[amsat-bb] G-5500 az rotor failure

[k.swaggart at charter.net]

This morning I found my G-5500 will not move left or right. Not even a
wiggle. Took some measurements and the wiring appears to be intact but I
don't understand the 40 Vac readings when the rotor is connected to the
control box. Here are my readings taken at the control box end of the
wiring:

 

Rotor connected to control box:

Common (pin 6) to Left (pin 4)  Press Left: 28 Vac  Right: 40 Vac

Common (pin 6) to Right (pin 5) Press Left: 40 Vac  Right: 28 Vac

 

Rotor disconnected. Measuring control box terminals:

Pin 6 to 4  Press Left: 29.5 Vac  Press right: 0

Pin 6 to 5 Press Left: 0  Press Right: 29.5 Vac

 

Measuring rotor cable at control box, disconnected from box:

6 (brown) to 4 (blue) 5.3 Ohms

6 (brown) to 5 (orange) 5.3 Ohms

4 (blue) to 5 (orange) 8.9 Ohms

 

Any suggestions before I pull the rotor off the mast?

 

73,

Ken, W7KKE