[TechAssist] Re: RCA Proscan PS27115, Chassis CTC197BC. Intermittent loss of audio, just a pop sound when channels change?

  • From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 31 Oct 2005 17:23:40 -0500

I went to a Proscan PS32900/CTC197CM2 a few months ago that had no sound. I 
found the speakers turned off so I turned them back on and all appeared 
well. The remote was all screwed up so I figured it somehow got a screwy 
signal from the remote that caused it. They had no idea how to go into the 
menu to do it themselves.

I took the remote back to the shop and cleaned it and returned it.

A few days later they called with the same problem. When I got there the 
speakers were turned off again, but turning them on didn't restore the 
sound. I unplugged it for a while and that got the sound back. I told them I 
was going to check for notes on the problem and found none on TA or RW. 
They haven't called back so I guess it hasn't done it again. Maybe I'll call 
tomorrow to see, now that I've been reminded.


Russ Hoyt
Hoyt's TV
Exeter, NH


----- Original Message ----- 
From: "peggs" <peggs@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 31, 2005 2:05 PM
Subject: [TechAssist] Re: RCA Proscan PS27115, Chassis CTC197BC. 
Intermittent loss of audio, just a pop sound when channels change?


>I had a customer drop by this morning asking about a 27" RCA,CTC197.
> His sound drops out as well.
> I've heard of many instance of Cable Signals causing Audio Drop-outs,but 
> he
> said he is on Antenna Only.
> WinStips has a few tips,
> (1) Replace C11611 (10uf/16v) C11604 (3.3uf/50v) C11623 (4.7uf Or 10uf
> Varies By Chassis)
> All High Esr
> (2) Problem Wound Up Being On The Little Stand Up Board Beside The Stereo
> Decoder Ic. I Think That This Is The Srs Board. It Had A Poor Solder
> Connection On The Socket That Plugs Into The
> Main Pcb.
> (3) Cracked Solder Connections On Braces Of The Small Shield On Bottom Of
> Main Pc Board. Also Check Pins On Flyback & Focus/Screen Controls.
> (4) Replaced U1600 // Pn 237930
> Also C12304 And Cr12301.
>
> Peggs
>
> At 08:43 AM 10/31/05, Robinson Electronics wrote:
>>Can any of you Techs. when with some info on this problem? Are there any
>>cure from Thomson on this?
>>The customer said he was watching TV and the audio just quit, but would
>>make a pop sound when the channels were changed.
>>I checked the set out, plugged it in and the sound is great, no problem 
>>found.
>>I changed out some caps in the audion circuit in case of low esr, checked
>>ok though:
>>C11601, 11604, 11611, 11623, 11628, 11907.
>>I checked the audio output TDA7499, not getting hot, checks ok.
>>Played for about a hour, called the customer to pick up.
>>The customer said it played good for about 2.5 hrs. then quit after a
>>commercail came on, now just a pop sound when channels change. looks like
>>after unplugged for a while, it resets and the sound is good.
>>I saw some notes indicating Q11900 "mute xstr" as a common audio problem!
>>
>>Has anyone seen this, found a cause or cure for it?
>>Can anyone help us with this? Any info appreciated.
>>Thanks.         David.
>>
>>Robinson Electronics
>>1075 Sweeten Creek Road #51
>>Asheville, NC 28803-1757
>>Ph./Fax. 828  274-3787
>>Toll Free. 1-888 ROBELECT
>>www.robinsonelectronics.com
>>www.robelect.com
>>Mailto: RobinsonElectronics@xxxxxxxxxxx
>>
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