Agilent Technologies 6632B, 6634B, 66332A, 6633B service manual Sheet 11. Unit Does Not OV

Page 35

Program the output voltage and current to the full scale value and the OV to 1/2.

OV_prog ~+2V @

 

 

 

 

A2 Interface Board or

 

 

No

 

 

 

 

 

 

cable W7 defective

 

R350

 

 

 

 

 

 

 

 

 

 

 

 

 

?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U306B-8

 

 

 

 

Check R350, C335 and

 

 

No

 

 

 

 

 

 

U306B

 

~+2V

 

 

 

 

 

 

 

 

 

 

 

 

 

?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

U306B-7

 

 

 

 

 

 

 

 

 

 

 

 

Check R349, R351,

 

 

No

 

 

 

~+4V

 

 

 

R356, C336 and U306

 

 

 

 

 

 

 

 

 

?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

U306B-2,

 

 

 

 

 

 

 

 

 

 

 

 

Check U306B

 

 

OV_DETECT*,

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

See note

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Troubleshooting - 3

Reset the OV (Shift, Prot Clr) and observe the OV_SCR* signal. Each time OV is reset the unit will generate another OV signal. The OV pulse (OV_SCR*)

is approximately 5us long.

OV_SCR* pulse @

R438 low 5us

?

Yes

Q318D Collector pulses high 5us

?

No

No

Check Q318B, R441, A2 Interface Board

Check Q318A, B and D and associated circuits

Yes

Check A1CR342

Figure 3-1 Sheet 11. Unit Does Not OV

35

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Contents Agilent Part No Microfiche No October Certification Warranty InformationBefore Applying Power Safety SummarySymbol Description Safety Symbol DefinitionsItem Description Printing HistoryInstrument Identification Table of Contents Post-repair Calibration Initialization ROM UpgradeDisassembly Procedures Introduction General Schematic Notes BackdatingPage Chapter Safety ConsiderationsOrganization Related DocumentsFirmware Revisions RevisionsElectrostatic Discharge Manual RevisionsBuilt-in Self Tests Type Specifications Recommended ModelIntroduction Test Equipment RequiredMeasurement Techniques Test SetupCurrent-Monitoring Resistor Operation Verification TestsPerformance Tests Electronic LoadCV Load Effect CV SetupConstant Voltage CV Tests Voltage Programming and Readback AccuracyCV Noise Pard CV Source EffectCurrent Programming and Readback Accuracy Transient Recovery TimeCC Setup Constant Current CC TestsCC Load and Line Regulation Current Sink -CC OperationLow Range Current Readback Accuracy CC Source Effect CC Load EffectCC Noise Pard Performance Test Equipment FormPerformance Test Record Forms − 4 mV + 4 mV Iout + 0.29 mA Model Agilent 6634B Report No Date Test Description MinimumVout − 12 mV Vout − 42 mVTroubleshooting Type Purpose Recommended Model Overall TroubleshootingFlow Charts Test Equipment Required for TroubleshootingSheet 1. Main Flowchart Sheet 2. Main Flowchart Sheet 3. Main Flowchart Sheet 4. OV at Turn-On Sheet 5. OV at Turn-On Sheet 6. FS Indicated but Fuse OK Sheet 7. No Output Voltage Sheet 8. No Output Voltage Sheet 9 No Output Voltage Sheet 10. No Current Limit Sheet 11. Unit Does Not OV Sheet 12. High Output Voltage Error Code Description Probable Cause Specific Troubleshooting ProceduresPower-on Self-test Failures Self-Test Error Codes/MessagesBias Test Point Common Measurement CV/CC Status Annunciators TroubleshootingBias and Rail Voltages Bias and Reference VoltagesVoltage Measurements at J307 A2 Interface to A1 Main board J307 Voltage MeasurementsManual Fan Speed Control Disabling Protection FeaturesPost-repair Calibration Inhibit Calibration SwitchCalibration Password Identifying the Firmware ROM UpgradeUpgrade Procedure InitializationList of Required Tools Disassembly ProceduresRemote sense leads before attempting disassembly Front Panel Assembly, Removal and Replacement Cover, Removal and ReplacementA2 Interface Board, Removal and Replacement A1 Main Control Board S1 Line Switch, Removal and ReplacementA3 Front Panel Board, Removal and Replacement T1 Power Transformer, Removal and ReplacementTransformer Wiring Line Voltage WiringConnector Signal Description Interface SignalsPower Supply Interface signals Secondary Interface A3 Front Panel CircuitsA2 Interface Circuits Primary InterfaceA2/A3 Block Diagram A1 Main Board Circuits Power CircuitsA1 Block Diagram Control Circuits Principles of Operation Page Designator Model PartNumber Qty Description Chassis, ElectricalDesignator Model Part Number Qty Description Chassis, MechanicalMechanical Parts ldentification A1 Control Board PC Board Assembly Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Replaceable Parts Relay Option #760 Binding Post Option #020A5 AC input/RFI Board Model-dependent Components General Schematic NotesDiagrams A1 Board Component Locations R434 825 R500 175 325 R435 R505 A1 Board Component Locations A4 and A6 Board Component Locations A1 Board schematic sheet A1 Board schematic sheet A1 Board schematic sheet A6 Relay Option Board schematic Index Index Manual Updates
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6632B, 6633B, 66332A, 6634B specifications

Agilent Technologies, a leader in electronic test and measurement solutions, offers a range of power supplies designed to meet various application needs. Notable models include the 6632B, 6634B, 66332A, 6633B, and 6612C. Each of these units provides unique features and technologies that cater to researchers, engineers, and technicians in the industry.

The Agilent 6632B is a single-output DC power supply that delivers up to 30V and 3A. It is known for its excellent load regulation and low noise, making it ideal for sensitive electronic testing. The model includes built-in voltage and current measurement capabilities, allowing users to monitor output conditions in real time. The 6632B is commonly used in laboratory environments, educational institutions, and manufacturing lines.

Moving to the 6634B, this model offers dual-output capabilities with a maximum output of 30V and 6A. This versatility enables simultaneous powering of two different devices or circuit sections. It also features parallel and series operation options, allowing users to create a custom power supply configuration for specific applications. With a programmable interface, the 6634B simplifies test automation, ensuring efficiency in extensive testing scenarios.

The Agilent 66332A stands out with its precision and high performance. This power supply provides three outputs—two programmable and one fixed—yielding flexible power configurations. Its intuitive user interface allows easy adjustment of voltage and current settings. The device is equipped with extensive protection features to safeguard both the power supply and the connected load against faults. It is an excellent choice for complex testing setups that require reliable power.

The 6633B model offers a high-performance power supply with dual outputs, similar to the 6634B but with enhanced specifications. It can provide up to 40V and 2A per channel, delivering precision for demanding applications. This model is particularly suited for industries focused on high-reliability applications, such as telecommunications and aerospace.

Lastly, the Agilent 6612C is a compact and lightweight power supply providing single-output up to 60V and 2A. This model is designed for simplicity and ease of use, making it an excellent choice for portable applications. The 6612C’s unique characteristics include a compact design and user-friendly controls, which facilitate operation in field settings.

In summary, Agilent Technologies’ power supply models—6632B, 6634B, 66332A, 6633B, and 6612C—offer an array of features that cater to a wide range of testing and research needs, ensuring reliable power delivery in various contexts.
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