[sdiy] Weirdness in the Casio VL-1 service manual

[Lanterman, Aaron D]

For some reason I’ve become oddly obsessed with the comparatively primitive Casio VL-1. It’s WEIRD:

https://youtu.be/KiMjPOsaf5Q

I’ve been puzzling over the simplified circuit in the service manual.

http://www.warningwillrobinson.com.au/manuals/Casio%20VL1%20service%20manual.pdf

Am I overlooking something or is the “envelope detector” in the upper right corner messed up?

Aaron Lanterman, Prof. of ECE, Georgia Tech
My blog on Education and Innovation: https://edupocalypsenow.wordpress.com
My blog on Electronics and Programming: https://lantertronics.blogspot.com
My YouTube channel on Electronics and Programming: https://www.youtube.com/c/lantertronics



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