[amsat-bb] Yaesu 5500 rotor problem

Jeff KB2M kb2m at comcast.net
Tue Jul 19 13:54:10 PDT 2011

 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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