Meade ETX-125PE Manual de Instruções descarregar pdf (Página 20)

MAINTENANCE AND SERVICING

CHAPTER

Unable to see an image through the eyepiece:

• Confirm that the lens cover has been removed from the

telescope.

• Confirm that the flip-mirror control (16, Fig. 1) is in the “up”

position if using the eyepiece holder (4, Fig. 1) so that light

is directed to the eyepiece (1, Fig. 1). Confirm that the flip-

mirror control is in the “down” position if using the #932

Erecting Prism or doing photography with either ETX model

(see Telescope Controls, page 6 and

PHOTOGRAPHY WITH

BOTH ETX MODELS

, page 15).

Object appears in the viewfinder but not in the

eyepiece:

• The viewfinder is not properly aligned with the telescope

(see

THEVIEWFINDER

page 8).

Slew speed does not change when you press the

SPEED key, or the telescope moves slowly even

though the fast slew speed is chosen:

• Verify that only one light is illuminated on the Electronic

Controller. If more than one light is on or blinking, the Mode

function is active. Exit the Mode function by pressing and

holding the MODE key until only one light is on (see

Electronic Controller Modes, page 11).

• The battery power may be low (see Assembly Instructions,

page 5).

Telescope does not track a celestial object:

• The telescope tracks celestial objects automatically only if it

is placed in the polar mode (see Modes of Operation, page

11) and the telescope is polar aligned (see Polar Alignment,

page 12) using the #880 (ETX-90EC), #881 (ETX-125EC)

Table Tripod, or #883 Deluxe Field Tripod (see

OPTIONAL

ACCESSORIES

, page 17). The more accurate the polar

alignment, the longer the telescope’s motor drive holds an

object in the field of view of the eyepiece. If using the Alt/Az

mode, track celestial objects by using the directional arrows

on the Electronic Controller. Automatic racking of objects in

the Alt/Az mode requires the optional #497 A u t o s t a r

Computer Controller.

Images through the eyepiece appear unfocused or

distorted:

• The magnification may be too high for the viewing condi-

tions. Back off to a lower power eyepiece (see Understand-

ing Magnification, page 9).

• If inside a warm house or building, move outside. Interior air

conditions may distort terrestrial or celestial images, making

it difficult, if not impossible, to obtain a sharp focus. For

optimal viewing, use the telescope outside in the open air

instead of observing through an open or closed window or

screen.

• If viewing a land object on a warm day, heat waves will distort

the image (see Terrestrial Observing, page 10).

• For clear viewing of objects, turn the focus knob (9, Fig. 1)

slowly since the “in-focus” point of a telescope is precise.

Turning the focus knob too quickly may cause the focus point

to pass without notice.

• The optics within the telescope need time to adjust to the

outside ambient temperature to provide the sharpest image.

To cool down the optics, set the telescope outside for 10 to

15 minutes before observing begins.

Telescope moves off a terrestrial object while

observing:

• The motor drive may be activated (see Modes of Operation,

page 11).

• Verify that the vertical and horizontal locks are tight (see

Telescope Controls, page 6).

Telescope does not move past a certain point:

• The built-in vertical or horizontal rotational “stops” may have

been reached (see Rotational Limits, page 6).

Telescope pauses when changing slew direction:

• This pause is normal (see Arrow Keys, page 6).

A terrestrial object appears reversed left-for-right:

• An eyepiece in the standard 90° observing position (4, Fig.

1) reverses an object left-for-right:. To view a correctly

oriented image requires the optional #932 Erecting Prism

(see

OPTIONALACCESSORIES

, page 17).

Meade Customer Service

If you have a question concerning either ETX model, call the

Meade Instruments Customer Service Department at

(949) 451-1450, or fax at (949) 451-1460. Customer Service

hours are 8:30 AM to 4:30 PM, Pacific Time, Monday through

Friday. In the unlikely event that the ETX requires factory

servicing or repairs, write or call the Meade Customer Service

Department first, before returning the telescope to the factory,

giving full particulars as to the nature of the problem, as well

as your name, address, and daytime telephone number. The

great majority of servicing issues can be resolved by

telephone, avoiding return of the telescope to the factory.

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