Mark D. Zacharias wrote:
VCR Gymnast wrote:
A portable Beta VCR from 1985 works perfectly except there is no
color:

1. Pre-recorded color tapes play back in B&W
2. Tapes recorded on this VCR play back in B&W on this VCR
3. Tapes recorded on this VCR play back in B&W on other known good
VCRs

Therefore, the VCR can neither record nor playback color signals. What
is the most likely cause?

Is it the 3.58 MHz oscillator, the comb filter, the color killer, or
lack of a color burst? Or, is it just a defective transistor or IC
that contains an internal B&W/color switch?

Thanks

Make sure there isn't a color / bw switch somewhere, like on the back panel.
Seen it on U-Matics, anyway...

There is no external BW/Color switch. This switch is present inside an
IC somewhere in the chroma circuit, which is a separate module in this
very small modular VCR. Even though this VCR is a Beta from 1985, it is
the smallest VCR ever made.


Mark Z.