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Troubleshooting

Infiniium V-Series Oscilloscopes Service Guide

Hardware Serial Trigger Assembly Troubleshooting

This section describes problems that may occur when an optional hardware serial

trigger assembly is installed, and how to troubleshoot them.
If a signal appears on screen but the eye scan diagram consists of only a solid blue

box, check the semi-rigid cable connections from the acquisition boards to the

serial trigger assembly. Make sure the cables are seated securely.

Summary of Contents for Infiniium MSOV 084A

Page 1: ...Keysight Infiniium V Series Oscilloscopes Service Guide...

Page 2: ...vides the Software to U S gov ernment customers under its standard com mercial license which is embodied in its End User License Agreement EULA a copy of which can be found at http www keysight com fi...

Page 3: ...iderations 13 2 Calibration 15 What is a Calibration 16 Running an Environmental Calibration 17 Equipment Required 17 Procedure 17 Running a User Calibration 19 Equipment Required 19 Procedure 20 3 Te...

Page 4: ...cquisition Backplane Assembly Troubleshooting 76 Keyboard Troubleshooting 77 Front Panel LED Troubleshooting 78 Touch Screen Troubleshooting 79 Checking Probe Power Outputs 80 MSO Assembly Troubleshoo...

Page 5: ...e power supply 128 Removing and replacing fans 129 Removing and replacing the optional GPIB port 131 6 Replaceable Parts 133 Ordering Replaceable Parts 134 Exploded Views 135 Replaceable Parts List 13...

Page 6: ...6 Infiniium V Series Oscilloscopes Service Guide...

Page 7: ...pes Service Guide 1 General Information Instruments Covered by this Service Guide 8 Accessories Supplied 8 Specifications and Characteristics 9 Measurement Category 11 Preventing Damage to the Oscillo...

Page 8: ...of this manual is available The following V Series oscilloscopes are covered in this guide The oscilloscope model can be identified by the product number on the front or rear panel Accessories Suppli...

Page 9: ...Humidity Operating up to 95 relative humidity non condensing at 40 C Non operating up to 90 relative humidity at 65 C Altitude Operating up to 4 000 meters 12 000 feet Non operating up to 15 300 meter...

Page 10: ...A clean room or climate controlled office environment Pollution Degree 2 Normally only dry non conductive pollution occurs Occasionally a temporary conductivity caused by condensation may occur Exampl...

Page 11: ...circuits directly connected to the low voltage installation Examples are measurements on household appliances portable tools and similar equipment Measurement category III is for measurements performe...

Page 12: ...oscilloscope s channel input circuits can be damaged by ESD Avoid applying static discharges to anything connected to the oscilloscope Be sure the oscilloscope is properly earth grounded to prevent bu...

Page 13: ...outlets 100 VAC Do not use a 3 prong to 2 prong adapter Do not have loose outlet connections CAUTION Do not use this instrument with a power cord other than the one provided by Keysight The power cor...

Page 14: ...14 Infiniium V Series Oscilloscopes Service Guide 1 General Information...

Page 15: ...15 Keysight Infiniium V Series Oscilloscopes Service Guide 2 Calibration What is a Calibration 16 Running an Environmental Calibration 17 Running a User Calibration 19...

Page 16: ...It includes the environmental cal With a user calibration you may optionally choose to run time scale calibrations and interleave correction calibrations These cals do not run by default and they req...

Page 17: ...ired Procedure 1 Let the oscilloscope warm up before running the environmental calibration The environmental calibration should be done only after the oscilloscope has run for 30 minutes at ambient te...

Page 18: ...4916 61626 cable assembly with two connector saver adapters Failure to use the appropriate calibration cable will result in an inaccurate calibration c Connect the calibration cable from Cal Out to ea...

Page 19: ...response correction portion when running the user calibration Performing a user calibration will invalidate the oscilloscope s Certificate of Calibration If NIST National Institute of Standards and Te...

Page 20: ...ndicate whether you want to run time scale and interleave response correction calibrations For a list of equipment required to perform the time scale calibration refer to the Time Scale Accuracy TSA T...

Page 21: ...ion fails click the Enable Details box for information on the failures Also check the calibration cables 5 If you are calibrating an MSO model oscilloscope follow the prompts to connect the digital ch...

Page 22: ...22 Infiniium V Series Oscilloscopes Service Guide 2 Calibration...

Page 23: ...erforming the internal oscilloscope self tests to ensure the measurement system is functioning properly To perform the self tests Click Utilities Self Test Then select Scope SelfTest from the Availabl...

Page 24: ...er However it is recommended to conduct the tests in the order presented as it represents an incremental approach to performance verification This approach may be useful if you are trying to troublesh...

Page 25: ...oscopes Service Guide 25 Vertical Performance Verification This section describes the following vertical performance verification tests Offset Accuracy Test DC Gain Accuracy Test Analog Bandwidth Maxi...

Page 26: ...v 20 mV div 50 mV div 100 mV div 200 mV div 500 mV div and 1 V div Equipment Critical specifications Recommended model part Digital Multimeter DC voltage measurement accuracy better than 0 1 of readin...

Page 27: ...3 Click Setup Acquisition In the Acquisition dialog box enable averaging and set of Averages to 256 4 Configure the oscilloscope to measure the average voltage V avg on channel 1 as follows a Change...

Page 28: ...the Performance Test Record Average measurement V avg NOTE For all oscilloscope readings in this procedure use the mean value in the Measurement Results area at the bottom of the screen If a question...

Page 29: ...n 9 Configure the oscilloscope to measure the average voltage on channel 2 as follows a Click Setup Acquisition In the Acquisition dialog box enable averaging and set of Averages to 256 b Change the v...

Page 30: ...it directly to the oscilloscope channel input using the BNC f to SMA m adapter and the connector savers to minimize ground potential differences and to ensure that the DMM measures the input voltage...

Page 31: ...urn to 256 and then record the DMM voltage reading as VDMM and the scope V avg reading as VScope in the Offset Accuracy Offset Gain Test section of the Performance Test Record 7 Change the offset valu...

Page 32: ...he channel under test Record the results in the Offset Accuracy Offset Gain Test section of the Performance Test Record For each measurement set both the Cal Out voltage VCal Out and the Channel offse...

Page 33: ...V div Below 7 5 mV div full scale is defined as 60 mV The major scale settings are 1 mV div 2 mV div 5 mV div 10 mV div 20 mV div 50 mV div 100 mV div 200 mV div 500 mV div and 1 V div Equipment Requi...

Page 34: ...voltage to the oscilloscope channel as accurately as possible Differences in ground potential can be a significant source of measurement error particularly at high scope sensitivities It also helps to...

Page 35: ...nnel 1 waveform 6 Press Clear Display on the oscilloscope wait for the number of averages to return to 256 and then record the DMM voltage reading as VDMM and the scope V avg reading as VScope in the...

Page 36: ...or vertical scale values 1 V use the following equation For vertical scale values 1 V use the following equation 10 Repeat steps 3 to 9 for the remaining channel 1 vertical scale settings in the DC Ga...

Page 37: ...t Required Description Critical specifications Recommended model part Microwave CW Generator Maximum Frequency 32 GHz Power range 20 dBm to 16 dBm into 50 Output resistance 50 E8257D with Opt 540 Powe...

Page 38: ...to the scope channel N input directly using the 11901A adapter and a connector saver without any additional cabling or adapters Connect the power sensor directly to output 2 of the power splitter usi...

Page 39: ...div c Set the horizontal scale to 16 ns div to display 8 cycles of a 50 MHz waveform d Click Setup Acquisition and make sure the acquisition parameters are set up as follows Memory Depth Automatic Sam...

Page 40: ...rement to Volts RMS using the expression For example if the power meter reading is 4 0 W then Vin 4 0 10 6 50 1 2 14 1 mVrms Record the RMS voltage in the Analog Bandwidth Maximum Frequency Check sect...

Page 41: ...ement to Volts RMS using the expression For example if the power meter reading is 4 0 W then Vin 4 0 10 6 50 1 2 14 1 mVrms Record the RMS voltage in the Analog Bandwidth Maximum Frequency Check secti...

Page 42: ...e reference gain at 50 MHz for this scale setting 19 Repeat steps 11 through 14 to measure the gain at maximum frequency for this scale setting 20 Repeat steps 15 through 19 to complete measuring gain...

Page 43: ...ce the Entire Display as the Measurement Area and AC for the RMS Type 24 Repeat steps 7 to 20 to complete measuring gains for channel 3 25 Move the splitter to channel 4 and change the oscilloscope co...

Page 44: ...libration whether performed at the factory by a customer or by a Keysight service center The aging component scales linearly from the time since the last time base calibration and adds to the initial...

Page 45: ...orizontal scale to 20 ms div 7 Set the measurement thresholds for all waveforms to a fixed voltage level of 0 V and 20 mV hysteresis a Click Measure Thresholds b Select Custom level hysteresis from th...

Page 46: ...bration in years in the table The calibration date can be found in the Calibration window Utilities Calibration 14 Calculate the test limits using the following formula and record them in the table Te...

Page 47: ...r No ___________________ Recommended Test Interval 1 Year 2000 hours Date_____________________________ Recommended next test date ___________________ Ambient temperature ______________ Offset Accuracy...

Page 48: ...100 mV div 1 2 V 2 200 mV div 2 2 V 2 500 mV div 2 4 V 2 1 V div 2 4 V 2 Channel 2 10 mV div 400 mV 2 20 mV div 400 mV 2 50 mV div 700 mV 2 100 mV div 1 2 V 2 200 mV div 2 2 V 2 500 mV div 2 4 V 2 1...

Page 49: ...2 200 mV div 600 mV 2 500 mV div 1 5 V 2 1 V div 2 4 V 2 Channel 2 10 mV div 30 mV 2 20 mV div 60 mV 2 50 mV div 150 mV 2 100 mV div 300 mV 2 200 mV div 600 mV 2 500 mV div 1 5 V 2 1 V div 2 4 V 2 Ch...

Page 50: ...ical Scale Measurement Vin 50 MHz Vout 50 MHz Calculated Gain 50 MHz Vin Max Freq Vout Max Freq Calculated Gain Max Freq Test Limit greater than 3 dB Channel 1 10 mV div 20 mV div 50 mV div 100 mV div...

Page 51: ...m V Series Oscilloscopes Service Guide 51 Time Scale Accuracy Measured Time Scale Error ppm Years Since Calibration years Low Test Limit ppm High Test Limit ppm Pass Fail ___________ ___________ _____...

Page 52: ...52 Infiniium V Series Oscilloscopes Service Guide 3 Testing Performance...

Page 53: ...g Up the BIOS 72 Motherboard Verification 73 Display Troubleshooting 75 Acquisition Backplane Assembly Troubleshooting 76 Keyboard Troubleshooting 77 Front Panel LED Troubleshooting 78 Touch Screen Tr...

Page 54: ...fault setup to undo previous setups so they do not interfere with the current measurement Use the default setup when a procedure requires it by pressing Default Setup on the front panel WARNING INJURY...

Page 55: ...Chapter 6 Replaceable Parts List The power cord provided is matched to the country of origin 2 Press the power button in the lower left corner of the front panel If the oscilloscope is working properl...

Page 56: ...annels 1 and 2 is faulty and requires replacement MEMCON5 MEMCON6 MEMCON7 and MEMCON8 errors indicate the upper acquisition board channels 3 and 4 is faulty and requires replacement Run the oscillosco...

Page 57: ...rrow under the corresponding knob symbol should turn green When you turn the knob in the other direction the entire rotation arrow under the knob symbol should turn green 5 When you are finished click...

Page 58: ...Purpose button on the front panel illuminates all the LEDs and pressing the Clear Display button on the front panel turns off all the LEDs 4 When you are finished click Close If any of the LEDs do not...

Page 59: ...the failure is associated with channel 1 but is not a trigger cal a time scale cal or an interpolator gain cal replace the bottom acquisition board If the cal still fails replace the backplane board I...

Page 60: ...u likely have an over temperature fault If the oscilloscope never powers up or flickers then shuts off immediately you likely have an over voltage fault or a defective bulk 12 V power supply There are...

Page 61: ...lane assembly see the following two figures Six of the LEDs indicate an under voltage fault and four indicate an over temperature fault Another LED in this group is BULK SUPPLY FAIL located below NEG...

Page 62: ...Ds indicate over voltage faults One group is located near the center of the top edge of the backplane assembly just above the blue and red SATA cables see the two figures below Over voltage indicator...

Page 63: ...lloscope nearest the rear panel see the following figures Over voltage indicator LEDs on acquisition assembly behind fan Over voltage indicator LEDs with fan removed The acquisition assembly nearest t...

Page 64: ...place backplane assembly NEG SUPPLY FAIL Under voltage Replace backplane assembly U ACQ TEMP FAIL Over temperature Go to If the L ACQ TEMP FAIL or U ACQ TEMP FAIL LED is lit MAIN FAN FAIL Over tempera...

Page 65: ...fans and the trigger ICs are working but the oscilloscope still shuts down because of temperature due to one or more of the channels malfunctioning and drawing too much current If so you would need t...

Page 66: ...fault goes away with the front panel power reconnected to the backplane assembly If the oscilloscope turns off again and no under voltage fault indicator LEDs are lit the bulk 12 V supply may be defec...

Page 67: ...the supply from the oscilloscope 2 On the backplane assembly measure the resistance across the FET Q1409 located in the upper right corner of the backplane between 12 V and ground as shown below or me...

Page 68: ...ly I 6 If the short is gone replace the motherboard assembly and confirm that the unit powers on 7 If there is still a short circuit remove both acquisition boards and unplug them from the backplane a...

Page 69: ...nd must be replaced 4 Once the faulty board or switch is discovered be sure to reinstall all other parts that were removed as they were not the cause of the problem If the MAIN FAN FAIL LED is lit If...

Page 70: ...hutdown function is operating properly Replace the backplane If the PRED FAN FAIL LED is lit In addition to three case fans there is also a single fan attached to the backplane assembly that cools the...

Page 71: ...most likely that the rotation sensor on the ICs fan is defective Replace the trigger ICs fan and redo this part of the diagnostic test If the oscilloscope stays on after you reset the shutdown logic b...

Page 72: ...Connect the external keyboard to the rear panel 3 Press Delete as soon as the following prompt appears on the bottom of the screen Press DEL to enter SETUP F12 to select boot device If the prompt doe...

Page 73: ...easure is correct but the unit still has not beeped and started up the motherboard is defective and needs to be replaced 3 If the potential you measure is not correct shut the oscilloscope down and un...

Page 74: ...e you plug the motherboard cables back into the PCIe to SATA converter on the new backplane assembly measure the resistance to the chassis from the pin 9 contact in the connector that plugs into J1201...

Page 75: ...nel power cable and backlight enable connector Still black Replace front panel board Still black Replace LCD Still black Done No Yes No Yes Yes Replace motherboard Replace motherboard Yes No Yes Check...

Page 76: ...ermine which assembly to replace Test Group Test Name Error Type Assembly to Replace Timebase Timebase Interpolator Test Backplane ADC ADC Register Tests ADC1 ADC2 ADC3 ADC4 Lower acquisition ADC5 ADC...

Page 77: ...anel board from the keyboard assembly 3 Separate the elastomeric keypad from the keyboard assembly 4 Visually inspect the keypad checking for missing black pills or contamination that may prevent prop...

Page 78: ...f board to the motherboard and check the connections of all cables on the on off board and the motherboard If any of the other LEDs on the front panel are not working the first step is to troubleshoot...

Page 79: ...ouch screen troubleshooting flowchart Is the Touch key lit Press Touch key Does touch screen work Done No Yes Replace motherboard No Perform Touch Screen Test Did test pass Is USB front touch cable da...

Page 80: ...wer outputs are on the front panel in the lower left corner of the 3 5 mm inputs Refer to the following figure to check the power output at the connectors Measure the voltages with respect to the grou...

Page 81: ...blem likely was detected A warning appears To resolve the problem shut down the scope and allow it to cool Make sure the fan holes are not blocked and allow at least 4 inches of space next to the osci...

Page 82: ...e MSO cable is connected it must be oriented as shown on the label on the back of the oscilloscope see the following figure If the cable is upside down the pins may bend and cause a faulty connection...

Page 83: ...oblems that may occur when an optional hardware serial trigger assembly is installed and how to troubleshoot them If a signal appears on screen but the eye scan diagram consists of only a solid blue b...

Page 84: ...rovide 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 t...

Page 85: ...rts 96 Removing and replacing the motherboard 100 Removing and replacing the acquisition boards backplane MSO assembly 106 Removing the backplane assembly from the acquisition assembly 113 Replacing t...

Page 86: ...edures in this chapter you must use proper ESD precautions As a minimum you must place the oscilloscope on a properly grounded ESD mat and wear a properly grounded ESD wrist strap CAUTION Failure to i...

Page 87: ...illoscope Accessories include all cables Do not include accessories unless they are associated with the failure symptoms 3 Protect the oscilloscope by wrapping it in plastic or heavy paper 4 Pack the...

Page 88: ...rd printer USB and LAN 2 Remove the four M3 screws from the rear edge of the top panel When replacing use a Torx T10 to torque to 5 in lbs 3 Slide the top panel back 1 to 2 inches and then lift it off...

Page 89: ...m V Series Oscilloscopes Service Guide 89 To replace the top and bottom panels reverse this procedure NOTE All sheet metal holes that are supposed to have screws placed in them are marked by lines on...

Page 90: ...ies Removing and replacing the front panel assembly 1 Disconnect the power cable and remove the top panel as described earlier 2 Disconnect the on off cable and the display cable from the motherboard...

Page 91: ...Oscilloscopes Service Guide 91 4 Disconnect the USB front touch screen cable from the USB connector on the motherboard 5 Disconnect the display cable s 4 pin connector from the connector on the rear o...

Page 92: ...he rear of the bottom panel Remove the remaining 13 screws from the bottom panel and lift the bottom panel off the chassis 8 Disconnect the two Cal Out Aux Out cables from the backplane board Pull the...

Page 93: ...priate connections by matching the colored o ring to the bezel color Tighten to 8 in lbs using a calibrated 5 16 open end torque wrench 10 Remove the attenuator power cable from each input channel att...

Page 94: ...Oscilloscopes Service Guide 5 Replacing Assemblies 11 Remove the probe comp cable from the backplane board 12 Remove the two M3 screws that attach the bottom of the chassis and the front panel assembl...

Page 95: ...cable and on off cable through the grommet on the chassis after disconnecting them from the other side of the connections 14 Remove the front panel To replace the front panel assembly reverse this pro...

Page 96: ...ope from scratches and pull on the dark gray plastic clutches to pop them off the oscilloscope 2 The front panel bezel has two tabs on each side one tab on top and one tab on the bottom Pop these tabs...

Page 97: ...keyboard unlatch the two clips from the back of the front panel deck and unsnap the board from the deck pulling out the side closest to the display first as shown below 5 If you are replacing the keyb...

Page 98: ...bs holding the board to the keypad as shown below To reassemble the front panel board reverse these steps Removing the display assembly 1 Remove the front panel assembly and front panel bezel as descr...

Page 99: ...99 3 Disconnect the backlight cable from the controller assembly 4 Disconnect any cables connected to the display Figure 21 NOTE If you are replacing the display you may need to loosen the four screw...

Page 100: ...2 Disconnect the blue and red SATA cables from the PCIe to SATA adapter board When replacing the motherboard be careful to reconnect the blue SATA cable to the connector marked BLUE on the adapter bo...

Page 101: ...e instrument has the optional GPIB board remove it from the PCIe slot 5 Disconnect the USB front touch screen cable from the USB connector on the motherboard 6 Disconnect the other connector with the...

Page 102: ...sconnect the PC power cable 4 pin connector from the motherboard 8 Disconnect the largest connector of the PC power cable from the connector on the motherboard 9 Disconnect the solid state drive SATA...

Page 103: ...Assemblies 5 Infiniium V Series Oscilloscopes Service Guide 103 10 Disconnect the on off cable and the display cable from the motherboard 11 Disconnect the USB 3 0 cable from the motherboard Figure 30...

Page 104: ...0 bit 13 Slide the motherboard out away from the chassis 14 Remove the support bracket from the bottom of the motherboard To replace the motherboard reverse these procedures When the replacement mothe...

Page 105: ...EXPLOSION If you replace the ADLINK lithium battery on the motherboard there is a danger of explosion if the battery is incorrectly replaced Replacement with only with the same or equivalent type rec...

Page 106: ...described previously 2 From the top side of the oscilloscope remove the eight cables connected to the backplane board One of these cables is the IC fan cable circled in the photo below It is toward t...

Page 107: ...ated at the bottom of the power supply and then push the power supply to the side to disengage its connection to the backplane board With it pushed to the side use a hand screwdriver to carefully star...

Page 108: ...the screws is circled below 6 Turn the oscilloscope upside down and remove the SMA connections to the bottom of the backplane board When reconnecting route these cables underneath the input cables Th...

Page 109: ...sounds when each cable is fully engaged 8 Disconnect each input cable and carefully route them through the openings in the backplane When reconnecting you can determine the correct connections by mat...

Page 110: ...wer cable from each input channel attenuator and route the cable through the grommet in the backplane The attenuators are keyed to match the connectors 10 Remove the rear panel BNCs The bottom figure...

Page 111: ...top of the backplane board and two M4 screws from the rear of the oscilloscope 12 Ensure all cables are disconnected from the backplane board Look from both the top and bottom of the oscilloscope to s...

Page 112: ...s Service Guide 5 Replacing Assemblies The following figures show the removed assemblies in DSOV and DSAV models first photo and MSOV models second photo Figure 46 Figure 47 Acquisition boards Backpla...

Page 113: ...he previous section 2 Remove the four M4 screws two on each side from the rear panel of the assembly six M4 screws if the oscilloscope has the hardware serial trigger option or is an MSO model as show...

Page 114: ...V Series Oscilloscopes Service Guide 5 Replacing Assemblies 5 Disconnect the two attenuator cables shown below 6 Disconnect the two semi rigid cables from the acquisition boards circled below Figure...

Page 115: ...has the hardware serial trigger option or is an MSO model as shown below 8 Remove the top acquisition board channels 3 and 4 first carefully guiding the input cables through the slots Use the handles...

Page 116: ...uisition assembly removed 9 For oscilloscopes with the hardware serial trigger option disconnect both of the SMP SMP cables from the connectors on the serial trigger board and the acquisition board Wh...

Page 117: ...Infiniium V Series Oscilloscopes Service Guide 117 10 Remove the bottom acquisition board channels 1 and 2 from the backplane frame assembly To reassemble the backplane acquisition assembly reverse th...

Page 118: ...eed to remove them from the old board and place them on the new board 1 Remove the backplane assembly from the acquisition assembly as described in the previous section 2 Remove the clock splitter osc...

Page 119: ...ds from the old backplane board using an open end wrench Install them onto the new board and torque to 5 in lbs 5 Install the oscillator assembly into the backplane board using the bracket to guide th...

Page 120: ...g Assemblies 6 Connect the cable from the oscillator to connector J303 on the backplane board 7 Connect the SR oscillator reference cable to its connector on the oscillator Reference IN connector Torq...

Page 121: ...21 8 Connect one end of the semi rigid SR Backplane Clock Out cable to connector J300 on the backplane board and the other end to the clock splitter as shown Torque both ends to 8 in lbs The semi rigi...

Page 122: ...blies 9 Connect the SR Clock CH1 CH2 cable to its connector closest to the edge of the splitter Finger tighten Connect the SR Clock CH3 CH4 cable to its connector on the splitter closest to the fan Fi...

Page 123: ...he old board and place them on the new one 1 Remove the acquisition assembly from the backplane assembly as described earlier 2 Remove the 9 screws from the old acquisition board and save them to atta...

Page 124: ...cquisition board 7 Insert the right angle SMPM end of the first input cable through the bottom of the acquisition tray assembly The cables route through the plastic grommet and through the oval hole i...

Page 125: ...needle nosed pliers to guide the right angle SMPM into place You will hear a double snap sound when the connector is properly seated 9 Repeat the previous step for the second input cable 10 Press the...

Page 126: ...cing an acquisition board you must perform a service calibration including the interleave response correction and then perform a self test procedure Refer to Chapter 2 Calibration for details NOTE The...

Page 127: ...d replacing the hard disk drive 1 Loosen the two screws on back of the hard disk drive 2 Pull the hard drive out 3 Remove the four screws connecting the disk drive to the plate To replace the hard dis...

Page 128: ...Disconnect the AC power cable from the bulk 12 V power supply 3 Follow the remaining instructions on the power supply to remove it WARNING SHOCK HAZARD If the power supply is defective it could have a...

Page 129: ...cted to the fan bracket 3 Disconnect the fan harness cables from the fans you want to replace 4 Clip off the end of the top two fan mounts from the fan as shown leaving the bottom mounts attached and...

Page 130: ...UTION 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 Check the flow arrows on the fan...

Page 131: ...To replace the standard profile bracket with a V Series Profile Bracket 1 Remove the hex screws that hold the connector bracket and the standard profile bracket by using a hex 9 32 tightening torque 7...

Page 132: ...132 Infiniium V Series Oscilloscopes Service Guide 5 Replacing Assemblies...

Page 133: ...arts Ordering Replaceable Parts 134 Exploded Views 135 Replaceable Parts List 139 This chapter describes how to order replaceable assemblies and parts for the Infiniium V Series oscilloscopes Service...

Page 134: ...through a direct mail order system There are several advantages to this system Direct ordering and shipping from the Keysight Technologies parts center in California USA No maximum or minimum on any m...

Page 135: ...6 Infiniium V Series Oscilloscopes Service Guide 135 Exploded Views Front frame and front panel MP15 MP14 MP13 MP12 MP16 MP11 MP10 MP9 MP7 MP8 MP6 W1 MP3 MP1 MP4 MP5 MP2 A5 A4 A3 A1 A2 MP20 MP21 A6 A...

Page 136: ...136 Infiniium V Series Oscilloscopes Service Guide 6 Replaceable Parts Fan and acquisition assembly W7 MP26 A9 A14 W3 W2 MP24 MP25 A11 W5 A10 W6 MP28 A12 A13 W4 MP23 MP22 MP27 A8...

Page 137: ...Replaceable Parts 6 Infiniium V Series Oscilloscopes Service Guide 137 Power supply and PC motherboard A18 W9 W10 W8 MP31 MP29 A17 A16 A15 A20 A19 MP30 MP32...

Page 138: ...138 Infiniium V Series Oscilloscopes Service Guide 6 Replaceable Parts External parts MP35 MP34 MP33 MP40 MP38 MP39 MP36 MP37 MP41...

Page 139: ...r front panel RoHS version of 33325 60013 A8 54919 00104 1 Chassis A9 54919 66721 2 Acquisition PCA usable for up to and including 33 GHz tested A9 54919 69721 2 Acquisition PCA usable for up to and i...

Page 140: ...zel MP2 54919 94310 1 Label DSOV084A MP2 54919 94311 1 Label DSOV134A MP2 54919 94312 1 Label DSOV164A MP2 54919 94313 1 Label DSOV204A MP2 54919 94314 1 Label DSOV254A MP2 54919 94315 1 Label DSOV334...

Page 141: ...Label control panel MP18 54919 40201 1 Panel control MP19 54919 41901 1 Switch control panel and on off MP20 54919 01206 1 Bracket cal connectors MP21 54919 00101 1 Deck front panel MP22 54919 00204...

Page 142: ...able SR Clock Ch1 Ch2 W4 54916 61601 1 Cable input W5 54919 61629 1 Cable SMP SMP W6 54919 61624 1 Cable Step Aux Out W7 54916 61619 1 Cable oscillator reference W8 54916 61622 4 Cable Aux BNC SMA W9...

Page 143: ...N2834 68703 1 MSO calibrator board assembly 54916 94337 1 Label MSO cable direction 54919 94340 1 Label bandwidth upgrade 13 GHz 54919 94341 1 Label bandwidth upgrade 16 GHz 54919 94342 1 Label bandwi...

Page 144: ...ceable Parts 8120 1632 1 Power cord China 8121 1660 1 Power cord Thailand 8121 1858 1 Power cord Brazil 8121 1636 1 Power cord Taiwan 8121 1640 1 Power cord Cambodia 54919 00105 1 V Series Profile Bra...

Page 145: ...s Oscilloscopes Service Guide 7 Theory of Operation Motherboard assembly 148 Acquisition assembly 149 Backplane assembly 151 Front Panel Assembly 157 Power Supply Assembly 158 MSO assembly 159 Hardwar...

Page 146: ...wer Supply AC AC In AC Connector and Line Filter 12V DC Fan Control Pwr Conn Sig Conn Trigger Out Ext Trigger In Cal Out Main FPGA Main Fans Pwr Conn Sig Conn Backplane Assembly Front Panel Ref In Ref...

Page 147: ...ised of five or six main assemblies depending on the model a motherboard assembly an acquisition assembly a backplane assembly a front panel assembly and a power supply assembly for all models plus a...

Page 148: ...tell the motherboard to power up and become fully functional The following figure illustrates this system start up process It is common for the motherboard to be revised during the life of the oscillo...

Page 149: ...d 4 the lower acquisition board does the same for channels 1 and 2 Both acquisition boards contain the Oak B module a full custom ball grid array multi chip module the Onboard ADC clock distribution d...

Page 150: ...B then go into one differential input pair of the ADC Each ADC has two sets of differential inputs Oak B module and acquisition components MEM CON MEM CON MEM CON MEM CON ADC ADC ADC ADC Sampler Coupl...

Page 151: ...e colors in the diagram represent different signal groups The backplane provides power red clock generation pink trigger green and calibrator yellow functions to the oscilloscope as well as communicat...

Page 152: ...unctional When everything is ready the FPGA sends a reset to the PC motherboard so that Windows and the oscilloscope software can start up The FPGA is a device on the PCIe bus x1 interfaced with an ex...

Page 153: ...nnects to each of the two acquisition boards A separate bus for each FPGA minimizes timing problems and reflections The FPGAs on the acquisition assemblies are used to control the oscilloscope functio...

Page 154: ...is divided down to 1 GHz for use as TbClk and DigClk TbClk is divided by four to generate RefClk which drives the memory controllers and the calibrator chip These four 250 MHz outputs are phased in q...

Page 155: ...ck generation The fundamental frequency reference of the oscilloscope s timebase clock is a low noise precision 10 MHz signal This 10 MHz reference can originate from the internal oven controlled crys...

Page 156: ...e for some other instrument and the second path is limited and filtered for use as the reference input to the 100 MHz phase locked oscillator The signal that goes to the rear panel is very close to th...

Page 157: ...igure shows a simplified block diagram of the oscilloscope front panel On Off board The on off board interfaces with the motherboard to provide the on off switch function and with the backplane to pro...

Page 158: ...vice Guide 7 Theory of Operation Power Supply Assembly The power supply assembly consists of a power interface board and a bulk 12 V power supply The power interface board does filtering and provides...

Page 159: ...ackplane board MSO printed circuit assembly Scope channels X4 FPGA Comparator CLK diff D3 0 4 GPdata GPdata diff pair D7 4 D11 8 D15 12 4 SERDES 4 SERDES 4 SERDES 4 SERDES 21 SERDES 6 Comparators 64 b...

Page 160: ...um V Series Oscilloscopes Service Guide 7 Theory of Operation MSO board FPGA Main FPGA Config PROM Philips PX 1011A Misc I Cs SATA Conn Backplane Board Trigger FPGA PCIe Cables JTAG Conn JTAG Conn MSO...

Page 161: ...below the lower acquisition board Available for DSO and DSA models it provides the capability for users to trigger on a specific portion of a serial stream of data at up to 12 5 Gbps Hardware serial t...

Page 162: ...162 Infiniium V Series Oscilloscopes Service Guide 7 Theory of Operation...

Page 163: ......

Page 164: ...This information is subject to change without notice Keysight Technologies Inc 2015 2017 2021 2022 Eighth edition July 2022 54919 97018 54919 97018 www keysight com...

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