Question about Meade LX90GPS: 8" LX90 GPS Telescope

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The dec, knob must have streped on my 2000 LX90.

The dec, knob must have streped, the knod keeps turning and scope will not lock it is a 2000 LX90 If there is and esey fix or do I have tosend it to Meade?

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Look at this for a possible fix--

http://www.scopestuff.com/ss_ezck.htm

Posted on Jun 28, 2009

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1 Answer

I have a piece of meade carp that I have been trying to get a fix for many years. The scope currently performs a very useful service here, it keeps a door open. The problem is that the prism does not...


The Meade 8" SCT LX90 is a very good all round unit. Although angry, you will find it is well worthwhile persevering.
The back plate, called the optical back, takes an eyepiece holder into which you can also fit your diagonal prism for comfortable viewing. It is part 3 in the diagram here, Fig 1
http://www.meade.com/manuals/TelescopeManuals/LXseries/LX90-LNT.pdf

All you need is the right size holder for this scope, such as
http://www.bhphotovideo.com/c/product/202598-REG/Meade_07182_Eyepiece_Holder_aka_Visual.html

Any telescope shop can sell you one, but take care to get one that also fits the barrel of your prism, which will be either 1.25" or 2"

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Meade lx-90 dec printed circuit board bad. where


Since you already disassembled the scope-- you can send the board to Ron Sampson and he should be able to repair it. He fixes main boards and hand controllers (including the screen and keyboard on the hand controller!)

If you post a message on the Yahoo LX90 group looking for Ron Sampson he will answer you. You can then email or phone him for instruction on how to send him the board.

ARE YOU SURE it's the board? It could be a bad keyboard or a bad cable on the hand controller. You should get another hand controller and cable and test it before you send it off. Can you borrow a hand controller and cable from anyone.... or from a local scope retailer?

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Me too!


You might try www.scopestuff.com

They have one for an LX90, and an LX200.

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On my lx 90 LNT the DEC wheel came off, unable to reattach...?


You broke something??? Possibly this clutch kit will help you repair the scope-- or a return to Meade will be required.

http://www.scopestuff.com/ss_ezck.htm

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Backlash on scope tube meade lx90


The washers are there for a reason-- there is an adjustment screw for the worm gear-- and the Dec axis works off a friction clutch when you tighten the knob on the fork arm.

Are you talking about the center bolt on the tripod that holds the telescope on the tripod-- ??? If you overtighten this it will interfere with the rotation of the telescope....and can break the motor.

Here is Jan's LX90 web site with disassembly instructions and pictures--

http://jan.eaglecreekobservatory.org/

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LX90 Dec pointing out by 4 degrees over run


Go onto www.cloudynights.com and post this in the LX member forum-- and or go on YAHOO groups and post this in the LX90 forum--

Are you absolutely sure that your TIME and DATE and DAYLIGHT SAVINGS (yes-no) are correct.

On my LX90 the first alignment star is always NOT in the eyepiece but everything is OK once I center both alignment stars.

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1 Answer

Locking screw


You will need to check out the clutch mechanism in the fork arm. Refer to this web site for disassembly pictures.

http://jan.eaglecreekobservatory.org/

Look under Declination adjustment link off the main page.

www.scopestuff.com
sells an upgrade clutch kit that improves the clutch. However if something is broken inside then this must be fixed first. Meade will want the scope returned. They usually do not sell parts; but sometimes they do sell them, so call Customer Service here:
http://www.meade.com/support/index.html

Oct 26, 2008 | Meade 8" LX90 LNT Schmidt Cassegrain...

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The RA knob has a setscrew that fixes it to the shaft. Just need to find the correct size and tighten.

Jul 06, 2008 | Meade LX200GPS Telescope

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My great Meade LX6 10 ", F/6.3 scope...has developed a vexing problem in the hand paddle controller attached to the RA & DEC encoders. After starting to initialize or boot up....it suddenly goes...


My scope sat in a basement for years and when I started it up I got an error the same as you discribe. Through sear luck I found it to be a bad connection where the encoder wire pluged into the battery box.

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