Regular Maintenance on CS4 LED unit

Hi

the maintenance for a regular S4 is pretty basic:  clean lenses, clean reflector (carefully), check shutters and lamp base, dust outside (plus make sure all the washers and clips are in place).  I guess it's even more simple for a CS4 unit, since we can't access the LED engine.

we can dust the exterior, but what about the fan:  is it sucking air INTO the unit to cool the Heat Sink, or pushing air out?

A tech here says that we shouldn't allow the fan to spin if blowing canned air into the fan unit to dust it.  "it will build up a static charge."  True or false?

Anything we need to pay special attention to when cleaning a CS4?

Thanks.

Andrew Riter

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