Table 3-6. Resistor Values

TM 11-5895-1123-34

port, set the patch panel upside down with the face

toward the front.

that order) toward the front until they are out of the patch

(15) Secure the subpanels to the patch panel, by

panel frame.

inserting and tightening the 24 mounting screws to the

(7) Remove the screw holding the defective LED

face of the patch panel.

socket connector to the subpanel.

(16) Replace the patch panel back in the rack as

(8) Tag the wires connected to the LED socket

outlined in paragraph 322 below.

connector.

d. Replacement of Light Emitting Diodes (LED).

(9) If the wires are wire wrapped to the connectors,

cut the wires as close as possible to the connectors. If

CAUTION

the wires are soldered, unsolder them.

When removing the LED's take notice of

(10) Remove the LED socket connector from the

the lead positioning to ensure the

subpanel and replace it with the replacement LED socket

replacement LED is inserted in the same

connector.

manner.

(11) Prepare the wires for soldering and using good

(1) Grasp the defective LED by the plastic collar and

soldering practices, solder the wires back to the LED

pull forward until the LED clears the sleeve.

socket connectors.

(2) Position the replacement LED so the leads are in

(12) Insert and tighten the mounting screw into the

the same axis as those on the LED just removed.

rear of the subpanel to secure the LED socket connector

(3) Insert the replacement LED into the sleeve and

in place.

push rearward until contacts are in place.

(13) Gradually work the subpanels back into the

e. Replacement of LED Socket Connectors.

frame by inching the C, B, A, and D (in that order)

(1) Remove the communications TTY/low level

subpanels rearward until they are in their proper

patch panel from the rack as outlined in paragraph 320

positions.

above.

(14) While supporting the four subpanels, turn the

(2) Remove the LED as described in the paragraph

patch panel right side up with the face of the patch panel

above.

toward the front.

(3) Remove the 24 screws on the face of the patch

(15) Insert and tighten the 24 mounting screws into

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

the subpanels to secure them to the patch panel frame.

panel.

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

(4) While supporting the four subpanels, turn the

in paragraph 322 below.

patch panel face down with subpanels A and D towards

f. Test and Replacement of Resistors.

the front.

(1) Use the multimeter and measure resistance of

(5) Reach underneath the front panel and push

the resistors indicated in table 36. One end of the

upward on subpanels A, B, C, and D to dislodge them

resistor may have to be disconnected in order to get a

from the frame.

correct measurement.

If any resistor is defective,

(6) Gradually work the subpanels out of the patch

proceed to (2) below.

panel, by inching subpanels D, C, B, and A (in

Table 3-6. Resistor Values

Resistor

Value

Resistor

Value

Resistor

Value

10K + 1%

10K 1%

R17

10K 1%

10K + 1%

R10

2.49K + 1%

R18

10K 1%

R11

2.49K 1%

R19

10K 1%

R12

2.49K + 1%

R20

10K 1%

R13

10K 1%

R21

10K + 1%

10K 1%

R14

10K + 1%

R22

100 1%

10K + 1%

R15

10K 1%

R23

100 + 1%

10K 1%

R16

10K 1%

SUB PANEL

ALL

B Switch

680 5%

Resistors

(2) Remove the TTY/low level patch panel from its

paragraph 3-22 below.

rack as outlined in paragraph 3-20 above.

g. Replacement of Multipin Connectors.

(3) Unsolder the defective resistor.

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

(4) Using good soldering practices, solder a

the rack as outlined in paragraph 3-20 above.

replacement resistor of the same value into its place.

(2)

Follow the procedure outlined in paragraph

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

3-46