[amsat-bb] Re: G5500 Azimuth issue

Tue Jul 26 14:59:43 PDT 2011


Various things to try.  .

Check the connections at the screw connectors on the back of the control
unit.  Sometimes they work loose.

If at all possible, swap the connectors at the rotators.  The circuitry is
identical in the G-5500.  If the azimuth still doesn't move when you
activate the elevation controls, it is a rotator problem.  

If it does move after switching the connectors, the problem is in the
azimuth wiring, or the control box.  Disconnect wires 4,5,6 and measure the
DC continuity to the rotator.  You should see a couple of ohms 4-6 and 5-6,
and about twice that 4-5.  If the continuity is bad, it is a broken wire or
connector.  It is unlikely, but possible, that both limit switches have
failed.  If the continuity checks good, then look at the voltage from the
control box.  Make certain you see AC voltage between 4-6 and 5-6 when you
close the appropriate switch.

If everything checks out, it is probably the phase shift capacitor inside
the motor.  Let us know what you find.


-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Peter Portanova
Sent: Tuesday, July 26, 2011 4:27 PM
To: AMSAT-BB at amsat.org
Subject: [amsat-bb] Re: G5500 Azimuth issue


I have a G-5500 and I cannot move the azimuth controls, I also have the LVB 
tracker and when I try to manually change CW or CCW on the main unit or LVB 
it does not respond, the elevation is fine.   I would appreciate any ideas 
on where I should begin to determine which part has failed, thank you.

73's Pete

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