The multimeter should indicate between 5.5 and 6.5 volts. If this indication is
not obtained, adjust R4 FIL for a 6 volt reading on the multimeter.
STEP 6.
Perform this check with the multimeter in the 10-volt d-c range. Connect the
negative meter probe to TP3 and the positive meter probe to TP4.
At these test points the multimeter should read between 5.5 and 6.5 volts. If
not, adjust R3 FIL for a 6 volt reading.
STEP 7.
This step requires the multimeter to be operating on the 2.5 volt d-c scale.
After preparing the meter, connect the negative meter probe to TP5 and the
positive probe to TP6.
The meter should indicate between 0.67 and 0.77 volt. If the meter indication
is not within these limits, adjust R1 BIAS DRIVER for 0.72 volt.
STEP 8.
With the meter prepared for operation on the 2.5 volt d-c scale, connect the
negative meter probe to TP5 and the positive probe to TP7.
The meter should indicate between 0.70 and 0.80 volt. If the indication is
outside these limits, adjust R2 BIAS OUTPUT for 0.75 volt.
STEP 9.
Repeat the voltage checks made in steps 5 thru 8. Refine any voltages that are
not within specifications.
STEP 10. Close the cover, turn transmitter OFF, disconnect cable CX-10879, and
replace transmitter RF head in the transmitter case.
The ten steps you have just read cover the checks and adjustments you should make after a new
transmitter tube is installed in the RF head. The radio set should be aligned by a higher category
of maintenance at the earliest possible date after installing a new tube. Now back to the third
check made in an organizational monthly PM check. Close Fold-Out 14 and continue to (3).
(3) The third organizational monthly PM check involves the receiver of the radio
set. This check is performed by first removing the receiver RF head and receiver fixed head
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