[TechAssist] Re: Sony CCD-TR4 mic not working.
- From: gulftech@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 18 Feb 2004 07:44:51 -0600
Maybe not--
I think those mikes are electret (sp?) mikes, with a small DC voltage
applied to the element. Maybe would work if you insert a cap (1ufd, 16v)
between the speaker and the input. Those mike elements are widely
available; maybe even at Radio Shack for a test.
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32563
850-934-8324 (Voice) 850-932-0819 (Fax)
On Wed, 18 Feb 2004 02:44:18 -0800 "George" <grndmstrg@xxxxxxxxxxxx>
writes:
> 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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