TM 11-6625-2735-14-1
Section 4—475 Service
MAINTENANCE
This section of the manual contains directions for
Cabinet removal, preventive maintenance,
troubleshooting and corrective maintenance of the 475.
MAINTENANCE SECTION OUTLINE
Cabinet and Rock Adaptor Removal
Standard Cabinet Removal
Standard Cabinet Installation
Rack Adapter Removal
Rack Adapter Installation
Preventlve Maintenance
Introduction
Cleaning
Switch Contacts
General Interior
Exterior
CRT Face, Filter and Shields
Air Filter
Visual Inspection
Lubrication
Semiconductor Checks
Recalibration
Troubleshooting
Introduction
Troubleshooting Aids
Diagrams
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Circuit Board Illustrations
Adjustment Locations Illustrations
Resistor Color-Code
Capacitor Color-Code
Diode Color-Code
Semiconductor Lead Configuration
Troubleshooting Equipment
1. Semiconductor Tester
2. Test Oscilloscope
3. Multimeter
4. Variable Autotransformer
Troubleshooting Techniques
1.
2.
3.
4.
5.
6.
7.
8.
9.
Check Control Settings
Check Associated Equipment
Check Instrument Calibration
Visual Check
Isolate Trouble to a Circuit
Circuit Troubleshooting Sequence
Check Circuit Board Interconnection
Check Voltages and Waveforms
Check Individual Components
10. Repair and Readjust the Circuit
Special Troubleshooting Information
General
Troubleshooting the L.V. Power Supplies
Troubleshooting the High-Voltage Circuit
Troubleshooting the Sweep Circuits
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