Agilent Technologies 5071A manual Top-Level Diagnostic Tree Organization, First Power On

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Assembly-Level Service

Service

Figure 2-1. Instrument Top View

Option 048: The “Batteries (Hidden behind battery door)”callout is changed to:

48 Vdc Input Terminals and Fuse

Top-Level Diagnostic Tree Organization

Warning Message Diagnostic Tree (Diagnostic Subsection 4)

Option 048: On page 2-15, item number “1.4.4 Power Source is Batt” is deleted and item “1.4.4.1” is changed to 1.4.4.

Top-Level Diagnostic Tree (Diagnostic Section 1)

1.0.0First Power On

Option 048: Step 3 text is changed:

Ensure that the rear-panel dc-line fuse holder has a good fuse of the correct rating.

Step 6 text is changed:

Power on the 5071A by applying dc or ac power.

The If No response to the QUESTION: is changed:

Disconnect power immediately and check the appropriate rear-panel power fuse.

If fuse is intact, Go to, 1.0.1.1.0.

If fuse is blown, Go to, 2. 1. 1. 1. 0 (Power Supply Diagnostic Tree.)

Step 1. 0. 1. 1. 0 is added below:

1.0.1.1.0 DC Input 1 and 2 Power Steering Circuit Check

Use the DC Input 1 and 2 Power Steering Circuit Schematic (Figure 2-1.) located on page 17 of this chapter to troubleshoot the dc power input steering function.

QUESTION: Is the DC input power steering circuit functional? (48V Subpanel Assembly, Option 048)

If Yes: Go to, 1. 0. 1. 1.

If No: Replace the 48V Subpanel Assembly, (part number 05071-60277) and retest.

2-4

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Contents 7HOHFRPPXQLFDWLRQV2SWLRQV Page Telecommunications Options Supplemental Manual Before Cleaning Manual Updating Changes 05071-90042, December Contents Service Supplemental Characteristics Available Accessories and OptionsContents How to Use This Manual Instrument IdentificationInstruments Covered by This manual How to Order ManualsManual Organization Operating and Programming 5071A Major Features IntroductionIntroducing the 5071A Operating The 5071AConnectors Getting Started5071A at a Glance Rear-Panel Connections5071A Rear Panel Connections Fuse Powering Down the 5071A Starting The 5071APerforming Basic Tasks Synchronizing to an External 1 PPS ReferenceDisabling the Internal -Standby Battery Using the 5071AMonitoring Status Front-Panel Indicators and Messages Rear-Panel Output ConnectorsCase of Difficulty Restarting the 5071A5071A Command References 5071A Command SummaryScpi Subsystem Commands Scpi CommandsSpecifications Installation Power RequirementsOperating the 5071A From External Dc Power Preparation for UseInternal Standby Battery Maintenance Replacing the External Dc Input Power FuseLong-Term Storage Preparing the RP 5071-A For External-Dc Operation Assembly-Level Service Performance Tests Rear-Panel Output Signal Checks5071A Operational Verification Assembly Identification and Location ServiceOption Top-Level Diagnostic Tree Diagnostic Section Top-Level Diagnostic Tree OrganizationFirst Power On Warm-up and Fatal Error Diagnostic Tree Power-Supply Diagnostic Tree Advisory Messages SubsectionAc-Line Fuse Fault Isolation r/o LF1/T1 4.0.0 Ext. Dc Input Fuse FaultNo Operation From Internal Standby Battery Internal-Battery Charger TestAssembly/Module Diagnostic Trees Diagnostic Section A8 Diagnostic Tree A/M Subsection 3 1 PPS Outputs Test4 A8 Front/Rear-Panel Sync Input Test 5 A8-to-Chassis Interconnect Test6.0 A9 J4 80-MHz Signal Test A9 Diagnostic Tree A/M Subsection 5.0 A9 Mon Signal Test4.1 A9-to-Chassis TCO Option signal Interconnect Test Theory of Operation IntroductionSimplified Functional Description A1 Motherboard Circuit DescriptionFunctional Block Descriptions Power Supply BlockInput/Output Block Operating Firmware Warning Mode Instrument Control BlockReference Oscillator/RF-Chain Block Interconnections Power Supply Block Overvoltage Protection Circuit A1 Motherboard Circuit DescriptionExternal Dc Input Circuit A11 Power Steering Logic Assembly A1 Power Supply/Distribution Schematic Diagram48V Subpanel Assembly Input Chassis GroundB1 Internal-Standby Battery A1 Power-Supply Block DiagramReplaceable Parts Exchange AssembliesReplaceable Parts Backdating Backdating Specifications Supplemental Characteristics Internal Standby Battery Nominal ValuesTime Standard EnvironmentalWeight Accessories Furnished Dc input connectorAvailable Accessories and Options OptionsService and Support From front matter Declaration of Conformity Page Page Manual Part Number