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Troubleshooting

4

7000 Series Oscilloscopes Service Guide 

73

 

6

If you still do not see the waveform, use the 
troubleshooting flowchart in this chapter to isolate the 
problem.

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. The trimmer 
capacitor is located on the probe BNC connector.

Figure 11

Example pulses

3

Connect probes to all other analog channels (channel 2 of 
a 2- channel oscilloscope, or channels 2, 3, and 4 of a 
4- channel oscilloscope). Repeat the procedure for each 
channel. This matches each probe to each channel.

The process of compensating the probes serves as a basic 
test to verify that the oscilloscope is functional.

comp.cdr

Perfectly compensated

Over compensated

Under compensated

Содержание InfiniiVision 7000 Series

Страница 1: ...s1 Agilent InfiniiVision 7000 Series Oscilloscopes Service Guide ...

Страница 2: ...rdware and or software described in this document are furnished under a license and may be used or copied only in accor dance with the terms of such license Restricted Rights Legend If software is for use in the performance of a U S Government prime contract or subcon tract Software is delivered and licensed as Commercial computer software as defined in DFAR 252 227 7014 June 1995 or as a commerci...

Страница 3: ...tions 3 Calibrating and Adjusting This chapter explains how to adjust the oscilloscope for optimum operating performance 4 Troubleshooting 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 5 Replacing Assemblies This chapter describes how to remove ass...

Страница 4: ...rmation 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 Key2 then pressing Key3 are abbreviated as follows Press Key1 Key2 Key3 The keys may be front panel keys or sof...

Страница 5: ...15 Transient Withstand Capability 16 Environmental Conditions 17 Specifications 18 Contact us 19 2 Testing Performance 21 Overview 22 List of Test Equipment 23 Fluke MET CAL Procedures 25 Conventions 25 To construct the test connector for use with MSO models only 26 To test digital channels MSO models only 28 To verify digital channel threshold accuracy MSO models only 29 When to Test 29 ...

Страница 6: ...00 Series Oscilloscopes Performance Test Record 57 3 Calibrating and Adjusting 59 User Calibration 61 To perform User Cal 61 User Cal Status 64 4 Troubleshooting 65 Solving General Problems with the Oscilloscope 66 Troubleshooting the Oscilloscope 69 Equipment required for troubleshooting 70 To check out the oscilloscope 70 To verify basic oscilloscope operation 72 To compensate the analog probes ...

Страница 7: ... 88 To remove Acquisition and Inverter assemblies 90 To remove the Front Panel assembly 93 To remove the Fan assembly 99 To remove the power supply shield 100 To remove the power supply 102 To remove the AC input board 103 6 Replaceable Parts 105 Ordering Replaceable Parts 106 Listed Parts 106 Unlisted Parts 106 Direct Mail Order System 106 Exchange Assemblies 107 Exploded Views 108 Replaceable Pa...

Страница 8: ...8 Service Guide Contents ...

Страница 9: ...p Equipment for 4 Channel External Trigger Sensitivity Test 55 Figure 9 User Calibration cable for 2 channel oscilloscope 62 Figure 10 User Calibration cable for 4 channel oscilloscope 63 Figure 11 Example pulses 73 Figure 12 System Board Test Points Top Side 75 Figure 13 System Board Test Points Bottom Side 76 Figure 14 Location of the Fan Connector 80 Figure 15 Default setup screen 82 Figure 16 ...

Страница 10: ...nt panel assembly separated from front deck 96 Figure 32 Separating front panel from printed circuit board 97 Figure 33 Front panel disassembly 97 Figure 34 Removing display assembly 98 Figure 35 Removing fan assembly 99 Figure 36 Power supply cover screw removal 100 Figure 37 Lifting power supply cover off 101 Figure 38 Removing the power supply 102 Figure 39 Removing the AC input board 103 Figur...

Страница 11: ...age Measurement Accuracy 34 Table 7 Settings Used to Verify Voltage Measurement Accuracy 35 Table 8 Equipment Required to Verify Bandwidth 39 Table 9 Equipment Required to Verify Time Scale Accuracy 44 Table 10 Equipment Required to Verify Horizontal Dt Accuracy 46 Table 11 Equipment Required to Verify Trigger Sensitivity 48 Table 12 Equipment Required to Troubleshoot the Oscilloscope 70 Table 13 ...

Страница 12: ...12 Service Guide Tables ...

Страница 13: ...ental Conditions 17 Specifications 18 Contact us 19 This chapter contains a partial list of characteristics and specifications for the Agilent InfiniiVision 7000 Series oscilloscopes For a full list of Agilent InfiniiVision 7000 Series oscilloscopes characteristics and specifications see the data sheet The data sheet is available at www agilent com find 7000 ...

Страница 14: ...14 7000 Series Oscilloscopes Service Guide 1 Characteristics and Specifications Power Requirements Line voltage frequency and power Line 100 120 Vac 50 60 400 Hz 100 240 Vac 50 60 Hz 120 W max ...

Страница 15: ...ements performed on circuits directly connected to the low voltage installation Examples are measurements on household appliances portable tools and similar equipment Measurement category III is for measurements performed in the building installation Examples are measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in the fixe...

Страница 16: ...0 1 probe CAT I 500 Vpk 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 However the input could still be damaged depending on the time constant of the signal The 50 Ω input protection mode only functions when the oscilloscope is powered on CAUTION Maximum input voltage for logic channels 40 V pe...

Страница 17: ...ted equipment Pollution Degree The InfiniiVision 7000 Series Oscilloscope may be operated in environments of Pollution Degree 2 or Pollution Degree 1 Pollution Degree Definitions Pollution Degree 1 No pollution or only dry non conductive pollution occurs The pollution has no influence Example A clean room or climate controlled office environment Pollution Degree 2 Normally only dry non conductive ...

Страница 18: ...cations 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 A contact list is provided on the next page The most up to date list is available at www agilent com find contactus ...

Страница 19: ...a 1 800 888 848 Singapore 1 800 375 8100 Taiwan 0800 047 866 Thailand 1 800 226 008 Europe Austria 0820 87 44 11 Belgium 32 0 2 404 93 40 Denmark 45 70 13 15 15 Finland 358 0 10 855 2100 France 0825 010 700 Germany 01805 24 6333 0 14 minute Ireland 1890 924 204 Italy 39 02 92 60 8484 Netherlands 31 0 20 547 2111 Spain 34 91 631 3300 Sweden 0200 88 22 55 Switzerland French 44 21 8113811 Opt 2 Switz...

Страница 20: ...20 7000 Series Oscilloscopes Service Guide 1 Characteristics and Specifications ...

Страница 21: ...fy digital channel threshold accuracy MSO models only 29 To verify voltage measurement accuracy 33 To verify bandwidth 38 To verify time scale accuracy 44 To verify horizontal delta t accuracy 46 To verify trigger sensitivity 47 Agilent 7000 Series Oscilloscopes Performance Test Record 57 This chapter explains how to verify correct oscilloscope operation and perform tests to ensure that the oscill...

Страница 22: ...kes it easy for you to connect the oscilloscope probes to function generators and measurement equipment Let the Equipment Warm Up Before Testing For accurate test results let the test equipment and the oscilloscope warm up 30 minutes before testing Verifying Test Results During the tests record the readings in the Performance Test Record on page 57 To verify whether a test passes verify that the r...

Страница 23: ...820A Signal Generator 25 MHz 100 MHz 350 MHz 500 MHz and 1 GHz sine waves Agilent N5181A E4400B or 8648A Power Meter Sensor 1 GHz 3 accuracy Agilent E4418B 8482A BNC banana cable BNC m to dual banana Pomona 2BC BNC 36 or Agilent 11001 66001 BNC cable qty 3 BNC BNC 48 length Agilent 10503A Cable Type N m 609 6 mm 24 in Agilent 11500B Probe cable No substitute Agilent 01650 61607 or Agilent N6450 60...

Страница 24: ... 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 com at the time this manual was published Table 1 List of test equipment Equipment Critical Specifications Recommended Model Part Number ...

Страница 25: ...ance 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 Conventions The following conventions will be used when referring to oscilloscope models throughout this chapter Table 2 Conventions Models Referred to as MSO DSO7012A B MSO DSO7014A B 100 MHz Models MSO DSO7032A B MSO DSO703...

Страница 26: ...e side of the Berg strip solder a jumper wire to all of the pins shown in Figure 1 on page 27 3 On the other side of the Berg strip solder another jumper wire to all of the pins 4 Solder the center of the BNC connector to a center pin on one of the rows on the Berg strip 5 Solder the ground tab of the BNC connector to a center pin on the other row on the Berg strip Table 3 Materials required to co...

Страница 27: ...mance 2 7000 Series Oscilloscopes Service Guide 27 Figure 1 Constructing the 8 by 2 Connector Jumper 2 Signal Lead from scope s MSO cable 8 x 2 Berg Strip BNC Panel Mount Connector Ground Lead from scope s MSO cable ...

Страница 28: ... connect digital channels D0 D1 D2 and D3 to the Probe Comp signal on the center of the front panel 3 Press the AutoScale key If four square waves appear the acquisition system is functioning correctly If the square waves do not appear go to the Troubleshooting chapter Then return here to finish testing the digital channels 4 Disconnect the digital channels from the calibration point 5 Use steps 2...

Страница 29: ...When to Test You should perform this test every 12 months or after 2000 hours of operation whichever comes first What to Test Use these instructions to test the threshold settings of digital channels D7 D0 Then use the same instructions to test digital channels D15 D8 Verifying Test Results After each threshold test record the voltage reading in the Performance Test Record on page 57 To verify whe...

Страница 30: ...o connect digital channels D0 D7 to one side of the BNC Tee Then connect the D0 D7 ground lead to the ground side of the 8 by 2 connector See Figure 2 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 3 V Fluke 5...

Страница 31: ... 1 output of the calibrator as shown in Figure 2 6 On the oscilloscope press the D15 D0 key then press the Thresholds softkey then press the D7 D0 softkey repeatedly until the check mark is next to User 7 Press the User softkey to the right of the D7 D0 softkey then turn the Entry knob on the front panel of the Test Connector BNC Banana cable Channels 8 15 Channels 0 7 Oscilloscope Calibrator Digi...

Страница 32: ...loscope calibrator to decrease the offset voltage in increments of 10 mV until the activity indicators for digital channels D7 D0 are all at digital low levels Record the oscilloscope calibrator voltage in the Performance Test Record see page 57 d Use the knob on the oscilloscope calibrator to increase the offset voltage in increments of 10 mV until the activity indicators for digital channels D7 ...

Страница 33: ...8 to verify threshold accuracy and record the threshold levels in the Performance Test Record see page 57 Be sure to set the thresholds with the User softkey for the appropriate set of channels To verify voltage measurement accuracy This test verifies the accuracy of the analog channel voltage measurement for each channel In this test you will measure the dc voltage output of an oscilloscope calib...

Страница 34: ...uired 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 01 accuracy Agilent 34401A Cable BNC Qty 2 Agilent 10503A Shorting cap BNC Agilent 1250 0774 Adapter BNC f to banana m Agilent 1251 2277 Adapter BNC tee m f f Agilent 1250 0781 or Pomona 3285 Bloc...

Страница 35: ...oscilloscope and the multimeter see Figure 3 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 7 V 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...

Страница 36: ...ttle 5 Press the Y2 softkey then position the Y2 cursor to the center of the voltage trace using the Entry knob The ΔY value on the lower line of the display should be within the test limits of Table 7 If a result is not within the test limits go to the Troubleshooting chapter Then return here 6 Continue to check the voltage measurement accuracy with the remaining Volts div setting values in Table...

Страница 37: ...ise 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 To eliminate the noise add a BNC Tee blocking capacitor and shorting cap at the oscilloscope channel input to shunt the noise to ground See Figure 4 If a BNC capacitor is not available use an SMA blocking capacitor adapter and cap See Blocking capacitor and shorting cap in ...

Страница 38: ...e a signal generator and a power meter 1 GHz Models Test limits at 2 mV div to 5 V div All channels 3 dB dc to 1 GHz 500 MHz Models Test limits at 2 mV div to 5 V div All channels 3 dB dc to 500 MHz 350 MHz Models Test limits at 2 mV div to 5 V div All channels 3 dB dc to 350 MHz 100 MHz Models Test limits at 2 mV div to 5 V div All channels 3 dB dc to 100 MHz ...

Страница 39: ...apter to connect the other splitter output to the channel 1 input Table 8 Equipment Required to Verify Bandwidth Equipment Critical Specifications Recommended Model Part 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 15 dB Agilent 11667A Cable Type N m 24 inch Agilent 11500...

Страница 40: ...Performance 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 Oscilloscope Signal Generator Power Meter Power Splitter Power Sensor N to BNC adapter N Cable ...

Страница 41: ...x divisions of amplitude The signal on the oscilloscope screen should be about five cycles at six divisions amplitude 5 Set up the Amplitude measurement a Press the Quick Meas key b Press the Clear Meas softkey c Press the Select softkey and use the Entry knob to select Std Deviation within the select menu d Press the Measure Std Dev softkey 6 Note the oscilloscope Std Dev 1 reading at the bottom ...

Страница 42: ...on the calibration chart on the power sensor 11 Set the oscilloscope sweep speed according to the following 1 GHz Models 500 ps div 500 MHz Models 1 ns div 350 MHz Models 2 ns div 100 MHz Models 5 ns div 12 Note the oscilloscope Std Dev 1 reading at the bottom of the screen 13 Note the reading on the power meter and covert to Vrms using the expression 14 Calculate the response using the expression...

Страница 43: ...esult 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 response dB 20 log10 mV 211 2 mV 210 4 mV 185 3 mV 161 6 1 16 dB ...

Страница 44: ... b Set the oscilloscope Channel 1 vertical sensitivity to 200 mv div c Set the oscilloscope horizontal sweep speed control to 5 ns div d Adjust the intensity to get a sharp clear trace e Adjust the oscilloscope s trigger level so that the rising edge of the waveform at the center of the screen is located where the center horizontal and vertical grid lines cross center screen f Ensure the horizonta...

Страница 45: ...here the rising edge crosses the center horizontal grid line to the center vertical grid line The number of nanoseconds is equivalent to the time scale error in ppm e Use the date code on the oscilloscope s serial tag to calculate the number of years since manufacture Include any fractional portion of a year f Use the following formula to calculate the test limits TSA Limit 15 2 YrsSinceMfr ppm g ...

Страница 46: ...rker on the oscilloscope calibrator 2 Set the calibrator for 100 μs markers period 100 μs 3 Set up the oscilloscope a Set channel 1 Coupling to DC b Set channel 1 Imped to 50 Ohm c Press the Display key then set the Vectors softkey to off d Press the AutoScale key e Set the time base to 20 μs div f Press the Menu Zoom key then set the Time Ref softkey to Left g Adjust the Trigger Level knob to obt...

Страница 47: ...the following If the measurements are not within the test limits go to the Troubleshooting chapter Then return here Period 100 ns The test limits are 99 8 ns to 100 2 ns 7 Change the time base to 2 ns div and the calibrator to 5 ns markers 8 Measure the following If the measurement is not within the test limits go to the Troubleshooting chapter Then return here Period 5 ns The test limits are 4 96...

Страница 48: ... to 100 MHz 250 mVpp 100 MHz to max bandwidth 500 mVpp External trigger on 4 channel models MSO DSO7xx4A B DC to 500 MHz 500 mVpp Table 11 Equipment Required to Verify Trigger Sensitivity Equipment Critical Specifications Recommended Model Part Signal Generator 25 MHz 100 MHz 350 MHz 500 MHz and 1 GHz sine waves Agilent N5181A E4400B or 8648A Powersplitter Outputs differ 0 15 dB Agilent 11667A Cab...

Страница 49: ...nternal Trigger Sensitivity all models 1 Connect the equipment see Figure 6 a Connect the signal generator output to the oscilloscope channel 1 input Figure 6 Setting Up Equipment for Internal Trigger Sensitivity Test Signal Generator N to BNC adapter N Cable Oscilloscope ...

Страница 50: ...t 10 mVpp d Press the AutoScale key e Set the time base to 10 ns div f Set channel 1 to 5 mV div g Decrease the amplitude from the signal generator until 1 vertical division of the signal is displayed The trigger is stable when the displayed waveform is stable If the trigger is not stable try adjusting the trigger level If adjusting the trigger level makes the trigger stable the test still passes ...

Страница 51: ... channel models Verify the external trigger sensitivity at these settings Trigger range 1 V 500 MHz MSO DSO7052A B 200 mVpp 350 MHz MSO DSO7032A B 200 mVpp 100 MHz MSO DSO7012A B 200 mVpp Trigger range 8 V 500 MHz MSO DSO7052A B 500 mVpp 350 MHz MSO DSO7032A B 500 mVpp 100 MHz MSO DSO7012A B 500 mVpp ...

Страница 52: ...o 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 Figure 7 Setting Up Equipment for 2 Channel External Trigger Sensitiv ity Test Oscilloscope Signal Generator Power Meter Power Splitter Power Sensor N to BNC adapter N Cable 50 Ω Feedthrough ...

Страница 53: ... chart on the power sensor If necessary do a linear interpolation if the correct factor is not included in the power meter s calibration chart c Adjust the signal generator output for a reading on the power meter of 100 μW 200 mVpp 70 71mV rms Power Vin2 50Ω 70 71 mV2 50Ω 100 μW d Press the Trigger Edge key then press the Source softkey to set the trigger source to external trigger e Check for sta...

Страница 54: ...6 78mV rms Power Vin2 50Ω 176 78 mV2 50Ω 625 μW c Check for stable triggering and adjust the trigger level if necessary Triggering is indicated by the Trig d indicator at the top of the display When it is flashing the oscilloscope is not triggered When it is not flashing the oscilloscope is triggered d Record the results as Pass or Fail in the Performance Test Record see page 57 Test External Trig...

Страница 55: ...ter 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 Figure 8 Setting Up Equipment for 4 Channel External Trigger Sensitiv ity Test Oscilloscope Signal Generator Power Meter Power Splitter Power Sensor N to BNC adapter N Cable 50 Ω Feedthrough ...

Страница 56: ...art 5 Adjust the signal generator output for reading on the power meter of 625 μW 500mVpp 176 78mV rms Power Vin2 50Ω 176 78 mV2 50Ω 625 μW 6 Press the Trigger Edge key then press the Source softkey to set the trigger source to External 7 Check for stable triggering and adjust the trigger level if necessary Triggering is indicated by the Trig d indicator at the top of the display When it is flashi...

Страница 57: ...____ 1 V Div 7 V 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 6 mV ________ ________ ________ ________ 20 mV Div 140 mV 136 16 mV to 143...

Страница 58: ...ision at 100 MHz ________ ________ ________ _______ Trigger Sensitivity Test Limits Channel 1 Channel 2 Channel 3 Channel 4 External trigger 7052 7032 7012 1 V range 100 mV at 25 MHz ________ ________ ________ ________ 7052 200 mV at 500 MHz ________ ________ ________ ________ 7032 200 mV at 350 MHz ________ ________ ________ ________ 7012 200 mV at 100 MHz ________ ________ ________ ________ Exte...

Страница 59: ...ting Before you start the adjustments let the oscilloscope and test equipment warm up for at least 30 minutes Read All Cautions and Warnings Read the following cautions and warning before making adjustments or performing self calibration WARNING HAZARDOUS VOLTAGES Read the safety notice at the front of this book before proceeding Maintenance is performed with power supplied to the oscilloscope and...

Страница 60: ...s removed which leads to higher than normal operating temperatures Have the fan blow air across the system board where the heat sinks are located If the cover is removed but the main shield remains installed and the bottom holes are not blocked the instrument will cool properly CAUTION AVOID DAMAGE TO ELECTRONIC COMPONENTS Electrostatic discharge ESD can damage electronic components When you use a...

Страница 61: ... generated signals to optimize circuits that affect channel sensitivity offset and trigger parameters Disconnect all inputs and allow the oscilloscope to warm up before performing this procedure Performing User Cal will invalidate your Certificate of Calibration If NIST National Institute of Standards and Technology traceability is required perform the procedures in Chapter 2 in this book using tr...

Страница 62: ...cilloscope 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 Figure 9 User Calibration cable for 2 channel oscilloscope b For a 4 channel oscilloscope connect BNC tees to the equal length cables as shown below Then connect a Longer cable To Channel 1 To Channel 2 to TRIG OUT ...

Страница 63: ... 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 5 Begin the Self Cal by pressing the Start User Cal softkey 6 When the User Cal is completed set the rear panel CALIBRATION switch to PROTECTED Longer cable to TRIG OUT To Channel 3 To Channel 2 To Channel 1 To Channel 4 ...

Страница 64: ...y 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 Results User Cal date Change in temperature since last User Cal Failure Comments Probe Cal Status ...

Страница 65: ... unexpected If you cannot see a channel If you cannot get any response from the oscilloscope Procedures for troubleshooting the oscilloscope follow the problem solving suggestions The troubleshooting section shows you how to Check out the oscilloscope Check power supply Check the system board Check the display Check the fan Run internal self tests Verify default setup Read All Cautions and Warning...

Страница 66: ...cope power receptacle Check that the power source is live Check that the front panel power switch is on If there is still no display go to the troubleshooting procedures in this chapter If there is no trace display Check that the INTENSITY knob on the front panel is adjusted correctly Recall the default setup by pressing Save Recall then Default Setup This will ensure that the trigger mode is Auto...

Страница 67: ...t For high speed measurements each probe s individual ground lead should also be connected to a ground point closest to the signal point in the circuit under test Check that the trigger setup is correct A correct trigger setup is the most important factor in helping you capture the data you desire See the User s Guide for information about triggering Check that infinite persistence in the Display ...

Страница 68: ... 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 b On models with the MSO option press the digital channels D15 D0 key until it is illuminated Press the AutoScale key to automatic...

Страница 69: ...illoscope Read the safety notice at the back of this book before proceeding WARNING HAZARDOUS VOLTAGES EXIST HIGH VOLTAGE IS PRESENT ON POWER SUPPLY HEAT SINKS The power supply heat sinks of the 7000 Series oscilloscopes are at a high potential This presents an electric shock hazard Protect yourself from electric shock by keeping this area covered or by not coming in contact with the heat sinks wh...

Страница 70: ...TS When you remove the oscilloscope cover and main shield use an external fan to provide continuous air flow over the heat sinks Air flow over the heat sinks is reduced when the cover and main shield are removed which leads to higher than normal operating temperatures Have the fan blow air across the system board where the heat sinks are located Otherwise damage to the components can occur If the ...

Страница 71: ...l briefly light up in groups from bottom to top Next the Agilent logo appear on the display Next a message will appear with tips on getting started using the oscilloscope At this time you can press any key to remove the message and view the display Or you can wait and the message will automatically disappear It will take a total of about 10 15 seconds for the oscilloscope to go through its basic s...

Страница 72: ...nel 3 Connect the probe s ground lead to the ground terminal that is next to the Probe Comp terminal 4 Press AutoScale 5 You should see a waveform on the oscilloscope s display similar to this If you see the waveform but the square wave is not shaped correctly as shown above perform the procedure To compensate the analog probes on page 73 If you do not see the waveform ensure your power source is ...

Страница 73: ...c oscilloscope operation on page 72 2 Use a nonmetallic tool to adjust the trimmer capacitor on the probe for the flattest pulse possible The trimmer capacitor is located on the probe BNC connector Figure 11 Example pulses 3 Connect probes to all other analog channels channel 2 of a 2 channel oscilloscope or channels 2 3 and 4 of a 4 channel oscilloscope Repeat the procedure for each channel This ...

Страница 74: ...ooting Troubleshooting Flowchart The following flowchart describes how to troubleshoot the oscilloscope Start Test Power Supply Okay Test System Board Okay Test Display Okay End Replace Power Supply Replace System Board Replace Display Yes Yes Yes No No No ...

Страница 75: ...es Oscilloscopes Service Guide 75 System board drawings Refer to these two drawings to locate test points on the system board Figure 12 System Board Test Points Top Side 6 5PQTJEF PNQPOFOU 1MBDF 6 Fan connector Pin 1 Pin 9 Pin 1 ...

Страница 76: ...76 7000 Series Oscilloscopes Service Guide 4 Troubleshooting Figure 13 System Board Test Points Bottom Side 6 6 U3202 U3300 ...

Страница 77: ...ly 6 If it is less than 14 V the problem is in the cable or the power supply Remove the cable and test it for shorts or opens using the DMM Replace the defective assembly 7 If the voltage is 15 V 10 only when the cable is disconnected from the system board then test the system board CAUTION USE AN EXTERNAL FAN TO AVOID OVERHEATING COMPONENTS When you remove the oscilloscope cover and main shield u...

Страница 78: ...e voltage at test point L3301 and or L3302 is not within the specified range replace the system board 5 If the voltage at test point L3204 and or L3201 is not correct Disconnect J2730 from the system board and measure pins 1 and 2 on the system board connector This is the voltage to the display and it should be 3 3V If it is not replace the system board If the voltage is correct replace the displa...

Страница 79: ...ct the power cord 5 Use the DMM to check the Inverter Power voltage see table below Refer to Figure 12 on page 75 and Figure 13 on page 76 to locate the test points 6 If the voltage is incorrect replace the system board 7 If the voltage is correct use an oscilloscope to check the LCD clock see table below Table 14 Display Signals on the System Board 8 If the clock signal is good replace the LCD 9 ...

Страница 80: ...ive Follow these steps a Disconnect the fan cable from the system board b Measure the fan voltage at the connector on the system board See the figure below for the location of the fan connector c If the fan voltage is approximately 8 5 Vdc at room temperature replace the fan If the fan voltage is not approximately 8 5 Vdc replace the system board The proper voltage range depending on temperature i...

Страница 81: ... confidence level that the oscilloscope is operating properly 1 Press the Utility key then press the Service softkey 2 Begin the internal self tests by pressing the Start Self Test softkey To verify default setup The oscilloscope is designed to turn on with the setup from the last turn on or previous setup However if the Secure Environment option is installed the oscilloscope will always execute a...

Страница 82: ...t connected to the channel 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 ...

Страница 83: ...tive and may look different from what you have in your oscilloscope The removable assemblies include Handle page 85 Adjustable Legs page 86 Cabinet page 87 Rear Deck page 88 Acquisition and Inverter Assemblies page 90 Front Panel Assembly page 93 Fan Assembly page 99 Power Supply Shield page 100 Power Switch page 102 Power Supply page 102 AC Input Board page 103 Tools Used for Disassembly Use thes...

Страница 84: ... possible perform the procedures with the power cord removed from the oscilloscope WARNING AVOID ELECTRICAL SHOCK Hazardous voltages exist on the LCD assembly and power supply To avoid electrical shock 1 Disconnect the power cord from the oscilloscope 2 Wait at least three minutes for the capacitors in the oscilloscope to discharge before you begin disassembly Read the Safety Summary at the back o...

Страница 85: ...e 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 Figure 16 Removing the handle ...

Страница 86: ...o 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 Figure 17 Removing adjustable leg ...

Страница 87: ...ng 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 Figure 18 Removing cabinet ...

Страница 88: ...uisition 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 WARNING Sheet metal parts may have sharp edges Handle with care to avoid injury ...

Страница 89: ...g Assemblies 5 7000 Series Oscilloscopes Service Guide 89 4 Disconnect power harness and fan cable from acquisition board Note cable locations for re assembly Figure 20 Separating front and rear deck assemblies ...

Страница 90: ...ersion Figure 21 Removing the T6 screws 2 Disconnect Inverter keyboard and display cables Note locations for re connection It should be noted that cables can be removed from cable clamps at this time as well The cable restraining pads that affix the display cable to the front deck are adhesive and great care should be taken when removing them so as not to damage the cable NOTE If the battery on th...

Страница 91: ...ide 91 3 Using a TORX T10 driver locate and remove 7 mounting screws Figure 22 TORX T10 mounting screw locations Note when removing or replacing Acquisition board care should be taken so as not to damage grounding spring on front deck Adhesive cable restraints ...

Страница 92: ... 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 Figure 24 Removal of inverter board ...

Страница 93: ...t deck Carefully squeeze the shield so that it clears the sheet metal tabs holding it place then slide it free of the front deck Figure 25 Removing cable shield 2 Remove keyboard cables that extend thru front deck Figure 26 Removing keyboard cables WARNING Thin sheet metal parts may have sharp edges Handle with care to avoid injury ...

Страница 94: ...he 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 Working your way around the bezel releasing the clips gently lift the bezel away from the front deck Figure 28 Removing the bezel ...

Страница 95: ... the Softkey board printed circuit board from the bezel insure cable has been disconnected and slide board off alignment post Figure 29 Removal of softkey board 6 To remove the front panel assembly carefully release front panel clips that secure front panel assembly to the front ...

Страница 96: ...loscopes Service Guide 5 Replacing Assemblies deck by pulling them clear of the sheet metal tabs or openings Figure 30 Removing front panel assembly from front deck Figure 31 Front panel assembly separated from front deck ...

Страница 97: ...he 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 Figure 33 Front panel disassembly ...

Страница 98: ...ecure 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 Figure 34 Removing display assembly ...

Страница 99: ...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 Figure 35 Removing fan assembly ...

Страница 100: ... 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 Power supply cover screw removal WARNING Thin sheet metal parts may have sharp edges Handle with care to avoid injury ...

Страница 101: ...s 5 7000 Series Oscilloscopes Service Guide 101 2 Once screws have been removed carefully remove the power supply cover by lifting the cover up and off retaining tabs on rear deck Figure 37 Lifting power supply cover off ...

Страница 102: ...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 Figure 38 Removing the power supply ...

Страница 103: ... 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 Figure 39 Removing the AC input board Ground Wire ...

Страница 104: ...s Service Guide 5 Replacing Assemblies 6 To remove the switch extender gently pry open the extender using a flat head screwdriver Figure 40 Removing power switch extender CAUTION Twisting the latch too much could cause it to break ...

Страница 105: ...arts This chapter describes how to order replaceable assemblies and parts for the Agilent 7000 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 ...

Страница 106: ... a description of the part including its function and the number of parts required Address the order to the nearest Agilent Technologies Sales Office Direct Mail Order System Within the USA Agilent Technologies can supply parts through a direct mail order system There are several advantages to this system Direct ordering and shipping from the Agilent Technologies parts center in California USA No ...

Страница 107: ...s the customer to exchange a faulty assembly with one that has been repaired calibrated and performance verified by the factory The cost is significantly less than that of a new part The exchange parts have a part number in the form XXXXX 695XX After receiving the repaired exchange part from Agilent Technologies a United States customer has 30 days to return the faulty assembly For orders not orig...

Страница 108: ...ovide 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 Figure 41 Exploded View 1 of 2 ...

Страница 109: ...Replaceable Parts 6 7000 Series Oscilloscopes Service Guide 109 Figure 42 Exploded View 2 of 2 ...

Страница 110: ... 350 MHz system board A2 54691 66510 1 4 ch 350 MHz system board A2 54692 66510 1 2 ch 500 MHz system board A2 54693 66510 1 4 ch 500 MHz system board A2 54695 66510 1 4 ch 1 GHz system board A3 54695 66418 1 2 ch keyboard PC board assembly two pieces includes main keyboard and softkey keyboard 7000A Series A3 54695 66419 1 4 ch keyboard PC board assembly two pieces includes main keyboard and soft...

Страница 111: ...RX T6 M2X0 4 6mm LG SST 300 Passivate H5 2950 0054 14 Nut 1 2 28 THD secures rear BNCs not shown H6 0515 2143 3 Screw Machine w Patch LK Pan HD TORX T20 M4X0 7 6mm LG SST 300 Passivate H7 5022 6627 4 Screw Machine w Split Lock Flat Wshr Pan HD TORX T10 M3X0 5 8mm LG SST 300 passivate H8 54695 26301 2 Screw Shoulder H9 3050 2320 2 Washer Flat Non metalic 10 5mm ID 20mm OD 2mm tHK Polyamide H10 0515...

Страница 112: ...Hz MSO7034A MP1 54691 94303 1 ID Label 4 Ch DSO 350 MHz DSO7034B MP1 54691 94304 1 ID Label 4Ch MSO 350 MHz MSO7034B MP1 54692 94301 1 ID Label 2 Ch DSO 500 MHz DSO7052A MP1 54692 94302 1 ID Label 2 Ch MSO 500 MHz MSO7052A MP1 54692 94303 1 ID Label 2 Ch DSO 500 MHz DSO7052B MP1 54692 94304 1 ID Label 2 Ch MSO 500 MHz MSO7052B MP1 54693 94301 1 ID Label 4 Ch DSO 500 MHz DSO7054A MP1 54693 94302 1 ...

Страница 113: ... 2 CH Control Panel Label 7000B Series MP6 54695 94320 1 4 CH Control Panel Label 7000B Series MP7 54695 42201 1 Bezel 7000A Series MP7 54695 42202 1 Bezel 7000B Series MP8 54695 41902 1 Keypad rubber Main 4 Channel also used for 2 channel 7000A Series MP8 54695 41904 1 Keypad rubber Main 4 Channel also used for 2 channel 7000B Series MP9 54695 41903 1 Keypad rubber Soft MP10 54913 44101 1 Cover F...

Страница 114: ...itch MP29 54695 00103 1 Power Supply Cover MP30 54695 44401 1 Bucket MP31 54695 94309 1 2 CH Rear Label MP32 54913 40201 1 Panel Control MP33 54695 94311 2CH Control Panel Label Overlay Simplified Chinese 7000A Series MP33 54695 94312 4CH Control Panel Label Overlay Simplified Chinese 7000A Series MP33 54695 94313 2CH Control Panel Label Overlay Traditional Chinese 7000A Series MP33 54695 94314 4C...

Страница 115: ...P33 54695 943xx 2CH Control Panel Label Overlay Japanese 7000B Series MP33 54695 943xx 4CH Control Panel Label Overlay Japanese 7000B Series 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 7000A Series W4 54709 61604 1 Softkeyboard Cable 7000B Series W5 54695 61603 1 Cable DC Not shown 54695 62301 1 Accessory P...

Страница 116: ...116 7000 Series Oscilloscopes Service Guide 6 Replaceable Parts Optional item 10073C Passive Probe 10 1 500 MHz N2863A Passive Probe 10 1 300 MHz Ref Des Agilent Part Number Qty Description ...

Страница 117: ...change assemblies 107 exploded view front panel 108 instrument 109 F Fluke MET CAL procedures 25 front panel exploded view 108 removal 88 H handle removing 86 horizontal accuracy verification 46 I internal self tests 81 K keyboard removal 90 L LED startup sequence 70 lid removal 87 M making test connector 26 measurement accuracy voltage 33 measurement category 15 definitions 15 N NIST 61 O orderin...

Страница 118: ...us user cal 61 storage lid removal 87 T test connector constructing 26 digital channels 28 equipment 23 points power 75 76 record 57 threshold accuracy digital channel 29 test diagram 31 trace display problem solving 66 67 transient withstand capability 16 trigger sensitivity 47 sensitivity external 51 54 sensitivity internal 49 troubleshooting 65 display 79 equipment required 70 fan 80 flowchart ...

Страница 119: ... or fire hazard If you energize this instrument by an auto transformer for voltage reduction or mains isola tion the common terminal must be connected to the earth terminal of the power source Whenever it is likely that the ground protection is impaired you must make the instrument inoperative and secure it against any unintended operation Service instructions are for trained service personnel To ...

Страница 120: ...anual 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 ...

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