TM 11-6625-2948-14+P
(5) Replacement Procedures are the reverse of the removal
(2) Remove the top and bottom cover of Signal Generator
procedures.
SG-1145/URM.
WARNING
(6) After the high voltage control board 1A4 has been
replaced, perform the adjustments outlined in paragraph
D I S C H A R G E ALL HIGH VOLTAGES PER
INSTRUCTIONS ON THE PROTECTIVE
f. Removal and Replacement of High Voltage Box 1A5
C O V E R OF 1A3 BEFORE ATTEMPTING
THE REMOVAL OF THE PUSHBUTTON
BOARD ASSEMBLY.
WARNING
(3) Remove the five screws that mount the protective
DISCHARGE ALL HIGH VOLTAGE AT
cover and remove the cover.
CONNECTOR 1A5P10 (MATING WITH
(4) Disconnect all connectors (J1-J8) to the pushbutton
1A3A1J8) BEFORE ATTEMPTING THE
board assembly 1A3 and tag each connector for ease of
REMOVAL
OF
THE
HIGH
VOLTAGE
replacement. Remove the wire connectors (E1-E7) from
B0X ASSEMBLY.
underneath 1A3.
(5) Remove the knobs from the INT SQ WAVE, INT FM
D E V , HOR SWP PHASE and
F controls on the front
(2) Remove the top and bottom cover of Signal Generator
panel.
SG-1145/URM.
(6) Remove the two screws that secure the pushbutton
board to the front panel.
the connection on the high voltage control board 1A4 and
the pushbutton board assembly 1A3.
(7) Remove the remaining screws from the bindings posts
that mount the pushbutton board to the chassis.
(4) Remove the four screws that mount the high voltage
box 1A5 to the bottom of the chassis and remove.
(5) Replacement is the reverse of the removal procedures.
(9) Gently remove the board from the instrument.
(6) After the high voltage has been replaced perform the
(10) Replacement procedures are the reverse of the remov-
al procedures.
g. Removal and Replacement of Tracking Board Assembly
(11) After the pushbutton board assembly 1A3 has been
1A6 and Tuning Head Assembly 1A7. The tracking board
replaced, perform the adjustments as detailed in para-
assembly 1A6 and tuning head assembly 1A7 are not to be
replaced at the General Support Level. Replacement should
be performed at the Depot Level.
e. Removal and Replacement of High Voltage Control
h. Removal and Replacement of Meter Assembly 1A8
(2) Remove the top, left side, and bottom covers (facing
the instrument) of Signal Generator SG-1145/URM.
(3) Remove the top and bottom covers of Signal Generator
SG-1145/URM.
-
(3) Disconnect cables from connectors 1A4J1 and 1A4J2.
(3) Disconnect all wires connected to meter 1A8M1 and
(4) Remove the eight screws that mount the high voltage
mark.
control board 1A4 to the chassis.