Section VII. MAINTENANCE OF C/N TEST SET TS-3580

TM 11-5895-1123-34

3-6b above to replace the defective multipin connector.

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

NOTE

paragraph 322 below.

In the next step of this procedure,

h. Replacement of Switches on Subpanel B.

because of the location of the mounting

(1) Remove the TTY/low level patch panel from the

screw, some bending of the contacts on

rack as outlined in paragraph 320 above.

the switch can be expected.

This

(2) Remove the 24 screws on the front panel which

bending shall be kept to a minimum so

hold subpanels A, B, C, and D to the patch panel frame.

that the contacts can be rebent into their

(3) While providing support to the subpanels, set the

proper positions.

patch panel face down with the A and D subpanels

(11) Secure the switch to the panel with the mounting

toward the front.

screw.

(4) Reach under the face of the patch panel and

(12) Lift the subpanels back into the patch panel, and

push the subpanels upward to release them from the

gradually work them back into their positions in the

frame.

(5) Gradually work the subpanels forward by inching

(13) While providing the subpanels with support, set

the D, A, B and C subpanels forward, in that order, to

the patch panel upside down with the face towards the

face them from the drawer.

front.

(6) Spread the A, B, and C subpanels apart, and

(14) Secure the subpanels to the patch panel by

remove the mounting screw holding the defective switch

inserting and tightening the 24 mounting screws to the

to the subpanel.

face of the patch panel.

(7) Tag and unsolder the wires connected to the

(15) Replace the patch panel in the rack as outlined

defective switch.

in paragraph 322 below.

(8) Pull the defective switch upward and outward to

3-22. Replacement of Communications TTY/Low

remove it from the subpanel.

Level Patch Panel SMA935861 a. Mount the patch

(9) Insert the replacement switch into the subpanel

panel on the slides.

by pushing it inward and downward into place.

b. Connect the three cables to the connectors on

(10) Prepare the wires for soldering and, using good

the rear frame of the patch panel.

soldering practices, solder the wires back to the switch

c. Release the slide latches and push the patch

connections.

panel into the rack.

d. Tighten the four captive screws on the front

panel to secure the patch panel to the rack.

Section VII. MAINTENANCE OF C/N TEST SET TS-3580

3-23. Removal of C/N Test Set TS-3580 Refer to

NOTE

paragraph 3-9 above.

Removal and replacement procedures

3-24. Replacement of C/N Test Set TS-3580 Refer to

for the C/N test set are covered in this

paragraph 3-13 above.

section.

Refer to the appropriate

technical

manual

for

further

maintenance data.

Section VII. MAINTENANCE OF CENTRAL DISTRIBUTION

Frame (CDF) SM-F-935726

3-25. Removal of the Central Distribution

Tag, if necessary, and disconnect the

four cables connected to the bottom of the CDF.

WARNING

d. Loosen the five captive screws fastened along

Two persons are required to perform

the bottom holding it to the rack frame.

this procedure due to the bulk of the

e. While supporting the CDF, loosen the five

unit.

captive screws along the top edge holding it to the rack

a. Turn off the ac power to the CSS.

frame.

b. Tag, if necessary, and disconnect the four

cables connected to the top of the CDF.

3-47