Agilent Technologies E3616A, E3614A, E3617A, E3615A service manual Replaceable Parts

Page 26

Table A-7. Overvoltage Protection Circuit Troubleshooting

STEP

ACTION

 

RESPONSE

 

PROBABLE CAUSE

 

 

 

 

 

1

Short U19 pin 4 to TP6.

a.

Shutdown release

a. U20 defective or C57

 

 

 

(OVP indicator OFF)

 

shorted.

 

 

b.

Output voltage remains

b.

Proceed to step 2.

 

 

 

shutdown(0 V)

 

 

 

 

 

 

 

2

Measure the voltage from

a.

High voltage (+5 V)

a. U19 defective or proceed step 3.

 

TP6(common) to TP9.

b.

Low voltage (0 V)

b.

U4D defective.

 

 

 

 

 

3

Measure the voltage from

a.

Below +2.6 V

a. U12 or U8 defective

 

TP6(common) to TP8.

b.

Above +2.6 V

b.

U18 defective

 

 

 

 

 

 

REPLACEABLE PARTS

INTRODUCTION

This section contains information for ordering replacement parts. Table A-10 lists parts by reference designators and pro- vides the following information:

a.Reference designators. Refer to Table A-8.

b.Agilent Technologies Part Number.

c.Total quantity used in that assembly.

d.Description.

e.Manufacturer's supply code number. Refer to Table A-9 for manufacturer's name and address.

f.Manufacturer's part number or type.

Mechanical and miscellaneous parts are not identified by ref- erence designator.

 

Table A-8. Reference Designators

 

 

A

Assembly

C

Capacitor

CR

Diode

DS

Signaling Device(light)

F

Fuse

G

Pulse Generator

J

Jack

L

Inductor

Q

Transistor

R

Resistor

S

Switch

T

Transformer

TP

Test Point

VR

Zener Diode

U

Integrated Circuit

W

Wire

 

 

ORDERING INFORMATION

To order a replacement part, address order or inquiry to your local Agilent Technologies sales office (see lists at rear of this manual for addresses). Specify the following information for each part: Model, complete serial number of the power supply; Agilent Technologies part number; circuit reference designator; and description.

Table A-9. Code List of Manufacturers

CODE

MANUFACTURER

ADDRESS

 

 

 

01295

Texas Instruments Inc, Semicon Comp Div.

Dallas, TX

14936

General Instruments Corp, Semicon Prod

Hicksville, N.Y.

27014

National Semiconductor Corporation

Santa Clara, CA

28480

Agilent Technologies

Palo Alto, CA

04713

Motorola Semiconductor Products

Phoenix, AZ

32997

Bourns Inc.

Riverside, CA

34371

Harris Corp.

Melbourne, FL

 

 

 

A-12

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Contents Agilent E361xA 60W Bench Series DC Power Supplies AprilSafety Summary Operating Instructions General Information Temperature Coefficient Operating Temperature RangeMeter Programming Resolution Line FuseInput Power Requirements InstallationInstallation Data Initial InspectionOperating Instructions TURN-ON Checkout ProcedurePower Cord Operating Modes Local Operating ModeConnecting Loads Operation Beyond Rated OutputRemote Analog Voltage Programming Remote Operating ModesRemote Voltage Sensing AUTO-PARALLEL Operation MULTIPLE-SUPPLY OperationNormal Parallel Operation Normal Series Operation Gramming according to the remote-programming instructionsAUTO-SERIES Operation Total output voltage to ground must not exceed 240 VdcAUTO-TRACKING Operaton = slave output voltageLoad Considerations Service Information Operation Verification Tests MaintenanceTest Equipment Required Measurement Techniques Type Required Characteristics USE Recommended ModelPerformance Tests Line Regulation Source Effect Constant Voltage CV TestsLoad Regulation Load Effect Load Transient Response TimePARDPeak-to-Peak Measurement PARDRipple and NoisePardrms Measurement Constant Current CC Tests CV Drift StabilityAdjustment and Calibration Procedure CC Drift StabilityReference and Bias Circuit TroubleshootingOverall Troubleshooting Procedure Regulating Loop TroublesSymptom Checks and Probable Causes Overvoltage Protection Circuit TroublesStep Action Response Probable Cause Step Measure Response Probable Cause Replaceable Parts Table A-10. Replaceable Parts List Table A-10. Replaceable Parts List Contd R28,111 0698-3228 Resistor 49.9K +-1% .125W TF TC=0+-100 RESISTOR-VAR 10K +-10% ALL IC V RGLTR-FXD-POS 4.8/5.2V TO-220 PKG ALL DIODE-GEN PRP 180V 200MA DO-35 ALL Table A-11. Component Value Model Page Page Page Page Manual Supplement Constant Voltage Mode T EAlternative Voltage Programming Using Resistors Programming Voltage Common to the Minus OutputProgramming Voltage Common to the Minus Output Constant Current Mode Constant Current with Voltage ProgrammingCurrent Monitoring Remote Resistor Programming Connections Remote Resistor Programming, Constant VoltageRemote Resistor Programming, Constant Current Certification Declaration of Conformity