YOKOGAWA DL1720E, Service Manual

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SM 701730-01E
Contents
Safety Precautions .................................................................................................................. ii
Overview of This Manual ........................................................................................................ iv
Chapter 1 Principles of Operation
1.1 Block Diagram .......................................................................................................... 1-1
1.2 Function of Each Assembly ...................................................................................... 1-2
1.3 Function of Each ASIC ............................................................................................. 1-6
Chapter 2 Performance Testing
2.1 Introduction .............................................................................................................. 2-1
2.2 Tests for the DL1720E/DL1740E/DL1740EL ........................................................... 2-2
2.2.1 Grounding Test ............................................................................................. 2-3
2.2.2 Insulation Resistance Test ............................................................................ 2-4
2.2.3 Withstand Voltage ......................................................................................... 2-4
2.2.4 Selftest .......................................................................................................... 2-4
2.2.5 GP-IB Test .................................................................................................... 2-5
2.2.6 Rear Panel Probe Power Supply Test .......................................................... 2-6
2.2.7 LINE Trigger, Trigger LED, and Hold Off Test ............................................... 2-6
2.2.8 Probe Compensation Output and Auto Setup Test ....................................... 2-6
2.2.9 Timebase Accuracy Test ............................................................................... 2-7
2.2.10 Input Signal Bandwidth ................................................................................. 2-7
2.2.11 Trigger Sensitivity Test .................................................................................. 2-8
2.2.12 Offset Accuracy ............................................................................................. 2-8
2.2.13 DC Accuracy ................................................................................................. 2-9
2.2.14 EXT Trigger Level Accuracy Test ................................................................ 2-10
2.2.15 EXT Trigger Sensitivity and Trigger Out Test .............................................. 2-11
2.2.16 EXT Clock Input Test .................................................................................. 2-12
Chapter 3 Adjustments
3.1 Introduction .............................................................................................................. 3-1
3.2 Test Environment ..................................................................................................... 3-2
3.3 Equipment Required ................................................................................................ 3-3
3.4 DC Offset Adjustment on the AD Board ................................................................... 3-4
3.5 Flatness Adjustment on the Analog Board ............................................................... 3-7
Chapter 4 Troubleshooting
4.1 Introduction .............................................................................................................. 4-1
4.2 Flow Chart ................................................................................................................ 4-2
4.3 Assemblies to Check When an Error Occurs ........................................................... 4-3
4.4 Power Supply Secondary Voltage ............................................................................ 4-6
Chapter 5 Schematic Diagram
5.1 Schematic Diagram .................................................................................................. 5-1
Chapter 6 Customer Maintenance Parts List
6.1 Customer Maintenance Parts List ............................................................................ 6-1
6.2 Standard Accessories .............................................................................................. 6-5
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