Board reference
ZX7-250 Pulse Driver Signal Board Checks
Driver-signal board reference for ZX7-250 IGBT faults, repeated power-device failure and missing gate-drive output.
Checks
- Verify driver supply rails before checking waveform.
- Compare gate-drive outputs between channels.
- Inspect pulse transformer, gate resistors and connector pins.
- Do not install new IGBTs until the driver path is verified.