Removal and Replacement of Bottom Panel Assembly A7

TM 11-5895-1179-13 E132-EA-OMP-010/E106 KY883 TO 31S1-2GGSC-161

Reconnect the electronic signal connector assembly A8A2 to A6A1J2, and the interconnect cable assembly

Close and secure the front panel assembly.

5-24.

Removal and Replacement of Bottom Panel Assembly A7

a. Remove the chassis cover and the four plug-in-circuit card assemblies as described in paragraphs 5-6 and

4-7, respectively. Remove the interconnect cable assembly A8A3 (paragraph 5-19).

b. Make certain that capacitors A7C1 and A5A1CI (figures 5-5 and 5-6) are discharged. Remove the terminal

board covers from A7TB1 and A7TB2 and disconnect the leads at A7TB1-5, -6, -8 through -11 and A7TB2-2,

-4, -5, -8, -9, -11, -12, and -13.

c. Remove the five nuts and washers that hold the bottom panel assembly A7 to the chassis assembly A8

(figure 5-5) and remove the bottom panel assembly.

d. Lower the replacement bottom panel assembly onto the threaded studs of the chassis assembly and secure

with the five nuts and washers removed in step c.

e. Reconnect all 6 leads to A7TB2 and 8 leads to A7TB1 that were removed in step b (figure 5-2). Install the

terminal board covers removed from A7TB1 and A7TB2 in step b.

Install and reconnect the interconnect cable assembly A8A3 removed in step I (paragraph 5-19).

g. Install the four plug-in-circuit card assemblies (paragraph 4-7) and the chassis cover (figure 5-6).

h. Close and secure the front panel assembly.

5-25.

Removal and Replacement of Diode A7CR3

Remove the chassis cover and the four plug-in-circuit card assemblies as described in paragraphs 5-6 and

4-7, respectively.

Unsolder the diode A7CR3 to be replaced from A7E1 and A7E2 (figure 5-5) using standard heat sinking

techniques. Note the diode polarity before removing.

Remove the diode by breaking the adhesive bond between the diode and the mounting plate.

Apply adhesive 465-11, item 1, App. E to the replacement diode and install keeping the polarity noted in step

b. Solder in the replacement diode using standard heat sinking techniques.

Install the four plug-in-circuit card assemblies (paragraph 4-7) and the chassis cover (paragraph 5-6).

Close and secure the front panel assembly.

5-26.

Removal and Replacement of Diode A7CR4

Remove the chassis cover and the four plug-in-circuit card

5-24