TM-11-5820-498-35

• DS,GS, AND DEPOT MAINTENANCE MANUAL RADIO SETS AN/VRC-53, AN/VRC-64, AN/GRC-125 AND AN/GRC-160 AND AMPLIFIER-POWER SUPPLY GROUPS
• Direct Support, General Support, and Depot Maintenance Manual is changed as follows
• Direct Support, General Support, and Depot Maintenance Manual is changed as follows
• WARNING
• Table of Contents
• CHAPTER 1. INTRODUCTION
• Maintenance Forms, Records and Reports
• CHAPTER 2. CIRCUIT FUNCTIONING
• System Power Distribution, Including Crew-member Control Boxes
• AM1780/VRC MAIN PWR Switch at NORM Position.
• Receiver-Transmitter Control of Radio Transmission and Microphone Signal Distribution, including Crewmember Control Boxes
• Control, Intercommunication Set C-2297/VRC
• Control, Intercommunication Set C-2296/VRC
• Receiver-Transmitter Received Audio Signal Distribution, Including Crewmember Boxes
• Section II. RETRANSMISSION CIRCUIT FUNCTIONING
• Retransmission Using RT-505/PRC-25's or RT-841/PRG-77's
• Circuit Functioning-continued
• Section III. AMPLIFIER-POWER SUPPLY GROUP OA-3633(*)/GRC, CIRCUIT FUNCTIONING
• Figure 2-1. Amplifier-Power Supply AM-2060(*)/GRC, block diagram.
• Cable Assembly, Special Purpose, Electrical CS-4655/GRC
• CHAPTER 3. DS AND GS MAINTENANCE AMPLIFIER-POWER SUPPLY GROUP OA-3633(*) /GRC
• Connecting Dc Power to AM-2060(*) /GRC
• Figure 3-1. Fabrication of transmit and receive dummy load assemblies.
• Figure 3-2. View of MT-1029/VRC connector box with cover removed showing position of link.
• Section II. OA-3633(*)/GRC, TROUBLESHOOTING PROCEDURES
• Figure 3-4. Fabrication and connection of power distribution box.
• Troubleshooting Chart
• Continuity and Short Circuit Tests for Cable Assembly, Special Purpose, Electrical CX-4655/GRC
• AM-2060(*)/GRC, Isolating Troubles in Audio Amplifiers Q1 and Q2
• Figure 3-6. AM-2060(*)/GRC, front and rear panel connectors J2, J3, and J4, voltage and resistance indications.
• Figure 3-7. Test setup for isolating trouble in audio amplifiers Q1 and Q2.
• Figure 3-8. Test set-up for isolating troubles in voltage regulators Q3 and Q4
• Section III. OA-3633(*)GRC, PARTS REMOVAL AND REPLACEMENT PROCEDURES
• AM-2060(*)/GRC, ANT. FREQ. CONTROL Switch S2, Removal and Replacement
• Figure 3-11. AM-2060(*)IGRC, top view with plug-in assembly in place.
• Figure 3-13. AM-2060(*)/GRC, plug-in assembly front view, parts location.
• Figure 3-15. AM-2060(*)/GRC, plug-in assembly, exploded view.
• Figure 3-16. AM-2060(*), front panel, parts location.
• Figure 3-16.1. Installation of diode CR1.
• Section IV. OA-3633(*)/GRC, TESTING PROCEDURES
• Circuit Continuity and Resistance
• Figure 3-17. AM-2060(*)/GRC, test setup for output voltage tests
• Output Voltages Tests
• Procedure-continued
• Audio Amplifier Gain and Frequency Response Tests
• Figure 3-18. AM 2060(*)/GRC, test setup for amplifier audio gain and frequency response test
• Figur 3-19. AM-2060(*)/GRC, test setup for audio amplifier distortion test
• Audio Amplifier Distortion Test
• Circuit Breaker Test of PWR Switch
• Summary of Test Data-continued
• CHAPTER 4. DEPOT OVERHAUL STANDARDS
• APPENDIX A. REFERENCES
• APPENDIX A. REFERENCES-continued
• APPENDIX A. REFERENCES-continued
• Figure 4-1. Color code markings for MIL-STD resistors
• Schematic Drawing
• Schematic Drawing
• Schematic Drawing
• Schematic Drawing
• Schematic Drawing
• Schematic Drawing
• Schematic Drawing
• Schematic Drawing
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• TM-11-5820-498-35
• Distribution
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