2.13
Pre-Turn On Checks (Mechanical)
Although appropriate packaging and shipping precautions are
taken before the equipment leaves the factory, hardware some-
times works loose during shipment. The transmitter should be
checked for any debris, loose hardware and loose connections
before applying primary power. Pre-turn on checks and inspec-
tion should include:
a. Check for debris and loose hardware, both in the transmit-
ter and in the AC power panel.
b. Check for loose connections, in particular at the following:
1. Filter capacitors
2. High voltage and low voltage supply rectifier diodes
3. Output network clips, insulators, and hardware
4. PA Power supply transformer
5. Low voltage supply transformer
c. Check RF drive cable connectors. Ensure that cable con-
nectors are properly locked into their printed circuit board
sockets.
d. Check ribbon cable connectors. Ensure that cable connec-
tors are properly locked into their printed circuit board
sockets.
e. Ensure that output network connections and coil taps are
tight, especially at high current points. (Over tightening
can strip threads or break bolts, especially where brass
hardware is used).
f. Ensure that no shipping ties, blocks, or tape remain.
2.14
Pre-Turn On Checks (Electrical)
Before initial turn on, ensure that the following items have been
completed:
a. A ground strap must be properly connected between the
transmitter and the station earth ground.
b. AC input wiring must be properly connected and connec-
tions must be tight.
c. The transmitter RF output must be properly terminated
with a suitable load capable of handling rated output
power. This can be either an antenna system or a dummy
load.
d. External interlocks must be satisfied.
e. Audio input must be properly connected.
f. Monitoring equipment is properly connected.
g. SECTION III, Operators Guide, in this technical manual
should be read and understood.
2.15
Initial Turn On Procedure
The initial turn on procedure provides checks or adjustments in
the following sequence:
a. Low Voltage Power Supply test.
b. Underdrive overload test.
c. PA Power Supply check.
d. Fan rotation check.
e. Driver operation check.
f. Raise/Lower Function check.
g. Power Amplifier turn on check.
h. Setting RF monitor levels.
i. Modulation check.
j. Setting Audio Input level.
k. Audio Input phasing check.
l. Battery Backup for controller.
m. Recording normal meter readings.
If all Installation Procedures up to this point have been com-
pleted, the transmitter is ready to be powered up by the following
sequence. Each step assumes the preceding step has been suc-
cessfully completed.
WARNING
IF YOU MUST ENTER ANY PART OF THE TRANSMITTER EXCEPT
THE FRONT NON-INTERLOCKED COMPARTMENTS, TURN OFF
THE TRANSMITTER BY DEPRESSING THE “OFF” BUTTON, SET
THE REMOTE/LOCAL SWITCH ON THE STATUS PANEL TO “LO-
CAL,” AND REMOVE SINGLE PHASE AND THREE PHASE PRI-
MARY POWER AT THE MAIN DISCONNECT. BEFORE REMOVING
PANELS OR OPENING DOORS, VERIFY THAT THE PA POWER
SUPPLY IS DISCHARGED BY CHECKING “SUPPLY VOLTS” ON
THE FRONT PANEL MULTIMETER.
CAUTION
GROUNDING STICKS ARE PROVIDED INSIDE THE TRANSMIT-
TER AND SHOULD BE USED TO ASSURE THAT ALL HIGH VOLT-
AGE HAS BEEN REMOVED.
CAUTION
WHEN WORKING IN THE FRONT NON-INTERLOCKED COM-
PARTMENTS, BE CAREFUL NOT TO GROUND ANY CONNEC-
TIONS WHICH ARE STILL ENERGIZED. THIS INCLUDES ALL
LOW VOLTAGE CIRCUITS IF THE LOW VOLTAGE SWITCH CIR-
CUIT BREAKERS CB1 AND CB2 HAVE NOT BEEN SET TO THE
“OFF” POSITION.
CAUTION
IF ANY ABNORMALITIES ARE ENCOUNTERED IN THE FOLLOW-
ING STEPS, STOP THE PROCEDURE AND REFER TO THE TROU-
BLESHOOTING SECTION OF THIS TECHNICAL MANUAL.
Find the packet shipped with the transmitter entitled Factory Test
Data. This data should be used as reference during the initial turn
on procedure.
2.15.1
Power Supply Test
This test will be the first application of single phase AC power
to T2, Low Voltage transformer. This will energize the control
circuitry and allow Low Voltage meter readings to be taken.
Section II - Installation
Rev. AA: 8/9/2000
888-2297-002
2-7
WARNING: Disconnect primary power prior to servicing.
