Fluke 123B/S Service Manual - Page 9

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List of Figures Figure Title Page 2-2.Max. Input Voltage v.s. Frequency for VP40 10:1 Voltage Probe 2-13 3-1.Fluke 123 Block Diagram 3-2 3-2.Fluke 123 Start-up Sequence, Operating Modes 3-8 3-3.Power Supply Block Diagram 3-9 3-4.CHAGATE Control Voltage 3-12 3-5.Fly-Back Converter Current and Control Voltage 3-12 3-6.Fly-Back Converter Block Diagram 3-13 3-7.Back Light Converter Voltages 3-15 3-8.C-ASIC Block Diagram 3-15 3-9.Capacitance Measurement 3-19 3-10.T-ASIC Trigger Section Block Diagram 3-21 3-11.Random Repetitive Sampling Mode 3-22 3-12.Reference Voltage Section 3-24 3-13.LCD Control ...3-27 4-1.Display Pixel Test Pattern 4-5 4-2.Menu item selection 4-6 4-3.Test Tool Input A to 5500A Scope Output 50 4-8 4-4.Test Tool Input B to 5500A Scope Output 50 4-10 4-5.Test Tool Input A-B to 5500A Normal Output 4-12 4-6.Test Tool Input A-B to 5500A Normal Output for >300V 4-20 4-7.Test Tool Input A to 5500A Normal Output 4-Wire 4-21 4-8.Test Tool Input A to TV Signal Generator 4-24 4-9.Test Tool Screen for PAL/SECAM line 622 4-25 4-10.Test Tool Screen for NTSC line 525 4-25 4-11.Test Tool Screen for PAL/SECAM line 310 4-26 4-12.Test Tool Screen for NTSC line 262 4-26 4-13.Test Tool Input A to TV Signal Generator Inverted 4-26 4-14.Test Tool Screen for PAL/SECAM line 310 Negative Video 4-27 4-15.Test Tool Screen for NTSC line 262 Negative Video 4-27 5-1.Version & Calibration Screen 5-3 5-2.Display Test Pattern 5-6 5-3.HF Gain Calibration Input Connections 5-7 5-4.5500A Scope Output to Input A 5-9 5-5.5500A Scope Output to Input B 5-10

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List of Figures
Figure
Title
Page
2-2.Max. Input Voltage v.s. Frequency for VP40 10:1 Voltage Probe
..........................
2-13
3-1.Fluke 123 Block Diagram
........................................................................................
3-2
3-2.Fluke 123 Start-up Sequence, Operating Modes
.....................................................
3-8
3-3.Power Supply Block Diagram
..................................................................................
3-9
3-4.CHAGATE Control Voltage
...................................................................................
3-12
3-5.Fly-Back Converter Current and Control Voltage
...................................................
3-12
3-6.Fly-Back Converter Block Diagram
........................................................................
3-13
3-7.Back Light Converter Voltages
...............................................................................
3-15
3-8.C-ASIC Block Diagram
...........................................................................................
3-15
3-9.Capacitance Measurement
.......................................................................................
3-19
3-10.T-ASIC Trigger Section Block Diagram
...............................................................
3-21
3-11.Random Repetitive Sampling Mode
......................................................................
3-22
3-12.Reference Voltage Section
....................................................................................
3-24
3-13.LCD Control
..........................................................................................................
3-27
4-1.Display Pixel Test Pattern
.......................................................................................
4-5
4-2.Menu item selection
.................................................................................................
4-6
4-3.Test Tool Input A to 5500A Scope Output 50
Ω
......................................................
4-8
4-4.Test Tool Input B to 5500A Scope Output 50
Ω
......................................................
4-10
4-5.Test Tool Input A-B to 5500A Normal Output
.......................................................
4-12
4-6.Test Tool Input A-B to 5500A Normal Output for >300V
......................................
4-20
4-7.Test Tool Input A to 5500A Normal Output 4-Wire
...............................................
4-21
4-8.Test Tool Input A to TV Signal Generator
..............................................................
4-24
4-9.Test Tool Screen for PAL/SECAM line 622
...........................................................
4-25
4-10.Test Tool Screen for NTSC line 525
.....................................................................
4-25
4-11.Test Tool Screen for PAL/SECAM line 310
.........................................................
4-26
4-12.Test Tool Screen for NTSC line 262
.....................................................................
4-26
4-13.Test Tool Input A to TV Signal Generator Inverted
..............................................
4-26
4-14.Test Tool Screen for PAL/SECAM line 310 Negative Video
...............................
4-27
4-15.Test Tool Screen for NTSC line 262 Negative Video
...........................................
4-27
5-1.Version & Calibration Screen
..................................................................................
5-3
5-2.Display Test Pattern
.................................................................................................
5-6
5-3.HF Gain Calibration Input Connections
..................................................................
5-7
5-4.5500A Scope Output to Input A
..............................................................................
5-9
5-5.5500A Scope Output to Input B
...............................................................................
5-10