If you look at the circuit, you can see that the reset adjustment only
affects the other half of the comparator. It should not affect pins 1,2,3
Looks like you should have about 1.1V on pin 2 (5V-3.9V)
On pin 3 you would have about 5V unless the tape enable switch is closed.
So closing tape enable switch will mute the audio.
Bob
From: "tuk88@rocketmail.com [PolySix]" <PolySix@yahoogroups.com>
To: PolySix@yahoogroups.com
Sent: Friday, January 2, 2015 11:31 AM
Subject: Re: [PolySix] Re: Non-working attenuator
To: PolySix@yahoogroups.com
Sent: Friday, January 2, 2015 11:31 AM
Subject: Re: [PolySix] Re: Non-working attenuator
I confirm that the problem come from the IC5. I disconnect the output 1 and everything works fine. I will adjust the reset circuit and try again. If it doesn't work, i'll check the different signal which fed this AOP.
I'll keep you in touch
Lucas
I'll keep you in touch
Lucas