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Agilent Technologies 856290216 service manual Replacement

Models: 856290216

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Procedure 6. A6 Power Supply Assembly

15.Disconnect all cables from the A6 power supply assembly. See Figure 4-11.

16.Use a TORX screwdriver to remove the hardware from the shield wall, the heatsink, and the A6 power supply assembly.

17.Remove the A6 power supply assembly by lifting from the regulator heatsink toward front of spectrum analyzer.

Replacement

1.Ensure that the bottom shield wall is in place before replacing the A6 power supply assembly.

2.Attach the A6 power supply assembly to the spectrum analyzer chassis and top shield wall using the four screws.

3.Connect Wl to A6J1, W3 to A6J2, fan power wires to A6J3, W8 to A6J4, and the line-power jack to A6JlOl. See Figure 4-11.

4.Secure the A6Al high voltage assembly to the A6 power supply assembly, using three TORX screws. Connect ribbon cable A6AlWl to A6J5.

5..Snap post-accelerator cable A6AlW3 to the CRT assembly.

4-22 Assembly Replacement

Image 147

Agilent Technologies 856290216 service manual Replacement

Contents

About this Manual HP Part No -90218 Supersedes Fia HewlettPage Warranty CertificationRegulatory Information Assistance Safety NotesPrevent electrical shock, do not remove covers General Safety ConsiderationsHow to Use This Guide Documentation OutlineThis guide uses the following conventions Contents Contents-2 Contents-3 Contents-4 Contents-5 Contents-6 Contents-7 Controller Section Contents-9 Contents-10 Figures Contents-12 Contents-13 Contents-14 Tables Contents-15PLL Serial Numbers and Repair Information Serial Number Label ExampleGeneral Information l-1 A21 Ocxo Instrument VariationsTable l- 1. Instrument Variations General InformationGeneral Information l-3 HP 85629B Test and Adjustment ModuleService Kit Table l-2. Service Kit ContentsElectrostatic Discharge General Information l-5 Reducing Potential for ESD DamageStatic-Safe Accessories Returning Instruments for ServiceStatic-Safe Accessories Service TagOther Packaging 9211-6969 Outer Carton 9220-5073 Pads 9220-5072 Top Tray General Information l-9 Recommended Test EquipmentInstrument Sources Table l-4. Recommended Test EquipmentGeneral Information l-l Recommended Test EquipmentInstrument Critical Specifications Recommended Use Instrument Accessories PAV PAM Sales and Service Offices US Field Operations Hewlett-Packard Sales and Service OfficesIntroduction Adjustment ProceduresTest Equipment Safety ConsiderationsWhich Adjustments Should Be Performed? Adjustable and Factory-Selected ComponentsAdjustment Tools Instrument Service Position8710-0033 A5 if Related AdjustmentsA10 Rythm Adjustable Components VCO Range HV ADJFM Span Smpl MatchFactory Selected Components Adjustment Indicator Using the TAMYTO TAM AdjustmentsRequired Test Equipment for TAM Adjustment Procedures 2-lFront End Cal adjustment Related Performance Test High Voltage Power Supply AdjustmentAssembly Adjusted High Voltage Power Supply AdjustmentEquipment ProcedureDisplay Adjustment Display AdjustmentPreliminary Adjustments Cutoff AdjustmentDeflection Adjustments CRT Adjust Pattern Adjustment Procedures Intensity Adjustments A2 Display Adjustment Locations Fast Zero Span AdjustmentsPress SAVEI, Save State ,and State If Bandpass Adjustment If Bandpass AdjustmentTAM Connector Pin Locations LC Bandpass AdjustmentsFactory-Selected LC Filter Capacitors Xtal Bandpass AdjustmentsA5T202 Xtal CTR Factory-Selected Xtal Filter CapacitorsXtal Factory-Selected Capacitor Selection A5T200 Xtal CTRIf Bandpass Adjustment 10. Capacitor Part Numbers Related Performance Tests If Amplitude AdjustmentsIf Amplitude Adjustment Locations If Amplitude AdjustmentsA5 Reference Attenuator Adjustment A5 Adjustment Verification DC Log Adjustment Setup Adjustment Procedures DC Log Amplifier AdjustmentsDC Log Amplifier Adjustments A4 Limiter Phase AdjustmentLog Amplifier Adjustments A4 Linear Fidelity AdjustmentPress -,a, if AlI on OFF OFF, AD3 Curr if State A4 LOG Fidelity Adjustment11. Sampler Adjustment Setup Sampling Oscillator AdjustmentSampling Oscillator Adjustment Sampler Match AdjustmentSampling Oscillator Adjustment Sampling Oscillator Adjustment 1. Sampling Adjustments YTO Adjustment YTO Adjustment07SAVE Save STATE, State RECALL, Recall STATE, State YTO Main Coil Adjustments14. YTO Adjustment Locations YTO FM Coil Adjustments15. First LO Distribution Amplifier Adjustment Setup LO Distribution Amplifier Adjustment18. TAM Connector Pin Locations LO Distribution Amplifier AdjustmentDAC value for 4.60 GHz = Frequency Response Adjustment Automated Procedure AvailableFrequency Response Adjustment 17. Frequency Response Adjustment Setup MHz RF gain DAC value Frequency‘Response Adjustment Calibrator Amplitude Adjustment Calibrator Amplitude AdjustmentMHz Reference Adjustment-OCXO Non-Option 19 MHz Reference Adjustment Setup and Adjustment Location MHz Reference Adjustment-OCXO Non-OptionOFF MHz Reference Adjustment-TCXO Option MHz Reference Adjustment-TCXO OptionProcedure Demodulator Adjustment Demodulator AdjustmentSPAN, Zero Span 22. Demodulator Adjustment Locations Adjustment Procedures 23. External Mixer Bias Adjustment Setup External Mixer Bias Adjustment Non-OptionExternal Mixer Amplitude Adjustment Non-Option External Mixer Amplitude Adjustment Non-OptionSupplied with HP 8481D EXT MXR REF CAL 25. Rythm Adjustment Setup YIG-Tuned Filter/Mixer Rythm AdjustmentYIG-Tuned Filter/Mixer Rythm Adjustment Save Presel PK MHz PLL Adjustment MHz PLL Adjustment27 MHz PLL Adjustment Location MHz PLL Adjustment MHz Reference Adjustment Frequency Response Adjustment Software 3-l Frequency Response Adjustment SoftwareController Computer Frequency Response Adjustment SoftwareGetting Started Spectrum AnalyzersWarmup Time Test Equipment Warmup Spectrum Analyzer WarmupRequired Test Equipment Summary HP-IB Cables Computer Controller SetupAdjustment Setups Equipment ConnectionsUsing Frequency Response Adjustment Software Loading the ProgramProgram Operation System Mass Storage File Location Power SensorsConditions Menu Test Record Header InformationStoring and Loading the Conditions File Setting HP-IB AddressesQuerying the Spectrum Analyzer Serial Number Getting to the Adjust MenuExiting Frequency Response Adjustment Verifying the HP-IBSensor Utilities Menu Adding a Power Sensor Data FileAdjust Menu Calibrate Power Sensor Single TestList Equipment List Files Frequency Response Adjustment Menu SoftkeysSingle Test Cal Sensor List Equip Cond Menu Assemblies Adjusted APC 3.5 Cable 0 E’ Error Messages Beginning with Alphabetic Characters Frequency Response Adjustment Error MessagesNo HP-IB address listed for DUT Power meter reads value dBmFile filename not found Insufficient equip. to do test test number test nameError Messages Beginning with Numeric Characters Error Messages Beginning with Variables Assembly Replacement Assembly ReplacementAccess to Internal Assemblies Required Tools Cable Color CodeRemoval/Replacement Procedure I. Spectrum Analyzer CoverProcedure 2. Al Front Frame/Al8 CRT Procedure 2. Al Front Frame/Al8 CRTRemoval Procedure 2. Al Front Frame/Al8 CRT Instrument Discharging High Voltage on the CRT Assembly ReplacementA9, A18, and Line-Switch Assembly Mounting Screws Front frame Mounting Screws Installing the CRT and front frame Assemblies ReplacementPlacing the CRT into the Front Frame Assembly Replacement 4-lProcedure 2. Al Front Frame/Al8 CRT Procedure 3. AlAl Keyboard/Front Panel Keys Procedure 3. Al Al Keyboard/Front Panel KeysProcedure 4. AlA RPG Procedure 5. A2, A3, A4, and A5 Assemblies Procedure 5. A2, A3, A4, and A5 AssembliesAssembly Replacement 4 A2, A3, A4, and A5 Assembly Removal 4P3 Assembly Cables 2 Assembly Replacement Coaxial Cable Clip Procedure 5. A2, A3, A4, and AS Assemblies10. HP-IB and AlAl Wl Cable Placement Assembly Replacement Procedure 6. A6 Power Supply Assembly Procedure 6. A6 Power Supply AssemblyReplacement 1. A6 Power Supply Connections Assembly Replacement 12. Power Supply Cover Assembly Replacement Procedure 7. A6Al High Voltage Assembly Procedure 7. A6Al High Voltage Assembly13. Al6 Fast ADC and Al7 CRT Driver Mounting Screws Procedure 7. A6Al High Voltage Assembly Procedure 8. A7 through Al3 Assemblies 14. HP 6562E Assembly Locations Procedure 6. A7 through Al3 AssembliesA7 First LO Distribution Amplifier Assembly Replacement 4-3 A8 Low Band MixerA8 Low Band Mixer A9 Input Attenuator A9 Input Attenuator 16. A10 Mounting Screws A10 YIG-Tuned Filter/Mixer RythmAll YTO All YTOAl3 Second Converter Procedure 9. Al4 and A15 Assemblies Procedure 9. Al4 and Al5 AssembliesProcedure 9. Al4 and Al5 Assemblies 19. Al4 and Al5 Assembly Cables Assembly Replacement 20. Al6 and Al7 Mounting Screws Assembly Replacement Procedure 10. Al6 Fast ADC and Al7 CRT Driver21. Al6 Cable Routing Assembly Replacement Procedure 10. Al6 Fast ADC and Al7 CRT DriverProcedure 11. Bl Fan Procedure 12. ET1 Battery Procedure 12. BTI BatteryProcedure 13. Rear Frame/Rear Dress Panel 22. Main Deck Screws Procedure 13. Rear Frame/Rear Dress PanelW24, coax 5 W23, coax 23. A6 Power Supply Cover Assembly Replacement Personnel and damage to the instrument Procedure 14. W3 Line Switch Cable24. W3 Dress and Connection to A6 Power Supply Procedure 14. W3 Line Switch CableScrew Quantity Standoff 26. W3 Cable Connector Replacement Using Contact Removal Tool, HP part numberReplacement without Contact Removal Tool 27. Side Frame Mounting Screws Procedure 15. Eerom A2U500 Procedure 15. Eerom A2U50028. A21 Ocxo Mounting Screws Assembly Replacement Procedure 16. A21 OcxoProcedure 16. A21 Ocxo Ordering Information Direct Mail-Order SystemReplaceable Parts 5-l Replaceable Parts Parts List FormatFirmware-Dependent Part Numbers Direct Phone-Order SystemReference Designations, Abbreviations and Multipliers Reference Designations, Abbreviations, and Multipliers 2 Reference Designations, Abbreviations, and Multipliers 3 Reference Designations, Abbreviations, and Multipliers 4 Manufacturers Code ListQty Front Frame Assembly Front Handle ASS’Y Mount FlangeSLIDE-CHAS 25-IN-LG 21.84-IN-TRVL Interface Assembly Cable Assembly RibbonCable Assembly Probe POWER/LED Controller AssemblyNot Assigned Line Filter Assembly CRT Driver Assembly CRT AssemblyHP-IB Assembly Battery 3.0 V 1.2 A-HR LithiumIf 1 Bottom Cable ASSEMBLY, A7/A8 Drive Power CABLE, RibbonCable Assembly Line Switch Cable ASSEMBLY, SpeakerCable ASSEMBLY, Coax 6, 0 Span Video Cable ASSEMBLY, A10 Rythm DriveCable ASSEMBLY, Coax 97, LO Sweep Cable ASSEMBLY, CoaxCable ASSEMBLY, SEMI-RIGID, RF Input Cable ASSEMBLY, SEMI-RIGID, 1ST LOCable ASSEMBLY, SEMI-RIGID, 1ST Mixer Cable ASSEMBLY, Coax 89, CAL OUTParts Identification, Assembly Mounting Parts List, Cover Assembly SPACER, CRT TUBE, CRT Parts List, Main ChassisParts List, RF Section Parts List, Front Frame Probe Power Jack00000 Keycap Line SCREW-MACHINE Assembly M3 X 0.5 12MM-LGRubber Keypad Includes Keycaps LED-LAMP LUM-INT=560UCD IF=SOMA-MAXLine Filter Module Parts List, Rear Frame5062-7755 3 1 Battery Holder Includes Wires Monofluoride\ \ ‘v’ FI c P3$CES ‘\‘\ Major Assembly and Cable Locations Major Assembly and Cable LocationsA21OCXO FL3 not Assigned FL4Cables Hinged Assemblies 1W2 W52 I T E Bottom View Al5 Unfolded Major Assembly and Cable Locations WI8 Aiai Al6 Fast ADC Option Major Assembly and Cable Locations \\\ Rear View Major Assembly and Cable Locations 6-l Assembly Level Text Block DiagramsGeneral Troubleshooting 7-l Pad Assembly Test PointsGeneral Troubleshooting Ribbon Cables@AMPLIFIER Ribbon Cable Connections 1 General Troubleshooting Ribbon Cable Connections 2 General Troubleshooting Service Cal Data Softkey Menus PKEq Service Cal Data MenuTroubleshooting to a Functional Section CRT Location of Assembly Troubleshooting TextSloda RythmLoading the software TAM Test and Adjustment ModuleHP-IB addresses Data files and system mass storage filesExecuting a test TAM Requirements Erroneous Results Test ConnectorsRevision Connectors Inconsistent ResultsADC/lnterface Check Automatic Fault IsolationDisplay/Power Supply Controller CheckManual Probe Troubleshooting LO Control CheckRF Low Band Check Calibration Oscillator Troubleshooting Mode RF Path Fault IsolationViewing Multiple Messages Error MessagesError Message Elimination System Analyzer Programming Errors 100 toSystem ADC Errors 200 toYTO Loop Errors 300 to Roller PLL Errors 302 toLO and RF Hardware/Firmware Failures 300 to General Troubleshooting General Troubleshooting YTO Loop Errors 317 to Roller Oscillator Errors 321 to OFF Unlk Freq ACC YTO Loop ErrorFractional N PLL MHz Reference LoopYTO Leveling Loop Sampling OscillatorSpan Accuracy Calibration Errors 356 to YTO Loop Settling Errors 351 toAutomatic if Errors 400 to RBW RBW 3K LIN Ampl LOG Ampl General Troubleshooting 7-3General Troubleshooting Ampl 1M General Troubleshooting General Troubleshooting 300 MHz System Errors 600 to Digital and Checksum Errors 700 toEerom Checksum Errors 700 to ROM U306 ROM U307 ROM U308 ROM U309 ROM U310 ROM U311 Program ROM Checksum Errors 705 toMicroprocessor Error 7 Battery ProblemModel Number Error RAM Check Errors 711 toSystem Errors 750 to Fast ADC ErrorOption Module Errors 800 to TG Unlvl User-Generated Errors 900 toFunctional Sections General Troubleshooting Block Diagram DescriptionA7 Sloda RF SectionA10 YIG-Tuned Filter/Mixer Al3 Second ConverterSecond if Amplifier part of A15 Flatness Compensation Amplifiers part of AM Third Converter part of A15YTO PLL A7, All, part of A14, part of A15 Synthesizer SectionSweeping the First LO Reference PLL part of A15Offset Lock Loop part of A15 Phase Lock Loops Fractional N PLL part of A14If Section A4 Log Amplifier/Cal Oscillator AssemblyA5 if Assembly ADC/lnterface SectionLog Expand/Video Functions Controller Section TriggeringFirmware Al7 CRT Display Driver Display/Power Supply SectionA6 Power Supply Display ASMPage Page Page Page ADC/lnterface Section ADC/lnterface SectionW2 Control Cable Connections GND RF Gain LO3 ERR LVFC-ENABLE FC ERR YTO ERR ADC/lntetface SectionGND Scan Ramp Video Trigger DAC2 A3 Test Connectors Troubleshooting Using the TAMADC ASM ADC MUX Automatic Fault Isolation ReferencesTAM Tests versus A3 Test Connectors Keyboard/RPG Problems Keyboard InterfaceKeyboard Matrix RPG Interface Free RUN Video Line External Triggering or Video Gating ProblemsCounter Frequencies Trigger MUX Truth Table10 ADC/lnterface Section Level Yiiqx5q12 ADC/lntertace Section Preselector Peaking Control Real Time DACADC/lntefface Section Flatness Control RF Gain DACs14 ADC/lnterface Section A3 Assembly Video CircuitsLog Offset/Log Expand 16 ADC/lnterface Section Video MUXVideo Filter Video Filter Buffer Amplifier Latch Outputs18 ADC/lnterface Section Positive/Negative Peak Detectors Select Desectdr POS Peak modePeak Detector Reset HMUX-SELO/l versus Detector Mode20 ADC/lnterface Section ADC MUX Rosenfell Detector22 ADC/lnterface Section Logic Levels at A3U108Track and Hold Variable Gain Amplifier VGAA3 Assembly ADC Circuits ADC Control Signals24 ADC/lnterface Section ADC Start/Stop Control 26 ADC/lnterface Section ADC ASMRamp Counter A3 Assembly Control Circuits Analog Bus Drivers28 ADC/lnterface Section Analog Bus Timing 30 ADC/lnterface Section Interface Strobe Select10. Demultiple er A3U410 Truth Table 1. Demultiple er A3U500 Truth TableVideo Input Scaling Amplifiers and Limiter Al6 Assembly Fast ADC Circuits Option32 ADC/lnterface Section Bit Flash ADCNEG Peak/Pit DetectionByte Static RAM POS34 ADC/lntertace Section Al6 Assembly Fast ADC Control Circuits OptionCPU Interface and Control Registers 13. Control Word at Primary Address U3 and U4Lloadaddr Vtrig POLLsample LadcenReference Clock 38 ADC/lnterface SectionHswp Trigger Clock and Sample Rate GeneratorBit 32 K Circular Address Counter Bit Post-Trigger CounterVideo Trigger Comparator Page QEL--QWa5-w---w If -l If SectionIf Section A4 LOG AMP/CAL OSC Troubleshooting A5 with the TAM Troubleshooting the Log Amplifier with the TAMTAM Tests versus Test Connectors Ifdac FdacCal fist Troubleshooting Nude Troubleshooting the Cal Oscillator with the TAM Sweep Width Settings Automatic if AdjustmentParameters Adjusted Requirements Performance Test Failures If Gain Uncertainty Performance lestScale Fidelity Performance lest Log Amplifier P/O A4 Assembly Resolution Bandwidths Performance TestsLog Amplifier If Gain Application Guidelines ATTEN=lO dB Linear AmplifiersVideo Off set Video Output Frequency Counter Prescaler/ConditionerAM/FM Demodulator MHz if Filters KHz if FiltersMHz Vcxo KHz and 10.7 MHz if FiltersInput Switch LO SwitchSynchronous Detector Log Off set/Gain Compensation A5 if Assembly KHz If SignatureIf Adjust Signature If Section Detailed if Adjust Signature LOG Ofysets 510 CjBm,-‘-ifTiN= dB 0 dBm II ill M P L E IIilI Common if Signature ProblemsL3klB 11. Region B Amplitude Variation 500 MHz Resolution Bandwidth ProblemsKHz and 10 kHz Resolution Bandwidth Problems KHz Resolution Bandwidth ProblemsStep Gains 15. Faulty Crystal SymmetryCal Oscillator P/O A4 Assembly Inadequate CAL OSC Amptd Range Cal Oscillator Unlock at Beginning of if AdjustHz to 3 kHz Resolution Bandwidth Out of Specification 16. Output Waveform, 10 kHz Resolution Bandwidth If Section 17. Output Waveform, 3 kHz Resolution Bandwidth 19. Output Waveform, 300 Hz Resolution Bandwidth Low-Pass Filter Sweep GeneratorAM/FM Demodulation, Audio Amplifier, and Speaker If Section Page Page Page Controller -l Controller Section2 Controller Section MSl, MS3 through MS6, MS8Controller Section A2 Test ConnectorsDisplay Problems Digital Signature Analysis DSALine Generators Line Generator Output Waveforms BlankingBlanking Waveforms 6 Controller Section Expanded Blanking Waveforms Display Jumbled or Trace Off ScreenIO-8 Controller Section Switch Driver Waveform LcharDistorted X/Y Line Generator Waveforms Intensity Bad Characters or GraticuleLo-10 Controller Section Delta X Waveform Long Lines Dimmer Than Short LinesLo-12 Controller Section Analog Zero-Span Problems Non-OptionController Section lo Frequency-Count Marker ProblemsFrequency Counter Gate TimesLo-14 Controller Section Controller Section lo-15 State- and Trace-Storage ProblemsLo-16 Controller Section Keyboard ProblemsPage Synthesizer l-1 Synthesizer SectionSynthesizer Section A21 OcxoTAM Connector Pin Locations L. Measured Signal Line Location Al4 and Al5 Test Connectors4 Synthesizer Section Synthesizer l-5 YTF 6 Synthesizer SectionDAC MS7 FAVMS8 MS2 MS5 MS6 MS7 OFLAGC MS1 MS2 MS3 MS4 MS6 MS8 MS5,MS7,MS8YTO PLL Troubleshooting Test SetupConfirming a Faulty Synthesizer Section 8 Synthesizer SectionSynthesizer l-9 Center Frequency Tuning ValuesCheck A3 ADC MUX Function Block steps Check A14J301 10 MHz reference input stepsCheck First LO steps Check Al4 frequency control assembly stepsSynthesizer -l YTO Loop Test Setup Check Al5 RF assembly steps12 Synthesizer Section 4. Sampler and Sampling Oscillator Test SetupSynthesizer General PLL TroubleshootingPLL Locked at Wrong Frequency Sampling Oscillator Test FrequenciesPLL Locked at Wrong Frequency Synthesizer Section REF- \ YSynthesizer l-15 Unlocked PLLCheck 100 MHz VCXO, tripler, and doubler steps TroubleshootingUnlocked Reference PLL OperationCheck phase/frequency detector steps Check 10 MHz reference to phase/frequency detector stepsCheck the 100 MHz lock loop integrator steps Check level at amplifier input steps Third LO Driver Amplifier20 Synthesizer Section Unlocked Offset Lock Loop Sampling OscillatorCheck loop references steps 1 Check levels into mixer stepsSampling Oscillator PLL Divide Numbers Check path to phase/frequency detector steps Unlocked YTO PLL 7. Amplifier Polarities 7. Troubleshooting an Unlocked YTO PLL Synthesizer l-25 Troubleshooting an Unlocked YTO PLL26 Synthesizer Section Check First LO pretune frequency and amplitude stepsCheck FM loop sense steps Check the fractional N oscillator stepsCheck sampler drive output of A7 Sloda steps Check sampler if stepsSynthesizer Section Main Coil Coarse and Fine DACs Voltages Voltages in FM Coil and Main Loop DriversCheck main coil coarse and fine DACs steps Check main coil tune DAC steps30 Synthesizer Section Confirming an Unlocked Condition Unlocked Fractional N PLLFractional N PLL 10. Postscaler Divide Numbers32 Synthesizer Section 1 1. Unlocked Fractional N Troubleshooting Areas VcoVCO 0AT VOLTAGE-CONTROLLED Oscillator Synthesizer l-35 12. Divider and Integrator Troubleshooting14. Harmonic Mixing Number versus Center Frequency Frequency Span Accuracy Problems13. Sweep Signal Destination versus Span Determining the First LO SpanSynthesizer l-37 Confirming Span Problems38 Synthesizer Section YTO Main Coil Span Problems LO Spans 20 MHzYTO FM Coil Span Problems LO Spans 2.01 MHz to 20 MHz 15. Settings of Sweep SwitchesSynthesizer l-39 Fractional N Span Problems LO Spans 52 MHz40 Synthesizer Section First LO Span Problems All SpansCheck span attenuator steps Check current source steps16. Settings for Switches and Comparators First LO Span Problems Multiband SweepsHP 6562E Sweep and Scan Ramps Synthesizer Section Phase Noise Problems Phase Noise in Locked versus Unlocked SpansReference versus Reference PLL Phase Noise Fractional N PLL Phase Noise Fractional N versus Offset PLL or YTO PLL Phase NoiseSampler and Sampler if Sweep Generator Circuit Set a microwave source to the following settings10. Simplified Synthesizer Section JP/O a l Al5 RF 50 Synthesizer Section A21 OcxoPage Page RF Section RF SectionAl4 and Al5 Test Connectors RF Section Automatic Fault Isolation References PIN Low Band ProblemsLow and High Band Problems High Band ProblemsA7 LO Distribution Amplifier ‘0 0 0 0 0 0A8 Low Band Mixer A9 Input Attenuator Low RF Section Al4 Frequency Control Assembly Loda DriveRF -l A7 First LO Distribution Amplifier Drive Control Latch for Band-Switch DriverYTF Driver Circuit HP 8582E Rear-Panel LO SWP Output FE RUIPbbzl Offset Sweep + Tune Multiplier ValuesAl5 RF Assembly Confirming a Faulty Third ConverterConfirming Third Converter Output Third Converter Control Latches Flatness Compensation ControlSIG ID Oscillator Option Q604 on MHz ReferenceMHz Reference at A15J302 RF Section MHz TTL Reference at U304 Pin RF Section RF Section Mnemonic Table Page Isplay/Power Supply Section @I w3 Wl Power-Cable Connections GNDPWR UP Pms Pins 41’ +28 Al7 Test Connector TAM Tests versus Test Connectors Blank Display Using the TAMBlank Display Probe Power Socket Blanking SignalDisplay Distortion Focus Problems Intensity Problems Display/Power Supply -l A6 Power Supply Assembly Troubleshooting Dead Power SupplyCheck the Supply Voltages Buck Regulator Kick-start/BiasSupply Restarting Every 1.5 Seconds Kick Start Line Fuse BlowingLow Voltage Supplies Buck Regulator Control LoopHigh Voltage Supplies CRT Supply Dropping Out DC-DC Converter Control Buck Regulator ControlPower Up Page Page Component-Level Information Packets A-l Component-Level Information PacketsComponent-Level Information Packets Table A-l. HP 8562 Spectrum Analyzer Documented AssembliesComponent-Level Information Packets A-3 Table A-l. HP 8582 Spectrum Analyzer Documented AssembliesPage Index-l OcxoAFI Index-2Fadc Index-3Index-4 Loda Index-5Index-6 Index-7 Index-6