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Re: Gemini-2 momentarily went haywire

 

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Most likely a burnt out PAL decoder for the Dec? channel ¨C you need to program it of course.

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From: [email protected] <[email protected]> On Behalf Of Michael Herman
Sent: 08 August 2021 15:24
To: [email protected]
Subject: Re: [Losmandy_users_io] Gemini-2 momentarily went haywire

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Hi gang!

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I received John's questionable G2 mini board, to test it out.??

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Symptoms:

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It boots up fine.

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It slews to an Align Bright Star target fine.

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If you press the RA diamond East West button it slews RA fine.

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If you let it run Sidereal rate it tracks fine.

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If you press the DEC diamond East West button, the DEC motor runs away!?

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This is repeatable.

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John got a new board from.the factory and his system is fixed...it is definitely a problem with this board, not the cables, motors or handset.??

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I'm unsure what to do to try and repair this board...John did try to resolder his DEC socket.??

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Any suggestions from the above clues?

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Very best,

Michael

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On Sun, Aug 8, 2021, 7:14 AM Brendan Smith <brenatlilydale@...> wrote:

Was the board repaired at Losmandy?? From experience a runaway flew is a bad motor socket solder join.?


The ICs used are mostly capable of ?minus 20C.? All ICs were chosen to suit this wide temp range spec. Very much doubt it¡¯s that.?


Is I¡¯d all good now ? Has it been repaired ¡­if not¡­.it¡¯ll come back to bite when you least expect?
--
Brendan
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