Section IX. MAINTENANCE OF VOLTAGE REGULATOR MONITOR PANEL SM-D-936692

TM 11-5895-1123-34

a. Replacement of the Matrix Patch Board.

(1)

(1) Remove the Central Distribution Frame (CDF)

outlined in paragraph 327 below.

from the side of rack as outlined in paragraph 325 above.

b. Replacement of Multipin Connectors.

(2) Place the CDF front down on a working surface.

(1) Remove the Central Distribution Frame (CDF)

(3) Loosen the four captive quarterturn fasteners (1)

from the side of rack 8 as outlined in paragraph 325

holding the slide panel on the side of the CDF to the

above.

CDF.

(2) Remove the four screws holding the clear plastic

(4) Pull on the slide panel handle and extend the

shield over the terminal boards and remove the shield.

slide panel from the CDF.

(3) Remove the 26 screws holding the front panel to

(5) Remove the five screws and nuts (2) which hold

the CDF and remove the front panel.

the frame of the bottom slide rail to the lower part of the

(4) Loosen the four captive quarter turn fasteners on

matrix patch board.

the side slide panel and extend the panel outwards.

(6) Remove the bottom slide rail and frame (3) from

(5) Follow the procedure for replacement of multipin

the CDF.

connectors as outlined in paragraph 36b above.

(7) Tag and unsolder the leads connected to the

(6) Release the slide latches and push the panel

solder terminals on the matrix patch board.

back into CDF and tighten the fourquarter turn fasteners

(8) Remove the two bolts (4) which hold the two

to secure it in place.

cable retractor arms to the matrix patch board.

(7) Mount the front panel on the CDF and secure it

(9) Remove the 10 mounting screws and nuts (5)

in place with the 26 mounting screws.

that hold the matrix patch board to the slide panel frame

(8) Mount the clear plastic shield over the terminal

and remove the matrix patch board from the CDF.

boards and secure it in place with the four mounting

(10) Insert the replacement matrix patch board slide

screws.

panel frame and secure it in place with the 10 mounting

(9) Mount the CDF on the side of rack 8 as outlined

screws and nuts (5) on the top and right end of the

in paragraph 327 below.

matrix patch board. (Do not insert the bottom slide rail

3-27. Replacement of the Central Distribution Frame

and frame).

SMF935726

(11) Attach the two cable retractor arms to the

WARNING

replacement matrix patch board by inserting and

Two persons are required to perform

tightening the two bolts (4) into the mounting holes on

this procedure due to the bulk of the

the matrix patch board.

unit, a. Be sure the ac power to the CSS

(12) Prepare the leads for soldering and using good

is off.

soldering practices solder the leads to the appropriate

b. Position the CDF on the side of rack 8 and

solder terminal on the matrix patch board.

tighten the five captive screws along the top edge to

(13) Insert the bottom slide rail and frame (3) into the

secure it to the rack.

CDF and secure it in place with the five mounting screws

c. Tighten the five captive screws along the bottom

and nuts (2).

edge of the CDF to secure them to the side of the rack.

(14) Release the latches on the slides and push the

d. Connect the four cables to the bottom

slide panel back into the CDF.

connectors on the CDF.

(15) Tighten the fourquarter turn fasteners (1) on the

e. Connect the four cables to the top connectors on

slide panel to secure in place in the CDF.

the CDF.

(16) Mount the CDF on the side of rack 8 as

f. Reenergize the ac power to the CSS.

Section IX. MAINTENANCE OF VOLTAGE REGULATOR

MONITOR PANEL SM-D-936692

NOTE

3-28. Removal of Voltage Regulator Monitor Panel

The voltage regulator monitor panel

(panel) SM-D-936692

testing and repairing procedures require

a. At the power distribution panel, turn the ac power

various degrees of removal; therefore it

off to racks 4, 5, and 6.

should only be completely removed

b. Loosen the four captive screws holding the

when indicated in the procedures.

3-49