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

  • From: "tvservice" <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 31 Oct 2005 12:27:24 -0600

You fixed it when you unplugged the AC cord and reconnected it.
There is no real cure. Thomson basicly blames the HD broadcast is corrupting
the micro data and muting the micro audio. I have seen the Mitsubishi Proj
TV's and some Hitachi Proj TV's with the same problem
It affects most ctc197, ptk195, ctc203 atc113 and the itc222 and atc32x but
no so much.

Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
http://supertek.igniteinc.biz

----- Original Message ----- 
From: "Robinson Electronics" <RobinsonElectronics@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 31, 2005 10:43 AM
Subject: [TechAssist] RCA Proscan PS27115, Chassis CTC197BC. Intermittent
loss of audio, just a pop sound when channels change?


> 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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