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Troubleshooting
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Summary of Contents for Keysight E4991B
- Page 1 Keysight E4991B Impedance Analyzer Troubleshooting Guide...
- Page 3 52.227-19 (June 1987) or any equiva- procedure, practice, or condition lent agency regulation or contract that is essential for the user to clause. Use, duplication or disclosure understand. of Software is subject to Keysight Technologies’ standard commercial license terms, and non-DOD Depart-...
- Page 4 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 5 • 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. Safety Notice Supplement • This equipment complies with EN/IEC61010-1:2010. • This equipment is of MEASUREMENT CATEGORY I (CAT I). Do not use for CAT II, III, or IV.
- Page 6 The E4991B complies with INSTALLATION CATEGORY II as well as N OT E POLLUTION DEGREE 2 in IEC61010-1. The E5080A is an INDOOR USE product. The LEDs in the E4991B are Class 1 in accordance with N OT E IEC60825-1, 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 7 To avoid the danger of introducing additional hazards, do not install substitute parts or perform unauthorized modifications to the instrument. Return the instrument to a Keysight Technologies Sales and Services Office for service and repair to ensure that safety features are maintained in operational condition.
- Page 8 Should Keysight and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement will control.
- Page 9 E4991B for the first time, system recovery procedures and troubleshooting information when Windows cannot boot up. See this manual first when you use the E4991B for the first time. Troubleshooting Guide The troubleshooting guide (this manual) provides troubleshooting information when operational problems are encountered on the E4991B.
- Page 10 Chapter 1, "Troubleshooting" This chapter provides the procedure to isolate a faulty assembly in E4991B. Chapter 2, "Post Repair Procedure" This chapter lists the procedures required to verify the E4991B operation after an assembly is replaced with a new one. Impedance Analyzer...
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Page 11: Table Of Contents
Contents Troubleshooting Introduction How to exit from the E4991B 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 To Check the Touch Panel... - Page 12 Network Analyzer...
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Page 13: Troubleshooting
Keysight E4991B Impedance Analyzer Troubleshooting Guide Troubleshooting Introduction How to exit from the E4991B 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... -
Page 14: Introduction
Troubleshooting Introduction These servicing instructions are for use by qualified WA RN IN G personnel only. To 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 WA RN IN G expose dangerous voltages. -
Page 15: How To Exit From The E4991B Measurement View
If you want to return to the Measurement View, double-click the” NO T E Keysight E4991B” icon on the desktop. if you need to shut down the Keysight E4991B, press the standby NO T E switch on the front panel. -
Page 16: To Troubleshoot The Instrument
Figure 10, “E4991B application,” on page Step 2. Check the display. • If no display appears on the LCD after the Keysight E4991B is turned on, go to “No Display Troubleshooting” on page • If the Keysight E4991B stops during booting process despite something being displayed on the LCD, go to “Booting Process... - Page 17 Troubleshooting Figure 2 Primary trouble isolation flowchart Impedance Analyzer...
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Page 18: No Display Troubleshooting
Troubleshooting No Display Troubleshooting If the Keysight E4991B 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 Keysight E4991B rear panel connector and start trouble isolation. The methods of trouble isolation are described in the procedural step 1 to 6. - Page 19 Troubleshooting Figure 3 No display trouble isolation procedure Impedance Analyzer...
- Page 20 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 Keysight E4991B outer cover and check if the following LEDs light: • +3.3 V and +5 V DC monitor LEDs on A60 CPU module as...
- Page 21 Check system fan inside. If the system fan, located on the left side of the chassis inside the Keysight E4991B, 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 22 Step 4. Check the external monitor Connect an external VGA monitor to the External Monitor Output Port on the Keysight E4991B rear panel. • If something is displayed on the external monitor, the problem seems to be related to the LCD display. Also, check...
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Page 23: Booting Process Troubleshooting
Troubleshooting Booting Process Troubleshooting Figure 7 represents the booting process flow in the Keysight E4991B. If the Keysight E4991B stops in the booting process, troubleshoot using the following step-by-step procedure. Figure 7 Booting process flowchart Impedance Analyzer... - Page 24 While the Boot up screen is displayed, if you want to perform NO T E system 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 25 Troubleshooting Figure 8 Boot up Screen Step 3. Windows boot screen. The Windows boot screen is displayed as shown in Figure 9. If the Windows boot screen is displayed, it is assumed that the SSD works and the Windows operating system is starting up. Figure 9 Windows boot screens Impedance Analyzer...
- Page 26 The operating system automatically checks the device drivers NO T E which are necessary for use in the Keysight E4991B and are installed in the system before the Keysight E4991B is shipped from Keysight factory. If the operating system does not detect them, a message box is displayed.
- Page 27 A problem with the A51 DSP board or A60 CPU Module is suspected. Step 5. E4991B Application view. The E4991B application is executed in Figure 10 after the system initialization is completed without problem.
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Page 28: Troubleshooting Using Diagnostic Test
Troubleshooting Troubleshooting Using Diagnostic Test The Keysight E4991B 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 29 Troubleshooting Figure 11 Diagnostic Test Step 3. Select Execute All. Follow the instruction for connection, then click OK to execute the test. Diagnostic Test Failure Troubleshooting Impedance Analyzer...
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Page 30: Function Specific Troubleshooting
Troubleshooting Function Specific Troubleshooting If the Keysight E4991B 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 31: To Check The Front Panel
Troubleshooting Table 1 Major functions and troubleshooting procedures Handler Interface The Handler Interface port can be used to Refer to “To execute the transfer comparator decision output data diagnostic test” on page 26 and perform timing synchronization with an “To execute the diag- external handler. -
Page 32: To Check The Lcd
If the color test screen does not appear, perform Step 4. Step 3. Connect an external VGA monitor to the External Monitor Output Port on the Keysight E4991B rear panel. • If the monitor screen view is the same as the LCD display, the problem seems to be in the A80 CPU module. -
Page 33: To Check The Mouse
To Check the Mouse Procedure Step 1. Connect a mouse to the Keysight E4991B rear panel USB port. Step 2. Verify that the mouse buttons work normally. If any button does not work or the mouse pointer does not move, a failure in the mouse or the A80 CPU Module is suspected. -
Page 34: To Check The Gpib
Procedure Connect a USB cable between controller PC and USB Interface port (USBTMC) on the rear panel of the Keysight E4991B. Turn the controller PC on. If the Keysight E4991B cannot detect the controller PC, the problems seems to be in the CPU module. -
Page 35: Performance Test Failure Troubleshooting
Performance Test failure Troubleshooting This section describes the adjustment and troubleshooting procedures used when the Keysight E4991B 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 36: Adjustment Failure Troubleshooting
Troubleshooting Table 3 Recommended replacement board for performance test failure Frequency Accuracy (1E5) Level Accuracy DC Bias Accuracy Z Measurement Accuracy (**: most suspicious, *: suspicious) Adjustment failure Troubleshooting Table 4 shows the recommended replacement board when the adjustment fails. Table 4 Recommended replacement board for adjustment failure Failed Adjustment item Frequency Reference... -
Page 37: Post Repair Procedure
Post Repair Procedures The license code can be downloaded from the Keysight Software Manager (KSM) or Keysight Software Licensing (KSL). This chapter lists the procedures required to verify the Keysight E4991B operation after an assembly is replaced with a new Impedance Analyzer... -
Page 38: 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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