Fluke 123 Область метр
Производитель:
Модель:
123
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Описание:
Industrial ScopeMeter

Информация

Dual input oscilloscope Vertical Frequency response DC coupled: Excluding probes and test leads: DC to 20 MHz (-3 dB) With STL120 1:1 shielded test leads: DC to 12.5 MHz (-3 dB) DC to 20 MHz (-6 dB) With PM 8918 10:1 Probe (optional accessory): DC to 20 MHz (-3 dB) AC coupled (LF roll off) Excluding probes and test leads: <10 Hz (-3 dB) With STL120: <10 Hz (-3 dB) With PM 8918: <1 Hz (-3 dB) Rise time Excluding probes and test leads: <17.5 ns Input impedance Excluding probes and test leads: 1 MW//12 pF With BB120: 1 MW//20 pF With STL120: 1 MW//225 pF With PM 8918: 10 MW//15 pF Sensitivity: 5 mV to 500V/div Display modes: A, -A, B, -B Max input voltage A, B: 600V rms up to 200 kHz, derating to 6V rms @ 20 MHz Max floating voltage From any terminal to ground: 600V rms up to 400 Hz Resolution: 8 bit Vertical accuracy: ±(1% of reading + 0.05 range/div) Max vertical move: ±4 divisions Horizontal Acquisition modes Normal: Equivalent sampling: 20 ns to 500 ns/div; real time sampling: 1 ms to 5s/div Single (real time): 1 ms to 5s/div Roll (real time): 1s to 60s/div Sampling rate (for both channels simultaneously): For repetitive signals (equivalent sampling) up to 1.25 GS/s; real time (normal and single): 1 ms to 5 ms/div, 25 MS/s; 10 ms to 5s/div, 5 MS/s Time base accuracy Equivalent sampling: ±(0.4% of reading +0.04 time/div) Real time sampling: ±(0.1% of reading +0.04 time/div) Glitch detection: ³40 ns @ 20 ns to 5 ms/div; ³200 ns @ 10 ms to 5s/div Glitch detection is always active Horizontal move, 10 divisions. Permits shifting of the display from 0 to 10 division of pre-trigger. Trigger point will always be visible.

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Declaration of Conformity ... 1 Unpacking the Test Tool Kit ... 2 Safely Using the Test Tool ... 4 1 Using The Test Tool ... 7 Goal of this Chapter ... 7 Powering the Test Tool ... 7 Resetting the Test Tool ... 8 Changing Backlight ... 9 Reading the Screen ... 10 Making Selections in a Menu ... 11 Looking at the Measurement Connections ... 12 Displaying an Unknown Signal with Connect-and View™ ... 13 Making Measurements ... 14 Freezing the Screen ... 16 Holding a Stable Reading ... 16 Making Relative Measurements ... 17 Selecting Auto/Manual Ranges ... 18 Changing the Graphic Representation on the Screen ... 18 TrendPlotting a Waveform ... 22 Acquiring the Waveform ... 23 Triggering on a Waveform ... 27 Saving and Recalling a Setup and a Screen ... 32 Making Cursor Measurements ... 35 Using the 10:1 Probe for High Frequency Measurements ... 38 Using a Printer ... 39 Using FlukeView® Software ... 41 2 Maintaining the Test Tool ... 43 About this Chapter ... 43 Cleaning the Test Tool ... 43 Storing the Test Tool ... 43 Charging the Rechargeable Battery Pack ... 44 Keeping Batteries in Optimal Condition ... 45 Replacing and Disposing of the Rechargeable Battery Pack ... 46 Using and Adjusting 10:1 Scope Probes ... 47 Calibrating the Test Tool ... 49 Parts and Accessories ... 49 3 Tips and Troubleshooting ... 53 Goal of this Chapter ... 53 Using the Tilt Stand ... 53 Resetting the Test Tool ... 54 Changing the Information Language ... 54 Changing the Display ... 55 Changing Date and Time ... 56 Saving Battery Life ... 57 Changing the Auto Set Options ... 58 Using Proper Grounding ... 59 Solving Printing and Other Communication Errors ... 60 Battery Testing of Fluke Accessories ... 60 4 Specifications ... 61 Introduction ... 61 Dual Input Oscilloscope ... 62 Dual Input Meter ... 65 Cursor readout (Fluke 124) ... 68 Miscellaneous ... 69 Environmental ... 70 Safety ... 70

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Declaration of Conformity ... 1 Unpacking the Test Tool Kit ... 2 Safely Using the Test Tool ... 4 1 Using The Test Tool ... 7 Goal of this Chapter ... 7 Powering the Test Tool ... 7 Resetting the Test Tool ... 8 Changing Backlight ... 9 Reading the Screen ... 10 Making Selections in a Menu ... 11 Looking at the Measurement Connections ... 12 Input A ... 12 Input B ... 12 COM ... 12 Displaying an Unknown Signal with Connect-and-View™ ... 13 Making Measurements ... 14 Freezing the Screen ... 16 Holding a Stable Reading ... 16 Making Relative Measurements ... 17 Selecting Auto/Manual Ranges ... 18 Changing the Graphic Representation on the Screen ... 18 Changing the Amplitude ... 18 Changing the Time Base ... 18 Positioning the Waveform on the Screen ... 19 Smoothing the Waveform ... 20 Displaying the Envelope of a Waveform ... 21 TrendPlotting a Waveform ... 22 Starting a TrendPlot™ function ... 22 Changing the TrendPlot Reading ... 23 Turning Off the TrendPlot Display ... 23 Acquiring the Waveform ... 23 Making a Single Acquisition ... 23 Recording Slow Signals over a Long Period of Time ... 25 Selecting AC-Coupling ... 26 Reversing the Polarity of the Displayed Waveform ... 26 Triggering on a Waveform ... 27 Setting Trigger Level and Slope ... 27 Selecting the Trigger Parameters ... 28 Isolated Triggering ... 29 Triggering on Video Signals ... 29 Triggering on a Specific Video Line ... 31 Saving and Recalling a Setup or a Screen ... 32 Saving Screens ... 32 Recalling Screens ... 33 Deleting Screens ... 33 Using a Printer ... 34 Using FlukeView® Software ... 36 2 Maintaining the Test Tool ... 37 About this Chapter ... 37 Cleaning the Test Tool ... 37 Storing the Test Tool ... 37 Charging the Ni-Cd Battery Pack ... 38 Keeping Batteries in Optimal Condition ... 39 Replacing and Disposing of the Ni-Cd Battery Pack ... 40 Using and Adjusting 10:1 Scope Probes ... 41 Calibrating the Test Tool ... 43 Parts and Accessories ... 43 Service Manual ... 43 Standard Accessories ... 43 Optional Accessories ... 46 3 Tips and Troubleshooting ... 47 Goal of this Chapter ... 47 Using the Tilt Stand ... 47 Resetting the Test Tool ... 48 Changing the Information Language ... 48 Changing the Display ... 49 Adjusting the Screen Contrast ... 49 Setting the Grid Display ... 49 Changing Date and Time ... 50 Saving Battery Life ... 51 Setting the Power Down Timer ... 51 Changing the Auto Set Options ... 52 Using Proper Grounding ... 53 Solving Printing and Other Communication Errors ... 54 4 Specifications ... 55 Introduction ... 55 Dual Input Oscilloscope ... 56 Vertical ... 56 Horizontal ... 57 Trigger ... 57 Advanced Scope Functions ... 58 Dual Input Meter ... 59 Input A and Input B ... 59 Input A ... 60 Advanced Meter Functions ... 61 Miscellaneous ... 62 Environmental ... 63 Safety ... 64

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Safety Instructions ... 1-1 1.1 Introduction ... 1-3 1.2 Safety Precautions ... 1-3 1.3 Caution and Warning Statements ... 1-3 1.4 Symbols used in this Manual and on Instrument ... 1-3 1.5 Impaired Safety ... 1-4 1.6 General Safety Information ... 1-4 Characteristics ... 2-1 2.1 Introduction ... 2-3 2.2 Dual Input Oscilloscope ... 2-3 2.2.1 Vertical ... 2-3 2.2.2 Horizontal ... 2-4 2.2.3 Trigger ... 2-4 2.2.4 Advanced Scope Functions ... 2-5 2.3 Dual Input Meter ... 2-5 2.3.1 Input A and Input B ... 2-5 2.3.2 Input A ... 2-8 2.3.3 Advanced Meter Functions ... 2-9 2.4 Cursor Readout (Fluke 124) ... 2-9 2.5 Miscellaneous ... 2-9 2.6 Environmental ... 2-11 2.7 Service and Maintenance ... 2-12 2.8 Safety ... 2-12 2.9 EMC Immunity ... 2-14 Circuit Descriptions ... 3-1 3.1 Introduction ... 3-3 3.2 Block Diagram ... 3-3 3.2.1 Channel A, Channel B Measurement Circuits ... 3-4 3.2.2 Trigger Circuit ... 3-4 3.2.3 Digital Circuit ... 3-5 3.2.4 Power Circuit ... 3-6 3.2.5 Start-up Sequence, Operating Modes ... 3-7 3.3 Detailed Circuit Descriptions ... 3-9 3.3.1 Power Circuit ... 3-9 3.3.2 Channel A - Channel B Measurement Circuits ... 3-15 3.3.3 Trigger Circuit ... 3-20 3.3.4 Digital Circuit and ADC’s ... 3-25 Performance Verification ... 4-1 4.1 Introduction ... 4-3 4.2 Equipment Required For Verification ... 4-3 4.3 How To Verify ... 4-3 4.4 Display and Backlight Test ... 4-4 4.5 Input A and Input B Tests ... 4-5 4.5.1 Input A and B Base Line Jump Test ... 4-6 4.5.2 Input A Trigger Sensitivity Test ... 4-7 4.5.3 Input A Frequency Response Upper Transition Point Test ... 4-8 4.5.4 Input A Frequency Measurement Accuracy Test ... 4-9 4.5.5 Input B Frequency Measurement Accuracy Test ... 4-10 4.5.6 Input B Frequency Response Upper Transition Point Test ... 4-10 4.5.7 Input B Trigger Sensitivity Test ... 4-11 4.5.8 Input A and B Trigger Level and Trigger Slope Test ... 4-12 4.5.9 Input A and B DC Voltage Accuracy Test ... 4-14 4.5.10 Input A and B AC Voltage Accuracy Test ... 4-16 4.5.11 Input A and B AC Input Coupling Test ... 4-17 4.5.12 Input A and B Volts Peak Measurements Test ... 4-18 4.5.13 Input A and B Phase Measurements Test ... 4-19 4.5.14 Input A and B High Voltage AC/DC Accuracy Test ... 4-20 4.5.15 Resistance Measurements Test ... 4-21 4.5.16 Continuity Function Test ... 4-22 4.5.17 Diode Test Function Test ... 4-23 4.5.18 Capacitance Measurements Test ... 4-23 4.5.19 Video Trigger Test ... 4-24 Calibration Adjustment ... 5-1 5.1 General ... 5-3 5.1.1 Introduction ... 5-3 5.1.2 Calibration number and date ... 5-3 5.1.3 General Instructions ... 5-3 5.2 Equipment Required For Calibration ... 5-4 5.3 Starting Calibration Adjustment ... 5-4 5.4 Contrast Calibration Adjustment ... 5-6 5.5 Warming Up & Pre-Calibration ... 5-7 5.6 Final Calibration ... 5-7 5.6.1 HF Gain Input A&B ... 5-7 5.6.2 Delta T Gain, Trigger Delay Time & Pulse Adjust Input A ... 5-9 5.6.3 Pulse Adjust Input B ... 5-10 5.6.4 Gain DMM (Gain Volt) ... 5-10 5.6.5 Volt Zero ... 5-12 5.6.6 Zero Ohm ... 5-12 5.6.7 Gain Ohm ... 5-13 5.6.8 Capacitance Gain Low and High ... 5-14 5.6.9 Capacitance Clamp & Zero ... 5-14 5.6.10 Capacitance Gain ... 5-15 5.7 Save Calibration Data and Exit ... 5-15 Disassembling the Test Tool ... 6-1 6.1. Introduction ... 6-3 6.2. Disassembling Procedures ... 6-3 6.1.1 Required Tools ... 6-3 6.2.2 Removing the Battery Pack ... 6-3 6.2.3 Removing the Bail ... 6-3 6.2.4 Opening the Test Tool ... 6-3 6.2.5 Removing the Main PCA Unit ... 6-5 6.2.6 Removing the Display Assembly ... 6-6 6.2.7 Removing the Keypad and Keypad Foil ... 6-6 6.3 Disassembling the Main PCA Unit ... 6-6 6.4 Reassembling the Main PCA Unit ... 6-8 6.5 Reassembling the Test Tool ... 6-8 Corrective Maintenance ... 7-1 7.1 Introduction ... 7-3 7.2 Starting Fault Finding. ... 7-4 7.3 Charger Circuit ... 7-4 7.4 Starting with a Dead Test Tool ... 7-6 7.4.1 Test Tool Completely Dead ... 7-6 7.4.2 Test Tool Software Does not Run. ... 7-7 7.4.3 Software Runs, Test Tool not Operative ... 7-7 7.5 Miscellaneous Functions ... 7-8 7.5.1 Display and Back Light ... 7-8 7.5.2 Fly Back Converter ... 7-9 7.5.3 Slow ADC ... 7-10 7.5.4 Keyboard ... 7-11 7.5.5 Optical Port (Serial RS232 Interface) ... 7-11 7.5.6 Channel A, Channel B Voltage easurements ... 7-11 7.5.7 Channel A Ohms and Capacitance Measurements ... 7-13 7.5.8 Trigger Functions ... 7-14 7.5.9 Reference Voltages ... 7-15 7.5.10 Buzzer Circuit ... 7-15 7.5.11 Reset ROM Circuit ... 7-16 7.5.12 RAM Test ... 7-16 7.5.13 Power ON/OFF ... 7-17 7.5.14 PWM Circuit ... 7-17 7.5.15 Randomize Circuit ... 7-17 7.6 Loading Software ... 7-17 7.7 Configuration of CPLD-chip D470 ... 7-17 Circuit Diagrams ... 9-1 9.1 Introduction ... 9-1 9.2 Schematic Diagrams ... 9-2 Modifications ... 10-1 10.1 Software modifications ... 10-1 10.2 Hardware modifications ... 10-1

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Информация

Limited Warranty & Limitation of Liability ... ii Introduction and Safety Instructions ... 1-1 1.1 Introduction to Service Manual ... 1-3 1.2 Safety ... 1-3 1.2.1 Introduction ... 1-3 1.2.2 Safety Precautions ... 1-3 1.2.3 Caution and Warning Statements ... 1-3 1.2.4 Symbols used in this Manual and on Instrument ... 1-4 1.2.5 Impaired Safety ... 1-4 1.2.6 General Safety Information ... 1-4 Characteristics ... 2-1 2.1 Introduction ... 2-3 2.2 Dual Input Oscilloscope ... 2-3 2.2.1 Vertical ... 2-3 2.2.2 Horizontal ... 2-4 2.2.3 Trigger ... 2-4 2.2.4 Advanced Scope Functions ... 2-5 2.3 Dual Input Meter ... 2-5 2.3.1 Input A and Input B ... 2-5 2.3.2 Input A ... 2-8 2.3.3 Advanced Meter Functions ... 2-9 2.4 Cursor Readout (Fluke 124, 125) ... 2-10 2.5 Harmonics Measurements (Fluke 125) ... 2-10 2.6 Field Bus Measurements (Fluke 125) ... 2-11 2.7 Miscellaneous ... 2-11 2.8 Environmental ... 2-12 2.9 Service and Maintenance ... 2-13 2.10 Safety ... 2-13 2.11 EMC Immunity ... 2-15 Performance Verification ... 3-1 3.1 Introduction ... 3-3 3.2 Equipment Required For Verification ... 3-3 3.3 How To Verify ... 3-4 3.4 Display and Backlight Test ... 3-4 3.5 Input A and Input B Tests ... 3-5 3.5.1 Input A and B Base Line Jump Test ... 3-6 3.5.2 Input A Trigger Sensitivity Test ... 3-8 3.5.3 Input A Frequency Response Upper Transition Point Test ... 3-9 3.5.4 Input A Frequency Measurement Accuracy Test ... 3-9 3.5.5 Input B Frequency Measurement Accuracy Test ... 3-10 3.5.6 Input B Frequency Response Upper Transition Point Test ... 3-11 3.5.7 Input B Trigger Sensitivity Test ... 3-12 3.5.8 Input A and B Trigger Level and Trigger Slope Test ... 3-13 3.5.9 Input A and B DC Voltage Accuracy Test ... 3-16 3.5.10 Input A and B AC Voltage Accuracy Test ... 3-18 3.5.11 Input A and B AC Input Coupling Test ... 3-19 3.5.12 Input A and B Volts Peak Measurements Test ... 3-20 3.5.13 Input A and B Phase Measurements Test ... 3-21 3.5.14 Harmonics (Fluke 125) ... 3-21 3.5.15 Input A and B High Voltage AC/DC Accuracy Test ... 3-22 3.5.16 Resistance Measurements Test ... 3-24 3.5.17 Continuity Function Test ... 3-25 3.5.18 Diode Test Function Test ... 3-26 3.5.19 Capacitance Measurements Test ... 3-26 3.5.20 Video Trigger Test ... 3-27 Calibration Adjustment ... 4-1 4.1 General ... 4-3 4.1.1 Introduction ... 4-3 4.1.2 Calibration number and date ... 4-3 4.1.3 General Instructions ... 4-3 4.2 Equipment Required For Calibration ... 4-4 4.3 Starting Calibration Adjustment ... 4-4 4.4 Contrast Calibration Adjustment ... 4-6 4.5 Warming Up & Pre-Calibration ... 4-7 4.6 Final Calibration ... 4-7 4.6.1 HF Gain Input A&B ... 4-7 4.6.2 Delta T Gain, Trigger Delay Time & Pulse Adjust Input A ... 4-9 4.6.3 Pulse Adjust Input B ... 4-10 4.6.4 Gain DMM (Gain Volt) ... 4-10 4.6.5 Volt Zero ... 4-12 4.6.6 Zero Ohm ... 4-12 4.6.7 Gain Ohm ... 4-13 4.6.8 Capacitance Gain Low and High ... 4-14 4.6.9 Capacitance Clamp & Zero ... 4-14 4.6.10 Capacitance Gain ... 4-15 4.7 Save Calibration Data and Exit ... 4-15 Disassembling the Test Tool ... 5-1 5.1. Introduction ... 5-3 5.2. Disassembling Procedures ... 5-3 5.1.1 Required Tools ... 5-3 5.2.2 Removing the Battery Pack ... 5-3 5.2.3 Removing the Bail ... 5-3 5.2.4 Opening the Test Tool ... 5-3 5.2.5 Removing the Main PCA Unit ... 5-5 5.2.6 Removing the Display Assembly ... 5-6 5.2.7 Removing the Keypad and Keypad Foil ... 5-6 5.3 Disassembling the Main PCA Unit ... 5-6 5.4 Reassembling the Main PCA Unit ... 5-8 5.5 Reassembling the Test Tool ... 5-8 List of Replaceable Parts ... 6-1 6.1 Introduction ... 6-3 6.2 How to Obtain Parts ... 6-3 6.3 Service Centers ... 6-3 6.4 Final Assembly Parts ... 6-4 6.5 Main PCA Unit Parts ... 6-6 6.6 Service Tools ... 6-7

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1 Safety Instructions ... 1-1 1.1 Introduction ... 1-3 1.2 Safety Precautions ... 1-3 1.3 Caution and Warning Statements ... 1-3 1.4 Symbols ... 1-3 1.5 Impaired Safety ... 1-4 1.6 General Safety Information ... 1-4 2 Characteristics ... 2-1 2.1 Introduction ... 2-3 2.2 Dual Input Oscilloscope ... 2-3 2.2.1 Vertical ... 2-3 2.2.2 Horizontal ... 2-4 2.2.3 Trigger ... 2-4 2.2.4 Advanced Scope Functions ... 2-5 2.3 Dual Input Meter ... 2-5 2.3.1 Input A and Input B ... 2-5 2.3.2 Input A ... 2-8 2.3.3 Advanced Meter Functions ... 2-8 2.4 Miscellaneous ... 2-9 2.5 Environmental ... 2-10 2.6 Service and Maintenance ... 2-11 2.7 Safety ... 2-11 2.8 EMC Immunity ... 2-12 3 Circuit Descriptions ... 3-1 3.1 Introduction ... 3-3 3.2 Block Diagram ... 3-3 3.2.1 Channel A, Channel B Measurement Circuits ... 3-4 3.2.2 Trigger Circuit ... 3-4 3.2.3 Digital Circuit ... 3-5 3.2.4 Power Circuit ... 3-6 3.2.5 Start-up Sequence, Operating Modes ... 3-7 3.3 Detailed Circuit Descriptions ... 3-9 3.3.1 Power Circuit ... 3-9 3.3.2 Channel A - Channel B Measurement Circuits ... 3-15 3.3.3 Trigger Circuit ... 3-20 3.3.4 Digital Circuit ... 3-25 4 Performance Verification ... 4-1 4.1 Introduction ... 4-3 4.2 Equipment Required For Verification ... 4-3 4.3 How To Verify ... 4-3 4.4 Display and Backlight Test ... 4-4 4.5 Input A and Input B Tests ... 4-5 4.5.1 Input A and B Base Line Jump Test ... 4-6 4.5.2 Input A Trigger Sensitivity Test ... 4-7 4.5.3 Input A Frequency Response Upper Transition Point Test ... 4-8 4.5.4 Input A Frequency Measurement Accuracy Test ... 4-8 4.5.5 Input B Frequency Measurement Accuracy Test ... 4-9 4.5.6 Input B Frequency Response Upper Transition Point Test ... 4-10 4.5.7 Input B Trigger Sensitivity Test ... 4-10 4.5.8 Input A and B Trigger Level and Trigger Slope Test ... 4-11 4.5.9 Input A and B DC Voltage Accuracy Test ... 4-14 4.5.10 Input A and B AC Voltage Accuracy Test ... 4-15 4.5.11 Input A and B AC Input Coupling Test ... 4-16 4.5.12 Input A and B Volts Peak Measurements Test ... 4-17 4.5.13 Input A and B Phase Measurements Test ... 4-18 4.5.14 Input A and B High Voltage AC/DC Accuracy Test ... 4-19 4.5.15 Resistance Measurements Test ... 4-20 4.5.16 Continuity Function Test ... 4-21 4.5.17 Diode Test Function Test ... 4-22 4.5.18 Capacitance Measurements Test ... 4-22 4.5.19 Video Trigger Test ... 4-23 5 Calibration Adjustment ... 5-1 5.1 General ... 5-3 5.1.1 Introduction ... 5-3 5.1.2 Calibration number and date ... 5-3 5.1.3 General Instructions ... 5-3 5.2 Equipment Required For Calibration ... 5-4 5.3 Starting Calibration Adjustment ... 5-4 5.4 Contrast Calibration Adjustment ... 5-6 5.5 Warming Up & Pre-Calibration ... 5-7 5.6 Final Calibration ... 5-7 5.6.1 HF Gain Input A&B ... 5-7 5.6.2 Delta T Gain, Trigger Delay Time & Pulse Adjust Input A ... 5-9 5.6.3 Pulse Adjust Input A (firmware V01.00 only) ... 5-10 5.6.4 Pulse Adjust Input B ... 5-11 5.6.5 Gain DMM (Gain Volt) ... 5-11 5.6.6 Volt Zero ... 5-13 5.6.7 Zero Ohm (firmware V01.00 only) ... 5-13 5.6.8 Gain Ohm ... 5-14 5.6.9 Capacitance Gain Low and High ... 5-15 5.6.10 Capacitance Clamp & Zero ... 5-15 5.6.11 Capacitance Gain ... 5-16 5.7 Save Calibration Data and Exit ... 5-16 6 Disassembling the Test Tool ... 6-1 6.1. Introduction ... 6-3 6.2. Disassembling Procedures ... 6-3 6.1.1 Required Tools ... 6-3 6.2.2 Removing the Battery Pack ... 6-3 6.2.3 Removing the Bail ... 6-3 6.2.4 Opening the Test Tool ... 6-3 6.2.5 Removing the Main PCA Unit ... 6-5 6.2.6 Removing the Display Assembly ... 6-6 6.2.7 Removing the Keypad and Keypad Foil ... 6-6 6.3 Disassembling the Main PCA Unit ... 6-6 6.4 Reassembling the Main PCA Unit ... 6-8 6.5 Reassembling the Test Tool ... 6-8 7 Corrective Maintenance ... 7-1 7.1 Introduction ... 7-3 7.2 Starting Fault Finding. ... 7-4 7.3 Charger Circuit ... 7-4 7.4 Starting with a Dead Test Tool ... 7-6 7.4.1 Test Tool Completely Dead ... 7-6 7.4.2 Test Tool Software Does not Run. ... 7-7 7.4.3 Software Runs, Test Tool not Operative ... 7-7 7.5 Miscellaneous Functions ... 7-8 7.5.1 Display and Back Light ... 7-8 7.5.2 Fly Back Converter ... 7-9 7.5.3 Slow ADC ... 7-10 7.5.4 Keyboard ... 7-11 7.5.5 Optical Port (Serial RS232 Interface) ... 7-11 7.5.6 Channel A, Channel B Voltage Measurements ... 7-12 7.5.7 Channel A Ohms and Capacitance Measurements ... 7-13 7.5.8 Trigger Functions ... 7-14 7.5.9 Reference Voltages ... 7-15 7.5.10 Buzzer Circuit ... 7-15 7.5.11 Reset ROM Circuit (PCB version <8 only) ... 7-16 7.5.12 RAM Test ... 7-16 7.5.13 Power ON/OFF ... 7-16 7.5.14 PWM Circuit ... 7-17 7.5.15 Randomize Circuit ... 7-17 7.6 Loading Software ... 7-17 8 List of Replaceable Parts ... 8-1 8.1 Introduction ... 8-3 8.2 How to Obtain Parts ... 8-3 8.3 Final Assembly Parts ... 8-4 8.4 Main PCA Unit Parts ... 8-6 8.5 Main PCA Parts ... 8-7 8.6 Accessory Replacement Parts ... 8-24 8.7 Service Tools ... 8-24 9 Circuit Diagrams ... 9-1 9.1 Introduction ... 9-3 9.2 Schematic Diagrams ... 9-4 10 Modifications ... 10-1 10.1 Software modifications ... 10-1 10.2 Hardware modifications ... 10-1

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