Removal and Replacement of Capacitor A7C1

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

Mount the new clamping block in position using the two screws, flat washers and lock washers removed in

step a.

Close and secure the front panel assembly.

5-13.

Removal and Replacement of Capacitor A7C1

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

4-7, respectively.

WARNING

Set ON/OFF switch to OFF before opening front panel assembly and removing circuit card assemblies.

High voltage is present in the power supply even when the ON/OFF switch is OFF. Remove the power

plug and discharge capacitors A7C1 and A5AlCl to ensure safety.

Make certain capacitors A7C1 and A5A1C1 (figures 5-5 and 5-6) are discharged. Remove the two screws

and washers which attach the leads to the capacitor. Disconnect the leads.

Remove the two nuts, flat washers and shoulder washers which attach the capacitor support clamps to the

bottom panel assembly (figure 5-5) and remove the capacitor. Remove the support clamps from the

capacitor.

Place the support clamps on the replacement capacitor so that the capacitor can be oriented with the plus

terminal toward the front of the chassis assembly. Install the capacitor leads removed in step h. Position and

secure the capacitor to the bottom panel assembly with the two nuts, washers and shoulder washers

removed in step c.

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

Close and secure the front panel assembly.

5-14.

Removal and Replacement of Rear Panel Assembly A5 and Backplane Circuit Card Assembly A5A1

Remove the power plug at A5J13 (figure 2-2). Remove the chassis cover and the four plug-in-circuit card

assemblies as described in paragraphs 5-6 and 4-7, respectively.

b..

Make certain that capacitors A7C1 and ASAlCl (figures 5-5 and 5-6) are discharged. Disconnect cables

connected at A5A1J5, A5A1J6, and A5A1J7 (figure 2-2). Cut the lockwire MS20995C-20 between the jam

nuts on the connectors ASA1J5, A5A1J6, and A5A1J7 (figure 5-4) and remove the jam nuts.

Remove the terminal board cover from A7TB1 (figure 5-5) and disconnect the three power connector

assembly leads at A7TB1-8,

5-16