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Meade ETX90AT Maksutov Telescope with UHTC (cat35140321) - Page 4 Questions & Answers
What IC's uses the control of the focus motors
I'm assuming you will change these ICs yourself and that's why you're asking. If you have access to the circuit board, then you should be able to find some numbers on the IC which you think is blown. If you can pull that IC and look at it's underside you may be able to find a number you can search on the internet for. Or you can find a number on the circuit board itself and maybe find the company that made that board and contact them to find out the IC you need. You can probably find an IC match as long as the pins are in the same order and the voltages are the same. Good luck!
10/14/2014 7:07:27 PM •
Meade Optics
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Answered
on Oct 14, 2014
Need an owners manual for a Meade 144AZ TELESTAR reflector telescope
Try going in on google or what ever you use and type your model and part number you will find dealers for device and parts...Also if you know hiw go into EBAY and just type your model in the search window ..it will give you everything on EBAY protaining to your model.. Good luck..
10/5/2014 7:28:37 PM •
Meade Optics
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Answered
on Oct 05, 2014
Can't focus my telescope
If there is nothing on the objective lenses or eyepiece lenses then it most likely needs collimation. This is where you adjust the secondary mirror while viewing an out of focus star. You need stable sky conditions to do this.
There are most likely three small screws at the front of the telescope and these are what you use to adjust it. As one screw is loosened then another is tightened. Do this in very small increments. If you have your manual it should outline how to perform this. If not go to this web site: http://www.astrosurf.com/legault/collim.html. It will show examples of how objects look both in and out of collimation. There is a section further down the page for SCTs.
A very handy tool for this is to replace your screws with Bob's Knobs (http://www.bobsknobs.com/) . These replace the screws and allow you to adjust it by hand instead of a screwdriver.
The other focusing problem I've experience with my Celestron SCT is to have the focus knob loosen up and then slip as I turned it so that I could never focus with it.
Good luck and clear skies!
-jodair
9/4/2014 4:24:43 AM •
Meade Optics
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Answered
on Sep 04, 2014
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