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Thread: Meade LX250GPS repair

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    Default Meade LX250GPS repair



    My telescope is a very old LX200GPS fork mount with a ten inch LX50 OTA installed. I have had this configuration since 2007.

    The worst came in recent months. From July 2017 to February 2018 it was stored outside of a garage at an aquaintence's house. Sometime during that time the telescope was removed from its storage case and was dropped from what looks like waist level. It landed on the declination fork tine side onto a concrete and grass area. The trunnion on that side sheared right off of the three mount bolts. The force of the impact dented the OTA where the trunnion was forced to hit it.

    The person who had custody of the telscope denied damaging it, which was silly as it was obvious what happened due to the evidence. There was no way for this type of damage to happen while it was stored in its case, as the case is a very strong boat-grade plywood box built arount the original Meade foam insert used when it was manufactured.

    To repair it, the GPS side fork tine had to be removed and the three bolts on that side were removed so that the OTA could be separated from the mount. Since the bolt heads were sheared off of the OTA on the Dec motor side, they had to be tapped out of the tube by using a very small drill bit and then running a reverse tap to extract them. The OTA was then remounted to the fork and the GPS side fork tine was reattached to the base. Orthagonality was maintianed as I scratched a line across the fork times to the base when the mount was originally removed form its original LX200GPS OTA back in 2007.

    I tested the repair three days ago by running the telecope in solar mode. It operated fine. Then the following night I used the telescope to test GoTO and tracking functions. The Goto was not accurate but after synching on Jupiter it held the planet in the center of the eyepiece for over an hour.

    So it looks like all I have to do is a "train drive" operation to get the GoTo back into accuracy.

    My insurance plan is to purchcase an additional used LX200GPS mount/OTA in order to have spare parts as this telescope will likely go out of production as Meade has come out with newer models.
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    Matthew Ota
    10" Meade LX250GPS SCT, 80mm Orion ED80 Achromat, Lunt LS60THaPT H-alpha Solar Telescope

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    Default Re: Meade LX250GPS repair

    Unfortunate incident. I would make sure that the optics are sill OK by checking collimation.
    While it would not hurt to buy another mount, since the new ACF models use the same drive components as the older GPS I think parts will be available for quite awhile. I am still able to get parts for my LX200 Classic, except the old brick hand controller, although some repair parts for that are available from secondary sources.
    8"
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    Default Re: Meade LX250GPS repair

    Thankfully you were able to fix the telescope/ mount!
    It is sad to hear of situations like this but at least it is back for your use.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
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    Default Re: Meade LX250GPS repair

    Here is a follow-up to the repair.

    The tracking is perfect as I had the telescope track Jupiter over a three hour period at high magnification. It stayed centered.
    The person that repaired the telescope offered to sell me a used 8 inch LX200GPS. I will likely take him up on the offer, as the 8-inch model is easier to handle. I am 61 years old now and it is getting harder and harder to handle the 10 inch with its plywood case.

    The repair cost me $200, which was much less than what Meade would have charged. This independent repair person handles Meade repairs and he has a network of people who can handle electronic and mechanical repair of the LX200GPS series. Unfortunately for the LX200GPS user base, this person only handles repairs in the Los Angeles, Riverside and Orange counties in California.
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    Matthew Ota
    10" Meade LX250GPS SCT, 80mm Orion ED80 Achromat, Lunt LS60THaPT H-alpha Solar Telescope

 

 

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