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Author
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Topic: Doremi IMB connection issue
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Leo Enticknap
Film God
Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 03-27-2018 04:42 PM
It's not the battery: if the battery had died and the secure certificate had been lost, no amount of rebooting or reseating would have persuaded it to work again, until it had been sent back to Dolby for reprogramming.
When you saw the SM error reported by the ShowVault, was there a logical or physical tamper alarm on the projector (red tail light) as well? If so, my guess is that the problem is in the projector. A loose tamper switch and heat cycling breaking something on the backplane are both possibilities, with the removal and reseating temporarily restoring the connection.
If there is no red tail light on the projector (the projector thinks that the marriage is still good), then I'd look at the connections. The Security Manager needs a connection from the IMB to the ICP both through the backplane of the projector, and via IP, through the PCI cable to ShowVault and thence through the LAN to the projector. You will have pulled and reseated the IMB to ShowVault cable when you pulled out the IMB, I'm guessing, but try also looking at the Ethernet patch cable from the ShowVault to the management network switch, the switch itself, and the cable from the switch to the projector.
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Dave Macaulay
Film God
Posts: 2321
From: Toronto, Canada
Registered: Apr 2001
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posted 03-28-2018 08:05 AM
Server macros are stored in the SSD "flash drive" in a Showvault server. Something beyond any IMB issue is happening if you lose those. All server content - playlists, clips, patterns, and macros should show up whether there's an IMB connected or not. The errors differ, I think, between a network comms loss and a lost PCe cable connection. I don't remember the exact error wordings. My first step for this type of problem is reseating everything - network cables, PCIe plugs, the PCIe card inside the chassis, the IMB, ICP, and CCB, plus rebooting the network switch. Checking a detailed report with the Dolby online analyzer may give some clues. I generally send the report to Dolby for deeper analysis. In theory you can start up the system in any order that works for you. There are opinions for either fully booting the server first then starting the projector, for the opposite way, and for not caring. The server won't pop any errors if the projector is up first, at least with the IMB "ready" - that takes less time to boot than the projector itself so waiting for the format buttons to be normal isn't necessary but is a good clue that everything is ON. Starting the server first or alone gets you the battery warning because the secure clock is in the IMB plus other errors, but the system will connect to the IMB once that boots up and then there are no actual errors. You can reboot either projector or server any time with no lasting errors or problems. Very early server software/firmware was picky about this on Showvault systems, but not now.
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Leo Enticknap
Film God
Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 03-28-2018 11:47 PM
My commiserations: the backplane is a bugger to swap out. It's probably the most time consuming of the major components in a Series 2 Barco to replace. Even the light engine is easier, because you don't have to touch anything in front of the card cage (apart from taking the lens out).
However, a bad backplane does make sense, given the symptoms described. If you were getting erratic IMB errors and now the projector is reporting ICP communications problems after pulling and reseating everything, the backplane is the one common denominator for all the components involved.
I had a DP2K-20C last fall that presented with similar symptoms. DSS220 would not connect to cat745; cat745 log indicated nothing wrong with it; tail light on projector remained green and no tamper alert registered, even after I'd pulled and reseated the cat745. Barco's tech spotted evidence of wackiness in the diagnostic package, none of which had caused a red tail light, and from that diagnosed a bad backplane. They also sent me both an ICP and a backplane, but in the event I didn't even need to take the ICP out of its box: after the backplane was replaced, the IMB remarried using the Dallas key, and all was good.
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