SECTION E: THEORY OF OPERATION
E-1 General
E-2 Troubleshooting
E-2-1 Localizing the problem
E-2-2 Component Replacement
E-3 Circuit Description
E-4 Analog-to-Digital Converter
E-4-1 Reference Voltage
E-4-2 LED Display
E-5 Ohms-to-DC Converter
E-5-1 Constant Current Source
E-5-2 Constant Current Circuit Operation
E-6 Failsafe Design
E-7 Ultra-Safe Power Supply Scheme
SECTION F: ROUTINE MAINTENANCE
F-1 General
F-2 Required Test Equipment
F-3 Calibration Procedure
F-4 Battery Replacement Instructions
E-8 Relay Board General Operation
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