Repair of Orderwire Assembly 1A13

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

multiplier1A11, varactor diode replacement.

to the connector rack. Remove the plug-in component

used for connector alignment.

data modem chassis 1A12A12 replaceable at the direct

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