Re: Mitsubishi TV model CS35MX1 weird audio problem

Nothing weird about this one at all. It is very typical in this set. Start
looking for more caps. You will find 1-2 dozen bad ones. Look in the 5 and
12 volt supplies, vertical circuit, power supply, etc.

Leonard

<captainvideo462002@xxxxxxxxx> wrote in message
news:1183066279.282891.64300@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I got this set in for a picture problem. I bypassed the PIP and
restored the pix but before doing this I noticed that the right
channel audio was out. I initially concentrated on the PIP and after
bypassing it and testing the set I noticed a humming sound from the
right channel. The humming slowly increases in amplitude and after
awhile it would occur in about one second bursts. The duty cycle, (for
want of a better term) of these bursts eventually speeds up and after
perhaps 30 more seconds short bursts of sound are then heard, (hum,
sound, hum, sound, etc), until the sound stays on permanently.
I found three caps in the audio circuit with somewhat high ESR and
replaced them. Two were 100uf 10V and the third was a 22uf 50V. This
however didn't seem to make much difference. There are two RCA outputs
on the back of the set and they are both good. Has anyone seen this
problem on one of these sets before? Thanks for any assistance. Lenny
Stein, Barlen Electronics.



.

Relevant Pages

  • Re: I Call For A Lynching
    ... Of course isolation transformers aren't particuluarly expensive, ... the unit and making a similar claim has no sound technical basis IMO. ... even I do use different types of capacitors and cables in my ... As far as caps go, there are sound reasons why caps in the signal ...
    (rec.audio.opinion)
  • Re: Teflon Film Tin Foil capacitors, and Auricaps or others
    ... begin to increase the quality of the sound in subjective ways. ... the "better" caps were or not, ... If I plug your ears with wax, and then test to see if you hear a difference between amps or speakers, would you consider that to be a valid test? ... They found the issue of the STANDARD AB-test confusing, because on the one hand they got your results -- caps A and B could not be distinguished in a normal AB test -- and yet another type of double-blind test, which automatically occured when they changed from using cap A to cap B in their amps without telling anyone, frequently resulted in a ton of letters saying how much the amp's sound had changed. ...
    (rec.audio.tubes)
  • Re: PINBOT Loud Humming Buzzing Sound from Speakers
    ... CPU to determine if the hum is coming from the CPU (Since have the ... sound is there too) If the hum goes away look a the elctrolytic caps ... electrolytic caps on the Sound board for buldging or leaking... ...
    (rec.games.pinball)
  • Re: PINBOT Loud Humming Buzzing Sound from Speakers
    ... CPU to determine if the hum is coming from the CPU (Since have the ... sound is there too) If the hum goes away look a the elctrolytic caps ... electrolytic caps on the Sound board for buldging or leaking... ...
    (rec.games.pinball)
  • Re: Mitsubishi TV model CS35MX1 weird audio problem
    ... Lenny. ... looking for more caps. ... bypassing it and testing the set I noticed a humming sound from the ... sound, hum, sound, etc), until the sound stays on permanently. ...
    (sci.electronics.repair)