Fanuc A06B-6120-H HV Alpha Power Supply Module - Serial. DNC offer comprehesive services for the 6120 Series of Alpha PSM HV I modules for the 400V Alpha series including alpha HV power module exchange, repair, fault diagnosis and testing facilities. 180 day warranty exists on exchange and repaired parts, transistor modules and clear-up fuses are available. For the A06B-6120 Alpha High Voltage Power Supply Modules that are not in stock, or drives that not required urgently, DNC offer a 24 hour repair turnaround service as standard on A06B-6120- though if Alpha HV power drives are urgent then same day is possible with enough advanced notice.