Initial Conditions and Checks-CONT.

TM 11-5895-1123-34

turning knurled portion counterclockwise. The lamp is

(2) Tag leads and remove the three terminal

retained by a pushfit within the threaded portion at rear of

screws.

the lens assembly.

(3) Remove the two screws which mount the

(2) Grasp the lamp flange at the rear of the lens

receptacle to the panel.

assembly with fingernails or pliers and pull rearward to

(4) Install replacement receptacle with the ground

remove lamp.

terminal oriented toward the top of the panel and secure

(3) Insert replacement lamp in lens assembly.

to the panel with the two mounting screws.

(4) Reinstall lens assembly to lamp socket.

(5) Reconnect leads to the three terminals.

g. Replacement of Lamp Socket XDS1.

(6) Place the VR monitor panel on the rack as

(1) Remove the VR monitor panel from the rack as

outlined in paragraph 330 below.

outlined in paragraph 328 above.

i. Replacement of Terminal Board TBI.

(2) Remove the lens assembly from the lamp socket

(1) Turn the ac power off to racks 4, 5, and 6.

by turning the knurled portion counterclockwise.

(2) Loosen the four captive screws holding the panel

(3) Slide insulation sleeving back over wires at rear

to the rack and carefully pull the panel away from the

of socket to expose solder joints. Tag leads according to

rack.

terminal destination.

(3) Remove the four screws retaining the plastic

(4) Unsolder leads from terminals.

protective cover on the rear of the panel to the support

(5) Using a 9/16inch open end wrench, loosen nut at

posts and remove the cover.

rear of lamp socket by turning counterclockwise.

(4) Transfer lead connections one at a time to

(6) At front of panel, turn retaining collar

replacement terminal board.

counterclockwise and unscrew from socket. Use pliers if

(5) Remove nuts and lockwashers from the four

necessary.

mounting studs and remove old terminal board.

(7) Remove rubber washer at front of panel.

Leave the marker strip in place against the panel.

(8) Remove lamp socket from panel.

(6)

Install replacement terminal strip on mounting

(9) On replacement socket, install retaining nut,

studs.

metal flat washer, and velotex washer (soft, lightcolored

(7) Reinstall the four sets of lockwashers and nuts.

washer) in that sequence, so that the velotex washer will

(8) Mount the plastic protective cover on the rear

be next to the panel surface.

panel and use the four screws to secure it in place.

(10) Insert replacement socket in panel and install

(9) Set the VR monitor panel in place on the front of

rubber washer at front of panel.

the rack and secure it in place with the four captive

(11) Face the flat side of the retaining collar toward

screws.

the front panel and screw clockwise onto the socket until

(10) Reenergize the power to racks 4, 5, and 6.

finger tight.

330. Replacement of Voltage Regulator Monitor Panel

SMD936692

CAUTION

a. Be sure the ac power is off to racks 4, 5, and 6.

Do not apply excessive force to the

b. Connect the six wires to the terminal board (TB

retaining nut, as excessive force will

severely deform the velotex washer.

c. Reinstall the protective plastic cover and secure

(12) At rear of panel, tighten retaining nut by turning

it to the mounting posts with the four screws.

clockwise with wrench.

d. Position the panel on the front of the rack and

(13) Install new lamp in lens assembly, if necessary,

tighten the four captive screws to secure it to the rack.

and reinstall lens assembly to lamp socket.

e. Reenergize the ac power.

(14) Replace the VR monitor panel on the rack as

outlined in paragraph 330 below.

Replacement of ac Receptacle J1.

(1) Remove VR monitor panel from the rack as

outlined in paragraph 328 above.

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