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Topic: Light Engine failure NEC NC1600C

Marcel Birgelen
Film God

Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012

posted 09-26-2017 07:32 AM

Finding intermittent tripping RCDs can be quite a painstaking task, the important thing is that you approach it with a plan, so you can isolate the cause of the problem. So, first try to figure out which circuit it is and then try to figure out if it's some equipment or the wiring itself, causing the problem.

It's hard to give some definitive answer and sure, it could just be some real bad luck.

But given the presented "evidence", to me, this still looks like the fallout of a power surge. It's not impossible it entered through the network. The intermittently tripping RCD might be unrelated, but could still be an indication of some equipment having been badly damaged.

I've seen similar problems, were the surge entered through the telephone line and entered into the network via the DSL router and although both the switch* and router survived, several devices on the network lost their network ports. Some of them would even show a carrier on the switch, but simply didn't forward any frames.

* In that particular case, the switch died about two months later, which might have had unrelated causes, but was a little to coincidental.

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Peter Foyster
Expert Film Handler

Posts: 102
From: ROLEYSTONE WESTERN AUSTRALIA
Registered: Aug 2016

posted 09-26-2017 08:51 AM

Thanks Marcel

Actually the latest RCD saga is at my house, not the cinema.

It is interesting, though, that you mention how a component died some months after the initial fault. As I don't know exactly when the light engine was damaged, it is not inconceivable that the faulty Air Con RCD, the slowly failing Projector control panel and the communications breakdown may all be connected to the same event, just being discovered at different times or their failure was delayed.

I find it hard to believe too, that the dying of the Cinema laptop, which had worked faultlessly for two years prior, was unrelated and just happened to occur at the same time as the other failures.

Like what you described, it just seems a little TOO coincidental.

With the home saga, there are three main RCDs so I can eliminate several possibilities as being the cause, such as the spa and air conditioning which run on separate RCDs. For at least the last 5 hours the RCD has not tripped, although I have the fishpond pump and a large freezer for secondary storage for the cinema currently unplugged, so we will see what happens when I plug them in again in 12 hours or so.

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