Sea Tel 9711QOR-86, Installation And Operation Manual, Page: 161 / 243

9711QOR-86 C & Ku-Band TXRX Maintenance
19-19
19.9.4. Circular Feed Drive Test Procedure:
Use ProgTerm to enter the commands below.
1. Disconnect the “Rotary Joint” coax (SMA) from the PCU (this prevents auto-pol from overriding your
drive commands).
2. Enter “h0350”, and verify the feed moves toward the LHCP marker. Entering it again should result in
the feed moving closer to the marker.
3. Manually depress the LHCP limit switch, and enter the same command again. The motor should not
move.
4. Continue to depress the LHCP limit switch, and enter “h0800”, and verify the feed moves toward the
RHCP marker. (If it does not drive, test the diode on the Motor Termination PCB to ascertain if it has
failed or is installed backwards).
5. Enter “h0800”, and verify the feed moves toward the RHCP marker. Entering it again should result in
the feed moving closer to the marker.
6. Manually depress the RHCP limit switch, and enter the same command again. The motor should not
move.
7. Continue to depress the RHCP limit switch, and enter “h0350”, and verify the feed moves toward the
LHCP marker. (If it does not drive, test the diode on the Motor Termination PCB to ascertain if it has
failed or is installed backwards).
8. Connect the “Rotary Joint” coax (SMA) to the PCU (so that auto-pol can target polarization).
If the motor does not drive, assure that the feed is not at the LHCP or RHCP limit (limit switch engaged).
Remove the motor from the circular section by removing the mounting plate screws and disengage the drive
sprocket. Listen to the motor and observe the drive sprocket. If the motor is driving (internally) but the drive
sprocket is not turning or the motor is not driving, the motor may be failed.
Refer to drawing 134868 page 2 wiring diagram to check continuity of wiring connections from the Circular
Section Motor Termination PCB through the limit switch(es) to the motor and pot.
Isolate & replace the faulty component.
Reinstall the motor and engage the drive sprocket.
Retest steps 1-6 above to verify that drive capability is restored. The feed assembly does not need to be re-
calibrated as long as the potentiometer has not been replaced, disengaged or removed from its mounting
location.
19.9.5. Linear Feed Drive Test Procedure:
Use ProgTerm to enter the commands below.
1. Disconnect the “Rotary Joint” coax (SMA) from the PCU (this prevents auto-pol from overriding your
drive commands).
2. Enter “g0030”, and verify the feed moves toward the CCW marker. Entering it again should result in
the feed moving closer to the marker.
3. Manually depress the CCW limit switch, and enter the same command again. The motor should not
move.
4. Continue to depress the CCW limit switch, and enter “g0210”, and verify the feed moves toward the
CW marker. (If it does not drive, test the diode on the Motor Termination PCB to ascertain if it has
failed or is installed backwards).