Agilent Technologies 5071A guide

Assembly-Level Service

Service

Warm-up and Fatal Error Diagnostic Tree

(Diagnostic Subsection 3)

1.3.1.1 Operating Error-Code Interpretation

Any TCO Option: On page 2-28,FIRST WORD message item 16 “SAW Osc unlocked” is changed to:

16. Unused bit, always 0

1.3.2.1Cs Oven Failed: Ion Pump Overcurrent Warm-up Error

Option 048: The If No response to the QUESTION, is changed to:

The problem may have cleared itself, remove instrument power and retest.

1.3.2.2A16/CBT Excess Ion-Pump Current Test Option 048: Step 1 text is changed to:

Remove instrument power and wait at least 60 seconds for the high voltage supplies to bleed down.

Warning Message Diagnostic Tree (Subsection 4)

1.4.4Power Source is Batt

Option 048: This procedure is deleted,

1.4.4.1Ac-Line Operation - Battery Indicator On

Option 048: This procedure is renumbered as 1.4.4.

1.4.4.2Instrument Ac Power Absent

Option 048: Step 1 text is changed to:

Apply ac power.

Step 3 text is changed to:

Verify that the voltage is between 45 and 51 Vdc and record results. The QUESTION: is changed to:

Is the voltage 45 - 51 Vdc?

2-5

Image 29

Agilent Technologies 5071A manual Warm-up and Fatal Error Diagnostic Tree

Contents

7HOHFRPPXQLFDWLRQV2SWLRQV Page Telecommunications Options Supplemental Manual Before Cleaning Manual Updating Changes 05071-90042, December Contents Service Available Accessories and Options Supplemental Characteristics Contents Instrument Identification How to Use This Manual Manual Organization How to Order ManualsInstruments Covered by This manual Operating and Programming Introduction 5071A Major FeaturesIntroducing the 5071A Operating The 5071A Getting Started Connectors5071A at a Glance Rear-Panel Connections 5071A Rear Panel Connections Fuse Starting The 5071A Powering Down the 5071APerforming Basic Tasks Synchronizing to an External 1 PPS Reference Monitoring Status Using the 5071ADisabling the Internal -Standby Battery Rear-Panel Output Connectors Front-Panel Indicators and MessagesCase of Difficulty Restarting the 5071A 5071A Command Summary 5071A Command ReferencesScpi Subsystem Commands Scpi Commands Specifications Power Requirements InstallationOperating the 5071A From External Dc Power Preparation for Use Replacing the External Dc Input Power Fuse Internal Standby Battery MaintenanceLong-Term Storage Preparing the RP 5071-A For External-Dc Operation Assembly-Level Service 5071A Operational Verification Rear-Panel Output Signal ChecksPerformance Tests Option ServiceAssembly Identification and Location First Power On Top-Level Diagnostic Tree OrganizationTop-Level Diagnostic Tree Diagnostic Section Warm-up and Fatal Error Diagnostic Tree Advisory Messages Subsection Power-Supply Diagnostic Tree 4.0.0 Ext. Dc Input Fuse Fault Ac-Line Fuse Fault Isolation r/o LF1/T1No Operation From Internal Standby Battery Internal-Battery Charger Test A8 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 Test 4.1 A9-to-Chassis TCO Option signal Interconnect Test A9 Diagnostic Tree A/M Subsection 5.0 A9 Mon Signal Test6.0 A9 J4 80-MHz Signal Test Introduction Theory of OperationSimplified Functional Description A1 Motherboard Circuit Description Input/Output Block Power Supply BlockFunctional Block Descriptions Instrument Control Block Operating Firmware Warning Mode Reference Oscillator/RF-Chain Block Interconnections Power Supply Block External Dc Input Circuit A1 Motherboard Circuit DescriptionOvervoltage Protection Circuit A1 Power Supply/Distribution Schematic Diagram A11 Power Steering Logic Assembly Input Chassis Ground 48V Subpanel Assembly A1 Power-Supply Block Diagram B1 Internal-Standby Battery Exchange Assemblies Replaceable Parts Replaceable Parts Backdating Backdating Specifications Internal Standby Battery Nominal Values Supplemental CharacteristicsTime Standard Environmental Accessories Furnished Dc input connector Weight Options Available Accessories and Options Service and Support From front matter Declaration of Conformity Page Page Manual Part Number