Replacement of Switches

TM 11-5895-1123-34

(18) Replace any nylon tie wraps that were removed

(20) Mount the patch panel face on the patch panel

from the cables.

frame.

(19) Mount the patch panel face on the patch panel

(21) Mount and tighten the eight nuts on the screws

frame.

protruding through the rear of the rigid support bar on the

(20) Mount and tighten the eight nuts on the screws

frame.

protruding through the rear of the rigid support bar on the

(22) Place the patch panel in its rack as outlined in

frame.

paragraph 319 below.

(21) Place the patch panel in its rack as outlined in

d. Upper or Lower Terminal Board Repair.

paragraph 319 below.

(1) Remove the communication VF patch panel

c. Replacement of Switches.

from the rack as outlined in paragraph 317 above.

(1) Remove the communication VF patch panel

(2) Remove the 10 screws holding the wire mesh to

from the rack as outlined in paragraph 317 above.

the frame above the terminal board and remove the

(2) Remove the eight nuts protruding through the

mesh.

rear of the rigid support bars which hold the face of the

(3) Perform the necessary repair.

patch panel to the frame.

(4) Replace the wire mesh on the frame and secure

(3) Pull forward on the face of the patch panel until

it with the 10 mounting screws.

the mounting screws clear the holes in the rigid support

(5) Place the patch panel in the rack as outlined in

bars on the frame.

paragraph 319 below.

(4) With the face of the patch panel standing in the

e. Replacement of the Noise Weighting Networks.

upright position, remove the 18 screws from the front

(1)

Remove the communication VF patch panel

panel that hold the three subpanels above the defective

from the rack as outlined in paragraph 317 above.

switch to the front panel.

(2) Remove the eight nuts protruding through the

(5) Put the lever on the defective switch in the down

rear of the rigid support bars which hold the face of the

position.

patch panel to the frame.

(6) Remove the two screws from the front of the

(3) Pull forward on the face of the patch panel until

patch panel that hold the defective switch to the panel.

the mounting screws clear the holes in the rigid support

(7) Pull downward on the front of the patch panel

bars on the frame.

and rest it face down.

(4) Rest the front of the patch panel face down in

(8) Reach beneath the front of the patch panel and

the front of the frame.

push upward on the three loose subpanels to dislodge

(5) Remove the two mounting screws from the

them from the panel.

outside of the side of the frame that hold the defective

(9) Remove the three loose subpanels from the

noise weighting network in place.

patch panel to allow access to the defective switch.

(6) Tag and unsolder the four wires connected to

(10) Lifting upward and twisting outward from the

the top of the noise weighting network.

patch panel remove the defective switch.

(7) Prepare the wires for soldering and using good

(11) Tag the wires connected to the switch contacts

soldering practices, solder the wires to the replacement

and unsolder them from the switch.

noise weighting network.

(12) Prepare the wires for soldering and using good

(8) Mount the noise weighting network in place and

soldering practices, solder them to the replacement

secure it to the side of the frame with the two mounting

switch.

screws.

(13) Set the lever on the switch so that it is pointing

(9) Lift the front of the patch panel to an upright

toward its mounting slot on the patch panel.

position and mount it to the front of the patch panel

(14) Pushing downward and twisting it inward towards

frame.

the patch panel, mount the switch back in place on the

(10) Mount and tighten the eight nuts on the mounting

rear of the patch panel.

screws protruding through the rear of the rigid support

(15) Seat the three subpanels back into their proper

bar on the frame and secure the front of the patch panel

positions in the patch panel.

to the frame.

(16) While supporting the subpanels, lift the front of

(11) Place the patch panel in its rack as outlined in

the patch panel to its upright position.

paragraph 319 below.

(17) Grasp the lever on the replacement switch and

f Replacement of Multiple Connectors on the Rear

pull it towards the front of the panel.

Frame.

(18) Insert and tighten the two mounting screws to

(1)

Remove the communications VF patch panel

secure the switch in place.

from the rack as outlined in paragraph 317 above.

(19) Insert and tighten the 18 mounting screws to

(2) Remove the eight nuts protruding through the

secure the three subpanels to the patch panel.

rear of the rigid support bars which hold the face of the

patch panel to the frame.

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