TM 11-5840-208-30-1
Section V. ANTENNA POSITIONING CHECKS
PARA
SYMPTOM
CIRCUIT
CHECKS
PAGE
3-20
a.
Antenna will not move
ELEVATION
a. TB1006-1 (+27VDC
up
S655 in raise)
100
b. S655
100
b.
Antenna will not move
ELEVATION
a. TB1005-9 (+27VDC
down
S655 in lower)
100
b. S655
100
c.
Antenna will not move
ELEVATION
a. S655 center terminal
up or down
(+27VDC)
100
b. B3004
101
c. Limit switches S3008,
S3009.
101
d. AC brake
101
d.
K1501, K1502 chatters
ELEVATION
a. CR1504 or CR1505
when S655 is placed in
raise or lower.
100
a. C1501, C1502, C1503,
e.
K1501, K1502 shows
ELEVATION
signs of arcing.
C1504
100
3-21
a.
Antenna will not move
AZIMUTH
a. TB3001-9 (+27VDC)
in CCW position.
S656 in CCW position.
102
b. TB1005-7 (+27VDC
S656 in CCW position.
102
c. Center terminal of
S656 (+27VDC)
102
b.
Antenna will not move
AZIMUTH
a. TB3001-8 (+27VDC)
in CW position
S656 in CW position.
102
b. TB1005-8 (+27VDC)
S656 in CW position.
102
c.
Antenna will not move
AZIMUTH
a. B3003
103
in CW or CCW positions
b. TB3001-5 (0)
+27VDC return
103
c. TB3002-8 (OV) +27VDC
return
103
d. S656 center terminal
(+27VDC)
102
e. TB3003-5 DC brake
103
Page 40
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