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7
Power-on Self-test Failures 37
CV/CC Status Annunciators Troubleshooting 38
Bias and Reference Supplies 38
J307 Voltage Measurements 39
Manual Fan Speed Control 40
Disabling Protection Features 40
Post-repair Calibration 41
Inhibit Calibration Switch 41
Calibration Password 41
Initialization 42
ROM Upgrade 42
Identifying the Firmware 42
Upgrade Procedure 42
Disassembly Procedures 43
List of Required Tools 43
Cover, Removal and Replacement 44
A2 Interface Board, Removal and Replacement 44
Front Panel Assembly, Removal and Replacement 44
A3 Front Panel Board, Removal and Replacement 45
A1 Main Control Board 45
T1 Power Transformer, Removal and Replacement 45
Line Voltage Wiring 46
PRINCIPLES OF OPERATION 47
Introduction 47
I/O Interface Signals 47
A3 Front Panel Circuits 48
A2 Interface Circuits 48
Primary Interface 48
Secondary Interface 48
A1 Main Board Circuits 50
Power Circuits 50
Control Circuits 52
REPLACEABLE PARTS LIST 55
Introduction 55
DIAGRAMS 71
Introduction 71
General Schematic Notes 71
Backdating 71
INDEX 81