Question about Meade 8" LX90 LNT Schmidt Cassegrain Telescope with SmartFinder w/ FREE UPS

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Actually, its NOT about an LX90, but rather my Meade LX6 10", f/6.3 scope...whos hand controller is displaying error messages from the encoders on power up. Can you help me? Great scooe, recent problem, no help from Meade AT ALL. Thanks, Jeff Thompson, JeffTcom@aol.com, (336) 712-3341

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Thanks Paulmo....but adjustments and cleaning haven't fixed it....and I have tried some other encoders, but they were not successful.....probably since they were NOT the exact matches to the Meade encoders.

Looks like NObody has a solution. But keep trying and let me know if YOU haver some success.

Thanks again. JeffTcom

Posted on Sep 18, 2008

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The motors have encoder wheels, that pulse when the motor turns, to tell the computer that everything is OK, and to indicate its position. If the wheel is loose on the shaft, then errors are indicated. A second point of error, is dirt in the wheel slots that disturb the sensing, or the optical pickup is bad.

Posted on Jul 25, 2008

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1 Answer

I tried powering up my Meade LX2000 8" the other nignt but I couldn't. I was using a battery jumper for power and thought that maybe it wasn't fully charge so I swithed to battery power and still couldn't...


First thing to check or replace is the hand controller cable.

Does the red light come on -- on the control panel. If yes the scope is receiving power but it's not going to the hand controller. I have had two Meade cables fail. A longer one is available on

www.scopestuff.com here:
http://scopestuff.com/ss_lxdec.htm


However these scopes do have an issue with blowing out the capacitors on the power circuit board. To repair the scope must be returned to Meade, or you need to find a local electronic repair technician and be willing to remove the board yourself and take it to them.

Try the new cable first-- before you panic.


Aug 02, 2010 | Meade 8 2000mm f/10 LX90 LNT Motorized...

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Nothing seems to work on my LX90


You may need to purchase a new hand unit.
go to meade.com for purchase.

May 15, 2010 | Meade 8" LX90 LNT Schmidt Cassegrain...

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My Meade LX-50 telescope has developed an electrical problem. When I turn it on it immediately blows the fuse. I tried disconnecting the drive motors, and it still blows the fuse, so I think the problem is...


A fellow by the name of Ron Sampson can repair hand controllers and main boards on Meade telescopes. He does very good work. All you need to send him are the board(s).

You can contact him by posting a message on the Yahoo LX90 or LX200 group forums.
http://tech.groups.yahoo.com/group/lx90/

Good luck-- by the way he repaired the hand controller for our astronomy clubs 10 inch Meade LX200, at a very reasonable cost.

May 04, 2010 | Meade Optics

2 Answers

Meade 10" LX6: I need to find what color wires connect to what pins in the Encoder Junction Box connector. Appears that several may be broken and I don't have a schematic. Does anyone have the schematic...


This is a very old LX6 telescope. I have never seen a schematic on the internet. Except for these articles:
http://www.astromag.co.uk/pdfs/lx6.pdf

This person may be able to help you:
http://www.onealwebsite.com/AstroPage/Telescopes.html

and this on page 33-34
http://skywatch.brainiac.com/used/used_sct.pdf

You can also call Meade directly and see if they have one:
http://www.meade.com/support/index.html

Finally, you can post a message on the Yahoo LX90 and LX200 group and ask for help from either Dr. Clay, or Ron Sampson. Both of these folks repair Meade brand telescopes.

Feb 15, 2010 | Meade 8" LX90 LNT Schmidt Cassegrain...

1 Answer

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?

Jan 28, 2010 | Meade 8 Inch LX90 LNT Schmidt Cassegrain -...

1 Answer

Problem with alignment of Meade LX90 8" telescope


Start from scratch-

RESET the hand controller.

Calibrate motors using the same power source you will use outside.

Re-train the drives

Calibrate sensors on Polaris

Use either the 110 volt power cord, or buy a 12 volt power pack and the proper Meade 12 volt cable. (www.scopestuff.com carries the right 12 volt cable)

If your scope is NOT the LNT or GPS model you must level the tripod before you align. Go to home depot and buy the $3 small plastic two way bubble level, or the bulls-eye style bubble level.

Further trouble, I suggest going to the LX90 Yahoo group forum, and asking questions there.

Good Luck

Aug 30, 2009 | Meade 8" LX90 LNT Schmidt Cassegrain...

1 Answer

LX6 Hand controller....error message


If the hand controller on the LX6 has stopped working you have a problem since meade does not support this very old telescope. My only suggestion would be to place an ad on www.astromart.com looking for a new hand controller.

If the error message indicates a "motor fault" make sure you have a good power supply and or fresh batteries-- as low voltage will cause a motor fault error.

Later you said it was an LX90 LNT-- ?? so which scope do you actually own???

Apr 25, 2008 | Meade 8" LX90 LNT Schmidt Cassegrain...

1 Answer

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.

Apr 25, 2008 | Meade 8" LX90 LNT Schmidt Cassegrain...

1 Answer

Power


If you still have the red Led light on the scope's body, then...I ended up replacing the hand controller.
Tom Net

Mar 25, 2008 | Meade 8" LX90 LNT Schmidt Cassegrain...

2 Answers

MEADE LX90 TELESCOPE


I ended up replacing the Hand Controller with a new one.
After that it started working. I brought the new one on E-bay.
They seem to have the best prices. Forget about talking to Meade. Their innate ability to reply to your phone calls or emails just doesn't work. I will ***** buy a telescope from them again.

Aug 31, 2007 | Meade 8" LX90 LNT Schmidt Cassegrain...

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