Question about Meade LX200GPS Telescope

3 Answers

Problems with my LX200 Classic

Hi, I have a serious problem with my telescope Meade LX200 Classic.
I would ask you some opinion about my problem.
Today, when I turn on my LX200 the C1 and maybe C2 capacitors on Power Panel board are burning.
I don't really know the reason why.
I hope that the problem is only on C1 and C2 capacitors, but I'm not sure.
Looking at your Power Panel schematic on http://www.ccdguy.com/lx200_images/PowerPanelSch.pdf it seems that the C1 and C2 capacitors are supplied from a +12V that arrives from the Keypad.
It is possible that the real problem is the Keypad?

Sorry for my english.

I hope that yuo can help me.

Regards
Nico

Posted by on

  • henryg200 Jun 26, 2008

    Hi.

    I had the same problem yesterday.

    In detail the following occured: after not using my meade lx200 10 inch classic for three years I prepared to go out for a night of observing and planned with plenty of light to check out my system before loading everything in the car. I plugged the AC/DC wall adapter that came with the scope into the extension cable with fuse into the base unit. A saw the current meter give a few red lines, heard a slight pop and the entire system went dead. The fuse in the cord didn't blow. The slow blow fuse behind the control panel did blow. I replaced the fuse with an identical slow blow and tried again. Nothing came on this time and both the fuse behind the control panel and the one in the cord blew. I did not replace the screws of the control panel when I made the second attempt and I visually saw the fuse burn without any other signs of electronic damage (ie smoke).

    The next day I replaced all fuses and bought the scope to my car and used the cigarette lighter 12V-18V adapter for power. Blew the fuse in the control panel again. I removed the power panel disconnected the jumper, left the DEC drive cord intact and the computer module connected. The control panel lights up just fine and the current meter gives two red bars. The computer module says MEAD but it never allows me to go beyond that point.

    I check again inside on the AC/DC wall adapter. With everything attached (DEC, hand module and mother board jumper). This time all hell breaks loose. I hear a pop, smell smoke, see fire from underneath the control/power panel. I turn the panel over and it is clear that capacitor C1 is burned with some damage to capacitor C2 as well.

    I then checked the output voltage on the AC/DC wall adapter and it is running 20Volts. I should have done this initially but I was stupid.

    So now I have a control panel with two damaged capacitors which I could easily replace (I'm not an expert with electronics but I know people that can help me remove and replace both C1 and C2). My question though is weather or not it's worth it? Does it make sense that the initial 20V surge could damage C1 and/or C2 but not totally kill them which occurred on the second attempt using the AC/DC adapter. Also, can someone who knows more about circuit design tell me or at elast theorize exactly what the voltage regulator that C1 and C2 are connected too might be doing and/or if blowing them would lead you to believe that my mother board is blown too?

    I'm just asking for advice before I spend months and a lot of money playing tech-service-tag with the people from Meade.

    Thanks in advance for any advice.

    L


  • davewalker Nov 16, 2008

    Yes, I have the same problem. After not using my LX200 for about 3 years, I plugged it in and when i turned the switch on the control panel on there was an immediate puff of smoke and a terrible smell. It looks to me like both C1 and C2 capacitors have been incinerated. Any insight or help would be greatly appreciated.

    davewalker@interfacevisuals.com

×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Same Here

Posted on Feb 14, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,027 Answers

C1 and C2 are on the input of a voltage regulator. The fact that they burn, could mean that their voltage rating has been exceeded (check the voltage across them), or that age has caused their failure. The classic uses about 18 volts into the power panel - see that it is not higher than that. The handpad would not be a cause for this to happen as it is not the source of the power. Replace the caps with similar ones, but with higher voltage rating - 50v is fine. But check your power supply first!

Posted on May 22, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Slack deck movement

Posted on Mar 22, 2010

1 Suggested Answer

  • 1027 Answers

SOURCE: Problems with my LX200 Classic version

C1 and C2 are on the input of a voltage regulator. The fact that they burn, could mean that their voltage rating has been exceeded (check the voltage across them), or that age has caused their failure. The classic uses about 18 volts into the power panel - see that it is not higher than that. The handpad would not be a cause for this to happen as it is not the source of the power. Replace the caps with similar ones, but with higher voltage rating - 50v is fine. But check your power supply first!

Posted on May 22, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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 an LX200 12",the main circuit board (on base of scope) is blown.Where can I get a new one?


Usually these must come from Meade-- call their customer service department here:

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

Also you can contact Ron Sampson on the LX200 Yahoo group and he will repair the board if you can remove it and send it to him.

Oct 14, 2010 | Meade LX200GPS Telescope

1 Answer

Level a Meade telescope.


You did not say what model, or if it was on a wedge or not???

Model name and number would also help.

LX200 Classic, LX50, LX10, LX90, ??????? Post more information.

Feb 04, 2010 | Meade Telescopes

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

1 Answer

ASCENSION DRIVE WON'T STOP TURNING.


If you will post this question on the Yahoo LX200 forum group the experts there may be able to diagnose this problem.

Many folks there with the same telescope.

Jul 08, 2009 | Meade Telescopes

1 Answer

Software hardware compatibility


Just call Meade and ask their tech support--

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

Jun 19, 2009 | Meade LX200 8 in. f10 SCT (cat08102064)...

1 Answer

Capacitor upgrade for classic lx200


I don't know why these are burning out but if you stayed with the same type of capacitor with an increased voltage rating it will most likely help.

Apr 08, 2009 | Meade LX200GPS Telescope

1 Answer

8in. classic lx200 electrical problem


These guys will repair the board-- maybe call them and see where to get the part if you are going to try and do it yourself--

http://www.astronomy-shoppe.com/

Apr 06, 2009 | Meade LX200 8 in. f10 SCT (cat08102064)...

1 Answer

Problems with my LX200 Classic version


C1 and C2 are on the input of a voltage regulator. The fact that they burn, could mean that their voltage rating has been exceeded (check the voltage across them), or that age has caused their failure. The classic uses about 18 volts into the power panel - see that it is not higher than that. The handpad would not be a cause for this to happen as it is not the source of the power. Replace the caps with similar ones, but with higher voltage rating - 50v is fine. But check your power supply first!

May 04, 2008 | Meade LX200GPS 10 in. Telescope

1 Answer

Cannot power up my Meade LX200


Check to make sure there are no bad connections under the swith itself. My Celestron C8 mount has similar problems and if I mess with the switch it will power up.

Jan 31, 2008 | Meade Telescope

Not finding what you are looking for?
Meade LX200GPS Telescope Logo

Related Topics:

1,457 people viewed this question

Ask a Question

Usually answered in minutes!

Top Meade Telescopes Experts

Joe Lalumia aka...
Joe Lalumia aka...

Level 3 Expert

3185 Answers

Geoff

Level 3 Expert

413 Answers

Geoffrey White
Geoffrey White

Level 3 Expert

3961 Answers

Are you a Meade Telescope Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...