Download
Share
Print this page
Keysight Technologies Infiniium 90000 Q Series Service Manual
  1. Manuals
  2. Brands
  3. Keysight Technologies Manuals
  4. Test Equipment
  5. Infiniium 90000 Q Series
  6. Service manual
Keysight Technologies Infiniium 90000 Q Series Service Manual

Keysight Technologies Infiniium 90000 Q Series Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
Service Guide
Publication Number 54932-97019
February 2017
© Keysight Technologies 2012-2013, 2017
Infiniium 90000 Q-Series Oscilloscopes

Advertisement

loading
Need help?

Need help?

Do you have a question about the Infiniium 90000 Q Series and is the answer not in the manual?

Questions and answers

Related Manuals for Keysight Technologies Infiniium 90000 Q Series

Summary of Contents for Keysight Technologies Infiniium 90000 Q Series

  • Page 1 Service Guide Publication Number 54932-97019 February 2017 © Keysight Technologies 2012-2013, 2017 Infiniium 90000 Q-Series Oscilloscopes...
  • Page 2 The Keysight Technologies Infiniium 90000 Oscilloscope at a Glance Ease of use with high performance Acquisition and general controls start and stop the oscilloscope and do basic setup The Keysight Technologies Infiniium oscilloscopes combine unprecedented ease-of- • Run and stop controls for continuous or use with high-performance digitizing single acquisitions.
  • Page 3 In This Service Guide This guide provides the service information for the Keysight Technologies 90000 Q-Series oscilloscopes. It is divided into seven chapters. Chapter 1, "General Information," describes which oscilloscope models are covered by this guide, supplied accessories, and where to find the specifications for the 90000 Q-Series oscilloscopes.
  • Page 5 Instruments covered by this service guide 6 Accessories supplied 7 Specifications and Characteristics 7 General Information...
  • Page 6 If you have an oscilloscope that was manufactured after the release of this manual, please check the Keysight Technologies website at www.keysight.com to see whether a newer version of this manual is available. The following 90000 Q-Series oscilloscopes are covered in this guide.
  • Page 7 Chapter 1: General Information Accessories supplied Accessories supplied The following accessories are supplied. • Mouse • Stylus • Keyboard • Front panel cover • Calibration cable (the 50 GHz and 62 GHz bandwidth models include a second calibration cable for the RealEdge inputs) •...
  • Page 8 Chapter 1: General Information Specifications and Characteristics...
  • Page 9 Running a user calibration 13 Calibration...
  • Page 10 Calibration A calibration is simply an oscilloscope self-adjustment. The purpose of a calibration is performance optimization. There are four levels of calibrating an Infiniium Q-Series oscilloscope, with each successive level being a superset of the previous one: • An environmental calibration is a quick fine-tune of response. It includes a minimumset of calibrations and should be run when there are changes to the operating environment around the oscilloscope, such as changes in air flow, temperature, humidity, or the placement of other instruments near the oscilloscope.
  • Page 11 Chapter 2: Calibration Running an Environmental Calibration Running an Environmental Calibration Warm up the oscilloscope for 30 minutes at ambient temperature before starting the calibration procedure. Failure to allow warm up may result in inaccurate calibration. The environmental calibration uses signals generated in the oscilloscope to calibrate response. When to perform an environmental calibration: •...
  • Page 12 Chapter 2: Calibration Running an Environmental Calibration Click Start Quick Env Cal, then follow the instructions on the screen. The routine will prompt you to follow these steps: a Disconnect everything from all inputs and Cal Out. b Connect the calibration cable from Cal Out to channel 1. You must use the 54916-61626 cable (channels 1-4) or 54932-61630 cable (channels 1R and 3R) with two connector saver adapters for all oscilloscopes.
  • Page 13 Chapter 2: Calibration Running a user calibration Running a user calibration Let the Oscilloscope Warm Up Before Adjusting. Warm up the oscilloscope for 30 minutes before starting the calibration procedure. Failure to allow warm up may result in inaccurate calibration. The user calibration uses signals generated in the oscilloscope to calibrate channel sensitivity, offsets, and trigger parameters.
  • Page 14 Chapter 2: Calibration Running a user calibration Figure 2-2 Calibration Dialog Box Clear this check box before starting calibration Click here to start calibration 4 Click Start, then follow the instructions on the screen. The routine will ask you to do the following steps: e Disconnect everything from all inputs and Cal Out.
  • Page 15 Vertical Performance Verification 17 Offset Accuracy Test 18 DC Gain Accuracy Test 25 Analog Bandwidth -- Maximum Frequency Test 30 Time Scale Accuracy (TSA) Test 39 Performance Test Record 41 Full performance verification for Q-Series oscilloscopes consists of three main procedures: Performing the internal oscilloscope self tests to ensure the measurement system is functioning properly.
  • Page 16 However, the oscilloscopes, cables, and accessories that satisfy the critical specifications in these lists may be substituted for the recommended models with some modification to the test procedures. Contact Keysight Technologies for more information about the Keysight products in these lists.
  • Page 17 Chapter 3: Testing Performance Vertical Performance Verification This section contains the following vertical performance verification tests: • Offset Accuracy Test • DC Gain Accuracy Test • Analog Bandwidth -- Maximum Frequency Test • Time Scale Accuracy (TSA) Test...
  • Page 18 Offset Accuracy Test C A U T I O N Ensure that the input voltage to the oscilloscope never exceeds ±5 V. Let the oscilloscope warm up before testing. The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least 30 minutes prior to the start of any performance test.
  • Page 19 Chapter 3: Testing Performance Offset Accuracy Test b When the Acquisition Setup window appears, enable averaging and set the # of averages to 256 as shown below. 3 Configure the scope to measure Average voltage on channel 1 as follows: a Change the vertical scale of channel 1 to 10 mV/div.
  • Page 20 Chapter 3: Testing Performance Offset Accuracy Test c When the Enter Measurement Info window appears, ensure that the V avg function is set up as follows and then click OK: Source = Channel 1 Measurement Area = Entire Display 4 Press [Clear Display] on the scope and wait for the #Avgs value (top right corner of screen) to return to 256.
  • Page 21 Chapter 3: Testing Performance Offset Accuracy Test 6 Repeat step 5 for the remaining vertical sensitivities for channel 1 in the Zero Error Test section of the Performance Test Record. 7 Press [Default Setup], then turn off channel 1 and turn the channel 2 display on. 8 Configure the scope to measure V avg on Channel 2 as follows: a Select Setup >...
  • Page 22 Chapter 3: Testing Performance Offset Accuracy Test Offset Gain Test Procedure Make the connections to scope channel 1 as shown below. Connections Oscilloscope Channel Input Cal Out on Oscilloscope Front Panel Connection Saver Connection Saver BNC (f) to SMA (m) adapter BNC (f) to SMA (m) adapter Notes: •...
  • Page 23 Chapter 3: Testing Performance Offset Accuracy Test Source = Channel 1 Measurement area = Entire Display Set the channel 1 offset value to 400.0 mV. This can be done using the front panel control or: a Pull down the Setup menu and select Channel 1 or click the Channel 1 setup icon. b Change the vertical sensitivity (Scale) of channel 1 to 10 mV/div.
  • Page 24 Chapter 3: Testing Performance Offset Accuracy Test 7 Change the channel 1 offset value to -400.0 mV. 8 Set the Cal Out voltage to -400.0 mV. 9 Press [Clear Display] on the scope, wait for the #Avgs value (top left corner of screen) to return to 256, and then record the DMM voltage reading as V and the scope Vavg reading as V in the Offset...
  • Page 25 Chapter 3: Testing Performance DC Gain Accuracy Test DC Gain Accuracy Test C A U T I O N Ensure that the input voltage to the oscilloscope never exceeds ±5 V. Let the oscilloscope warm up before testing. The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least 30 minutes prior to the start of any performance test.
  • Page 26 Chapter 3: Testing Performance DC Gain Accuracy Test Procedure 1 Make the connections to scope channel 1 as shown below. Connections Oscilloscope Channel Input Cal Out on Oscilloscope Front Panel Connection Saver Connection Saver BNC (f) to SMA (m) adapter BNC (f) to SMA (m) adapter Notes: •...
  • Page 27 Chapter 3: Testing Performance DC Gain Accuracy Test b When the Acquisition Setup window appears, enable averaging and set the # of averages to 256 as shown below. 3 Set the Cal Out voltage (V ) to +30 mV as follows: Cal Out a Select Utilities >...
  • Page 28 Chapter 3: Testing Performance DC Gain Accuracy Test c Select the Vavg measurement as shown below. V avg measurement d When the Enter Measurement Info window appears, ensure that the V avg function is set up as follows and then click OK: Source = Channel 1 Measurement Area = Entire Display 5 Press [Clear Display] on the scope, wait for the #Avgs value (top right corner of screen) to return to...
  • Page 29 Chapter 3: Testing Performance DC Gain Accuracy Test Record the mean reading 6 Change the Cal Out voltage to -30 mV. 7 Press [Clear Display] on the scope, wait for the #Avgs value to return to 256 and then record the DMM voltage reading and the scope V avg reading in the DC Gain Test section of the Performance Test Record.
  • Page 30 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Analog Bandwidth -- Maximum Frequency Test C A U T I O N Ensure that the input voltage to the oscilloscope never exceeds ±5 V. Let the oscilloscope warm up before testing. The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least 30 minutes prior to the start of any performance test.
  • Page 31 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Description Critical Specifications Recommended Model/ Part Numbers Connector Saver 3.5 mm (f)-(f), shipped with 20, 25, and 32 GHz 5061-5311 (used with 20, 25, and oscilloscope models 32 GHz oscilloscope models)
  • Page 32 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Connections for all oscilloscope models, channels 1-4 Microwave CW Generator E8257D Power meter N1912A Oscilloscope Power splitter 11667C Connection saver Power sensor cable 11901A adapter Microwave cable Power sensor 11901C adapter N1922A Notes •...
  • Page 33 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Connections for 50 and 62 GHz oscilloscope models, channels 1R-3R Microwave CW Generator E8257D Power meter N1912A Oscilloscope Power splitter Anritsu V241C Power sensor cable Microwave cable Gore 67 GHz Power sensor N8488A Notes...
  • Page 34 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Memory Depth = Automatic Sampling rate = 160 GSa/s (maximum) Sin(x)/x Interpolation = Auto Averaging = Disabled e Select Measure > Voltage > V rms.
  • Page 35 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test f When the Enter Measurement Info window appears, configure this measurement as follows: Source = Channel 1 Measurement Area = Entire Display RMS Type = AC 7 Set the generator to apply a 50 MHz sine wave with a peak-to-peak amplitude of about 4 divisions. •...
  • Page 36 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test 8 Measure the input power to the scope channel and convert this measurement to Volts RMS using the expression: × 50Ω meas For example, if the power meter reading is 4.0 μW, then Vin = (4.0*10 * 50Ω) = 14.1 mVrms.
  • Page 37 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test 11 Change the generator frequency to the maximum value for the model being tested as shown in the table below. It is not necessary to adjust the signal amplitude at this point in the procedure. Setting Model DSOX/DSAX...
  • Page 38 Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test 16 Change the scope setup as follows: a Change the channel vertical sensitivity to 20 mV/div. b Reset the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform). 17 Change the generator output as follows: a Reset the generator frequency to 50 MHz.
  • Page 39 Chapter 3: Testing Performance Time Scale Accuracy (TSA) Test Time Scale Accuracy (TSA) Test This procedure verifies the maximum TSA specification for the oscilloscope. Equipment Required Equipment Critical Specifications Recommended Model/Part Output Frequency: ≥ 10 MHz Synthesized sine E8257D PSG wave source Output Amplitude: 0 dBm Frequency Resolution: 0.1 Hz...
  • Page 40 Chapter 3: Testing Performance Time Scale Accuracy (TSA) Test Connections Connect the equipment as shown in the following figure. Procedure 1 Configure the sine wave source to output a 0 dBm (600 mVpp) sine wave into 50 ohms with a frequency of 10.00002000 MHz.
  • Page 41 Chapter 3: Testing Performance Performance Test Record Performance Test Record Keysight Technologies Keysight 90000 Q-Series Oscilloscopes Model Number _____________________ Tested by___________________ Serial Number ___________________________ Work Order No.___________________ Recommended Test Interval - 1 Year/2000 hours Date___________________ Recommended next test date ___________________...
  • Page 42 Chapter 3: Testing Performance Performance Test Record Offset Gain Test Vertical Calc. Offset Gain DMM- Scope Scope- Scope Sensitivity Offset Error Test Gain Error Limits Setting Channel 1 10 mV/div ±400 mV ±2 % 20 mV/div ±400 mV ±2 % 50 mV/div ±700 mV ±2 %...
  • Page 43 Chapter 3: Testing Performance Performance Test Record 1 V/div ±2.4 V ±2 %...
  • Page 44 Chapter 3: Testing Performance Performance Test Record DC Gain Accuracy Test Vertical Calc. DC DC Gain Cal Out DMM+ Scope+ Scope- Sensitivity Gain Error Test Setting Error Limits Channel 1 10 mV/div ±30 mV ±2 % 20 mV/div ±60 mV ±2 % 50 mV/div ±150 mV...
  • Page 45 Chapter 3: Testing Performance Performance Test Record 1 V/div ±2.4 V ±2 %...
  • Page 46 Chapter 3: Testing Performance Performance Test Record Analog Bandwidth - Maximum Frequency Check Max frequency: DSOX/DSAX92004Q = 20 GHz, DSOX/DSAX92504Q = 25 GHz, DSOX/DSAX93304Q = 32 GHz, DSOX/DSAX95004Q = 50 GHz, DSOX/DSAX96204Q = 62 GHz . Measurement Vin @ 50 Vout @ 50 Calculated Vin @ Max...
  • Page 47 Chapter 3: Testing Performance Performance Test Record Time Scale Accuracy Measured Time Scale Years Since Low Test Limit (ppm) High Test Limit (ppm) Pass/Fail Error (ppm) Calibration (years) ___________ ___________ ___________ ___________ ___________...
  • Page 48 Chapter 3: Testing Performance Performance Test Record...
  • Page 49 Primary Trouble Isolation 51 Power Supply Troubleshooting 56 Setting Up the BIOS 61 Motherboard Verification 62 Display Troubleshooting 63 Acquisition/Backplane Assembly Troubleshooting 65 Keyboard Troubleshooting 67 LED Troubleshooting 68 Touch Screen Troubleshooting 69 Oscillator Board Troubleshooting 70 Checking Probe Power Outputs 71 Before You Contact Keysight 72 Troubleshooting...
  • Page 50 Troubleshooting The service strategy for troubleshooting oscilloscopes is to isolate problems to a faulty assembly, then use the disassembly and assembly procedures in the "Replacing Assemblies" chapter to replace the defective assembly. Read the Safety Notices at the back of this guide before servicing the oscilloscope. Before performing any procedure, review any cautions and warnings included in the procedures.
  • Page 51 Chapter 4: Troubleshooting Primary Trouble Isolation Primary Trouble Isolation The main procedural tool in this chapter is the flowchart. The Primary Trouble Isolation flowchart in Figure 4-1 shows the entire troubleshooting path from a failed oscilloscope to a working one, and directs you to other sections in this chapter where the procedures are described in detail.
  • Page 52 Chapter 4: Troubleshooting Primary Trouble Isolation Perform power-up. Connect the oscilloscope power cord and press the power button in the lower left corner of the front panel. If the oscilloscope is working properly, it will take several minutes to start up. The LEDs on the front panel should all illuminate brightly for several seconds, then dim.
  • Page 53 Chapter 4: Troubleshooting Primary Trouble Isolation 1 Select Self Test from the Utilities menu. 2 Select Keyboard Test from the Self Test drop-down list box, then click Start Test. The Front Panel Keyboard Test window appears with a symbolic representation of the keyboard. See Figure 4-3.
  • Page 54 Chapter 4: Troubleshooting Primary Trouble Isolation Figure 4-4 LED test screen 3 Repeatedly press the [Single] button on the front panel to step through and highlight each LED symbol in the test screen. You can also step through the LEDs by pressing the << Prev or Next >>...
  • Page 55 Chapter 4: Troubleshooting Primary Trouble Isolation boards associated with the RealEdge Technology. • If replacing the two acquisition boards does not fix the problem with the RealEdge Technology channels, replace the RealEdge Technology attenuators and modules. • If the failure is associated with channel 1, look at the specific calibration that failed. If it was a trigger cal, a time scale cal, or an interpolator gain cal, replace the backplane board because it is likely the problem.
  • Page 56 Chapter 4: Troubleshooting Power Supply Troubleshooting Power Supply Troubleshooting This section provides information to help you isolate the problem to the assembly level when the power system is not operating properly. There are two sets of LEDs on the backplane assembly. Seeing which of these LEDs are illuminated will help you identify the reason and the remedy for the power failure.
  • Page 57 Chapter 4: Troubleshooting Power Supply Troubleshooting Type of Fault What To Do PS01 PS02 PS03 PS04 Supply late Supply late Supply late Supply late Under-voltage Under-voltage Replace Backplane Assembly Under-voltage Under-voltage Over-voltage Over-voltage Over-voltage Over-voltage Power button pushed at wrong time Unplug scope, wait 30 seconds, plug in, power up PS11...
  • Page 58 Chapter 4: Troubleshooting Power Supply Troubleshooting Type of Fault What To Do PS71 PS72 PS73 PS74 Supply late Supply late Supply late Supply late Under-voltage Under-voltage Replace Backplane Assembly Under-voltage Under-voltage Over-voltage Over-voltage Over-voltage Over-voltage Power button pushed at wrong time Unplug scope, wait 30 seconds, plug in, power up The second set of LEDs is located to the left of the first set and slightly lower, below the J12002 connector...
  • Page 59 Chapter 4: Troubleshooting Power Supply Troubleshooting Type of Fault What To Do AOT0* Over-temperature Replace acquisition assembly 4 AOT1* Over-temperature Replace acquisition assembly 4 AOT2* Over-temperature Replace acquisition assembly 3 AOT3* Over-temperature Replace acquisition assembly 3 AOT4* Over-temperature Replace acquisition assembly 2 AOT5* Over-temperature Replace backplane assembly 2...
  • Page 60 Chapter 4: Troubleshooting Power Supply Troubleshooting Type of Fault What To Do *If an AOT LED is Lit If the oscilloscope shuts down and the AOT0, AOT1, AOT2, AOT3, AOT4, AOT5, AOT6, or AOT7 indicator LED is lit, then one of the scope channels is getting too hot or the temperature sensing circuitry has failed.
  • Page 61 Chapter 4: Troubleshooting Setting Up the BIOS Setting Up the BIOS If the BIOS settings become corrupt, the Infiniium oscilloscope PC motherboard will not recognize the hard drive and the oscilloscope may not start. To configure the motherboard BIOS parameters to the default settings, follow these steps: 1 Connect the power cable to the oscilloscope.
  • Page 62 Chapter 4: Troubleshooting Motherboard Verification Motherboard Verification If you have been through the Power Supply Troubleshooting section of this chapter and the oscilloscope still does not stay powered up, the problem may be with the motherboard. To diagnose this problem, follow these steps.
  • Page 63 Chapter 4: Troubleshooting Display Troubleshooting Display Troubleshooting Figure 4-8 Display Troubleshooting Flowchart Connect external monitor to VGA port. Turn on power. Does display Replace appear on ext. motherboard monitor? Check display cable Is front panel connection to display monitor scrambled? Is front panel Still scrambled? display black?
  • Page 64 Chapter 4: Troubleshooting Display Troubleshooting W A R N I N G INJURY CAN RESULT! Use caution when the oscilloscope fan blades are exposed as they can cause injury. Disconnect the power cable before working around the fans. Use extreme caution in working with the oscilloscope when the cover is removed.
  • Page 65 Chapter 4: Troubleshooting Acquisition/Backplane Assembly Troubleshooting Acquisition/Backplane Assembly Troubleshooting This section describes which board assembly to replace if any of the scope self tests fail. When the self- test error message file is generated it is sent to the following location: C:\ProgramData\Keysight\Infiniium\selftest\SelfTestLog.txt The error message usually indicates the channel with the error.
  • Page 66 Chapter 4: Troubleshooting Acquisition/Backplane Assembly Troubleshooting Test Group and Test Error Type Assembly to Replace Name Merwig6, Merwig7, Hedwig12, Hedwig13, Replace acquisition assembly 4. Hedwig14, Hedwig15, Oak6 If error still occurs, put original acquisition assembly back into scope and replace backplane assembly.
  • Page 67 Chapter 4: Troubleshooting Keyboard Troubleshooting Keyboard Troubleshooting If some of the knobs fail the keyboard self test but some work properly, replace the rear board of the keyboard assembly. If none of the knobs work properly, replace the front board of the keyboard assembly. If any of the keys do not work properly but the LEDs light up, replace the front board of the keyboard assembly.
  • Page 68 Chapter 4: Troubleshooting LED Troubleshooting LED Troubleshooting LED Failure During System Start-Up When power is turned on to the scope, the front panel LEDs should all illuminate brightly for several seconds, then dim. The RealEdge LED (on 50 and 62 GHz models) should pulse off and on. When the Infiniium software starts up, the LEDs should turn off.
  • Page 69 Chapter 4: Troubleshooting Touch Screen Troubleshooting Touch Screen Troubleshooting Figure 4-9 Touch screen flowchart Does the touch Done screen work? Is the Touch Is the driver Calibrate the touch button lit? installed? screen Turn on Touch Test USB port with Do cal tests Replace touch button...
  • Page 70 Chapter 4: Troubleshooting Oscillator Board Troubleshooting Oscillator Board Troubleshooting If you encounter any problems with the oscillator board, first check all cabling and connections to ensure they are secure and tight: • Check the connection between the oscillator board and the backplane board. •...
  • Page 71 Chapter 4: Troubleshooting Checking Probe Power Outputs Checking Probe Power Outputs Probe power outputs are on the front panel, in the lower left corner of the 3.5mm inputs. Refer to Figure to check the power output at the connectors. Measure the voltages with respect to the ground terminal on the front panel, located near Aux Out.
  • Page 72 If you have read this Troubleshooting chapter and have unresolved questions about troubleshooting the oscilloscope, be ready to provide system information such as the current software version and installed options. This information will be useful when you contact Keysight Technologies. To find and save system information, follow these steps: 1 Select Help >...
  • Page 73 ESD Precautions 74 Tools Required 74 Returning the Oscilloscope to Keysight Technologies for Service 75 Removing and Replacing the Top Panel and Motherboard 76 Removing and Replacing the Hard Disk Drive 81 Removing and Replacing the Power Supply 82 Removing and Replacing the Front Panel Assembly and Bottom Panel 83...
  • Page 74 Replacing Assemblies Use the procedures in this chapter when removing and replacing assemblies and parts in the Keysight Technologies oscilloscopes. In general, the procedures that follow are placed in the order to be used to remove a particular assembly. The procedures listed first are for assemblies that must be removed first. The graphics in this chapter are representative of the oscilloscope at the time of this printing.
  • Page 75 Pack the oscilloscope in foam or other shock-absorbing material and place it in a strong shipping container. You can use the original shipping materials or order materials from an Keysight Technologies Sales Office. If neither is available, place 16 to 20 cm (6 to 8 inches) of shock-absorbing material around the oscilloscope and place it in a box that does not allow movement during shipping.
  • Page 76 Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Removing and Replacing the Top Panel and Motherboard Note that all sheet metal holes that are supposed to have screws placed in them are marked by lines on four sides of the hole. Remove the four M3 screws that connect the top panel to the rear.
  • Page 77 Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Disconnect the PCIe cable by pressing down on the locking tab and pulling the cable. Figure 5-4 Disconnect the red SATA cable. Figure 5-5 Disconnect the display cable (left circle in photo) and the standby switch cable (right circle, next to the SATA cable).
  • Page 78 Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Disconnect the two USB cables. Figure 5-7 Disconnect the power cable from the four locations shown in the next three figures. Figure 5-8 Figure 5-9...
  • Page 79 Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Figure 5-10 If you need to replace the motherboard fan, disconnect the cable from the fan to the motherboard now. Otherwise, you do not need to disconnect it. Figure 5-11 Disconnect the USB controller cable.
  • Page 80 Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Remove the PCIe cable from the motherboard and set it aside to put on the new motherboard. Remove the six M3 screws from the motherboard. When replacing, torque the screws to 5 in- lbs.
  • Page 81 Chapter 5: Replacing Assemblies Removing and Replacing the Hard Disk Drive Removing and Replacing the Hard Disk Drive Loosen the two screws on back of the hard disk drive. Figure 5-15 Pull the hard drive out. Figure 5-16 Remove the four screws connecting the disk drive to the bottom of the plate. To replace the hard disk drive, reverse this procedure.
  • Page 82 Chapter 5: Replacing Assemblies Removing and Replacing the Power Supply Removing and Replacing the Power Supply SHOCK HAZARD! W A R N I N G If the power supply is defective it could have a dangerous charge on some capacitors. This charge could remain for many days after removing power from the supply.
  • Page 83 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Removing and Replacing the Front Panel Assembly and Bottom Panel Remove the top panel as described previously. Disconnect the two USB cables and the display and standby switch cables as described previously. Unsnap the locking clip to remove the USB cable.
  • Page 84 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Figure 5-20 Remove the five M3 screws from the bottom panel. Figure 5-21 Remove the bottom panel. Disconnect each input cable from each of the four attenuator connectors using a 5/16-inch Hex torque wrench.
  • Page 85 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Figure 5-22 Disconnect the attenuator power cable from each input channel attenuator. Figure 5-23 Disconnect the Probe Comp cable from the connector on the backplane board. Figure 5-24 Disconnect the Aux Out and Cal Out cables from both the front panel and the backplane board.
  • Page 86 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Figure 5-25 Figure 5-26 The front panel is now disconnected. Removing a RealEdge Assembly If you are working on a 50 or 62 GHz model, it will have a RealEdge assembly. The following steps show how to remove it.
  • Page 87 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Figure 5-28 Disconnect the RealEdge assembly power cables. Figure 5-29 Remove the four M3 screws. Figure 5-30 Gently remove the RealEdge assembly, keeping the cables from getting caught. Gently slide it toward the back, careful to avoid catching any parts on the sheet metal flange on the chassis.
  • Page 88 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Figure 5-31 Flip the RealEdge assembly over and disconnect the remaining cables: two input cables, two attenuator cables, and the two cables coming from the 32 GHz DRO. You do not need to disconnect the cables from the DRO itself.
  • Page 89 Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel the front panel to the bottom of the chassis. When replacing, torque the screws to 5 in-lbs. Figure 5-33 Pull off the front panel, carefully feeding the USB cable through the opening. To replace the front panel assembly, reverse this procedure.
  • Page 90 Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts Removing and Replacing Front Panel Assembly Parts Remove the front panel assembly as described in the previous section. Front Panel Clutches, Connectors, and Knobs W A R N I N G This step will ruin the clutch.
  • Page 91 Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts Remove the six screws from the back of the front panel. Figure 5-36 If the oscilloscope is a 20, 25, or 32 GHz model, it will have a filler plate covering Trig Out and Aux Trig.
  • Page 92 Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts The front circuit board of the keyboard assembly is connected to the front bezel. If you need to remove and replace only this front board, push the snap tabs out of way with a screwdriver and pull out the board.
  • Page 93 Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts Cal Connector (Power Button) Assembly Remove the two screws connecting the cal bracket to the front deck. When replacing, use a power driver and T-10 bit to torque the screws to 8 in-lbs. Figure 5-41 Remove the cal connector assembly from the front panel deck.
  • Page 94 Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts Remove the four M3 screws (two on each side) connecting the display to the deck. When reinstalling, torque to 5 in-lbs. Figure 5-44 Attenuators (20, 25, and 33 GHz Models) Remove the four screws connecting each attenuator to its bracket.
  • Page 95 Chapter 5: Replacing Assemblies Removing and Replacing RealEdge Components Removing and Replacing RealEdge Components This section describes how to remove and replace the RealEdge modules and the attenuator components of the RealEdge assembly. Remove the RealEdge assembly as described previously. Remove the two screws from the back of the top RealEdge module as shown below.
  • Page 96 Chapter 5: Replacing Assemblies Removing and Replacing RealEdge Components Carefully remove the RealEdge module. Figure 5-48 Remove the two screws on the side of the attenuator. When replacing, torque to 5 in-lbs. Figure 5-49 Loosen the SMA connector from the male SMA connector on the 1.85 connector. When replacing, torque the connector to 8 in-lbs.
  • Page 97 Chapter 5: Replacing Assemblies Removing and Replacing RealEdge Components Remove the two screws connecting the attenuator to the bracket. When replacing, hand tighten the screws and then back off the screw one full turn to allow the frame to move. Tighten the screws after the connector is tightened.
  • Page 98 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Removing and Replacing the Acquisition Boards/Backplane Assembly Use these procedures to remove and replace the acquisition and backplane assemblies and individual acquisition boards. When necessary, refer to other removal procedures. The graphics in this chapter are representative of the oscilloscope at the time of this printing.
  • Page 99 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly for 50 GHz and 62 GHz models), using 5/8 (left photo) and 5/16 (right photo) drivers. When reconnecting, torque the nut and washers to 18 in-lbs. Figure 5-54 If you need to replace the oscillator board, remove the four M3 screws connecting the board to its tray and disconnect all attached cables.
  • Page 100 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Figure 5-57 Dress all cables into the center to keep them from getting caught. Lift the entire backplane board/acquisition assembly out of the chassis and place it on another table.
  • Page 101 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly to the oscillator board and it has the longest cable. Acquisition board 4 has the shortest cable. You may want to label the acquisition boards 1 through 4 for easy reference. Carefully remove the five clock cables from the DRO to the acquisition boards using a 5/16 Torx wrench.
  • Page 102 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Figure 5-61 Lift off the rear panel. Remove the two screws (one on each side) connecting the oscillator board tray to the backplane deck, unless you are replacing only acquisition board 4. Figure 5-62 To remove only board 4, disconnect the 54932-61624 cable and the attenuator cable connection from board 4 only.
  • Page 103 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Figure 5-63 Gently rock the acquisition board and guide the input cables through. Remove the acquisition board and place it upside-down in an anti-static bag to avoid crimping the cables. Repeat steps 7-8 for any additional acquisition boards to be removed, if applicable.
  • Page 104 Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Figure 5-65 Using a T10 Torx, remove the 10 tie-down screws from the edges. When replacing, torque the screws to 5 in-lbs. Figure 5-66 Lift the backplane assembly off the deck.
  • Page 105 Chapter 5: Replacing Assemblies Setting the Calibration Factors after Replacing an Acquisition Board Setting the Calibration Factors after Replacing an Acquisition Board You must perform a user calibration and self test procedure after replacing an acquisition board. Refer to the calibration chapter in this Service Guide for details. Let the oscilloscope warm up before testing.
  • Page 106 Chapter 5: Replacing Assemblies Removing and Replacing the Fans Removing and Replacing the Fans W A R N I N G AVOID INJURY! The fan blades are exposed both inside and outside the chassis. Disconnect the power cable before working around the fan. Use extreme caution in working with the oscilloscope. Failure to observe these precautions may result in injury.
  • Page 107 Chapter 5: Replacing Assemblies Removing and Replacing the Fans Clip off the end of each of the fan mounts (see Figure 5-69) and take the fan out. Repeat for each fan that needs to be replaced. Figure 5-69 C A U T I O N AVOID OVERHEATING THE OSCILLOSCOPE When replacing the fan, be sure the direction of the fan air flow is coming from the inside to the outside of the oscilloscope.
  • Page 108 Chapter 5: Replacing Assemblies Removing and Replacing the USB Controller Cable Removing and Replacing the USB Controller Cable Remove the top panel. Remove the two self-tapping screws from the top edge of chassis. When replacing, torque the screws to 3 in-lbs. Figure 5-70 Disconnect both ends of the cable.
  • Page 109 Chapter 5: Replacing Assemblies Removing and Replacing the USB Controller Cable Pull the connector cable out of the oscilloscope. Figure 5-72 To replace the USB controller cable, reverse the procedure. Be careful not to overtighten the screws.
  • Page 110 Chapter 5: Replacing Assemblies Removing and Replacing the USB Controller Cable...
  • Page 111 Ordering Replaceable Parts 112 Listed Parts 112 Unlisted Parts 112 Direct Mail Order System 112 Exchange Assemblies 112 Exploded Views 113 Replaceable Parts List 118 Replaceable Parts...
  • Page 112 Service support for this oscilloscope is replacement of parts to the assembly level. 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 113 Chapter 6: Replaceable Parts Exploded Views Exploded Views Front Panel...
  • Page 114 Chapter 6: Replaceable Parts Exploded Views Fan and Acquisition Assembly...
  • Page 115 Chapter 6: Replaceable Parts Exploded Views Oscillator Assembly...
  • Page 116 Chapter 6: Replaceable Parts Exploded Views Power Supply and PC Motherboard...
  • Page 117 Chapter 6: Replaceable Parts Exploded Views External...
  • Page 118 The following table is a list of replaceable parts. The information given for each part consists of the following: • Reference designation. • Keysight Technologies part number. • Total quantity (QTY) in oscilloscope or on assembly. The total quantity is given once and at the first appearance of the part number in the list.
  • Page 119 Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Keysight Des. Part Description Number 54916-07101 Input Connector Ground Spring 54932-47403 Knob 12 mm slate blue 54932-47404 Knob 12 mm slate red 54932-47405 Knob 12 mm slate plain 54932-47410 Knob 18 mm slate yellow 54932-47411 Knob 12 mm slate yellow 54932-47420...
  • Page 120 Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Keysight Des. Part Description Number 54913-94317 Label - RHDD 54904-01201 Bracket RHDD 54904-41202 Clamp SATA 54904-41203 Support assembly board 54904-45202 Housing PCIe cable snap 54904-45203 Housing PCIe cable receptacle 54916-41002 Foot - Tilt Lever 54916-41001 Foot - Tilt Base...
  • Page 121 Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Keysight Des. Part Description Number 54904-61614 Cable - Hard disk power 54904-94317 Label, RHDD tray 54916-68717 Connector Assembly - 3.5mm female to female - kit of 5 54932-61602 Cable - Jewel LO 54932-61603 Cable - Jewel Pilot 54932-61605...
  • Page 122 Chapter 6: Replaceable Parts Replaceable Parts List...
  • Page 123 Motherboard Assembly 126 Acquisition Assembly 127 Backplane Assembly 129 Oscillator Assembly 133 Front Panel Assembly 134 RealEdge Technology Assembly 135 Power Supply 136 Theory of Operation...
  • Page 124 Chapter 7: Theory of Operation Figure 7-1 Oscilloscope block diagram...
  • Page 125 Theory of Operation This chapter describes the basic structure of the oscilloscope and how the parts interact. The 90000 Q-Series oscilloscopes are comprised of five or six main assemblies, depending on the model of the oscilloscope: a motherboard assembly, an acquisition assembly, a backplane assembly, an oscillator assembly, and a front panel assembly for all models, plus a RealEdge Technology Assembly for 50 GHz and 62 GHz bandwidth models.
  • Page 126 Chapter 7: Theory of Operation Motherboard Assembly Motherboard Assembly The motherboard assembly provides all system control and interface functions for the oscilloscope. The motherboard contains a microprocessor, a hard disk drive interface, ROM, RAM, keyboard and mouse interfaces, connections to the front panel assembly, and serial and parallel interfaces. Pressing the on/off button sends a signal to the motherboard.
  • Page 127 Chapter 7: Theory of Operation Acquisition Assembly Acquisition Assembly The acquisition assembly consists of four identical acquisition boards. These four boards connect to the backplane board as shown in Figure 7-3. Figure 7-3 Acquisition Assembly channel 4 channel 3 channel 2 channel 1 The bottom acquisition board circuitry samples, digitizes, and stores the signals for channel 1.
  • Page 128 Chapter 7: Theory of Operation Acquisition Assembly Figure 7-4 Oak Module and Acquisition Components To Trigger (on backplane) Power and Control Memory Trigger Attenuator Coax Preamp Memory Sampler RealEdge Preamp Technology Trigger Memory Oak Module To Trigger (on backplane) Memory Coax Differential Signal...
  • Page 129 Chapter 7: Theory of Operation Backplane Assembly Backplane Assembly The backplane assembly is a device on the PCI Express (PCIe) bus connected by a PCI Express cable to the motherboard. The backplane assembly receives +12 V DC power through a power interface board from the bulk supply, and all voltages are derived from switching power regulators and other circuitry.
  • Page 130 Chapter 7: Theory of Operation Backplane Assembly hardware to the PC system. All system controls and data pass through the main FPGA. Figure 7-6 shows the connections to the main FPGA Figure 7-6 Main Communication FPGA Connections. Config Memory Memory PROM Controller Controller...
  • Page 131 Chapter 7: Theory of Operation Backplane Assembly Figure 7-7 Timebase Timebase PS Filter Memory Controller Preamp/ 10 GHz clock from Timebase Sampler/ generator Trigger Hybrid Trig[3:2] PS Filter Memory Controller Preamp/ 10 GHz clock from Sampler/ Timebase Trigger generator Hybrid Master Trig[1:0] 10 GHz clock from...
  • Page 132 Chapter 7: Theory of Operation Backplane Assembly differential signal using a bandpass filtered 180° phase splitter implemented using microwave structures on shielded inner layers of the PCB. The clock distribution system divides this clock and distributes phase-aligned lower speed clocks to the acquisition boards. The timebase IC divides the 10 GHz CW clock down into multiple 1 GHz and 250 MHz clocks.
  • Page 133 Chapter 7: Theory of Operation Oscillator Assembly Oscillator Assembly The oscillator assembly consists of an oscillator board; one or two DROs (dielectric resonator oscillators), depending on the oscilloscope’s model; two SMA connectors for the 100 MHz clock; two BNC connectors for the 10 MHz clock; and a connector to the backplane board. The timebase distribution system described in the previous section is driven by a precision low-jitter 10 GHz clock generation system.
  • Page 134 Chapter 7: Theory of Operation Front Panel Assembly Front Panel Assembly The front panel assembly consists of an LCD display board with backlight; a touch screen and touch controller; an on/off board; and a keyboard assembly, which is two boards that sit with one behind the other, connected with a pair of 60-pin board-to-board connectors.
  • Page 135 Chapter 7: Theory of Operation RealEdge Technology Assembly RealEdge Technology Assembly The RealEdge Technology assembly is included with Q-Series oscilloscope models of 50 GHz and 62 GHz (DSOX/DSAX95004Q and DSOX/DSAX96204Q). The RealEdge Technology assembly consists of a connector, a 67 GHz attenuator, three RealEdge Technology microcircuits, and a 32 GHz DRO. This Service Guide does not describe the RealEdge Technology assembly in any detail, as the technology is Keysight proprietary.
  • Page 136 Chapter 7: Theory of Operation Power Supply Power Supply The power supply is a +12 V bulk supply that is removable, exchangeable, and safety-approved. It transforms AC power to the main +12 V 100A supply and a small +5 V supply. The +5 V supply is standby power and is always on whenever AC power is applied.
  • Page 137 • Do not install substitute parts or perform any unauthorized Keysight Technologies P.O. Box 2197 1900 Garden of the Gods Road Colorado Springs, CO 80901...
  • Page 138 Notices Document Warranty WARNING The material contained in A WARNING notice this document is provided © Keysight Technologies, Inc. denotes a hazard. It calls “as is,” and is subject to 2012-2013, 2017 attention to an operating being changed, without procedure, practice, or notice, in future editions.