LIGHT MAINTAINANCE

1.) Clean everything. Check with the manufacturer on recommended chemicals-- glass and window cleaners will often remove the non-reflective coating on many

lenses.

a) outside

b) lenses

c) reflector (if it won't come clean, replace it)

d) lamp

2.) Check the condition of the socket. If there's evidence of a carbon buildup in the sockets, replace it now, or at least tag it as a unit to watch.

3.) Check/replace the strain relief on the lead at both the instrument and connector.

4.) Check the wiring in the connector.

5.) Check the lamp; make sure it's the appropriate wattage. Virtually every company/theatre I've worked for has overlamped their x9s and x12s. Nothing causes more maintenance needs than an FEL where a EHG should be. :)

6.) Check the operation of the shutters. Replace if they're too badly warped or even burned through (Make sure that they produce a clean STRAIGHT line)

7.) Check the operation of the barrel. If it's finicky or sticky, pull it out and thoroughly clean out the tracks.

8.) Check the tilt-lock knob on the side of the unit. Does it lock?

9.) Tighten every nut/bolt/screw on the unit. Expansion and contraction of metal tends to loosen them.

10.) Check the C-clamp. Make sure it's not bent out of shape from being overtightened. Make sure the pan adjust nut still tightens.

11.) Bench Focus. Peak or flat, your choice.