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Old 04-08-2019, 12:36 PM
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chrisp9au (Chris)
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Location: Clifton Springs, Victoria
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Help! Nexstar SLT firmware update issues

I have successfully updated the hand control on my Nexstar SLT mount, from V 4.17 to V 4.22
It updated without a hitch, very happy, so happy I decided to update the Motor Control.
If only I hadn't!

I tried updating from V 5.14 to V 5.18
MCupdate reports "An Error occurred Programming Data at Address: 709" and recommended restarting the programming.
I have restarted it many times, getting errors at a number of different addresses.
After an hour I cancelled out and tried to re-install the old version V 5.14.
Same problems.Now my hand control cannot communicate with the mount!
Hand control says "No Response 16" which is the azimuth motor.




Has anybody experienced this? More importantly has anybody recovered from this?
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Old 21-08-2019, 09:45 AM
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chrisp9au (Chris)
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Happy to say that folk over on Cloudy Nights helped me to resolve this issue.
Particularly Michael Swanson who runs the Nexstar resource site, https://www.nexstarsite.com/
I spent $30 on ebay getting an old desktop PC with a serial port, to avoid using a USB adapter.
Plugged in the SLT mount and ran the MCupdate program with no hassles at all.
Very happy with the outcome, and amazed at how fast Windows 7 operated!
Have also installed a Celestron Skyportal Wifi unit, and am now running the scope from Sky Safari.

Last edited by chrisp9au; 21-08-2019 at 09:46 AM. Reason: spelling!
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