Sharp SL-550 Guia de Resolução de Problemas descarregar pdf (Página 15)

• A-15 • Set-up/Operation

location with this edge.” The cylinder stays tilted due to friction and will stay in this

position until you change it.

Note

When tilting the cylinder, always use the two metal brackets on the two

sides of the projector and never push directly on the cylinder because it may

damage it. When changing cylinders, always reset the projector to the polar

position.

Maintaining the STARLAB Standard Projector

Changing the Projector Bulbs

The STARLAB Standard Projector has two different sets of lights that will require

replacement from time to time. Only use replacement lamps from Science First/

STARLAB.

Note

Any substitution of bulbs could cause electrical damage to the projector and

will void the warranty!

Replacement bulbs should be stored in the accessory box inside the blue netting.

Before changing any bulb, conrm that it has blown by making sure that the projec-

tor is plugged in and that the main power switch is on. The red LED in the front of the

projector should be lit. Once you have conrmed that the projector is getting power,

turn it off again and unplug it from the electrical outlet.

Replacing the Side Lamps

The two side lamps (Part # SL-551) used to illuminate the STARLAB dome have stan-

dard bayonet mount sockets and look like the type of bulb used in the tail light of a

car. To replace these bulbs, rst allow the metal cowling to cool. Completely unscrew

the cowling that covers the bulb. Once the cowling has been removed, gently press in

on the bulb while rotating it in a counterclockwise direction. After about  of a turn,

the bulb should pop out. Place the new bulb into the socket, press in gently and rotate

about  turn in a clockwise direction. You should feel the bulb lock into place. Plug

the projector back in, turn on the projector and turn the right hand dimmer to see if

the bulb lights. Replace the metal cowling.

Replacing the Projection Lamp

The STARLAB Standard Projector uses a halogen cycle projection lamp (Part #

SL-550). This micro-miniature bulb is a specially made, state-of-the-art light source.

Because of halogen-tungsten recycling, the lamp features an extremely small lament

for extra sharp star images with virtual elimination of bulb blackening. The projection

lamp is designed to operate for approximately 20 hours with the projector at the

highest brightness setting. Filament life, however, is a function of many factors and

can be greatly extended by decreasing the bulb brightness by 10% when operating

the projector.

Unlike the side lamp bulb, the projection lamp has no socket attached to it, only two

bare wires that slide directly into the head of the projector. The projector bulb can

shatter if it becomes scratched or damaged. Extreme care should be used in handling

the bulb. Skin oils and dirt on the ngers can reduce the usable life of the bulb so it

is suggested that you don’t handle it directly. Instead, use cotton gloves or a tissue.

If you must handle the bulb with your ngers directly, make sure they are clean and

dry!

The side lamp bulb.

4mm

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Metal-lined

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