|
| TM 11-5820-695-35
(2) Replace and tighten the four screws
removed in b(4) which secure digital data modem chassis
1A12A12 to the chassis case.
(3) Replace and tighten the two screws
removed in step b(2) above.
(5) If a connector (1A12A12XA2 through
1A12A12XA13) has been replaced, use the plug-in
component that mates with the connector as a gauge in
aligning the replacement connector as follows:
(a) Loosen the two screws securing the
replacement connector to the connector rack.
(b) Insert the mating plug-in component
into the guide rails for the replacement connector and
slowly slide it back until firmly seated in the replacement
Figure 4-3. Transmitter amplifier-frequency
connector., Tighten the two screws securing the connector
to the connector rack. Remove the plug-in component
used for connector alignment.
data modem chassis 1A12A12 replaceable at the direct
(c) Repeat steps ('5)(a),and (b) for each
support level (para 3-29). Digital data modem 1A12 depot
of the replacement connectors (1A12A12XA2 through
repair entails parts replacement on plug-in components
1A12A12XA10).
1A12A2 through 1A12A10 and on digital data modem
chassis 1A12A12. Location of parts on the plug in
(6) Insert the rear cover back on digital data
components is shown in figures 5-75 through 5-83. No
modem chassis 1A12A12 and secure with the four screws
special instructions are required for parts replacement.
removed in step b(1) above.
Digital data modem chassis 1A12A12 parts location is
4-8. Repair of Orderwire Assembly 1A13
provided in figures 4-15 through 4-19. Disassembly of
Orderwire assembly 1A13 contains five plug-in daughter
digital data modem chassis 1A12A12 is described in b
board assemblies 1A13A1 through 1A13A5 replaceable
below.
at organizational level and an orderwire chassis
b. Disassembly of Digital Data Modem Chassis
(1A113A7) replaceable at the direct support level (para 3-
1A12A12.
30). Depot repair of these assemblies is piece part
replacement. Parts location for daughter board
(1) Remove the four screws securing the rear
assemblies 1A13A1 through 1A13A5 is provided in figures
cover to digital data modem chassis 1A12A12 and
584 through 5-89. Parts location for orderwire chassis
remove the rear cover.
1A13A7 is shown in figures 4-20 and 4-21. No special
(2) Remove the two screws located between
instructions are required for depot level disassembly and
jack pair, 1A12A12A1J1 and 1A12A12A1J2, and
piece part replacement.
1A12A12A2J3 and 1A12A12A2J4.
4-9. Repair of Electrical Frequency
(3) Turn digital data modem chassis 1A12A12
Synthesizer 1A14 and 2A14 With the exception of
upside down and remove the two screws on outside of
reference designators, electrical frequency synthesizer
chassis case.
1A14 in T-1054/RC-144 is identical to electrical frequency
(4) On the plug-in component connector rack,
synthesizer 2A14 in R-1467/GRC-144.
Electrical
remove the four screws securing digital data modem
frequency synthesizer 1A14 contains six repairable plug-
chassis 1A12A12 to the chassis case.
in components (1A14A1 through 1A14A6) and two
(5) Slide digital data modem chassis 1A12A12
nonrepairable plug-in components (1A14A7 and 1A14A8)
out the back end of the chassis case, thereby allowing
all replaceable at the organizational level. The electrical
access to all parts.
equipment chassis 1A14A10 with printed wiring board
assembly 1A14A9 is replaceable at the direct support
c. Reassembly of Digital Data Modem Chassis
level (para 3-31).
With the exception of the two
1A12A12.
nonrepairable plug-in components, depot repair of these
(1) Slide digital data modem chassis 1A12A12
into the chassis case.
4-5
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |