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Agilent Technologies 46A, 45A To replace the front panel assembly, reverse the above procedure

Models: 54835A 46A 45A

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9To replace the front panel assembly, reverse the above procedure.

Chapter 6: Replacing Assemblies

To remove and replace the front panel assembly

Figure 6-11

Disconnecting W16, W20, and the Backlight Cables

6Remove the 4 Torx T15 screws that secure the chassis sides to the front panel assembly.

Figure 6-12

Front Panel Side Screws

7Remove the 2 Torx T10 screws that secure the chassis front to the front panel assembly.

8Pull the front panel assembly away from the chassis, being careful to feed the ribbon cables W16 and W20 out through the slot in the front of the chassis.

9To replace the front panel assembly, reverse the above procedure.

Ensure that you observe polarity designations when reconnecting the ribbon cables.

6–11

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Agilent Technologies 46A, 45A, 54835A manual To replace the front panel assembly, reverse the above procedure

Contents

Service Guide Agilent Model 54835A/45A/46A OscilloscopesTrigger setup controls set mode and basic parameters Service PolicyGlance Ease of use with high performancePower Trigger Setup Auxiliary Trigger InputDisplay and Graphical Interface HorizontalIn This Book Contents Contents 1 General Information3 Testing Performance 4 Calibrating and Adjusting5 Troubleshooting 6 Replacing Assemblies7 Replaceable Parts 8 Theory of OperationGeneral Information General Information Instruments covered by this service guideOscilloscopes Covered by this Service Guide Accessories supplied Accessories suppliedUsers Quick Start Guide Programmer’s Guide and Programmer’s Quick ReferenceOptions available Options availableAccessories available Accessories availableChapter 1 General Information Accessories available Service Kit includes service software and fan safety shieldFan Safety Shield clips onto side of chassis with cover removed Chapter 1 General InformationSpecifications & characteristics Specifications & characteristicsChapter 1 General Information AcquisitionSpecifications & characteristics Vertical Agilent 54835A - 500 MHz 4-channel modeAgilent 54845A - 1.5 GHz 2-channel mode Agilent 54845A - 1.0 GHz 4-channel modeSpecifications & characteristics Chapter 1 General InformationHorizontal 0 to -1 s or one full screen widthSpecifications & characteristics Trigger Chapter 1 General InformationChapter 1 General Information Specifications & characteristics DisplayMeasurements Chapter 1 General Information Specifications & characteristics FFTComputer System/ Storage Specifications & characteristics Chapter 1 General InformationCAT I and CAT II Definitions 1-13Agilent Technologies 54835A/45A/46A general characteristics Agilent Technologies 54835A/45A/46A general characteristicsGeneral Characteristics Chapter 1 General InformationAgilent Technologies 54835A/45A/46A general characteristics Chapter 1 General InformationRecommended test equipment Chapter 1 General InformationRecommended test equipment Recommended Test EquipmentPreparing for Use Preparing for Use Setting Up the Oscilloscope To inspect the instrumentTo inspect the instrument To connect power To connect powerA Three-wire Power Cable is Provided To attach the optional trackball To connect the mouse or other pointing deviceTo connect the mouse or other pointing device To attach the optional trackball To connect to the LAN card To connect the keyboardTo connect the keyboard To connect oscilloscope probes To connect oscilloscope probesTo connect a printer To connect a printerTo connect the GPIB cable To connect an external monitorTo connect an external monitor To tilt the oscilloscope upward for easier viewing To tilt the oscilloscope upward for easier viewingTo power on the oscilloscope To power on the oscilloscopeYou Can Configure the Backlight Saver To verify basic oscilloscope operation 3 Press the Default Setup key on the front panel1 Connect an oscilloscope probe to channel 4 Press the Autoscale key on the front panelTo clean the instrument To clean the display monitor contrast filterTo clean the instrument Chapter 2 Preparing for UseSpecifications Testing PerformanceTo test the dc calibrator Testing Performance Testing IntervalEquipment Required Self-Test VerificationSpecifications Performance Test ProceduresTest Record Operating HintsTo test the dc calibrator 2 Enable the graphical interface3 Press Default Setup to set the oscilloscope to default conditions 1 Connect the multimeter to the front panel Aux Out BNC9 The DVM should read near -2.500 V. Record the reading. V2 = To test input resistance To test voltage measurement accuracy 1 Connect the equipmentTo test voltage measurement accuracy Equipment Required2 Press Default Setup to set the oscilloscope to default conditions 9 Select Channel 1 from the Setup menu 16 With the channel keys, set the active channel OFF and the next ON To test offset accuracy 2 Press Default Setup to set the oscilloscope to default conditions3 Select Acquisition from the Setup menu 6 Select Channel 1 from the Setup menu11 Repeat steps 6 through 10 for the other lines in the table To test bandwidth Specification Equivalent TimeTo test bandwidth Real Timeresponse dB = 20log487 mV = 20log 10 0.871 = -1.19dB20 Select Acquisition from the Setup menu To test time measurement accuracy 10 Select Acquisition from the Setup menu Acquisition Setup for Equivalent Time Procedure Source Selection for Delta Time Measurement16 Change the signal generator frequency to 100 MHz 10 ns period New Measurement Settings for Delta Time Measurement 2 Select Acquisition from the Setup menu 7 Clear measurements To test trigger sensitivity 1 Press Default Setup 2 Select Acquisition from the Setup menuChapter 3 Testing Performance 4 Set horizontal time/div to 5 ns/div5 Turn on Channel 1 and turn off all other channels 17 Adjust the horizontal sweep speed to 1 ns/div Page Agilent Technologies Performance Test Record394.922 to 395.078 ns Agilent 54845A/46A 395 ns ± 53 ps394.947 to 395.053 ns 300 mVpp at 500 MHzCalibrating and Adjusting To check the power supplyEquipment Required Operating HintsCalibrating and Adjusting Self Calibration Interval and Hardware AdjustmentsMainframe Cal Factor Memory Error Equipment RequiredLoading Default Oscilloscope Settings Calibration ProceduresLoading New Software Chapter 4 Calibrating and AdjustingTo check the power supply Chapter 4 Calibrating and AdjustingTo check the power supply Refer to the following figure for testpoint locationsConnect the common lead of the voltmeter to the GND test point To check the 715 Hz auxiliary output probe compensation squarewave To check the flat panel display FPD Chapter 4 Calibrating and AdjustingFlat-Panel Display Specifications When to Use this Procedure5 Click Start Chapter 4 Calibrating and AdjustingTo check the flat panel display FPD 8 Repeat steps 6 and 7 for all colors 6 Select a color by clicking the radio button for that colorTo check the flat panel display FPD To run the self calibration To run the self calibrationEquipment Required Let the Oscilloscope Warm Up Before Running the Self Calibration4 Click Start, then follow the instructions on the screen To run the self calibrationClear Cal Memory Protect to Run self calibration If calibration failsPage Troubleshooting Troubleshooting SafetyESD Precautions Tools RequiredTo install the fan safety shield Default SetupTo troubleshoot the instrument To troubleshoot the instrumentChapter 5 Troubleshooting TroubleshootingTroubleshooting To troubleshoot the instrumentPrimary Trouble Isolation A Perform power-upB Check the display Primary Trouble IsolationC Run oscilloscope self-tests D Check the front panelE Run the Knob and Key selftest and the LED selftest Primary Trouble IsolationChapter 5 Troubleshooting No Display Trouble Isolation ChartCheck fan connections and power-on Power-upNo Display Trouble Isolation A Remove the cabinet and install the fan safety shieldB Check the fan connections sequenceChapter 5 Troubleshooting Power-On Sequence with External Monitor ConnectedPower-on No Display Trouble IsolationNo Display Trouble Isolation Chapter 5 TroubleshootingPOST memory test message Power Supply Trouble Isolation Flowchart Chapter 5 TroubleshootingNo Display Trouble Isolation Power Supply Trouble Isolation A Check the power supply voltagesPower Supply Trouble Isolation Power Supply Voltage LimitsC Replace any shorted assembly D Override the Remote Inhibit signalPower Supply Trouble Isolation Reconnect Assemblies and CablesF Replace the power supply Power Supply Trouble IsolationE Check +15 V Bias and Remote Inhibit cabling G Check for the oscilloscope display onscreenTo check probe power outputs To check probe power outputsTo check the keyboard To check the keyboard1 Disconnect the power cord and remove the cover To check the LEDs To check the LEDsTest by Rows 5 When you are finished, click Close To check the LEDsTo check the motherboard, CPU, and RAM To check the SVGA display board video signals To check the SVGA display board video signalsTo check the backlight inverter voltages To check the backlight inverter voltagesPOST Code Listing AMI Motherboard only Chapter 5 TroubleshootingPOST Code Listing AMI Motherboard only POST Code ListingPOST Code Listing AMI Motherboard only Chapter 5 TroubleshootingUncompressed Initialization Codes POST Code Listing AMI Motherboard only Chapter 5 TroubleshootingCompleted post-video ROM test processing. If the EGA/VGA controller is not found, performing POST Code Listing AMI Motherboard only Chapter 5 TroubleshootingThe memory size was adjusting for relocation and shadowing. Clearing the Hit message next POST Code Listing AMI Motherboard only Chapter 5 TroubleshootingRequired initialization before the Coprocessor test is over. Initializing the Coprocessor next To configure the motherboard jumpers and set up the BIOS To configure the motherboard jumpers and set up the BIOSTo configure the motherboard jumpers and set up the BIOS 5-30Agilent Technologies Service Note Describes Upgrade Details To configure the motherboard jumpers and set up the BIOSChapter 5 Troubleshooting To configure the motherboard jumpers and set up the BIOSConfiguring the AMI Series 727 Motherboard Jumpers Series 727 Motherboard JumpersAVOID DAMAGE TO THE CPU BY CORRECTLY CONFIGURING THE JUMPERS fan will cause the CPU to overheat and malfunctionA 100-MHz Clock Is Required 5-331 Connect the power cable to the oscilloscope 5 Press F1 to run the WINBIOS setupTo configure the motherboard jumpers and set up the BIOS To configure the AMI Series 727 WINBIOS Parameters6 Do the following within the setup program WINBIOS Keyboard CommandsSystem Keyboard Absent Do steps h-l ONLY if Your System has 64 Mb RAM7 Exit the Setup program, saving the changes you made Chapter 5 TroubleshootingTo configure the motherboard jumpers and set up the BIOS Series 727 System Configuration SettingsChapter 5 Troubleshooting Configuring the AMI Series 757 Motherboard for 200 MHz CPUVRM Connector J5, J6, J7, J8To configure the jumpers, set J5, J6, J7, J8, and J14 as shown in the following figure. Note that the pairs of pins on J6 and J7 are shorted the pairs of pins on J5 and J8 are open and all pins on J14 are open AMI Atlas-III PCI/ISA BIOS Release AMD-K6tm-/200 Checking NVRAM XXXXXX KB OK WAIT INS Pressed RUN SETUP Press F1 to Run SETUPPress F2 to load default values and continue Messages Vary Slightly6 Do the following within the setup program To configure the motherboard jumpers and set up the BIOSWINBIOS Keyboard Commands When to Do this Procedurec Exit the BIOS Setup and save the changes you made To configure the motherboard jumpers and set up the BIOSSeries 757 System BIOS Settings with 1.44 Mbyte floppy drive Chapter 5 Troubleshooting To configure the motherboard jumpers and set up the BIOSConfiguring the AMI Series 757 Motherboard for 300 MHz CPU Series 757 Rev D Motherboard JumpersThe jumpers you must check are J5, J6, J7, J8, J14, J15 and J16. You must also install a 2.2 1 Connect the power cable to the oscilloscope 5 Press F1 to run the WINBIOS setupTo configure the motherboard jumpers and set up the BIOS 3 Connect an external keyboard and a mouse to the oscilloscopec Under Standard Setup, select Floppy A. Select Not Installed. Exit the Floppy A block. d Under Standard Setup, select Floppy B. Select Not Installed. Exit the Floppy B block WINBIOS Keyboard CommandsSystem Keyboard Absent To configure the motherboard jumpers and set up the BIOS Series 757 System BIOS Settings with 120 Mbyte floppy drive1 Set the PWR Power supply type select jumper to To configure the motherboard jumpers and set up the BIOSUse this procedure to set the FIC VA-503A motherboard BIOS To Configure the FIC Series VA-503A Motherboard BIOS Parameters5-48 To troubleshoot the acquisition system To troubleshoot the acquisition systemTo troubleshoot the acquisition system Chapter 5 TroubleshootingAcquisition Trouble Isolation 1 of To troubleshoot the acquisition system Chapter 5 TroubleshootingAcquisition Trouble Isolation 2 of To troubleshoot the acquisition system Chapter 5 TroubleshootingAcquisition Trouble Isolation 3 of To troubleshoot the acquisition system A A to D Converter FailedReturn the Known Good Attenuator to Original Channel E Temperature Sense failed B FISO failedC Probe Board failed D Offset DAC failedK Interpolator failed To troubleshoot attenuator failures To troubleshoot attenuator failures2 Press the Default Setup key, then the Autoscale key 4 Repeat steps 1 through 3 for the remaining input channelsTo troubleshoot attenuator failures Swapping AttenuatorsChapter 5 Troubleshooting To troubleshoot attenuator failuresSoftware Revisions Enable the Graphical InterfaceSelect About Infiniium... from the Help Menu Software RevisionsPage Replacing Assemblies ESD Precautions Replacing AssembliesTools Required To return the instrument to Agilent Technologies for service 2 Remove all accessories from the instrument3 Protect the instrument by wrapping it in plastic or heavy paper 5 Seal the shipping container securelyTo remove and replace the cover To disconnect and connect Mylar flex cables 1 Disconnect the power cable and remove the cover To remove and replace the AutoProbe assemblyTo remove and replace the AutoProbe assembly To remove and replace the AutoProbe assembly 3 To replace the AutoProbe assembly, reverse the above procedureAVOID DAMAGE TO THE RIBBON CABLE AND FACEPLATE To remove and replace the probe power and control assembly To remove and replace the probe power and control assemblyAvoid Interference with the Fan To remove and replace the backlight inverter board To remove and replace the front panel assemblyTo remove and replace the backlight inverter board To remove and replace the front panel assembly 6-109 To replace the front panel assembly, reverse the above procedure Keep Long Screws Separate for Re-assembly To remove and replace the keyboard and flat-panel display assembliesTo remove and replace the keyboard and flat-panel display assemblies prevent cleaner from corroding FPD connections PREVENT GLASS BREAKAGE6-13 To remove and replace the keyboard and flat-panel display assembliesTo remove and replace the acquisition board assembly To remove and replace the acquisition board assemblyChapter 6 Replacing Assemblies To remove and replace the LAN interface boardTo remove and replace the LAN interface board To remove and replace the GPIB interface board To remove and replace the GPIB interface boardAcquisition cable W11 Keyboard cable W16 To separate the scope interface board and SVGA display board To remove and replace the Option 200 sound card To remove and replace the Option 200 sound cardTo remove and replace the hard disk drive To remove and replace the hard disk driveTo remove and replace the motherboard To remove and replace the floppy disk driveTo remove and replace the floppy disk drive 7 Disconnect these cables from the motherboard To remove and replace the motherboard 6-23To remove and replace the power supply To remove and replace the power supplyTo remove and replace the fan To remove and replace the fanTo remove and replace the CPU To remove and replace the CPUTo remove and replace RAM SIMMs or SDRAM DIMMs To remove and replace RAM SIMMs or SDRAM DIMMsTo remove and replace an attenuator To remove and replace an attenuatorDo Not Remove the Attenuators from the Acquisition Board Chapter 6 Replacing Assemblies To remove and replace an attenuatorIf You Permanently Replace Parts Removing an AttenuatorTo reset the attenuator contact counter To reset the attenuator contact counter 11 In the Attenuator Channel box, select the channel you are changing13 Repeat for each channel you need to change Chapter 6 Replacing AssembliesTo remove and replace an acquisition hybrid To remove and replace an acquisition hybrid4 Loosely install the two M2 pan-head screws 2 Follow the procedure for removing the hybrid 3 Remove the two screws to remove the connectorThe Hybrid Connector 1 Remove the acquisition board from the instrumentReplaceable Parts Ordering Replaceable Parts Listed Parts Unlisted PartsPower Cables and Plug Configurations Exploded Views Replaceable Parts ListReplaceable Parts Ordering Replaceable PartsPower Cables and Plug Configurations Power Cables and Plug ConfigurationsPower Cables and Plug Configurations Chapter 7 Replaceable PartsChapter 7 Replaceable Parts Exploded ViewsExploded Views Chapter 7 Replaceable Parts Fan and Acquisition AssemblyExploded Views Chapter 7 Replaceable Parts Power Supply and PC MotherboardExploded Views Chapter 7 Replaceable Parts Exploded ViewsChapter 7 Replaceable Parts Exploded ViewsChapter 7 Replaceable Parts Exploded ViewsChapter 7 Replaceable Parts 120 Mbyte Floppy Drive Configuration for PC Motherboard ConfigurationExploded Views FIC VA-503A Motherboard for PC Motherboard Configuration Chapter 7 Replaceable PartsExploded Views W17W20 A15 W14 A5 W11 A19Chapter 7 Replaceable Parts Exploded ViewsSleeve and Accessory Pouch Chapter 7 Replaceable PartsExploded Views Old versionChapter 7 Replaceable Parts Attenuator AssemblyExploded Views Replaceable Parts List Replaceable Parts ListReplaceable Parts List Replaceable Parts Chapter 7 Replaceable PartsExchange Assemblies External Chassis PartsChapter 7 Replaceable Parts Replaceable Parts List Replaceable PartsDescription Replaceable Parts List Replaceable Parts Adapter board w/ 4 connectors - 120 MB drive to ribbon cablesChassis assembly compatible w/FIC motherboard configuration Chapter 7 Replaceable PartsReplaceable Parts List Replaceable Parts All ConfigurationsPROBE I/O ASSEMBLY older style consists of MP16, MP54, and W13 Chapter 7 Replaceable PartsReplaceable Parts List Replaceable Parts INSULATOR-120 Mbyte FLOPPY DRIVE only on upgraded unitsChapter 7 Replaceable Parts CablesReplaceable Parts List Replaceable Parts ACQUISITION CABLE w/ AMP-LATCHr connector on each endACQUISITION CABLE w/ AMP-LATCHr connector on one end Chapter 7 Replaceable PartsPage Theory of Operation Block-Level Theory Power Supply Assembly FPD Monitor AssemblySVGA Display Card GPIB Interface Card Probe Power and Control Acquisition System Front Panel Disk Drives Attenuators MotherboardChapter 8 Theory of Operation Theory of Operation Block-Level TheoryBlock-Level Theory Acquisition SystemFront Panel Disk DrivesProbe Power and Control Block-Level TheorySVGA Display Card GPIB Interface CardAcquisition Block Diagram Chapter 8 Theory of OperationBlock-Level Theory TIME BASEAcquisition Theory Attenuator TheoryAttenuator Theory Acquisition Theory Acquisition Modes Acquisition TheoryScope Interface Board Page Safety DECLARATION OF CONFORMITYProduct Name Model NumbersSafety Product RegulationsEmissions ImmunityDocument Warranty SafetySafety Symbols Hazardous voltage symbolProduct Warranty Limitation of WarrantyExclusive Remedies Assistance