Film-Tech Forum ARCHIVE: NEC NC2000C ICP Fan Stop Precaution

This is topic NEC NC2000C ICP Fan Stop Precaution in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Justin Hamaker (Member # 2165) on 11-09-2018, 03:48 PM:

Started up Friday and received an ICP Fan Stop Precaution. I assume this is because the ICP fan stopped working. But I can not figure out where the fan is from the diagrams. Any feedback?

Posted by Steve Guttag (Member # 268) on 11-09-2018, 04:24 PM:

It is right above the ICP module blowing down right on the heatsink of the CPU of the ICP. The fan is mounted on the NEC CPU board. It is also known as FAN7

Posted by Dave Macaulay (Member # 813) on 11-10-2018, 08:59 AM:

And you do want that fsn running. The ICP FPGA that it blows on makes a lot of hest. It usually goes to 60C with the fan working.

Posted by Tony Bandiera Jr (Member # 2365) on 11-10-2018, 10:49 AM:

quote: Dave Macaulay
And you do want that fsn running. The ICP FPGA that it blows on makes a lot of hest. It usually goes to 60C with the fan working.

LOL someone was a bit tipsy, here's the translation:

quote:
And you do want that fan running. The ICP FPGA that it blows on makes a lot of heat. It usually goes to 60C with the fan working.

Just teasing Dave...I tend to do things like that too when typing too fast, especially on my phone.

[Big Grin]

As for NEC and the term "Fan Stop Precaution", reminds me of the checklist for the old Concorde jet..when an engine fails, according to the checklist, the opposite engine doesn't stop, it performs a "Sympathetic Unstop" [Roll Eyes]

Posted by Mark Gulbrandsen (Member # 72) on 11-10-2018, 02:14 PM:

I haven't had one actually fail yet, nor any fan fail in an NEC YET... but I replace the ICP fan, the "Power On" and "AC On" fans that are up in the front of the projector at the 5 to 6 year mark as a precaution. These three fans are the system critical fans for the NC-1200 and NC2000. If the ICP fan does stop running the ICP will not burn up. It will run outside it's high temperature parameter and the projector will throw an error and it will likely just shut it self off, similar to a lamp overheating if you forgert to run the stack blower. Similar things will also happen for your customers that forget to change out the air filter in the front of the projector that hides behind that almost never used Real-D thinga majiggie that you installed and forgot about... I saw one hit 72C! Yes, it was throwing a high temp warning... Burp!
Mark

Posted by Mike Blakesley (Member # 26) on 11-10-2018, 02:28 PM:

Yep that front filter got me the first time around..I just never thought to look for a filter there. Boy was that thing an ugly mess the first time I changed it.

Posted by Mark Gulbrandsen (Member # 72) on 11-11-2018, 09:19 AM:

The worst I've ever seen that front filter it is about 1" of fuzz and crud in Central Utah....

Posted by Dave Macaulay (Member # 813) on 11-11-2018, 09:48 AM:

This hasn't happened on an NEC for me, but a Barco 12C had its power supply fail overnight - no 24VDC. The 12VDC was fine... 12V powers all the electronics, 24V powers all the fans. All the electronics boards overheated severely and failed permanently as it sat there for hours. There was no overtemp shutdown of anything. Luckily in warranty.
So now I recommend shutting projectors off overnight. I don't think any VPF restrictions are still in force expecting systems online and powered 24/7 - and that was a crazy requirement at best.

Posted by Mark Gulbrandsen (Member # 72) on 11-11-2018, 10:42 AM:

My VPF customers completely ignored that requirement and shut them off anyways... Told Cinedigm/Wrong they'd leave them powered on IF they compensated the theater for power consumption. Neither Cinedigm or Wrong ever questioned it after that. Cinedigm needed the screens and customers! The remainder all went with the GDC VPF once it became available as it didn't have that silly requirement, nor did it really require a NOC. NOC's are always the last to know and the last to hear from when there is a problem anyway...

Mark