I have recently acquired a dead crown drivecore amp. The two Igbt’s in the psu were exploded, legs blown off! No pcb damage luckily. Also four 10R resistors around the gates got vaporised and two diodes blown short circuit in the gate drive. The markings on the diodes GY63. Google drew a blank. Can't tell if these are Zener’s or fast recovery diodes the resistors and diodes are SMD. The switching transistors are driven through pulse transformers so hopefully no other components in the driver stage damaged. the two transistors to discharge the gates seem to measure ok with a multimeter. does anyone have a schematic of a cdi drivecore amp? i found one on YouTube but it’s rather low res and the owner of the channel want $150 for a pdf copy. I have attached the low rez copy of the relevant page. Can’t make out which are diodes or resistors.
