Question about Meade LX200GPS 10 in. Telescope

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10" lx200 classic EMC

Hi I need the dec motor plug-in socket that bolts to the arm of the scope where the coiled wires attach, mine only works when you wiggle it. Appears to be worn out. How/where can I get one? thanks. jmakoutz@network2010.net

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  • james makoutz
    james makoutz Aug 11, 2008

    I'm pretty sure its not the cable. The wires in the socket look worn out. The telescope was made in 92. Thanks for the help!!

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You will need a socket called an RJ45 (8P8C), which has 8 contacts. Many are available as telephone line (three phone line) extension connectors. This is also like an ethernet Cat5 or Cat6 (8 wire) computer network cable connector You can get these at Radio Shack or Staples or similar office supply. You can take apart the $5-9 connector and use half. Either that, or you will have to go shopping at an electronics store like Fry's or on line (Allied, Digitech or Mouser). But there you may have a minimum order charge.
But are you sure it is the socket and not the cable? Can you swap the cable end for end or buy a new one?
"Recently there have been complaints about declination drive intermittent electrical problems. Many do not realize that there is a second plug on the inside of the fork where the declination cable plugs in. This plug should also be worked from time to time as well and cleaned." from MAPUG

Posted on Aug 11, 2008

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I just purchased a used Meade LX200 10" scope by mail. When I opened the box I found that the battery compartments AND the sheathing on the inside of both arms are missing. Have I been ripped off?


I assume you mean by sheathing the cabling to the RA and DEC motors and by battery compartment the control panel. If the seller stated that the scope was working, indeed you got ripped off. If by ratings you mean ebay I would contact them about a return and refund. If you got a great price, all is not lost since there is an upgrade to an autostar which will get you back in working order (but you need the RA and DEC motors). Autostar upgrade is about $ 520 but you will still need a 12V power supply. George Dudash 760 383 2741 sells these kits and can probably get the other parts you need to get going. I'm guessing this may cost around $ 800 total from what you say. If you paid more than $ 1000 for that scope I'm afraid you were ripped.

Mar 01, 2015 | Meade 10" LX200GPS Schmidt-Cassegrain...

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I have an older meade LX2000 EMC 10


The main problems encountered with the mechanics of the telescope centre around the mechanical swarf, grease compound, the liberal use of grease and the quality of machining of the main DEC and RA gears.
1. Remove the motors from the telescope. Be careful when removing either motor as there is a compression spring between the motor mounting frame and the worm shaft assembly.
The RA motor is located under the telescope body, removing the 4 screws and 2 Allen bolts will allow the bottom cover to be removed, thereby allowing access the the 2 Allen bolts holding the motor in place. Unplug the motor from the main PCB before removal.
The DEC motor is in the the fork arm containing the clutch and fine DEC adjustment control. (Never to be used with power applied to the scope). Remove the 3 small Allen screws holding the plastic cover plate in place and the DEC clutch knob to allow access to the motor. Remove the RJ45 connector located inside the telescope fork arm. Then remove the motor by unscrewing the 2 Allen bolts holding the motor in place.
2. Remove all grease from the motor worms, especially around the RA motor's magnetic pulse detector and the permanent magnet built into the worm shaft.
3. Remove all grease from the main DEC and RA gears, making sure to clean into the gear teeth.
4. Lightly re-grease with a Molybdenum Disulphide based grease (Castrol MS3 is great for this application if you can get it)
5. Assemble in reverse order. But before doing so, carry out the electrical adjustment above then, (a) relocate the the RA and DEC control PCB's in the vertical plane thereby gaining access to their respective backlash Allen screws. Adjust for 20thou max clearance when in final position. Note:- the DEC adjustment screw has to be replaced for a longer unit complete with a thin bolthead as this adjustment has to be carried out with a spanner....there is no room for an Allen key adjustment here.
6. A drop of Loctite must be applied after adjustment.
7. The final part of the process is to run in the gearing. Apply 12 volts to the motor wires, either at their respective plugs or to the motor direct. Allow to run for 2 to 3 hours in each direction by reversing the battery polarity to bed the teeth engagement. Remember to release the clutches.

Dec 28, 2011 | Telescopes

1 Answer

10" LX200 runaway motor, right ascension.Mead


The very first thing to try is new cables. Including the DEC cable. If this does not repair it then it has an internal circuit board issue.

Buy new cables first--

www.scopestuff.com sells them. Call them and order everything new.

Also a low power supply can also cause this-- and would be the second thing I would check. You are using a separate 12volt power pack -- correct?

www.telescopeman.org
www.telescopeman.info
www.telescopeman.us

Jul 24, 2011 | Meade Telescopes

1 Answer

10"LX200 EMC that will not


This model LX200 classic has weak capacitors that blow out with age. Go to the Yahoo LX200 group-- post a message with the problem for "Ron Sampson" he can repair the board if it is broken. Also Dr. Clay and Andrew also post to this web site--- they know a lot about LX200 electronics.

www.telescopeman.org
www.telescopeman.us
www.telescopeman.info

Jul 14, 2011 | Meade LX200GPS 10 in. Telescope

1 Answer

I have a 1998 Meade LX200 classic that blew out fuses and capacitor(s) when I recently started it up. I have had a local TV repair shop replace all of the capacitors and it now has a runaway RA drive when...


Something else is wrong. The first thing to try is a new DEC cable and a new hand controller cable for the runaway slew, and hand controller issue.

If new cables do not fix the problem then contact Ron Sampson on the Yahoo LX200 group-- just post a message for him there. He can repair Meade electronics at a reasonable cost if you send him the boards.

He can also repair the hand controller including the internal ribbon cable and the LCD screen.

Try the new cables first- check this web site for a wiring diagram:
http://www.mapug-astronomy.net/

or contact www.scopestuff.com they may have one already made-up.

Oct 23, 2010 | Meade LX200GPS Telescope

1 Answer

Bolt holding dec drive motor on 16 loosens.


You have a LARGE Meade telescope. This should be an easy fix if you can disassemble the fork arm and get inside.

First I would contact Meade customer service to see if they have a manual that shows disassemble instructions. If not I would join the Yahoo LX200 forum and look for help there with an owner of the 16 inch model.

http://www.meade.com/support/index.html

Just search in Yahoo Groups for the LX200 forum.

On smaller scopes the DEC motor is held on by two spring loaded bolts, probably one has become loose?

Nov 04, 2009 | Meade LX200GPS Telescope

2 Answers

Meade LX200 drive system keeps spinning


The older Lx200's go into tracking mode when turned on if they are not recieving a signal from the handbox. It does this on purpose so you can use the telescope without the handbox and still track sky objects. If it is still doing this with the handbox plugged in then you have a bad chip in the electronics and Meade is notorious for not having parts for their older telescopes. Don't send it in to them to repair. It will cost you a fortune to mail back and forth and they still can't repair most electronic problems with their older scopes(from my personal experience).

Apr 21, 2009 | Meade LX200GPS Telescope

1 Answer

Backwards?


Check the Autostar controller for a stuck direction key.

Jul 02, 2008 | Meade LX200GPS Telescope

3 Answers

Meade LX200 10" SC Telescope


You have a standard lx200 problem. If you transported your scope a lot with the drives "locked" it damages the RA and DEC drives. If you keep using it, the motors burn out and start drawing too much current. This sometimes blows the motor driver chips on the motherboard which are getting very rare.

The burned out tantalum caps can be replaced with better aluminum electrolytics very cheaply. If the ones in your Autostar burned out, they often burn up the ribbon cable. Also, they often take out U11, a 74LS14 chip on the motherboard. Also a cheap repair. You should take the Autostar apart. If they are burned up, it will be obvious. If your ribbon cable survived, you should replace the caps with aluminum electrolytics. I believe they are 6.8 uf.

So, if you can work an ohmmeter, measure the resistance of the two drive motors with the plugs unplugged. If it is about 14 ohms they are ok. If they are about 3 or 4 ohms, they are toast. Check the worm drives for end play. If there is just a little, you can adjust them. The battery jack on the control panel often breaks the solder joints on the board, causing one of the problems you describe. You can check that and replace/resolder as necessary. The on/off switch often fails and gets intermittent. These are also cheap and can be replaced. I don't repair these for a living but I repair a few of them for friends in the club. These are pretty common problems.

Feb 27, 2008 | Telescopes

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