Section IV. MAINTENANCE - TM-11-5820-873-340080

TM 11-5820-873-34

Section IV. MAINTENANCE

(3) Reinstall Regulator Assembly 1A6A1 (22) into

4-7. General

connector 1A6XA1 (18).

General support maintenance of the AN/URC-92 is limited

(4) Position rubber support (23) between

to the replacement and/or repair of wiring and connectors,

Regulator Assembly 1A6A1 (22) and Power Supply 1A6.

circuit card replacement and/or repair and the procedures

outlined in this manual.

CAUTION

4-8. Power Supply 1A6

Positive terminals of capacitors 1A6A1C5

(Fig 4-3)

and 1A6A1C9 must match positive markings

a. Removal.

on Regulator Board.

(1) Remove transceiver top cover.

(5) Position capacitors 1A6A1C5 (9) and

(2) Remove transceiver bottom cover.

1A6A1C9 (10) and secure each with two mounting screws

(3) Remove four screws holding Synthesizer 1A4

(4) and washers (5) through Regulator Assembly 1A6A1

protective cover and remove protective cover.

(22).

(4) Extract Spectrum Generator 1A4A1, Low Digit

(6) Reinstall two mounting screws (21) and

Generator 1A4A2, Translator 1A4A3, and VHF Divider

washers (19 & 20) in connector 1A6XA1 (18).

1A4A4 circuit card assemblies.

(7) Reinstall two standoffs (3) on Regulator

(5) Remove two screws and washers (16) holding

Assembly 1A6A1 (22).

Power Supply 1A6 to Synthesizer 1A4.

(8) Position Regulator Assembly 1A6A1

(6) Remove one screw and washer (15) mounting

protective cover (2) and secure with four screws (1).

power supply to chassis assembly.

(9) Position rear panel in place and secure with

(7) Remove two screws (17) mounting power

six mounting screws to left and right side panels.

supply to rear panel.

(10) Reinstall two power supply mounting screws

(8) Remove six screws mounting rear panel to

(17) through rear panel.

right and left side panels and pull away rear panel

(11) Reinstall one power supply mounting screw

(9) Remove four screws (1) from Regulator

(15) through chassis assembly.

Assembly 1A6A1 protective cover (2) and remove cover.

(12) Reinstall two power supply mounting screws

(10) Remove two standoffs (3) from Regulator

(16) through Synthesizer 1A4.

Assembly 1A6A1 (25).

CAUTION

(11) Remove four screws (4) and washers (5)

When reinstalling Spectrum Generator, Low

mounting capacitors 1A6AIC5 (9) and 1A6A1C9 (10) and

Digit Generator, Translator, and VHF Divider

remove capacitors.

circuit card assemblies, component side

(12) Remove two mounting screws (21) and

must face rear of transceiver.

washers (19 & 20) from connector 1A6XA1 (18).

(13) Reinstall Spectrum Generator 1A4A1, Low

(13) Extract Regulator Assembly 1A6A1 (22) from

Digit Generator 1A4A2, Translator 1A4A3, and VHF

connector 1A6XA1 (18).

Divider 1A4A4 circuit card assemblies.

(14) Remove two mounting screws (11) and

(14) Position Synthesizer 1A4 protective cover in

washers (12 & 13) from terminal board 1A6TB1 (14).

place and secure with four mounting screws.

NOTE

(15) Reinstall transceiver bottom cover.

Reposition terminal board 1A6TB1 to access

(16) Reinstall transceiver top cover.

screws mounting Power Supply 1A6 to

4-9. Power Transformer (1A6T1)

transformer 1A6T1.

(Fig 4-3)

(15) Remove four screws (8) and washers (7)

a. Removal.

mounting Power Supply 1A6 to Power Transformer 1A6T1

(1) Remove transceiver top cover

(6) and remove Power Supply.

(2) Remove transceiver bottom cover.

b. Replacement.

(3) Remove four screws (1) from Regulator

(1) Position Power Supply 1A6 in place and

Assembly 1A6A1 protective cover (2) and remove cover.

secure with four screws (8) and washers (7) to Power

(4) Remove two standoffs (3) from Regulator

Transformer 1A6 T1 (6).

Assembly 1A6A1 (22).

(2) Position terminal board 1A6TB1 (14) in place

(5) Remove two screws (4) and washers (5) from

and secure with two mounting screws (11) and washers

capacitor 1A6A1C5 (9) and remove capacitor.

(12 & 13).

(6) Remove two screws (4) and washers (5) from

CAUTION

capacitor 1A6A1C9 (12) and remove capacitor.

Component side of Regulator Assembly

(7) Remove two mounting screws (21) and

must face top of transceiver.

washers (19 & 20) from connector 1A6XA1 (21).

4-32