TM 11-5895-846-14
a. Remove the eight screws and washers which
(3) Install the replacement transformer by
repeating steps (1) and (2) above in reverse order.
fasten the perforated cover to the chassis; remove the
b. To remove connector J1 or J2, proceed as
cover.
b. To gain access to pc board A, proceed as
follows:
(1) Remove the two screws and washers
follows:
which secure the connector assembly to the chassis.
(1) Remove the heat sink plate by removing
(a) To remove connectors J1, remove
the two screws from the bottom of the chassis holding it
the four screws and washers which hold it in place on the
in place.
connector assembly.
(2) To remove pc board A from the heat sink
(b) To remove connector J2, remove the
plate, remove the screws and washers holding the board
to the four standoffs on the back of the heat sink plate.
two nuts and bolts which hold it in place on the connector
c. To gain access to pc board B, proceeds as
assembly.
follows:
(2) Disconnect the wires from the terminals of
(1) Remove the end panel, E, by removing
the connector. Tag or mark each wire with the identity of
the three screws from the bottom of the chassis holding
the terminal to which it was connected.
it in place.
(3) Install the replacement connector by
repeating steps (1) (a), (b), and (2) above in reverse
(2) To remove pc board B from the end
panel, remove the screws and washers holding the
order.
c. Capacitors C16, C13, C10, and C3 are
board to the four standoffs on the back of the end panel.
d. To gain access to pc boards C and D proceed
connected to terminals mounted on the chassis beneath
as follows:
the connector assembly. To remove the capacitors,
(1) Remove the pc board mounting bracket
proceed as follows:
by removing the two screws and washers from the
(1) Refer to step b(1) above to remove the
bottom of the chassis holding it in place.
connector assembly.
(2) To remove pc board C or D from bracket,
(2) Note the polarity of the capacitor to be
remove the screws and washers from the four corners of
replaced so as to insure that same polarity when
the board.
installing the replacement capacitor; disconnect the
e. To gain access to the capacitors under the
capacitor leads and other wires as required from the
connector assembly, remove the two screws and washer
terminals.
securing it to the chassis.
(3) Install the replacement capacitor by
repeating steps (1) and (2) above.
8-14.
Alarm Monitor Power Supply, Component
Replacement
8-15.
Alarm
Monitor
Fault/Safety
Gate
Troubleshooting.
To replace chassis mounted components proceeds as
a. Table 8-9 contains test procedures for
troubleshooting the alarm monitor fault/safety gate.
(1) Disconnect the wires from the transformer
terminals. Tag or mark each wire with the identity of the
equipment required to perform these procedures. Note
terminal to which it was connected.
(2) Remove the four nuts, bolts, and washers
chassis.
8-28