TEST PROCEDURE-continued - TM-11-5820-401-34-30456

TM 11-5820-401-34-3/0967-LP-432-3060

5-15. CRYSTAL REFERENCE SYSTEM (CRS) TEST. (CONT)

3. Raise A3000 tray (1). (See test setup diagram

4. Remove A1000 cover (2) and install alinement cover with at least one screw to ensure

good ground.

5. Ground TP3001 (3) with screwdriver.

6. Adjust L1502 (4) to get clearest possible 1000-HZ tone from speaker.

7. Remove ground from TP3001. Tone must not change.

NOTE

If the tone heard changes to a rushing noise when step 7 is completed, the CRS is

defective. See the troubleshooting section.

8. Set R-442/VRC MC-TUNE-KC control to 40.00 MHz, then back to 30.00 MHz. Tone must not

change.

NOTE

If the tone changes after step 8 is completed, the CRS may be defective. See the

troubleshooting section.

9. Set R-442/VRC MC-TUNE-KC control to 30.50 MHz.

10. Remove rf cable and matching unit from AN/URM-103 LO-RF jack and insert in HI-RF

jack.

11. Remove P1004 from J1004 on A1000 tray.

12. Remove rf cable from ANT jack on R-442/VRC.

13. Connect rf cable to P1004 using Amphenol Adapter M-39012/16.

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