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Agilent Technologies 6633B Electrostatic Discharge, Manual Revisions, Firmware Revisions

Models: 6632B 6633B 66332A 6634B

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1 - Introduction

1 - Introduction

Revisions

Manual Revisions

If changes have been made to your power supply since the publication of this manual, a yellow Manual Change sheet may be supplied with the manual. It defines the differences between your power supply and the unit described in this manual. The yellow change sheet may also contain information for correcting errors in the manual. Note that because not all changes to the product require changes to the manual, there may be no update information required for your power supply.

Firmware Revisions

You can obtain the firmware revision number by either reading the integrated circuit label, or query the dc power supply using the GPIB *IDN?' query command (See Chapter 3, ROM Upgrade).

Electrostatic Discharge

CAUTION: The dc power supply has components that can be damaged by ESD (electrostatic discharge). Failure to observe standard antistatic practices can result in serious degradation of performance, even when an actual failure does not occur.

When working on the dc power supply, observe all standard, antistatic work practices. These include, but are not limited to:

—Working at a static -free station such as a table covered with static -dissipative laminate or with a conductive table mat (Agilent P/N 9300-0797, or equivalent).

—Using a conductive wrist strap, such as Agilent P/N 9300-0969 or 9300-0970.

—Grounding all metal equipment at the station to a single common ground.

—Connecting low-impedance test equipment to static -sensitive components only when those

components have power applied to them.

—Removing power from the dc power supply before removing or installing printed circuit boards.

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Agilent Technologies 6633B, 6634B, 66332A Electrostatic Discharge, Manual Revisions, Firmware Revisions, Introduction

Contents

Dynamic Measurement DC Source System DC Power SupplyAgilent Model 66332A and Agilent Model 6632B, 6633B, 6634BLIMITATION OF WARRANTY Warranty InformationWARRANTY CERTIFICATIONDO NOT SERVICE OR ADJUST ALONE Safety SummaryBEFORE APPLYING POWER SAFETY SYMBOLSSymbol Safety Symbol DefinitionsDescription Instrument Identification Printing HistoryItem Description INTRODUCTION Table of ContentsTROUBLESHOOTING VERIFICATION AND PERFORMANCE TESTSPRINCIPLES OF OPERATION REPLACEABLE PARTS LISTDIAGRAMS INDEXPage Organization Safety ConsiderationsIntroduction Related DocumentsManual Revisions RevisionsElectrostatic Discharge Firmware RevisionsIntroduction Verification and Performance TestsTest Equipment Required 2 - Verification and Performance Tests Test SetupMeasurement Techniques Figure 2-1.Test SetupElectronic Load Operation Verification TestsPerformance Tests Current-MonitoringResistorVoltage Programming and Readback Accuracy CV SetupConstant Voltage CV Tests CV Load EffectCV Noise PARD CV Source EffectVerification and Performance Tests Constant Current CC Tests Transient Recovery TimeCC Setup Current Programming and Readback AccuracyCC Load and Line Regulation Current Sink -CCOperationLow Range Current Readback Accuracy Verification and Performance TestsCC Source Effect CC Load Effect2 - Verification and Performance Tests CC Noise PARD Performance Test Equipment FormVerification and Performance Tests Performance Test Record Forms 2 - Verification and Performance TestsVerification and Performance Tests 2 - Verification and Performance Tests Troubleshooting Introduction3 - Troubleshooting Overall TroubleshootingFlow Charts Test Equipment RequiredTroubleshooting Figure 3-1Sheet 1. Main Flowchart3 - Troubleshooting Figure 3-1Sheet 2. Main Flowchart continuedTroubleshooting Figure 3-1Sheet 3. Main Flowchart continued3 - Troubleshooting Figure 3-1Sheet 4. OV at Turn-OnTroubleshooting Figure 3-1Sheet 5. OV at Turn-Oncontinued3 - Troubleshooting Figure 3-1Sheet 6. FS Indicated but Fuse OKTroubleshooting Figure 3-1Sheet 7. No Output Voltage3 - Troubleshooting Figure 3-1Sheet 8. No Output Voltage continuedTroubleshooting Figure 3-1Sheet 9 No Output Voltage continued3 - Troubleshooting Figure 3-1Sheet 10. No Current LimitTroubleshooting Figure 3-1Sheet 11. Unit Does Not OV3 - Troubleshooting Figure 3-1Sheet 12. High Output VoltageTroubleshooting Specific Troubleshooting ProceduresPower-on Self-testFailures Table 3-2. Self-TestError Codes/Messages3 - Troubleshooting CV/CC Status Annunciators TroubleshootingBias and Rail Voltages Table 3-3.Bias and Reference VoltagesJ307 Voltage Measurements TroubleshootingManual Fan Speed Control Disabling Protection Features3 - Troubleshooting Post-repairCalibration Inhibit Calibration SwitchCalibration Password TroubleshootingInitialization ROM UpgradeUpgrade Procedure Identifying the FirmwareTroubleshooting Disassembly ProceduresList of Required Tools Figure 3-2.Component LocationFront Panel Assembly, Removal and Replacement Cover, Removal and ReplacementA2 Interface Board, Removal and Replacement 3 - TroubleshootingT1 Power Transformer, Removal and Replacement S1 Line Switch, Removal and ReplacementA3 Front Panel Board, Removal and Replacement A1 Main Control BoardFigure 3-3.Transformer Wiring Line Voltage Wiring3 - Troubleshooting Table 4-1.Power Supply Interface signals I/O Interface SignalsPrinciples of Operation IntroductionPrimary Interface A3 Front Panel CircuitsA2 Interface Circuits Secondary InterfacePrinciples of Operation Figure 4-1.A2/A3 Block DiagramA1 Main Board Circuits Power Circuits4 - Principles of Operation Figure 4-2.A1 Block Diagram Principles of OperationControl Circuits 4 - Principles of OperationPrinciples of Operation Page Introduction Replaceable Parts ListTable 5-1.Chassis, Electrical 5 - Replaceable Parts Table 5-2.Chassis, MechanicalReplaceable Parts Figure 5-1.Mechanical Parts ldentificationTable 5-3.A1 Control Board PC Board Assembly 5 - Replaceable PartsReplaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts Table 5-5.A5 AC input/RFI Board 5 - Replaceable PartsTable 5-4.Binding Post Option #020 Table 5-6.Relay Option #760Introduction DiagramsGeneral Schematic Notes Table 6-1. Model-dependentComponentsDesignator 6 - DiagramsTable 6-1. Model-dependentComponents continued 66332ADiagrams Table 6-2.A1 Board Component Locations6 - Diagrams Table 6-2continuedFigure 6-1.A1 Board Component Locations Figure 6-2.A4 and A6 Board Component Locations Figure 6-3.A1 Board schematic sheet A1 Board schematic sheet A1 Board schematic sheet Figure 6-4.A6 Relay Option Board schematic Index Page Manual Updates