M
AINTENANCE
:
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2 5 M a r c h 2 0 1 1
19
•
When the lamp is struck, the luminaire should be maintained in a horizontal position when
not in use.
•
For arc lamp luminaires, heads should be tilted horizontal before starting lamps. Lamps
generate light by an electrical discharge arc, whereby the electrons from two electrodes
excite the fill components to give off light. Because of the alternating current “position”,
the electrons are alternately given off by the two electrodes. When a lamp is set in a
vertical position, the halogen-metal compounds, which determine the color temperature of
the lamp, collect at the top end of the glass envelope. When the lamp is started, color
deviations occur since the concentration of halogen compounds is greater around the top
electrode than the bottom electrode. In addition, the fill components that are difficult to
vaporize congeal around the bottom electrode, thereby reducing lamp life.
Solid State Electronics
Electrostatic Discharge (ESD)
Electrostatic discharge (ESD) presents a significant danger to solid state electronic
components (semiconductor devices and PC board assemblies). Static electricity can build on
a variety of common objects (including people) simply by handling or moving. ESD rarely
results in immediate failure of a component, but shows up later as an intermittent problem or
severely reduces the life of the component. All VARI
❋
LITE equipment uses solid state
electronics and appropriate precautions to protect them should be observed when servicing.
Printed Circuit Boards (PCBs)
All PC boards should be shipped in electrostatic shielding bags. When handling PC boards or
components, devices such as conductive mats and conductive wrist straps should be used
whenever possible. If these precautionary devices are not available, handling of PC boards and
components should be avoided.
CAUTION:
Black foam (used to package solid state electronics) should never be used for
packing batteries or put in contact with PC boards which contain batteries.
Summary of Contents for VL550
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Page 13: ...SAFETY NOTICE JAPANESE 02 9683 0010 0 25 March 2011 xiii...
Page 14: ...VARI LITE VL550 WASH LUMINAIRES SERVICE MANUAL xiv 25 March 2011 02 9683 0010 0...
Page 18: ...VARI LITE VL550 WASH LUMINAIRES SERVICE MANUAL xviii 25 March 2011 02 9683 0010 0...
Page 68: ...VARI LITE VL550 WASH LUMINAIRES SERVICE MANUAL 50 25 March 2011 02 9683 0010 0 Notes...
Page 102: ...VARI LITE VL550 WASH LUMINAIRES SERVICE MANUAL 84 25 March 2011 02 9683 0010 0 Notes...
Page 120: ...VARI LITE VL550 WASH LUMINAIRES SERVICE MANUAL 102 25 March 2011 02 9683 0010 0 Notes...
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