Keysight InfiniiVision HD3 Series Service Manual

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Keysight InfiniiVision HD3-Series

Oscilloscopes

SERVICE GUIDE

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Page 1 Keysight InfiniiVision HD3-Series Oscilloscopes SERVICE GUIDE...
Page 2: Print History
Keysight shall not be liable for documentation. No additional government Do not proceed beyond a WARNING errors or for incidental or consequential...
Page 3: In This Service Guide
In This Service Guide This book provides the service documentation for the Keysight Technologies HD3 Series oscilloscopes. It is has these chapters: Chapter 1, “Characteristics and Specifications,” starting on page 7, contains a partial list of characteristics and specifications for the Keysight InfiniiVision HD3-Series oscilloscopes.
Page 4 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 5: Table Of Contents
To verify DC vertical gain accuracy / 29 Use a Blocking Capacitor to Reduce Noise / 33 To verify dual marker accuracy / 34 To verify bandwidth (-3 dB) / 38 To verify time base accuracy / 43 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 6 To verify external trigger sensitivity / 45 Keysight HD3-Series Oscilloscopes Performance Test Record / 48 4 Troubleshooting Solving General Problems with the Oscilloscope / 52 If there is no display / 52 If there is no trace display / 52...
Page 7: Characteristics And Specifications
Contact Us / 12 This chapter contains a partial list of characteristics and specifications for the Keysight InfiniiVision HD3-Series oscilloscopes. For a full list of Keysight InfiniiVision HD3-Series oscilloscopes characteristics and specifications see the data sheets. The data sheets are available at...
Page 8: Power Requirements
Line voltage, frequency, and power: • ~ 100-120 Vac, 50/60/400 Hz • ~ 100-240 Vac, 50/60 Hz • 275 Watts MAX Mains supply voltage fluctuations are not to exceed ±10% of the nominal supply voltage. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 9: Measurement Category
Measurement category IV is for measurements performed at the source of the low-voltage installation. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 10: Maximum Input Voltages
The 50 Ω input protection only functions when the oscilloscope is powered on. When measuring voltages over 80 V, use a 10:1 probe. CAUTION Maximum input voltage at digital channels CAUTION ±40 V peak Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 11: Environmental Conditions
Occasionally a temporary conductivity caused by condensation may occur. Example: General indoor environment. Pollution Degree 3: Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive due to condensation which is expected. Example: Sheltered outdoor environment. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 12: Contact Us
Characteristics and Specifications Contact Us Information on contacting Keysight Technologies can be found at: www.keysight.com/find/contactus Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 13: Calibrating And Adjusting
Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide 2 Calibrating and Adjusting To display the user calibration status / 14 To perform user calibration / 15...
Page 14: To Display The User Calibration Status
From the main menu, choose Utilities > Service..In the Service dialog box, select the Calibration tab. Note that passive probes do not need to be calibrated, but InfiniiMax probes can be calibrated. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 15: To Perform User Calibration
Allow the oscilloscope to warm up 30 minutes before performing this procedure. From the main menu, choose Utilities > Service..In the Service dialog box, select the Calibration tab. Clear the Cal Protect check box. Select Start User Calibration. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 16 Calibrating and Adjusting Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 17: Testing Performance
To verify time base accuracy / 43 To verify external trigger sensitivity / 45 Keysight HD3-Series Oscilloscopes Performance Test Record / 48 This chapter explains how to verify correct oscilloscope operation and perform tests to ensure that the oscilloscope meets the performance specifications.
Page 18: Overview
Verifying Test During the tests, record the readings in the Performance Test Record (see Results "Keysight HD3-Series Oscilloscopes Performance Test Record" on page 48). To verify whether a test passes, verify that the reading is within the limits in the Performance Test Record.
Page 19: List Of Test Equipment
Keysight 1250-0774 Blocking capacitor Note: if a BNC blocking capacitor is not available use an SMA Keysight 11742A + blocking capacitor. Pomona 4289 + Pomona 5088 Adapter (qty 3) N(m) to BNC(f) Keysight 1250-0780 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 20 50Ω BNC (f) to BNC (m) Keysight 0960-0301 Termination * Required only for testing digital channels. 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: Conventions
HD302MSO and HD304MSO, standard bandwidth 200 MHz Models HD302MSO and HD304MSO, 350 MHz bandwidth option 350 MHz Models HD302MSO and HD304MSO, 500 MHz bandwidth option 500 MHz Models HD302MSO and HD304MSO, 1 GHz bandwidth option 1 GHz Models Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 22: To Construct The Digital Channels Test Connector
Testing Performance To construct the digital channels test connector Keysight HD3-Series oscilloscopes have digital channels that require the test connector described below. Follow the steps to build the test connector. Table 3 Materials required to construct the test connectors Description...
Page 23 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 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 24: To Test Digital Channels
Use steps 2 and 3 to test the following sets of digital channels. After you test one set of digital channels, remove them before connecting the next set. • D4, D5, D6, D7 • D8, D9, D10, D11 • D12, D13, D14, D15 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 25: To Verify Digital Channel Threshold Accuracy
Digital channels test For instructions on building test connector, see "To connector, 8-by-2* construct the digital channels test connector" page 22. Probe cable No substitute 16-chanel: Keysight N6450-60001 or N2756-60001 8-channel: Keysight N6459-60001 or N2755-60001 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 26 Testing Performance Precision Source HD3-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 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 27 For each of the threshold voltage levels shown in the previous Threshold Accuracy Voltage Test Settings table: Set the threshold voltage in the User fields for the D7 - D0 channnels. On the precision source front panel, enter the corresponding DC offset voltage. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 28 10 mV, until the activity indicators for digital channels D7-D0 are all at digital low levels. Record the precision source voltage in the "Keysight HD3-Series Oscilloscopes Performance Test Record" on page 48. Use the knob on the precision source to increase the offset voltage, in increments of 10 mV, until the activity indicators for digital channels D7-D0 are all at digital high levels.
Page 29: To Verify Dc Vertical Gain Accuracy
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 an SMA Keysight 11742A + blocking capacitor. Pomona 4289 + Pomona 5088 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 30 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 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 31 Full scale is defined as 16 mV on the 2 mV/div, 1 mV/div, and 500 μV/div range. Full scale on all other ranges is defined as 8 divisions times the V/div setting. Recall the factory default setup: From the main menu, choose Control > Default..In the Default dialog box, select Factory Default. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 32 The difference in average voltage readings should be within the test limits of the previous settings table (depending on the oscilloscope model). If a result is not within the test limits, go to Chapter 4, “Troubleshooting,” starting on page 51. Then return here. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 33: Use A Blocking Capacitor To Reduce Noise
For details, see "Blocking capacitor" in the "List of Test Equipment" on page 19. Blocking Capacitor shorting cap To oscilloscope input Figure 4 Using a Blocking Capacitor to Reduce Noise Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 34: To Verify Dual Marker Accuracy
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 an SMA Keysight 11742A + blocking capacitor. Pomona 4289 + Pomona 5088 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 35 Testing Performance Oscilloscope Precision Source BNC Tee Digital Multimeter BNC (f) to dual bananna adapter Figure 5 Setting up Equipment for Dual Marker Accuracy Test Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 36 Open the Acquire dialog box by selecting the sample rate and memory depth (Acquire) badge or by choosing Setup > Acquire... from the main menu. From the Acq Mode drop-down list, select Averaging. In the # of Averages field, enter 64. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 37 Disconnect the precision source from the oscilloscope. Repeat this procedure to check the dual marker accuracy with the remaining Volts/div setting values in the previous settings table. Finally, repeat this procedure for the remaining channels to be tested. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 38: To Verify Bandwidth (-3 Db)
Power Splitter Outputs differ by 0.15 dB Keysight 11667A Cable Type N (m) 609.6 mm (24 in.) Keysight 11500B Adapter Type N (m) to BNC (m) Keysight 1250-0082 or Pomona 3288 with Pomona 3533 Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 39 Connect the power sensor to one output of the power splitter. Use an N-to-BNC adapter to connect the other splitter output to the channel 1 input. Set up the power meter. Set the power meter to display measurements in units of watts. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 40 For example, if the power meter reading is 892 uW, then Vin = (892*10-6 * 1MHz 50Ω) = 211.2 mVrms. Change the signal generator output frequency according to the maximum frequency for the oscilloscope using the following: • 1 GHz Models: 1 GHz Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 41 Then after converting the values from the power meter to Vrms: The result from step 14 should be within -3.0 dB. Record the result in the "Keysight HD3-Series Oscilloscopes Performance Test Record" on page 48. Move the power splitter from the channel 1 to the channel 2 input.
Page 42 Turn off the current channel and turn on the next channel using the channel keys. Repeat steps 3 through 17 for the remaining channels, setting the parameters of the channel being tested where appropriate. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 43: To Verify Time Base Accuracy
The number of nanoseconds is equivalent to the time base error in ppm. Time base accuracy limit: ±1.6 ppm + aging Aging factors: • 1 year: ±0.5 ppm • 2 years: ±0.7 ppm Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 44 Use the date code on the oscilloscope's serial tag to calculate the number of years since manufacture. Date Code: 0747 07 = Year 47 = Week Record the result and compare it to the limits in the "Keysight HD3-Series Oscilloscopes Performance Test Record" on page 48. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 45: To Verify External Trigger Sensitivity
DC to 100 MHz 200 mVpp 100 MHz to 500 MHz 350 mVpp Verify the external trigger sensitivity at these settings: Table 16 External Trigger Sensitivity Test Settings 100 MHz 500 MHz 200 mVpp 350 mVpp Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 46 Use the N cable to connect the signal generator to the power splitter input. Connect one output of the power splitter to the Aux Trig input through a 50Ω feedthrough termination. Connect the power sensor to the other output of the power splitter. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 47 Record the results as Pass or Fail in the "Keysight HD3-Series Oscilloscopes Performance Test Record" on page 48. If the test fails, see Chapter 4, “Troubleshooting,” starting on page 51. Then return here. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 48: Keysight Hd3-Series Oscilloscopes Performance Test Record
Testing Performance Keysight HD3-Series Oscilloscopes Performance Test Record Keysight Technologies Keysight InfiniiVision HD3-Series Oscilloscopes Model Number: Tested by: Serial Number: Work Order No.: Recommended Test Interval—3 Years/6000 hours Date: Recommended next test date: Ambient temperature: Table 17 Digital Channel Threshold Accuracy Test...
Page 49 Channel 4 (if present) (if present) 1 GHz -3 dB at 1 GHz 500 MHz -3 dB at 500 MHz 350 MHz -3 dB at 350 MHz 200 MHz -3 dB at 200 MHz Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 50 (1 year: ±0.5 ppm, 2 years: ±0.7 ppm, 5 years: ±1.5 ppm, 10 years: ±2.0 ppm) Table 22 External Trigger Sensitivity Test Generator Setting Test Limits Pass/Fail 500 MHz 350 mV 100 MHz 200 mV Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 51: Troubleshooting
Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide 4 Troubleshooting Solving General Problems with the Oscilloscope / 52 Verifying Oscilloscope Operation / 54 This chapter begins with "Solving General Problems with the Oscilloscope" page 52. It tells you what to do in these cases: •...
Page 52: Solving General Problems With The Oscilloscope
Check that the circuit under test is powered on.  Press the [Auto Scale] 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 ...
Page 53: If You Cannot See A Channel
Check that the desired oscilloscope channels are turned on.  Press the analog channel key until it is illuminated. Press the digital channels [Digital] key until it is illuminated. Press the [Auto Scale] key to automatically set up all channels.  Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 54: Verifying Oscilloscope Operation
To perform hardware self test To perform a series of internal procedures to verify that the oscilloscope is operating properly: From the main menu, choose Utilities > Service..In the Service dialog box, select the Diagnostics tab. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 55: To Perform Front Panel Self Test
When the test is complete, status information appears in the Test Summary box. To verify default setup The oscilloscope is designed to turn on with the setup from the last turn on or previous setup. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 56 All custom labels that you have created in the Label Library are preserved (not erased), but all channel labels will be set to their original names. Figure 8 Default setup screen If your screen looks substantially different, the oscilloscope may need to be returned for service. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 57: To Perform An Auto Scale On The Probe Comp Signal
Each oscilloscope passive probe must be compensated to match the input characteristics of the oscilloscope channel to which it is connected. A poorly compensated probe can introduce significant measurement errors. Input the Probe Comp signal. Press [Default Setup] to recall the default oscilloscope setup. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 58 2, 3, and 4 of a 4-channel oscilloscope). Repeat the procedure for each channel. The process of compensating the probes serves as a basic test to verify that the oscilloscope is functional. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 59: Replacing Assemblies
Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide 5 Replacing Assemblies Because there are no operator serviceable parts inside the oscilloscope, there are no instructions for replacing internal assemblies in this service guide. No operator serviceable parts inside. Refer servicing to qualified personnel. To WARNING prevent electrical shock, do not remove covers.
Page 60 Replacing Assemblies Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 61: Replaceable Parts
Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide 6 Replaceable Parts Ordering Replaceable Parts / 62 Exploded View / 63 Replaceable Parts List / 64 This chapter describes how to order replaceable assemblies and parts for the Keysight HD3-Series oscilloscopes. Diagrams and parts lists are included for assemblies and hardware that you can...
Page 62: Ordering Replaceable Parts
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. Unlisted Parts To order a part not listed in the parts list, include the oscilloscope part number, oscilloscope serial number, a description of the part (including its function), and the number of parts required.
Page 63: Exploded View
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. MP10 Figure 9 Exploded View Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 64: Replaceable Parts List
54760-94332 Label 500MHz 54760-94333 Label 1GHz 54760-94304 Label InfiniiVision 54762-94300 Label Keyboard 4Ch 54763-94300 Label Keyboard 2Ch 54760-94303 Label 4Ch 54761-94301 Label 2Ch 54964-47405 Small Rotary Knob 54964-47450 Large Rotary Knob 54760-94305 Label IO Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 65 MP11 54763-94350 Overlay - Italian, 2 channel (not shown) Not shown Power cord Part number varies by country. Contact your local Keysight sales office for replacement. Not shown N2843A Passive Probe 10:1, 500 MHz Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 66 Replaceable Parts Table 23 Replaceable Parts (continued) Ref. Des. Keysight Part Number Description Not shown 54760-60002 Rack Mount Kit for HD3-Series Oscilloscope * Optional item. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 67: Safety Notices
Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide 7 Safety Notices Warnings / 68 To clean the instrument / 69 Safety Symbols / 70 This apparatus has been designed and tested in accordance with the following safety standards and has been supplied in a safe condition: IEC 61010-1:2010;...
Page 68: Warnings
• 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. • Do not use the instrument in a manner not specified by the manufacturer. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 69: To Clean The Instrument
Clean the external surfaces of the instrument with a soft cloth dampened with a mixture of mild detergent and water. Make sure that the instrument is completely dry before reconnecting it to a power source. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 70: Safety Symbols
Hazardous voltage symbol. Earth terminal symbol: Used to indicate a circuit common connected to grounded chassis. Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 71 Probe Comp signal, Autoscale, front panel self test, problems, general, solving, problems, no channel display, problems, no display, problems, no trace display, problems, unusual trace display, Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...
Page 72 Index Keysight InfiniiVision HD3-Series Oscilloscopes Service Guide...

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