10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 2-9
01 October 2002
NOTE
DC return for remote alarm/status monitoring
circuit's DC power source should be obtained from
TB2-18.DC return for the forward/reflected power
monitoring circuits should be obtained from TB2-
13. Refer to paragraph 2.1.8 to install exciter
interlock wiring.
2.2.5. INSTALLATION OF AC
POWER SUPPLY ASSEMBLY: Install the AC
power supply (A1) in the cabinet's power supply
compartment, noting it consists of the power
transformer and two B+ Volts chokes, as follows:
(a) Disconnect the lower, rear panel from the back
of the cabinet, noting there is a 2 AWG black
wire connected to it and swing it off to one side.
Ensure painted surfaces are protected and the
wiring is not damaged.
NOTE
It may be necessary to disconnect the four 22 AWG
wires (#99, 100, 101 and 102) from TB2 when
removing the lower, rear panel.
(b) Open the power supply control panel and
secure it in a manner that will prevent it from
obstructing access to the interior of the cabinet.
(c) Remove the power supply air blocker, noting it
prevents frontal access to the rear power supply
compartment. Remove the two screws securing
it to the IPA power supply cover at the bottom
and the two screws securing it to the horizontal
air blocker at the top. Then, carefully remove
the air blocker. Retain all hardware.
(d) Locate an unidentified black 2 AWG jumper
wire that will be attached to the power
transformer's ground stud, noting it is located
adjacent to the safety ground stud at the rear of
the cabinet.
(e) Locate three black 2 AWG wires (#305, 306
and 307) that will be attached to the power
transformer (A1T1), noting they are tyrapped
together at the left-hand side of the power
supply compartment, when viewed from rear.
Remove shipping tyraps.
(f) Locate two black 2 AWG wires (#314 and 318)
that will be attached to B+ volts choke A1L1, noting
they are tyrapped together at the right-hand side of
the power supply compartment when viewed from
rear. Remove shipping tyraps.
(g) Locate two black 2 AWG wires (#315 and 319)
that will be attached to B+ volts choke A1L2,
noting they are tyrapped together at the left-
hand side of the power supply compartment,
when viewed from rear. Remove shipping
tyraps.
(h) Locate six black 6 AWG wires (#308, 309,
310, 311, 312 and 313) that will be attached to
the power transformer (A1T1), noting they are
tyrapped together in the back of the power
supply compartment, when viewed from rear.
Remove shipping tyraps.
(i) Locate connector P15 that will be attached to
J1 of the power supply, noting it has been
secured to the wiring harness at the right-hand
side of the power supply compartment, when
viewed from the rear. Remove shipping tyraps.
The power supply weighs approximately 200
kilograms (441 pounds). Sufficient manpower or
mechanical assistance should be available, to
prevent injury to personnel or damage to the
equipment.
(j) Position the power supply at the rear of the
transmitter with its power transformer's
primary terminals (H1, H2 and H3) facing
away from the cabinet.
(k) Remove the bolts securing the power supply to
its shipping pallet.
(l) Note the four 3/8-16 x 1 bolts, flat washers and
split washers that are threaded into the
transformer mounting holes in the cabinet
bottom. Remove these bolts and retain.
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