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Figure 4-3 Power Supply
Up
TM-11-5820-873-34 Radio Set AN/URC-92 (NSN
Next
Figure 4-4. Filter Module


TM 11-5820-873-34
Disconnect connector 1A1P3 from connector 1A4A6J1.
from Receiver/Exciter bottom shield and remove bottom
(9)  Remove  four  mounting  screws  from
shield.
Synthesizer Mother Board 1A4A6.
(7) Disconnect connector 1A1P2 from connector
(10) Remove two mounting screws and washers
1A3A5J5.
from Snythesizer coax bracket and remove bracket.
(8)  Remove  four  mounting  screws  from
(11) Label all wiring connections.
Receiver/Exciter Mother Board 1A3A5.
(12) Unsolder wires and remove Synthesizer
(9) Remove two mounting screws and washers
Mother Board 1A4A6.
from Receiver/Exciter Coax Bracket and remove bracket.
b. Replacement
(10) Label all wiring connections.
(11) Unsolder wires and remove Receiver/Exciter
(1) Make necessary wiring connections.
Mother Board 1A3A5.
(2) Position Synthesizer Coax Bracket m place
b. Replacement.
and secure with two mounting screws and washers.
(3) Position Synthesizer Mother Board 1A4A6 and
(1) Make necessary wiring connections.
secure with four mounting screws.
NOTE
(4) Reconnect connector 1A1P3 to connector
When  securing  Receiver/Exciter  Mother
1A4A6J1.
Board in place, two loop clamps are used to
(5) Position Synthesizer bottom shield in place
retain wiring.
and secure with four mounting screws.
(2)  Position  Receiver/Exciter  Mother  Board
NOTE
1A3A5 in place and secure with four mounting screws.
When installing Spectrum Generator, Low
(3) Position Receiver/Exciter Coax Bracket in
Digit Generator, Translator, and VHF Divider
place and secure with two mounting screws and washers.
circuit card assemblies, component side
(4) Reconnect connector 1A1P2 to connector
1A3A5J5.
must face rear of transceiver.
(5) Position Receiver/Exciter bottom shield in
(6) Reinstall Spectrum Generator 1A4A1, Low
place and secure with four mounting screws and washers.
Digit Generator 1A4A2, Translator 1A4A3, and VHF
Divider 1A4A4 circuit card assemblies.
NOTE
(7) Reinstall VCO 1A4A5 and secure with four
When installing Audio, Sideband Generator,
mounting screws and washers.
IF  Filter,  and  VHF  Mixer  circuit  card
(8) Position Front Panel in place and secure with
assemblies, components side must face
six mounting screws.
front of transceiver.
(9) Position Synthesizer top protective plate in
(6) Reinstall Audio 1A3A4, Sideband Generator
place and secure with four mounting screws.
1A3A3, IF Filter 1A3A2, VHF Mixer 1A3A1 circuit card
(10) Reinstall transceiver bottom cover.
assemblies.
(11) Reinstall transceiver top cover.
(7) Reinstall protective card shield.
4-13. Filter Module
(8) Position Receiver/Exciter top protective plate
in place and secure with four screws.
a. Removal.
(9) Replace transceiver bottom cover.
(1) Remove transceiver top cover.
(10) Replace transceiver top cover.
(2) Remove transceiver bottom cover.
4-12. Synthesizer Mother Board
(3) Disconnect connector 1A8P2 from connector
a. Removal.
1A5J1
(1) Remove transceiver top cover.
(4) Disconnect connector 1A8P4 from connector
(2) Remove transceiver bottom cover.
1A5J2.
(3)  Remove  four  mounting  screws  from
(5) Disconnect connector 1A3P4 from connector
Synthesizer top protective plate and remove plate.
1A5J3.
(4) Remove six mounting screws attaching front
(6) Disconnect connector 1A8P5 from connector
panel to transceiver and swing front panel downward.
1A5J4.
(5) Remove four mounting screws and washers
(7) Remove two mounting screws (3) from filter
from VCO 1A4A5 and extract VCO.
support bracket (2).
(6) Extract Spectrum Generator 1A4A1, Low Digit
(8) Remove two mounting screws (6) and washers
Generator 1A4A2, Translator 1A4A3, and VHF Divider
(5) from filter assembly cradle (4) and lift out Filter
1A4A4 circuit card assemblies.
Module 1A5 (1).
(7) Remove four mounting screws and washers
b. Replacement.
from Snythesizer bottom shield and remove shield (8)
4-35


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