This is from a Precision 470 and is my back up supply.
This was dead and had blown the fuse. Found a shorted 24N60C3 in what I think is the PFC circuit and replaced it and its companion for good measure.
The supply starts fine into standby with a good standby voltage present. When asked to power up the secondaries it ticks several times a second until the power is pulled.
I am using a dim bulb tester with a 100w bulb when trying to start it. The lamp lights in unison with the ticking.
Is this indeed the PFC section and should I be looking at the driver ic that is probably on the riser card beside the heatsink ? Can I test the drive signal without pulling that card ?
This was dead and had blown the fuse. Found a shorted 24N60C3 in what I think is the PFC circuit and replaced it and its companion for good measure.
The supply starts fine into standby with a good standby voltage present. When asked to power up the secondaries it ticks several times a second until the power is pulled.
I am using a dim bulb tester with a 100w bulb when trying to start it. The lamp lights in unison with the ticking.
Is this indeed the PFC section and should I be looking at the driver ic that is probably on the riser card beside the heatsink ? Can I test the drive signal without pulling that card ?
Comment