Keysight InfiniiVision 4000 X Series Service Manual
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Keysight InfiniiVision 4000 X Series Service Manual

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Keysight InfiniiVision
4000 X-Series
Oscilloscopes
Service
Guide

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Summary of Contents for Keysight InfiniiVision 4000 X Series

  • Page 1 Keysight InfiniiVision 4000 X-Series Oscilloscopes Service Guide...

  • Page 2: Figure 54. Exploded View 2 Of

    The material contained in this document is permit, among other things, that Keysight: (1) provided “as is,” and is subject to being data. Do not proceed beyond a Furnish technical information related to changed, without notice, in future ed itions.

  • Page 3: In This Service Guide

    In This Service Guide This book provides the service information for the Keysight 4000 X-Series oscilloscopes. This manual is divided into these chapters: Characteristics and Specifications This chapter contains a partial list of characteristics and specifications for the Keysight InfiniiVision 4000 X-Series oscilloscopes.
  • Page 4 Digital Channels Because all of the oscilloscopes in the Keysight 4000 X-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.

  • Page 5: Table Of Contents

    Contents In This Service Guide / 3 Figures / 9 Tables / 11 Characteristics and Specifications Power Requirements / 13 Measurement Category / 14 Measurement Category / 14 Measurement Category Definitions / 14 Transient Withstand Capability / 15 Environmental Conditions / 16 Specifications / 16 Contact us / 16 Testing Performance...
  • Page 6 To verify time base accuracy / 44 To verify trigger sensitivity / 46 Test Internal Trigger Sensitivity / 47 Test External Trigger Sensitivity (all models) / 50 Keysight 4000 X-Series Oscilloscopes Performance Test Record / 53 Calibrating and Adjusting User Calibration / 59...
  • Page 7 Contents Troubleshooting Internal Assemblies / 72 Equipment Required for Troubleshooting Internal Assemblies / 72 To prepare for internal assembly troubleshooting / 72 Flowchart for Internal Assembly Power Troubleshooting / 76 System Board Drawings / 76 To check the system board power supply test points / 79 To check the line filter board AC output / 81 To check the power switch / 82 To check the power supply DC output / 83...
  • Page 8 Contents To remove the power supply / 122 Replaceable Parts Ordering Replaceable Parts / 124 Listed Parts / 124 Unlisted Parts / 124 Direct Mail Order System / 124 Exchange Assemblies / 125 Exploded Views / 126 Replaceable Parts List / 128 Safety Notices Warnings / 135 To clean the instrument / 136...

  • Page 9: Figures

    Figures Figure 1. Constructing the 8-by-2 Connector / 22 Figure 2. Setting Up Equipment for Digital Channel Threshold Accuracy Test / 26 Figure 3. Setting up Equipment for DC Vertical Gain Accuracy Test / 32 Figure 4. Using a Blocking Capacitor to Reduce Noise / 34 Figure 5.
  • Page 10 Figures Figure 28. Acquisition board TORX T10 mounting screw locations / 100 Figure 29. Lifting acquisition board off the front deck / 101 Figure 30. Removing the touch controller shield / 102 Figure 31. Lifting the touch controller shield off / 103 Figure 32.

  • Page 11: Tables

    Tables Table 1. List of test equipment / 19 Table 2. Conventions / 20 Table 3. Materials required to construct the test connectors / 21 Table 4. Equipment Required to Test Digital Channel Threshold Accuracy / 24 Table 5. Threshold Accuracy Voltage Test Settings / 27 Table 6.
  • Page 12 Tables 4000 X-Series Oscilloscopes Service Guide...

  • Page 13: Characteristics And Specifications

    This chapter contains a partial list of characteristics and specifications for the Keysight InfiniiVision 4000 X-Series oscilloscopes. For a full list of Keysight InfiniiVision 4000 X-Series oscilloscopes characteristics and specifications see the data sheets. The data sheets are available at www.keysight.com/find/4000X-Series.

  • Page 14: Measurement Category

    Characteristics and Specifications Measurement Category Measurement Category The InfiniiVision 4000 X-Series oscilloscopes are not intended to be used for measurements in Measurement Category II, III, or IV. Use this instrument only for measurements within its specified measurement category WARNING (not rated for CAT II, III, IV). No transient overvol tages allowed. Measurement Category Definitions The "Not rated for CAT II, III, IV"...

  • Page 15: Transient Withstand Capability

    Characteristics and Specifications Transient Withstand Capability Maximum input voltage for analog inputs CAUTION 135 Vrms 50 Ω input: 5 Vrms Input protection is enabled in 50 Ω mode and the 50 Ω load will disconnect if greater than 5 Vrms is detected. However the inputs could still be damaged, depending on the time constant of the signal.

  • Page 16: Environmental Conditions

    Example: Sheltered outdoor environment. Specifications Please see the InfiniiVision 4000 X-Series Oscilloscopes Data Sheet for complete, up-to-date specifications and characteristics. To download a copy of the data sheet please visit: www.keysight.com/find/4000X-Series. Contact us To contact Keysight, see: www.keysight.com/find/contactus 4000 X-Series Oscilloscopes Service Guide...

  • Page 17: Testing Performance

    To verify band width (-3 dB) To verify time base accuracy To verify trigger sensitivity Keysight 4000 X-Series Oscilloscopes Performance Test Record This chapter explains how to verify correct oscilloscope operation and perform tests to ensure that the oscilloscope meets the performance specifications.

  • Page 18: Overview

    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. •...

  • Page 19: List Of Test Equipment

    Keysight 1250-0774 * 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 websites for their equipment. † These parts available at www.parts.Keysight.com at the time this manual was published.

  • Page 20: Conventions

    Termination * 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 websites for their equipment. † These parts available at www.parts.Keysight.com at the time this manual was published.

  • Page 21: To Construct The Test Connector (For Use With Mso Models Only)

    Testing Performance To construct the test connector (for use with MSO models only) Keysight 4000 X-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...

  • Page 22: Figure 1 Constructing The 8-By-2 Connector

    Testing Performance Jumper (2) Ground Lead (from scope’s MSO cable) Signal Lead (from scope’s MSO cable) 8 x 2 Berg Strip BNC Panel Mount Connector Figure 1 Constructing the 8-by-2 Connector 4000 X-Series Oscilloscopes Service Guide...

  • Page 23: To Test Digital Channels (Mso Models Only)

    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.

  • Page 24: To Verify Digital Channel Threshold Accuracy (Mso Models Only)

    DC voltage of -5.5 V to 5.5 V, 10 mV resolution Keysight B2912A/B2962A Adapter (qty 2) BNC(f) to banana(m) Keysight 1251-2277 BNC Tee BNC tee (m) (f) (f) Keysight 1250-0781 or Pomona 3285 Ω BNC Cable (qty 2) BNC - BNC, 48” length Keysight 8120-1840 BNC Test Connector, User-built (See...
  • Page 25 Testing Performance 1 Turn on the test equipment and the oscilloscope. Let them warm up for 30 minutes before starting the test. 2 Set up the precision source. a Set the precision source to provide a DC offset voltage at the Channel 1 output.

  • Page 26: Figure 2 Setting Up Equipment For Digital Channel Threshold Accuracy Test

    Testing Performance Precision Source 4000 X-Series Oscilloscope Digital Multimeter Probe BNC Tee Cables Channels BNC-Bananna Test 8 - 15 Channels Cable Connector 0 - 7 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.

  • Page 27: Table 5 Threshold Accuracy Voltage Test Settings

    Testing Performance 7 Press the User softkey to the right of the D7 - D0 softkey, then turn the Entry knob ( ) on the front panel of the oscilloscope to set the threshold test settings as shown in Table Table 5 Threshold Accuracy Voltage Test Settings Threshold vol tage...
  • Page 28 Testing Performance 9 When testing 4000 X-Series MSOs, use the 8-by-2 test connector to connect digital channels D15-D8 to the output of the precision source. Then connect the D15-D8 ground lead to the ground side of the 8-by-2 connector. 10 Repeat this procedure (steps 6 through 8) for digital channels D15-D8 to verify threshold accuracy and record the threshold levels in the Performance Test Record (see page...

  • Page 29: To Verify Dc Vertical Gain Accuracy

    Adapter (qty 2) BNC (f) to banana (m) Keysight 1251-2277 BNC Tee BNC tee (m) (f) (f) Keysight 1250-0781 or Pomona 3285 Shorting cap Keysight 1250-0774 Blocking capacitor Note: if a BNC blocking capacitor is not available use Keysight 11742A + an SMA blocking capacitor.

  • Page 30: Table 8. Settings Used To Verify Dc Vertical Gain Accuracy

    Testing Performance 2 Set up the oscilloscope. a Adjust the horizontal scale to 200.0 us/d iv. b Set the Volts/Div setting to the value in the first line in Table 8 (depending on the oscilloscope model). c Adjust the channel’s vertical position knob to place the baseline (reference level) at 0.5 major division from the bottom of the display.
  • Page 31 Testing Performance Wait a few seconds for the measurement to settle. 3 Add a measurement for the average voltage: a Press the [Meas] key. b Press Source; then, turn the Entry knob (labeled on the front panel) to select the channel you are testing. c Press Type:;...

  • Page 32: Figure 3. Setting Up Equipment For Dc Vertical Gain Accuracy Test

    Testing Performance Oscilloscope Precision Source BNC Tee Digital Multimeter BNC (f) to dual bananna adapter Figure 3 Setting up Equipment for DC Vertical Gain Accuracy Test 6 Adjust the output so that the multimeter reading displays the first Volts/div precision source setting value in Table 8 (depending on the oscilloscope model).
  • Page 33 Testing Performance The difference in average voltage readings should be within the test limits of Table 8 (depending on the oscilloscope model). If a result is not within the test limits, go to the “Troubleshooting” chapter. Then return here. 11 Disconnect the precision source from the oscilloscope. 12 Repeat this procedure to check the DC vertical gain accuracy with the remaining Volts/div setting values in Table 8...

  • Page 34: Figure 4. Using A Blocking Capacitor To Reduce Noise

    Testing Performance Use a Blocking Capacitor to Reduce Noise On the more sensitive ranges, such as 1 mV/div, 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.

  • Page 35: To Verify Dual Cursor Accuracy

    Adapter (qty 2) BNC (f) to banana (m) Keysight 1251-2277 BNC Tee BNC tee (m) (f) (f) Keysight 1250-0781 or Pomona 3285 Shorting cap Keysight 1250-0774 Blocking capacitor Note: if a BNC blocking capacitor is not available use Keysight 11742A + an SMA blocking capacitor.

  • Page 36: Table 10 Settings Used To Verify Dual Cursor Accuracy

    Testing Performance Table 10 Settings Used to Verify Dual Cursor Accuracy Vol ts/Div Setting Precision Source Test Limits Setting 5 V/Div 35 V 34.032 V 35.968 V 2 V/Div 14 V 13.6128 V 14.3872 V 1 V/Div 6.8064 V 7.1936 V 500 mV/Div 3.5 V 3.4032 V...

  • Page 37: Figure 5. Setting Up Equipment For Dual Cursor Accuracy Test

    Testing Performance 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 Precision Source ground to the DUT ground. Oscilloscope Precision Source BNC Tee Digital Multimeter BNC (f) to dual bananna adapter...

  • Page 38: Figure 6 Using A Blocking Capacitor To Reduce Noise

    Testing Performance 8 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 If a result is not within the test limits, go to the “Troubleshooting”...

  • Page 39: To Verify Bandwidth (-3 Db)

    Equipment Critical Specifications Recommended Model/Part Signal Generator 100 kHz - 1.5 GHz at 200 mVrms Keysight N5171B with 3 GHz option Power Meter 1 MHz - 1.5 GHz ±3% accuracy Keysight N1914A Power Sensor 1 MHz - 1.5 GHz ±3% accuracy...

  • Page 40: Figure 7. Setting Up Equipment For Bandwidth (-3 Db) Verification Test

    Testing Performance Oscilloscope Signal Generator N to BNC Adapter Power Splitter Power Sensor N Cable Power Meter Figure 7 Setting Up Equipment for Band width (-3 dB) Verification Test 2 Set up the power meter. Set the power meter to display measurements in units of watts. 4000 X-Series Oscilloscopes Service Guide...
  • Page 41 Testing Performance 3 Set up the oscilloscope. a Press the [Defaul t Setup] key. b Set channel 1 Coupling to DC. c Set channel 1 Imped to 50 Ohm. d Set the time base to 500 ns/div. e Set the Volts/Div for channel 1 to 200 mV/div. f Press the [Acquire] key, then press the Averaging softkey.
  • Page 42 Testing Performance 9 Change the signal generator output frequency according to the maximum frequency for the oscilloscope using the following: • 1.5 GHz Models: 1.5 GHz • 1 GHz Models: 1 GHz • 500 MHz Models: 500 MHz • 350 MHz Models: 350 MHz •...
  • Page 43 Testing Performance 15 The result from step 14 should be within -3.0 dB. Record the result in the Performance Test Record (see page 53). 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.

  • Page 44: To Verify Time Base Accuracy

    Table 13 Equipment Required to Verify Time Base Accuracy Equipment Critical Specifications Recommended Model/Part Signal Generator 100 kHz - 1.5 GHz, 0.01 Hz frequency resolution, jitter: Keysight N5171B with 3 GHz option <2 ps Ω BNC Cable BNC - BNC, 48” length Keysight 8120-1840 1 Set up the signal generator.
  • Page 45 Testing Performance Time base accuracy limit: ±10 ppm e Record the result and compare it to the limits in the Performance Test Record (see page 53). 4000 X-Series Oscilloscopes Service Guide...

  • Page 46: To Verify Trigger Sensitivity

    Testing Performance To verify trigger sensitivity This test verifies the trigger sensitivity. In this test, you will apply a sine wave to the oscilloscope at the upper bandwidth limit. You will then decrease the amplitude of the signal to the specified levels, and check to see if the oscilloscope is still triggered.

  • Page 47: Test Internal Trigger Sensitivity

    Table 16 Equipment Required to Verify Trigger Sensitivity Equipment Critical Specifications Recommended Model/Part Signal Generator 100 kHz to 1.5 GHz sine waves Keysight N5171B with 3 GHz option Power splitter Outputs differ < 0.15 dB Keysight 11667A ± Power Meter 1.5 GHz...

  • Page 48: Figure 8. Setting Up Equipment For Internal Trigger Sensitivity Test

    Testing Performance 3 Connect the equipment (see Figure a Connect the signal generator output to the oscilloscope channel 1 input. Oscilloscope Signal Generator N to BNC Adapter N Cable Figure 8 Setting Up Equipment for Internal Trigger Sensitivity Test b Set channel 1 Imped to 50 Ohm. 4 To verify the trigger sensitivity at the oscilloscope’s maximum bandwidth, set the output frequency of the signal generator to the maximum bandwidth of the oscilloscope:...
  • Page 49 Testing Performance 5 Perform these steps to test at the 5 mV/div setting: a Set the signal generator amplitude to about 10 mV b Press the [AutoScale] key. c Set the time base to 10 ns/div. d Set channel 1 to 5 mV/div. e Decrease the amplitude from the signal generator until 1 vertical division of the signal (about 5 mV ) is displayed.

  • Page 50: Test External Trigger Sensitivity (All Models)

    Testing Performance Test External Trigger Sensitivity (all models) This test applies to all models. Verify the external trigger sensitivity at these settings: Table 17 External Trigger Sensitivity Test Settings Input Range 100 MHz 200 Mhz 1.6 V 40 mV 70 mV 200 mV 350 mV 1 Connect the equipment (see...
  • Page 51 Testing Performance Oscilloscope Signal Generator 50 Ohm Feedthrough N to BNC Adapter Power Splitter Power Sensor N Cable Power Meter Figure 9 Setting Up Equipment for 4-Channel External Trigger Sensitivity Test 4000 X-Series Oscilloscopes Service Guide...
  • Page 52 Testing Performance 2 Set up the oscilloscope. a Press the [Defaul t Setup] key. b Press the [Mode/Coupling] key; then, press the Mode softkey to select Normal. 3 Change the signal generator output frequency to 100 MHz or 200 MHz. 4 Set the power meter Cal Factor % to the appropriate value (100 MHz or 200 MHz) on the calibration chart on the power sensor.

  • Page 53: Keysight 4000 X-Series Oscilloscopes Performance Test Record

    Testing Performance Keysight 4000 X-Series Oscilloscopes Performance Test Record Serial No. ______________________________________ Test by _____________________________ Test Interval ____________________________________ Work Order No. ______________________ Recommended Next Testing ________________________ Temperature ____________ Threshold Specification Limits Ch D7-D0 Ch D15-D8 Accuracy Test 5 V - 250 mV 4.750 V...
  • Page 54 Testing Performance Dual Cursor Accuracy Range Power Supply Setting Test Limits Channel 1 Channel 2 Channel 3* Channel 4* 5 V/Div 35 V 34.0 V to 36.0 V ________ ________ ________ ________ 2 V/Div 14 V 13.6 V to 14.4 V ________ ________ ________...
  • Page 55 Testing Performance External Trigger Sensitivity Input Range: 8 V Generator Setting Test Limits Ext Trig In 200 MHz 350 mV ________ 100 MHz 200 mV ________ Input Range: 1.6 V Generator Setting Test Limits Ext Trig In 200 MHz 70 mV ________ 100 MHz 40 mV...
  • Page 56 Testing Performance 4000 X-Series Oscilloscopes Service Guide...

  • Page 57: Calibrating And Adjusting

    Keysight InfiniiVision 4000 X-Series Oscilloscope Service Guide 3 Calibrating and Adjusting This chapter explains how to adjust the oscilloscope for optimum operating performance. You should perform self-calibration according to the following recommendations: • Every two years or after 4000 hours of operation •...
  • Page 58 Calibrating and Adjusting REMOVE POWER TO AVOID DAMAGE! CAUTION Do not disconnect any cables or remove any assemblies with power applied to the oscilloscope. Otherwise, damage to the oscilloscope can occur. USE EXTERNAL FAN TO REDUCE TEMPERATURE! CAUTION 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).

  • Page 59: User Calibration

    Calibrating and Adjusting User Calibration Perform user-calibration: • Every two years or after 4000 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.
  • Page 60 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.

  • Page 61: Figure 10 User Calibration Cable For 2-Channel Oscilloscope

    Calibrating and Adjusting Figure 10 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 BNC(f)-to-BNC(f) (barrel connector) to the tee as shown below. To Channel 1 To Channel 2 To Channel 3 Longer cable...

  • Page 62: User Cal Status

    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.

  • Page 63: Troubleshooting

    Keysight InfiniiVision 4000 X-Series Oscilloscope Service Guide 4 Troubleshooting Solving General Problems with the Oscilloscope Verifying Basic Operation Troubleshooting Internal Assemblies Read All Cautions and Warnings Before you begin any troubleshooting, read all Warning and Cautions in the “Troubleshooting” section.

  • Page 64: Solving General Problems With The Oscilloscope

    Solving General Problems with the Oscilloscope This section describes how to solve general problems that you may encounter while using the Keysight 4000 X-Series oscilloscopes. After troubleshooting the oscilloscope, if you need to replace parts, refer to Chapter 6, “Replaceable Parts,” starting on page 123.

  • Page 65: If The Trace Display Is Unusual Or Unexpected

    Troubleshooting Press the [AutoScale] key. Obtain service from Keysight Technologies, if necessary. If the trace display is unusual or unexpected Check that the Horizontal time/division setting is correct for the expected frequency range of the input signals. 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.
  • Page 66 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.

  • Page 67: Verifying Basic Operation

    When the oscilloscope is turned on, the front panel LEDs will briefly light up in groups from bottom to top. • Next the Keysight logo appears on the display. • Next a message will appear with tips on getting started using the oscilloscope.

  • Page 68: To Perform Front Panel Self Test

    Troubleshooting Successfully passing Hardware Self Test does not guarantee 100% of the oscilloscope's functionality. Hardware Self Test is designed to provide an 80% confidence level that the oscilloscope is operating properly. To perform front panel self test Pressing [Utility] > Service > Front Panel Sel f Test lets you test the front panel keys and knobs as well as the oscilloscope display.

  • Page 69: Figure 12 Default Setup Screen

    Troubleshooting • 0 V level. • channel 1 source. • dc coupling. • rising edge slope. • 40 ns holdoff time. • Display: • 20% grid intensity. • persistence off. • Other: • Acquire mode normal. • Run/Stop to Run. •...

  • Page 70: To Perform An Auto Scale On The Probe Comp Signal

    Troubleshooting To perform an Auto Scale on the Probe Comp signal 1 Press the [Defaul t Setup] key. 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.

  • Page 71: To Compensate Passive Probes

    Troubleshooting To compensate passive probes You should compensate your passive probes to match their characteristics to the oscilloscope’s channels. A poorly compensated probe can introduce measurement errors. 1 Perform the procedure “To perform an Auto Scale on the Probe Comp signal"...

  • Page 72: Troubleshooting Internal Assemblies

    If you need parts or assistance from Keysight Technologies to repair your instrument, go to www.Keysight.com and locate the service facility for your area.
  • Page 73 Troubleshooting HAZARDOUS VOLTAGES EXIST — HIGH VOLTAGE IS PRESENT ON POWER SUPPLY HEAT SINKS ! WARNING The power supply heat sinks of the 4000 X-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 when the power cord is attached to the oscilloscope! REMOVE POWER TO AVOID DAMAGE ! CAUTION...

  • Page 74: Figure 14 Setup For Troubleshooting Internal Assemblies

    Troubleshooting 5 Separate the front and rear decks following the instructions on page 95. but leave all cables except the fan power cable connected as shown in the following figure. Figure 14 Setup for troubleshooting internal assemblies MAKE SURE EARTH GROUND IS MAINTAINED FOR THE FRONT DECK ! CAUTION For example, connect a cable with alligator clips between the rear deck chassis and the front deck chassis, or connect a BNC cable from one of the BNCs on the system board to a known grounded BNC on...
  • Page 75 Troubleshooting USE AN EXTERNAL FAN TO AVOID OVERHEATING COMPONENTS ! CAUTION 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.

  • Page 76: Flowchart For Internal Assembly Power Troubleshooting

    Troubleshooting Flowchart for Internal Assembly Power Troubleshooting The following flowchart is a simplified overview of troubleshooting power to the oscilloscope’s internal assemblies. Start Power Replace Line Supply Voltage Supply AC Input Filter Board Replace Okay? Okay? System Board Display/ System Replace Line Power Switch Keybd Supplies...

  • Page 77: Figure 15 System Board Test Points/Connectors - Top Side, Left

    Troubleshooting Figure 15 System Board Test Points/Connectors - Top Side, Left 4000 X-Series Oscilloscopes Service Guide...

  • Page 78: Figure 16 System Board Test Points/Connectors - Top Side, Right

    Troubleshooting Figure 16 System Board Test Points/Connectors - Top Side, Right 4000 X-Series Oscilloscopes Service Guide...

  • Page 79: To Check The System Board Power Supply Test Points

    Troubleshooting To check the system board power supply test points This procedure checks the power supply test points on the system board (see See Figure 16 on page 78). Values outside the expected range help identify bad assemblies. 1 Follow the instructions in “To prepare for internal assembly troubleshooting"...
  • Page 80 Troubleshooting 5 Next, check the supplies coming from the system board: Test Point Expected Value Assemblies If Good If Bad (near J3700) Supplied VP5V (+5V) +5 V ±3% Keyboard, Indicates supply coming from Replace the system board. System Board system board is good. VP12V (+12V) +12 V ±3% System Board...

  • Page 81: To Check The Line Filter Board Ac Output

    Troubleshooting To check the line filter board AC output When the 13 V bulk power is not being properly supplied, this procedure tests the AC input to the power supply to determine whether there is a problem with the line filter board.

  • Page 82: To Check The Power Switch

    Troubleshooting • If there is AC power at J1 of the power supply, but the instrument still will not power ON when the power switch (S101) is in the ON position, go to “To check the power switch" on page 82. To check the power switch This procedure verifies the operation of the power switch (S101) on the line filter board assembly.

  • Page 83: To Check The Power Supply Dc Output

    Troubleshooting • With S101 in the ON position (switch contacts open) you should measure infinite resistance. If you do not measure these two values, there is something wrong with the power switch (S101 on the line filter assembly), and you need to replace the line filter assembly.

  • Page 84: To Check The Display Supplies

    Troubleshooting If replacing the cable does not fix the problem, there is something wrong with the power switch S101, and you must replace the line filter assembly. To check the display supplies This procedure checks the display supply voltages on the system board test points when the display backlight power cable and the display cable are disconnected.

  • Page 85: To Check The Keyboard Supplies

    Troubleshooting Test Point Expected Value Assemblies If Good If Bad (near J2000) Supplied VP3V3 (+3.3V) +3.3 V ±3% LCD, System If good when the display cable is Replace the system board. Board disconnected from the system board, but bad when the display cable is connected, this indicates a problem with either the display cable or the display assembly,...

  • Page 86: To Check The Fan

    Troubleshooting 5 Check the keyboard supplies: Test Point Expected Value Assemblies If Good If Bad (near J4303) Supplied VP5V (+5V) +5 V ±3% Keyboard, If good when the keyboard cable is Replace the system board. System Board disconnected from the system board, but bad when the keyboard VP13V_PRB +13 V ±3%...

  • Page 87: Figure 19 Location Of The Fan Connector

    Troubleshooting 5 If the fan voltage is approximately +9 Vdc at room temperature, replace the fan. If the fan voltage is not approximately +9 Vdc, replace the system board. The proper voltage range depending on temperature is between +7.9 Vdc to +12.8 Vdc.
  • Page 88 Troubleshooting 4000 X-Series Oscilloscopes Service Guide...

  • Page 89: Replacing Assemblies

    Keysight InfiniiVision 4000 X-Series Oscilloscope Service Guide 5 Replacing Assemblies The service policy for 200 MHz and lower bandwidth oscilloscopes is unit replacement, so the instructions in this chapter are primarily for the 350 MHz, 500 MHz, and 1 GHz bandwidth oscilloscopes.
  • Page 90 Replacing Assemblies Tools Used for Disassembly Use these tools to remove and replace the oscilloscope assemblies: • T6, T10, and T20 TORX drivers. • 5/8-inch socket driver or adjustable wrench (for BNC nuts). • Flat head screw driver. See how the Oscilloscope Parts Fit Together An exploded view of the oscilloscope is included in the “Replaceable Parts”...
  • Page 91 Replacing Assemblies AVOID DAMAGE TO ELECTRONIC COMPONENTS! CAUTION ELECTROSTATIC DISCHARGE (ESD) can damage electronic components. When doing any of the procedures in this chapter, use proper ESD precautions. As a minimum, you should place the instrument on a properly grounded ESD mat and wear a properly grounded ESD strap. 4000 X-Series Oscilloscopes Service Guide...

  • Page 92: To Remove The Handle

    Replacing Assemblies To remove 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 the strap handle off the cabinet.

  • Page 93: To Remove The Adjustable Legs

    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. Figure 21 Removing adjustable legs 4000 X-Series Oscilloscopes Service Guide...

  • Page 94: To Remove The Cabinet

    Replacing Assemblies To remove the 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.

  • Page 95: To Remove The Rear Deck Assembly

    Replacing Assemblies To remove the rear deck assembly Removing the rear deck allows access to the front deck, acquisition board, and inverter board. 1 Remove the BNC securing nuts and washers. Figure 23 Removing the BNC securing nuts and washers 4000 X-Series Oscilloscopes Service Guide...

  • Page 96: Figure 24 Removing The Rear Deck Assembly

    Replacing Assemblies 2 Using a T20 TORX, locate and remove all screws securing rear deck to front deck. Figure 24 Removing the rear deck assembly 3 Carefully separate rear deck from front deck. Take care not damage extender switch. Sheet metal parts may have sharp edges. Handle with care to avoid injury. WARNING 4000 X-Series Oscilloscopes Service Guide...

  • Page 97: Figure 25 Separating Front And Rear Deck Assemblies

    Replacing Assemblies 4 Disconnect power harness and fan cable from acquisition board. Note cable locations for re-assembly Figure 25 Separating front and rear deck assemblies 4000 X-Series Oscilloscopes Service Guide...

  • Page 98: To Replace The Battery

    Replacing Assemblies To replace the battery If the battery needs to be replaced, use a CR2032/1HG or CR2032/HGN 3V manganese dioxide lithium battery. Figure 26 Battery location 4000 X-Series Oscilloscopes Service Guide...

  • Page 99: To Remove The Acquisition Board

    Replacing Assemblies To remove the acquisition board 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 27 Removing the analog channel BNC securing T6 screws 2 Disconnect Inverter, keyboard and display cables.

  • Page 100: Figure 28 Acquisition Board Torx T10 Mounting Screw Locations

    Replacing Assemblies 3 Using a TORX T10 driver locate and remove 15 mounting screws. Figure 28 Acquisition board TORX T10 mounting screw locations 4000 X-Series Oscilloscopes Service Guide...

  • Page 101: Figure 29 Lifting Acquisition Board Off The Front Deck

    Replacing Assemblies 4 Carefully lift acquisition board off front deck. Figure 29 Lifting acquisition board off the front deck 4000 X-Series Oscilloscopes Service Guide...

  • Page 102: To Remove The Touch Controller Board

    Replacing Assemblies To remove the touch controller board 1 Using a TORX T10 driver locate and remove the two screws securing the touch controller shield. Figure 30 Removing the touch controller shield 4000 X-Series Oscilloscopes Service Guide...

  • Page 103: Figure 31 Lifting The Touch Controller Shield Off

    Replacing Assemblies Figure 31 Lifting the touch controller shield off 4000 X-Series Oscilloscopes Service Guide...

  • Page 104: Figure 32 Removing The Touch Controller Board

    Replacing Assemblies 2 Remove the three screws securing the touch controller board to the front deck. Figure 32 Removing the touch controller board 3 Disconnect all cables, lift board off front deck. 4000 X-Series Oscilloscopes Service Guide...

  • Page 105: To Remove The Front Panel Knobs

    Replacing Assemblies To remove the front panel knobs The front panel knobs must be removed prior to localized front panel overlay installation or front panel disassembly. 1 Gently pull on the front panel knobs to remove them. Figure 33 Removing the front panel knobs 4000 X-Series Oscilloscopes Service Guide...

  • Page 106: To Remove The Front Bezel Assembly

    Replacing Assemblies To remove the front bezel 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: Thin sheet metal parts may have sharp edges. Handle with care to avoid injury. WARNING Figure 34 Removing the keyboard cable shield...

  • Page 107: Figure 35 Disconnecting The Keyboard Cable

    Replacing Assemblies 2 Disconnect the end of the keyboard cable that extends thru front deck. Figure 35 Disconnecting the keyboard cable 4000 X-Series Oscilloscopes Service Guide...

  • Page 108: Figure 36 Removing The Display Cable From The Guide

    Replacing Assemblies 3 Remove the display cable from the cable guide. Figure 36 Removing the display cable from the guide 4000 X-Series Oscilloscopes Service Guide...

  • Page 109: Figure 37 Removing The Bezel

    Replacing Assemblies 4 Remove the bezel from the front deck. The 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.

  • Page 110: To Remove The Display Assembly

    Replacing Assemblies To remove the display assembly 1 Using a TORX T10 remove the two screws that secure the display assembly to the front deck. Figure 38 Removing the display assembly 4000 X-Series Oscilloscopes Service Guide...

  • Page 111: Figure 39 Disconnecting The Backlight Power Cable

    Replacing Assemblies 2 Disconnect the backlight power cable. Figure 39 Disconnecting the backlight power cable Take care while threading display cables thru front deck sheet metal openings. 4000 X-Series Oscilloscopes Service Guide...

  • Page 112: To Remove The Keyboard And Keypad

    Replacing Assemblies To remove the keyboard and keypad 1 Remove the softkey board cable from the keyboard board. Slide the connector clamp toward the softkey board; then, slide the ribbon cable out. Figure 40 Disconnecting the softkey board cable 4000 X-Series Oscilloscopes Service Guide...

  • Page 113: Figure 41 Removing The Keyboard

    Replacing Assemblies 2 To separate the keyboard board from the bezel, carefully pull back locking tabs that secure it. Figure 41 Removing the keyboard Figure 42 Keyboard and keypad removed 4000 X-Series Oscilloscopes Service Guide...

  • Page 114: Figure 43 Unclip The Softkey Board From The Bezel

    Replacing Assemblies 3 To separate the softkey board from the bezel, carefully pull back locking tabs that secure it. Figure 43 Unclip the softkey board from the bezel Figure 44 Softkey board and keypad removed 4000 X-Series Oscilloscopes Service Guide...

  • Page 115: To Remove The Fan Assembly

    Replacing Assemblies To remove the fan assembly 1 Ensure 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.

  • Page 116: To Remove The Power Supply Shield

    Replacing Assemblies To remove the power supply shield 1 To remove power supply shield, locate and remove using a TORX T20 the four screws securing the power supply shield to the rear deck. Figure 46 Removing the power supply shield Thin sheet metal parts may have sharp edges.

  • Page 117: Figure 47 Power Supply Shield Removed

    Replacing Assemblies 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 47 Power supply shield removed 4000 X-Series Oscilloscopes Service Guide...

  • Page 118: Figure 48 Removing The Air Duct

    Replacing Assemblies 3 Carefully remove the air duct by lifting it up and off the rear deck. Figure 48 Removing the air duct 4000 X-Series Oscilloscopes Service Guide...

  • Page 119: To Remove The Line Filter Board

    Replacing Assemblies To remove the line filter board 1 Disconnect the ground wire from its chassis terminal. Figure 49 Disconnecting the ground wire 2 Disconnect all cables from the line filter board to the power supply and remove the cables from the cable guide. 4000 X-Series Oscilloscopes Service Guide...

  • Page 120: Figure 50 Removing The Line Filter Board

    Replacing Assemblies 3 Locate and remove using a TORX T20 driver the single screw securing the assembly to the rear deck. Figure 50 Removing the line filter board 4 Slide assembly to right and lift out of rear deck. 5 Take care that you do not damage the switch extender during removal. 4000 X-Series Oscilloscopes Service Guide...

  • Page 121: Figure 51 Removing Power Switch Extender

    Replacing Assemblies 6 To remove the switch extender, gently pry open the extender using a flat head screwdriver. Twisting the latch too much could cause it to break! CAUTION Figure 51 Removing power switch extender 4000 X-Series Oscilloscopes Service Guide...

  • Page 122: To Remove The Power Supply

    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 52 Removing the power supply 4000 X-Series Oscilloscopes Service Guide...

  • Page 123: Replaceable Parts

    Keysight InfiniiVision 4000 X-Series Oscilloscope Service Guide 6 Replaceable Parts This chapter describes how to order replaceable assemblies and parts for the Keysight 4000 X-Series oscilloscopes. Diagrams and parts lists are included for assemblies and hardware that you can order.

  • Page 124: Ordering Replaceable Parts

    Ordering Replaceable Parts Listed Parts To order a part in the parts list, quote the Keysight Technologies part number, indicate the quantity desired, and address the order to the nearest Keysight Technologies Sales Office. To find your nearest sales office go to www.Keysight.com.

  • Page 125: Exchange Assemblies

    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 return the faulty assembly. For orders not originating in the United States, contact the local Keysight Technologies service organization.

  • Page 126: Exploded Views

    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 than those shown. These views provide reference designator numbers that map to those used in the parts list table in this chapter.
  • Page 127 Replaceable Parts MP12 MP15 MP14 MP28 MP27 MP13 MP29 MP25 MP32 MP30 Figure 54 Exploded View 2 of 2 4000 X-Series Oscilloscopes Service Guide...

  • Page 128: Replaceable Parts List

    Replaceable Parts List The information given for each part consists of the following: • Reference designation. • Keysight Technologies part number. • Total quantity (Qty) in the instrument or on assembly. • Description of the part. Table 19 Replaceable Parts...
  • Page 129 Replaceable Parts Table 19 Replaceable Parts (continued) Ref Des Keysight Part Description Number 54709-66421 PCA - 2 Channel Keyboard 4000 X-Series 54709-66422 PCA - 4 Channel Keyboard 4000 X-Series 54709-66425 Touch Panel Controller board 0950-5419 Power Supply Switching AC/DC 150W...
  • Page 130 Replaceable Parts Table 19 Replaceable Parts (continued) Ref Des Keysight Part Description Number 54709-24701 Spacer (at bottom of acquisition board) 54702-94301 ID Label DSO-X 4022A 54702-94302 ID Label MSO-X 4022A 54703-94301 ID Label DSO-X 4024A 54703-94302 ID Label MSO-X 4024A...
  • Page 131 Replaceable Parts Table 19 Replaceable Parts (continued) Ref Des Keysight Part Description Number 54707-94303 Front Keyboard Label 2 Channel 54709-94303 Front Keyboard Label 4 Channel 54709-60201 Panel Bezel Assembly 54709-41901 Keyboard Keypad 54709-41903 Softkey Keypad MP10 54709-44101 Front Cover MP12...
  • Page 132 Replaceable Parts Table 19 Replaceable Parts (continued) Ref Des Keysight Part Description Number MP30 54709-64401 Cabinet Assembly MP31 5042-6805 Cap - Strap Handle MP32 54695-44701 Foot Pad MP33 54709-94310 Overlay - Traditional Chinese, 4 channel (not shown) MP33 54709-94309 Overlay - Traditional Chinese, 2 channel (not shown)
  • Page 133 54709-61609 Cable - Remote (not shown) 54709-61610 Soft Keyboard Cable (not shown) Not shown Power cord Part number varies by country. Contact your local Keysight sales office for replacement. Not shown N2894A Passive Probe 10:1, 700 MHz Not shown N2763-60001 Rack Mount Kit for 4000 X-Series Oscilloscope *Optional item.
  • Page 134 Replaceable Parts 4000 X-Series Oscilloscopes Service Guide...

  • Page 135: Safety Notices

    Keysight InfiniiVision 4000 X-Series Oscilloscope Service Guide 7 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).

  • Page 136: To Clean The Instrument

    Safety Notices Do not install substitute parts or perform any unauthorized modification to the instrument. Capacitors inside the instrument may retain a charge even if the instrument is disconnected from its source of supply. Do not operate the instrument in the presence of flammable gasses or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

  • Page 137: Index

    77, cleaning the instrument, power requirements, compensating your probe, probe connecting for threshold test, N2894A, keyboard, removal, contact Keysight, probes Keysight compensating, contact information, problem solving, DC vertical gain accuracy, digital channel LED, startup sequence, testing,...
  • Page 138 Index replacing assemblies, trigger, run self-tests, warnings, 90, safety notice, 57, 72, warranted specifications, self test, front panel, self test, hardware, self-alignment, user cal, self-tests, specifications, startup sequence, status, User Cal, status, user cal, storage lid, removal, test connector, constructing, digital channels, equipment, points, power, 77,...

This manual is also suitable for:

Infiniivision mso-x 4022aInfiniivision dso-x 4022aInfiniivision mso-x 4024aInfiniivision dso-x 4024aInfiniivision mso-x 4032aInfiniivision dso-x 4032a ... Show all

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