Agilent Technologies 2000 X-Series User manual

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Agilent InfiniiVision
2000/3000 X-Series
Oscilloscopes
Service Guide

2000/3000 X-Series Oscilloscopes Service Guide
Notices
© Agilent Technologies, Inc. 2008-2013
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tronic storage and retrieval or translation
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Manual Part Number
75019-97084, June 2013
Print History:
75019-97012, January 2011
75019-97015, July 2011
75019-97038, October 2011
75019-97039, February 2012
75019-97084, June 2013
Available in electronic format only
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Colorado Springs, CO 80907 USA
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Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated condi-
tions are fully understood and
met.
A newer version of this manual
may be available at
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3000X-Series-manual
Microsoft ®is a U.S. registered trademark
of Microsoft Corporation.

2000/3000 X-Series Oscilloscopes Service Guide 3
In This Service Guide
This book provides the service information for the Agilent
2000/3000 X- Series oscilloscopes. This manual is divided
into these chapters:
1 Characteristics and Specifications
This chapter contains a partial list of characteristics and
specifications for the Agilent InfiniiVision
2000/3000 X- Series oscilloscopes.
2TestingPerformance
This chapter explains how to verify correct oscilloscope
operation and perform tests to ensure that the oscilloscope
meets the performance specifications.
3 Calibrating and Adjusting
This chapter explains how to adjust the oscilloscope for
optimum operating performance.
4Troubleshooting
This chapter begins with suggestions for solving general
problems that you may encounter with the oscilloscope.
Procedures for troubleshooting the oscilloscope follow the
problem solving suggestions.
5ReplacingAssemblies
This chapter describes how to remove assemblies from the
2000/3000 X- Series oscilloscope.
6ReplaceableParts
This chapter describes how to order replaceable assemblies
and parts for the Agilent 2000/3000 X- Series oscilloscopes.
It includes diagrams and parts lists for hardware that you
can order.

4 2000/3000 X-Series Oscilloscopes Service Guide
7SafetyNotices
At the front of the book you will find safety notice
descriptions and document warranties.
Digital Channels
Because all of the oscilloscopes in the Agilent 2000/3000 X-Series have analog
channels, the analog channel topics in this book apply to all instruments.
Whenever a topic discusses the digital channels, that information applies only to
Mixed-Signal Oscilloscope (MSO) models or DSO models that have been
upgraded to an MSO.
Abbreviated instructions for pressing a series of keys
Instructions for pressing a series of keys are written in an abbreviated manner.
Instructions for pressing Key1, then pressing Softkey2, then pressing Softkey3 are
abbreviated as follows:
Press [Key1] & Softkey2 & Softkey3.
The keys may be front panel keys, or softkeys, which are located directly below
the oscilloscope display.

2000/3000 X-Series Oscilloscopes Service Guide 5
Contents
In This Service Guide 3
Figures 9
Tables 13
1 Characteristics and Specifications 15
Power Requirements 16
Measurement Category 17
Measurement Category 17
Measurement Category Definitions 17
Transient Withstand Capability 18
Environmental Conditions 19
Specifications 20
Contact us 21
2TestingPerformance23
Overview 24
List of Test Equipment 25
Conventions 26
To construct the test connector (for use with MSO models
only) 27
To test digital channels (MSO models only) 29
To verify digital channel threshold accuracy (MSO models
only) 30
When to Test 30

6 2000/3000 X-Series Oscilloscopes Service Guide
Contents
What to Test 30
Verifying Test Results 30
To verify DC vertical gain accuracy 35
To verify dual cursor accuracy 42
To verify bandwidth (-3 dB) 49
To verify time base accuracy 55
To verify trigger sensitivity 57
Test Internal Trigger Sensitivity (all models) 58
Test External Trigger Sensitivity 60
Agilent 2000 X-Series Oscilloscopes Performance Test Record 63
Agilent 3000 X-Series Oscilloscopes Performance Test Record 65
3 Calibrating and Adjusting 67
User Calibration 69
To perform User Cal 69
User Cal Status 72
4Troubleshooting73
Solving General Problems with the Oscilloscope 74
If there is no display 74
If there is no trace display 75
If the trace display is unusual or unexpected 75
If you cannot see a channel 76
Verifying Basic Operation 77
To power-on the oscilloscope 77
To perform hardware self test 78
To perform front panel self test 78
To verify default setup 79
To perform an Auto Scale on the Probe Comp signal 80
To compensate passive probes 81

Contents
2000/3000 X-Series Oscilloscopes Service Guide 7
Troubleshooting Internal Assemblies 83
Equipment Required for Troubleshooting Internal
Assemblies 83
To prepare for internal assembly troubleshooting 84
Flowchart for Troubleshooting Internal Assemblies 87
System Board Drawings 88
To check the system board power supply test points 90
To check the interboard supply connector voltages 91
To check the line filter board AC output 93
To check the power switch 95
To check the power supply DC output 96
To check the display supplies 97
To check the keyboard supplies 98
To check the fan 99
5ReplacingAssemblies101
To remove the front panel knobs 104
To remove the bucket assembly 105
To remove the power supply shield 107
To remove the rear deck assembly 110
To remove the acquisition board 117
To remove the front panel assembly 122
To remove the display assembly 129
Replacing a 75019-68712 Display Assembly 131
To remove the fan assembly 134
To remove the power supply 136
To remove the line filter board 139
6ReplaceableParts145
Ordering Replaceable Parts 146

8 2000/3000 X-Series Oscilloscopes Service Guide
Contents
Listed Parts 146
Unlisted Parts 146
Direct Mail Order System 146
Exchange Assemblies 147
Exploded Views 148
Replaceable Parts List 150
7SafetyNotices157
Warnings 157
To clean the instrument 158
Safety Symbols 159
Index 161

2000/3000 X-Series Oscilloscopes Service Guide 9
Figures
Figure 1. Constructing the 8-by-2 Connector 28
Figure 2. Setting Up Equipment for Digital Channel Threshold
Accuracy Test 32
Figure 3. Setting up Equipment for DC Vertical Gain Accuracy
Test 39
Figure 4. Using a Blocking Capacitor to Reduce Noise 41
Figure 5. Setting up Equipment for Dual Cursor Accuracy Test 46
Figure 6. Using a Blocking Capacitor to Reduce Noise 48
Figure 7. Setting Up Equipment for Bandwidth (-3 dB) Verification
Test 51
Figure 8. Setting Up Equipment for Internal Trigger Sensitivity
Test 58
Figure 9. Setting Up Equipment for 4-Channel External Trigger
Sensitivity Test 61
Figure 10. User Calibration cable for 2-channel oscilloscope 70
Figure 11. User Calibration cable for 4-channel oscilloscope 71
Figure 12. Default setup screen 80
Figure 13. Example pulses 82
Figure 14. Setup for troubleshooting internal assemblies 85
Figure 15. System Board Test Points/Connectors - Top Side,
Left 88
Figure 16. System Board Test Points/Connectors - Top Side,
Right 89
Figure 17. Line filter board interboard supply connector J108 92
Figure 18. Verify line filter board AC output 94
Figure 19. Verify power switch operation 95
Figure 20. Location of the Fan Connector 100
Figure 21. Removing the front panel knobs 104
Figure 22. Removing the bucket screws 105
Figure 23. Removing bucket assembly 106

10 2000/3000 X-Series Oscilloscopes Service Guide
Figures
Figure 24. Removing the power supply shield screw 107
Figure 25. Unclipping the power supply shield right side 108
Figure 26. Removing the power supply shield - lift and pull
out 109
Figure 27. Removing the BNC nuts and washers 110
Figure 28. Removing the top rear deck screws 111
Figure 29. Removing the bottom right rear deck screw 111
Figure 30. Removing the bottom left rear deck screw 112
Figure 31. Removing the bottom rear deck screws 112
Figure 32. Removing the option module guide to acquisition board
screw 113
Figure 33. Disconnecting the interboard supply cable from the
acquisition board 114
Figure 34. Lifting front bezel latch 115
Figure 35. Separating the rear and front decks 116
Figure 36. Rear and front decks separated 116
Figure 37. Removing the T6 screws (4 channel version) 117
Figure 38. Disconnecting keyboard and display cables from
acquisition board 118
Figure 39. Disconnecting display backlight power cable from
acquisition board 119
Figure 40. Acquisition board mounting screw locations 120
Figure 41. Acquisition board removed from front deck 121
Figure 42. Release the bezel clips from the front deck 122
Figure 43. All bezel clips released 123
Figure 44. HINT: When reinstalling bezel, align ground terminal
first 123
Figure 45. Gently lift front deck from bezel 124
Figure 46. Disconnect the keyboard cable 125
Figure 47. Disconnect the softkey board cable 126
Figure 48. Unclip the softkey board from the bezel 127
Figure 49. Remove the softkey keypad from the bezel 127
Figure 50. Unclip the keyboard board from the bezel 128
Figure 51. Remove the keyboard keypad from the bezel 128