Keysight E4990A Troubleshooting Manual
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Keysight E4990A Troubleshooting Manual

Keysight E4990A Troubleshooting Manual

Impedance analyzer
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Keysight E4990A 
Impedance Analyzer
Troubleshooting
Guide

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Summary of Contents for Keysight E4990A

  • Page 1 Keysight E4990A  Impedance Analyzer Troubleshooting Guide...
  • Page 2 Impedance Analyzer...
  • Page 3 Notices Warranty © Keysight Technologies 2014 - 2015 duplication or disclosure of Software is subject to Keysight Technologies’ No part of this manual may be repro- The material contained in this doc- standard commercial license terms, duced in any form or by any means ument is provided “as is,”...
  • Page 4 Caution Do not exceed the operating input power, voltage, and current level and signal type appropriate for the instrument being used, refer to your instrument's Function Reference. Electrostatic discharge (ESD) can damage the highly sensitive microcircuits in your instrument. ESD damage is most likely to occur as the test fixtures are being connected or disconnected.
  • Page 5 When you notice any of the unusual conditions listed below, immediately terminate operation and disconnect the power cable. Contact your local Keysight Technologies sales representative or authorized service company for repair of the instrument. If you continue to operate without repairing the instrument, there is a potential fire or shock hazard to the operator.
  • Page 6 Manufacturer’s Declaration Herstellerbescheinigung GERA­ USCHEMISSION LpA < 70 dB am Arbeitsplatz normaler Betrieb nach DIN 45635 T. 19 Manufacturer's Declaration ACOUSTIC NOISE EMISSION LpA < 70 dB operator position normal operation per ISO 7779 Impedance Analyzer...

  • Page 7: Regulatory Compliance Information

    This product complies with the essential requirements of the following applicable European Directives, and carries the CE marking accordingly: • The Low Voltage Directive 2006/95/EC • The EMC Directive 2004/108/EEC To obtain Declaration of Conformity, please contact your local Keysight Technologies sales office, agent or distributor. Impedance Analyzer...

  • Page 8: Safety Notice Supplement

    • This equipment is a POLLUTION DEGREE 2, INDOOR USE product. • This equipment is tested in stand-alone condition and in combination with the accessories supplied by Keysight Technologies against the requirement of the standards described in the Declaration of Conformity. If it is used as a...
  • Page 9 The E4990A complies with INSTALLATION CATEGORY II as well as NOT E POLLUTION DEGREE 2 in IEC61010-1. The E4990A is an INDOOR USE product. The LEDs in the E4990A are Class 1 in accordance with IEC60825-1, NOT E CLASS 1 LED PRODUCT. • Ground the Instrument To avoid electric shock, the instrument chassis and cabinet must be grounded with the supplied power cable’s grounding...
  • Page 10 ensure that safety features are maintained in operational condition. • Dangerous Procedure Warnings Warnings, such as the example below, precede potentially dangerous procedures throughout this manual. Instructions contained in the warnings must be followed. Dangerous voltage levels, capable of causing death, are present in this WA RNING instrument.
  • Page 11 Safety Symbols General definitions of safety symbols used on the instrument or in manuals are listed below. Instruction Manual symbol: the product is marked with this symbol when it is necessary for the user to refer to the instrument manual. Alternating current.
  • Page 12 Certification Keysight Technologies certifies that this product met its published specifications at the time of shipment from the factory. Keysight Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institution’s calibration facility or by the calibration facilities of other International Standards Organization members.
  • Page 13 E4990A help. It allows you to get information about the selected softkey by pressing the Help key in the E4990A or by pressing F1 in a keyboard attached to the E4990A or by clicking the help button in a dialog box. With context sensitive help, users can receive information quickly about the area the user is working in the firmware of the E4990A.
  • Page 14 This chapter provides the procedure to isolate a faulty assembly in the E4990A. Chapter 2, "Post Repair Procedure" This chapter lists the procedures required to verify the E4990A operation after an assembly is replaced with a new one. Impedance Analyzer...
  • Page 15 Impedance Analyzer...

  • Page 16: Table Of Contents

    Contents Regulatory Compliance Information Safety Notice Supplement Troubleshooting Introduction How to exit from the E4990A Measurement View To Troubleshoot the Instrument Primary Trouble Isolation No Display Troubleshooting Booting Process Troubleshooting Troubleshooting Using Diagnostic Test Diagnostic Test Function Specific Troubleshooting To Check the Front Panel...
  • Page 17 Network Analyzer...

  • Page 18: Troubleshooting

    Impedance Analyzer Troubleshooting Guide Troubleshooting Introduction How to exit from the E4990A Measurement View To Troubleshoot the Instrument No Display Troubleshooting Booting Process Troubleshooting Troubleshooting Using Diagnostic Test Function Specific Troubleshooting Performance Test failure Troubleshooting This chapter provides the procedure to isolate a faulty assembly in...

  • Page 19: Introduction

    Troubleshooting Introduction These servicing instructions are for use by qualified personnel only. To WA RNING avoid possible electrical shock, do not perform any servicing unless you are qualified to do so. The opening of covers or removal of parts are likely to expose dangerous WA RNING voltages.

  • Page 20: How To Exit From The E4990A Measurement View

    Measurement View to Windows desktop. If you want to return to the Measurement View, double-click the” E4990A” NOT E icon on the desktop. if you need to shut down the E4990A, press the standby switch on the NOT E front panel. Impedance Analyzer...

  • Page 21: To Troubleshoot The Instrument

    Figure 10, “E4990A Application view,” on page Step 2. Check the display. • If no display appears on the LCD after the E4990A is turned on, go to “No Display Troubleshooting" on page • If the E4990A stops during booting process despite something being displayed on the LCD, go to “Booting Process...
  • Page 22 Troubleshooting Figure 2 Primary trouble isolation flowchart Impedance Analyzer...

  • Page 23: No Display Troubleshooting

    Troubleshooting No Display Troubleshooting If the E4990A displays nothing despite being powered from proper ac power line, isolate the failure in accordance with the procedure shown in Figure Connect the keyboard to the E4990A rear panel connector and start trouble isolation. The methods of trouble isolation are described in the procedural step 1 to 6.
  • Page 24 Troubleshooting Figure 3 No display trouble isolation procedure Impedance Analyzer...
  • Page 25 Check fan operation and DC monitor LED. If the rear panel fan (blower) doesn’t run, a failure in power supply is assumed. Remove the E4990A outer cover and check if the following LEDs light: • +3.3 V and +5 V DC monitor LEDs on A60 CPU module as shown Figure •...
  • Page 26 If the system fan, located on the left side of the chassis inside the E4990A, does not run, the problem seems to be in the A51 DSP board or the flat cable between the A51 DSP board and A60 CPU module.
  • Page 27 Step 4. Check the external monitor Connect an external VGA monitor to the External Monitor Output Port on the E4990A rear panel. • If something is displayed on the external monitor, the problem seems to be related to the LCD display. Also, check...

  • Page 28: Booting Process Troubleshooting

    Troubleshooting Booting Process Troubleshooting Figure 7 represents the booting process flow in the E4990A. If the E4990A stops in the booting process, troubleshoot using the following step-by-step procedure. Figure 7 Booting process flowchart Impedance Analyzer...
  • Page 29 While the Boot up screen is displayed, if you want to perform system NOT E recovery, select Keysight Recovery System as soon as the Windows Boot Manager screen is displayed. For details of the system recovery, refer to the Installation Guide.
  • Page 30 • Windows always boots up in Safe Mode. If the E4990A was turned off without proper shutdown process, Microsoft NOT E Scandisk runs while the windows boot screens are displayed. If a serious problem is found during the scan, execute the system recovery. For details on executing the system recovery, refer to the Installation Guide.
  • Page 31 The operating system automatically checks the device drivers which are NOT E necessary for use in the E4990A and are installed in the system before the E4990A is shipped from Keysight factory. If the operating system does not detect them, a message box is displayed. In this case, install the device driver.
  • Page 32 Troubleshooting Figure 10 E4990A Application view Impedance Analyzer...

  • Page 33: Troubleshooting Using Diagnostic Test

    Troubleshooting Troubleshooting Using Diagnostic Test The E4990A has diagnostic test function to diagnose the analog measurement section and internal dc power supply voltages. The diagnostic tests make it possible to isolate a faulty board assembly. The following paragraphs describe the procedure to perform the diagnostic tests.
  • Page 34 Troubleshooting Figure 11 Diagnostic Test Step 3. Select Execute All. Follow the instruction for connection, then click OK to execute the test. Impedance Analyzer...

  • Page 35: Function Specific Troubleshooting

    Troubleshooting Function Specific Troubleshooting If the E4990A exhibits a failure symptom that is related to a specific function or control such as a front panel key control, data storage, remote control interface, external trigger, external keyboard or mouse, isolate the trouble using the Function Specific Troubleshooting procedures described below.

  • Page 36: To Check The Front Panel

    Troubleshooting To Check the Front Panel Procedure Step 1. Press key. Step 2. Click Service Menu - Test Menu - Front Panel. This opens the Front Panel Test window. Step 3. Press the front panel keys. Red ticks will appear on the Front Panel Test window whenever the corresponding key on the front panel is pressed Turn the rotary knob clockwise or counterclockwise.

  • Page 37: To Check The Lcd

    If it doesn’t work, the external keyboard or the A60 CPU Module may be faulty. To Check the Mouse Procedure Step 1. Connect a mouse to the E4990A rear panel USB port. Impedance Analyzer...

  • Page 38: To Check The External Monitor Output Port

    If no trigger occurs, a failure in the A51 DSP board is suspected. To Check the GPIB Procedure Perform the E4990A Performance Test program. If the controller cannot detect the E4990A, the problem seems to be in the A60 CPU module. To Check the USB Procedure Impedance Analyzer...
  • Page 39 Troubleshooting Connect a USB cable between controller PC and USB Interface port (USBTMC) on the rear panel of the E4990A. Turn the controller PC on. If the E4990A cannot detect the controller PC, the problems seems to be in the CPU module. Keysight I/O Library should be installed on the PC.

  • Page 40: Performance Test Failure Troubleshooting

    Performance Test failure Troubleshooting This section describes the adjustment and troubleshooting procedures used when the E4990A fails the performance tests. If the performance of the instrument is critical for the test limits and seems adjustable, perform first the adjustment(s) related to the failed test.

  • Page 41: Performance Failure Troubleshooting

    Troubleshooting Performance failure Troubleshooting Table 4 shows the recommended replacement board when the performance test fails even after adjustment. Table 3 Recommended replacement board for performance test  failure Failed Adjustment item Signal Frequency Accuracy Signal Level Monitor Accuracy Signal Level Accuracy DC Bias Level Monitor Accuracy DC Bias Level Accuracy Z Measurement Accuracy...
  • Page 42 Troubleshooting Table 4 Recommended replacement board for adjustment failure VRD Mixer LO Leakage TRD Phase Track TRD MODEM DAC DC Offset Signal Level VRD ADC Linearity TRD Compression Z Measurement Correction DC-DC Converter Switching Frequency (**: most suspicious, *: suspicious) Impedance Analyzer...
  • Page 43 Troubleshooting Impedance Analyzer...

  • Page 44: Post Repair Procedure

    ImpedanceAnalyzer Troubleshooting Guide Post Repair Procedure Post Repair Procedures This chapter lists the procedures required to verify the E4990A operation after an assembly is replaced with a new one.

  • Page 45: Post Repair Procedures

    The license code for the frequency option () and generation ID (G01) must be installed in E:/license, or the error message will be displayed. The license code can be downloaded from the Keysight Software Manager (KSM) or Keysight Software Licensing (KSL). Impedance Analyzer...

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