Agilent Technologies 5962-8200 service manual Cover, Removal and Replacement

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3 - Troubleshooting

Cover, Removal and Replacement

a.Using a T15 Torx screwdriver, unscrew the two captive screws which hold the rear bezel to the dc power supply, and then remove the two screws from the bottom of the case.

b.Slide the cover backward until it clears the rear of the power supply.

A2 Interface Board, Removal and Replacement

To remove the Interface Board, proceed as follows:

a.Remove the cover of the power supply as described under, "Cover Removal and Replacement."

b.Remove the two 7 mm and two 3/16 inch hex screws that hold the GPIB and RS-232 connectors in place.

c.Slide the board forward and lift the right side of the board and slide it out.

d.Unplug the 3 conductor cable from J206. Depress the release button located at the end of the connector where the wires enter the housing.

e.Unplug the flat cables. Note the position of the conductive side for reinstallation. Connectors release the cable by pulling out end tabs as shown by the arrows in the following figure.

f.To reinstall the Interface board, perform the above steps in reverse order.

Front Panel Assembly, Removal and Replacement

This procedure removes the front panel assembly from the dc power supply.

a.Remove the Power Supply Cover as described earlier in, "Top Cover Removal and Replacement."

b.Disconnect the cable between the Front Panel board and the Interface board at the Interface board. You may have to remove the Interface board as described above to accomplish this.

c.Using a Torx T10 driver remove the screw from the right side of the supply that holds the front panel bracket to the chassis.

d Unplug the Binding Post cable.

e.Locate and carefully peel off the left vinyl trim to gain access to the side screw that secures the front panel to the chassis. Using a Torx T15 driver remove the screw located behind the vinyl trim.

f.Place the power switch in the on position and slide the switch extension forward as far as it can go and lift up to disengage from switch. Remove extension from the unit.

g.Rotate front panel forward from right side to disengage left mounting studs and pull forward.

h.To remove the right bracket, depress the plastic tab located behind the front panel in the upper right corner.

i.To reinstall the Front Panel Assembly, perform the above steps in reverse order.

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Contents Agilent Part No Microfiche No September Warranty Information CertificationSafety Summary Before Applying PowerSafety Symbol Definitions Symbol DescriptionPrinting History Instrument IdentificationTable of Contents Initialization ROM Upgrade Disassembly ProceduresPost-repair Calibration IntroductionPage Safety Considerations OrganizationRelated Documents ChapterRevisions Electrostatic DischargeManual Revisions Firmware RevisionsIntroduction Test Equipment RequiredType Specifications Recommended Model Test SetupMeasurement Techniques Test Setup Electronic LoadOperation Verification Tests Performance TestsCurrent-Monitoring Resistor ProgrammingCV Setup Constant Voltage CV TestsVoltage Programming and Readback Accuracy CV Load EffectCV Source Effect Transient Recovery TimeCV Noise Pard Constant Current CC Tests CC SetupCurrent Programming and Readback Accuracy Current Sink -CC Operation Low Range Current Readback AccuracyCC Load and Line Regulation CC Load EffectCC Source Effect CC Noise PardPerformance Test Equipment Form Load Effect Source Effect Pard Ripple and Noise Transient ResponseConstant Current Tests Current Programming and Readback Current Sink @ -3A Readback MA Range Current ReadbackVout − Load Effect Vout − Vout + 2.0mVSource Effect Vout − Iout −Vout + 4 mV Iout − Iout + 0.2 mAIout − Iout + 2.2 mA Current Sink @ -0.6A Readback Iout −Load Effect Vout − Vout + 5 mV Iout − Iout + 0.1 mAIout − Iout + 1.1 mA Current Sink @ -0.3A Readback Iout −Page Troubleshooting Overall Troubleshooting Flow ChartsTest Equipment Required for Troubleshooting Type Purpose Recommended ModelSheet 1. Troubleshooting Flowchart Sheet 2. Troubleshooting Flowchart Sheet 3. Troubleshooting Flowchart Sheet 4. Troubleshooting Flowchart Specific Troubleshooting Procedures Power-on Self-test FailuresSelf-Test Error Codes/Messages Error Code Description Probable CauseCV/CC Status Annunciators Troubleshooting Bias and Reference SuppliesBias and Reference Voltages Bias Test Point MeasurementJ307 Voltage Measurements Voltage Measurements at J207 A2 Interface to A1 Main boardDisabling Protection Features Manual Fan Speed ControlCalibration Password Inhibit Calibration SwitchPost-repair Calibration ROM Upgrade Upgrade ProcedureInitialization Identifying the FirmwareDisassembly Procedures List of Required ToolsA2 Interface Board, Removal and Replacement Cover, Removal and ReplacementFront Panel Assembly, Removal and Replacement T1 Power Transformer, Removal and Replacement A3 Front Panel Board, Removal and ReplacementA1 Main Control Board Line Voltage Wiring Power Supply Interface signals Interface SignalsConnector Signal Description A3 Front Panel Circuits A2 Interface CircuitsPrimary Interface Secondary InterfacePower Circuits A1 Main Board CircuitsControl Circuits Principles of Operation Page Chassis, Electrical Designator PartNumber Qty DescriptionReplaceable Parts List Mechanical Parts Identification Chassis, Mechanical MP9Diagrams Diagrams A2/A3 Boards Block Diagram Bias CircuitsIndex Index