To remove and replace the motherboard | Agilent Technologies 46A

Chapter 6: Replacing Assemblies

To remove and replace the motherboard

13Once the WINBIOS has been configured, cycle power to start the Windows ’95 operating system and begin the plug-and-play driver installation. Note the following:

•Expect several iterations of the plug-and-play recognition and driver installation. Use the Windows '95 drivers when available.

•Obtain the 548xx driver disk by contacting the Agilent factory. When Windows '95 finds "Unknown PCI card" and displays the message "Insert Agilent Technologies 548XX Scope Installation Disk", insert the floppy disk, select drive A:, and click OK to load the oscilloscope driver.

•The instrument will reboot several times to recognize all of the hardware.

14Run the self-test to verify the instrument is operating properly. See "Self-Test Verification" in chapter 3.

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Agilent Technologies 46A, 45A, 54835A manual To remove and replace the motherboard

Contents

Agilent Model 54835A/45A/46A Oscilloscopes Trigger setup controls set mode and basic parameters Service PolicyEase of use with high performance Display shows waveforms and graphical user interface Power Measurements This Book Contents Contents No Display Trouble IsolationTo check the keyboard To check the LEDs To remove and replace the backlight inverter board Replaceable Parts To remove and replace the floppy disk drive General Information Oscilloscopes Covered by this Service Guide Instruments covered by this service guideModel Description Accessories supplied Accessories supplied Options available Options availableOption Number Description Accessories available Accessories availableRequired when using 2 or more Agilent 1144A active probes Agilent 1144A MHz Active Probe Agilent Specifications & characteristics Specifications & characteristicsAcquisition Specifications & characteristics Vertical Horizontal Offset AccuracyWhichever is larger Post-trigger Specifications & characteristics Trigger Specifications & characteristics Display Measurements Computer System/ Storage Video Output CAT I and CAT II DefinitionsRise Time figures are calculated from tr=.35/Bandwidth Agilent Technologies 54835A/45A/46A general characteristics Agilent Technologies 54835A/45A/46A general characteristicsGeneral Characteristics Agilent Technologies 54835A/45A/46A general characteristics Agilent Service software No substitution Recommended test equipmentRecommended test equipment Agilent EPM Sensor 441A/Agilent 8482A Preparing for Use Preparing for Use To inspect the instrument To inspect the instrument To connect power To connect powerThree-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 probes To connect a printer To connect a printer To 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 viewing To power on the oscilloscope To power on the oscilloscopeYou Can Configure the Backlight Saver Press the Default Setup key on the front panel Graphical Interface Enable ButtonTo verify basic oscilloscope operation Press the Autoscale key on the front panel To clean the display monitor contrast filter To clean the instrumentTo clean the instrument Testing Performance Test Interval Dependencies See Also Clear Display Let the Instrument Warm Up Before TestingAveraging Enable the graphical interface ProcedureTo test the dc calibrator Connect the multimeter to the front panel Aux Out BNC Set Aux Output to DC Set the output voltage If the test failsSelecting DC in the Calibration Dialog Input Resistance Equipment Setup To test input resistanceTo test input resistance 25% accuracy Cables Specification To test voltage measurement accuracyConnect the equipment To test voltage measurement accuracy Acquisition Setup for Voltage Accuracy Measurement Voltage Measurement Accuracy Equipment SetupUse the following table for steps 8 through Select Channel 1 as the source for the Vavg measurement Scale Offset Supply Tolerance LimitsSource Selection for Vavg Measurement To Set Vertical Scale and Position Set the scale from the table Set the offset from the table To test offset accuracy Use the following table for steps 6 throughTo test offset accuracy Volts/div Position Supply Tolerance Limits To test offset accuracy Specification Equivalent Time To test bandwidthReal Time Equivalent Time Test Select Vamptd from the Voltage submenu of the Measure menu Calculate the response using the formulaDisplayed. Note the Vamptd1 reading Real Time Test MΩ, 500 MHz Test on 54835A, 54845A, and 54846A Equivalent Time Mode Procedure To test time measurement accuracyTo test time measurement accuracy Equivalent Time ≥16 averages Horizontal Setup for Equivalent Time Procedure Waveform for Time Measurement Accuracy Check Acquisition Setup for Equivalent Time Procedure Source Selection for Delta Time Measurement Measurement Settings for Time Interval Measurement For valid statistical data New Measurement Settings for Delta Time Measurement Real-Time Mode Procedure Measurement Definitions for Real Mode Procedure Click Close Acquisition Setup for Trigger Sensitivity Test To test trigger sensitivitySet horizontal time/div to 5 ns/div To test trigger sensitivity Setting the Markers for a 0.5 Division Reference Turn on Channel 1 and turn off all other channels Procedure-Auxiliary Trigger Test If a test failsPage Agilent Technologies 54835A/45A/46A Oscilloscope Test Limits Results Vmax Vmin/5 =Amplitude Input Channel Chan 4/Ext Resistance Voltage Scale Coupling Supply Limits Channel Realtime Channel 4 GSa/s Channel 8 GSa/sChannel 2 GSa/s ∆Time edge#101 Limits Calibrating and Adjusting Calibrating and Adjusting Let the Oscilloscope Warm Up Before Adjusting Loading New Software To check the power supply Disconnect the oscilloscope power cord and remove the coverTo check the power supply Equipment Critical Specifications Recommended Model/Part Power Supply Voltage Limits Supply Voltage Specification Limits Equipment Required Flat-Panel Display Specifications When to Use this ProcedureTo check the flat panel display FPD To check the flat panel display FPD Click Start Starting the Screen Test Repeat steps 6 and 7 for all colors Screen Test To run the self calibration To run the self calibrationSelf calibration Calibration time Click Start, then follow the instructions on the screen Clear Cal Memory Protect to Run self calibrationIf calibration fails Click here to start calibrationPage Troubleshooting Troubleshooting To install the fan safety shield Disconnect the instrument power cord and remove the coverTo install the fan safety shield Installing the Fan Safety Shield To troubleshoot the instrument To troubleshoot the instrument Primary Trouble Isolation Flowchart Primary Trouble Isolation Perform power-up Power-on Display Default Graphical Interface DisabledPrimary Trouble Isolation Check the display Check the front panel Run oscilloscope self-testsRun the Knob and Key selftest and the LED selftest No Display Trouble Isolation Flowchart Remove the cabinet and install the fan safety shield No Display Trouble IsolationCheck the fan connections Sequence Power-on Power supply indicator Isolation flowchartCompleted its power-on test LEDs do not come on, Configure the motherboard Power to the instrument. Solenoids are preset Normal operating patternNot, the problem may be with Board video signals Power Supply Trouble Isolation Flowchart Power Supply Trouble Isolation Check the power supply voltagesPower Supply Trouble Isolation Approximate Resistance Values, Each Power Supply to Ground Replace any shorted assembly Override the Remote Inhibit signalPower Supply Distribution Power-up Sense Resistor Connection Replace the power supply Routing of +15 V Bias and Remote Inhibit SignalsCheck +15 V Bias and Remote Inhibit cabling Check for the oscilloscope display onscreen To check probe power outputs To check probe power outputsPin Supply +3V Offset Data Probe ID Ring Clk +12 When you are finished, click Close Test ProcedureTo check the keyboard To check the keyboard Troubleshooting Procedure Re-assemble the instrument To check the LEDs To check the LEDsTest by Rows LED Test Screen When you are finished, click Close To check the motherboard, CPU, and RAM To check the motherboard, CPU, and RAMMessages Vary Slightly To check the Svga display board video signals To check the Svga display board video signalsSignal Video Signals To check the backlight inverter voltages To check the backlight inverter voltagesBacklight Inverter Board Input Voltages Input Pin # Backlight OFF Backlight on Post Code Listing AMI Motherboard only Post Code Listing AMI Motherboard onlyPost Code Listing Checkpoint Code Description Keyboard BAT command is issued Unblocking commandColor settings next Next Clearing the memory below 1 MB for the soft reset next 2EhDisplay memory read/write test next 2Fh Keyboard reset command next Command nextWinbios Setup next After Winbios Setup next 9Bh Coprocessor text next9Ch 9Dh To configure the motherboard jumpers and set up the Bios To configure the motherboard jumpers and set up the BiosMotherboard / floppy drive configurations Bios setup To configure the motherboard jumpers and set up the Bios Agilent Technologies Service Note Describes Upgrade Details To configure the motherboard jumpers and set up the Bios Configuring the AMI Series 727 Motherboard Jumpers J46J37, J39 Series 727 Motherboard Jumpers J2J21 J11 J12 MHz Clock Is RequiredJ25J24 J37 Press F1 to run the Winbios setup To configure the AMI Series 727 Winbios Parameters Do the following within the setup program Winbios Keyboard CommandsSystem Keyboard Absent Do steps h-l only if Your System has 64 Mb RAM Exit the Setup program, saving the changes you made Configuration Item SettingLoad Optimal Defaults Primary Configuring the AMI Series 757 Motherboard for 200 MHz CPU Series 757 Rev C Motherboard Jumpers Pin Do not Press F2 When to Do this Procedure Series 757 System Bios Settings with 1.44 Mbyte floppy drive Configuring the AMI Series 757 Motherboard for 300 MHz CPU Series 757 Rev D Motherboard Jumpers J14 J16 AMI Atlas-III PCI/ISA Do the following within the setup program Series 757 System Bios Settings with 120 Mbyte floppy drive FIC VA-503A Motherboard Core S1-1 S1-2 S1-3 S1-4Off Ratio S2-1 S2-2 Under the Power Management Setup, change these settings Under the PnP/PCI Configuration, change these settings Under Integrated Peripherals, change these settings Isolating Acquisition ProblemsTo troubleshoot the acquisition system To troubleshoot the acquisition system Acquisition Trouble Isolation 1 Acquisition Trouble Isolation 2 Acquisition Trouble Isolation 3 Return the Known Good Attenuator to Original Channel To D Converter FailedAcquisition Trouble Isolation 4 Temperature Sense failed Fiso failedProbe Board failed Offset DAC failed Scroll Mode Counter failed Timer failedInterpolator failed Timebase failed To troubleshoot attenuator failures To troubleshoot attenuator failuresAttenuator Click Test Swapping Attenuators Repeat steps 1 through 3 for the remaining input channelsAttenuator Connectivity Test Attenuator Assembly Troubleshooting Enable the Graphical Interface Software RevisionsSelect About Infiniium... from the Help Menu Software RevisionsPage Replacing Assemblies Replacing Assemblies Remove all accessories from the instrument To return the instrument to Agilent Technologies for service To remove and replace the cover To remove and replace the coverCover Fasteners To disconnect and connect Mylar flex cables To disconnect and connect Mylar flex cablesTo disconnect the cable To reconnect the cable To remove and replace the AutoProbe assembly Disconnect the power cable and remove the coverTo remove and replace the AutoProbe assembly Disconnecting W13 Avoid Damage to the Ribbon Cable and Faceplate Pushing Out the AutoProbe Faceplate To remove and replace the probe power and control assembly To remove and replace the probe power and control assemblyRemoving the Probe Power and Control Assembly Avoid Interference with the Fan To remove and replace the front panel assembly To remove and replace the backlight inverter boardTo remove and replace the backlight inverter board Removing the Backlight Inverter Board SMB Cable W18 and Comp Wire W19 To remove and replace the front panel assemblyRemoving the BNC Nuts Disconnecting W16, W20, and the Backlight Cables Front Panel Side Screws Keep Long Screws Separate for Re-assembly Front Panel Cover Plate Screws Removing the Cursor Keyboard Removing the backlights To remove and replace the acquisition board assembly To remove and replace the acquisition board assemblyRemoving the Acquisition Assembly To replace the board, reverse the removal procedure To remove and replace the LAN interface boardTo remove and replace the LAN interface board Removing the LAN Interface Board To remove and replace the Gpib interface board To remove and replace the Gpib interface boardRemoving the Gpib Interface Board Disconnect these cables from the Svga display board Removing the Scope Interface and Svga Display Boards To separate the scope interface board and Svga display board To separate the scope interface board and Svga display board To remove and replace the Option 200 sound card To replace the card, reverse the removal procedureTo remove and replace the Option 200 sound card To remove and replace the hard disk drive To remove and replace the hard disk driveRemoving the Hard Disk Drive To remove and replace the floppy disk drive To remove and replace the motherboardTo remove and replace the floppy disk drive Removing the Floppy Disk Drive Screws To remove and replace the motherboard Disconnect these cables from the motherboardRemoving the Motherboard Torx Screws To remove and replace the motherboard To remove and replace the power supply To remove and replace the power supplyRemoving Power Supply Cables To install the fan, reverse this procedure To remove and replace the fanTo remove and replace the fan Removing Fan Fasteners To remove and replace the CPU To remove and replace the CPURemoving the CPU To remove and replace RAM SIMMs or Sdram DIMMs To remove and replace RAM SIMMs or Sdram DIMMsRemoving and replacing SIMMs on the AMI motherboard Removing RAM SIMMs To remove and replace an attenuator To remove and replace an attenuatorDo Not Remove the Attenuators from the Acquisition Board If You Permanently Replace Parts Removing an Attenuator To reset the attenuator contact counter To reset the attenuator contact counterSelf Test Attenuator Channel box, select the channel you are changing Attenuator Relay Actuations SetupRepeat for each channel you need to change To remove and replace an acquisition hybrid To remove and replace an acquisition hybridTo remove the acquisition hybrid To replace the acquisition hybrid Do not USE Excessive Force Hybrid Connector Removing the Hybrid Connector Replaceable Parts Ordering Replaceable Parts Listed PartsUnlisted Parts Direct Mail Order System Power Cables and Plug Configurations Power Cables and Plug ConfigurationsPlug Type Cable Plug Description Length Color Country In/cm Exploded Views Exploded ViewsMP61 MP17 MP62 or MP63 MP15 and MP49 Front Frame and Front Panel Fan and Acquisition Assembly A10 MP57 Power Supply and PC MotherboardH12 H24 H25 MP55 MP60 H11 Exploded Views A4A1W24/25 A4A4 Exploded Views Exploded Views W17W20 A15 W14 W11 A19 W16 A14 W24/25 W27 W22 A4A1 FIC VA-503A Motherboard for PC Motherboard ConfigurationH23 A4A2 Exploded Views Sleeve and Accessory Pouch MP14 MP52 MP70 MP72MP12 H10 MP20 MP13 H19 H26 MP19 Attenuator Assembly Replaceable Parts List Replaceable Parts List Agilent Part Des Number QTY DRAM-SIMM 2MX32 8 MB Simm DRAM-DIMM 16MX32 64 MB Dimm Fans Cables Display BD. Jumper Page Theory of Operation Theory of Operation FPD Monitor Assembly Power Supply AssemblyBlock-Level Theory Acquisition System Front PanelDisk Drives Attenuators Svga Display Card Probe Power and ControlGpib Interface Card Acquisition Block Diagram Attenuator Theory Acquisition TheoryAttenuator Theory Acquisition Board Acquisition Theory Acquisition Modes Scope Interface BoardPage Manufacturer’s Address Manufacturer’s NameSupplementary Information Product Regulations Restricted Rights Legend Product Warranty