Sony S-VHS Pro Deck

Michael Fiedler · electronics forum beginner Joined: 01 Jun 2005 Posts: 13

I am trying to fix a Sony S-VHS Pro Deck that had no audio. After
completely cleaning the tape path I was able to restore audio, except
it has a buzz in it. Is this because the scanner is wearing out and
because the audio gets recorded in the video it is the first to be
noticed? Video looks fine.

Kim Sleep · electronics forum addict Joined: 01 May 2005 Posts: 77

More than likely your heads are becoming worn. There are 2 sets of tracks
that are usually recorded in s-vhs, afm tracks that are recorded with the
video, and longitudinal tracks that are recorded separately. Can you switch
between the 2 sets of tracks to discern if its only one set of tracks that
arte affected?

"Michael Fiedler" <MFIEDLER@nospamo.mn.rr.com> wrote in message
news:vf1s72trgoo6a0bb3bhhgjrisra4lp42ui@4ax.com...

Michael Fiedler · electronics forum beginner Joined: 01 Jun 2005 Posts: 13

I have to do some more checking, but I believe the buzz is when I am
on the "Hi-Fi" input. I will try going into the regular audio and see
what happens.On Wed, 31 May 2006 17:18:43 -0400, "K `Sleep"
<ksleep@sympatico.ca> wrote:

Mark D. Zacharias · electronics forum Guru Joined: 23 Apr 2005 Posts: 423

HiFi machines had a switch point adjustment. The procedure is pretty simple
but usually requires a service manual and always requires a dual-trace
oscilloscope. The 30 hz head switching pulse for the hifi is adjusted so
that no dropout of the hifi fm waveform is observed on the 'scope. Once
adjusted, no buzz should be audible.

Tape path misalignment can also cause the same symptom.

The head drum would have to be worn indeed to cause any similar symptom.

Mark Z.

Michael Fiedler wrote:

Google