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CGE Pro - Blinking Power Light

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#1 kimbowhoa

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Posted 20 November 2019 - 11:46 PM

Hello, I am a newbie to telescopes and astronomy. With my first attempt to assemble a Celestron CGE Pro (inherited/used and out of warranty), I have encountered an alarming issue. The power on light indicator is blinking when using Celestron's AC adapter power supply and I do not appear to be getting power to the scope since the hand control is not turning on. I have troubleshooted by examining the external ports, which seem ok to my untrained eye. I have tested a second hand control, as well as all aux ports.  I spoke to Celestron tech support, who suggested trying another AC adapter power supply, which also did not work. I realize the electronics pier could simply have a loose wire or something blown. I am not sure about opening it up yet (not sure I have the know-how, or if I could fix it if I did find the issue).  I want to understand the full range of possibilities before opting to ship it off for repair.

 

Does anyone know if the CGE Pro mount has been programmed to have the blinking light indicate a specific type of issue? Or is it more likely faulty hardware? If anyone has other ideas or suggestions, you are welcome to share.  I am not sure if I provided enough information, so ask for any clarification you may need. Thank you!

 

 

 

 



#2 freestar8n

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Posted 21 November 2019 - 02:13 AM

I don't recall ever seeing a blinking power light.  But a basic thing to do is disconnect all cables and the handcontrol and then connect power.  If the power source is good and you still get blinking it means there is something wrong in the electronics pier.  You can then open up the pier by removing the top plate and inspecting the electronics inside.

 

[But do all these disconnections and changes with power off!  Then reconnect power.]

 

But if disconnecting the handcontrol and the motor cables stops the blinking - then you can investigate those other things.

 

Frank


Edited by freestar8n, 21 November 2019 - 02:28 AM.


#3 sg6

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Posted 21 November 2019 - 06:06 AM

Unsure of the Celestrons but on the Skywatcher's the blinking power light means insufficent power for the mount. And since Synta make Skywatcher and Celestron and they are converging I would initially assume that the reason is the same = insufficent voltage/power for the scope.

 

However if Celestron Support did not say/suggest this then a little puzzled.

 

What is the specification, volts and amps, of the adaptor?

 

Can se no mention of power requirements in the manual, although it does say:

The number 9 is the fastest rate (3º per second, depending on power source).

 

Which would imply that power can be an issue and so may be checked. You usually need a 2 amp source as minimum and many go for 5amp.

 

If you have a meter check the voltage output at the end of adaptor.


Edited by sg6, 21 November 2019 - 06:17 AM.


#4 Glass Eye

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Posted 21 November 2019 - 01:49 PM

Maybe I am confused but I read “I spoke to Celestron tech support, who suggested trying another AC adapter power supply, which also did not work.”

 

then I read “However if Celestron Support did not say/suggest this then a little puzzled”

 

now I’m confused and puzzled  



#5 kimbowhoa

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Posted 23 November 2019 - 12:08 AM

Thanks for the feedback all.

 

I was using a Celestron 12 volt, 2.5 amp adaptor. Per Celestron support's recommendation, I changed to using their 12 volt, 5 amp adaptor. No success with either one. I also tried turning on power with nothing attached to the pier and it still blinks. I used a meter to check voltage - its reading was 12.25 volts. 

 

I opened the electronics pier, but I can see no visible defects or damage to the components. All the wires appear in tact. No blown/burnt pieces. I am now even more perplexed, because it seemed very likely that something was broken in the electronics pier. Are there any connection issues that would be hard to see? 

 

@Glass Eye - Celestron did not explicitly state that the blinking light indicates insufficient power supply, but all their troubleshooting and recommendations certainly imply that's what it means. 



#6 freestar8n

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Posted 23 November 2019 - 01:10 AM

Just confirming you had everything else disconnected from the pier.  No cables to the motors, no handcontrol and no st4 guide cable.  Just the power connection.

 

I would reseat all connectors inside the pier and measure the actual voltage going into the mount if possible.  If something is shorting it out you may see reduced voltage.

 

I think there should be a real time clock battery in there also.  It might be a good time to replace it.

 

Look for bugs and spider webs - which have caused problems for me in the past.  Also make sure all the electronics ports are clean.

 

I have overhauled my cge-pro so it uses a completely different servo system and the pier isn't used.  It's possible I could send you the inside components if it comes to that.  A friend is using it right now and I would need to open up the pier - but it's not out of the question.

 

Frank




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