Sharp SL-550 Guia de Resolução de Problemas descarregar pdf (Página 19)

• A-19 • Set-up/Operation

Changing the Projection Cylinders

All of the projection cylinders used on the STARLAB planetarium are designed to work

in the same way. They are made out of lm and should be handled gently because

they are easily crushed. Cylinders should be handled from the top and bottom rather

than the sides. Before touching the cylinder, hands should be cleaned and free of

hand lotion and perspiration.

Cylinders are held on the projector by four magnets attached to the clear plastic

cylinder platform. At the bottom of each cylinder is a 2.5 inch diameter hole with a

small notch cut into it. The hole allows the cylinder to be placed over the top of the

projector and the notch lines up with the small white tab (cylinder alignment key) on

the cylinder platform of the projector. When changing cylinders, the latitude adjust-

ment bar must be set at 90 degrees in the polar position (straight up and down) and

the clear plastic plate should be horizontal.

Warning

Changing cylinders when the support plate is tilted can cause severe dam-

age to the projector!

Note the position of the cylinder alignment key on the cylinder platform and carefully

slip the cylinder over the top of the projector until it rests on the clear plastic platform.

Hold the platform with one hand so it does not rotate and slowly rotate the cylinder in

either direction until the notch on the cylinder lines up with the cylinder alignment key.

Note

On most cylinders the notch is directly under the seam on the side of the

cylinder.

When this happens, you will hear a “click” and the cylinder will lock into place. To

remove the cylinder, rst make sure that the projector is set for 90 degrees latitude

(straight up and down). Grasp the cylinder at the sides directly under the top ring and

gently pull straight up until the cylinder pulls free of the magnets. The magnets are

quite strong so don’t be surprised if it requires a little force to remove the cylinder.

Note

When cylinders are not in use, they should always be stored in either the

projector case or one of the cylinder cases. Never leave a cylinder loose on

the ﬂoor where it can get damaged!

Controlling the Projector Brightness

Note

The STARLAB FiberArc Projector is unique because it uses a high-intensity

arc lamp to illuminate the projection cylinder and display the images on

the dome. Because of its design, the arc lamp requires about one minute to

reach its full brightness. If t h e p r o j e c t I o n l a m p Is t u r n e d o f f f o r a n y r e a s o n , y o u

m u s t w a I t a t l e a s t 3 m I n u t e s f o r It t o “r e -c y c l e ” b e f o r e t u r n I n g It o n a g a I n .

Before turning on the projection lamp, you must make certain that the projector head

is free to swing back and forth. When the projector is packed for shipping, a Velcro

strap is wrapped around the projector head to keep it stable. Remove this strap by

gently pulling it free and place it in a safe place (such as the accessory box) because

you will need it for packing up the projector again.

After you have turned on the projector and removed the Velcro strap, slide the on/off

switch immediately to the left of the knob labeled “Projection Brightness” to the “On”

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