TM 11-6625-821-45
and D of the connector on the fabricated
(1) Set the DC POWER switch to OFF.
cable. This ac voltage will be less than 26
(2) Set the RECEIVER-CONTROL switch to
volts ac when the BEARING INDI-
CONTROL.
CATOR needle is set to the correct null.
(3) All other switches may be set to any posi-
h. With BEARING INDICATOR needle set to
tion.
the correct null, perform the following procedure
to zero the BEARING INDICATOR needle.
as follows:
(1) Loosen the three synchro clamps that hold
(1) Connect the fabricated cable to the connec-
synchro B2 to the synchro housing.
tor at the rear of the BEARING INDICATOR. A
(2) Rotate the entire synchro until the
detailed drawing of the fabricated cable is shown
BEARING INDICATOR needle points to N.
(3) Tighten the three synchro clamps that
(2) Connect the wire from pin A of the con-
hold synchro B2 to the synchro housing.
nector on the fabricated cable to pin M of connec-
(4) Set the DC POWER switch to OFF.
tor P1 on the test set.
i. Replace the front cover on the BEARING
(3) Connect one of the wires from pin B of the
INDICATOR and secure with the eight screws
connector on the fabricated cable to pin H of con-
nector P1 on the test set.
j. Disconnect the fabricated cable from the
(4) Connect the wires from pins C and D of the
BEARING INDICATOR, and replace the BEAR-
connector on the fabricated cable to the INPUT of
k. Replace the control unit in
the test set
(para
(5) Connect wire from pin E of the connector of
the fabricated cable to the test set connector pin
Pi-E.
3-18. Adjustment of
Inverter
f. Set the DC POWER switch to ON.
g. Manually rotate the BEARING INDI-
Adjustment procedures for the inverter are con-
CATOR needle for a null indication on the voltme-
tained in TM 11-5826-225-35 for Direction Finder
ter.
Set AN/ARN-83.
NOTE
A 360 rotation of the BEARING INDI-
3-19. Adjustment of
Control Unit
CATOR needle will produce two nulls
All adjustment procedures for the control unit are
180 from each other. To determine
contained in TM 11-5826-225-35 for Direction Fin-
which is the correct null, measure the ac
der Set AN/ARN-83.
voltage between the wires from pins B