Keysight Technologies InfiniiVision 2000 Service Manual Download Page 63

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Keysight InfiniiVision 2000/3000 X-Series Oscilloscope

Service Guide

4 Troubleshooting

Solving General Problems with the Oscilloscope / 64
Verifying Basic Operation / 66

This chapter begins with

“Solving General Problems with the Oscilloscope

. It tells

you what to do in these cases:
•

If there is no display

•

If there is no trace display

•

If the trace display is unusual or unexpected

•

If you cannot see a channel

Next, this chapter describes procedures for

“Verifying Basic Operation

of the

oscilloscope:
•

To power-on the oscilloscope

•

To perform hardware self test

•

To perform front panel self test

•

To verify default setup

•

To perform an Auto Scale on the Probe Comp signal

•

To compensate passive probes

The service policy for all 2000/3000 X-Series oscilloscopes is now unit

replacement, so there are no longer internal assembly troubleshooting

instructions in this service guide.

Read All Cautions and Warnings

Before you begin any troubleshooting, read all Warning and Cautions in the “Troubleshooting” section.

Summary of Contents for InfiniiVision 2000

Page 1: ...Keysight InfiniiVision 2000 3000 X Series Oscilloscopes Service Guide...

Page 2: ...py of which can be found at www keysight com find sweula The license set forth in the EULA represents the exclusive authority by which the U S government may use modify distribute or disclose the Soft...

Page 3: ...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...

Page 4: ...ation 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...

Page 5: ...Category 14 Measurement Category Definitions 14 Maximum Input Voltage 15 Environmental Conditions 16 Specifications 16 Contact us 16 2 Testing Performance Overview 18 List of Test Equipment 19 Conven...

Page 6: ...Series Oscilloscopes Performance Test Record 53 Keysight 3000 X Series Oscilloscopes Performance Test Record 55 3 Calibrating and Adjusting User Calibration 58 To perform User Cal 58 User Cal Status...

Page 7: ...o compensate passive probes 69 5 Replacing Assemblies 6 Replaceable Parts Ordering Replaceable Parts 74 Listed Parts 74 Unlisted Parts 74 Direct Mail Order System 74 Exchange Assemblies 75 Exploded Vi...

Page 8: ...8 2000 3000 X Series Oscilloscopes Service Guide Contents...

Page 9: ...ent for Dual Cursor Accuracy Test 38 Figure 6 Using a Blocking Capacitor to Reduce Noise 39 Figure 7 Setting Up Equipment for Bandwidth 3 dB Verification Test 41 Figure 8 Setting Up Equipment for Inte...

Page 10: ...10 2000 3000 X Series Oscilloscopes Service Guide Figures...

Page 11: ...8 Settings Used to Verify DC Vertical Gain Accuracy 2000 X Series Models 30 Table 9 Settings Used to Verify DC Vertical Gain Accuracy 3000 X Series Models 31 Table 10 Equipment Required to Verify Dua...

Page 12: ...12 2000 3000 X Series Oscilloscopes Service Guide Tables...

Page 13: ...of characteristics and specifications for the Keysight InfiniiVision 2000 3000 X Series oscilloscopes For a full list of Keysight InfiniiVision 2000 3000 X Series oscilloscopes characteristics and sp...

Page 14: ...ents 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 mea...

Page 15: ...eries oscilloscopes only Input protection is enabled in 50 mode and the 50 load will disconnect if greater than 5 Vrms is detected However the input could still be damaged depending on the time consta...

Page 16: ...non operating to 4 000 m 13 123 ft Overvoltage Category This product is intended to be powered by MAINS that comply to Overvoltage Category II which is typical of cord and plug connected equipment Pol...

Page 17: ...accuracy MSO models only 24 To verify DC vertical gain accuracy 28 To verify dual cursor accuracy 35 To verify bandwidth 3 dB 40 To verify time base accuracy 45 To verify trigger sensitivity 47 Keysig...

Page 18: ...makes 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...

Page 19: ...MHz 500 MHz and 1 GHz sine waves Keysight N5171B Power Meter 1 GHz 3 accuracy Keysight N1914A Power Sensor 1 GHz 3 accuracy Keysight E9304A or N8482A 50 BNC Cable qty 3 BNC BNC 48 length Keysight 8120...

Page 20: ...nded Model Part Number Required only for testing digital channels of oscilloscopes that have the MSO option Most parts and equipment are available at www keysight com See respective manufacturer s web...

Page 21: ...On one side of the Berg strip solder a jumper wire to all of the pins shown in Figure 1 on page 22 3 On the other side of the Berg strip solder another jumper wire to all of the pins 4 Solder the cen...

Page 22: ...ies Oscilloscopes Service Guide 2 Testing Performance 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...

Page 23: ...els 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...

Page 24: ...en 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...

Page 25: ...BNC cable assembly to 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 t...

Page 26: ...de of the BNC Tee 5 Connect the BNC Tee to the Channel 1 output of the precision source as shown in Figure 2 6 On the oscilloscope press the Digital key then press the Thresholds softkey then press th...

Page 27: ...ource 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 precision source voltage in the Performanc...

Page 28: ...h the User softkey for the appropriate set of channels To verify DC vertical gain accuracy This test verifies the accuracy of the analog channel DC vertical gain for each channel In this test you will...

Page 29: ...st the channel s vertical position knob to place the baseline reference level at 0 5 major division from the bottom of the display Table 7 Equipment Required to Verify DC Vertical Gain Accuracy Equipm...

Page 30: ...V 1 352 V to 1 448 V 100 mV Div 700 mV 676 mV to 724 mV 50 mV Div 350 mV 338 mV to 362 mV 20 mV Div 140 mV 135 2 mV to 144 8 mV 10 mV Div 70 mV 67 6 mV to 72 4 mV 5 mV Div1 35 mV 33 4 mV to 36 6 mV 2...

Page 31: ...3000 X Series Models Volts Div Setting Precision Source Setting Test Limits 5 V Div 35 V 34 2 V to 35 8 V 2 V Div 14 V 13 68 V to 14 32 V 1 V Div 7 V 6 84 V to 7 16 V 500 mV Div 3 5 V 3 42 V to 3 58 V...

Page 32: ...to both the oscilloscope and the multimeter see Figure 3 Note Set the Low Force terminal of the Precision Source to its Floating state to prevent offset error caused by ground loop current from the P...

Page 33: ...2 11 Calculate the difference V2 V1 The difference in average voltage readings should be within the test limits of Table 8 or Table 9 depending on the oscilloscope model If a result is not within the...

Page 34: ...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 blockin...

Page 35: ...testing for example 1 Probe Probe then turn the Entry knob to select 1 00 1 3 Set up the oscilloscope a Set the Volts Div setting to the value in the first line in Table 11 or Table 12 depending on th...

Page 36: ...44 V to 1 456 V 100 mV Div 700 mV 672 mV to 728 mV 50 mV Div 350 mV 336 mV to 364 mV 20 mV Div 140 mV 134 4 mV to 145 6 mV 10 mV Div 70 mV 67 2 mV to 72 8 mV 5 mV Div1 35 mV 33 2 mV to 36 8 mV 2 mV Di...

Page 37: ...able 12 Settings Used to Verify Dual Cursor Accuracy 3000 X Series Models Volts Div Setting Precision Source Setting Test Limits 5 V Div 35 V 34 0 V to 36 0 V 2 V Div 14 V 13 6 V to 14 4 V 1 V Div 7 V...

Page 38: ...ent from the Precision Source ground to the DUT ground Figure 5 Setting up Equipment for Dual Cursor Accuracy Test 6 Adjust the output so that the multimeter reading displays the first Volts div preci...

Page 39: ...e dual cursor accuracy with the remaining Volts div setting values in Table 11 or Table 12 depending on the oscilloscope model 12 Finally repeat this procedure for the remaining channels to be tested...

Page 40: ...00 MHz Models All channels 3 dB dc to 100 MHz 70 MHz Models All channels 3 dB dc to 70 MHz Table 14 Equipment Required to Verify Bandwidth 3 dB Equipment Critical Specifications Recommended Model Part...

Page 41: ...tor to the input of the power splitter input b Connect the power sensor to one output of the power splitter c Use an N to BNC adapter to connect the other splitter output to the channel 1 input Figure...

Page 42: ...scilloscope screen should be about five cycles at six divisions amplitude 5 Set up the Amplitude measurement a Press the Meas key b Press the Clear Meas softkey and then the Clear All softkey c Press...

Page 43: ...ration chart on the power sensor 12 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 200 MHz Models 2 ns div 100 MHz...

Page 44: ...ord the result in the Performance Test Record see page 53 17 Move the power splitter from the channel 1 to the channel 2 input 18 Turn off the current channel and turn on the next channel using the ch...

Page 45: ...ess AutoScale 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...

Page 46: ...rising edge crosses the center horizontal grid line to the center vertical grid line The number of nanoseconds is equivalent to the time base error in ppm e Use the date code on the oscilloscope s se...

Page 47: ...ater of 1 div or 5 mVpp 10 mV div 0 6 div External trigger sensitivity on all models DC to 100 MHz 200 mVpp 100 MHz 200 MHz 350 mVpp Table 16 Equipment Required to Verify Trigger Sensitivity Equipment...

Page 48: ...nput Figure 8 Setting Up Equipment for Internal Trigger Sensitivity Test b With 2000 X Series oscilloscopes connect a 50 ohm feedthrough termination between the channel 1 input and the BNC cable With...

Page 49: ...ing chapter Then return here f Record the result as Pass or Fail in the Performance Test Record see page 53 g Repeat this step for the remaining oscilloscope channels 6 Perform these steps to test at...

Page 50: ...trigger sensitivity at these settings 100 MHz 200 mVpp 200 MHz 350 mVpp 1 Connect the equipment see Figure 9 a Use the N cable to connect the signal generator to the power splitter input b Connect one...

Page 51: ...X Series Oscilloscopes Service Guide 51 Figure 9 Setting Up Equipment for 4 Channel External Trigger Sensitivity Test Power Splitter Power Sensor Signal Generator Oscilloscope Power Meter N Cable N to...

Page 52: ...nal generator output for reading on the power meter of 6 Press the Trigger key then press the Source softkey to set the trigger source to External 7 Check for stable triggering and adjust the trigger...

Page 53: ...hannel 1 Channel 2 Channel 3 Channel 4 5 V Div 35 V 33 8 V to 36 2 V ________ ________ ________ ________ 2 V Div 14 V 13 52 V to 14 48 V ________ ________ ________ ________ 1 V Div 7 V 6 76 V to 7 24...

Page 54: ...________ ________ ________ ________ 2 mV Div 14 mV 12 56 mV to 15 44 mV ________ ________ ________ ________ 1 mV Div 7 mV 5 56 mV to 8 44 mV ________ ________ ________ ________ Bandwidth 3 dB Model Te...

Page 55: ...wer Supply Setting Test Limits Channel 1 Channel 2 Channel 3 Channel 4 5 V Div 35 V 34 2 V to 35 8 V ________ ________ ________ ________ 2 V Div 14 V 13 68 V to 14 32 V ________ ________ ________ ____...

Page 56: ..._____ ________ ________ 1 mV Div 7 mV 6 2 mV to 7 8 mV ________ ________ ________ ________ Bandwidth 3 dB Model Test Limits Channel 1 Channel 2 Channel 3 Channel 4 310x 3 dB at 1 GHz ________ ________...

Page 57: ...57 Keysight InfiniiVision 2000 3000 X Series Oscilloscope Service Guide 3 Calibrating and Adjusting This chapter explains how to adjust the oscilloscope for optimum operating performance...

Page 58: ...cilloscope 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 requir...

Page 59: ...Use 50 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...

Page 60: ...connect a BNC f to BNC f barrel connector to the tee as shown below Figure 11 User Calibration cable for 4 channel oscilloscope 4 Connect a BNC cable 40 inches maximum from the TRIG OUT connector on t...

Page 61: ...key 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 Infinii...

Page 62: ...62 2000 3000 X Series Oscilloscopes Service Guide 3 Calibrating and Adjusting...

Page 63: ...channel Next this chapter describes procedures for Verifying Basic Operation of the oscilloscope To power on the oscilloscope To perform hardware self test To perform front panel self test To verify...

Page 64: ...f there is no trace display Check that the Intensity on the front panel is adjusted correctly Recall the default setup by pressing Default Setup This will ensure that the trigger mode is Auto Check th...

Page 65: ...not see a channel Recall the default setup by pressing Default Setup This will ensure that the trigger mode is Auto Check that the oscilloscope probe s BNC connector is securely attached to the oscill...

Page 66: ...cilloscope 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 20 30 seconds for th...

Page 67: ...uctions Failures in the front panel self test indicate problems with the keyboard keypad or display To verify default setup The oscilloscope is designed to turn on with the setup from the last turn on...

Page 68: ...play 20 grid intensity persistence off Other Acquire mode normal Run Stop to Run cursor measurements off Figure 12 Default setup screen 2 If your screen looks substantially different replace the syste...

Page 69: ...d correctly as shown above perform the procedure To compensate passive probes on page 69 If you do not see the waveform ensure your power source is adequate the oscilloscope is properly powered on and...

Page 70: ...trimmer capacitor on the probe for the flattest pulse possible On the N2862 63 90 probes the trimmer capacitor is the yellow adjustment on the probe tip On other probes the trimmer capacitor is locat...

Page 71: ...vice policy for all 2000 3000 X Series oscilloscopes is now unit replacement so there are no longer instructions for replacing internal assemblies in this service guide WARNING No operator serviceable...

Page 72: ...72 2000 3000 X Series Oscilloscopes Service Guide 5 Replacing Assemblies...

Page 73: ...s This chapter describes how to order replaceable assemblies and parts for the Keysight 2000 3000 X Series oscilloscopes Diagrams and parts lists are included for assemblies and hardware that you can...

Page 74: ...l Order System Within the USA Keysight Technologies can supply parts through a direct mail order system There are several advantages to this system Direct ordering and shipping from the Keysight Techn...

Page 75: ...han that of a new part The exchange parts have a part number in the form XXXXX 695XX After receiving the repaired exchange part from Keysight Technologies a United States customer has 30 days to retur...

Page 76: ...graphical representation of the oscilloscope at the time this manual was released Not all parts are shown Your parts may be slightly different than those shown These views provide reference designato...

Page 77: ...0 100 200 MHz exchange 75016 68801 1 Oscilloscope 3000 X Series 2 Ch 100 MHz 75016 69801 1 Oscilloscope 3000 X Series 2 Ch 100 MHz exchange 75017 68801 1 Oscilloscope 3000 X Series 4 Ch 100 200 MHz 75...

Page 78: ...l DSO X 2022A MP1 75014 94302 1 ID Label MSO X 2022A MP1 75015 94301 1 ID Label DSO X 2024A MP1 75015 94302 1 ID Label MSO X 2024A MP1 75016 94303 1 ID Label DSO X 3012A MP1 75016 94304 1 ID Label MSO...

Page 79: ...annel MP33 75019 94310 Overlay Traditional Chinese 4 channel MP33 75019 94330 Overlay Traditional Chinese 2 channel MP33 75019 94312 Overlay Japanese 4 channel MP33 75019 94311 Overlay Japanese 2 chan...

Page 80: ...94323 Overlay Italian 2 channel MP35 75019 42203 1 Hole Plug Option Module W6 Power cord 0 1 Part number varies by country Contact your local Keysight sales office for replacement N2841A or N2862B Pas...

Page 81: ...10 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...

Page 82: ...or voltage reduction or mains isolation 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 i...

Page 83: ...ument If the instrument requires cleaning 1 Remove power from the instrument 2 Clean the external surfaces of the instrument with a soft cloth dampened with a mixture of mild detergent and water 3 Mak...

Page 84: ...ruction 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...

Page 85: ...f test 66 I input voltage maximum 15 internal self tests 66 K Keysight contact information 16 L LED startup sequence 66 M making test connector 21 measurement category 14 definitions 14 N NIST 58 O or...

Page 86: ...threshold accuracy digital channel 24 test diagram 26 trace display problem solving 64 trigger sensitivity 47 sensitivity external 50 sensitivity internal 48 troubleshooting 63 U user calibration 58...

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