Agilent E3631A Welding System Manual - Chapter 5 Service Self-Test Procedures

Chapter 5 Service

Self-Test Procedures

	Self-Test Procedures
	Power-On Self-Test
	Each time the power supply is powered on, a set of self-tests are performed.
	These tests check that the minimum set of logic and measurement hardware
	are functioning properly. The power-on self-test performs checks 601 through
	604 and 624 through 634.
	Complete Self-Test
	Hold any front panel key except the "Error'' key for more than 5 seconds while
	turning on the power to perform a complete self-test. The power supply beeps
	when the test starts. The tests are performed in the order shown below.
601	Front Panel Does not respond The main controller U17 on the top board
	attempts to establish serial communications with the front panel controller U7
	on the front panel board. During this test, U7 turns on all display segments.
	Communication must function in both directions for this test to pass. If this
	error is detected during power-on self-test, the power supply will beep twice.
	This error is only readable from the remote interface.
602	RAM read/write failed This test writes and reads a 55h and AAh checker
	board pattern to each address of ram U15 on the top board. Any incorrect
	readback will cause a test failure. This error is only readable from the remote
	interface.
603	A/D sync stuck The main controller issues an A/D sync pulse to U17 and U16
	on the top board to latch the value in the ADC slope counters. A failure is
	detected when a sync interrupt is not recognized and subsequent time-out
	occurs.
604	A/D slope convergence failed The input amplifier is configured to the
	measure zero (MZ) state in the 10 V range. This test checks whether the ADC

integrator produces nominally the same number of positive and negative slope decisions (±10%) during a 20 ms interval.

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Agilent Technologies E3631A manual Power-On Self-Test, Complete Self-Test, Service Self-Test Procedures

Contents

Service Guide 3DUW1XPEHU $SULO Convenient bench-top features Flexible system features Front Panel at a Glance Before performing calibration Front-Panel Voltage and Current Settings T e Display Annunciators Rear Panel at a Glance This Book Page Contents Service Contents Calibration ProceduresTheory of Operation Backdating Schematics Contents ServiceReplaceable Parts Contents Specifications Specifications Performance Specifications Specifications Performance Specifications Specifications Performance Specifications Supplemental Characteristics Voltage Programming Speed Specifications Supplemental Characteristics Dimensions of Agilent E3631A Power Supply Specifications Supplemental Characteristics Quick Start Quick Start To prepare the power supply for use Quick Start To prepare the power supply for useConnect the power cord and turn on the power supply Enable the outputs 100 or 115 Vac, 2.5 AT fuse 230 Vac, 2 AT fuse Quick Start To check the rated voltages of the power supply To check the rated voltages of the power supplyTurn on the power supply Check the voltage function for the -25V supply Quick Start To check the rated currents of the power supply To check the rated currents of the power supplyAdjust the voltage limit value to 1.0 volt Check the current function for the +25V supply Check the current function for the -25V supply Set the display for the limit mode To use the power supply in constant voltage modeConnect a load to the desired output terminals Adjust the knob for the desired output voltage Return to the meter mode To use the power supply in constant current mode Quick Start To use the power supply in constant current mode Adjust the knob for the desired output current Verify that the power supply is in the constant current mode Quick Start To use the power supply in track mode To use the power supply in track modeVerify that ±25V supplies track each other properly Set up the power supply for the desired operating state Turn on the storage modeTo store and recall the instrument state Quick Start To store and recall the instrument state Restore the operating state Turn on the recall modeRecall the stored operating state To rack mount the power supply To rack mount the power supply Quick Start To rack mount the power supply Calibration Procedures Calibration Procedures Agilent Technologies Calibration Services Calibration Interval Automating Calibration Procedures Recommended Test Equipment U t i o n Calibration Procedures Test Considerations Test Considerations Calibration Procedures Performance Verification Tests Performance Verification TestsSelf-Test Performance Verification Tests Setup for Most Tests Measurement Techniques Current-Monitoring Resistor Constant Voltage Test Setup Calibration Procedures Constant Voltage CV VerificationsConstant Voltage CV Verifications Voltage Programming and Readback Accuracy MEASVOLT? P6VP25VN25V CV Load Regulation CV Line Regulation Normal Mode Voltage Noise CV Ripple and Noise Common Mode Current Noise Load Transient Response Time Constant Current Test Setup Calibration Procedures Constant Current CC VerificationsConstant Current CC Verifications Current Programming and Readback Accuracy MEASCURR? P6VP25VN25V CC Load Regulation CC Line Regulation Normal Mode Current Noise CC Ripple and Noise Performance Test Record for Agilent E3631A CV Performance Test Record CC Performance Test Record Calibration Procedures Calibration Security Code Calibration Security Code Turn on the front-panel calibration mode To Unsecure the Power Supply for CalibrationMove to the security code by pressing the Secure key Turn off the calibration mode Unsecured To Unsecure the Power Supply Without the Security Code Calibration Count Calibration Procedures Calibration CountCalibration Message General Calibration/Adjustment Procedure Cal mode Hi +5.7000v Lo +0.099 a Lo +0.100 aHi +4.750 a Cal setup Hi +4.999 a Calibration Procedures Aborting a Calibration in Progress Aborting a Calibration in Progress Calibration Procedures Calibration Record for Agilent E3631A Calibration Record for Agilent E3631A Error Messages Calibration Procedures Error MessagesSystem Error Messages Self-Test Error MessagesPage Calibration Procedures Calibration Program Calibration Program END if Output Calibration Procedures Calibration Program Theory of Operation Theory of Operation Block Diagram Overview Theory of Operation Block Diagram Overview Block Diagram AC Input and Bias Supplies Theory of Operation AC Input and Bias Supplies Floating Logic Theory of Operation Floating Logic Serck Xfpsk To-A Converter Theory of Operation To-A Converter To-D Converter Theory of Operation To-D Converter Power Mesh and Control Theory of Operation Power Mesh and Control Theory of Operation Power Mesh and Control Front Panel Earth-Referenced LogicTheory of Operation Earth-Referenced Logic Service Service Operating Checklist Is the Power Supply Inoperative?Does the Power Supply Fail Self-Test? Service Operating Checklist Types of Service Available Standard Repair Service worldwideService Types of Service Available Express Exchange U.S.A. only Service Repacking for Shipment Repacking for Shipment Electrostatic Discharge ESD Precautions To Replace the Power-Line FuseService Electrostatic Discharge ESD Precautions Surface Mount Repair Troubleshooting Hints Unit Reports Errors 740 toService Troubleshooting Hints Unit is Inoperative Bias Supplies Problems Self-Test Procedures Power-On Self-TestService Self-Test Procedures Complete Self-Test 100 101 Service Self-Test Procedures 102 Replaceable Parts To Order Replaceable Parts E3631-60002 Top PCB Assembly 106 107 108 109 110 E3631-60003 VFD Assembly CR1 CR2 E3631-60004 Bottom PCB Assembly E3631-60004 Bottom PCB Assembly 113 114 115 E3631-60005 Front Frame Assembly E3631-60005 Power SupplyAssembly Manufacturer’s List Manufacturer’s List 118 Backdating Lqfoxghglqwklvfkdswhu Schematics ‡ &RPSRQHQW/RFDWRUSDJH ‡ $&DQG$&6FKHPDWLFSDJHPage Page Page Page Page Page Page Page Page Page Warranty