Sea Tel 4012 GX KU-BAND Technical Manual page 9

Table of Contents
20.7.5. Verify Encoder Feedback: ................................................................................................................................................ 20-18
20.8. C /T - EL / CL M
HECK EST
20.8.1. Theory of Operation: .......................................................................................................................................................... 20-19
20.8.2. Verify Initialization: ............................................................................................................................................................. 20-19
20.8.3. MDE Status LEDs: ................................................................................................................................................................ 20-19
20.8.4. Test the Motor: ..................................................................................................................................................................... 20-19
20.8.5. Verify Motor Brake Release ............................................................................................................................................ 20-20
20.9. C /T - P
HECK EST
20.9.1. Servo Limit (CL, LV and AZ) ............................................................................................................................................. 20-20
20.9.2. Stability Limit ......................................................................................................................................................................... 20-20
20.9.3. AZ Reference Error ............................................................................................................................................................. 20-21
20.10. C /T - H
HECK EST
20.10.1. Theory of Operation: .......................................................................................................................................................... 20-21
20.10.2. Troubleshooting: .................................................................................................................................................................. 20-21
20.11. C /T - MDE - ............................................................................................................................................................................ 20-21
HECK EST
20.11.1. Theory of Operation: .......................................................................................................................................................... 20-21
20.11.2. Verify Initialization: ............................................................................................................................................................. 20-21
20.11.3. MDE Status LEDs: ................................................................................................................................................................ 20-22
20.12. C /T - P
HECK EST
20.12.1. Theory of Operation: .......................................................................................................................................................... 20-22
20.12.2. Verify the Range of Motion of the Feed Assembly (4012) ............................................................................ 20-23
20.12.3. Measure Polarity Motor Voltage: ................................................................................................................................ 20-25
20.13. C /T - P
HECK EST
20.13.1. Theory of Operation: .......................................................................................................................................................... 20-25
20.13.2. Check the Pol Pot Calibration: ...................................................................................................................................... 20-26
20.13.3. Verify the Resistance of the Pol Pot:.......................................................................................................................... 20-27
20.13.4. Calibrate the Pol Pot .......................................................................................................................................................... 20-28
20.14. C /T - P
HECK EST
20.14.1. Theory of Operation: .......................................................................................................................................................... 20-28
20.14.2. Verify Initialization: ............................................................................................................................................................. 20-28
20.14.3. Verify the Range of Motion of the Feed Assembly (4012) ............................................................................ 20-29
21. MAINTENANCE ......................................................................................................................................................................................... 21-1
21.1. W I
ARRANTY NFORMATION
21.2. T L
ORQUE AND OCTITE
21.3. G M
ENERAL AINTENANCE
21.3.1. Balancing the Antenna ......................................................................................................................................................... 21-2
21.3.2. Fine Balance and Monitoring Motor Drive Torque ............................................................................................... 21-3
21.4. R C
EPLACING OMPONENTS
21.4.1. Replace Wire Rope Isolators............................................................................................................................................. 21-4
21.4.2. Replacing the Rubber Bumpers ....................................................................................................................................... 21-7
21.4.3. Replacing the Pneumatic Damper ................................................................................................................................. 21-7
21.4.4. Replacing the Flow Control Valves ............................................................................................................................. 21-10
21.4.5. Replacing the Chain Tensioner Spring ..................................................................................................................... 21-12
21.4.6. Replacing the Azimuth Motor ....................................................................................................................................... 21-12
21.4.7. Replacing the EL Motor: ................................................................................................................................................... 21-16
21.4.8. Replacing Elevation Drive Belt ...................................................................................................................................... 21-17
21.4.9. Replacing the CL Motor: ................................................................................................................................................... 21-19
21.4.10. Replacing Cross-Level Drive Belt ................................................................................................................................. 21-21
Sea Tel - Proprietary. Do Not Copy, Distribute or Disclose
............................................................................................................................................................ 20-19
OTOR
E T . ............................................................................................................................................. 20-20
EDESTAL RROR YPES
F S - ................................................................................................................................................ 20-21
OME LAG ENSOR
M ................................................................................................................................................................... 20-22
OL OTOR
P ......................................................................................................................................................................... 20-25
OL OT
E ................................................................................................................................................................ 20-28
OL NCODER
........................................................................................................................................................................ 21-1
S ................................................................................................................................................. 21-2
PECIFICATIONS
........................................................................................................................................................................... 21-2
......................................................................................................................................................................... 21-4
4012 GX Dealer Technical Manual
Document. No. 136879 Revision B
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