TM 11-6660-200-14
5-23.
WIND DIRECTION INDICATOR SYNCHRO ZEROING.
1.
Loosen four turn-lock fasteners (1) and remove rear cover (2).
2.
Remove seven wires from synchro (3).
3.
Loosen three screws (4) on clamp (5).
4.
Install test connections on synchro (3) as shown in wiring diagram.
CAUTION
Do not apply power to synchro for more than 30 seconds. Application of power for a longer period of time will
overheat and damage synchro.
5.
Turn synchro (3) until pointer indicates N (north), and tighten three screws (4).
6.
Disconnect from power source.
7.
Remove test connections from synchro.
8.
Using screws (6), install indicator wiring as shown in table below.
TERMINAL NO.
WIRE COLOR
WIRE NO.
INDEX NO.
R1
White
4-6
7
Brown
4-16
8
R2
Black
4-1
9
Grey
4-8
10
S1
Green
4-2
11
S2
Red
4-4
12
S3
Yellow
4-5
13
9.
Install rear cover (2) and tighten four turn-lock fasteners (1).
5-32
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