Section III. MAINTENANCE PROCEDURES (Cont)

TM 11-5805-387-34-2

MODEM SWITCHES

S1 ONE WAY/DUPLEX

S2 RECEIVE

S3 METER FUNCTION

S4 MODE SELECTOR

S5 RCV/SEND

S6 AUTO MARK HOLD

S7 DC LOOP NO. 1

S8 DC LOOP NO. 2

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.

Carefully push switch out from outside of panel.

REPLACE

CAUTION

Wafer switch terminals are easily bent and broken. When Installing a new switch containing

wafers, carefully position wiring harness to prevent strain on switch terminals.

Place new switch Into position.

On Inside of front panel replace any hex nuts.

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

Solder wires to new switch terminals.

CIRCUIT BREAKER CB1

REMOVE

Tag, unsolder, and remove wires from circuit breaker terminals.

Remove hex nut on front panel ON/OFF switch.

Remove circuit breaker.

REPLACE

Place new circuit breaker into position.

Tighten hex nut on front panel.

Solder wires to circuit breaker terminals.

DIODES CR1-CR6

REMOVE

Tag, unsolder, and remove leads from diode.

Remove diode.

REPLACE

Position new diode.

Solder leads to new diode.

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