Agilent Technologies 5071A manual A9 Diagnostic Tree A/M Subsection 5.0 A9 Mon Signal Test

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Assembly-Level Service

Service

A9 Diagnostic Tree (A/M Subsection 4)

3.4.5.0A9 Mon Signal Test

Any TCO Option: This procedure is deleted.

3.4.6.0A9 J4 80-MHz Signal Test

Any TCO Option: This procedure is deleted.

Any TCO Option: The following procedure is added:

4.4.4.1 A9-to-Chassis TCO Option signal Interconnect Test

If one or more of the four rear-panel telecommunications outputs are absent or operating out of specification, use the following procedure to isolate the fault.

1Remove instrument power.

2Carefully remove the five (or six for a differential framed output) telecomm signal SMB cable connectors (Note their locations first.) from J6, J7, J8, (J9 - used only for options 104, 105, 220, 221, and 222), J10, and J11 on A9.

3Verify continuity and rule out short-to-ground for all five cables and their corresponding rear-panel input and outputs.

4Reconnect the verified cables and connectors.

QUESTION: Are any of the five SMB-to-BNC cable assemblies open or shorted?

If Yes: Replace the cable assembly as required and retest.

If No: Reapply instrument power, retest A9 TCO input/outputs, and replace A9 if any TCO signal output fault persists.

2-9

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Contents 7HOHFRPPXQLFDWLRQV2SWLRQV Page Telecommunications Options Supplemental Manual Before Cleaning Manual Updating Changes 05071-90042, December Contents Service Available Accessories and Options Supplemental CharacteristicsContents Instrument Identification How to Use This ManualHow to Order Manuals Instruments Covered by This manualManual Organization Operating and Programming Introduction 5071A Major FeaturesIntroducing the 5071A Operating The 5071AGetting Started Connectors5071A at a Glance Rear-Panel Connections5071A Rear Panel Connections Fuse Starting The 5071A Powering Down the 5071APerforming Basic Tasks Synchronizing to an External 1 PPS ReferenceUsing the 5071A Disabling the Internal -Standby BatteryMonitoring Status Rear-Panel Output Connectors Front-Panel Indicators and MessagesCase of Difficulty Restarting the 5071A5071A Command Summary 5071A Command ReferencesScpi Subsystem Commands Scpi CommandsSpecifications Power Requirements InstallationOperating the 5071A From External Dc Power Preparation for UseReplacing the External Dc Input Power Fuse Internal Standby Battery MaintenanceLong-Term Storage Preparing the RP 5071-A For External-Dc OperationAssembly-Level Service Rear-Panel Output Signal Checks Performance Tests5071A Operational Verification Service Assembly Identification and LocationOption Top-Level Diagnostic Tree Organization Top-Level Diagnostic Tree Diagnostic SectionFirst Power On Warm-up and Fatal Error Diagnostic Tree Advisory Messages Subsection Power-Supply Diagnostic Tree4.0.0 Ext. Dc Input Fuse Fault Ac-Line Fuse Fault Isolation r/o LF1/T1No Operation From Internal Standby Battery Internal-Battery Charger TestA8 Diagnostic Tree A/M Subsection 3 1 PPS Outputs Test Assembly/Module Diagnostic Trees Diagnostic Section4 A8 Front/Rear-Panel Sync Input Test 5 A8-to-Chassis Interconnect TestA9 Diagnostic Tree A/M Subsection 5.0 A9 Mon Signal Test 6.0 A9 J4 80-MHz Signal Test4.1 A9-to-Chassis TCO Option signal Interconnect Test Introduction Theory of OperationSimplified Functional Description A1 Motherboard Circuit DescriptionPower Supply Block Functional Block DescriptionsInput/Output Block Instrument Control Block Operating Firmware Warning ModeReference Oscillator/RF-Chain Block Interconnections Power Supply Block A1 Motherboard Circuit Description Overvoltage Protection CircuitExternal Dc Input Circuit A1 Power Supply/Distribution Schematic Diagram A11 Power Steering Logic AssemblyInput Chassis Ground 48V Subpanel AssemblyA1 Power-Supply Block Diagram B1 Internal-Standby BatteryExchange Assemblies Replaceable PartsReplaceable Parts Backdating Backdating Specifications Internal Standby Battery Nominal Values Supplemental CharacteristicsTime Standard EnvironmentalAccessories Furnished Dc input connector WeightOptions Available Accessories and OptionsService and Support From front matter Declaration of Conformity Page Page Manual Part Number