Electronic Frequency Converter 3A2 - TM-11-5820-695-350398

TM 11-5820-695-35

at front panel located adjacent to RF OUT J2 connector.

status panel 3A8. Bandpass filters 3A3 and 3A4 are

nonrepairable assemblies that are replaced at the direct

Remove two nuts screws and nuts that secure the

coaxial mixer to the chassis and remove the coaxial

support maintenance level (para 3-53.5).

mixer and isolator together.

4-11.2. Alarm-Monitor 3A1

(5) Remove rigid coaxial cable and connector

To gain access to alarm-monitor 3A1 printed wiring

plug from tunnel diode amplifier 3A2A1. Remove two

board assembly (fig. 5108) components remove four

panhead machine screws at front panel located adjacent

panhead screws at rear of frame and slide covers

to top portion of RF IN Waveguide flange and four

toward rear exposing wiring board assembly.

panhead machine screws and flat washers located at

bottom of electronic frequency converter chassis and

4-11.3. Electronic Frequency Converter 3A2

remove tunnel diode amplifier.

Depot repair of electronic frequency converter consists

b. Replacement. Replacement consist of-following

of replacement of defective parts. Exercise care when

the reverse order of removal instructions.

removing or replacing rigid coaxial cables. Detail

procedures are provided in TM 11-5820-695-12 for

4-11.4. Amplifier-Multiplier 3A5

removal and replacement of rigid coaxial cables.

Depot repairs to amplifier-multiplier 3A5 consist of

a. Removal.

To replace components in the

replacement of defective parts. Exercise care when

electronic frequency converter 3A2 proceed as follows:

removing or replacing rigid coaxial cables. Detail

(1) Remove two panhead screws at rear of

procedures are provided in TM 11-5820695-12 for

chassis and slide cover toward rear exposing electronics

removal and replacement of rigid coaxial cables.

frequency converter components.

(2) If required remove rigid coaxial cables

a. Removal.

To replace components in the

from component 'to be replaced.

amplifier-multiplier 3A5 (fig. 5110) proceed as follows:

(3) If required remove connector plug and

(1) Remove two panhead screws at rear of

attaching hardware from component to be replaced.

chassis and slide cover toward rear exposing amplifier-

multiplier components.

NOTE

(2) Remove screws and hardware that secure

The coaxial mixer 3A2A2 must be

current regulator 3A5A8 to post and chassis frame.

removed prior to or along with

(3) If replacement of current regulator 3ASA8

isolator 3A2AT2.

To remove the

is required carefully tag then unsolder leads connected

isolator 3A2AT2 perform step (4). To

to current regulator. If access to a component under

remove tunnel diode amplifier 3A2A1

current regulator is required carefully move current

perform step (5).

regulator aside so that wires are not damaged when

removing component.

(4) Remove rigid coaxial cables from coaxial

mixer 3A2A2 and remove two panhead machine screws

Change 6

4-6.1