TM-11-5820-401-34-3

• DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL RADIO SETS AN/VRC-12
• SAFETY STEPS
• WARNING
• WARNING-continued
• Table of Contents
• Table of Contents-continued
• HOW TO USE THIS MANUAL
• RECEIVER R-442(*)/VRC
• CHAPTER 1. INTRODUCTION
• MAINTENANCE FORMS, RECORDS, AND REPORTS.
• NOMENCLATURE CROSS-REFERENCE LIST.
• DIFFERENCES BETWEEN MODELS/SILICON VERSIONS.
• SAFETY, CARE, AND HANDLING.
• Section III PRINCIPLES OF OPERATION
• RECEIVER SIGNAL PATH-continued
• LOCAL OSCILLATOR AFC/CRYSTAL REFERENCE SYSTEM.
• CRS BALANCED MIXER A3200.
• CRS BALANCED MIXER A3200-continued
• CRS SECOND MIXER A3300 AND CRYSTAL SWITCH A2000.
• CRYSTAL SWITCH A2000
• SECOND MIXER AND CRYSTAL SWITCH OPERATING EXAMPLE
• CRS FIRST AND SECOND IF AMP A3400/CRS THIRD IF AMP AND LIMITER A3500.
• CRS HUNT DISCRIMINATOR A3600, CRS PHASE DISCRIMINATOR A3700, AND REFERENCE OSCILLATOR A2000.
• PHASE DISCRIMINATOR
• HUNT DISCRIMINATOR, PHASE DISCRIMINATOR; REFERENCE OSCILLATOR - WORKING EXAMPLE - LOCAL OSCILLATOR AT CORRECT FREQUENCY
• HUNT DISCRIMINATOR, PHASE DISCRIMINATOR; REFERENCE OSCILLATOR - WORKING EXAMPLE - LOCAL OSCILLATOR RUNNING TOO HIGH
• ANTENNA TUNING AND PROTECTION MODULE A1100.
• FIRST RF AMPLIFIER MODULE A1200.
• MIXER AND BUFFER AMPLIFIER A1400.
• LOCAL OSCILLATORA 1500.
• FIRST AND SECOND IF AMPLIFIER A4100.
• THIRD, FOURTH, AND FIFTH IF AMPLIFIER, LIMITER, AND DISCRIMINATOR A4200 - GERMANIUM TRANSISTOR VERSION.
• THIRD IF AMPLIFIER, LIMITER AND DISCRIMINATOR A4200A - SILICON TRANSISTOR VERSION
• AUDIO AMPLIFICATION/A5000.
• RECEIVER SQUELCH FUNCTION.
• SQUELCH Switch
• Squelch Filter
• CHAPTER 2. DIRECT SUPPORT REPAIR PROCEDURES
• Section II DIRECT SUPPORT TROUBLESHOOTING
• EQUIPMENT INSTRUCTIONS
• ORGANIZATION OF TROUBLESHOOTING CHARTS.
• GENERATION OF TROUBLESHOOTING CHARTS
• Section III DIRECT SUPPORT MAINTENANCE PROCEDURES
• TOP AND BOTTOM COVER REPLACEMENT.
• FRONT PANEL REPLACEMENT.
• REMOVAL-continued
• REMOVAL-continued
• INSTALLATION
• INSTALLATION-continued
• INSTALLATION-continued
• INSTALLATION-continued
• A1000 ASSEMBLY REPLACEMENT.
• INSTALLATION
• FOLLOW-ON MAINTENANCE
• MODULES A1100 THROUGH A1500 REPLACEMENT.
• REMOVAL-continued
• INSTALLATION
• FOLLOW-ON MAINTENANCE
• A1600 ASSEMBLY REPLACEMENT.
• INSTALLATION
• POWER SWITCH/CIRCUIT BREAKER CB101 REPLACEMENT.
• SQUELCH SWITCH S102 REPLACEMENT.
• VOLUME CONTROL R101 REPLACEMENT.
• LIGHT SWITCH S101 REPLACEMENT.
• AUDIO CONNECTOR J103 AND J104 REPLACEMENT
• A3000 MODULE AND ASSEMBLY REPLACEMENT.
• REMOVAL-continued
• INSTALLATION
• INSTALLATION-continued
• INSTALLATION-continued
• FOLLOW-ON MAINTENANCE
• A4000 MODULE AND ASSEMBLY REPLACEMENT
• REMOVAL-continued
• INSTALLATION
• INSTALLATION-continued
• INSTALLATION-continued
• FOLLOW-ON MAINTENANCE
• A5000 MODULE AND ASSEMBLY REPLACEMENT.
• REMOVAL-continued
• INSTALLATION
• INSTALLATION-continued
• INSTALLATION-continued
• FOLLOW-ON MAINTENANCE
• CHAPTER 3. DIRECT SUPPORT PERFORMANCE AND TROUBLESHOOTING PROCEDURES USING MAINTENANCE KIT MK.1978/VRC AND DISCRETE TEST EQUIPMENT (TMDE)
• VOLUME CONTROL TEST.
• CONTROL AND SWITCH SETTINGS
• RECEIVER SENSITIVITY TEST.
• INITIAL EQUIPMENT CONTROL SETTINGS
• TEST PROCEDURE
• Sensitivity Test at 53.00 MHz
• NEW SQUELCH TEST.
• TEST SETUP
• TEST PROCEDURE
• NEW SQUELCH Test at 41.00 MHz
• OLD SQUELCH TEST.
• TEST SETUP
• TEST PROCEDURE
• OLD SQUELCH Test at 41.00 MHz
• RECEIVER AUDIO POWER TEST.
• CONTROL AND SWITCH SETTINGS
• RECEIVER AUDIO DISTORTION TEST.
• TEST SETUP
• CONTROL AND SWITCH SETTINGS
• RECEIVER AUDIO RESPONSE TEST (NORMAL MODE).
• INITIAL EQUIPMENT CONTROL SETTINGS
• TEST PROCEDURE
• Audio Response Test (Normal Mode) at 1 kHz
• RECEIVER AUDIO RESPONSE TEST (X-MODE).
• INITIAL EQUIPMENT CONTROL SETTINGS
• TEST PROCEDURE
• Audio Response Test (X-Mode) at 500 Hz
• RECEIVER SELECTIVITY TEST.
• TEST SETUP
• TEST PROCEDURE
• STANDARD. R-442/VRC CALL lamp should remain lit.
• Section II TROUBLESHOOTING
• GROSS TROUBLESHOOTING PRELIMINARY INSTRUCTIONS.
• INTERPOLATION OSCILLATOR CRYSTAL CHART
• TROUBLESHOOTING FLOW CHARTS.
• CHART 3-1. No Audio Troubleshooting (Sheet 2 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 3 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 4 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 5 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 6 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 7 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 8 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 9 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 10 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 11 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 12 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 13 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 14 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 15 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 16 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 17 of 18)
• CHART 3-1. No Audio Troubleshooting (Sheet 18 of 18)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 1 of 7)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 2 of 7)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 3 of 7)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 4 of 7)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 5 of 7)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 6 of 7)
• CHART 3-2. SINAD Test Failure Troubleshooting (Sheet 7 of 7)
• CHART 3-3. Squelch Test Failure Troubleshooting (Sheet 1 of 2)
• CHART 3-3. Squelch Test Failure Troubleshooting (Sheet 2 of 2)
• CHART 3-4. Audio Distortion Test Failure Troubleshooting (Sheet 1 of 1)
• CHART 3-5. Audio Response Test Failure (Normal Mode) Troubleshooting (Sheet 1 of 1)
• CHART 3-6. Selectivity Test Failure Troubleshooting (Sheet 1 of 1)
• CHART 3-7. A1000 Assembly Troubleshooting (Sheet 1 of 5)
• CHART 3-7. A1000 Assembly Troubleshooting (Sheet 2 of 5)
• CHART 3-7. A1000 Assembly Troubleshooting (Sheet 3 of 5)
• CHART 3-7. A1000 Assembly Troubleshooting (Sheet 4 of 5)
• CHART 3-7. A1000 Assembly Troubleshooting (Sheet 5 of 5)
• CHART 3-8. A2000, A3000 Assemblies Troubleshooting (Sheet 1 of 6)
• CHART 3-8. A2000, A3000 Assemblies Troubleshooting (Sheet 2 of 6)
• CHART 3-8. A2000, A3000 Assemblies Troubleshooting (Sheet 3 of 6)
• CHART 3-8. A2000, A3000 Assemblies Troubleshooting (Sheet 4 of 6)
• CHART 3-8. A2000, A3000 Assemblies Troubleshooting (Sheet 5 of 6)
• CHART 3-8. A2000, A3000 Assemblies Troubleshooting (Sheet 6 of 6)
• CHART 3-9. A4000 Assembly Troubleshooting (Sheet 1 of 3)
• CHART 3-9. A4000 Assembly Troubleshooting (Sheet 2 of 3)
• CHART 3-9. A4000 Assembly Troubleshooting (Sheet 3 of 3)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 1 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 2 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 3 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 4 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 5 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 6 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 7 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 8 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 9 of 10)
• CHART 3-10. A5000 Assembly Troubleshooting (Sheet 10 of 10)
• Section III ALINEMENT AND ADJUSTMENT PROCEDURES
• CRYSTAL REFERENCE SYSTEM (CRS) TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE-continued
• LOCAL OSCILLATOR A1500 ALINEMENT.
• INITIAL EQUIPMENT CONTROL SETTINGS
• ALINEMENT PROCEDURE
• LOCAL OSCILLATOR A1500 ALTERNATE ALINEMENT PROCEDURE.
• TUNER A1000 ALINEMENT.
• TUNER A1000 ALINEMENT.
• ALINEMENT PROCEDURE
• 52-MHz Test
• IF DISCRIMINATOR A4200 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• SILICON VERSION IF DISCRIMINATOR A4200A ALINEMENT.
• TEST SETUP
• ALINEMENT PROCEDURE
• AUDIO AND SQUELCH PREAMPLIFIER A4300 ALINEMENT.
• ALINEMENT PROCEDURE
• SILICON VERSION AUDIO AND SQUELCH PREAMPLIFIER A4300A ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• A5300 SQUELCH FILTER ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE-continued
• SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• A5200 SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS
• SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• A5200 SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
• TEST SETUP
• CONTROL AND SWITCH SETTINGS-continued
• ALINEMENT PROCEDURE
• CHAPTER 4. DIRECT SUPPORT PERFORMANCE AND TROUBLESHOOTING PROCEDURES USING TEST SET AN/GRM-114A
• Section I PERFORMANCE TESTS
• VOLUME CONTROL TEST-continued
• TEST PROCEDURE
• RECEIVER SENSITIVITY TEST.
• CONTROL AND SWITCH SETTINGS
• Sensitivity Test at 30.00 MHz
• NEW SQUELCH TEST.
• TEST PROCEDURE
• NEW SQUELCH Test at Other Frequencies
• OLD SQUELCH TEST.
• CONTROL AND SWITCH SETTINGS
• OLD SQUELCH Test at 30.00 MHz
• RECEIVER AUDIO POWER TEST.
• CONTROL AND SWITCH SETTINGS
• RECEIVER AUDIO DISTORTION TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE
• RECEIVER AUDIO RESPONSE TEST (NORMAL MODE).
• CONTROL AND SWITCH SETTINGS
• Audio Response Test (Normal Mode) Modulating Frequencies
• RECEIVER AUDIO RESPONSE TEST(X-MODE).
• TEST SETUP
• TEST PROCEDURE
• Audio Response Test (X-Mode) at Other Modulating Frequencies
• RECEIVER SELECTIVITY TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE
• TEST PROCEDURE-continued
• Section II TROUBLESHOOTING
• GROSS TROUBLESHOOTING PRELIMINARY INSTRUCTIONS.
• INTERPOLATION OSCILLATOR CRYSTAL CHART
• TROUBLESHOOTING FLOW CHARTS.
• CHART 4-1. NO Audio Troubleshooting (Sheet 2 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 3 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 4 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 5 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 6 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 7 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 8 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 9 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 10 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 11 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 12 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 13 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 14 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 15 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 16 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 17 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 18 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 19 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 20 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 21 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 22 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 23 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 24 of 25)
• CHART 4-1. NO Audio Troubleshooting (Sheet 25 of 25)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 1 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 2 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 3 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 4 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 5 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 6 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 7 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 8 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 9 of 10)
• CHART 4-2. A4000 Assembly Troubleshooting (Sheet 10 of 10)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 1 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 2 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 3 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 4 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 5 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 6 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 7 of 8)
• CHART 4-3. SINAD Test Failure Troubleshooting A1000 Assembly (Sheet 8 of 8)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 1 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 2 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 3 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 4 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 5 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 6 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 7 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 8 of 9)
• CHART 4-4. SINAD Test Failure Troubleshooting A2000, A3000 Assemblies (Sheet 9 of 9)
• CHART 4-5. Squelch Test Failure Troubleshooting (Sheet 1 of 2)
• CHART 4-5. Squelch Test Failure Troubleshooting (Sheet 2 of 2)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 1 of 7)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 2 of 7)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 3 of 7)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 4 of 7)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 5 of 7)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 6 of 7)
• CHART 4-6. Audio Power Test Failure Troubleshooting (Sheet 7 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 1 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 2 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 3 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 4 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 5 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 6 of 7)
• CHART 4-7. Audio Distortion Test Failure Troubleshooting (Sheet 7 of 7)
• CHART 4-8. Audio Response Test Failure (X-Mode) Troubleshooting (Sheet 1 of 4)
• CHART 4-8. Audio Response Test Failure (X-Mode) Troubleshooting (Sheet 2 of 4)
• CHART 4-8. Audio Response Test Failure (X-Mode) Troubleshooting (Sheet 3 of 4)
• CHART 4-8. Audio Response Test Failure (X-Mode) Troubleshooting (Sheet 4 of 4)
• CHART 4-9. Audio Response Test Failure (Normal Mode) Troubleshooting (Sheet 1 of 2)
• CHART 4-9. Audio Response Test Failure (Normal Mode) Troubleshooting (Sheet 2 of 2)
• CHART 4-10. Selectivity Test Failure Troubleshooting (Sheet 1 of 11)
• Section III ALINEMENT AND ADJUSTMENT PROCEDURES
• CRYSTAL REFERENCE SYSTEM (CRS) TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE
• TEST PROCEDURE-continued
• LOCAL OSCILLATOR A1500 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• Schematic Drawing
• ALINEMENT PROCEDURE
• TUNER A1000 ALINEMENT.
• ALINEMENT PROCEDURE
• ALINEMENT PROCEDURE-continued
• IF DISCRIMINATOR A4200 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION IF DISCRIMINATOR A4200A ALINEMENT.
• CONTROL AND SWITCH SETTINGS-continued
• AUDIO AND SQUELCH PREAMPLIFIER A4300 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION AUDIO AND SQUELCH PREAMPLIFIER A4300A ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• A5300 SQUELCH FILTER ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• CONTROL AND SWITCH SETTINGS-continued
• ALINEMENT PROCEDURE
• SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• A5200 SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS-continued
• SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• A5200 SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• CHAPTER 5. DIRECT SUPPORT PERFORMANCE AND TROUBLESHOOTING PROCEDURES USING TEST CABLE NO. 1 AND DISCRETE TEST EQUIPMENT (TMDE)
• VOLUME CONTROL TEST.
• CONTROL AND SWITCH SETTINGS
• RECEIVER SENSITIVITY TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE
• Sensitivity Test at 53.00 MHz
• NEW SQUELCH TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE
• NEW SQUELCH Test at 41.00 MHz
• OLD SQUELCH TEST.
• CONTROL AND SWITCH SETTINGS
• OLD SQUELCH Test at 41.00 MHz
• RECEIVER AUDIO POWER TEST.
• TEST SETUP
• CONTROL AND SWITCH SETTINGS
• RECEIVER AUDIO DISTORTION TEST.
• TEST SETUP
• CONTROL AND SWITCH SETTINGS
• RECEIVER AUDIO RESPONSE TEST (NORMAL MODE)
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE
• Audio Response Test (Normal Mode) at 500 Hz
• RECEIVER AUDIO RESPONSE TEST (X.-MODE).
• TEST SETUP
• CONTROL AND SWITCH SETTINGS
• Audio Response Test (X-Mode) at 1 kHz
• Audio Response Test (X-Mode) at 5 kHz
• RECEIVER SELECTIVITY TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE-continued
• TEST PROCEDURE-continued
• Section II TROUBLESHOOTING
• GROSS TROUBLESHOOTING PRELIMINARY INSTRUCTIONS.
• INTERPOLATION OSCILLATOR CRYSTAL CHART
• TROUBLESHOOTING FLOW CHARTS.
• CHART 5-1. No Audio Troubleshooting (Sheet 2 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 3 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 4 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 5 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 6 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 7 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 8 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 9 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 10 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 11 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 12 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 13 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 14 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 14 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 16 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 17 of 18)
• CHART 5-1. No Audio Troubleshooting (Sheet 18 of 18)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 1 of 7)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 2 of 7)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 3 of 7)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 4 of 7)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 5 of 7)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 6 of 7)
• CHART 5-2. SINAD Test Troubleshooting (Sheet 7 of 7)
• CHART 5-3. Squelch Test Failure Troubleshooting (Sheet 1 of 2)
• CHART 5-3. Squelch Test Failure Troubleshooting (Sheet 2 of 2)
• CHART 5-4. Audio Distortion Test Failure Troubleshooting (Sheet 1 of 1)
• CHART 5-5. Audio Response Test Failure (Normal Mode) Troubleshooting (Sheet 1 of 1)
• CHART 5-6. Selectivity Test Failure Troubleshooting (Sheet 1 of 1)
• CHART 5-7. A1000 Assembly Troubleshooting (Sheet 1 of 5)
• CHART 5-7. A1000 Assembly Troubleshooting (Sheet 2 of 5)
• CHART 5-7. A1000 Assembly Troubleshooting (Sheet 3 of 5)
• CHART 5-7. A1000 Assembly Troubleshooting (Sheet 4 of 5)
• CHART 5-7. A1000 Assembly Troubleshooting (Sheet 5 of 5)
• CHART 5-8. A2000, A3000 Assemblies Troubleshooting (Sheet 1 of 6)
• CHART 5-8. A2000, A3000 Assemblies Troubleshooting (Sheet 2 of 6)
• CHART 5-8. A2000, A3000 Assemblies Troubleshooting (Sheet 3 of 6)
• CHART 5-8. A2000, A3000 Assemblies Troubleshooting (Sheet 4 of 6)
• CHART 5-8. A2000, A3000 Assemblies Troubleshooting (Sheet 5 of 6)
• CHART 5-8. A2000, A3000 Assemblies Troubleshooting (Sheet 6 of 6)
• CHART 5-9. A4000 Assembly Troubleshooting (Sheet 1 of 3)
• CHART 5-9. A4000 Assembly Troubleshooting (Sheet 2 of 3)
• CHART 5-9. A4000 Assembly Troubleshooting (Sheet 3 of 3)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 1 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 2 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 3 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 4 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 5 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 6 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 7 of 8)
• CHART 5-10. A5000 Assembly Troubleshooting (Sheet 8 of 8)
• Section III ALINEMENT AND ADJUSTMENT PROCEDURES
• CRYSTAL REFERENCE SYSTEM (CRS) TEST.
• CONTROL AND SWITCH SETTINGS
• TEST PROCEDURE-continued
• LOCAL OSCILLATOR A1500 ALINEMENT.
• TEST SETUP
• ALINEMENT PROCEDURE
• LOCAL OSCILLATOR A1500 ALTERNATE ALINEMENT PROCEDURE.
• ALINEMENT PROCEDURE
• TUNER A1000 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• 30-M Hz Test
• IF DISCRIMINATOR A4200 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION IF DISCRIMINATOR A4200A ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• AUDIO AND SQUELCH PREAMPLIFIER A4300 ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• SILICON VERSION AUDIO AND SQUELCH PREAMPLIFIER A4300A ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• A5300 SQUELCH FILTER ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• ALINEMENT PROCEDURE-continued
• A5200 SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.
• ALINEMENT PROCEDURE
• SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.
• CONTROL AND SWITCH SETTINGS
• A5200 SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
• TEST SETUP
• CONTROL AND SWITCH SETTINGS
• ALINEMENT PROCEDURE
• SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
• TEST SETUP
• CONTROL AND SWITCH SETTINGS-continued
• ALINEMENT PROCEDURE
• CHAPTER 6. GENERAL SUPPORT MAINTENANCE
• Section II GENERAL SUPPORT MAINTENANCE PROCEDURES
• FRONT PANEL GEAR TRAIN ASSEMBLY MP101 REPLACEMENT-continued
• INSTALLATION
• FOLLOW-ON MAINTENANCE
• DIAL GLASS AND GASKET REPLACEMENT.
• A1000 ASSEMBLY MAIN CIRCUIT BOARD VR1001 REPLACEMENT.
• REMOVAL-continued
• REMOVAL-continued
• REMOVAL-continued
• INSTALLATION
• INSTALLATION-continued
• INSTALLATION-continued
• INSTALLATION-continued
• A2000 ASSEMBLY CIRCUIT BOARD Y2200 AND Y2100 REPLACEMENT.
• REMOVAL-continued
• REMOVAL-continued
• INSTALLATION
• INSTALLATION-continued
• FOLLOW-ON MAINTENANCE
• A2000 CRS ASSEMBLY MECHANICAL ADJUSTMENT.
• ADJUSTMENT-continued
• ASSEMBLY
• APPENDIX A. REFERENCES
• TECHNICAL MANUALS-continued
• TECHNICAL MANUALS-continued
• APPENDIX B. EXPENDABLE SUPPLIES AND MATERIALS LIST
• EXPENDABLE SUPPLIES AND MATERIALS LIST
• APPENDIX C. MANUFACTURED/FABRICATED ITEMS
• APPENDIX D. MAINTENANCE INFORMATION INDEX
• MAINTENANCE INFORMATION INDEX-continued
• GLOSSARY
• INDEX
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• THE METRIC SYSTEM AND EQUIVALENTS
• FO-1. Resistor, capacitor, and inductor color codes.
• FO-2. R-442(*)/VRC front panel assembly A100 wiring diagram.
• FO-3. R44-2(*)/VRC front panel and case assemblies, schematic diagram
• FO-4. VHF tuner assembly A1000, schematic diagram.
• FO-5. Crystal reference system A3000, schematic diagram.
• FO-6. IF amplifier assembly A4000, schematic diagram.
• FO-7. IF amplifier assembly A4000A, silicon version, schematic diagram.
• FO-8. Audio assembly A5000 and voltage regulator assembly A2100, silicon version, schematic diagram.
• FO-9. Audio assembly A5000A, silicon version, and voltage regulator assembly A21OOA, silicon version, schematic diagram.
• FO-10. Received signal path, simplified.
• FO-11. Crystal reference system, simplified.
• FO-12. A5000 audio and squelch assembly, simplified.
• FO-13. Degree wheel for crystal reference system (CRS) adjustment.
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