REMOVING AND REPLACING CONNECTORS AND CHASSIS COMPONENTS

TM 11-5805-387-34-2

2-12. REMOVING AND REPLACING CONNECTORS AND CHASSIS COMPONENTS

To gain access to chassis components, remove modem from chassis.

Stand modem on end for access to top and bottom of chassis.

CONNECTORS J1, J2, J3, J4

REMOVE

Remove printed circuit board A6 from compartment housing (para 2-10).

Remove hex nut (connectors J1, J2) or spanner nut (J3, J4) holding connector to front panel.

Carefully push connector out from inside the panel.

Connectors J3, J4: Tag, unsolder, and remove wires from connector.

Remove connector.

Connectors J1, J2: Unscrew rubber bushing retainer ring. Push the bushing back against wires, away

from connector, to expose solder terminals. Tag, unsolder, and remove wires from connector; remove

connector.

REPLACE

Solder wires to new connector.

Connectors J1 and J2: Replace screws on rubber bushing retainer ring.

Carefully push connector into front panel.

Replace hex nut (J1, J2) or spanner nut (J3, J4).

Replace printed circuit board A6 (para 2-10).

CONNECTORS J5, J6, J7, J8

REMOVE

Remove printed circuit board A8 from compartment housing (para 2-10).

Remove hex nut or spanner nut (J8) holding connector to front panel.

Carefully push connector out from inside of panel.

Unscrew rubber bushing retainer ring. Push the bushing back against wires, away from connector, to

expose solder terminals.

Tag, unsolder, and remove wires from connector; remove connector.

REPLACE

Solder wires to new connector.

Replace screws on rubber bushing retainer ring.

Carefully push connector into front panel.

Replace nut.

Replace printed circuit board A8 (para 2-10).

MODEM SWITCHES

The procedures in this section are for these switches:

S1 ONE WAY/DUPLEX

S6 AUTO MARX HOLD

S2 RECEIVE

S7 DC LOOP NO.1REMOVE

S3 METER FUNCTION

S8 DC LOOP NO.2

S4 MODE SELECTOR

S5 RCV/SEND

REMOVE

Tag, unsolder, and remove all wires connected to switch terminals.

On front panel remove control knob retainer screw or hex nut.

On inside of front panel remove any hex nuts.

Remove switch.

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