From yahoo Sent Mon, Feb 25th 2019, 09:42
From yahoo Sent Mon, Feb 25th 2019, 09:42
I took a look at the old A-126 documentation. The additional parts have been added to stabilize the internal voltages (+9V, -9V). You will find probably two electrolytic capacitors (one soldered between GND and +9V, another between GND and -9V) and a Schottky diode (soldered between GND and +9V to prevent from the so-called latch-up effect). And there may be an additional Z-diode (5V1 or 5V6) that limits the control voltage for the CEM3382 to about 5V, and a 1nF capacitor that prevents high frequency noise in the quadrature VCO circuit. Best wishes Dieter Doepfer > -----Ursprüngliche Nachricht----- > Von: xxxxxxx_xxxx@xxxxxxxxxxx.xxx [mailto:xxxxxxx_xxxx@xxxxxxxxxxx.xxx] > Gesendet: Samstag, 23. Februar 2019 10:17 > An: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > Betreff: [Doepfer_a100] Re: A-126 Malfunction > > > > > > Does yours also have some parts on the solder side? > > > 4 parts are soldered at the back. ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Doepfer_a100/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Doepfer_a100/join (Yahoo! ID required) <*> To change settings via email: xxxxxxx_xxxx-xxxxxx@xxxxxxxxxxx.xxx xxxxxxx_xxxx-xxxxxxxxxxxx@xxxxxxxxxxx.xxx <*> To unsubscribe from this group, send an email to: xxxxxxx_xxxx-xxxxxxxxxxx@xxxxxxxxxxx.xxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/