FIELD (FOURTH ECHELON) AND DEPOT MAINTENANCE MANUAL
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450004
Figure 9. Tests in selector switch positions A. 2..3, and 7. simplified schematic diagram.
Figure 10.1. Test in selector switch position 19. simplified schematic diagram.
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450007
Figure 11.2. Selector switch S7901, wiring diagram
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450009
Figure 15. Test Set, Radio TS-1777/VRM-1 and TS-1777A/VRM-1 front panel chassis, top view.
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450011
General Support and Depot Maintenance Manual Including Repair Parts and Special Tool List
Appendix II. GENERAL SUPPORT AND DEPOT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST
Special Information - TM-11-6625-496-450018
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450019
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450020
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450021
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450022
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450023
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450024
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450025
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450026
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450027
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450028
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450029
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450030
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450031
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450032
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450033
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450034
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450035
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450036
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450037
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450038
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450039
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450040
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450041
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450042
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450043
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450044
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450045
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450046
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450047
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450048
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450049
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450050
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450051
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450052
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450053
Figure 40. Test Set, Radio AN/VRM-1, components and running spares.
Figure 41. Branched power cable, partially disassembled.
Figure 42. Test set, case removed, three-quarter view from bottom
Figure 43. Audiofrequency amplifier printed circuit card A7400.
Figure 44. Teat set, case removed, adjustable components, rear view.
Figure 45 11.5-MHz amplifier printed circuit card A7600.
Figure 46. Case, test set removed, gaaket and bumpers (AN/VRM-1).
Figure 47. Test Set, Radio AN/VRM-1A, case cover and instruction plates.
Figure 49. Test Set, Radio AN/VRM-1, cover components.
Figure 51. Ted set, case removed, three-quarter view from top.
Figure 52. Band pass filter printed circuit card A7500.
Figure 53. Test probe assembly.
Figure 54.n Test set, front panel and chassis, chassis bottom plate removed, rear view.
Figure 55. Test set, front panel and chassis, bottom view.
Figure 56. Test set, front panel and chassis, left view.
Figure 57. Test probe, radiofrequency preamplifier.]
Figure 58. Teat set, front panel and chassis, top view.
Figure 59. Lamp driving gates printed circuit card 7800.
Figure 60. Radiofrequency amplifier printed circuit card A 7700.
GS and Depot Maintenance Manual Including Repair Parts and Special Took Lists
Figure 10.1. Test in selector switch position 19, simplified schematic diagram
Figure 11. Selector Switch S7902, wiring diagram - TM-11-6625-496-450077
Figure 11.1. Test Set, Radio TS-1777A/VRM-1
Selector Switch Position 1.
Figure 23.1. TS-1777A/VRM-1 (and later production units of TS-1777/VRM-1), bottom view and location of adjustable controls.
Selector Switch Position 1 - continued - TM-11-6625-496-450081
Selector Switch Position 1 - continued - TM-11-6625-496-450082
Figure30-1. Assembly A7500 in TS-1777A/VRM-1 in later production waits of T S - 1 7 7 7 / V R M - 1 , parts location
Selector Switch Position 1 - continued - TM-11-6625-496-450084
Order of the Secretary of the Army - TM-11-6625-496-450085
Field (Fourth Echoion) and Depot Maintenance Manual
Section II. DEPOT INSPECTION STANDARDS
Test Facilities Required
Figure 34.1. (Added) Special junction box.
Figure 34.2. (Added) Special test cable.
Audio Voltage Test
Figure 34.5. (Added) Audio voltage test setup, block diagram
Amplifier, 11.5-Mc, Tests
Figure 34.6. (Added) RF voltage leads setup, block diagram
Amplifier, 47. 0-MC, Test
Figure 39.1. TS-1777A/VRM-1 and later production units of TS-1777/VRM-1 , schematic diagram
Figure 38.2. TS-1777A/VRM-1 and later production units of TS-1777A/VRM-1, Power distribution diagram
Figure 39.2. TS-1777A/VRM-1 schematic diagram
Figure 38.1. TS-1777A/VRM-1and later production units of TS-1777/VRM-1, power distribution diagram
TEST SET, RADIO AN/VRM-1
Chapter 1. THEORY
Audio Amplifier
Figure 1. Audio amplifier, schematic diagram.
Figure 2. Amplifier, 11.6-mc, schematic diagram.
Figure 3. Amplifier, 5.65-mc, schematic diagram.
Test Probe Rf Preamplifier
Voltage Supply Limits Sensing Circuit
Schmitt Trigger Circuit
Figure 7. Schmitt trigger circuit, schematic diagram.
Figure 8. Line voltage sensing circuit, schematic diagram.
Selector Switch Position 2
Figure 9 . Testing selector switch positions A, 2, 3, and 7, simplified schematic diagram .
Selector Switch Position 8
Figure 10. Tests in selector switch positions 8, 12, 13, 16, and 18 simplified schematic diagram.
Selector Switch Positions 16 and 17
Chapter 2. FOURTH ECHELON MAINTENANCE
Section Il. TROUBLESHOOTING
Troubleshooting Chart. - TM-11-6625-496-450121
Troubleshooting Chart. - continued - TM-11-6625-496-450122
Troubleshooting Chart. - continued - TM-11-6625-496-450123
Isolating Troubles in Switch S7902
Figure 11. Selector switch S7902, wiring diagram - TM-11-6625-496-450125
Figue 12. Test Set, Radio TS-177/VRM-1, upper left oblique view.
Figure 13. Test Set, Radio TS-1777/VRM-1, lower left oblique view.
Replacement of Chassis Bottom Plate
Replacement of Diode CR7902
Replacement of Switch S7902.
Figure 15. Test Set, Radio TS-1777/VRM-1 front panel chassis, top v i e w .
Figure 17. Test Set, Radio TS-1777/VRM-1 f r o n t panel and chassis, bottom view.
Figure 18. Test Set, Radio TS-1777/VRM-1 case with f r o n t panel and chassis removed.
Figure 19. Test probe cable, disassembled.
Section IV. FINAL ADJUSTMENTS
Figure 21. Fabrication of special test cables.
Audio Circuits
Circuits 11.5-mc
Section V. FOURTH ECHELON TESTING PROCEDURES
Test Equipment.
Physical Test and Inspection
Figure 24. Power Tests
Power Test
Figre 25. audio amplifier test
audio amplifier test
Figure 26. 26. 5.65-mc amplifier tests
5.65-mc amplifier tests
Figure 27. 11.5-mc amplifiers tests
11.5-mc amplifiers tests
Figure 28. 47.0-mc amplifier tests
47.0-mc amplifier tests
Summary of Test Data - TM-11-6625-496-450154
Chapter 3. FIFTH ECHELON MAINTENANCE
Isolation.
Isolating Troubles in Assembly A7500
Isolating Troubles in Assembly A7600
Figure 30. Assembly A 7600, parts location
Isolating Troubles in Assembly A7700
Gain Test for 47-Mc Amplifier.
Isolating Trouble in Assembly A7800
Voltage Supply Limits Sensing Circuit Tests
Figure 32.. Assembly A 7700, parts location.
Section II. FIFTH ECHELON TESTING PROCEDURES
Power Tests
Amplifier Tests, 5.65-Mc
Amplifier Test, 47.0-Mc
Appendix. REFERENCES - TM-11-6625-496-450169
Figure 35. Color code markings for MIL-STD resistors
Figure 36. Color Code Markings for MIL-STD Capcitors
Figure 37. Test Set, Radio AN/VRM-1, block diagram
Figure 38. Test Set, Radio AN/VRM-1, power distribution diagram
Figure 39. Test Set Radio TS-1777/VRM-1, schematic diagram
INDEX - TM-11-6625-496-450175
INDEX - continued - TM-11-6625-496-450176
TM-11-6625-496-45 - index
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450004
Figure 9. Tests in selector switch positions A. 2..3, and 7. simplified schematic diagram.
Figure 10.1. Test in selector switch position 19. simplified schematic diagram.
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450007
Figure 11.2. Selector switch S7901, wiring diagram
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450009
Figure 15. Test Set, Radio TS-1777/VRM-1 and TS-1777A/VRM-1 front panel chassis, top view.
General Support and Depot Maintenance Manual Including Repair Parts and Special Tools Lists - continued - TM-11-6625-496-450011
General Support and Depot Maintenance Manual Including Repair Parts and Special Tool List
Appendix II. GENERAL SUPPORT AND DEPOT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST
Special Information - TM-11-6625-496-450018
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450019
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450020
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450021
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450022
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450023
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450024
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450025
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450026
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450027
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450028
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450029
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450030
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450031
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450032
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450033
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450034
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450035
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450036
SECTION II REPAIR PARTS FOR DIRECT SUPPORT, GENERAL SUPPORT. AND DEPOT MAINTENANCE - TM-11-6625-496-450037
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450038
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450039
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450040
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450041
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450042
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450043
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450044
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450045
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450046
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450047
SECTION III INDEX-FEDERAL STOCK NUMBER AND REFERENCE NUMBER CROSS REFERENCE TO FIGURE AND ITEM NUMBER OR REFERENCE DESIGNATION - TM-11-6625-496-450048
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450049
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450050
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450051
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450052
Section IV. Index-Reference Designation Cross Reference to Page Number - TM-11-6625-496-450053
Figure 40. Test Set, Radio AN/VRM-1, components and running spares.
Figure 41. Branched power cable, partially disassembled.
Figure 42. Test set, case removed, three-quarter view from bottom
Figure 43. Audiofrequency amplifier printed circuit card A7400.
Figure 44. Teat set, case removed, adjustable components, rear view.
Figure 45 11.5-MHz amplifier printed circuit card A7600.
Figure 46. Case, test set removed, gaaket and bumpers (AN/VRM-1).
Figure 47. Test Set, Radio AN/VRM-1A, case cover and instruction plates.
Figure 49. Test Set, Radio AN/VRM-1, cover components.
Figure 51. Ted set, case removed, three-quarter view from top.
Figure 52. Band pass filter printed circuit card A7500.
Figure 53. Test probe assembly.
Figure 54.n Test set, front panel and chassis, chassis bottom plate removed, rear view.
Figure 55. Test set, front panel and chassis, bottom view.
Figure 56. Test set, front panel and chassis, left view.
Figure 57. Test probe, radiofrequency preamplifier.]
Figure 58. Teat set, front panel and chassis, top view.
Figure 59. Lamp driving gates printed circuit card 7800.
Figure 60. Radiofrequency amplifier printed circuit card A 7700.
GS and Depot Maintenance Manual Including Repair Parts and Special Took Lists
Figure 10.1. Test in selector switch position 19, simplified schematic diagram
Figure 11. Selector Switch S7902, wiring diagram - TM-11-6625-496-450077
Figure 11.1. Test Set, Radio TS-1777A/VRM-1
Selector Switch Position 1.
Figure 23.1. TS-1777A/VRM-1 (and later production units of TS-1777/VRM-1), bottom view and location of adjustable controls.
Selector Switch Position 1 - continued - TM-11-6625-496-450081
Selector Switch Position 1 - continued - TM-11-6625-496-450082
Figure30-1. Assembly A7500 in TS-1777A/VRM-1 in later production waits of T S - 1 7 7 7 / V R M - 1 , parts location
Selector Switch Position 1 - continued - TM-11-6625-496-450084
Order of the Secretary of the Army - TM-11-6625-496-450085
Field (Fourth Echoion) and Depot Maintenance Manual
Section II. DEPOT INSPECTION STANDARDS
Test Facilities Required
Figure 34.1. (Added) Special junction box.
Figure 34.2. (Added) Special test cable.
Audio Voltage Test
Figure 34.5. (Added) Audio voltage test setup, block diagram
Amplifier, 11.5-Mc, Tests
Figure 34.6. (Added) RF voltage leads setup, block diagram
Amplifier, 47. 0-MC, Test
Figure 39.1. TS-1777A/VRM-1 and later production units of TS-1777/VRM-1 , schematic diagram
Figure 38.2. TS-1777A/VRM-1 and later production units of TS-1777A/VRM-1, Power distribution diagram
Figure 39.2. TS-1777A/VRM-1 schematic diagram
Figure 38.1. TS-1777A/VRM-1and later production units of TS-1777/VRM-1, power distribution diagram
TEST SET, RADIO AN/VRM-1
Chapter 1. THEORY
Audio Amplifier
Figure 1. Audio amplifier, schematic diagram.
Figure 2. Amplifier, 11.6-mc, schematic diagram.
Figure 3. Amplifier, 5.65-mc, schematic diagram.
Test Probe Rf Preamplifier
Voltage Supply Limits Sensing Circuit
Schmitt Trigger Circuit
Figure 7. Schmitt trigger circuit, schematic diagram.
Figure 8. Line voltage sensing circuit, schematic diagram.
Selector Switch Position 2
Figure 9 . Testing selector switch positions A, 2, 3, and 7, simplified schematic diagram .
Selector Switch Position 8
Figure 10. Tests in selector switch positions 8, 12, 13, 16, and 18 simplified schematic diagram.
Selector Switch Positions 16 and 17
Chapter 2. FOURTH ECHELON MAINTENANCE
Section Il. TROUBLESHOOTING
Troubleshooting Chart. - TM-11-6625-496-450121
Troubleshooting Chart. - continued - TM-11-6625-496-450122
Troubleshooting Chart. - continued - TM-11-6625-496-450123
Isolating Troubles in Switch S7902
Figure 11. Selector switch S7902, wiring diagram - TM-11-6625-496-450125
Figue 12. Test Set, Radio TS-177/VRM-1, upper left oblique view.
Figure 13. Test Set, Radio TS-1777/VRM-1, lower left oblique view.
Replacement of Chassis Bottom Plate
Replacement of Diode CR7902
Replacement of Switch S7902.
Figure 15. Test Set, Radio TS-1777/VRM-1 front panel chassis, top v i e w .
Figure 17. Test Set, Radio TS-1777/VRM-1 f r o n t panel and chassis, bottom view.
Figure 18. Test Set, Radio TS-1777/VRM-1 case with f r o n t panel and chassis removed.
Figure 19. Test probe cable, disassembled.
Section IV. FINAL ADJUSTMENTS
Figure 21. Fabrication of special test cables.
Audio Circuits
Circuits 11.5-mc
Section V. FOURTH ECHELON TESTING PROCEDURES
Test Equipment.
Physical Test and Inspection
Figure 24. Power Tests
Power Test
Figre 25. audio amplifier test
audio amplifier test
Figure 26. 26. 5.65-mc amplifier tests
5.65-mc amplifier tests
Figure 27. 11.5-mc amplifiers tests
11.5-mc amplifiers tests
Figure 28. 47.0-mc amplifier tests
47.0-mc amplifier tests
Summary of Test Data - TM-11-6625-496-450154
Chapter 3. FIFTH ECHELON MAINTENANCE
Isolation.
Isolating Troubles in Assembly A7500
Isolating Troubles in Assembly A7600
Figure 30. Assembly A 7600, parts location
Isolating Troubles in Assembly A7700
Gain Test for 47-Mc Amplifier.
Isolating Trouble in Assembly A7800
Voltage Supply Limits Sensing Circuit Tests
Figure 32.. Assembly A 7700, parts location.
Section II. FIFTH ECHELON TESTING PROCEDURES
Power Tests
Amplifier Tests, 5.65-Mc
Amplifier Test, 47.0-Mc
Appendix. REFERENCES - TM-11-6625-496-450169
Figure 35. Color code markings for MIL-STD resistors
Figure 36. Color Code Markings for MIL-STD Capcitors
Figure 37. Test Set, Radio AN/VRM-1, block diagram
Figure 38. Test Set, Radio AN/VRM-1, power distribution diagram
Figure 39. Test Set Radio TS-1777/VRM-1, schematic diagram
INDEX - TM-11-6625-496-450175
INDEX - continued - TM-11-6625-496-450176
TM-11-6625-496-45 - index
