HP 4145A - Page 8

List of Illustrations
Model 4145A
LIST OF ILLUSTRATIONS
Number
8-36.
8-37.
8-38.
8-39.
8-40.
8-41.
8-42.
8-43.
8-44.
8-45.
8-46.
8-47.
8-48.
8-49.
8-50.
8-51.
8-52.
8-53.
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8-54.
8-55.
8-56.
8-57.
8-58.
8-59.
8-60.
8-61.
8-62.
8-63.
8-64.
8-65.
8-66.
8-67.
8-68.
Title
Page
Self-Test Waveform . . . . . . . . . . . . . 8-97
SMU Board Block Diagram . . . . . . . . 8-98
SMU V Mode Operation . . . . . . . . . . . 8-99
SMU I Mode Operation . . . . . . . . . . . 8-99
Current Compliance in V Mode . . 8-100
V Error Amplifier . . . . . . . . . . . . . 8-100
Three Control Modes . . . . . . . . . . . 8-101
Example of Diode Feedback . . . . . 8-102
Power Amplifier Output Stage . . 8-102
Range Resistors . . . . . . . . . . . . . . . 8-103
Range Resistor Circuit . . . . . . . . 8-104
A5 SMU Board Assembly
Component Locations . . . . . . . . 8-106
A5 SMU Board Assembly
Schematic Diagram . . . . . . . . . . 8-107
A9 HP-IB and MSU Control Board
Assembly Component Locations 8-112
A9 HP-IB and MSU Control Board
Assembly Schematic Diagram . 8-113
Block Diagram of Key Control . . 8-115
A10 Keyboard and Display Board
Assembly Component Locations 8-116
A10 Keyboard and Display Board
Assembly Component Locations 8-117
All Board Troubleshooting
Flow Diagram ..T............ 8-118
Rectifier Circuit . . . . . . . . . . . . . 8-120
Switching Circuit . . . . . . . . . . . . . 8-120
Power Loss Detection Circuit . . 8-121
All Switching Power Supply
Board Assembly
Component Locations
" . . . . . . . 8-122
All Switching Power Supply
Board Assembly
Schematic Diagram . . . . . . . . . . 8-123
Al2 Board Troubleshooting
Flow Diagram . . . . . . . . . . . . . . . 8-124
Al2 DC Power Supply Board
Assembly Component Locations 8-126
Al2 DC Power Supply Board
Assembly Schematic Diagram . 8-127
Al3 Board Troubleshooting
Folw Diagram . . . . . . . . . . . . . . . 8-128
Voltage Change Sequence . . . . . ...8-129
Al3 SMU Power Source'Board
Assembly Component Locations.8-130
Al3 SMU Power Source Board
Assembly Schematic Diagram . 8-131
Al5 Board Troubleshooting
Flow Diagram . . . . . . . . . . . . . . . 8-132
Al5 Floating Power Supply Board
Assembly Component Locations 8-68
Number
Title
Page
8-69. Al5 Floating Power Supply Board
Assembly Schematic Diagram . 8-69
8-70. Al6 Board Troubleshooting
Flow Diagram . . . . . . . . . . . . . . . 8-136
8-71. Vs Block Diagram . . . . . . . . . . . . . . 8-138
8-72. Vm Block Diagram . . . . . . . . . . . . . . 8-138
8-73. Al6 Vs/Vm Board Assembly
Component Locations . . . . . . . . 8-140
8-74.
Al6 Vs/Vm Board Assembly
Schematic Diagram . . . . . . . . . . 8-141
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