search

sinara-hw / Sayma_AMC

AMC FPGA carrier board with FMC, dual SFP and RTM
8 stars 6 forks source link

flimsy µTCA hotplug switches on NAT modules #144

Open sbourdeauducq opened 4 years ago

sbourdeauducq commented 4 years ago

The hotplug switches on NAT modules (NAT-MCH and AC-600D power supply) are unreliable.

Sometimes the crate shuts down because a slight vibration of the table caused a glitch in the switch and detection of a hotplug event. Or sometimes, the hotplug handle, even though it is fully inserted, needs to be wiggled a bit for the crate to start.

Is this a known problem and what is the solution?

jbqubit commented 4 years ago

@vdirksen and @gkasprow might have thoughts on this.

kaolpr commented 4 years ago

Unfortunately @vdirksen passed away this year.

marmeladapk commented 4 years ago

One of @jbqubit 's MCH also exhibits this behaviour.

jbqubit commented 4 years ago

I've sent notice about this and several other Issues to support@nateurope.com.

jbqubit commented 4 years ago

Response from NAT is below. It looks like they didn't even read this Issue. I'll encourage them to use github.

There should be no principle problem with the hotswap handles. Does this happen with one specific module, one module type (PM, MCH) or with multiple? Do you see any unusual mechanical behavior of the handle?