Question about Celestron Advanced C102-HD (241 x 102mm) Telescope

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Hand controller not working

Hand controller unit dropped form my hand with no visual damages seen from out side. But it no more drives the telescope though while connecting with the battery pack the middle light (supposed to be in green during sidreal movement) is on in yellow mode.By touching the motor I feel the pulse that the controller delivers to the motor but very unfortunately it is not driving the telescope. Can you provide the circuit diagram? I've purchased this telescope last year from Adorama and brought in India this year.

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You have broken something inside the hand controller-- the computer is in the hand controller NOT in the telescope. Contact Celestron for a replacement hand controller or advice.

Posted on Jul 09, 2011

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Why does the hand controller light up then goes dead

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Do a RESET on the hand controller and then re-enter time date and site--

If this model has a Calibrate Motors feature in the hand controller do that also.

You must have fresh batteries in the scope or the controller will have very strange errors when the battery power drops below about 60% of full charge.

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You DID tighten the clutches-- and you do have fresh batteries in the scope?

Either the hand controller buttons are broken or you have some kind of damage inside the scope base-- or a blown circuit board on that motor.

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Either the hand controller is broken or the hand controller cable is broken-- or you habve OLD batteries in the scope.

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I dropped by LXD -55 autostar handcontroller and now the display won't light up and if it does the backlight is so low I can't read it. Can it be saved or do I have to buy a replacement?

Buy a replacement, You broke something inside the hand controller. Possibly the screen ribbon cable was jarred loose a little. After you get the new hand controller, carefully open up the hand controller and make sure the internal cables are all secure.

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Is there an user friendlier hand controller available for the Ultima 2000? Does the wedge make much of a difference?

The wedge is only used if you take astro-photos. You do not need it for visual observing.

Contact Celestron support about the hand controller here:

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Do you have a fresh set of batteries in the scope? Better to use an outside 12 volt power pack with the Celestron 12 volt "cigarette" lighter cable.

This can be three things:

Low power

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Or a broken hand controller

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I've seen a couple of things cause this problem. Both can probably be fixed by you.

The first thing to try is to look at your power connector on the telescope. You'll see a pin sticking up with a split in the middle. Take a small knife or screwdriver and very gently pry that **** slightly apart. I've seen where that compresses and it becomes intermittent.

The other thing I've seen is an intermittent connection between the hand controller and telescope. This can happen on the controller end or telescope end. The AUX ports will work for the hand controller too. Try it in those ports and see if things improve.

If they don't, then you could have a loose connector on the hand controller. Mine was bad enough that if I wiggled it the controller would either go blank or lock up. I fixed mine by getting a telephone crimp tool and crimping it. It's worked fine since then.

You may also wish to check out the CPC group on Yahoo Groups.

Good luck!


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You damaged the circuits inside the hand controller-- unless you are an electronics whiz these cannot be repaired.

However you can find them for sale directly from Meade and on Ebay (used) usually for about $80.

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