I was curious if any others are having TC(toner concentration) sensors go out during developer changes. Even with the vacum, "tin man", and hose grounded, we've had these sensors go out from the static electricity generated by the falling developer. The techs' have said that it "just happens" even with everything grounded out. Any advice or comments welcome.

Yeah, that happens every so often. Not much you can do about it but be careful around them and make sure service has a few spares on hand in those pinches.

Have you read to latest bulletin regarding grounding?

I've had 3 year's experience on an Igen but don't recall ever having that problem. Do you see any sparks when you're changing the developers? It's always possible that the sensors are just faulty - even the new ones... Now that's a problem I have had - new parts just as bad as the ones being replaced...

Learned quickly in our 3 years of having our Igen to ground religiously. We zapped a TC sensor early on that caused us a nightmare resulting in a TC reading that was reading correct when the actual TC level was low, that actually shut our machine down for several days while they diagnosed our problem. Since using Tinman, We have had a couple of TC Reads get out of wack, that our CTIS thought could have been related to the Grounding of the Tinman. I ground from the TinCan to the Igen and I ground the Hose off the developer housing to the Can making sure the clip is at the mouth of the developer housing, hopefully zapping any residual charge prior to it entering the developer housing across the TC sensor. This has seemingly helped, but our CTIS would be happier if we had a couple more grounding wires running from the vaccum cleaner to the IGen and the other clip points on the Tin Can.