Contents-14 | Agilent Technologies 856290216 instruction

A-l. HP 85623 Interconnect Block Diagram

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Agilent Technologies 856290216 service manual Contents-14

Contents

About this Manual HP Part No -90218 Supersedes Fia HewlettPage Warranty CertificationRegulatory Information Assistance Safety Notes Prevent electrical shock, do not remove covers General Safety Considerations How 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-15 PLL Serial Numbers and Repair Information Serial Number Label ExampleGeneral Information l-1 Table l- 1. Instrument Variations Instrument VariationsGeneral Information A21 Ocxo General Information l-3 HP 85629B Test and Adjustment Module Service Kit Table l-2. Service Kit ContentsElectrostatic Discharge General Information l-5 Reducing Potential for ESD Damage Static-Safe Accessories Returning Instruments for ServiceService Tag Static-Safe Accessories Other Packaging 9211-6969 Outer Carton 9220-5073 Pads 9220-5072 Top Tray General Information l-9 Recommended Test Equipment Instrument Sources Table l-4. Recommended Test Equipment General Information l-l Recommended Test Equipment Instrument Critical Specifications Recommended Use Instrument Accessories PAV PAM Sales and Service Offices US Field Operations Hewlett-Packard Sales and Service Offices Introduction Adjustment Procedures Which Adjustments Should Be Performed? Safety ConsiderationsAdjustable and Factory-Selected Components Test Equipment Adjustment Tools Instrument Service Position8710-0033 A5 if Related Adjustments A10 Rythm Adjustable Components FM Span HV ADJSmpl Match VCO Range Factory Selected Components Adjustment Indicator Using the TAM YTO TAM Adjustments Required Test Equipment for TAM Adjustment Procedures 2-l Front End Cal adjustment Assembly Adjusted High Voltage Power Supply AdjustmentHigh Voltage Power Supply Adjustment Related Performance Test Equipment Procedure Display Adjustment Display Adjustment Preliminary Adjustments Cutoff AdjustmentDeflection Adjustments CRT Adjust Pattern Adjustment Procedures Intensity Adjustments A2 Display Adjustment Locations Fast Zero Span Adjustments Press SAVEI, Save State ,and State If Bandpass Adjustment If Bandpass Adjustment TAM Connector Pin Locations LC Bandpass Adjustments Factory-Selected LC Filter Capacitors Xtal Bandpass Adjustments Xtal Factory-Selected Capacitor Selection Factory-Selected Xtal Filter CapacitorsA5T200 Xtal CTR A5T202 Xtal CTR If Bandpass Adjustment 10. Capacitor Part Numbers Related Performance Tests If Amplitude Adjustments If Amplitude Adjustment Locations If Amplitude Adjustments A5 Reference Attenuator Adjustment A5 Adjustment Verification DC Log Adjustment Setup Adjustment Procedures DC Log Amplifier Adjustments DC Log Amplifier Adjustments A4 Limiter Phase Adjustment Log Amplifier Adjustments A4 Linear Fidelity Adjustment Press -,a, if AlI on OFF OFF, AD3 Curr if State A4 LOG Fidelity Adjustment 11. Sampler Adjustment Setup Sampling Oscillator Adjustment Sampling Oscillator Adjustment Sampler Match AdjustmentSampling Oscillator Adjustment Sampling Oscillator Adjustment 1. Sampling Adjustments YTO Adjustment YTO Adjustment 07SAVE Save STATE, State RECALL, Recall STATE, State YTO Main Coil Adjustments 14. YTO Adjustment Locations YTO FM Coil Adjustments 15. First LO Distribution Amplifier Adjustment Setup LO Distribution Amplifier Adjustment 18. TAM Connector Pin Locations LO Distribution Amplifier Adjustment DAC 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 Adjustment MHz Reference Adjustment-OCXO Non-Option 19 MHz Reference Adjustment Setup and Adjustment Location MHz Reference Adjustment-OCXO Non-Option OFF MHz Reference Adjustment-TCXO Option MHz Reference Adjustment-TCXO Option Procedure Demodulator Adjustment Demodulator Adjustment SPAN, Zero Span 22. Demodulator Adjustment Locations Adjustment Procedures 23. External Mixer Bias Adjustment Setup External Mixer Bias Adjustment Non-Option External Mixer Amplitude Adjustment Non-Option External Mixer Amplitude Adjustment Non-Option Supplied with HP 8481D EXT MXR REF CAL 25. Rythm Adjustment Setup YIG-Tuned Filter/Mixer Rythm Adjustment YIG-Tuned Filter/Mixer Rythm Adjustment Save Presel PK MHz PLL Adjustment MHz PLL Adjustment 27 MHz PLL Adjustment Location MHz PLL Adjustment MHz Reference Adjustment Frequency Response Adjustment Software 3-l Frequency Response Adjustment Software Getting Started Frequency Response Adjustment SoftwareSpectrum Analyzers Controller Computer Warmup Time Test Equipment Warmup Spectrum Analyzer WarmupRequired Test Equipment Summary Adjustment Setups Computer Controller SetupEquipment Connections HP-IB Cables Using Frequency Response Adjustment Software Loading the ProgramProgram Operation Conditions Menu Power SensorsTest Record Header Information System Mass Storage File Location Storing and Loading the Conditions File Setting HP-IB Addresses Exiting Frequency Response Adjustment Getting to the Adjust MenuVerifying the HP-IB Querying the Spectrum Analyzer Serial Number Sensor Utilities Menu Adding a Power Sensor Data File Adjust Menu Calibrate Power Sensor Single TestList Equipment List Files Frequency Response Adjustment Menu Softkeys Single 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 Messages File filename not found Power meter reads value dBmInsufficient equip. to do test test number test name No HP-IB address listed for DUT Error Messages Beginning with Numeric Characters Error Messages Beginning with Variables Assembly Replacement Assembly Replacement Access to Internal Assemblies Required Tools Cable Color Code Removal/Replacement Procedure I. Spectrum Analyzer Cover Procedure 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 Replacement A9, A18, and Line-Switch Assembly Mounting Screws Front frame Mounting Screws Installing the CRT and front frame Assemblies Replacement Placing the CRT into the Front Frame Assembly Replacement 4-l Procedure 2. Al Front Frame/Al8 CRT Procedure 3. AlAl Keyboard/Front Panel Keys Procedure 3. Al Al Keyboard/Front Panel Keys Procedure 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 Assemblies 10. HP-IB and AlAl Wl Cable Placement Assembly Replacement Procedure 6. A6 Power Supply Assembly Procedure 6. A6 Power Supply Assembly Replacement 1. A6 Power Supply Connections Assembly Replacement 12. Power Supply Cover Assembly Replacement Procedure 7. A6Al High Voltage Assembly Procedure 7. A6Al High Voltage Assembly 13. 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 Assemblies A7 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 Rythm All YTO All YTO Al3 Second Converter Procedure 9. Al4 and A15 Assemblies Procedure 9. Al4 and Al5 Assemblies Procedure 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 Driver 21. Al6 Cable Routing Assembly Replacement Procedure 10. Al6 Fast ADC and Al7 CRT Driver Procedure 11. Bl Fan Procedure 12. ET1 Battery Procedure 12. BTI Battery Procedure 13. Rear Frame/Rear Dress Panel 22. Main Deck Screws Procedure 13. Rear Frame/Rear Dress Panel W24, coax 5 W23, coax 23. A6 Power Supply Cover Assembly Replacement Personnel and damage to the instrument Procedure 14. W3 Line Switch Cable 24. W3 Dress and Connection to A6 Power Supply Procedure 14. W3 Line Switch Cable Screw Quantity Standoff 26. W3 Cable Connector Replacement Using Contact Removal Tool, HP part number Replacement without Contact Removal Tool 27. Side Frame Mounting Screws Procedure 15. Eerom A2U500 Procedure 15. Eerom A2U500 28. A21 Ocxo Mounting Screws Assembly Replacement Procedure 16. A21 Ocxo Procedure 16. A21 Ocxo Ordering Information Direct Mail-Order SystemReplaceable Parts 5-l Firmware-Dependent Part Numbers Parts List FormatDirect Phone-Order System Replaceable Parts Reference Designations, Abbreviations and Multipliers Reference Designations, Abbreviations, and Multipliers 2 Reference Designations, Abbreviations, and Multipliers 3 Reference Designations, Abbreviations, and Multipliers 4 Manufacturers Code List Qty Front Frame Assembly Front Handle ASS’Y Mount FlangeSLIDE-CHAS 25-IN-LG 21.84-IN-TRVL Cable Assembly Probe POWER/LED Cable Assembly RibbonController Assembly Interface Assembly HP-IB Assembly CRT Driver Assembly CRT AssemblyBattery 3.0 V 1.2 A-HR Lithium Not Assigned Line Filter Assembly If 1 Bottom Cable Assembly Line Switch Power CABLE, RibbonCable ASSEMBLY, Speaker Cable ASSEMBLY, A7/A8 Drive Cable ASSEMBLY, Coax 97, LO Sweep Cable ASSEMBLY, A10 Rythm DriveCable ASSEMBLY, Coax Cable ASSEMBLY, Coax 6, 0 Span Video Cable ASSEMBLY, SEMI-RIGID, 1ST Mixer Cable ASSEMBLY, SEMI-RIGID, 1ST LOCable ASSEMBLY, Coax 89, CAL OUT Cable ASSEMBLY, SEMI-RIGID, RF Input Parts Identification, Assembly Mounting Parts List, Cover Assembly SPACER, CRT TUBE, CRT Parts List, Main Chassis Parts List, RF Section Parts List, Front Frame Probe Power Jack00000 Rubber Keypad Includes Keycaps SCREW-MACHINE Assembly M3 X 0.5 12MM-LGLED-LAMP LUM-INT=560UCD IF=SOMA-MAX Keycap Line 5062-7755 3 1 Battery Holder Includes Wires Parts List, Rear FrameMonofluoride Line Filter Module \ \ ‘v’ FI c P3$CES ‘\‘\ Major Assembly and Cable Locations Major Assembly and Cable Locations A21OCXO FL3 not Assigned FL4 Cables 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 General Troubleshooting Assembly Test PointsRibbon Cables Pad @AMPLIFIER Ribbon Cable Connections 1 General Troubleshooting Ribbon Cable Connections 2 General Troubleshooting Service Cal Data Softkey Menus PKEq Service Cal Data Menu Troubleshooting to a Functional Section Sloda Location of Assembly Troubleshooting TextRythm CRT Loading the software TAM Test and Adjustment Module HP-IB addresses Data files and system mass storage filesExecuting a test TAM Requirements Revision Connectors Test ConnectorsInconsistent Results Erroneous Results Display/Power Supply Automatic Fault IsolationController Check ADC/lnterface Check Manual Probe Troubleshooting LO Control CheckRF Low Band Check Calibration Oscillator Troubleshooting Mode RF Path Fault Isolation Viewing Multiple Messages Error Messages Error Message Elimination System Analyzer Programming Errors 100 to System ADC Errors 200 to YTO 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 Error YTO Leveling Loop MHz Reference LoopSampling Oscillator Fractional N PLL Span Accuracy Calibration Errors 356 to YTO Loop Settling Errors 351 to Automatic if Errors 400 to RBW RBW 3K LIN Ampl LOG Ampl General Troubleshooting 7-3 General 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 to Model Number Error Battery ProblemRAM Check Errors 711 to Microprocessor Error 7 System Errors 750 to Fast ADC ErrorOption Module Errors 800 to TG Unlvl User-Generated Errors 900 to Functional Sections General Troubleshooting Block Diagram Description A7 Sloda RF Section A10 YIG-Tuned Filter/Mixer Al3 Second ConverterSecond if Amplifier part of A15 Flatness Compensation Amplifiers part of AM Third Converter part of A15 Sweeping the First LO Synthesizer SectionReference PLL part of A15 YTO PLL A7, All, part of A14, part of A15 Offset Lock Loop part of A15 Phase Lock Loops Fractional N PLL part of A14 If Section A4 Log Amplifier/Cal Oscillator Assembly A5 if Assembly ADC/lnterface SectionLog Expand/Video Functions Controller Section TriggeringFirmware A6 Power Supply Display/Power Supply SectionDisplay ASM Al7 CRT Display DriverPage Page Page Page ADC/lnterface Section ADC/lnterface Section W2 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 TAM ADC ASM ADC MUX Automatic Fault Isolation References TAM Tests versus A3 Test Connectors Keyboard/RPG Problems Keyboard InterfaceKeyboard Matrix RPG Interface Counter Frequencies Triggering or Video Gating ProblemsTrigger MUX Truth Table Free RUN Video Line External 10 ADC/lnterface Section Level Yiiqx5q 12 ADC/lntertace Section Preselector Peaking Control Real Time DAC ADC/lntefface Section Flatness Control RF Gain DACs 14 ADC/lnterface Section A3 Assembly Video Circuits Log Offset/Log Expand 16 ADC/lnterface Section Video MUX Video Filter Video Filter Buffer Amplifier Latch Outputs18 ADC/lnterface Section Positive/Negative Peak Detectors Select Desectdr POS Peak mode Peak Detector Reset HMUX-SELO/l versus Detector Mode20 ADC/lnterface Section ADC MUX Rosenfell Detector 22 ADC/lnterface Section Logic Levels at A3U108 Track and Hold Variable Gain Amplifier VGA A3 Assembly ADC Circuits ADC Control Signals24 ADC/lnterface Section ADC Start/Stop Control 26 ADC/lnterface Section ADC ASM Ramp Counter A3 Assembly Control Circuits Analog Bus Drivers28 ADC/lnterface Section Analog Bus Timing 10. Demultiple er A3U410 Truth Table Interface Strobe Select1. Demultiple er A3U500 Truth Table 30 ADC/lnterface Section Video Input Scaling Amplifiers and Limiter Al6 Assembly Fast ADC Circuits Option 32 ADC/lnterface Section Bit Flash ADC Byte Static RAM Peak/Pit DetectionPOS NEG CPU Interface and Control Registers Al6 Assembly Fast ADC Control Circuits Option13. Control Word at Primary Address U3 and U4 34 ADC/lntertace Section Lsample Vtrig POLLadcen Lloadaddr Reference Clock 38 ADC/lnterface SectionHswp Trigger Clock and Sample Rate Generator Bit 32 K Circular Address Counter Bit Post-Trigger Counter Video Trigger Comparator Page QEL--QWa5-w---w If -l If Section If Section A4 LOG AMP/CAL OSC Troubleshooting A5 with the TAM Troubleshooting the Log Amplifier with the TAM TAM Tests versus Test Connectors Ifdac Fdac Cal fist Troubleshooting Nude Troubleshooting the Cal Oscillator with the TAM Sweep Width Settings Automatic if Adjustment Parameters 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 Amplifiers Video Off set Video Output Frequency Counter Prescaler/ConditionerAM/FM Demodulator MHz if Filters KHz if Filters MHz Vcxo KHz and 10.7 MHz if Filters Input Switch LO SwitchSynchronous Detector Log Off set/Gain Compensation A5 if Assembly KHz If Signature If 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 Problems L3klB 11. Region B Amplitude Variation 500 MHz Resolution Bandwidth Problems KHz and 10 kHz Resolution Bandwidth Problems KHz Resolution Bandwidth Problems Step Gains 15. Faulty Crystal Symmetry Cal Oscillator P/O A4 Assembly Inadequate CAL OSC Amptd Range Cal Oscillator Unlock at Beginning of if Adjust Hz 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 Section 2 Controller Section MSl, MS3 through MS6, MS8 Controller Section A2 Test Connectors Display Problems Digital Signature Analysis DSALine Generators Line Generator Output Waveforms Blanking Blanking Waveforms 6 Controller Section Expanded Blanking Waveforms Display Jumbled or Trace Off Screen IO-8 Controller Section Switch Driver Waveform Lchar Distorted X/Y Line Generator Waveforms Intensity Bad Characters or GraticuleLo-10 Controller Section Delta X Waveform Long Lines Dimmer Than Short Lines Lo-12 Controller Section Analog Zero-Span Problems Non-Option Controller Section lo Frequency-Count Marker Problems Frequency Counter Gate TimesLo-14 Controller Section Controller Section lo-15 State- and Trace-Storage Problems Lo-16 Controller Section Keyboard ProblemsPage Synthesizer l-1 Synthesizer Section Synthesizer Section A21 Ocxo TAM Connector Pin Locations L. Measured Signal Line Location Al4 and Al5 Test Connectors 4 Synthesizer Section Synthesizer l-5 DAC MS7 6 Synthesizer SectionFAV YTF AGC OFLMS1 MS2 MS3 MS4 MS6 MS8 MS5,MS7,MS8 MS8 MS2 MS5 MS6 MS7 Confirming a Faulty Synthesizer Section Troubleshooting Test Setup8 Synthesizer Section YTO PLL Check A3 ADC MUX Function Block steps Center Frequency Tuning ValuesCheck A14J301 10 MHz reference input steps Synthesizer l-9 Check First LO steps Check Al4 frequency control assembly steps Synthesizer -l YTO Loop Test Setup Check Al5 RF assembly steps 12 Synthesizer Section 4. Sampler and Sampling Oscillator Test Setup PLL Locked at Wrong Frequency General PLL TroubleshootingSampling Oscillator Test Frequencies Synthesizer PLL Locked at Wrong Frequency Synthesizer Section REF- \ Y Synthesizer l-15 Unlocked PLL Unlocked Reference PLL TroubleshootingOperation Check 100 MHz VCXO, tripler, and doubler steps Check phase/frequency detector steps Check 10 MHz reference to phase/frequency detector steps Check the 100 MHz lock loop integrator steps Check level at amplifier input steps Third LO Driver Amplifier Check loop references steps 1 Unlocked Offset Lock Loop Sampling OscillatorCheck levels into mixer steps 20 Synthesizer Section Sampling 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 PLL 26 Synthesizer Section Check First LO pretune frequency and amplitude steps Check sampler drive output of A7 Sloda steps Check the fractional N oscillator stepsCheck sampler if steps Check FM loop sense steps Synthesizer Section Check main coil coarse and fine DACs steps Voltages in FM Coil and Main Loop DriversCheck main coil tune DAC steps Main Coil Coarse and Fine DACs Voltages 30 Synthesizer Section Confirming an Unlocked Condition Unlocked Fractional N PLL Fractional 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 Troubleshooting 13. Sweep Signal Destination versus Span Frequency Span Accuracy ProblemsDetermining the First LO Span 14. Harmonic Mixing Number versus Center Frequency Synthesizer l-37 Confirming Span Problems YTO FM Coil Span Problems LO Spans 2.01 MHz to 20 MHz YTO Main Coil Span Problems LO Spans 20 MHz15. Settings of Sweep Switches 38 Synthesizer Section Synthesizer l-39 Fractional N Span Problems LO Spans 52 MHz Check span attenuator steps First LO Span Problems All SpansCheck current source steps 40 Synthesizer Section 16. Settings for Switches and Comparators First LO Span Problems Multiband Sweeps HP 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 Noise Sampler and Sampler if Sweep Generator Circuit Set a microwave source to the following settings 10. Simplified Synthesizer Section JP/O a l Al5 RF 50 Synthesizer Section A21 OcxoPage Page RF Section RF Section Al4 and Al5 Test Connectors RF Section Automatic Fault Isolation References PIN Low Band Problems Low and High Band Problems High Band Problems A7 LO Distribution Amplifier ‘0 0 0 0 0 0 A8 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 Driver YTF Driver Circuit HP 8582E Rear-Panel LO SWP Output FE RUI Pbbzl Offset Sweep + Tune Multiplier Values Al5 RF Assembly Confirming a Faulty Third ConverterConfirming Third Converter Output Third Converter Control Latches Flatness Compensation Control SIG ID Oscillator Option Q604 on MHz Reference MHz 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 TAM Blank Display Probe Power Socket Blanking Signal Display Distortion Focus Problems Intensity Problems Display/Power Supply -l A6 Power Supply Assembly Troubleshooting Dead Power SupplyCheck the Supply Voltages Buck Regulator Kick-start/Bias Supply Restarting Every 1.5 Seconds Kick Start Line Fuse Blowing Low Voltage Supplies Buck Regulator Control LoopHigh Voltage Supplies CRT Supply Dropping Out DC-DC Converter Control Buck Regulator Control Power Up Page Page Component-Level Information Packets A-l Component-Level Information Packets Component-Level Information Packets Table A-l. HP 8562 Spectrum Analyzer Documented Assemblies Component-Level Information Packets A-3 Table A-l. HP 8582 Spectrum Analyzer Documented AssembliesPage Index-l Ocxo AFI Index-2 Fadc Index-3 Index-4 Loda Index-5 Index-6 Index-7 Index-6