing on the caps leads and runing (positive to pin-15)
(negative to pin-30) to U13101.
Garris Radio & TV
Danny Garris
New Bern, NC
dgarris@xxxxxxxxxxx
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