Removing the system board | Agilent Technologies 54624A, 54621D

Replacing Assemblies

To remove the system board

7Lift the back of the board to clear the main deck and then pull the board straight out.

Figure 6-8

Removing the system board

6-11

Image 95

Agilent Technologies 54624A, 54621D, 54622D, 54622A, 54621A manual Removing the system board

Contents

Agilent 54621D/22D Mixed-Signal Oscilloscope Utilities Display shows current input signalsHorizontal Controls select sweep speed and delay parameters Softkeys extend the functionality of command keys This Book Contents Contents Solving General Problems with the OscilloscopesTroubleshooting the Oscilloscope General Information General Information To inspect package contents General Information Package contents for 54620-Series Oscilloscopes Option Description To inspect options and accessories Model Description Accessories available Plug Type Cable Part Number Power Cords Acquisition Digital Channels on 54621D and 54622D only Performance CharacteristicsAcquisition Analog Channels Probe ID Agilent/HP Auto probe sense Tek Compatible Vertical System Analog Channels Accuracy = ±2.0%80 mV + 0.4%80 mV = ±1.92 mV Vertical System Digital Channels 54621D and 54622D only Sample rate of 200/400 MSa/s Horizontal Can Trigger System External EXT Triggering Analog Channel TriggeringDigital D15 D0 Channel Triggering 54621D and 5462 2D Display System Measurement Features Storage FFT Power Requirements General Characteristics Preparing the Oscilloscope for Use Preparing the Oscilloscope for Use Setting up the Oscilloscope To adjust the handle To adjust the handle To power-on the oscilloscope To power-on the oscilloscopePress the power switch Intensity control To adjust the display intensityTo adjust the display intensity Press Autoscale To connect the oscilloscope probesTo compensate your probe To connect the oscilloscope probes To use the digital probes mixed-signal oscilloscope only To use the digital probes mixed-signal oscilloscope only Grabber Signal Lead Ground Lead Grabber Signals Ground To connect a printer To connect a printerTo connect an RS-232 cable Verifying Basic Oscilloscope Operation To verify basic oscilloscope operationPress the Autoscale key on the front panel To verify basic oscilloscope operation Getting started using the oscilloscope interface To verify basic oscilloscope operation Using Quick Help Preparing the Oscilloscope for Use Loading a language from floppy disk Loading a language from floppy disk Disconnect power from the instrument Cleaning the oscilloscope Testing Performance If a performance test fails Testing Performance Part Number Equipment Critical SpecificationsList of Test Equipment List of Test Equipment Constructing the 8-by-2 Connector To construct the test connectorTo construct the test connector Materials Required to Construct the Test Connectors To test the 54621D/22D Oscilloscope digital channels To test the 54621D/22D Oscilloscope digital channelsPress the Autoscale key To verify digital channel threshold accuracy To verify digital channel threshold accuracy Method 1 Using the Test Connector Method 2 Using the Test Fixture Threshold voltage setting DC offset voltage setting Limits Threshold Accuracy Voltage Test Settings To verify voltage measurement accuracy Set up the oscilloscopeEquipment Critical Specifications Recommended Model/Part To verify voltage measurement accuracy MV/Div 616 mV 384 mV Settings Used to Verify Voltage Measurement Accuracy Use a Blocking Capacitor to Reduce Noise Using a Blocking Capacitor to Reduce Noise Equipment Required to Verify Bandwidth To verify bandwidthTo verify bandwidth Selected Channel 54621A/21D 54622A/22D 54624A Calculate the response using this formulaSignal Generator Frequency Setting Change the time base to 5 ns/div To verify horizontal Dt and 1/Dt accuracy To verify horizontal ∆t and 1/∆t accuracy 54621A and 54621D only Measure the following54622A/22D/24A only Equipment Required to Verify Trigger Sensitivity To verify trigger sensitivityTo verify trigger sensitivity Test Internal Trigger Sensitivity Test External Trigger Sensitivity Agilent 54622A/22D/24A Performance Test Record Agilent 54621A/54621D Agilent 54621A/21D Performance Test Record Calibrating and Adjusting Calibrating and Adjusting Hazardous Voltages Digital multimeter To adjust the power supplyPrepare the oscilloscope for the voltage adjustment To adjust the power supply Supply Voltage Tolerance Power Supply Voltage Tolerances +3.3V Adjustment To perform User Cal To perform User Cal Do not adjust Sub Bri or Cont controls To adjust the oscilloscope displayTo adjust the oscilloscope display When to Adjust the Oscilloscope Display 96,= Troubleshooting Read All Cautions and Warnings Troubleshooting If there is no trace display Solving General Problems with the Oscilloscopes If the trace display is unusual or unexpected If the trace display is unusual or unexpected If you cannot see a channel If you cannot see a channel Equipment Required to Troubleshoot the Oscilloscope Troubleshooting the Oscilloscope To construct your own dummy load Connector Load Amps Resistor WattsLocation of the Low Voltage Power Supply Connectors To construct your own dummy load To check out the oscilloscope Connect the power cord, then turn on the oscilloscopeTo check out the oscilloscope Signal Name Frequency Pulse Width Voltage Display Signals on the System Board All OscilloscopesLow Voltage Power Supply Tolerances Is the fan running? Location of the Fan Connector Low Voltage Power Supply Test Points To check the Low Voltage Power SupplyTo check the Low Voltage Power Supply Beware of Hazardous Voltages If the Fuse is Blown To run the internal self-tests To run the internal self-tests Replacing Assemblies Replacing Assemblies Avoid Electrical Shock Removing the cabinet To remove the cabinetTo remove the cabinet Removing the fan To remove the fanTo remove the fan Removing the floppy drive To remove the floppy driveTo remove the floppy drive Removing the intensity shaft and front panel To remove the front panelTo remove the front panel Removing the display To remove the displayTo remove the display Unhooking the power switch shaft Preparing to remove the system board To remove the system boardTo remove the system board Removing the system board Disconnecting ground wire and ribbon cable To remove the power supplyTo remove the power supply Unhooking the power switch shaft Removing the power supply Removing the keyboard assembly To remove the keyboard assemblyLift the keyboard assembly straight out To remove the keyboard assembly To remove the handle To remove the handle Replaceable Parts Replaceable Parts To order a replacement part To order a replacement part Exploded View of the 54621A/22A/24A/21D/22D Oscilloscope Reference Agilent Part Qty Description Designator Number To order a replacement part Replaceable Parts MP1 Input Cable 54621D/22D only Option Accessory pouch and front-panel coverProbes Model Numbers Manufacturer’s NameManufacturer’s Address Product Name Regulatory Information for Canada SafetyProduct Regulations Sound Pressure Level Safety Agilent Technologies, Inc Document Warranty