[amsat-bb] Re: Yaesu 5500 rotor problem

Dave Guimont dguimon1 at san.rr.com
Tue Jul 19 18:19:40 PDT 2011

Hi Jeff,

I had an indication problem on my 5500 many years ago....

I opened the rotor and discovered that there was a cold solder joint 
on of the pot contacts...a proper solder joint solved the 
problem...an easy one to check first......

>  I'm having a problem with my 5500 after a thunderstorm. What is happening
>is that the rotor works manually, but doesn't display az and el information
>on the control box. Also when I try to use computer control it goes all the
>way to stop in both azimuth and elevation. I'm thinking this might be in the
>control box, as both az and el are doing the same thing, the control box
>being the single point of failure. Did anyone ever have this problem? How
>can I diagnosis what chip might be at fault without a schematic. I vaguely
>remember having this same problem after a close lightning strike with my
>prior az el Yaesu box about 14 years ago but don't remember what chip I
>swapped out, or how I determined which one was at fault. This getting old
>thing really sucks. Any help would be appreciated.
>73 Jeff kb2m
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            73, Dave, WB6LLO
                dguimon1 at san.rr.com

                    Disagree: I learn....

               Pulling for P3E... 

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