This is topic NEC NC2000C Randomly Shutting Down in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.


To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=16;t=003210

---

Posted by Justin Hamaker (Member # 2165) on 01-23-2018, 07:38 PM:
 
We are randomly having an issue on two different projectors where the projector will randomly shut down. Unfortunately this isn't leaving any footprint on the projector logs that I can find.

Power Supply, Operation and Error logs are attached from when both auditoriums shut down around 8:15 Saturday night.








All of our projectors are wired with the projector side split from the lamp house. The projector side goes into a UPS.

Any feedback about where to look for the issue would be appreciated.
 

---

Posted by Steve Guttag (Member # 268) on 01-24-2018, 07:46 AM:
 
I'm not quite sure what you are showing us in the logs. I'd suspect the UPS, myself. The UPS you are using, are the batteries over 3-years old? UPS batteries should be changed every 3-5 years.

What type of UPS (double-conversion or line interactive)? NEC projectors are notorious for not tolerating ANY blips in the power. I use double-conversion UPSes on them since there is a zero transfer time on switching to UPS power (it is always UPS power). Note, Christie's can be fussy too but NECs are the most fussy.

I'm guessing that there is nothing else plugged into that UPS that might log as well? That is, if you had an automation that logged the power event, you would know that the UPS didn't maintain power.

You could experiment and yank the power cord on those UPSes and observe how those projectors respond too.
 

---

Posted by Leo Enticknap (Member # 534) on 01-24-2018, 08:00 AM:
 
Seconded. Had a support call describing the exact same symptoms on a 3240 last month. After looking at the logs and exhausting all the other possibilities I could think of, we took the card cage power supply off the UPS (I didn't personally: this was a remote site I was helping by phone, email and Teamviewer) and the problems went away.

Turned out that the UPS was a 7-year old Tripp-Lite. The theatre owner was pleasantly surprised when I revealed to her that a $50 battery replacement was likely all she needed, rather than an entirely new UPS unit. I guess that did the trick, because we haven't heard anything from her since.
 

---

Posted by Mike Blakesley (Member # 26) on 01-24-2018, 12:19 PM:
 
We had a similar issue, but luckily didn't happen during a show -- we had turned the projector completely off due to a scheduled power outage in town, and when I went to turn it back on, it wouldn't start at all. Turned out the culprit was the batteries in the UPS not having enough poop to regenerate after the power was restored. New batteries fixed it. We actually got 7 years out of those batteries.
 

---

Posted by Justin Hamaker (Member # 2165) on 01-25-2018, 08:05 PM:
 

quote: Steve Guttag

---

I'm not quite sure what you are showing us in the logs.

---