Chapter 1. FUNCTIONING - TM-11-6625-821-450007
Functional Block Diagram Analysis
Detailed Functioning of Receiver Section
Figure 1-1. Simulator, Antenna SM-446/ARM-93, schematic diagram.
Interconnect circuitry
Figure 1-2. Inverter, Power, Static CV-2128/ARN-83, schematic diagram.
Figure 1-3. Cables, schematic diagram.
Function Control Circuit
Detailed Functioning of Loop Test Fixture
Function and Frequency Range Selection
Manual Audio Gain Control Circuit
Chapter 2. TROUBLESHOOTING - TM-11-6625-821-450019
Section II. TROUBLESHOOTING PROCEDURES
Troubleshooting Chart - TM-11-6625-821-450021
Troubleshooting Chart - continued - TM-11-6625-821-450022
Figure 2-1. Test unit, front panel.
Figure 2-2. Rear side of test set, front panel.
Figure 24. Cable simulator circuit.
Figure 2-5. Sense antenna adapter, internal view.
Figure 2-6. Loop test fixture, internal view.
Figure 2-8. Inverter voltage diagram.
Figure 2-10. Inverter, bottom view with bracket removed.
Figure 2-11. Loop antenna simulator circuit voltage diagram, with LOOP SIMULATOR set to OO.
LOOP SIMULATOR set to 90.
Chapter 3. REPAIRS AND ALIGNMENT - TM-11-6625-821-450033
Removal and Disassembly of Inverter
Removal of Test Set Front Panel
Reassembly and Replacement of Loop Simulator
Reassembly and Replacement of the Bearing Indicator
Figure 3-1. LOOP SIMULATOR, exploded view.
Section II. ALIGNMENT - TM-11-6625-821-450039
Inverter Load Adjust
LOOP SIMULATOR Impedance Adjustment
Adjustment of Inverter
Figure 3-5. Fabricated cable for the BEARING INDICATOR, construction details.
Chapter 4. GENERAL SUPPORT TESTING PROCEDURES AND DEPOT OVERHAUL STANDARDS
Test Facilities
Figure 4-2. Fabricated cable for the sense antenna adapter, construction details.
Inverter, Power, Static CV-2128/ARN-83 Physical Tests and Inspection
Figure 4-4. Inverter test.
Inverter Test
Control, Directional Finder C-6899/ARN-83 Physical Tests and Inspection
Figure 4-5. Control unit test setup.
Control Unit Test - TM-11-6625-821-450055
Test Fixture, Loop Antenna MT-3667/ARN-93 Physical Tests and Inspection
Figure 4-6. Loop test fixture test setup.
Loop Test Fixture Test
Simulator, Antenna SM-446/ARN-93 Physical Tests and Inspection
Figure 4-7 Sense antenna adapter test setup.
Sense Antenna Adapter Test
Procedure
Test Set, Radio TS-2502/ARN-93 Physical Tests and Inspection
Figure 4-8. Test set receiver circuitry test setup.
Test Set Receiver Circuitry Test
Figure 4-9. LOOP SIMULATOR resolver test set up.
LOOP SIMULATOR Resolver Test
Figure 4-10. LOOP SIMULATOR impedance test setup.
LOOP SIMULATOR Impedance Test
Figure 4-11. LOOP SIMULATOR output test.
LOOP SIMULATOR output test.
Summary of Test Data for General Support Testing Procedures and Depot Overhaul Standards
Loop Test Fixture
Loop Simulator Output
Figure 4-12. Color code marking for MIL-STD resistors.
Chapter 5. ILLUSTRATIONS - TM-11-6625-821-450077
Figure 5-2. Test Set, Directional Finder Set AN/ARM-93, Overall Functional Block Diagram
Figure 5-4. Power Circuit, Schematic Diagram
Figure 5-7. Circuit for Checking Manual LOOP Control Circuit, Schematic Diagram
Figure 5-8. Circuits For Checking bfo, rf Gain Control and Audio Gain Control, Schematic Diagram
Figure 5-8. Circuits for Checking Function Control, Schematic Diagram
Figure 5-10. Circuit for Checking Range Control, Schematic Diagram
Figure 5-12. Tuning Control Circuit, Schematic Diagram
Figure 5-13. Manual LOOP Control Circuit, Schematic Diagram
Figure 5-14. Manual Audio Gain Control Circuit, Schematic Diagram
Figure 5-15. Manual RF Gain Control Circuit, Schematic Diagram
Figure 5-16. Bfo switching and tuning meter circuits, schematic diagram
Distribution - TM-11-6625-821-450092
Figure 5-1. Color-code marking for MIL-STD capacitors.
Figure 5-3. Test Set, Radio TS-2502/ARM-93, schematic diagram.
Figure 5-5. Control, Direction Finder C-6899-ARN-83,schematic diagram
Figure 5-6. Circuits for checking tuning meter and tuning control information, schematic diagram.
Schematic Diagram - TM-11-6625-821-450098
TM-11-6625-821-45 Test Set Direction Finder Set AN/ARM-93 Manual
Functional Block Diagram Analysis
Detailed Functioning of Receiver Section
Figure 1-1. Simulator, Antenna SM-446/ARM-93, schematic diagram.
Interconnect circuitry
Figure 1-2. Inverter, Power, Static CV-2128/ARN-83, schematic diagram.
Figure 1-3. Cables, schematic diagram.
Function Control Circuit
Detailed Functioning of Loop Test Fixture
Function and Frequency Range Selection
Manual Audio Gain Control Circuit
Chapter 2. TROUBLESHOOTING - TM-11-6625-821-450019
Section II. TROUBLESHOOTING PROCEDURES
Troubleshooting Chart - TM-11-6625-821-450021
Troubleshooting Chart - continued - TM-11-6625-821-450022
Figure 2-1. Test unit, front panel.
Figure 2-2. Rear side of test set, front panel.
Figure 24. Cable simulator circuit.
Figure 2-5. Sense antenna adapter, internal view.
Figure 2-6. Loop test fixture, internal view.
Figure 2-8. Inverter voltage diagram.
Figure 2-10. Inverter, bottom view with bracket removed.
Figure 2-11. Loop antenna simulator circuit voltage diagram, with LOOP SIMULATOR set to OO.
LOOP SIMULATOR set to 90.
Chapter 3. REPAIRS AND ALIGNMENT - TM-11-6625-821-450033
Removal and Disassembly of Inverter
Removal of Test Set Front Panel
Reassembly and Replacement of Loop Simulator
Reassembly and Replacement of the Bearing Indicator
Figure 3-1. LOOP SIMULATOR, exploded view.
Section II. ALIGNMENT - TM-11-6625-821-450039
Inverter Load Adjust
LOOP SIMULATOR Impedance Adjustment
Adjustment of Inverter
Figure 3-5. Fabricated cable for the BEARING INDICATOR, construction details.
Chapter 4. GENERAL SUPPORT TESTING PROCEDURES AND DEPOT OVERHAUL STANDARDS
Test Facilities
Figure 4-2. Fabricated cable for the sense antenna adapter, construction details.
Inverter, Power, Static CV-2128/ARN-83 Physical Tests and Inspection
Figure 4-4. Inverter test.
Inverter Test
Control, Directional Finder C-6899/ARN-83 Physical Tests and Inspection
Figure 4-5. Control unit test setup.
Control Unit Test - TM-11-6625-821-450055
Test Fixture, Loop Antenna MT-3667/ARN-93 Physical Tests and Inspection
Figure 4-6. Loop test fixture test setup.
Loop Test Fixture Test
Simulator, Antenna SM-446/ARN-93 Physical Tests and Inspection
Figure 4-7 Sense antenna adapter test setup.
Sense Antenna Adapter Test
Procedure
Test Set, Radio TS-2502/ARN-93 Physical Tests and Inspection
Figure 4-8. Test set receiver circuitry test setup.
Test Set Receiver Circuitry Test
Figure 4-9. LOOP SIMULATOR resolver test set up.
LOOP SIMULATOR Resolver Test
Figure 4-10. LOOP SIMULATOR impedance test setup.
LOOP SIMULATOR Impedance Test
Figure 4-11. LOOP SIMULATOR output test.
LOOP SIMULATOR output test.
Summary of Test Data for General Support Testing Procedures and Depot Overhaul Standards
Loop Test Fixture
Loop Simulator Output
Figure 4-12. Color code marking for MIL-STD resistors.
Chapter 5. ILLUSTRATIONS - TM-11-6625-821-450077
Figure 5-2. Test Set, Directional Finder Set AN/ARM-93, Overall Functional Block Diagram
Figure 5-4. Power Circuit, Schematic Diagram
Figure 5-7. Circuit for Checking Manual LOOP Control Circuit, Schematic Diagram
Figure 5-8. Circuits For Checking bfo, rf Gain Control and Audio Gain Control, Schematic Diagram
Figure 5-8. Circuits for Checking Function Control, Schematic Diagram
Figure 5-10. Circuit for Checking Range Control, Schematic Diagram
Figure 5-12. Tuning Control Circuit, Schematic Diagram
Figure 5-13. Manual LOOP Control Circuit, Schematic Diagram
Figure 5-14. Manual Audio Gain Control Circuit, Schematic Diagram
Figure 5-15. Manual RF Gain Control Circuit, Schematic Diagram
Figure 5-16. Bfo switching and tuning meter circuits, schematic diagram
Distribution - TM-11-6625-821-450092
Figure 5-1. Color-code marking for MIL-STD capacitors.
Figure 5-3. Test Set, Radio TS-2502/ARM-93, schematic diagram.
Figure 5-5. Control, Direction Finder C-6899-ARN-83,schematic diagram
Figure 5-6. Circuits for checking tuning meter and tuning control information, schematic diagram.
Schematic Diagram - TM-11-6625-821-450098
TM-11-6625-821-45 Test Set Direction Finder Set AN/ARM-93 Manual
