I'm a new member to this forum but a long-time user and collector of Meade products.
I purchased a 12" LX600 in July 2014 and, up to a month ago, the scope worked wonderfully well for both visual and photographic work. Calibrations were easy and straightforward, the GOTO function was on-target and tracking was spot-on. Not any more!
A few weeks ago the tracking in RA went haywire for no apparent reason. It appeared to be related to the RA PEC but mulitple PEC traing sessions have been fruitless. The scope is properly polar aligned (One-Star Polar Alignment), has been correctly adjusted for polar drift, has received several successful RA PEC training sessions and undergoes a complete Automatic Rate Calibration prior to each nightly session. However, even with all these parameters correctly established, it no longer tracks properly in RA despite many futile attempts to manually adjust the RA tracking speed.
Related to this issue, and probably a root cause of the problem, is the loss of the RA Drive Training function. When attempting to train the RA drive on a terrestrial object, it works properly in one direction but does not respond in the other RA direction. When it slews away from the selected terrestrial object and slowly tracks back, it fails to stop when the object is centered and ENTER is pressed. It does not respond as it should and cannot be stopped except by pressing MODE, which then freezes the system completely. At this point there is no response to any hand control command and the scope must be shut off manually, resulting in the loss of all data (ARC, Park Position and PEC Training). The DEC Train function works correctly.
Has anyone experienced similar failures with Drive Training and RA tracking? I cannot be sure if this is a hardware problem (Starlock, gears, motor drive, etc.) or software associated with the hand controller, although I suspect a software problem with the Autostar II controller.
Thanks for any suggestions you might have.
Clear skies for all.