Question about Meade Optics

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I am looking for a schematic for a Meade ETX90 Astro telescope mount drive circuit board. The board is #15-1200-00 and uses 3 AA batteries to power the drive motor .

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  • Meade Master
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Request it from Meade.

Posted on Sep 03, 2018

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6 Suggested Answers

6ya6ya

6ya staff

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SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 1027 Answers

SOURCE: meade LX200GPS telescope

The front panel for the telescope has an internal fuse. Remove the screws and look at the circuit board for a fuse. Replace with the same type and rating. The telescope has a diode with the fuse that gives some protection against reverse polarity, and the telescope should function on this fix.

Posted on May 22, 2008

Anonymous

  • 1 Answer

SOURCE: problem with lx200gps meade telescope

It might be a voltage or electrical current problem. Make sure your DC power supply is between 12 and 14 volts. Make sure all electrical connections are tight. Where the power cord plugs into the connection panel, make sure the center pin on the panel fits tightly into the plug. It is a Radio Shack type "N" plug. If tou still have a problem, remove the bottom plate from the scope base and make sure all the connectors are properly seated on the circuit board. Check the connector on the end where the black and red wires are. That is a main power connector and if it is too loose it will not conduct enough current. There can be enough voltage drop that the drive motors won't operate, or they will and the scope will slew uncontrollaby. Be careful handling the wires so that you don't damage them. Good luck, Dave

Posted on Sep 26, 2008

SOURCE: How to build homemade astro telescope?

You can build a Dobsonian style telescope -- look here-
http://pages.sbcglobal.net/raycash/manualv2.pdf

Building a refractor would be lots more expensive! for the optics-- however you can buy this small refractor being sold now for the International Year of Astronomy 2009 -- and see how they are constructed--

https://www.galileoscope.org/gs/

Posted on May 17, 2009

Experi

  • 20 Answers

SOURCE: Computer control and pointing with NorthStar Goto & Autostar

Your reseller is correct. The wire (Meade cable #505) goes from an RS232 serial port on PC to a 4pin RJ plug. This plugs into the 2nd socket on the bottom of an Autostar 497 handset, the other socket being used for the curly lead to the telescope. So it goes PC to Autostar to telescope.

A common error is to try plugging the serial wire into an "AUX" ort on the telescope control panel - same connector. Not only does this not work, it can cause a lot of damage.

Wired like this you can control the scope from Meade's Autostar Suite (or many other planetarium softwares). You can also update the Autostar software to the latest 2009 version.

What else can go wrong? Well, many people want to control from a laptop, and modern ones don't have RS232 serial ports. Then you need a USB-to-serial convertor dongle, which effectively add a serial port to a laptop. But they often give it a very high port number (eg COM17) that the planetarium software does not find. Use Control Panel to reset the USB-serial-port to COM 1, 2, 3 or 4 and all should be well. But it can be a right fiddle!

Posted on Aug 15, 2009

Anonymous

  • 1 Answer

SOURCE: I have a meade 4501 telescope. It has an

Hi there.
I have a meade 4501 telescope and it comes with a battery pack which contains 19 x 1.5v AA batteries. I also use my 12 volt adaptor which works fine and has never needed more power.Hope this helps.

Posted on Sep 04, 2009

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Sometimes you can find these for sale at these web sites--

Sometimes--

http://shop.telescope-warehouse.com/

and here:
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You might try calling Meade directly:
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You will not find a schematic anywhere on the internet. You must call Meade directly at their customer service phone here:

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

They may furnish you with a schematic-- BUT most likely will want you to return the scope. You can also locate a local electronics technician (someone who repairs TVs or VCRs) and have them replace the capacitor.

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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.


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The Meade ETX90 does NOT have small lens! It has a large curved lens in the front. and a holder for the eyepiece in the back (top). There is also a camera port in the back, and a flip lever that sends the light either straight back to a camera, or UP to the eyepiece holder.

There is an INTERNAL secondary mirror mounted on the back of the front large lens. If this fell off INSIDE, you will need to remove the front lens to fix it. NOT an easy fix as the optical alignment can get messed up when you do this.

Here is the manual for an ETX90, you should read it completely.

http://www.meade.com/manuals/TelescopeManuals/ETXtelescopes/ETX-90_105_125EC_man.pdf

and for the hand controller:
http://www.meade.com/support/etxautofaq.html

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Ik wil graag een Nederlandse handleiding voor de Meade ETX 90


Meade has all of their ENGLISH language manuals on this web site.
http://www.meade.com/manuals/index.html

Here is your telescope- ETX90
http://www.meade.com/manuals/TelescopeManuals/ETXtelescopes/ETX-90%20w-autostar%20man.pdf

A dealer in the Nederland may have one in your language. Locate a nearby telescope shop.

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Not getting power to the drive motors


I own an ETX90. Is the power light on the computer control panel ON?

If yes then the board is probably OK. If NO- either the power cable is bad or the board is blown.

Try a new power cable first, and or install batteries and see if that works. If the light is on you could have a loose wire inside. Re-seat the connections inside the base. Read these instructions:

http://www.weasner.com/etx/techtips/etxtu.htm

If it still does not work you can send it back to Meade for repairs. Call them about that here:
http://www.meade.com/support/index.html

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Meade "might" sell you the replacement part. But most likely they will want you to return the scope for repairs.

Call them:

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

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Here is the ETX Tuneup page:

http://weasner.com/etx/techtips/etxtu.htm

and the Mighty ETX web site tech page:

http://www.weasner.com/etx/techtips.html

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See if a manual is listed on the Meade site Here:
http://www.meade.com/manuals/index.html


That shows the power supply voltage.

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