TM11-6625-2948-14+P
b. -1250 Volt Adjustment.
(4) Loosen the two screws that mount the meter assembly
1A8 to the mounting bracket.
(1) Set the Signal Generator for CW operation (see para
(5) Loosen the two screws that mount the mounting
bracket to the front panel and gently slide the meter
assembly 1A8 out.
( 2 ) Rotate BEAM CURRENT ADJ 1A5A2R5 (fig.4-6)
and 4-6.1) to midpoint.
(6) Replacement is the reverse of removal procedures.
(3) Set digital multimeter to 20 VDC range. Connect pin 4
i. Removal and Replacement of 400-60 Hz Converter
of the test connector 1A4TP to V-
pin 2 to COMMON.
(4) Adjust BEAM CURRENT ADJ 1A5A2R5 for an
indication of 2.50 V 10% on the multimeter (fig. 4-6
(2) Remove the top cover of Signal Generator SG-1145/
and 4-6.1 for location of 1A5A2R5).
URM.
(5) Set differential voltmeter for 6000-volt dc range,
(3) Disconnect the four clip leads of cable 1W1.
connect + lead to chassis and - lead to pin 2 of connector
(4) Remove the three screws that mount the 400-60 Hz
converter board assembly 1A10 to the three mounting
posts and remove the board.
(6) Adjust the H.V. ADJ control 1A4R21 for 1250 volts
(5) Replacement is the reverse of the removal procedures.
(7) Glyptol-lock the potentiometer 1A4R21.
j. Removal and Replacement of Klystron 1V1, Detector
1Z1, Probe Assembly 1W14 and Probe Assembly 1W15.
The klystron 1V1, detector 1Z1, probe assembly 1W14
and probe assembly 1W15 are not to be replaced at the
c. -1850 Volt Adjustment.
General Support level. Replacement should be performed
at the Depot level.
(1) Set the signal generator for CW operation (see para-
( 2 ) S e t d i f f e r e n t i a l v o l t m e t e r f o r 6000-volt dc range,
connect + lead to chassis, and the - lead to pin 3 of con-
nector 1A3A1J5 (fig. 4-9 and 4-9.1). I and turn
F control
in making test measurements.
fully clockwise.
a. Instrument adjustment procedures are given in para-
graphs 4-7b. through e. After performing any of the
(3) Adjust the -1850 control 1A3A1R42 for 1850 volts
adjustment and calibration procedures given below, per-
form the minimum performance checks. Remove the
top cover and left side cover of the signal generator. Con-
(4) Glyptol-lock potentiometer A3A1R42.
C o n n e c t power cord to ac source and switch POWER
switch to the ON position.
(6) Return the
F control to the center "0."
WARNING
d. Beam Current Adjustment.
HIGH VOLTAGES ARE PRESENT AND
NOTE
P R O P E R SAFETY PRECAUTIONS MUST
The beam current is adjusted after adjusting
BE EXERCISED WHEN MAKING ANY
ADJUSTMENTS.
the -1250 and -1850 volts supplies.