Figure 1-0. Amplifier-Converter AM-6879/URC, Receiver-Exciter RT-1209/URC, and Electrical Equipment Mounting Tray MT-4874/URC
Chapter 1. GENERAL INFORMATION
Figure 1-1. Typical Amplifier-Converter and Receiver/Exciter Vehicle-Mounted Configuration
Table 1-1. TECHNICAL CHARACTERISTICS
Table 1-2. Equipemnt Supplied
Table 1-3. TEST EQUIPMENT
Table 1-5. LIST OF PUBLICATIONS
Chapter 2. THEORY OF OPERATION
Transmit Operation
Figure 2-1. Functional Block Diagram
Section II. DETAILED FUNCTIONAL DESCRIPTION
Figure 2-2. EMI Filter A1A3A1 Detailed Block Diagram
Figure 2-3. Audio Filter A1A4A1 Detailed Block Diagram
Figure 2-4. Amplifier-Squelch A1A2 Detailed Block Diagram
SQUELCH ON/OFF switch S2
Receive Operation
Figure 2-5. TTY-FSK Converter A1A1 Detailed Block Diagram.
DC Loop
Figure 2-6. RFI Filter A1A4A2 Detailed Block Diagram.
Chapter 3. GENERAL MAINTENANCE DATA
Section I. CIRCUIT CARD ASSEMBLY REPAIR PROCEDURES
Figure 3-1. Void Standards
Figure 3-4. Cold Solder Joints
CIRCUIT CARD ETCH STANDARDS.
Table 3-1. RECOMMENDED TOOLS
Table 3-2. RECOMMENDED MATERIALS
ETCH REPAIR
Repair of Broken Gold-Plated Copper Etch
Repair of Raised or Unbended Gold-Plated Copper Etch
REMOVAL OF BONDED PARTS.
REMOVAL OF SOLDERED COMPONENTS HAVING AXIAL LEADS.
COMPONENT REPLACEMENT IN PLATED-THROUGH HOLES
REPAIR OF DAMAGED FIBER GLASS EPOXY PARTS
MODIFICATION OF SOLDER-PLATED PRINTED WIRING CIRCUIT CARDS
Figure 3-6. Coined 30-Gage Wire End
Figure 3-7. Single-Wire Attachment to Printed Circuit Pad
Figure 3-8. Double-Wire Attachment to Printed Circuit Pad
REPAIR OF BROKEN THERMAL MOUNTING PLATE POWER OR GROUND TABS.
Figure 3-9. Repair of Broken Thermal Mounting Plate Power or Ground Tabs
REPAIR OF CONCEALED SHORT CIRCUITS IN PRINTED WIRING ASSEMBLIES.
REPAIR OF THERMAL MOUNTING PLATE ON HIGH-DENSITY PRINTED WIRING BOARDS.
REPAIR OF DEFECTIVE PLATED-THROUGH HOLE
Section II. CLEANING AND EXAMINATION
EXAMINATION.
Section III. FABRICATION OF TEST CABLES
Figure 3-10. Fabrication of Test Cables and Adapters.
Figure 3-11. VM/RE Cable W1
Figure 3-12. Audio Cable W2
Section IV. PERFORMANCE TEST AND TROUBLESHOOTING - TM-11-5820-922-40-10069
Figure 3-13. Flowchart Symbology
Figure 3-14. Maintenance Chapter Construction
DESCRIPTION OF COMPONENT LOCATION DIAGRAMS
Chapter 4. AMPLIFIER-CONVERTER AM-6879/URC
Figure 4-1. Amplifier-Converter A1
Table 4-2. SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES
Section II. DISASSEMBLY AND REASSEMBLY
RIBBON CABLE REMOVAL
ADJUST POTENTIOMETER R2 REMOVAL
ADJUST POTENTIOMETER R2 REPLACEMENT
SPEAKER ASSEMBLY REPLACEMENT
AMPLIFIER-CONVERTER REAR COVER ASSEMBLY A1A3 REPLACEMENT
Section III. CLEANING AND EXAMINATION
Section IV. PERFORMANCE TEST AND TROUBLESHOOTING - TM-11-5820-922-40-10083
Section V. REPAIR AND REPLACEMENT
Section VI. COMPONENT LOCATION AND PARTS LIST
Figure 4-2. Amplifier-Converter A1 Schematic
Figure 4-3. Amplifier-Converter A1 Power Distribution
Repair Parts List - TM-11-5820-922-40-10089
Repair Parts List (cont) - TM-11-5820-922-40-10090
Repair Parts List (cont) - TM-11-5820-922-40-10091
Repair Parts List (cont) - TM-11-5820-922-40-10092
Figure 4-5. Amplifier-Converter Component Location (Ribbon Cable and Connectors)
Figure 4-6. Amplifier-Converter A1 Test Setup
Figure 4-7. Amplifier-Converter A1 Performance Test
Appendix A. REFERENCES - TM-11-5820-922-40-10096
TM-11-5820-922-40-1 Amplifier Converter AM-6879/URC (NSN5820-01-070-1950) Manual
Chapter 1. GENERAL INFORMATION
Figure 1-1. Typical Amplifier-Converter and Receiver/Exciter Vehicle-Mounted Configuration
Table 1-1. TECHNICAL CHARACTERISTICS
Table 1-2. Equipemnt Supplied
Table 1-3. TEST EQUIPMENT
Table 1-5. LIST OF PUBLICATIONS
Chapter 2. THEORY OF OPERATION
Transmit Operation
Figure 2-1. Functional Block Diagram
Section II. DETAILED FUNCTIONAL DESCRIPTION
Figure 2-2. EMI Filter A1A3A1 Detailed Block Diagram
Figure 2-3. Audio Filter A1A4A1 Detailed Block Diagram
Figure 2-4. Amplifier-Squelch A1A2 Detailed Block Diagram
SQUELCH ON/OFF switch S2
Receive Operation
Figure 2-5. TTY-FSK Converter A1A1 Detailed Block Diagram.
DC Loop
Figure 2-6. RFI Filter A1A4A2 Detailed Block Diagram.
Chapter 3. GENERAL MAINTENANCE DATA
Section I. CIRCUIT CARD ASSEMBLY REPAIR PROCEDURES
Figure 3-1. Void Standards
Figure 3-4. Cold Solder Joints
CIRCUIT CARD ETCH STANDARDS.
Table 3-1. RECOMMENDED TOOLS
Table 3-2. RECOMMENDED MATERIALS
ETCH REPAIR
Repair of Broken Gold-Plated Copper Etch
Repair of Raised or Unbended Gold-Plated Copper Etch
REMOVAL OF BONDED PARTS.
REMOVAL OF SOLDERED COMPONENTS HAVING AXIAL LEADS.
COMPONENT REPLACEMENT IN PLATED-THROUGH HOLES
REPAIR OF DAMAGED FIBER GLASS EPOXY PARTS
MODIFICATION OF SOLDER-PLATED PRINTED WIRING CIRCUIT CARDS
Figure 3-6. Coined 30-Gage Wire End
Figure 3-7. Single-Wire Attachment to Printed Circuit Pad
Figure 3-8. Double-Wire Attachment to Printed Circuit Pad
REPAIR OF BROKEN THERMAL MOUNTING PLATE POWER OR GROUND TABS.
Figure 3-9. Repair of Broken Thermal Mounting Plate Power or Ground Tabs
REPAIR OF CONCEALED SHORT CIRCUITS IN PRINTED WIRING ASSEMBLIES.
REPAIR OF THERMAL MOUNTING PLATE ON HIGH-DENSITY PRINTED WIRING BOARDS.
REPAIR OF DEFECTIVE PLATED-THROUGH HOLE
Section II. CLEANING AND EXAMINATION
EXAMINATION.
Section III. FABRICATION OF TEST CABLES
Figure 3-10. Fabrication of Test Cables and Adapters.
Figure 3-11. VM/RE Cable W1
Figure 3-12. Audio Cable W2
Section IV. PERFORMANCE TEST AND TROUBLESHOOTING - TM-11-5820-922-40-10069
Figure 3-13. Flowchart Symbology
Figure 3-14. Maintenance Chapter Construction
DESCRIPTION OF COMPONENT LOCATION DIAGRAMS
Chapter 4. AMPLIFIER-CONVERTER AM-6879/URC
Figure 4-1. Amplifier-Converter A1
Table 4-2. SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES
Section II. DISASSEMBLY AND REASSEMBLY
RIBBON CABLE REMOVAL
ADJUST POTENTIOMETER R2 REMOVAL
ADJUST POTENTIOMETER R2 REPLACEMENT
SPEAKER ASSEMBLY REPLACEMENT
AMPLIFIER-CONVERTER REAR COVER ASSEMBLY A1A3 REPLACEMENT
Section III. CLEANING AND EXAMINATION
Section IV. PERFORMANCE TEST AND TROUBLESHOOTING - TM-11-5820-922-40-10083
Section V. REPAIR AND REPLACEMENT
Section VI. COMPONENT LOCATION AND PARTS LIST
Figure 4-2. Amplifier-Converter A1 Schematic
Figure 4-3. Amplifier-Converter A1 Power Distribution
Repair Parts List - TM-11-5820-922-40-10089
Repair Parts List (cont) - TM-11-5820-922-40-10090
Repair Parts List (cont) - TM-11-5820-922-40-10091
Repair Parts List (cont) - TM-11-5820-922-40-10092
Figure 4-5. Amplifier-Converter Component Location (Ribbon Cable and Connectors)
Figure 4-6. Amplifier-Converter A1 Test Setup
Figure 4-7. Amplifier-Converter A1 Performance Test
Appendix A. REFERENCES - TM-11-5820-922-40-10096
TM-11-5820-922-40-1 Amplifier Converter AM-6879/URC (NSN5820-01-070-1950) Manual
