6
Installing the Power Board............................................................................................................................................. 58
Installing the Bias Board................................................................................................................................................ 58
Installing the Front Panel Board and Front Panel Assembly.......................................................................................... 59
Installing the Fan............................................................................................................................................................ 59
Installing the Cover.........................................................................................................................................................59
Theory of Operation............................................................................................................................................................. 61
AC Input and Bias Supplies................................................................................................................................................61
Microprocessor Circuits......................................................................................................................................................61
CV/CC DACs..................................................................................................................................................................... 61
CV Amplifier...................................................................................................................................................................... 63
CC Amplifier...................................................................................................................................................................... 63
OR Gates ............................................................................................................................................................................ 63
Pulse-Width Modulator, FETS, and Isolation Transformer................................................................................................64
Downprogrammer Circuit...................................................................................................................................................64
Readback Multiplexer.........................................................................................................................................................64
OV Circuit.......................................................................................................................................................................... 65
Replacement Parts................................................................................................................................................................ 67
Diagrams ............................................................................................................................................................................... 83
Schematic Sheets................................................................................................................................................................ 83
Component Location Diagrams.......................................................................................................................................... 83
Schematic Notes................................................................................................................................................................. 84
Manual Backdating............................................................................................................................................................ 97
Index.................................................................................................................................................................................... 99