Continental Electronics 816R - Page 6

indicator is still not on, turn primary power off
and disconnect AC power input lines.
Interchange any two primary input leads at
A8TB1. Restore primary power and check
indicator.
7. Adjust the Phase Monitor A8K5 phase loss
threshold fully counterclockwise (190 VAC) if
not done in Step 6.
NOTE
The phase loss/phase rotation monitor will
turn the transmitter off when phase loss or
incorrect sequence is detected. A phase loss
will be detected if the line voltage drops
below the threshold voltage level which is set
by the adjustment control on A8K5. The
threshold voltage range is 190-270V and it
must be set below the lowest expected line
voltage. The only components in the
transmitter that are sensitive to low line
voltage are the blower and cabinet fan motors
which must have at least 190 VAC.
8. Loosen the two retaining bolts at the bottom of
the left cabinet side panel. Grip the panel
securely and lift it off.
9. Apply primary power and press FILAMENT
ON switch on PA Power Control Panel.
10. Remove primary power and observe direction
of rotation of the PA cavity blower and the
cabinet fan as they come to a stop. Cabinet fan
rotation may be observed by lifting the foam
filter from the top right side of the cabinet. PA
cavity blower rotation should be
counterclockwise when viewed from the shaft
end. Cabinet fan roution should be
counterclockwise when viewed from the top.
Install cabinet side panel.
11. Set all circuit breakers to ON and apply
primary power. Press FILAMENT ON switch.
12. Set the TEST METER selector switch to 28V
SUPPLY (40V SCALE). The test meter will
indicate 28 +2.0 V de.
13. Set the AC Metering selector switch to FIL.
The test meter should indicate 6.0 volts (7.2
l' 1
+ 0.1 volts for 816R-5C and 816R-6C). Adjust
filament voltage if it is not correct. Use
procedure in Maintenance Manual. These
adjustments are required to be made at
customer's normal line voltage.
14. Verify that the exciter is on.
NOTE
The transmitter is adjusted and pre-tuned
at the factory for specific customer power
output and frequency requirements. In
normal applications, the fine-tuning and
adjustment procedures provided in Steps 14
through 27 are adequate to ensure proper
transmitter operation.
15. Press the POWER CONTROL switch
MANUAL for manual power control operation.
16. Set the POWER switch to FORWARD.
17. Set the TRANSMITTER CONTROL switch to
LOCAL.
18. Press the PLATE ON switch. The PLATE ON
switch lamp will light.
19. Adjust PA GRID TUNING for minimum IPA
reflected power.
20. Slightly adjust the PA LOADING and PA
TUNING controls until maximum power output
is displayed on the POWER OUTPUT meter.
21. As the transmitter warms up, the IPA reflected
power will rise. Re-tune the PA GRID TUNING
as needed to keep the reflected power below 75
watts (final value is less than 20 watts). Once the
IPA reflected power appears stabilized, repeat
Steps 19 & 20. The final setting should be
established after the transmitter has been on for
at least 30 minutes. Do not re-tune the grid after
the final setting has been established.
NOTE
Operating parameters will become stable within
15-20 minutes. All fine tuning and recording of
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