Re: Fisher VCR model FVH919 snowy pix.

Been ages since i repaired any VCR. The head preamp pack outputs an RF
envelope waveform. Do you have any kind of oscilloscope? We need to
observe a clean output here.Set your time base to 1msec/div and
sensitivity to 0.1 volts/div. A typical waveforms looks like this:
http://www.tangible-technology.com/helical/path.html
We need to find out if the fault lies in the drum assembly + preamp or
later on in signal processing circuits. Tape path alignment is critical
here. A head switching pule is applied to the preamp, this signal is
derived from pg.

To Rev : Sometimes the feeling of accomplishment out weighs any amount
of money received as repair fees. As long as Captainvideo has the time
and inclination to proceed i don't see any reason not to encourage him.

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