Film-Tech Forum ARCHIVE: NEC iS8-2K - "Error

This is topic NEC iS8-2K - "Error - cover open" in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Leo Enticknap (Member # 534) on 03-01-2016, 08:46 PM:

After removing and replacing the lampholder, I got "Error - cover open" on the LCD panel after replacing it. I've double checked that the cover is properly in place and that the microswitch is closed (I heard it click as I tightened the screw).

Pressing the cancel button makes the message go away and the display say "Standby," but it still won't let me turn the projector on, and the status LED continues to flash red.

Any ideas as to how to clear this error? Do you have to do something silly, like hold a button down for 10 seconds and then enter the service code? The service manual (page 79 of the PDF) simply says that the solution is to close the cover, and doesn't mention anything like this.

Many thanks in advance.

EDIT / UPDATE - dust/crud in the microswitch. Blasted the hell out of it with a compressed air spray and the projector started.

Posted by Jim Cassedy (Member # 4115) on 03-01-2016, 11:13 PM:

I was going to suggest that you double check the door switch, since
I've had a similar experience with an NEC, but I just couldn't imagine
YOU, of all people, having "crud" in any of your projectors. But it looks
like some somehow got in there, you found it, & all is OK now

Posted by Leo Enticknap (Member # 534) on 03-01-2016, 11:19 PM:

That was the problem, sorta. One of the reasons I'd opened it was to have a good vacuum / cleanout, and also check out what state the air filters were in. Doing that must have dislodged crud, that landed in the hinge of the microswitch.

Posted by Stephan Shelley (Member # 8587) on 03-02-2016, 06:06 PM:

Might think about replacing that micro switch. Older NECs have a habit of them going bad.

Posted by Frank Cox (Member # 6258) on 03-02-2016, 06:44 PM:

Instead of replacing the switch, could you just permanently short across it, removing one proven source of failure? Or would somehow cause bad things to happen?

Posted by Leo Enticknap (Member # 534) on 03-03-2016, 01:17 AM:

That thought crossed my mind, but the little PCB with the microswitch on it has one or two other components as well, which makes me worry that trying to short the switch might activate some sort of tamper alarm. I've had enough nightmares trying to reset accidentally triggered tamper alarm errors on our other two NECs to be very anxious not to go there with this one.