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Franc Zabkar Franc Zabkar is offline
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Default Wavetek 75 (or 75A or 23) Rotary Encoder

On Tue, 12 Aug 2008 11:47:29 -0700, "Hoi Wong"
put finger to keyboard and composed:

The part# on the service manual is no where to be found, neither does it
contain much information:
http://www.stanford.edu/~wonghoi/DC/4600-05-0211.png

I just probed the connections to the Wavetek 75 board, and it seems like one
wire is grounded while two are hooked up to +5V (My mechanical encoder was
too broken to tell which lead is which). Is there any opto-encoder that
you'll recommend for this case?

Thanks.

Cheers,
Hoi


Page 121 of the Model 23 manual shows that pin 3 of SW1 is grounded
and pins 1 and 2 are switched to ground. The switched pins connect to
IN1-0 and IN1-2 of the uProc/Synthesizer PCB (page 126) via pins 1 and
2 of J13/J12. These inputs are pulled up to +5V via R21 and R22.

- Franc Zabkar
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