TM 11-5820-890-30-4
CHAPTER 3
MAINTENANCE GROUP, ELECTRICAL EQUIPMENT
MAINTENANCE INSTRUCTIONS
Subject
OA-9297/GRC
Section
Principles of Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
Repair Parts, Special Tools, TMDE, and Support Equipment . . . . . . . . . . . . . . . . . . . . . . . II
Service Upon Receipt
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ill
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
Maintenance Procedures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VI
Preparation for Storage or Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VII
Section I. PRINCIPLES OF OPERATION
Subject
Para
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Receiver-Transmitter, Radio RT-1523(C)/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Amplifier-Adapter, Vehicular AM-7239/VRC or AM-7239B/VRC . . . . . . . . . . . . . . . . . . . . . 3-3
Mounting Base, Electrical Equipment MT-6352/VRC . . . . . . . . . . . . . . . . . . . . . .
3-4
Fill Device, Electronic Counter-Countermeasures MX-18290/VRC . . . . . . . . . . . . . . . . . . . 3-5
Transfer Device, Electrical KYK-13/TSEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Interconnecting Device J-4501/GRC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7
Test Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-8
3-1.
INTRODUCTION.
Page
3-1
3-20
3-20
3-24
3-25
3-87
3-111
Page
3-1
3-1
3-2
3-2
3-2
3-2
3-2
3-16
Maintenance Group OA-9297/GRC is used to test and troubleshoot the radio set components. It is made up of the
following:
Receiver-Transmitter, Radio RT-1523(C)/U
Amplifier-Adapter, Vehicular AM-7239/VRC or AM-7239B/VRC
Mounting Base, Electrical Equipment MT-6352/VRC
Fill Device, Electronic Counter-Countermeasures MX-18290/VRC
Transfer Device, Electrical KYK-13/TSEC
Interconnecting Device J-4501/GRC
The COEl list in Appendix C shows the items found in the maintenance group.
3-2.
RECEIVER-TRANSMlTTER, RADIO RT-1523(C)/U.
One RT-1523(C)/U is included with the maintenance group. The RT serves as a reference radio (REF RT) for
troubleshooting and operational check procedures. It functions as a receiver or transmitter when used to
troubleshoot other RTs. It helps test the operation of all RT modes: SC, FH, PT, CT, audio, and data. It is mounted
in the lower slot of the mounting adapter included in the maintenance group.
Operating instructions are in TM 11-5820-890-10-1. Unit maintenance instructions are in TM 11-5820-890-20-1.
If an RT is determined to be faulty, see chapter 2.
3-1
