Replacement of Orderwire Chassis 1A13A7

TM 11-5820-695-35

3-30. Replacement of Orderwire Chassis 1A13A7

b. Replacement.

(fig. 3-1 and 3-16)

(1) With the hinged door 1A13A6 open,

a. Removal.

position replacement orderwire chassis 1A13A7 next to

the left side of electrical equipment chassis 1A14A10

(1) Set the POWER ON/OFF switch on

and align the eight mounting holes on the right side of

meter panel assembly 1A15A8 to OFF.

lA18A7 with the eight mounting holes on the left side of

(2) Disconnect coaxial cable 1A15W16 (fig.

lA14A10.

3-13) from the OUTPUT J8 connector on electrical

(2) Using seven of the eight socket head

frequency synthesizer 1A14.

capscrews removed i-n step a (11), secure the two

chassis together by inserting and partially tightening the

(3) Loosen the two assembly captive screws

seven socket head capscrews. Do not tighten the seven

(fig. 3-1) that secure orderwire-electrical frequency

socket head capscrews at this time.

synthesizer 1A1/1A14 to electrical equipment cabinet

1A15 by alternately turning each assembly captive

(3) Insert

orderwire-electrical

frequency

screw two turns at a time until the captive screws rotate

synthesizer 1A1l/1A14 into electrical equipment cabinet

freely.

1A15. Alternately tighten the two assembly captive

screws on 1Al8/1A14 two turns at a time, until

(4) Grasp the two handles on orderwire

1A13/1A14 is firmly seated in electrical equipment

electrical frequency synthesizer 1A13/1A14 and

cabinet 1A1S.

carefully remove lA13/1A14 from electrical equipment

cabinet 1A15.

(4) Using a socket head screw key, tighten

the seven socket head capscrews on the inner right side

(5) Alternately loosen the two captive screws

of orderwire chassis lA13A7.

securing plug-in component lA13Al to orderwire chassis

1A13A7.

(5) Loosen the two assembly captive screws

that secure 1A13/1A14 to electrical equipment cabinet

(6) Grasp the component frame around each

lA15 by alternately turning each assembly captive screw

captive screw and slowly extract lAl3Al from its position

two turns at a time until the captive screws rotate freely.

in lAS1A7 (TM 11-5820-69512).

(6) Grasp the two handles on 1A13/1A14 and

(7) Loosen the two hinged door captive

carefully remove 1A13/1A14 from electrical equipment

screws (fig. 3-16) securing hinged door 1A13A6 to

cabinet lA1S.

orderwire chassis lA13A7 and lower the hinged door.

(7) Remove the 12 mounting screws and lock

(8) Using a card extractor, remove plug-in

washers that secure the rear cover to orderwire chassis

components 1A13A2 through lA1SAS (TM 115820-695-

1A13A7. Being careful not to damage any of the wires

12) from the defective orderwire chassis.

connected to the plug on the rear cover, slide the rear

(9) Remove the 12 mounting screws (fig.

cover away from the orderwire chassis to provide

316) and lock washers that secure the rear cover to

access to the interior of orderwire chassis 1AlSA7.

orderwire chassis 1A13A7. Being careful not to damage

(8) Insert the remaining socket head

any of the wires connected to the plug on the rear cover,

capscrew, removed in a(10) above, into the inner right

slide the rear cover away from the orderwire chassis to

side of orderwire chassis 1AlA7 and tighten it using the

provide access to the interior of orderwire chassis

socket head screw key.

1A13A7.

(9) Replace the rear cover remove in step

(10) Using a socket head screw key, remove

b(7) and secure with the 12 mounting screws and

the socket head capscrew on the lower rear right side

lockwashers.

wall of orderwire chassis 1AlA7 (fig. 316). Replace the

rear cover removed in step a(9) and secure with the 12

(10) Insert plug-in component lA1SAl into its

mounting screws and lock washers.

proper position in orderwire chassis 1A13A7 and tighten

the two captive screws that secure lA13Al1 to 1AlA7.

(11) Using the socket head screw key, remove

the remaining seven socket head capscrews that secure

(11) Carefully insert plug-in components

orderwire chassis 1A1SA7 to electrical equipment

1A18A2 through 1A1AS into their proper positions in

chassis 1A14A10. Separate the two chassis.

orderwire chassis lA13A7 making certain that each plug-

in component is properly seated in the guide rails

(12) Close the hinged door of defective

located on the upper and lower portion of orderwire

orderwire chassis lAlA7 and tighten the two hinged door

chassis lA13A7.

captive screws.

3-51