TM 55-1930209-14&P-12
4-18.2.5.2 Replacement
a.
Power control module fuse Replace 0.5 A fuse located on side of telephone station selector box as follows:
(1) Unscrew fuse holder
(2) Remove bad fuse
(3) Install new fuse
(4) Replace fuse holder
(5) Check that indicator light on telephone station selector box telephone system PUSH-N/PUSH-OFF switch
comes on when switch is pushed on
b.
Power control module
WARNING
Make sure telephone paging system is electrically dead before making repairs on power amplifier.
Open (OFF) and redtag circuit breakers 3P14 and 10P13A7 with: "WARNING DO NOT ACTIVATE.
REPAIRS BEING MADE."
(1) Remove four screws securing power control module box cover and remove cover.
(2) Tag and disconnect all wires from power control module terminal board.
(3) Remove power control module from power control module enclosure.
(4) Install new power control module in enclosure.
(5) Reconnect all tagged wires to terminal board.
(6) Install cover and attach with four mounting screws.
c.
Power amplifier
WARNING
Make sure telephone paging system is electrically dead before making repairs on power amplifier.
Open (OFF) and redtag circuit breakers 3P14 and 10P13A7 with: "WARNING DO NOT ACTIVATE.
REPAIRS BEING MADE."
(1) Remove four screws from power amplifier box cover and remove cover.
(2) Tag and disconnect all wires from power amplifier terminal board.
(3) Remove power amplifier from power amplifier enclosure.
(4) Install new power amplifier in power amplifier enclosure
(5) Reconnect all tagged wires to terminal board.
(6) Install cover and attach with four mounting screws.
4-18.2.6 Headset. No maintenance procedures are applicable for headset other than test by substitution and replace if
faulty.
4-18.2.7 Headset station
4-24
