[TechAssist] Re: Sony CCD-TR4 mic not working.

  • From: "George" <grndmstrg@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 18 Feb 2004 02:44:18 -0800

Hi, Kevin the headphones should work if the impedance is high enough thou
most are way too low. If you hook it to speaker side of an output
transformer with the higher Z primary side across the input you should be
able to get some output.

George
Afana Electronics
Moreno Valley, CA

----- Original Message ----- 
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 17, 2004 11:36 PM
Subject: [TechAssist] Re: Sony CCD-TR4 mic not working.


> Can I use a set of headphones as an external mike?  I tried that and it
> did not work.  I then injected a signal where the internal mike plugs
> into the board and I got audio to the TV.  This would tell me that the
> mike is at fault.
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of greentron@xxxxxxx
> Sent: Tuesday, February 17, 2004 6:22 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Sony CCD-TR4 mic not working.
>
> If it will work with an external mike it is just a defective internal
> mike. If you strip it down far enough you may find a broken wire. I have
> subbed the basic mike element from boneyard units of other models with
> good success.
> J Silverman
> > Playback of audio and picture is perfect.  When in camera mode the
> video
> > is there but no audio.  I got the audio to come on briefly by tapping
> > the microphone.
> >
> > I replaced C413, a SM 47uF @ 6 volts cap, cleaned up the capacitor
> > leakage, and cleaned the switch for external microphone.  Still no
> > audio.  By the way the board # is 1-635-756-11.  What else can I
> check?
> > Thanks.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> >
> >
> >
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