2-1
Chapter 2
Theory of Operation
Title
Page
2-1.
Introduction............................................................................................. 2-3
2-2.
Start-Up Sequence .............................................................................. 2-3
2-3.
Function Selection .............................................................................. 2-3
2-4.
Power Supply .......................................................................................... 2-4
2-5.
Power Supply Input Voltages ............................................................. 2-4
2-6.
Power Supply Output Voltages and Currents..................................... 2-6
2-7.
Power Supply Signals ......................................................................... 2-7
2-8.
Power ON/OFF Requirements............................................................ 2-8
2-9.
NiCd Charging Requirements............................................................. 2-8
2-10.
Battery and Line Level Detection....................................................... 2-8
2-11.
Power Supply Functional Blocks............................................................ 2-9
2-12.
Input Power Selector (A) .................................................................... 2-9
2-13.
Boost Preregulator (B)........................................................................ 2-10
2-14.
Battery Charger (C) ............................................................................ 2-10
2-15.
DC-DC Converter (D) ........................................................................ 2-12
2-16.
Backlight Current Sink (E) ................................................................. 2-12
2-17.
Power Switch Circuitry (F)................................................................. 2-12
2-18.
LCD Contrast Control (G).................................................................. 2-12
2-19.
Power-On Reset Circuit (H) ............................................................... 2-12
2-20.
Linear Post Regulators (I)................................................................... 2-13
2-21.
Input Overload Protection....................................................................... 2-13
2-22.
Volt/Ohms Input Protection................................................................ 2-13
2-23.
External Trigger and Logic Activity Input Protection........................ 2-14
2-24.
Amps / mA /
µ
A Input Protection....................................................... 2-14
2-25.
Input Signal Conditioning....................................................................... 2-14
2-26.
AC Volts ............................................................................................. 2-14
2-27.
DC Volts ............................................................................................. 2-16
2-28.
mV DC................................................................................................ 2-16
2-29.
Ohms................................................................................................... 2-17
2-30.
Diode Test........................................................................................... 2-17
2-31.
Capacitance......................................................................................... 2-17
2-32.
mA/
µ
A ................................................................................................ 2-18
2-33.
Amps................................................................................................... 2-18
2-34.
Waveform Processing ............................................................................. 2-19
2-35.
Overview............................................................................................. 2-19
2-36.
Detailed Description........................................................................... 2-19
Summary of Contents for 863
Page 49: ...Maintenance Disassembly 3 3 5 OFF 1 6 Places 4 5 5 3 3 2 os5f eps Figure 3 1 Disassembly ...
Page 50: ...867B 863 Service Manual 3 6 os6f eps Figure 3 1 Disassembly cont ...
Page 52: ...867B 863 Service Manual 3 8 5 1 6 2 3 4 os30f eps Figure 3 2 Reassembly ...
Page 96: ...6 1 Chapter 6 Schematic Diagrams Title Page 6 1 A1 Main PCA Assembly 6 3 ...
Page 98: ...867B 863 Service Manual 6 4 FLUKE 867 1001 Sheet 2 of 5 Figure 6 1 A1 Main PCA cont ...
Page 99: ...Schematic Diagrams 6 6 5 FLUKE 867 1001 Sheet 3 of 5 Figure 6 1 A1 Main PCA cont ...
Page 100: ...867B 863 Service Manual 6 6 FLUKE 867 1001 Sheet 4 of 5 Figure 6 1 A1 Main PCA cont ...
Page 101: ...Schematic Diagrams 6 6 7 FLUKE 867 1001 Sheet 5 of 5 Figure 6 1 A1 Main PCA cont ...