TM 11-5S840-217-34-
b. Set the following switches to CAL in the order given:
(1) X-Y-RHO switch S803.
(2) EL RSVR switch S1601.
c. Connect the oscilloscope to RHO IN TP811 and GRD TP813.
d. Loosen the locknuts on R1121 and R 10Z.
e. Alternately adjust R1102 and R1121 until a null of less than 25 millivolts peak-to-peak is observed on the
oscilloscope.
f. Tighten the locknuts on R1102 and R 121 and recheck the null.
g. Return S1601 and S803 to the OPR position.
7-11. MAP SCALE ALINEMENT
a. Set MAP SCALE switch S1401 to the 1:25K position.
b. Turn the RANGE handwheel for a reading of 5, 000 meters on the RANGE counter.
c. Turn MAP ZERO switch S1605 to 0 (toward plotting table).
d. Turn the MAP SCALE switch to the 1:50K position. Range counter M1402 (1:50K) should read 10,000 meters + 5
meters.
e. If M1402 reads less than 9, 995 meters or more than 10, 005 meters, align the RANGE counters.
f. Return S1605 to its original position.
g. Set the ELEVATION counter to 0 and the MAP SCALE switch to 1:25K; turn the RANGE handwheel for a RANGE
counter reading of 14, 000 meters.
h. Place MAP SCALE switch S1401 to the 1:50K position.
i. Loosen the locknut on SCALE ADJ pot R1409 and adjust R1409 so that 1:50K counter M1402 reads 14, 000
meters.
j. Tighten the locknut and recheck the counter reading.
7-12. AZIMUTH RESOLVER AND COUNTER ALINEMENT
a. Connect the oscilloscope to AZ RSVR TP808 and GRD TP813.
b. Rotate the ELEVATION handwheel so that the ELEVATION counter reads 0.
c. Rotate the RANGE handwheel to obtain a reading of 1,400 meters on the RANGE counter.
d. Rotate the AZIMUTH handwheel to obtain a reading of 1, 600 mils on the AZIMUTH counter.
e. Loosen the four mounting screws that secure resolver B1302 to the azimuth assembly.
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