Agilent-technologies 6613C Manual de usuario Pagina 1

Service Manual For Agilent Model 6611C, 6612C, 6613C, 6614C System DC Power Supply s1 Agilent Part No. 5962-8200

1 - Introduction 10Revisions Manual Revisions If changes have been made to your power supply since the publication of this manual, a yellow Manual Ch

112Verification and Performance TestsIntroductionThis document contains test procedures to verify that the dc power supply is operating normally and i

2 - Verification and Performance Tests12Table 2-1. Test Equipment Required for Verification and Performance TestsType Specifications Recommended Model

Verification and Performance Tests - 2 13Figure 2-1. Test Setup Electronic Load Many of the test procedures require the use of a variable load ca

2 - Verification and Performance Tests 14Current-Monitoring Resistor To eliminate output-current measurement error caused by voltage drops in the le

Verification and Performance Tests - 2 15Constant Voltage (CV) Tests CV Setup If more than one meter or if a meter and an oscilloscope are used, c

2 - Verification and Performance Tests 16CV Source Effect This test measures the change in output voltage that results from a change in ac line volt

Verification and Performance Tests - 217tttttvLoadingTransientUnloadingTransientvtFigure 2-2. Transient Waveforma. Turn off the supply and connect the

2 - Verification and Performance Tests 18c. Divide the voltage drop (DVM reading) across the current monitoring resistor by its resistance to conver

Verification and Performance Tests - 219CC Load and Line RegulationThese tests (CC Load Effect and CC Source Effect given below) are tests of the dc r

2Warranty InformationCERTIFICATIONAgilent Technologies certifies that this product met its published specifications at time of shipment from the facto

2 - Verification and Performance Tests20CC Source EffectThis test measures the change in output current that results when the AC line voltage changes

Verification and Performance Tests - 221Performance Test Equipment FormTest Facility:_________________________Report Number _________________________

2 - Verification and Performance Tests 22Performance Test Record Form Model Agilent 6611C Report No _______________ Date __________________ Test

Verification and Performance Tests - 2 23 Model 6612C Report No _______________ Date __________________ Test Description Minimum Specs. Result

2 - Verification and Performance Tests 24 Model Agilent 6613C Report No _______________ Date __________________ Test Description Minimum Specs.

Verification and Performance Tests - 225Model Agilent 6614C Report No _______________ Date __________________Test Description Minimum Specs. Results*

273TroubleshootingIntroductionWARNING: SHOCK HAZARD. Most of the troubleshooting procedures given in this chapter areperformed with power applied and

3 - Troubleshooting28Test Equipment RequiredTable 3-1 lists the test equipment required to troubleshoot the power supply. Recommended models arelisted

Troubleshooting - 329Figure 3-1 Sheet 1. Troubleshooting FlowchartTurn on unit and observe thedisplay. All of the segments andannunciators, the addres

3Safety SummaryThe following general safety precautions must be observed during all phases of operation of this instrument. Failure to complywith thes

3 - Troubleshooting30Figure 3-1 Sheet 2. Troubleshooting FlowchartEnable output andprogram voltage andcurrent full scale with noload. Measure outputvo

Troubleshooting - 331Figure 3-1 Sheet 3. Troubleshooting FlowchartFrom Sheet 2Program current to fullscale, voltage to Vmaxand load to the powersupply

3 - Troubleshooting32Figure 3-1 Sheet 4. Troubleshooting FlowchartFrom Sheet 3Connect controller to theHPIB port and sendcommands to set theoutput vol

Troubleshooting - 333Specific Troubleshooting ProceduresPower-on Self-test FailuresThe power-on self-test sequence tests most of the digital and DAC c

3 - Troubleshooting34E221 Front Panel comm UART framing error A3 Front Panel/Display BdE222 Front Panel comm UART parity error A3 Front Panel/Display

Troubleshooting - 335J307 Voltage MeasurementsCable W9 connects J307 of the A1 Main Board Assembly to J207 of the A2 Interface Assembly. Table 3-4prov

3 - Troubleshooting36Manual Fan Speed ControlUnder some circumstances such as testing acoustical devices where the fan noise would interfere with thet

Troubleshooting - 337Post-repair CalibrationCalibration is required annually and whenever certain components are replaced. If either A1 or A2 arerepla

3 - Troubleshooting38InitializationThe dc power supply's GPIB address and model number as well as other constants which are required toprogram a

Troubleshooting - 339Disassembly ProceduresThe following paragraphs provide instructions on how to disassemble various components of the dc powersupp

4Safety Symbol DefinitionsSymbol DescriptionDirect currentAlternating currentBoth direct and alternating currentThree-phase alternating currentEarth (

3 - Troubleshooting40Cover, Removal and Replacementa. Using a T15 Torx screwdriver, unscrew the two captive screws which hold the rear bezel to the dc

Troubleshooting - 341A3 Front Panel Board, Removal and ReplacementFirst remove the front panel assembly as described under, "Front Panel Assembl

3 - Troubleshooting42Line Voltage WiringFigure 3-3 illustrates the primary wiring configuration of the power transformer for various ac line voltages.

434Principles of OperationIntroductionThis section describes the different functional circuits used in the dc power supply. First, the I/O externalsig

4 - Principles of Operation44A3 Front Panel CircuitsAs shown in Figure 6-3, the supply's front panel assembly contains a circuit board, a keypad,

Principles of Operation - 445The EEPROM (electrically erasable programmable read-only memory) chip on the A2 interface boardstores a variety of data a

4 - Principles of Operation46As shown in Figure 6-2, the ac input rectifier and filter converts ac input to a dc level. The output regulatorregulates

Principles of Operation - 447When the downprogramming stage is turned on (in either CV or CC mode), the CV/CC control circuitcauses the Control signal

495Replaceable Parts ListIntroductionThis section lists the replaceable parts for all models. Refer to Figures 5-1 and 5-2 for thelocation of mechanic

5Notice The information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with reg

5 - Replaceable Parts List50W-3 5063-4825 1 Secondary Power Cable (T1 to J306)W-4 5063-3479 1 Secondary Bias Cable (T1 to J305)W-5 5063-3481 1 Output

Replaceable Parts List - 551Figure 5-1. Mechanical Parts Identification

5 - Replaceable Parts List52Table 5-2. Chassis, MechanicalDesignator Part_Number Qty DescriptionMP1 5001-9873 1 ChassisMP2 5063-3413 1 Front PanelMP3

536DiagramsIntroductionThis chapter contains drawings and diagrams for troubleshooting and maintaining the Agilent Model6611C, 6612C, 6613C and 6614C

6 - Diagrams54Figure 6-2. A1 Board Block Diagram

Diagrams - 655Figure 6-3. A2/A3 Boards Block Diagram

6 - Diagrams56Figure 6-4. Rail and Bias CircuitsJ304RedBlack1213+ RAIL- RAILRAIL_CTJ305F306F303123+15V Sec-15V SecTo Fan Circuit+5V SecSec ComU304U307

57Index—+—+OUT, 43+sense, 43—A—A1 block diagram, 54A1 board removal, 41A1 Main board, 45A1 test point locations, 53A2 board removal, 40A2 Interface Bo

Index58—M—manual revisions, 10—N—notice, 5—O—-OUT, 43out of range, 37OV_Detect*, 44, 47OV_Prog, 45OV_SCR*, 44, 46—P—PARD, 16, 20password, 37performanc

Manual UpdatesThe following updates have been made to this manual since the original print date.4/25/03Information about serial numbers and manual rev

6Table of ContentsWarranty Information 2Safety Summary 3Notice 4Printing History 5Instrument Identification 5Table of Contents 6INTRODUCTION 9Organiza

7CV/CC Status Annunciators Troubleshooting 34Bias and Reference Supplies 34J307 Voltage Measurements 35Manual Fan Speed Control 36Disabling Protectio

91IntroductionOrganizationThis manual contains information for troubleshooting and repairing Agilent Models 6611C, 6612C, 6613C and6614C System DC Pow