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Chapter 4: Troubleshooting

Under-Voltage Fault

63

If there is still a short circuit, then both acquisition boards need to be removed. Once the 
acquisition assemblies have been removed and unplugged from the backplane assembly, 
measure each assembly individually to see if there is a short between the +12V net and ground 
(see the figure below). The resistance you should see on a good acquisition assembly between 
the +12V net and ground is about 2000 ohms. Make sure you make the measurement using a 
DVM with the red lead plugged into the HI input and the black lead plugged into the LO or 
COMMON inputted the DVM. If there is a short between these two nets, the reading you will 
get will be very low (near zero ohms). Measure both acquisition assemblies and replace as 
required. 

Figure 4-9

This figure shows how to measure the acquisition assembly resistance b12V and ground on the back side of the 
board on the right end of the power connector. 

If no shorts are found on the bulk 12V supply net or if you have fixed all the shorts and the unit 
still will not turn on then a series of steps need to be followed which includes replacing parts 
with “known good” ones until the problem has been discovered. 

Start by replacing the bulk 12V power supply with a known good supply. If the oscilloscope still 
does not power on, replace the motherboard with a known good one. If the oscilloscope still 
does not power on, replace the front panel ON/OFF switch with a known good one. If the 
oscilloscope still does not power on then it can only be the backplane assembly causing the 
problem and it needs to be replaced. Once the faulty board or switch is discovered, all previous 
parts removed from the instrument should be reinstalled as they were not the cause of the 
problem. 

Содержание Infiniium 90000 A

Страница 1: ...Service Guide Publication Number 54913 97022 March 2013 Agilent Technologies Inc 2007 2013 Infiniium 90000 A Series Oscilloscopes...

Страница 2: ...implify complex measurement setups Horizontal controls set sweep speed and position Main sweep speeds from 5 ps div to 20 s div Zoom mode is from 1 ps div to main time base setting Intensified wavefor...

Страница 3: ...n procedure Chapter 3 Testing Performance provides information about testing the oscilloscope to verify that it performs according to specifications Chapter 4 Troubleshooting provides information abou...

Страница 4: ...4...

Страница 5: ...ope 53 Primary Trouble Isolation 54 Power Supply Trouble Isolation 57 Under Voltage Fault 60 Over Temperature Fault 65 Over Voltage Fault 68 Display Trouble Isolation 71 To check the backlight inverte...

Страница 6: ...108 To remove the backplane assembly from the acquisition assemblies 112 To set the calibration factors after replacing the acquisition board 113 To remove and replace the hard disk drive and the hard...

Страница 7: ...nstruments covered by this service guide 8 Accessories supplied 10 Specifications and Characteristics 10 Environmental Conditions 11 Measurement Category 11 Oscilloscope Dimensions 12 General Informat...

Страница 8: ...chnologies website at www agilent com to see whether a newer version of this manual is available The following 90000 A Series oscilloscopes are covered in this guide Table 1 1 Oscilloscopes Covered by...

Страница 9: ...f the 90000 A Series oscilloscope This service guide covers both the standard and performance enhanced versions of the 90000 A Series scopes Any differences between the two versions are noted To tell...

Страница 10: ...haracteristics refer to the data sheets at www agilent com find 90000 Specifications that are pertinent to each test are given in the Testing Performance chapter Specifications are valid after a 30 mi...

Страница 11: ...asurements performed on circuits not directly connected to MAINS Examples are measurements on circuits not derived from MAINS and specially protected internal MAINS derived circuits In the latter case...

Страница 12: ...6HQVL WLYLW OHDU LVSOD 4XLFN 0HDV RRP 5XQ 6WRS 6WRS 6LQJOH 6LQJOH 7RXFK X 2XW X 7ULJ OO QSXWV 9 0D 7 3XVK IRU 9HUQLHU HUQLHU HYHO QWHQVLW RUL RQWDO 5XQ RQWURO 7ULJJHU LVSOD 0HDVXUH 9HUWLFDO 6HOHFW 3RV...

Страница 13: ...2 To run the self calibration 15 Calibration...

Страница 14: ...14 Calibration This chapter provides self calibration procedures for the oscilloscope...

Страница 15: ...down the Utilities menu and Select Calibration 3 Click the check box to clear the Cal Memory Protect condition You cannot run self calibration if this box is checked See Figure 2 1 Let the Oscilloscop...

Страница 16: ...erence signal will not be required The remaining calibration procedure will continue b Disconnect everything from all inputs and Aux Out c Connect the calibration cable from Aux Out to channel 1 You m...

Страница 17: ...ming Self Test and Calibration 19 Vertical Performance Verification 20 Offset Accuracy Test 21 DC Gain Accuracy Test 29 Analog Bandwidth Maximum Frequency Check 35 Time Scale Accuracy TSA 42 Performan...

Страница 18: ...t Order The tests in this section may be performed in any order desired However it is recommended to conduct the tests in the order presented in this manual as this represents an incremental approach...

Страница 19: ...n the Utilities menu and select Self Test b Select Scope Self Test from the Self Test list c Click on Start Self Test to start the self test procedure If any of the self tests fail ensure that the fai...

Страница 20: ...20 Vertical Performance Verification This section contains the following vertical performance verification Offset Accuracy Test DC Gain Accuracy Test Analog Bandwidth Test...

Страница 21: ...ion 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 te...

Страница 22: ...w is displayed 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 sensitivity of channel 1 to...

Страница 23: ...e Test Record 5 Change the vertical sensitivity of channel 1 to 10 mV div press the Clear Display key wait for the Avgs value top left corner of screen to return to 256 and then record the scope V avg...

Страница 24: ...b Change the vertical sensitivity of channel 2 to 5 mV div c Click the V avg measurement icon on the left side of the screen d When the Enter Measurement Info window is displayed ensure that the Vavg...

Страница 25: ...cope channel input to minimize ground potential differences and to ensure that the DMM measures the input voltage to the scope channel as accurately as possible Differences in ground potential can be...

Страница 26: ...ed enable averaging and set the of averages to 256 c Change the vertical sensitivity of channel 1 to 5 mV div d Click the V avg measurement icon on the left side of the screen e When the Enter Measure...

Страница 27: ...c Enter 400 0 mV in the Enter Offset dialog box 16 Set the Aux Out voltage VAux Out to 400 0 mV as follows a Pull down the Utilities menu and select Calibration b Change the Aux Output function to DC...

Страница 28: ...in the Offset Gain Test section of the Performance Test Record 24 Calculate the offset gain error using the following expressions and record the value in the Offset Gain Test section of the Performanc...

Страница 29: ...2 of full scale at full resolution channel scale Full scale is defined as 8 vertical divisions Magnification is used below 5 mV div Below 5 mV full scale is defined as 40 mV The major scale settings...

Страница 30: ...to minimize ground potential differences and to ensure that the DMM measures the input voltage to the scope channel as accurately as possible Differences in ground potential can be a significant sourc...

Страница 31: ...ollows a Pull down the Utilities menu and select Calibration b Change the Aux Output function to DC top left corner c Set the Level to 15 mV d Click on Close 4 Set the channel 1 vertical sensitivity v...

Страница 32: ...for the Avgs value top left corner of screen to return to 256 and then record the scope s mean V avg reading in the DC Gain Test section of the Performance Test Record Notes For all scope readings in...

Страница 33: ...Setup menu and select Acquisition When the Acquisition Setup window is displayed enable averaging and set the of averages to 256 b Change the vertical sensitivity of channel 2 to 5 mV div c Click the...

Страница 34: ...n and record this value in the DC Gain Test section of the Performance Test Record For vertical sensitivities of less than 1 volt use the following equation For vertical sensitivity 1 V use the follow...

Страница 35: ...0604A 6 0 GHz DSO DSA90404A 4 0 GHz DSO DSA90254A 2 5 GHz Description Critical Specifications Recommended Model Part Numbers Microwave CW Generator Maximum Frequency 14 GHz Power range 20 dBm to 16 dB...

Страница 36: ...nsure Channel 1 is displayed and all other channels are turned off b Set the vertical sensitivity of channel 1 to 5 mV div Notes Connect output 1 of the 11667B splitter to the scope Channel n input di...

Страница 37: ...cles of a 50 MHz waveform d Pull down the Setup menu select Acquisition and then set up the acquisition parameters as follows Memory Depth Automatic Sampling rate Maximum 40 GSa s Sin x x Interpolatio...

Страница 38: ...mended amplitude then set the generator to the highest value that does not produce a vertically clipped signal on the scope Table 3 1 Nominal Generator Amplitude Settings 8 Measure the input power to...

Страница 39: ...0 Calculate the reference gain as follows Record this value in the Calculated Gain 50 MHz column in the Analog Bandwidth Maximum Frequency Check section of the Performance Test Record Notes For all sc...

Страница 40: ...og Bandwidth Maximum Frequency Check section of the Performance Test Record Vout Max Freq 15 Calculate the gain at the maximum frequency using the expression For example if Vout Max Frequency 13 825 m...

Страница 41: ...Right click on the V rms measurement at the bottom of the screen When the RMS voltage measurement setup window is displayed change the source from Channel 1 to Channel 2 22 Repeat steps 7 to 20 to com...

Страница 42: ...te that TSA is specified with respect to an absolute standard and therefore its measurement results mustbe comparedagainsttestlimits thataccountfortheuncertaintiesinits measurement results The total m...

Страница 43: ...e to 20 ms div 7 Set the measurement thresholds for all waveforms to a fixed voltage level of 0 V and 20 mV hysteresis 8 Enable a frequency measurement on channel 1 9 On the oscilloscope press Stop 10...

Страница 44: ...rformance Time Scale Accuracy TSA 44 measurement result should exceed the specified accuracy by at least 0 1 ppm in order to guarantee compliance to the specification 16 Record the results in the Perf...

Страница 45: ...______ Recommended Test Interval 1 Year 2000 hours Date___________________ Recommended next test date ___________________ Ambient temperature ___________________ Vertical Sensitivity Test Limits Chann...

Страница 46: ...div 2 4 V 2 500 mV div 2 4 V 2 1 V div 2 4 V 2 Channel 2 5 mV div 400 mV 2 10 mV div 400 mV 2 20 mV div 400 mV 2 50 mV div 900 mV 2 100 mV div 1 6 V 2 200 mV div 2 4 V 2 500 mV div 2 4 V 2 1 V div 2 4...

Страница 47: ...500 mV div 1 5 V 2 1 V div 2 4 V 2 Channel 2 5 mV div 15 mV 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 Channel...

Страница 48: ...nt Vin 50 MHz Vout 50 MHz Calculated Gain 50 MHz Test Limit greater than 3 dB Vin Max Freq Vout Max Freq Calculated Gain Max Freq Test Limit greater than 3 dB Channel 1 5 mV div 10 mV div 20 mV div 50...

Страница 49: ...ecord 49 Test Limits Results Time Scale Accuracy Limit Limit is based on years since oscilloscope s last calibration Calculated TSA Spec Measuredtime scale error Pass Fail TSA 0 4 0 5 Years Since Cali...

Страница 50: ...Chapter 3 Testing Performance Performance Test Record 50...

Страница 51: ...oltages 73 To check the display board video signals 74 Front Panel Display Trouble Isolation 75 Front Panel Trouble Isolation 77 Motherboard Verification 78 To setup the BIOS 79 Acquisition Backplane...

Страница 52: ...ack in place before turning the oscilloscope on If the procedure requires you to have the cover off be careful not to contact these fan blades with any part of your body Tools Required You will need b...

Страница 53: ...ty assembly use the disassembly and assembly procedures in Replacing Assemblies beginning on page 89 to replace the assembly The primary procedural toolin this section is the Primary Trouble Isolation...

Страница 54: ...y two seconds for the scope to lose power go to the Under voltage Fault section in this chapter 2 If it takes four seconds or more for the scope to lose power go to the Over temperature Fault section...

Страница 55: ...both directions until you have turned all knobs When you turn a knob in one direction half the rotation arrow under the corresponding knob symbol should turn green When you then turn the knob in the o...

Страница 56: ...look at the details to see the channel associated with the fail If it is not channel 1 then replace the acquisition board associated with that channel channels 1 and 2 lower acquisition board channel...

Страница 57: ...rform the maintenance Read the safety summary at the back of this book before proceeding Failure to observe safety precautions may result in electric shock WARNING SHOCK HAZARD Once the bulk 12V power...

Страница 58: ...Chapter 4 Troubleshooting Power Supply Trouble Isolation 58 Figure 4 4...

Страница 59: ...aults under voltage faults a defective power supply is included in this section over temperature faults and over voltage faults The following sections will describe each of these faults in detail so y...

Страница 60: ...have determined that it takes approximately two seconds for the oscilloscope to lose power the next step is to remove the handle the outer oscilloscope cover and the inner top cover This will expose...

Страница 61: ...minated when AC power is applied to the instrument the bulk 12V supply might need to be replaced Be sure to verify the operation of the AC OK and DC OK signals first The AC OK signal indicates that th...

Страница 62: ...there is a short on this board you would measure something very near zero ohms If there is a short disconnect the power cable to the front panel see Figure 4 6 and redo the resistance measurement If...

Страница 63: ...9 This figure shows how to measure the acquisition assembly resistance between 12V and ground on the back side of the board on the right end of the power connector If no shorts are found on the bulk 1...

Страница 64: ...cope still will not power on after you have followed the required steps in this Power Supply Trouble Isolation section and assuming you have looked through the other two sections included in this Powe...

Страница 65: ...embly that cools the trigger ICs In order for the instrument to shut down because of a cooling system fault one of the following condition must exist The circuitry that generates the reference potenti...

Страница 66: ...rner of the backplane assembly refer to the circled area in Figure 4 12 above If this LED is illuminated then that means the system thinks there is a fan failure Since you have ruled out the case fans...

Страница 67: ...ot to touch the fan blades with your fingers The unit will shut down Reset the logic by removing AC power for thirty seconds and make the case fans so they all cannot rotate for example either by two...

Страница 68: ...that the oscilloscope loses power almost immediately the next step is to remove the handle the outer oscilloscope cover and the inner top cover This will expose the mother board cavity and the top ed...

Страница 69: ...ing picture Figure 4 16 shows the fan opening with the fan removed This is done to shows where these LEDs are located on the acquisition assemblies and is not required in your actual diagnosis You wil...

Страница 70: ...see any of these over voltage LEDs illuminated that acquisition assembly needs to be replaced If the oscilloscope still will not power on after you have followed the required steps in this Power Suppl...

Страница 71: ...Chapter 4 Troubleshooting Display Trouble Isolation 71 Display Trouble Isolation...

Страница 72: ...er and check power up sequence Power up displayed on ext monitor Replace Display Board Go to Primary Trouble Isolation Go to Power Supply Trouble Isolation Go to To check the backlight Inverter voltag...

Страница 73: ...n the two wires when the backlight is illuminated The voltage is approximately 1 kV before the backlight tube is illuminated A red LED on the backlight inverter board illuminates when the output volta...

Страница 74: ...are not present suspect the display card If the signals are present and the backlights are on suspect the flat panel display as the problem Note that CLK A0 A1 A2 and A3 are Low Voltage Differential...

Страница 75: ...and LCD No Does front panel display work Try a golden display card to verify failure Does display work with golden card Replace LCD Replace display card Replace motherboard Check inverter board contr...

Страница 76: ...CAN RESULT Once the cover is removed the fan blades are exposed both inside and outside the chassis Disconnect the power cable before working around the fans Use extreme caution in working with the o...

Страница 77: ...er 4 Troubleshooting Front Panel Trouble Isolation 77 Front Panel Trouble Isolation Front Panel TroubleIsolation Followthekeyboard troubleshootingguidefor just thepower button Goto PrimaryTrouble Isol...

Страница 78: ...trument Then unplug the front panel power cable see Figure 4 6 the two large power cables that go to the motherboard power harness J1201 and J1202 see Figure 4 8 and the red and blue SATA cables J900...

Страница 79: ...ess Delete when the following prompt appears on the bottom of the screen Press TAB to Show POST screen DEL to enter SETUP F12 to select boot device If the prompt does not appear or the oscilloscope do...

Страница 80: ...he linearity of each channel s front end DAC If the test finds a problem it will report a failure for the DAC on the associated channel Board Level Repair Re solder or replace the DAC that is failing...

Страница 81: ...rs cannot be corrected the Hedwig IC with the associate errors must be replaced Hedwig Register Test This test verifies that all of the Hedwig memory controller ASIC registers can be correctly written...

Страница 82: ...hat is outside of the expected operating range a failure will be reported for the IC associated with that temperature sensor Board Level Repair This test should never fail since the oscilloscope will...

Страница 83: ...toProbe Board Trouble Isolation AutoProbe Board Trouble Isolation Inspect the cable between the AutoProbe assembly and the power board Cable OK Replace bad cable No Yes Turn unit on Does unit turn ON...

Страница 84: ...ssembly CAUTION CONTAMINATION CAN CAUSE INTERMITTENT OPERATION Be careful not to contaminate the key side of the PC board or the keypads Dust and fingerprints on these parts may cause intermittent key...

Страница 85: ...ecting the ON OFF board to the motherboard If any of the other LEDs are not working on the front panel the first step is to trouble shoot the acquisition assemblies to make sure they are working If th...

Страница 86: ...om the Help Menu A dialog box appears showing the current version number for the scope software and on line information system software This information may be useful when contacting Agilent Technolog...

Страница 87: ...board Usethetableandfiguretotheright to check the power output at the connectors The 12 V and 12 V supplies come from ripple regulator on the power board and the 3 V and 3 V supplies are developed in...

Страница 88: ...Chapter 4 Troubleshooting To check probe power outputs 88...

Страница 89: ...d 103 To remove and replace the touch screen the front deck and the controller assembly 104 To remove and replace the acquisition boards backplane assembly 108 To set the calibration factors after rep...

Страница 90: ...uired for these procedures Torx drivers T10 T20 Socket wrench 9 16 inch Torque wrench 3 5 mm 8 in lbs Medium size 3 16 in flat blade screwdriver CAUTION REMOVE POWER BEFORE REMOVING OR REPLACING ASSEM...

Страница 91: ...t to the oscilloscope Name and address of owner Oscilloscope model numbers Oscilloscope serial numbers Description of the service required or failure indications 2 Remove all accessories from the osci...

Страница 92: ...es and BNC input cables from the front panel 3 Disconnect any other cables such as mouse keyboard printer USB or LAN cables 4 Remove the accessory pouch from the top of the oscilloscope if it is attac...

Страница 93: ...over top plate and bottom plate 93 Figure 5 3 Figure 5 4 8 Carefully slide the cover towards the rear of the instrument and off the chassis as shown in Figure 5 5 Figure 5 5 9 Once the cover is remove...

Страница 94: ...e top plate and lift off as shown in Figure 5 7 Figure 5 6 Figure 5 7 10 To remove the bottom plate flip the oscilloscope upside down and remove the three Torx T20 screws from the bottom panel as show...

Страница 95: ...lace the cover top plate and bottom plate 95 Figure 5 8 Figure 5 9 Figure 5 10 11 To replace the cover top plate and bottom plate reverse the above procedure Please note that all sheet metal holes tha...

Страница 96: ...o remove and replace the cover top plate and bottom plate 96 marked by lines on four sides of the hole as shown in Figure 5 11 Figure 5 11 CAUTION PROPERLY TIGHTEN HANDLE AND SCREWS Tighten the side h...

Страница 97: ...plate 2 Disconnect front panel cables 3 Grasp and pull on all 13 knobs located on the front panel to remove them Figure 5 12 Figure 5 12 4 Use a screw driver to disengage locking tabs located along th...

Страница 98: ...ng Assemblies To remove and replace the front panel bezel and front panel circuit assembly 98 Figure 5 13 Figure 5 14 5 Remove two Torx T10 screws from the front panel printed circuit assembly as show...

Страница 99: ...scussed in step 1 You can see the top left side tab by looking through the top cavity while you can see the bottom left tab by turning the oscilloscope on its side and looking through the bottom cavit...

Страница 100: ...zel and front panel circuit assembly 100 Figure 5 16 Figure 5 17 This figure shows the top left hand side tab for the control panel faceplate The view is through the top cavity standing at the rear of...

Страница 101: ...sis itisbesttosnapthefaceplateandtheassemblytogether first before trying to attach them back to the chassis via these tabs Once they are attached together snap down the right hand side tabs first and...

Страница 102: ...Chapter 5 Replacing Assemblies To remove and replace the on off board 102 Figure 5 20 4 To replace the on off board reverse the above procedure...

Страница 103: ...of the oscilloscope near the flat panel display operates at high voltages from 300 1 kVACrms DO NOT handle this assembly while it is in operation 1 Disconnect the power cable and remove the cover and...

Страница 104: ...e and remove the cover top plate and bottom plate 2 Remove the front panel bezel and front panel circuit assembly from the chassis 3 Remove the two Torx T20 screw attaching the touch screen to the fro...

Страница 105: ...deck two on the right hand side and two on the left hand side See Figure 5 24 Figure 5 24 7 Turn the oscilloscope upside down or on its side and look through the bottom cavity to see the SMA connecto...

Страница 106: ...to the front deck This gives you some room to feed cables through the correct holes and attach them to the correct boards When reattaching the SMA cables use an 8 lb torque wrench as shown in Figure...

Страница 107: ...ese cables on page 117 3 Remove the Torx T10 screws attaching the motherboard to the frame Figure 5 28 The motherboard shown below is the one in the standard 90000A models If you have a performance en...

Страница 108: ...his printing Your unit may look different 1 Disconnect the power cable and remove the cover top plate and bottom plate 2 Remove the motherboard and bulk 12V power supply 3 Turn the oscilloscope on its...

Страница 109: ...backplane assembly 109 Figure 5 32 6 Remove the Torx T20 screws from the top of the backplane assembly Figure 5 33 Figure 5 33 7 Flip the instrument so it is upside down or on its side 8 Remove the To...

Страница 110: ...wo Torx T20 screws from the underside of the backplane assembly Figure 5 35 Figure 5 35 10 If unit is not upside down if you chose to just lay it on its side go ahead and flip it upside down right now...

Страница 111: ...Chapter 5 Replacing Assemblies To remove and replace the acquisition boards backplane assembly 111 Figure 5 36...

Страница 112: ...tion 2 Remove the four Torx T20 screws two per acquisition assembly on the side of the backplane assembly Figure 5 37 Figure 5 37 3 Gently pry on the sheet metal portions to separate the backplane ass...

Страница 113: ...erformance 2 Performance calibration After the warm up period calibrate the oscilloscope a Connect the RS 232 cable to the Digital Multimeter RS 232 port and to the RS 232 port on the oscilloscope b S...

Страница 114: ...fter replacing the acquisition board 114 c Pull down the Utilities menu and select Calibration d Uncheck the Cal Memory Protect box to allow calibration e Click on Start to start the calibration proce...

Страница 115: ...at the time of this printing Your unit may look different 1 Disconnect the power cable and remove the cover and top plate 2 Disconnect the two cables connected to the hard drive 3 Remove the two latc...

Страница 116: ...r 5 Replacing Assemblies To remove and replace the hard disk drive and the hard drive control board 116 Figure 5 41 6 To replace the hard disk drive and hard drive control board reverse the above proc...

Страница 117: ...tures show close ups of each cable Figure 5 51 shows the performance enhanced 90000A motherboard so you know where to reconnect the cables The cables are the same on the performance enhanced models bu...

Страница 118: ...semblies Cable removal for replacing the motherboard 118 Figure 5 43 Figure 5 44 Figure 5 45 S A T Aca blebetwe en m otherboarda nd ha rddrive F ront pa ne l U S B ca ble S A T Aca bles between ba ckp...

Страница 119: ...emblies Cable removal for replacing the motherboard 119 Figure 5 46 Figure 5 47 Figure 5 48 D ispla yca ble between m otherboarda nd front pa nel P ower harness between ba ckplanea nd m otherboard P o...

Страница 120: ...Chapter 5 Replacing Assemblies Cable removal for replacing the motherboard 120 Figure 5 49 Figure 5 50 P owerharness between backplaneand m otherboard O n O ff ca ble...

Страница 121: ...Chapter 5 Replacing Assemblies Cable removal for replacing the motherboard 121 Figure 5 51 Motherboard and cables in performance enhanced 90000 A Series models...

Страница 122: ...it could have a dangerous charge on some capacitors This charge could remain for many days after removing power from the supply WARNING SHOCK HAZARD When the power supply is removed two AC leads are e...

Страница 123: ...ative of the oscilloscope at the time of this printing Your unit may look different 1 Disconnect the power cable and remove the cover and top plate 2 Disconnect the fan harness cables 3 Clip off the e...

Страница 124: ...f this printing Your unit may look different 1 Disconnect the power cable and remove the cover and top plate 2 Unplug the power cable from the 12V power supply refer to Figure 5 52 for the location of...

Страница 125: ...only one will be shown here When necessary refer to other removal procedures The graphics in this chapter are representative of the oscilloscope at the time of this printing Your unit may look differ...

Страница 126: ...Chapter 5 Replacing Assemblies To remove and replace the USB or GPIB port 126...

Страница 127: ...6 Ordering Replaceable Parts 128 Listed Parts 128 Unlisted Parts 128 Direct Mail Order System 128 Exchange Assemblies 128 Exploded Views 129 Replaceable Parts List 133 Replaceable Parts...

Страница 128: ...Mail Order System Within the USA Agilent Technologies can supply parts through a direct mail order system There are several advantages to this system Direct ordering and shipping from the Agilent Tech...

Страница 129: ...Chapter 6 Replaceable Parts Exploded Views 129 Exploded Views Front Frame and Front Panel...

Страница 130: ...Chapter 6 Replaceable Parts Exploded Views 130 Fan and Acquisition Assembly...

Страница 131: ...Chapter 6 Replaceable Parts Exploded Views 131 Power Supply and PC Motherboard...

Страница 132: ...Chapter 6 Replaceable Parts Exploded Views 132 Sleeve and Accessory Pouch...

Страница 133: ...inted Circuit Assembly 8 GHz and above Exchange replaces 54913 69501 A12 54906 66501 2 Acquisition Printed Circuit Assembly 6 GHz and below replaced by 54906 66511 A12 54906 69501 2 Acquisition Printe...

Страница 134: ...ce enhanced models MP1 54913 94335 1 Label DSO 90404A performance enhanced models MP1 54913 94336 1 Label DSO 90254A performance enhanced models MP1 54913 94346 1 Label DSA 90254A performance enhanced...

Страница 135: ...an not shown W6 54913 61604 1 Cable ON OFF not shown W7 54913 61608 1 Cable Display not shown W8 54913 61601 4 Cable Input not shown 54913 61607 1 Cable USB Touch standard models 54913 61617 1 Cable U...

Страница 136: ...Chapter 6 Replaceable Parts Replaceable Parts List 136...

Страница 137: ...7 Block Level Theory 139 Power Supply Assembly 141 Monitor Assembly 141 Acquisition System 141 Front Panel 142 Motherboard 144 On Off Board 144 Theory of Operation...

Страница 138: ...Chapter 7 Theory of Operation 138 Figure 7 1 Oscilloscope Block Diagram...

Страница 139: ...utoProbe interface for probe power and probe control A connection for probe compensation The rear panel provides several connections The line power input A GPIB connector for connection to an oscillos...

Страница 140: ...Chapter 7 Theory of Operation Block Level Theory 140 Figure 7 2 AcquisitionBoards BackplaneBoard...

Страница 141: ...d is essentially a device on the PCI Express bus connected by two SATA cables to the motherboard The backplane board recieves 12V power through a distribution board from the supply and all voltage are...

Страница 142: ...he scope PC motherboard through a high speed USB 2 0 interface The on board USB hub serves the PIC microcontroller the touch screen controller board and up to three front panel USB connectors for a cu...

Страница 143: ...yboard block diagram Disk Drive The hard disk drive is a high capacity shock resistant unit It is used to store the oscilloscope s operating system and certain system configuration data The drive can...

Страница 144: ...ovide the probe compensation output Power indicator LEDs backlight the on off pushbutton and are driven by the motherboard The probe compensation lugs connect to the calibrator output on the backplane...

Страница 145: ...FPGA Hedwig Memory Controller Hedwig Memory Controller Acq FPGA Acq FPGA Hedwig Memory Controller Hedwig Memory Controller Config PROM Philips PX 1011A Misc I Cs SATA Conn Backplane Board Acq board A...

Страница 146: ...146 Figure 7 6 Acquisition board block diagram...

Страница 147: ...y that the ground protection is impaired you must make the instrument inoperative and secure it against any unintended opera tion Service instructions are for trained service personnel To avoid danger...

Страница 148: ...Warranty The material contained in this document is provided as is and is subject to being changed without notice in future editions Further to the maximum extent permitted by applica ble law Agilent...

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