Service manual

6
Post Repair Calibration....................................................................................................................................................... 59
EEPROM Initialization................................................................................................................................................... 59
Principles Of Operation....................................................................................................................................................... 61
Introduction ........................................................................................................................................................................ 61
Bias Supplies ...................................................................................................................................................................... 61
GPIB Board Circuits........................................................................................................................................................... 61
Control Board Circuits........................................................................................................................................................ 62
Power Board Circuits.......................................................................................................................................................... 66
Module/Mainframe Communication................................................................................................................................... 66
Replaceable Parts ................................................................................................................................................................. 69
Introduction ........................................................................................................................................................................ 69
How To Order Parts............................................................................................................................................................ 69
Diagrams ............................................................................................................................................................................... 80
Introduction ........................................................................................................................................................................ 80
Test Point and Component Locations................................................................................................................................. 80
Schematic Diagram............................................................................................................................................................. 80
Signal Descriptions......................................................................................................................................................... 80
Manual Backdating .............................................................................................................................................................. 85
"A" Load Modules Troubleshooting .................................................................................................................................. 93
Earlier "A" Load Modules.................................................................................................................................................. 93
Later "A" Modules.............................................................................................................................................................. 93
DAC Circuits Troubleshooting (Figure 3-3)..................................................................................................................... 100
Slew Circuit Troubleshooting (Figure 3-4)....................................................................................................................... 101
CC/CV Control Circuit Troubleshooting (Figure 3-5)...................................................................................................... 102
Input Power Stages Troubleshooting (Figure 3-6)........................................................................................................... 105
Transient Generator Troubleshooting (Figure 3-7)........................................................................................................... 106
Overcurrent Circuit Troubleshooting (Figure 3-9) ........................................................................................................... 108
Overpower Circuit Troubleshooting (Figure 3-10)........................................................................................................... 109
Index.................................................................................................................................................................................... 111