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I measured the diodes 207,208,209


D209

measures cathode side

AM = 4,64v

FM = 4,62 v

USB = 8,10 v

LSB = 8,08 v


measures anode side

AM = 0v

FM = 0 v

USB = 8.9 v

LSB = 0 v




D208


measures cathode side (yellow marker) :

AM = 4,63v

FM = 4,61v

USB = 8,11v

LSB = 8,11v


measures anode side :

AM = 0v

FM = 0v

USB = 0v

LSB = 8,86v


D207


measures cathode side

AM = 4,64v

FM = 4,58 v

USB = 8,13 v

LSB = 8,11 v


measures anode side

AM = 5,44v

FM = 5,41 v

USB = 0 v

LSB = 0 v


i think lsb and usb are inverted from schema