7000 service guide.
7000 service guide.book Page 2 Thursday, October 16, 2008 12:18 PM Notices © Agilent Technologies, Inc. 2009 Warranty No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws.
7000 service guide.book Page 3 Thursday, October 16, 2008 12:18 PM In This Service Guide This book provides the service information for the Agilent 7000 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 7000 Series Oscilloscopes.
7000 service guide.book Page 4 Thursday, October 16, 2008 12:18 PM Digital Channels Because all of the oscilloscopes in the Agilent 7000 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.
7000 service guide.
7000 service guide.
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7000 service guide.
7000 service guide.book Page 9 Thursday, October 16, 2008 12:18 PM Figures Figure 1. Constructing the 8-by-2 Connector 27 Figure 2. Setting Up Equipment for Digital Channel Threshold Accuracy Test 31 Figure 3. Setting up Equipment for Voltage Measurement Accuracy Test 36 Figure 4. Using a Blocking Capacitor to Reduce Noise 37 Figure 5. Setting Up Equipment for Bandwidth Verification Test 40 Figure 6. Setting Up Equipment for Internal Trigger Sensitivity Test 49 Figure 7.
7000 service guide.book Page 10 Thursday, October 16, 2008 12:18 PM Figures Figure 24. Removal of inverter board 92 Figure 25. Removing cable shield 93 Figure 26. Removing keyboard cables 93 Figure 27. Removing knobs 94 Figure 28. Removing the bezel 94 Figure 29. Removal of softkey board 95 Figure 30. Removing front panel assembly from front deck 96 Figure 31. Front panel assembly separated from front deck 96 Figure 32. Separating front panel from printed circuit board 97 Figure 33.
7000 service guide.book Page 11 Thursday, October 16, 2008 12:18 PM Tables Table 1. Table 2. Table 3. Table 4. List of test equipment 23 Conventions 25 Materials required to construct the test connectors 26 Equipment Required to Test Digital Channel Threshold Accuracy 30 Table 5. Threshold Accuracy Voltage Test Settings 32 Table 6. Equipment Required to Verify Voltage Measurement Accuracy 34 Table 7. Settings Used to Verify Voltage Measurement Accuracy 35 Table 8.
7000 service guide.
7000 service guide.book Page 13 Thursday, October 16, 2008 12:18 PM Agilent InfiniiVision 7000 Series Oscilloscope Service Guide 1 Characteristics and Specifications Power Requirements 14 Measurement Category 15 Environmental Conditions 17 Specifications 18 Contact us 19 This chapter contains a partial list of characteristics and specifications for the Agilent InfiniiVision 7000 Series Oscilloscopes.
7000 service guide.
7000 service guide.book Page 15 Thursday, October 16, 2008 12:18 PM Characteristics and Specifications 1 Measurement Category Measurement Category The InfiniiVision 7000 Series oscilloscope is intended to be used for measurements in Measurement Category I. WA R N I N G Use this instrument only for measurements within its specified measurement category. Measurement Category Definitions Measurement category I is for measurements performed on circuits not directly connected to MAINS.
7000 service guide.book Page 16 Thursday, October 16, 2008 12:18 PM 1 Characteristics and Specifications Transient Withstand Capability CAUTION Maximum input voltage for analog inputs CAT I 300 Vrms, 400 Vpk; transient overvoltage 1.6 kVpk CAT II 100 Vrms, 400 Vpk with 10073C or 10074C 10:1 probe: CAT I 500 Vpk, CAT II 400 Vpk CAUTION CAUTION Do not exceed 5 Vrms in 50 Ω mode. Input protection is enabled in 50 Ω mode, and the 50 Ω load will disconnect if greater than 5 Vrms is detected.
7000 service guide.book Page 17 Thursday, October 16, 2008 12:18 PM Characteristics and Specifications 1 Environmental Conditions Environment Indoor use only.
7000 service guide.book Page 18 Thursday, October 16, 2008 12:18 PM 1 Characteristics and Specifications Specifications Please see the InfiniiVision 7000 Series Oscilloscopes Data Sheet for complete, up-to-date specifications and characteristics. To download a copy of the data sheet please visit: www.agilent.com/find/7000. Or go to the Agilent home page at www.agilent.com and search for 7000 series oscilloscopes data sheet. To order a data sheet by phone, please contact your local Agilent office.
7000 service guide.
7000 service guide.
7000 service guide.
7000 service guide.book Page 22 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Overview To completely test and troubleshoot MSO models, create and use the test connector accessory as described in this chapter. • The test connector is only required for oscilloscopes that have the MSO option licensed (enabled). • The connector is used in the digital channel threshold accuracy test.
7000 service guide.book Page 23 Thursday, October 16, 2008 12:18 PM Testing Performance 2 List of Test Equipment Below is a list of test equipment and accessories required to perform the performance test verification procedures. Table 1 List of test equipment Equipment Critical Specifications Recommended Model/ Part Number Test connector, 8-by-2* See page 26 for instructions on building test connector. n/a Digital Multimeter 0.1 mV resolution, 0.
7000 service guide.book Page 24 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Table 1 List of test equipment Equipment Critical Specifications Recommended Model/ Part Number Feedthrough 50Ω BNC (f) to BNC (m) Agilent 0960-0301 * Required only for testing digital channels of oscilloscopes that have the MSO option. Most parts and equipment are available at www.agilent.com. See respective manufacturer’s websites for their equipment. † These parts available at www.parts.agilent.
7000 service guide.book Page 25 Thursday, October 16, 2008 12:18 PM Testing Performance 2 Fluke MET/CAL Procedures Fluke MET/CAL procedures are available for the 7000 Series oscilloscopes. The MET/CAL badge with “PROCEDURES AVAILABLE” signifies that Fluke has created Warranted MET/CAL procedures to verify the performance of this instrument using MET/CAL metrology software. These procedures can be obtained from Fluke. Please see http://www.fluke.com and search for MET/CAL for more information.
7000 service guide.book Page 26 Thursday, October 16, 2008 12:18 PM 2 Testing Performance To construct the test connector (for use with MSO models only) Agilent 7000 Series Oscilloscopes that have digital channels enabled require the test connector described below. Follow the steps to build the test connector. Table 3 Materials required to construct the test connectors Description Recommended Part Qty BNC (f) Connector Agilent 1250-1032 or Pomona 4578 1 Berg Strip, 8-by-2 3M .100” x .
7000 service guide.
7000 service guide.book Page 28 Thursday, October 16, 2008 12:18 PM 2 Testing Performance To test digital channels (MSO models only) The acquisition system testing provides confidence that the acquisition system is functioning correctly. It does not, however, check a particular specification. 1 Disconnect all probes from the circuit under test and from any other input source.
7000 service guide.book Page 29 Thursday, October 16, 2008 12:18 PM Testing Performance 2 To verify digital channel threshold accuracy (MSO models only) This test verifies the digital channel threshold accuracy specification of the Agilent 7000 Series Oscilloscopes. Threshold accuracy test limits = ±(100 mV + 3% of threshold setting) When to Test You should perform this test every 12 months or after 2000 hours of operation, whichever comes first.
7000 service guide.book Page 30 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Table 4 Equipment Required to Test Digital Channel Threshold Accuracy Equipment Critical Specifications Recommended Model/Part Digital Multimeter 0.1 mV resolution, 0.005% accuracy Agilent 34401A Oscilloscope Calibrator DC offset voltage 6.
7000 service guide.book Page 31 Thursday, October 16, 2008 12:18 PM Testing Performance 2 7000A Series Oscilloscope Oscilloscope Calibrator Digital Multimeter BNC Tee Channels 8 - 15 BNC-Banana cable Probe Cables Channels 0-7 Test Connector Figure 2 Setting Up Equipment for Digital Channel Threshold Accuracy Test 4 Use a BNC-banana cable to connect the multimeter to the other side of the BNC Tee. 5 Connect the BNC Tee to the Channel 1 output of the calibrator as shown in Figure 2.
7000 service guide.book Page 32 Thursday, October 16, 2008 12:18 PM 2 Testing Performance oscilloscope to set the threshold test settings as shown in Table 5. Table 5 Threshold Accuracy Voltage Test Settings Threshold voltage setting (in oscilloscope User softkey) DC offset voltage setting (on oscilloscope calibrator) +5.00 V +5.250 V ±1 mV dc Lower limit = +4.750 V Upper limit = +5.250 V –5.00 V –4.750 V ±1 mV dc Lower limit = –5.250 V Upper limit = –4.750 V 0.
7000 service guide.book Page 33 Thursday, October 16, 2008 12:18 PM Testing Performance 2 Before proceeding to the next step, make sure that you have recorded the oscilloscope calibrator voltage levels for each of the threshold settings shown in Table 5. 9 Use the 8-by-2 test connector to connect digital channels D15-D8 to the output of the oscilloscope calibrator. Then connect the D15-D8 ground lead to the ground side of the 8-by-2 connector.
7000 service guide.book Page 34 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Table 6 Equipment Required to Verify Voltage Measurement Accuracy Equipment Critical Specifications Recommended Model/Part Oscilloscope Calibrator 14 mV to 35 Vdc, 0.1 V resolution Fluke 5820A Digital multimeter Better than 0.
7000 service guide.book Page 35 Thursday, October 16, 2008 12:18 PM Testing Performance Table 7 Settings Used to Verify Voltage Measurement Accuracy Volts/Div Setting Oscilloscope Calibrator Setting Test Limits 5 V/Div 35 V 34.04 V to 35.96 V 2 V/Div 14 V 13.616 V to 14.384 V 1 V/Div 7V 6.808 V to 7.192 V 500 mV/Div 3.5 V 3.404 V to 3.596 V 200 mV/Div 1.4 V 1.3616 V to 1.4384 V 100 mV/Div 700 mV 680.8 mV to 719.2 mV 50 mV/Div 350 mV 340.4 mV to 359.
7000 service guide.book Page 36 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Oscilloscope Oscilloscope Calibrator BNC Tee Digital Multimeter BNC (f) to dual banana adapter Figure 3 Setting up Equipment for Voltage Measurement Accuracy Test 4 Adjust the output so that the multimeter reading displays the first Volts/div calibrator setting value in Table 7. Wait a few seconds for the measurement to settle.
7000 service guide.book Page 37 Thursday, October 16, 2008 12:18 PM Testing Performance 2 7 When you are finished checking all of the voltage values, disconnect the oscilloscope calibrator from the oscilloscope. 8 Repeat this procedure for the remaining channels to be tested. Use a Blocking Capacitor to Reduce Noise On the more sensitive ranges, such as 2 mV/div and 5 mV/div, noise may be a factor.
7000 service guide.book Page 38 Thursday, October 16, 2008 12:18 PM 2 Testing Performance To verify bandwidth This test checks the bandwidth of the oscilloscope. In this test you will use a signal generator and a power meter.
7000 service guide.book Page 39 Thursday, October 16, 2008 12:18 PM Testing Performance Table 8 2 Equipment Required to Verify Bandwidth Recommended Model/Part Equipment Critical Specifications Signal Generator 100 kHz - 1 GHz at 200 mVrms Agilent N5181A, E4400B, or 8648A Power Meter/Sensor 1 MHz - 1 GHz ±3% accuracy Agilent E4418B/8482A Power Splitter outputs differ by < 0.
7000 service guide.book Page 40 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Signal Generator Oscilloscope N to BNC adapter Power Splitter Power Sensor N Cable Power Meter Figure 5 Setting Up Equipment for Bandwidth Verification Test 2 Set up the power meter. Set the power meter to display measurements in units of watts.
7000 service guide.book Page 41 Thursday, October 16, 2008 12:18 PM Testing Performance 2 3 Set up the oscilloscope. a Press the Save/Recall key, then press the Default Setup softkey. b Press the Acquire key, then press the Realtime softkey to unselect Realtime. c Set channel 1 Coupling to DC. d Set channel 1 Imped to 50 Ohm. e Set the time base to 500 ns/div. f Set the Volts/Div for channel 1 to 200 mV/div. g Press the Acquire key, then press the Averaging softkey.
7000 service guide.book Page 42 Thursday, October 16, 2008 12:18 PM 2 Testing Performance • 1 GHz Models: 1 GHz • 500 MHz Models: 500 MHz • 350 MHz Models: 350 MHz • 100 MHz Models: 100 MHz 10 Referencing the frequency from step 9, set the power meter Cal Factor % to the frequency value on the calibration chart on the power sensor.
7000 service guide.book Page 43 Thursday, October 16, 2008 12:18 PM Testing Performance 2 15 The result from step 14 should be between +3.0 dB and -3.0 dB. Record the result in the Performance Test Record (see page 57). 16 Move the power splitter from the channel 1 to the channel 2 input. 17 Turn off the current channel and turn on the next channel using the channel keys. 18 Repeat steps 3 through 17 for the remaining channels, setting the parameters of the channel being tested where appropriate.
7000 service guide.book Page 44 Thursday, October 16, 2008 12:18 PM 2 Testing Performance To verify time scale accuracy This test verifies the accuracy of the time scale. In this test you will measure the absolute error of the timebase oscillator and compare the results to the specification. Table 9 Equipment Required to Verify Time Scale Accuracy Recommended Model/Part Equipment Critical Specifications Signal Generator 100 kHz - 1 GHz, 0.
7000 service guide.book Page 45 Thursday, October 16, 2008 12:18 PM Testing Performance 2 4 Make the measurement. a Set oscilloscope horizontal sweep speed control to 1 ms/div. b Set horizontal position control to +1 ms (rotate control CCW). c Set the oscilloscope horizontal sweep speed control to 5 ns/div. d Record the number of nanoseconds from where the rising edge crosses the center horizontal grid line to the center vertical grid line.
7000 service guide.book Page 46 Thursday, October 16, 2008 12:18 PM 2 Testing Performance To verify horizontal delta t accuracy This test verifies the horizontal ∆t accuracy. In this test, you will use the oscilloscope to measure the output of a time mark generator. Test limits: ±0.0015% of reading ±0.
7000 service guide.book Page 47 Thursday, October 16, 2008 12:18 PM Testing Performance 2 4 Press the Quick Meas softkey, set the Source softkey to 1, then press Select and choose Period. Press the Measure softkey and measure the following: Period 100 µs — The test limits are 99.8 µs to 100.2 µs. If the measurements are not within the test limits, go to the “Troubleshooting” chapter. Then return here. 5 Change the calibrator to 100 ns markers. Change the time base to 20 ns/div.
7000 service guide.book Page 48 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Test limits for: • Internal trigger on all models: • < 10 mV/div: greater of 1 div or 5 mVpp >=10 mV/div: 0.6 div • External trigger on all 2-channel models (MSO/DSO7xx2A): • Trigger range: 1.0V DC to 100 MHz: < 100 mVpp >100 MHz to max bandwidth: < 200 mVpp • Trigger range: 8.
7000 service guide.book Page 49 Thursday, October 16, 2008 12:18 PM Testing Performance 2 Test Internal Trigger Sensitivity (all models) 1 Connect the equipment (see Figure 6). a Connect the signal generator output to the oscilloscope channel 1 input.
7000 service guide.book Page 50 Thursday, October 16, 2008 12:18 PM 2 Testing Performance 2 Verify the trigger sensitivity at maximum bandwidth. 1 GHz models: 1 GHz 500 MHz models: 500 MHz 350 MHz models: 350 MHz 100 MHz models: 100 MHz a Press the Save/Recall key, then press the Default Setup softkey. b Set channel 1 Imped to 50 Ohm. c Set the output frequency of the signal generator to the maximum bandwidth of the oscilloscope and set the amplitude to about 10 mVpp. d Press the AutoScale key.
7000 service guide.
7000 service guide.book Page 52 Thursday, October 16, 2008 12:18 PM 2 Testing Performance 1 Connect the equipment (see Figure 7). a Use the N cable to connect the signal generator to the power splitter input. b Connect one output of the power splitter to the Ext Trigger input. c Connect the power sensor to the other output of the power splitter.
7000 service guide.book Page 53 Thursday, October 16, 2008 12:18 PM Testing Performance 2 2 Set up the oscilloscope. a Press the Save/Recall key, then press the Default Setup softkey. b Set the External Trigger impedance to 50 Ohm. c Change the trigger Mode from Auto to Normal. d Use the Range softkey and the Entry knob to set the range to 1.0 V. 3 Verify the trigger sensitivity at maximum frequency.
7000 service guide.book Page 54 Thursday, October 16, 2008 12:18 PM 2 Testing Performance 4 Verify the trigger sensitivity at maximum frequency for trigger range of 8.0 V. a Press the Mode/Coupling key, press the External softkey, then press the Range softkey and use the Entry knob to set the range to 8.0 V. b Adjust the signal generator output for reading on the power meter of 625µW. (500mVpp = 176.78mV rms, Power = Vin2/50Ω = 176.78 mV2/50Ω = 625µW.
7000 service guide.book Page 55 Thursday, October 16, 2008 12:18 PM Testing Performance 2 1 Connect the equipment (see Figure 8). a Use the N cable to connect the signal generator to the power splitter input. b Connect one output of the power splitter to the Aux Trig input through a 50Ω feedthrough termination. c Connect the power sensor to the other output of the power splitter.
7000 service guide.book Page 56 Thursday, October 16, 2008 12:18 PM 2 Testing Performance 2 Set up the oscilloscope. a Press the Save/Recall key, then press the Default Setup softkey. 3 Change the signal generator output frequency to 500 MHz. 4 Set the power meter Cal Factor % to the appropriate value (500 MHz) on the calibration chart on the power sensor. If necessary, do a linear interpolation if a 500 MHz factor is not included in the power meter’s calibration chart.
7000 service guide.book Page 57 Thursday, October 16, 2008 12:18 PM Testing Performance 2 Agilent 7000 Series Oscilloscopes Performance Test Record Serial No. ______________________________________ Test Interval ____________________________________ Recommended Next Testing ________________________ Test by _____________________________ Work Order No. ______________________ Temperature ____________ Threshold Accuracy Test (100 mV + 3% of threshold setting) Limits 4.750 V 5.250 V -5.250 V -4.
7000 service guide.book Page 58 Thursday, October 16, 2008 12:18 PM 2 Testing Performance Horizontal ∆t Accuracy Generator Setting Period 100 µs Period 100 ns Period 5 ns Trigger Sensitivity Internal trigger 1 GHz models 500 MHz models 350 MHz models 100 MHz models Trigger Sensitivity Test Limits 99.8 µs to 100.2 µs 99.8 ns to 100.2 ns 4.96 ns to 5.04 ns Test Limits Results ________ ________ ________ Channel 1 Channel 2 Channel 3* Channel 4* 1 division at 25 MHz 0.6 division at 1 GHz 0.
7000 service guide.book Page 59 Thursday, October 16, 2008 12:18 PM Agilent InfiniiVision 7000 Series Oscilloscope Service Guide 3 Calibrating and Adjusting This chapter explains how to adjust the oscilloscope for optimum operating performance.
7000 service guide.book Page 60 Thursday, October 16, 2008 12:18 PM 3 Calibrating and Adjusting CAUTION CAUTION 60 USE EXTERNAL FAN TO REDUCE TEMPERATURE! When you must operate the oscilloscope with its cover and main shield removed, use an external fan to provide continuous air flow over the samplers (the ICs with heat sinks on them). Air flow over the samplers is reduced when the cover and main shield is removed, which leads to higher than normal operating temperatures.
7000 service guide.book Page 61 Thursday, October 16, 2008 12:18 PM Calibrating and Adjusting 3 User Calibration Perform user-calibration: • Each year or after 2000 hours of operation. • If the ambient temperature is >10° C from the calibration temperature. • If you want to maximize the measurement accuracy. The amount of use, environmental conditions, and experience with other instruments help determine if you need shorter User Cal intervals.
7000 service guide.book Page 62 Thursday, October 16, 2008 12:18 PM 3 Calibrating and Adjusting Use 50Ω RG58AU or equivalent BNC cables when performing User Cal. a For a 2-channel oscilloscope, connect a BNC tee to the equal length cables. Then connect a BNC(f)-to-BNC(f) (also called a barrel connector) to the tee as shown below.
7000 service guide.book Page 63 Thursday, October 16, 2008 12:18 PM Calibrating and Adjusting 3 BNC(f)-to-BNC(f) (barrel connector) to the tee as shown below. To Channel 1 To Channel 2 To Channel 3 To Channel 4 Figure 10 Longer cable to TRIG OUT User Calibration cable for 4-channel oscilloscope 3 Connect a BNC cable (40 inches maximum) from the TRIG OUT connector on the rear panel to the BNC barrel connector. 4 Press the Utility key, then press the Service softkey.
7000 service guide.book Page 64 Thursday, October 16, 2008 12:18 PM 3 Calibrating and Adjusting User Cal Status Pressing the User Cal Status softkey displays the following summary results of the previous User Cal, and the status of probe calibrations for probes that can be calibrated. Note that AutoProbes do not need to be calibrated, but InfiniiMax probes can be calibrated.
7000 service guide.book Page 65 Thursday, October 16, 2008 12:18 PM Agilent InfiniiVision 7000 Series Oscilloscope Service Guide 4 Troubleshooting This chapter begins with suggestions for solving general problems that you may encounter with the oscilloscope.
7000 service guide.book Page 66 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting Solving General Problems with the Oscilloscope This section describes how to solve general problems that you may encounter while using the Agilent 7000 Series Oscilloscopes to make measurements. After troubleshooting the oscilloscope, if you need to replace parts, refer to the “Replaceable Parts” chapter. If there is no display ✔ Check that the power cord is firmly seated in the oscilloscope power receptacle.
7000 service guide.book Page 67 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 ✔ The sampling speed of the oscilloscope depends on the time/division setting. It may be that when time/division is set to slower speeds, the oscilloscope is sampling too slowly to capture all of the transitions on the waveform. Use peak detect mode. ✔ Check that all oscilloscope probes are connected to the correct signals in the circuit under test.
7000 service guide.book Page 68 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting Performing the checks listed here ensures that the signals from the circuit under test will be seen by the oscilloscope. Perform the remaining checks in this topic to make sure the oscilloscope channels are on, and to obtain an automatic setup. ✔ Check that the desired oscilloscope channels are turned on. a Press the analog channel key until it is illuminated.
7000 service guide.book Page 69 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 Troubleshooting the Oscilloscope The service policy for the Agilent 7000 Series Oscilloscopes is assembly level replacement. If you need parts or assistance from Agilent Technologies to repair your instrument, go to www.agilent.com and locate the service facility for your area.
00 service guide.book Page 70 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting Equipment required for troubleshooting The equipment listed in this table is required to troubleshoot the oscilloscope. Table 12 Equipment Required to Troubleshoot the Oscilloscope Equipment Critical Specifications Recommended Model/Part Digital multimeter Accuracy ±0.05,% 1 mV resolution Agilent 34401A Oscilloscope Capable of measuring ≥ 500 MHz signal. 1 MΩ input impedance.
7000 service guide.book Page 71 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 3 Connect the power cord to the rear of the oscilloscope, then to a suitable ac voltage source. The oscilloscope power supply automatically adjusts for input line voltages in the range of 100 to 240 VAC. Ensure that you have the correct line cord (see page 105). The power cord provided is matched to the country of origin. WA R N I N G AVOID INJURY.
7000 service guide.book Page 72 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting To verify basic oscilloscope operation 1 Press the Save/Recall key on the front panel, then press the Default Setup softkey under the display. The oscilloscope is now configured to its default settings. 2 Connect an oscilloscope probe from channel 1 to the Probe Comp signal terminal on the front panel. 3 Connect the probe’s ground lead to the ground terminal that is next to the Probe Comp terminal. 4 Press AutoScale.
7000 service guide.book Page 73 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 To compensate the analog probes You should compensate your analog probes to match their characteristics to the oscilloscope’s channels. A poorly compensated probe can introduce measurement errors. 1 Perform the procedure “To verify basic oscilloscope operation” on page 72 2 Use a nonmetallic tool to adjust the trimmer capacitor on the probe for the flattest pulse possible.
7000 service guide.book Page 74 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting Troubleshooting Flowchart The following flowchart describes how to troubleshoot the oscilloscope.
7000 service guide.book Page 75 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 System board drawings Pin 1 + + + + - Pin 1 - - Pin 9 - 6 + - 6 + + - - - Refer to these two drawings to locate test points on the system board.
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7000 service guide.book Page 77 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 To check the 7000A Series oscilloscope power supply 1 Disconnect the power cord from the oscilloscope. Then remove the oscilloscope cover. CAUTION USE AN EXTERNAL FAN TO AVOID OVERHEATING COMPONENTS ! When you remove the oscilloscope cover and main shield, use an external fan to provide continuous air flow over the heat sinks.
7000 service guide.book Page 78 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting To check the 7000A Series system board 1 Remove the handle, tilt legs, and cabinet. 2 Check that all cable connections are securely connected from the system board to: • Power supply • Keyboard (7000A Series only) • Display (7000A Series only) • Inverter board (7000A Series only) • Fan 3 Verify the voltages at the system board test points listed in the table below.
7000 service guide.book Page 79 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 6 If all cables are properly connected and none of the previous tests confirm a failure on another assembly, replace the system board. To check the 7000A Series display 1 Disconnect the power cord. 2 Check to verify that the backlight inverter cable is connected. 3 Ensure the display LCD cable is connected. 4 Connect the power cord. 5 Use the DMM to check the Inverter Power voltage (see table below).
7000 service guide.book Page 80 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting To check the fan The fan speed is controlled by a circuit on the system board. 1 If the fan is running, perform the internal self-tests. Go to “To run the internal self-tests” on page 81. 2 If the fan is not running, it may be defective. Follow these steps: a Disconnect the fan cable from the system board. b Measure the fan voltage at the connector on the system board.
7000 service guide.book Page 81 Thursday, October 16, 2008 12:18 PM Troubleshooting 4 To run the internal self-tests Self Test performs a series of internal procedures to verify that the oscilloscope is operating properly.
7000 service guide.book Page 82 Thursday, October 16, 2008 12:18 PM 4 Troubleshooting • Trigger - Edge trigger, Auto sweep mode, 0 V level, channel 1 source, dc coupling, rising edge slope, 60 ns holdoff time • Display - Vectors on, 33% grid intensity, infinite persistence off • Other - Acquire mode normal, Run/Stop to Run, cursor measurements off Figure 15 Default setup screen 3 If your screen looks substantially different, replace the system board.
7000 service guide.book Page 83 Thursday, October 16, 2008 12:18 PM Agilent InfiniiVision 7000 Series Oscilloscope Service Guide 5 Replacing Assemblies This chapter describes how to remove assemblies from the Agilent 7000A Series Oscilloscopes. To install a replacement assembly after you have removed an old one, follow the instructions in reverse order. The parts shown in the following figures are representative and may look different from what you have in your oscilloscope.
7000 service guide.book Page 84 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies See how the Oscilloscope Parts Fit Together An exploded view of the oscilloscope is included in the “Replaceable Parts” chapter. It shows the individual part numbers used in the assemblies, and shows you how the parts fit together. Read All Warnings and Cautions Read the following warnings and cautions before removing and replacing any assemblies in the oscilloscope.
7000 service guide.book Page 85 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 Removing the Handle The Strap Handle must be removed prior to removing the cabinet. The removal of the Strap handle may also be necessary when mounting oscilloscope in a rack. 1 Using T20 TORX driver, remove the screws holding strap handle caps in place. 2 Lift Strap handle off cabinet.
7000 service guide.book Page 86 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies To remove the Adjustable Legs Adjustable legs must be removed prior to removing the cabinet. 1 Using a T20 TORX, remove shoulder screw and washer. 2 Pull adjustable leg assembly from cabinet. Assembly contains latching mechanism and spring.
7000 service guide.book Page 87 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 To remove Cabinet Removing the cabinet allows access to the rear deck, fan assembly, power supply cover, power supply assembly, and power switch assembly. 1 Using T20 TORX, remove the three screws securing cabinet to rear deck assembly. 2 Carefully slide cabinet back away from rear deck assembly.
7000 service guide.book Page 88 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies To remove the Rear Deck Assembly Removing the rear deck allows access to the front deck, acquisition board, and inverter board. 1 Using a T20 TORX, locate and remove all screws securing rear deck to front deck. 2 Remove BNC securing nuts and washers. Figure 19 Removing the rear deck assembly 3 Carefully separate rear deck from front deck. Take care not damage extender switch.
7000 service guide.book Page 89 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 4 Disconnect power harness and fan cable from acquisition board.
7000 service guide.book Page 90 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies To remove Acquisition and Inverter assemblies The following illustrates how to remove the Acquisition and Dual inverter printed circuit boards. 1 Using a TORK T6 driver locate and remove the 4 screws on the front of the instrument (4 Channel version). Figure 21 Removing the T6 screws 2 Disconnect Inverter, keyboard and display cables. Note locations for re-connection.
7000 service guide.book Page 91 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 3 Using a TORX T10 driver locate and remove 7 mounting screws. Adhesive cable restraints Note: when removing or replacing Acquisition board care should be taken so as not to damage grounding spring on front deck.
7000 service guide.book Page 92 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies 4 Carefully unlock the two alignment pins. Carefully lift acquisition board off front deck. Figure 23 Unlocking alignment pin 5 Using a TORX T10 driver locate and remove the two screws securing the Dual Inverter board to the front deck. 6 Disconnect all cables, lift board off front deck.
7000 service guide.book Page 93 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 To remove the Front Panel assembly 1 Remove cable shield from front deck. Carefully squeeze the shield so that it clears the sheet metal tabs holding it place then slide it free of the front deck: WA R N I N G Thin sheet metal parts may have sharp edges. Handle with care to avoid injury. Figure 25 Removing cable shield 2 Remove keyboard cables that extend thru front deck.
7000 service guide.book Page 94 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies 3 Carefully remove knobs from front panel. They may be gently pried loose with a flat head screw driver taking care not to scratch the faceplate, then pulled straight off. Figure 27 Removing knobs 4 Remove bezel from front deck. Bezel is secured to front deck by molded-in retaining clips located around the perimeter of the bezel. Gently pry these outward (either by hand or using a flat head screwdriver).
7000 service guide.book Page 95 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 5 To remove the Softkey board printed circuit board from the bezel, insure cable has been disconnected and slide board off alignment post.
7000 service guide.book Page 96 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies 6 To remove the front panel assembly carefully release front panel clips that secure front panel assembly to the front deck by pulling them clear of the sheet metal tabs or openings.
7000 service guide.book Page 97 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 7 To separate the front panel control board from the front panel carefully pull back locking tabs that secure the front panel to the printed circuit board. Figure 32 Separating front panel from printed circuit board 8 Once front panel is removed assembly can be separated into individual components (control board, front panel and keypad).
7000 service guide.book Page 98 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies 9 Using a TORX T10 remove the four screws that secure the display to the front deck. The upper right screw also secures the inverter cable shield. Take care while threading display cables thru front deck sheet metal openings. Display cable clips/strain reliefs must be disconnected prior to removing display assembly (see figure 22).
7000 service guide.book Page 99 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 To remove the Fan assembly 1 Insure that fan power cable has been disconnected from Acquisition board. 2 Carefully slide fan assembly (fan and fan mount) to the right, then lift away from rear deck. Note, fan mount is soft and can be damaged by sharp sheet metal edges. Take care that the fan power cable is not damaged when pulling across sheet metal edges.
7000 service guide.book Page 100 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies To remove the power supply shield 1 To remove power supply shield, locate and remove using a TORX T20 the three screws securing the power supply cover to the rear deck. Figure 36 WA R N I N G 100 Power supply cover screw removal Thin sheet metal parts may have sharp edges. Handle with care to avoid injury.
7000 service guide.book Page 101 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 2 Once screws have been removed, carefully remove the power supply cover by lifting the cover up and off retaining tabs on rear deck.
7000 service guide.book Page 102 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies To remove the power supply 1 Disconnect all cables from power supply board. 2 Locate and remove using a TORX T10 driver the four screws securing the power supply assembly to the rear deck.
7000 service guide.book Page 103 Thursday, October 16, 2008 12:18 PM Replacing Assemblies 5 To remove the AC input board 1 Disconnect all cables on AC input board. 2 Disconnect the ground wire from its chassis terminal. 3 Locate and remove using a TORX T20 driver the single screw securing the assembly to the rear deck. 4 Slide assembly to right and lift out of rear deck. 5 Take care that you do not damage the switch extender during removal.
7000 service guide.book Page 104 Thursday, October 16, 2008 12:18 PM 5 Replacing Assemblies 6 To remove the switch extender, gently pry open the extender using a flat head screwdriver.
7000 service guide.book Page 105 Thursday, October 16, 2008 12:18 PM Agilent InfiniiVision 7000 Series Oscilloscope Service Guide 6 Replaceable Parts This chapter describes how to order replaceable assemblies and parts for the Agilent 7000A Series Oscilloscopes. Diagrams and parts lists are included for assemblies and hardware that you can order. Before working on the oscilloscope, read the safety summary at the back of this book.
7000 service guide.book Page 106 Thursday, October 16, 2008 12:18 PM 6 Replaceable Parts Ordering Replaceable Parts Listed Parts To order a part in the parts list, quote the Agilent Technologies part number, indicate the quantity desired, and address the order to the nearest Agilent Technologies Sales Office. To find your nearest sales office go to www.agilent.com.
7000 service guide.book Page 107 Thursday, October 16, 2008 12:18 PM Replaceable Parts 6 In order for Agilent Technologies to provide these advantages, please send a check or money order with each order. Mail order forms and specific ordering information are available through your local Agilent Technologies Sales Office. Addresses and telephone numbers are located in a separate document shipped with the manuals.
7000 service guide.book Page 108 Thursday, October 16, 2008 12:18 PM 6 Replaceable Parts Exploded Views The following exploded views provide a graphical representation of the oscilloscope at the time this manual was released. Not all parts are shown. Your parts may be slightly different thank those shown. These views provide reference designator numbers that map to those used in the parts list table in this chapter.
7000 service guide.
7000 service guide.book Page 110 Thursday, October 16, 2008 12:18 PM 6 Replaceable Parts Replaceable Parts List The information given for each part consists of the following: • Reference designation. • Agilent Technologies part number. • Total quantity (QTY) in the instrument or on assembly. • Description of the part.
7000 service guide.book Page 111 Thursday, October 16, 2008 12:18 PM Replaceable Parts Agilent Part Ref Des Number Qty 6 Description H1 1400-0611 2 Clamp-FL-CA 1-WD PVC H2 54684-42202 1 Hole plug front panel (2 Channel only, not shown) H3 0515-0372 13 Screw-Machine w/Crest-Cup-Con-Wshr Pan-HD TORX-T10 M3X0.5 8mm-LG SST-300 Passivate H4 0515-0658 4 Screw-Machine w/Crest-Cup-Con-Wshr Pan-HD TORX-T6 M2X0.
7000 service guide.
7000 service guide.
7000 service guide.book Page 114 Thursday, October 16, 2008 12:18 PM 6 Replaceable Parts Agilent Part Ref Des Number Qty Description W1 54695-61601 1 LVDS Display Cable W2 54695-61602 1 Inverter Cable W3 54684-61601 1 Cable - Keyboard W4 54695-61604 1 Softkeyboard Cable W5 54695-61603 1 Cable - DC Not shown 54695-62301 1 Accessory Pouch W6 Power cord 0-1 Part number varies by country. Contact your local Agilent sales office for replacement.
7000 service guide.
7000 service guide.
7000 service guide.book Page 117 Thursday, October 16, 2008 12:18 PM 1 Safety Notices This apparatus has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for Measuring Apparatus, and has been supplied in a safe condition. This is a Safety Class I instrument (provided with terminal for protective earthing). Before applying power, verify that the correct safety precautions are taken (see the following warnings).
7000 service guide.book Page 118 Thursday, October 16, 2008 12:18 PM 1 Safety Symbols ! Instruction manual symbol: the product is marked with this symbol when it is necessary for you to refer to the instruction manual in order to protect against damage to the product. Hazardous voltage symbol. Earth terminal symbol: Used to indicate a circuit common connected to grounded chassis.
