Chapter 1. FUNCTIONING OF TEST SET, RADIO AN/ARM-5A
Stage Analysis
Output Circuits
MODULATION Switch
Ratio Detector-Discriminator
Demodulator Circuits
Microphone and External Modulation Circuit
Figure 1-1. Power supply, schematic diagram.
Figure 1-2. Tone generator, schematic diagram.
Figure 1-3. MODULATION SWITCH, FUNCTIONAL DIAGRAM.
Figure 1-4. OMNI TRACK switch, functional diagram.
Figure 1-7. Reference channel limiter, schematic diagram.
Figure 1-9. Ratio detector-discriminator, schematic diagram.
Figure 1-10. Filter and resistance networks, schematic diagram.
Figure 1-11. Ratio network, schematic diagram.
Figure 1-12. Modulator, schematic diagram.
Figure 1-13. RF unit, schematic diagram.
Figure 1-14. RF meter circuit, schematic diagram
Figure 1-16. 1,000-cycle oscillator, schematic diagram.
Chapter 2. TROUBLESHOOTING - TM-11-6625-828-450024
Section II. TROUBLESHOOTING TEST SET, RADIO AN/ARM-5A
Use of Chart
Troubleshooting Chart. - TM-11-6625-828-450027
Troubleshooting Chart - continued - TM-11-6625-828-450028
Troubleshooting Chart - continued - TM-11-6625-828-450029
Figure 2-2. Front panel, top rear view.
Figure 2-3(1). Test set chassis, bottom view (part 1 of 2)
Figure 2-3(2). Test set chassis, bottom view (part 2 of 2)
Figure 2-4. Front panel, bottom rear view.
Chapter 3. REPAIRS AND ALIGNMENT
Figure 3-1. Location of major components and associated parts.
Figure 3-2. Tone generator, exploded view.
Figure 3-3. Tone generator, wiring diagram.
Removal and Replacement of RF Attenuator Assembly
Figure 3-4. RF unit, exploded view
Figure 3-5. RF unit, wiring diagram.
Removal and Replacement of RF Attenuator Assembly - continued
Figure 3-6. RF attenuator assembly, exploded view.
Figure 3-7. Lubrication of RF attenuator rack and spur gear assembly.
SECTION II. ALIGNMENT - TM-11-6625-828-450044
RF unit Alignment
Phase Angle Adjustment
Figure 3-8 (2). Location of alignment components, tone wheel generator.
90- to 150-cycle Phase and AMP LOC Alignment
Figure 3-9. Phase adjustment oscilloscope display.
Chapter 4. GENERAL SUPPORT TESTING PROCEDURE
Preliminary Inspection
Figure 4-1. Preliminary inspection test setup.
Procedure. - TM-11-6625-828-450053
RF Unit Test - TM-11-6625-828-450054
RF Unit Test - TM-11-6625-828-450055
Figure 4-2. RF unit test setup.
Power Supply Test
Figure 4-3. Power supply test setup.
RF Meter Adjustment Test - TM-11-6625-828-450059
Figure 4-4. Power supply test setup.
RF Meter Adjustment Test - TM-11-6625-828-450061
Figure 44 RF meter test setup.
%M Meter Test
Figure 4-5. . %M meter test setup.
30~ Phase Angle Test
Figure 4-6. 30~ phase angle test setup.
AMP LOCK Level Test
Figure 4-7. AMP LOC level test setup.
1000- Oscillator and Identifier Test
Figure 4-8. 1000~ oscillator and identifier test setup.
Overall Performance Test
Overall Performance Test - continued
Figure 4-9. Overall performance test setup.
Test Data Summary
Test Data Summary - continued
Figure 4-13. Color code marking for MIL-STD resistors.
Chapter 5. DEPOT OVERHAUL STANDARDS
Power Supply Test
Limiters Test
90-/150- Phase Test.
Operation Test
Operation Test - continued
Appendix A. REFERENCES - TM-11-6625-828-450083
Figure 4-10. Test Set, Radio AN/ARM-5A, block diagram.
Figure 4-11. Test Set, Radio AN/ARM-5A, schematic diagram.
Figure 4-12. Tube socket voltage and resistance diagram.
Figure 4-14. Color code marking for MIL-STD capacitors.
TM-11-6625-828-45 - index
Stage Analysis
Output Circuits
MODULATION Switch
Ratio Detector-Discriminator
Demodulator Circuits
Microphone and External Modulation Circuit
Figure 1-1. Power supply, schematic diagram.
Figure 1-2. Tone generator, schematic diagram.
Figure 1-3. MODULATION SWITCH, FUNCTIONAL DIAGRAM.
Figure 1-4. OMNI TRACK switch, functional diagram.
Figure 1-7. Reference channel limiter, schematic diagram.
Figure 1-9. Ratio detector-discriminator, schematic diagram.
Figure 1-10. Filter and resistance networks, schematic diagram.
Figure 1-11. Ratio network, schematic diagram.
Figure 1-12. Modulator, schematic diagram.
Figure 1-13. RF unit, schematic diagram.
Figure 1-14. RF meter circuit, schematic diagram
Figure 1-16. 1,000-cycle oscillator, schematic diagram.
Chapter 2. TROUBLESHOOTING - TM-11-6625-828-450024
Section II. TROUBLESHOOTING TEST SET, RADIO AN/ARM-5A
Use of Chart
Troubleshooting Chart. - TM-11-6625-828-450027
Troubleshooting Chart - continued - TM-11-6625-828-450028
Troubleshooting Chart - continued - TM-11-6625-828-450029
Figure 2-2. Front panel, top rear view.
Figure 2-3(1). Test set chassis, bottom view (part 1 of 2)
Figure 2-3(2). Test set chassis, bottom view (part 2 of 2)
Figure 2-4. Front panel, bottom rear view.
Chapter 3. REPAIRS AND ALIGNMENT
Figure 3-1. Location of major components and associated parts.
Figure 3-2. Tone generator, exploded view.
Figure 3-3. Tone generator, wiring diagram.
Removal and Replacement of RF Attenuator Assembly
Figure 3-4. RF unit, exploded view
Figure 3-5. RF unit, wiring diagram.
Removal and Replacement of RF Attenuator Assembly - continued
Figure 3-6. RF attenuator assembly, exploded view.
Figure 3-7. Lubrication of RF attenuator rack and spur gear assembly.
SECTION II. ALIGNMENT - TM-11-6625-828-450044
RF unit Alignment
Phase Angle Adjustment
Figure 3-8 (2). Location of alignment components, tone wheel generator.
90- to 150-cycle Phase and AMP LOC Alignment
Figure 3-9. Phase adjustment oscilloscope display.
Chapter 4. GENERAL SUPPORT TESTING PROCEDURE
Preliminary Inspection
Figure 4-1. Preliminary inspection test setup.
Procedure. - TM-11-6625-828-450053
RF Unit Test - TM-11-6625-828-450054
RF Unit Test - TM-11-6625-828-450055
Figure 4-2. RF unit test setup.
Power Supply Test
Figure 4-3. Power supply test setup.
RF Meter Adjustment Test - TM-11-6625-828-450059
Figure 4-4. Power supply test setup.
RF Meter Adjustment Test - TM-11-6625-828-450061
Figure 44 RF meter test setup.
%M Meter Test
Figure 4-5. . %M meter test setup.
30~ Phase Angle Test
Figure 4-6. 30~ phase angle test setup.
AMP LOCK Level Test
Figure 4-7. AMP LOC level test setup.
1000- Oscillator and Identifier Test
Figure 4-8. 1000~ oscillator and identifier test setup.
Overall Performance Test
Overall Performance Test - continued
Figure 4-9. Overall performance test setup.
Test Data Summary
Test Data Summary - continued
Figure 4-13. Color code marking for MIL-STD resistors.
Chapter 5. DEPOT OVERHAUL STANDARDS
Power Supply Test
Limiters Test
90-/150- Phase Test.
Operation Test
Operation Test - continued
Appendix A. REFERENCES - TM-11-6625-828-450083
Figure 4-10. Test Set, Radio AN/ARM-5A, block diagram.
Figure 4-11. Test Set, Radio AN/ARM-5A, schematic diagram.
Figure 4-12. Tube socket voltage and resistance diagram.
Figure 4-14. Color code marking for MIL-STD capacitors.
TM-11-6625-828-45 - index
