Question about Celestron NexStar 8 GPS Telescope

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Long story-short version. Cord wrappedthe scope

Long story-short version. Cord wrappedthe scope now the AZM motor is jerky while tracking. Any suggestion on repair or replacement of motor?

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Very fine gears are not very fine any more
very delicate and hard to do for you
for swiss watchmaker ok to attempt
send back to factory is best suggestion.

Posted on Feb 21, 2009

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Thiscode is likely a hand controller failure and you need to call Celestron. Mine did this too. good luck, you will need it...

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Orion sells these:

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I am looking for someone in Michigan near Sunfield, I have a Meade ETX125PE that I would like someone to help me with. e-mail address is and

Contact a local Astronomy club nearby and the members will help you with the scope.

Also this is the general setup for the NON- PE version of this scope.

1. Do a calibrate motors

2. Train the drives

3. Take the scope outside and level the tripod.

4. Put the scope in the HOME position (read the manual)

5. Execute a 2 star alignment and center both stars.

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My telescope-Meade LX200GPS when tracking the star,it can catch it in some minutes ,but later the star out of eyepiece,is it not tracking the goal? when I tracking the jupiter,the telescope can find the...

To track the scope must:

1. Have a Calibrate motors done

2. Be well Trained using the training routine

3. Must have the correct TIME, DATE, and SITE, and Daylight Savings Time

4. Must be properly aligned on two stars.

Have you done all of the setup procedures listed in the manual? Locate a local Astronomy club and the members will help you with your telescope.

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I just purchased a B.L model 4000 telescope. I do not have the owners manual. It has the feature that allows you to program the unit so it stayes on a object by compansating the earths rotation. How do...

You will not find a manual. This scope has been out of production for several DECADES!

The small wedge must be polar aligned in order to track the sky. The legs must be adjusted for your latitude.

It has a motor inside that rotates the scope to compensate for the motion of the sky once the scope is polar aligned.

Read these:

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My meade LX200GPS can't track the stars? wheater the bad weather of observation points will affect the accuracy of automatic alignment? how can I improve the tracking

You must Calibrate motors using the same power source as you use at night outside, then do a TRAIN drives. Some of these scopes also have a Calibrate Sensors -- and some do not.

Then do a two star alignment and center both alignment stars. Daylight Savings Time = Yes right now in the USA, check that it is set to YES.

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I need 3 reasons for whythese problem occur and 3 suggestions for remdiation: 1-alignment 2- localization targets 3- focusing 4- tracking

1. Failure to follow the manual and do all the initial setup. Time, date, and site, and usually training the motors.

2. I don't understand #2.

3. Focus until the stars are pinpoints of light. If you see donuts with a dark center you are NOT in focus. Practice during the daytime on a distant object using the eyepiece with the largest number written on it. The moon should be your first target at night.

4. Many things, broken gears, failure to train the scope, grease on the clutches, hand controller is set for terrestrial viewing instead of astronomical viewing so tracking is NOT turned on.

Read my TIPS about GOTO scopes in my profile page.

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1 Answer

I have a meade lx90 8inch 3 years old with autostar 497--when i try to raise the scope up it keeps drifting down also having problems with intermitant slewing on set up-both motors working ok

This is called "rubber-banding". Your scope needs to be re-trained.

So, setup a target during the day at least 100 feet away from the scope (200 feet would be better, Calibrate motors using the same power source you use at night, and Train Drives. Later after dark, do a Calibrate sensors on Polaris.

You should train drives about once per year, and calibrate sensors about twice per year.

You may want to update the firmware before you Train Drives. The latest version is 43Eg available on the web site. You with need the Autostar Updater Software also available on the Meade web site under Customer Service---- Downloads. Version 5.9

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