Tektronix TDS2012

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Operating Information

TDS1000 and TDS2000 Series Digital Storage Oscilloscopes Service Manual

2-- 3

H RS-232, GPIB, and Centronics ports with the optional TDS2CMA Commu-

nications Extension Module

H User interface in ten user-selectable languages

Main Page

Table of Contents6
General Safety Summary12
Service Safety Summary14
Environmental Considerations16
Preface18
Related Manuals18
Specifications20
Table 1- 1: Oscilloscope Specifications22
Certifications and Compliances29
Table 1- 2: Oscilloscope General Specifications29
Operating Information32
General Features35
Installation37
Power Cord37
Security Loop37
Figure 2- -1: Routing the Power Cord and Security Cable37
Extension Modules38
Figure 2- -2: Installing and Removing an Extension Module38
Functional Check39
Self Calibration40
Default Setup40
Table 2- -1: Default Settings40
Theory of Operation44
Figure 3- -1: Module-Level Block Diagram (Two Channel)47
Figure 3- -2: Module-Level Block Diagram (Four Channel)48
Main Board49
Acquisition System49
Input Signal Interface50
Probe Compensation50
External Trigger50
Main Board Power50
Power Supply51
Display Module51
Front Panel51
Leds52
Extension Modules52
Performance Verification54
Required Equipment56
Test Record57
Performance Verification Procedures58
Self Test58
Self Calibration58
Check DC Gain Accuracy58
Check Bandwidth60
Check Sample Rate and Delay Time Accuracy61
Check Edge Trigger Sensitivity62
Adjustment Procedures66
Required Equipment68
Table 5- -1: Required Equipment68
Adjustment Procedure70
Enable the Service Menu70
Figure 5- -1: Adjustment Setups71
Adjustment Procedure72
Table 5- -2: Adjustment Steps73
Maintenance78
Preparation80
Preventing ESD80
Inspection and Cleaning81
General Care81
Inspection and Cleaning Procedures81
Table 6- -1: Internal Inspection Check List82
Removal and Installation Procedures84
Preparation84
List of Modules84
Summary of Procedures85
Required Tools85
Rear Feet85
Table 6- -2: List of Procedures85
Figure 6- -1: Removing the Rear Feet86
Figure 6- -2: Installing the Rear Feet87
Flip Feet88
Figure 6- -3: Removing and Installing the Flip Feet88
Front-Panel Knobs89
Power Button89
Rear Case90
Figure 6- -4: Removing and Installing the Rear Case90
Figure 6- -5: Aligning the Oscilloscope Rear Case92
Front Feet93
Figure 6- -6: Removing and Installing the Front Feet93
Figure 6- -7: Removing the Power Supply Module94
Power Supply Module95
Figure 6- -8: Installing the Power Supply Module95
Internal Assembly96
Figure 6- -9: Removing and Installing the Internal Assembly96
Display Cable98
Figure 6- -10: Removing the Display Cable98
Figure 6- -11: Installing the Display Cable99
Front-Panel Cable100
Figure 6- -12: Removing and Installing the Front-Panel Cable100
Main Board Module101
Figure 6- -13: Main Board Removal102
Display Module103
Figure 6- -14: Removing the Display Module103
Figure 6- -15: Installing the Display Module104
Front-Panel Module105
Figure 6- -16: Removing the Front-Panel Module105
Figure 6- -17: Installing the Front-Panel Module106
Keypad107
Front Case107
Figure 6- -18: Removing and Installing the Keypad107
Troubleshooting110
Adjustment after Repair110
Figure 6- -19: Oscilloscope Troubleshooting Tree (1111
Figure 6- -20: Oscilloscope Troubleshooting Tree (2112
Figure 6- -21: Oscilloscope Troubleshooting Tree (3113
Troubleshooting Tree114
PROBE COMP Output114
Troubleshooting the Power Supply114
Troubleshooting the Display115
Troubleshooting the Backlight117
Figure 6- -22: Measuring the Backlight Voltage118
Troubleshooting the Front Panel119
Troubleshooting the Main Board122
Running Diagnostics122
Troubleshooting Input Connections122
Using the Error Log123
Table 6- -3: List of Error Codes123
Repackaging Instructions125
Packaging125
Storage125
Figure 7- -1: TDS1000 and TDS2000 Series Block Diagram129
Replaceable Parts130
Parts Ordering Information132
Module Servicing132
Using the Replaceable Parts List133
Abbreviations133
Table 8- -1: Parts List Column Descriptions133
Mfr. Code to Manufacturer Cross Index134
Table 8- -2: Manufacturers Cross Index134
Table 8- -3: Replaceable Parts List135
Figure 8- -1: Exploded Diagram138
Table 8- -4: Replaceable Standard Accessories139
Table 8- -5: Replaceable Optional Accessories139

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