Nautel VS1, Руководство по устранению неисправностей

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VS1 Troubleshooting Manual Responding to alarms
Issue 10.0 2018-10-29 Page 1-37
10. Install FET clamps (Nautel Part # 211-1215) on Q1 and Q2, ensuring they are parallel to the
heat sink. Loosely secure each FET (Q1 and Q2) with two M3 screws, two Belleville washers
[use two new washers (Nautel Part # HAJ59) provided with the replacement kit, if
applicable, otherwise re-use the washers removed in
Step 3 ; note orientation] and two flat
washers (see Figure 1.4 on page 1-38 ). Turn screws until they barely put pressure on the
clamp.
11. Using a torque screwdriver, alternate tightening the left and right screws on each FET clamp,
a quarter turn at a time, until 5 inch-pounds (0.56 Newton-meters) of torque has been
applied.
12. Tighten the four M3 PWB screws. Use a torque screwdriver to tighten RT1’s securing screw
to 9 inch pounds (1.0 Newton-meters).
13. Solder the wires removed in Step 2 . If necessary, refer to Section 4 of this manual for wiring
details for A5.
14. Re-install the transmitter’s bottom cover.
15. Remove the transmitter’s top cover. Check the continuity across fuse F1 on the PS
distribution PWB (A2). If the resistance is greater than 1

replace fuse F1 (Nautel Part #
FA57, located in the ancillary kit) and re-install the transmitter’s top cover.
16. Re-install the transmitter in its cabinet and reconnect all cables. Enable ac power.
17. Perform the VS1 IPA Output Power Configuration procedure in Information Sheet
IS16007, which is available in the NUG section of the Nautel website.
18. Enable the transmitter’s RF output (RF on).