Hi,
If you have the modulation waveform at IC20 pin 12, but the pulse width is not
being modulated, maybe switch IC-1 pins 8 and 9 is not closing? If not, then the
modulation signal would not feed into the pulse width control circuit. Just something
else to check with your 'scope.
Bob
From: "zc40@hotmail.com" <zc40@hotmail.com>
To: PolySix@yahoogroups.com
Sent: Thursday, February 13, 2014 9:26 AM
Subject: [PolySix] RE: Hello . :) problems my p6 , Speedpmw & release mode manual . Help .
To: PolySix@yahoogroups.com
Sent: Thursday, February 13, 2014 9:26 AM
Subject: [PolySix] RE: Hello . :) problems my p6 , Speedpmw & release mode manual . Help .
hello Johannews ,
thank you very much, I measured the level Ic13 pin 1, the probe, and have in dc -5 to +5. That seems fine.
The IC 20 pin 12 output. I see nothing in ac, but putting the selector in DC, I see -01 to -5 v that I can modulate PWM Speed potentiometer. I do not see the waveform you told me to AC, I changed IC20, c32, ic 15. But still does not work.
Victor