Hi all, just finished the MP566-II and everything seems to work ok, but LD2 does not light green when a signal is processed (it stays dark). When saturating LD2 does light red, so this way of LD2 is working. Testing the LED shows that both directions (red and green) are ok. What I have seen is that U4.2 Pin 7 stays at -16 V whether a signal is applied or not. Does this mean that the Op Amp is dead - at least the one for the green path of LD2? I have also checked the connections and Diode-orientation of the R's, C's and D's that are components in this part of the circuitry and this also seems to be fine.
Any help is appreciated!
Thank you in advance,
Guenter
