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Chapter 4

43

Troubleshooting

To Troubleshoot the Instrument

4. T

roub

lesho

o

ting

To Troubleshoot the Instrument

This section describes the basic procedural flow of troubleshooting when servicing the
E4981A. The primary procedural tool in this section is the flowchart. The flowchart
contains the entire troubleshooting path from a failure symptom to the isolation of faulty
assembly, and will direct you to the completion of repair in an ordinary manner through the
possible failure symptoms. Reference letters (Yes/No) on the flowcharts point to
procedural steps that briefly explain the troubleshooting method to be performed next.

Primary Trouble Isolation

The primary trouble isolation in

is to help direct you to the correct section for

troubleshooting the E4981A.

Step 1.

Turn the E4981A power on

With the E4981A plugged in and the power turned off, the front panel orange standby LED
should be on. When the front panel power switch is turned on, the orange LED should go
out and the yellow-green LED should come on. Also, the fan should start rotating. In case
of unexpected results, go to

“Power On Sequence Troubleshooting” on page 45

.

Step 2.

Check the display

•

The power on test is executed once automatically before the measurements start. If the
power on test fails, go to

“Troubleshooting Using Service Function” on page 47

.

•

If one of the following error messages

A31 EEPROM write error

,

CPU Bd

EEPROM write error

,

CPU Bd FLASH ROM write error

,

Fan failed

, or

Power

failed

is displayed during the measurement process, go to

“Power On Sequence

Troubleshooting” on page 45

(check booting process).

Step 3.

Check the basic function

If the front-panel, LCD display, data storage, remote interface or another function (except
for measurement part) does not work correctly, go to

“Function Specific Troubleshooting”

.

Step 4.

Check the measurement function

If the E4981A fails any of the performance tests, go to

“Performance test failure

troubleshooting” on page 67

A faulty part should be replaced as outlined in Chapter 5 which gives replacement
procedures for each part. The procedures required after part replacement are given in
Chapter 6.

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Summary of Contents for E4981A

Page 1: ...Keysight E4981A 120 Hz 1 kHz 1 MHz Capacitance Meter Service Guide ...

Page 2: ......

Page 3: ...r Service Guide First Edition FIRMWARE REVISIONS This manual applies directly to instruments that have the firmware revision A 01 00 or higher For additional information about firmware revisions see Appendix A Keysight Part No E4981 90100 March 2009 ...

Page 4: ...of Keysight Technologies Microsoft MS DOS Windows Visual C Visual Basic VBA and Excel are registered UNIX is a registered trademark in U S and other countries licensed exclusively through X Open Company Limited Portions Copyright 1996 Microsoft Corporation All rights reserved Copyright 2009 2014 Keysight Technologies Manual Printing History The manual s printing date and part number indicate its c...

Page 5: ...ements are to be confirmed by the builder of the system Ground the Instrument To avoid electric shock the instrument chassis and cabinet must be grounded with the supplied power cable s grounding prong DO NOT Operate in an Explosive Atmosphere Do not operate the instrument in the presence of inflammable gasses or fumes Operation of any electrical instrument in such an environment clearly constitut...

Page 6: ...to refer to the instrument manual Alternating current Direct current On Supply Off Supply In position of push button switch Out position of push button switch Frame or chassis terminal A connection to the frame chassis of the equipment which normally include all exposed metal structure Stand by WARNING This warning sign denotes a hazard It calls attention to a procedure practice condition or the l...

Page 7: ...o the implied warranties of merchantability and fitness for a particular purpose Keysight shall not be liable for errors or for incidental or consequential damages in connection with the furnishing use or performance of this document or any information contained herein Should Keysight and the user have a separate written agreement with warranty terms covering the material in this document that con...

Page 8: ...y key on the front panel or external keyboard labeled Sample key may be omitted Sample menu button box Indicates a menu button box on the screen labeled Sample which can be selected executed by clicking menu button or box may be omitted Sample 1 Sample 2 Sample 3 Indicates a sequential operation of Sample 1 Sample 2 and Sample 3 menu button or box may be omitted ...

Page 9: ...7 VRD Gain Adjustment 38 TRD Rr Adjustment 39 Impedance Adjustment 39 Cable Error Range Dependency Correction 39 4 Troubleshooting Introduction 42 To Troubleshoot the Instrument 43 Primary Trouble Isolation 43 Power On Sequence Troubleshooting 45 Check the Line Voltage and Fuse 45 Check the Power Supply Unit Output 45 Check booting process 46 Troubleshooting Using Service Function 47 Power On Test...

Page 10: ... 76 Fan Assembly 77 Front View 78 Rear View 79 Chassis Assembly 80 3 4 Rack Module Assembly 81 Front Panel 82 Front Panel and Inverter Assembly 85 Label Assembly 86 Bumpers Handle Assembly 87 Other Parts 88 6 Replacement Procedure Replacing an Assembly 90 Tightening Torque of Screws 90 Required Tools 91 3 4 Rack Module Top Replacement 92 Tools Required 92 Removal Procedure 92 Replacement Procedure...

Page 11: ...oval 110 Tools Required 110 Removal Procedure 110 Replacement Procedure 110 Plate Assembly Replacement 111 Tools Required 111 Removal Procedure 111 Replacement Procedure 111 Fan Assembly Replacement 112 Tools Required 112 Removal Procedure 112 Replacement Procedure 112 GPIB Assembly Replacement 114 Tools Required 114 Removal Procedure 114 Replacement Procedure 114 Power Inlet Assembly Replacement ...

Page 12: ...e 125 7 Post Repair Procedures Post Repair Procedures 128 A Manual Changes Manual Changes 132 B Firmware Update Update the E4981A firmware using USB GPIB interface 134 Required Equipment 134 How to update E4981A firmware using USB GPIB interface 134 Update the E4981A firmware using USB cable 135 Required Equipment 135 How to update E4981A firmware using USB cable 135 C Power Requirement Replacing ...

Page 13: ...Contents 11 L 145 M 145 N 145 O 146 P 146 Q 146 R 147 S 147 T 147 U 148 Warning Message 149 ...

Page 14: ...12 Contents ...

Page 15: ... 4 Chapter Title 5 Chapter Title 1 General Information This Service Guide is a guide to servicing the E4981A 20 Hz 1 kHz 1 MHz Capacitance Meter The Service Guide provides information about performance test adjustment troubleshooting and repairing the E4981A ...

Page 16: ...e to isolate a faulty assembly in the E4981A Chapter 5 Replaceable Parts This chapter contains information for ordering replacement parts for the E4981A Chapter 6 Replacement Procedure This chapter provides procedure for removing and replacing the major assemblies in the E4981A Chapter 7 Post Repair Procedures This chapter lists the procedures required to verify the E4981A operation after an assem...

Page 17: ...ve a different manual part number This sheet contains change information that explains how to adapt the manual to the newer instrument In addition to change information the supplement may contain information for correcting errors Errata in the manual To keep this manual as current and accurate as possible Keysight Technologies recommends that you periodically request the latest Manual Changes supp...

Page 18: ... 16380C with option 001 1 P A Four Terminal Pair Standard Resistor Set No Substitute Keysight 42030A 1 A T 4TP Open Termination No Substitute Keysight 42090A 1 P A 4TP Short Termination No Substitute Keysight 42091A 1 A Test Leads BNC 1 m No Substitute Keysight 16048A 1 P A Test Leads BNC 2 m No Substitute Keysight 16048D 1 P A DC Power Supply 5V 0 1A Keysight E3610A 1 T Handler Simulator No Subst...

Page 19: ...17 1 Chapter Title 3 Chapter Title 4 Chapter Title 5 Chapter Title 2 Performance Test 2 Performance Test This chapter provides the outline of the E4981A performance tests ...

Page 20: ...ts should be performed periodically The recommended test interval is 12 months The test interval depends on maintenance and the environmental conditions under which the instrument is used You may find that the interval could be shortened or lengthened however such a decision should be based on substantial quantitative data Test Equipment Required The required equipment for the performance test is ...

Page 21: ...h 2 m Frequency Hz Spec 120 to 1M 1 0 02 1 Option 001 only Frequency Counter Keysight 53131A or Keysight 53181A Interface Box Keysight 04284 65007 Test Leads BNC 2m Keysight 16048D BNC f BNC f Adapter Keysight 1250 1830 4ea BNC m BNC m Cable 122cm Keysight 8120 1840 Frequency Frequency Shift Test Limit Measurement Uncertainty TAR 120 Hz 0 0 024 Hz 0 00093 Hz 25 88 1 kHz 0 0 20 Hz 0 00784 Hz 25 51 ...

Page 22: ...y of the E4981A source port output signal Specification 23 5 C Test equipment Signal Level V Spec 0 1 to 1 0 5 0 Digital Multimeter Keysight 3458A Interface Box Keysight 04284 65007 Test Leads BNC 2m Keysight 16048D BNC f BNC f Adapter Keysight 1250 1830 4ea BNC m BNC m Cable 122cm Keysight 8120 1840 Dual Banana BNC f Adapter Keysight 1251 2277 ...

Page 23: ...0 3 V 15 0 mV 0 41 mV 36 83 0 4 V 20 0 mV 0 38 mV 53 25 0 5 V 25 0 mV 0 23 mV 108 73 0 6 V 30 0 mV 0 40 mV 76 52 0 7 V 35 0 mV 0 40 mV 87 67 0 8 V 40 0 mV 0 45 mV 89 41 0 9 V 45 0 mV 0 24 mV 191 54 1 0 V 50 0 mV 0 26 mV 197 42 0 1 V 1 uF 5 0 mV 0 24 mV 21 52 0 2 V 10 0 mV 0 45mV 22 46 0 3 V 15 0 mV 0 34 mV 44 91 0 4 V 20 0 mV 0 31 mV 65 84 0 5 V 25 0 mV 0 44 mV 57 42 0 6 V 30 0 mV 0 33 mV 92 39 0 ...

Page 24: ... 150 70 0 8 V 40 0 mV 0 18 mV 232 77 0 9 V 45 0 mV 0 43 mV 105 66 1 0 V 50 0 mV 0 32 mV 156 65 0 1 V 100 nF 5 0 mV 0 30 mV 16 98 0 2 V 10 0 mV 0 19 mV 54 83 0 3 V 15 0 mV 0 34 mV 44 43 0 4 V 20 0 mV 0 28 mV 72 90 0 5 V 25 0 mV 0 27 mV 93 82 0 6 V 30 0 mV 0 41 mV 73 12 0 7 V 35 0 mV 0 31 mV 115 57 0 8 V 40 0 mV 0 39 mV 102 94 0 9 V 45 0 mV 0 26 mV 172 45 1 0 V 50 0 mV 0 31 mV 165 38 Frequency Frequ...

Page 25: ...V 30 0 mV 6 95 mV 4 31 0 7 V 35 0 mV 8 11 mV 4 31 0 8 V 40 0 mV 9 27 mV 4 31 0 9 V 45 0 mV 10 42 mV 4 32 1 0 V 50 0 mV 11 58 mV 4 32 1 0 1 V 5 0 mV 1 19 mV 4 22 0 2 V 10 0 mV 2 32 mV 4 31 0 3 V 15 0 mV 3 48 mV 4 31 0 4 V 20 0 mV 4 64 mV 4 31 0 5 V 25 0 mV 5 80 mV 4 31 0 6 V 30 0 mV 6 95 mV 4 32 0 7 V 35 0 mV 8 10 mV 4 32 0 8 V 40 0 mV 9 26 mV 4 32 0 9 V 45 0 mV 10 42 mV 4 32 1 0 V 50 0 mV 11 57 mV...

Page 26: ...mV 8 11 mV 4 31 0 8 V 40 0 mV 9 31 mV 4 29 0 9 V 45 0 mV 10 43 mV 4 31 1 0 V 50 0 mV 11 62 mV 4 30 1 0 1 V 5 0 mV 1 19 mV 4 22 0 2 V 10 0 mV 2 33 mV 4 30 0 3 V 15 0 mV 3 48 mV 4 31 0 4 V 20 0 mV 4 65 mV 4 30 0 5 V 25 0 mV 5 79 mV 4 32 0 6 V 30 0 mV 6 95 mV 4 32 0 7 V 35 0 mV 8 11 mV 4 31 0 8 V 40 0 mV 9 26 mV 4 32 0 9 V 45 0 mV 10 42 mV 4 32 1 0 V 50 0 mV 11 58 mV 4 31 Frequency Frequency Shift Le...

Page 27: ...V 1 16 mV 4 31 0 2 V 10 0 mV 2 32 mV 4 31 0 3 V 15 0 mV 3 48 mV 4 31 0 4 V 20 0 mV 4 64 mV 4 31 0 5 V 25 0 mV 5 79 mV 4 31 0 6 V 30 0 mV 6 95 mV 4 32 0 7 V 35 0 mV 8 11 mV 4 31 0 8 V 40 0 mV 9 27 mV 4 31 0 9 V 45 0 mV 10 43 mV 4 31 1 0 V 50 0 mV 11 59 mV 4 31 1 Option 001 only Frequency Frequency Shift Level Range Test Limit Measurement Uncertainty TAR ...

Page 28: ...tive Accuracy Cal Accuracy 1 Refer to the Specification Chapter in the User s Guide for details Standard Capacitors Set Keysight 16380A Standard Capacitors Set Keysight 16380C with option 001 Four Terminal Pair Standard Resistor Set Keysight 42030A 4TP Open Termination Keysight 42090A 4TP Short Termination Keysight 42091A Test Leads BNC 1 m Keysight 16048A Test Leads BNC 2 m Keysight 16048D BNC f ...

Page 29: ...5 pF 5 44 pF 15 63 0 D 0 00065 0 000032 20 83 Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 100 nF 1 V 120 Hz 0 Cp 70 pF 7 68 pF 9 12 0 D 0 0005 0 000035 14 44 1 kHz 0 Cp 70 pF 4 37 pF 16 02 0 D 0 0005 0 000023 22 45 0 1 V 1 kHz 0 Cp 205 pF 12 36 pF 16 59 0 D 0 0019 0 000023 83 04 Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TA...

Page 30: ...req Freq Shift Param Test Limit Measurement Uncertainty TAR 100 pF 1 V 1 kHz 0 Cp 85 fF 8 65 fF 9 82 0 D 0 00065 0 000062 10 61 1 MHz 1 2 Cp 70 fF 10 63 fF 6 58 2 D 0 0005 0 000065 7 71 1 Cp 70 fF 11 11 fF 6 30 1 D 0 0005 0 000065 7 71 0 Cp 70 fF 11 15 fF 6 28 0 D 0 0005 0 000065 7 71 1 Cp 70 fF 10 90 fF 6 42 1 D 0 0005 0 000065 7 71 2 Cp 70 fF 10 92 fF 6 41 2 D 0 0005 0 000065 f 7 71 1 Option 001...

Page 31: ...6 42 1 D 0 00068 0 000065 10 49 0 Cp 88 fF 13 64 fF 6 45 0 D 0 00068 0 000065 10 49 1 Cp 88 fF 17 76 fF 4 95 1 D 0 00068 0 000065 10 49 2 Cp 88 fF 15 33 fF 5 74 2 D 0 00068 0 000065 10 49 1 Option 001 only Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 100 pF 1 V 1 MHz 1 2 Cp 126 fF 18 70 fF 6 71 2 D 0 0011 0 000065 16 28 1 Cp 126 fF 19 47 fF 6 44 1 D 0 0011 0 0...

Page 32: ...000021 24 83 Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 10 pF 1 V 1 MHz 1 2 Cp 7 fF 1 11 fF 6 34 2 D 0 0005 0 000065 7 73 1 Cp 7 fF 1 14 fF 6 15 1 D 0 0005 0 000065 7 73 0 Cp 7 fF 0 98 fF 7 16 0 D 0 0005 0 000065 7 73 1 Cp 7 fF 0 75 fF 9 34 1 D 0 0005 0 000065 7 73 2 Cp 7 fF 0 84 fF 8 40 2 D 0 0005 0 000065 7 73 1 Option 001 only Standard Signal Level Freq F...

Page 33: ... 7 45 1 Cp 0 7 pF 128 11 fF 5 46 1 D 0 0005 0 000068 7 45 0 Cp 0 7 pF 142 70 fF 4 90 0 D 0 0005 0 000068 7 45 1 Cp 0 7 pF 161 84 fF 4 32 1 D 0 0005 0 000068 7 45 2 Cp 0 7 pF 146 28 fF 4 78 2 D 0 0005 0 000068 7 45 1 Option 001 only Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 1 pF 1 V 1 MHz 1 2 Cp 0 85 fF 0 19 fF 4 53 2 D 0 00065 0 000072 9 14 1 Cp 0 85 fF 0 1...

Page 34: ... 0 D 0 00065 0 000042 15 79 Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 1 uF 1 V 120 Hz 0 Cp 0 7 nF 69 30 pF 10 10 0 D 0 0005 0 000023 22 55 1 kHz 0 Cp 0 7 nF 44 52 pF 15 72 0 D 0 0005 0 000032 16 02 Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 1 uF 0 1 V 120 Hz 0 Cp 2 05 nF 73 32 pF 27 21 0 D 0 0019 0 000042 44 94 Standa...

Page 35: ...Measurement Uncertainty TAR 1 uF 1 V 120 Hz 0 Cp 1 26 nF 81 21 pF 15 45 0 D 0 0011 0 000042 25 62 Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 100 pF 1 V 1 MHz 1 2 Cp 70 fF 10 35 fF 6 76 2 D 0 0005 0 000065 7 71 1 Cp 70 fF 10 80 fF 6 48 1 D 0 0005 0 000065 7 71 0 Cp 70 fF 10 73 fF 6 52 0 D 0 0005 0 000065 7 71 1 Cp 70 fF 11 17 fF 6 26 1 D 0 0005 0 000065 7 71 ...

Page 36: ...0 fF 10 20 fF 6 86 1 D 0 0005 0 000065 7 71 0 Cp 70 fF 10 83 fF 6 46 0 D 0 0005 0 000065 7 71 1 Cp 70 fF 10 50 fF 6 66 1 D 0 0005 0 000065 7 71 2 Cp 70 fF 10 31 fF 6 79 2 D 0 0005 0 000065 7 71 1 Option 001 only Standard Signal Level Freq Freq Shift Param Test Limit Measurement Uncertainty TAR 1 Ω 1 V 120 Hz 0 Rs 4 3 mΩ 0 15 mΩ 29 48 Standard Signal Level Freq Freq Shift Param Test Limit Measureme...

Page 37: ...This chapter provides the adjustment information for the E4981A to ensure that it is within its specifications The adjustment must be performed Keysight s qualified service personnel If you need the adjustment for your E4981A it should be sent to the nearest Keysight Technologies service office ...

Page 38: ...side or outside the equipment or disconnection of the protective ground terminal can make the instrument dangerous Intentional interruption of the protective ground system for any reason is prohibited Warm up for Adjustment Warm up the E4981A for at least 30 minute before performing any of the following Adjustment procedures to ensure proper results and correct instrument operation Required Equipm...

Page 39: ...81A Required equipment for the writing ID None Test Signal Level Monitor Adjustment This adjustment calibrate the Signal Level Monitor s absolute measurement accuracy Required equipment for the Signal Level Monitor Adjustment Test Signal Level Adjustment This adjustment calibrate the Signal Level absolute measurement accuracy Required equipment for the Test Signal Level adjustment Description Reco...

Page 40: ...eplacing Assembly VRD Gain Adjustment The adjustment calibrate the amplifiers gain and phase shift Required equipment for the VRD Gain adjustment Description Recommended Model 4TP Open Termination Keysight 42090A 1 kΩ Standard Resistor Keysight 42037A ...

Page 41: ...ble length error on 10 kΩ 100 kΩ 1 kHz and 100 Ω 10 kΩ 100 kΩ 1 MHz Required equipment for the Cable Error Range Dependency Correction Description Recommended Model 4TP Open Termination Keysight 42090A Standard Resistor Set Keysight 42030A Description Recommended Model Standard Capacitors Set Keysight 16380A Standard Capacitors Set Keysight 16380C with option 001 Test Leads BNC 1m Keysight 16048A ...

Page 42: ...40 Chapter3 Adjustment Required Adjustment after Replacing Assembly BNC f BNC f Adapter Keysight 1250 1830 4ea Description Recommended Model ...

Page 43: ...41 4 Troubleshooting 4 Troubleshooting This chapter provides the procedure to isolate a faulty assembly in the E4981A ...

Page 44: ...ening of covers or removal of parts is likely to expose dangerous voltages Disconnect the instrument from its power supply beforehand CAUTION Many of the assemblies in the instrument are very susceptible to damage from ESD electrostatic discharge Perform the following procedures only at a static safe workstation and wear a grounding strap CAUTION DO NOT operate without following instructions Progr...

Page 45: ... LED should go out and the yellow green LED should come on Also the fan should start rotating In case of unexpected results go to Power On Sequence Troubleshooting on page 45 Step 2 Check the display The power on test is executed once automatically before the measurements start If the power on test fails go to Troubleshooting Using Service Function on page 47 If one of the following error messages...

Page 46: ...ck the LCD Yes No Yes No Yes Power on Power on test Go to Troubleshooting Using Service Function Power on test pass Yes No End Performance test Go to Performance Test Failure Troubleshooting Performance test pass Yes No No In case of display scan brightness and color problems Display and Boot up Problems Problems on Measurement Performance and Measurement Result Problems on Front Panel LCD Display...

Page 47: ... For more information about the line cord and power fuse see the Power Requirements in Appendix B Check the Power Supply Unit Output Step 1 Remove the E4981A s outer cover Step 2 Turn the E4981A power on Step 3 Check the output voltage 3 3 V and 5 V of the power supply unit LED on A31 board are turn on with green if the power unit is worked correctly The location of LED on the A31 board is shown i...

Page 48: ... LED doesn t blink check the display interface board the A31 board and the relevant cable 6 The firmware revision and hardware option information along with copyright declaration should be displayed If nothing is displayed check the LCD display interface board inverter board and the relevant cables 7 The power on test should be executed once automatically before the measurement starts If the power...

Page 49: ...On Test contains tests as shown in Table 4 3 If the power on test is failed an error code or an error message is also displayed You can identify a failure section with the error code or the error message The error code or error message is related to each test group as shown in Table 4 3 For example the first item of the error code is for CPU test group second item is for System test group and sixt...

Page 50: ...ption SYSTEM Checks the entire system A1 A2 A3 boards system calibration data and so on USER DATA Checks the GPIB LAN configurations instrument configuration information instrument calibration data and scanner calibration data BATTERY Checks the internal batteries KEY Checks the font panel keys Visual checks only no result shown on screen DISPLAY Checks the LCD Visual checks only no result shown o...

Page 51: ...d DECR softkeys Step 7 Press EXECUTE TEST START 2 in Figure 4 4 to execute the selected test item Figure 4 4 Self test screen and procedure SERVICE Page The results of the power on test or the self test SYSTEM USER DATA and BATTERY can be saved into a USB memory Pressing the System key followed by the SERVICE softkey opens the SERVICE page This page is read only This page displays the system infor...

Page 52: ...not be edited on the SERVICE page Saving the System Information into External Memory The system information of E4981A can be saved into external memory The system information may be used for the purposes of support and repair by Keysight Technologies 㪼㪋㪐㪏㪈㪸㫊㪼㪈㪇㪇㪏 Table 4 2 Monitor Information Description POWER ON Displays how many times E4981A have been started up and its cumulative power on time ...

Page 53: ...s the SAVE SYS INFO softkey Step 6 While the data is being saved a PROCESSING message is shown on the display When the data has been saved into the USB memory a Storing data completed message appears in the system message area Example of the System Information The sysinfo txt can be read by using an external computer PC The example of the system information is as follows Example 4 1 System informa...

Page 54: ...2 509765625E 00 A1 6 5 138140202E 00 A4 1 3 594675164E 02 A4 2 9 541090152E 01 A4 3 9 995238615E 01 A4 4 1 075078767E 00 A4 5 9 505389726E 01 A4 6 1 075030646E 00 A4 7 2 398871813E 01 USER 1 0 USER 2 0 USER 3 0 USER 4 0BATT 1 3 188476563E 00 4 150000000E 01 2 927168354E 01 ...

Page 55: ...tion Test group Test No Test Name Error Code Message Probable faulty board assembly A31 A34 PPMC CPU 1 CPU Test 1 ffff 2 CPU Test 1 ff System 1 A1 FPGA check 0x01 2 A4 FPGA check 0x02 3 A1 Revision check 0x04 4 A4 Revision check 0x08 Data 1 System Data 0x01 2 SysCal Data 0x02 3 Flash File system check 0x04 4 Test Limit Data 0x08 Option 1 Option consistency check 0x01 A31 1 A31_DCBUS_M12V 0x01 2 A3...

Page 56: ...User 1 User Data User Data Lost 2 State Data State Data Lost 3 Correction Data Corr Data Lost 4 Scanner Correction Data Scanner Data Lost Battery 1 A1_DCBUS_BATTERY Battery Low Table 4 3 Power on test self test failure troubleshooting information Test group Test No Test Name Error Code Message Probable faulty board assembly A31 A34 PPMC ...

Page 57: ... USB port is used to save data in a USB memory Refer to To Check the Front USB port on page 56 External trigger input The external trigger input terminal BNC on the rear panel allows an external trigger source to be used for measurement trigger Refer to To Check the External Trigger Input on page 57 LAN port The LAN interface port on the rear panel allows the E4981A to be connected to 10 100 Base ...

Page 58: ... the panel To Check the LCD Procedure Step 1 Press System SELF TEST Step 2 Use the cursor key to highlight the selection item to the right of TEST No Step 3 Select 5 DISPLAY using the INCR or DECR softkey Step 4 Press EXECUTE TEST START The whole of the LCD screen turns Red Green Blue Black and White every 2 seconds Step 5 To exit the DISPLAY test press TEST STOP and then press Return If the LCD d...

Page 59: ...in the USB port or A31 board is suspected Also check the cable between the USB port and A31 board To Check the External Trigger Input Procedure Step 1 Press Preset CLEAR SETTING OK to initialize the E4981A Step 2 Press Meas Setup Step 3 Using the cursor keys select the TRIG field and then select EXTsoftkey Step 4 Press Display Format Step 5 Connect a BNC Short or 50 Ω termination to the Ext Trig c...

Page 60: ...le click Network The Network dialog box will appear In the Configuration tab select TCP IP display it in revers video and press the Properties button c The dialog box appears If Specify an IP address has been selected record the IP address and subnet mask d If the Obtain an IP address automatically has been selected select the Specify an IP address Enter the IP address xxx xxx xxx y and subnet mas...

Page 61: ...E4981A Figure 4 7 shows an example of normal result that indicates the IP address packet size and a response time counted by the computer The ping command is repeated 4 times Figure 4 7 Example of normal ping command test result If the E4981A doesn t return the response the external computer displays a message of Request timed out as shown in Figure 4 8 In this case a failure in the PPMC PCA is su...

Page 62: ...charge Step 2 Remove the PSU Deck Assembly according to the procedure for describing in PSU Deck Assembly Removale on page 95 NOTE The Interface Board contains electronic components that can be damaged by static electricity through electrostatic discharge ESD To prevent ESD damage maintain frequent contact with any bare sheet metal surface on the chassis A grounding wrist strap or similar device i...

Page 63: ...leshooting Figure 4 9 Jumper and Switch Settings e4981ase1046 㪦㪝㪝㪡㪧㪈㪡㪊㪡㪈㪡㪉㪦㪥㪪㪉㪦㪝㪝㪪㪈㪦㪥㪦㪥㪦㪝㪝㪡㪧㪉㪪㪊 Table 4 6 Internal jumper settings Jumper number Jumper position 1 1 The factory default setting is position N shown in the table above JP1 1 N 2 3 4 JP2 1 N 2 3 4 ...

Page 64: ... panel to the handler simulator as shown in Figure 4 10 Figure 4 10 Handler Interface Function Test Setup Step 7 Press System Table 4 7 Bit switch S1 settings Bit number 1 1 The bit numbers referenced in this table are the numbers printed on the bit switch S1 of the interface board Factory default settings 1 Off 2 Off 3 Off 4 On 5 Off 6 Off 7 N A 8 N A e4981ase1044 Handler Simulator E4981A ...

Page 65: ...signals displayed on the LCD The LEDs turns ON light in the sequence shown in Figure 4 11 Figure 4 11 Handler Interface Function Check Step 13 Press the TEST STOP softkey NOTE Do not execute any SELF TEST except for the Handler Interface Test or the E4981A will become inoperative Step 14 Return the jumper and switch settings on the interface board to their original settings Softkey Function INCR I...

Page 66: ...electricity through electrostatic discharge ESD To prevent ESD damage maintain frequent contact with any bare sheet metal surface on the chassis A grounding wrist strap or similar device is useful for this purpose Handle the board carefully at all times Avoid touching electronic components or circuit paths NOTE Before performing Step 3 note the switch settings on the Interface Board in order to re...

Page 67: ...interface connector on the E4981A s rear panel shown in Figure 4 12 Step 7 Connect the 1 kΩ standard to the UNKNOWN terminal on the E4981A s front panel Step 8 Turn the E4981A ON Step 9 Press System Step 10 Press the SELF TEST softkey to display the SELF TEST page Step 11 Use the CURSOR arrow keys to move the cursor to the TEST MENU field 3 On 4 Off Table 4 10 Setting Bit Switch S3 Bit Default e49...

Page 68: ...he scanner simulator board turn ON in accordance with the E4981A settings displayed in the LCD Step 15 Press the TEST STOP softkey NOTE Do not execute any SELF TEST except for the Scanner Interface Test or the E4981A will become inoperative Step 16 Return the switch settings on the Interface Board to their original settings Softkey Function INCR Increments the test number of the Test Menu DECR Dec...

Page 69: ...dance with the Performance tests failure troubleshooting procedure Performance test failure troubleshooting Table 4 11 represents the relationships between the failed test and probable faulty assembly If the performance test failure cannot be removed by a proper adjustment replace the assembly shown in this table Note that this table lists some typical cases There are possibilities that another as...

Page 70: ...68 Chapter4 Troubleshooting Performance test failure troubleshooting ...

Page 71: ...69 2 Chapter Title 3 Chapter Title 4 Chapter Title 5 Chapter Title 5 Replaceable Parts 5 Replaceable Parts This chapter contains information for ordering replacement parts for the E4981A ...

Page 72: ...a minimum amount for parts ordered through a local Keysight Technologies Sales Office when the orders require billing and invoicing Prepaid transportation There is a small handling charge for each order No invoices In order for Keysight Technologies to provide these advantages please send a check or money order with each order Mail order forms and specific ordering information are available throug...

Page 73: ... Chapter Title 5 Replaceable Parts Replaceable Parts List Top View A34 Analog Board Assembly Figure 5 1 Top View A34 Analog Board Assembly Table 5 1 Top View A34 Analog Board Assembly Ref Desig Keysight Part Number Qty Description 1 See Table 5 6 1 PSU ASSEMBLY 2 E4980 66534 1 PCA EXM C A34 ANALOG BOARD ...

Page 74: ...blies Figure 5 2 Top View Major Assemblies Table 5 2 Top View Major Assemblies Ref Desig Keysight Part Number Qty Description 1 E4980 66537 1 PCA EXM C INTERFACE BOARD 2 E4980 62004 1 P1001 INSTALLED OS 3 E4980 66531 1 PCA EXM A31 DIGITAL BOARD 4 See Table 5 7 1 FAN ASSEMBLY ...

Page 75: ... View Cables and Miscellaneous Parts Table 5 3 Top View Cables and Miscellaneous Parts Ref Desig Keysight Part Number Qty Description 1 E4980 61626 1 BULKHEAD USB CABLE 2 1400 3337 1 CLAMP CABLE 0 25 IN CABLE DIA 3 0515 2143 8 SCREW MACH M4 0 x L6 PAN T20 4 0515 0430 3 SCREW MACH M3 0 x L6 PAN T10 5 E4980 61624 1 CABLE ASSY GPIB 6 E4980 61621 1 FLAT CABLE ASSY 7 E4980 61620 1 CABLE ASSY LVDS ...

Page 76: ...Chassis Assembly PPMC PCA Figure 5 4 Rear Chassis Assembly PPMC PCA Table 5 4 Rear Chassis Assembly PPMC PCA Ref Desig Keysight Part Number Qty Description 1 E4980 62004 1 P1001 INSTALLED OS 2 0515 1940 4 SCREW MACH M2 5 x L6 PAN T8 3 E4980 07004 1 USB GASKET ...

Page 77: ... Digital Board Figure 5 5 Rear Chassis Assembly A31 Digital Board Table 5 5 Rear Chassis Assembly A31 Digital Board Ref Desig Keysight Part Number Qty Description 1 E4980 66531 1 PCA EXM A31 DIGITAL BOARD 2 0515 0430 6 SCREW MACH M3 0 x L6 PAN T10 3 0515 4830 1 SCREW MACH M4 0 x L5 PAN T20 4 2950 0054 1 NUT 1 2 28 THD 3050 2230 1 WASHER SPR WAVY 13 MM ID 17 MM OD ...

Page 78: ...ure 5 6 Power Supply Unit Assembly Table 5 6 Power Supply Unit Assembly Ref Desig Keysight Part Number Qty Description 1 E4980 00104 1 DECK 2 E4980 61622 1 CABLE ASSY POWER 3 0950 4918 1 POWER SUPPLY 125 WATT 4 OUTPUT E4980 04002 1 PSU COVER 4 0515 0430 1 SCREW MACH M3 0 x L6 PAN T10 ...

Page 79: ...le 3 Chapter Title 4 Chapter Title 5 Chapter Title 5 Replaceable Parts Fan Assembly Figure 5 7 Fan Assembly Table 5 7 Fan Assembly Ref Desig Keysight Part Number Qty Description 1 0515 2143 1 SCREW MACH M4 0 x L6 PAN T20 2 1400 0249 2 CABLE TIE 3 E4980 61613 1 FAN ASSY ...

Page 80: ...arts Replaceable Parts List Front View Figure 5 8 Front View Table 5 8 Front View Ref Desig Keysight Part Number Qty Description 1 1401 0048 5 CAP BOTTLE 2950 0054 5 NUT 1 2 28 THD 3050 2230 5 WASHER SPR WAVY 13 MM ID 17 MM OD ...

Page 81: ...r View Ref Desig Keysight Part Number Qty Description 1 E4980 00209 1 PANEL I F C 2 0515 0430 6 SCREW MACH M3 0 x L6 PAN T10 3 0380 4870 2 STANDOFF HEX 591 INCH LG 4 40 THD 4 E4980 61623 1 INLET ASSY 5 E4980 00102 1 CHASSIS DIGITAL 6 1401 0048 1 CAP BOTTLE 7 0515 1946 2 SCREW MACH M3 0 x L6 FT T10 8 2110 1017 1 FUSE 3 0A 250V 9 0361 1890 4 RIVET PUSH IN 8 MM HEAD DIA 4 MM BODY DIA ...

Page 82: ...able Parts List Chassis Assembly Figure 5 10 Chassis Assembly Table 5 10 Chassis Assembly Ref Desig Keysight Part Number Qty Description 1 E4980 00103 1 CHASSIS ANALOG 2 E4980 00102 1 CHASSIS DIGITAL 3 1400 2143 2 CLAMP HOSE 1 DIA NYL 6 6 ...

Page 83: ...er Title 5 Replaceable Parts 3 4 Rack Module Assembly Figure 5 11 3 4 Rack Module Assembly Table 5 11 3 4 Rack Module Assembly Ref Desig Keysight Part Number Qty Description 1 5041 7719 1 3 4 RACK MODULE TOP 2 E4980 40003 1 3 4 RACK MODULE BOTTOM 3 0515 2143 2 SCREW MACH M4 0 x L6 PAN T20 4 E4980 01208 1 PLATE ...

Page 84: ...82 Chapter5 Replaceable Parts Replaceable Parts List Front Panel Figure 5 12 Front Panel ...

Page 85: ... 25001 1 INSULATOR 0950 4111 1 INVERTER 0515 0658 2 SCREW MACH M2 0 x L6 PAN T6 2 N1912 60002 1 DISPLAY INTERFACE 3 N1912 40002 1 DISPLAY SUPPORT 4 2090 0825 1 DISPLAY E4980 25003 2 LCD GASKET SHORT E4980 25004 2 LCD GASKET LONG N1912 20005 1 WINDOW EMI SHIELD 5 0515 0661 4 SCREW MACH M2 0 x L14 PAN T6 6 E4980 07006 1 EMI SHIELD FRONT N1912 20001 1 KEY FLEX CIRCUIT 7 E4980 40004 1 KEYPAD 8 E4980 4...

Page 86: ...PPORT 4 2090 0825 1 DISPLAY E4980 25003 2 LCD GASKET SHORT E4980 25004 2 LCD GASKET LONG N1912 20005 1 WINDOW EMI SHIELD 5 0515 0661 4 SCREW MACH M2 0 x L14 PAN T6 6 E4980 07006 1 EMI SHIELD FRONT N1912 20001 1 KEY FLEX CIRCUIT 7 E4980 40004 1 KEYPAD 8 E4980 40005 1 FRONT PANEL 9 N1912 61002 1 CABLE ASSY BACKLIGHT 10 1510 0130 1 BINDING POST SGL 3050 2229 1 WASHER SPR WAVY 6 4 MM ID 2950 0006 1 NU...

Page 87: ...bly Ref Desig Keysight Part Number Qty Description 1 E4980 61620 1 CABLE ASSY LVDS 2 N1912 61002 1 CABLE ASSY BACKLIGHT 3 0950 4111 1 INVERTER E4980 25001 1 INSULATOR 4 0515 0658 1 SCREW MACH M2 0 x L6 PAN T6 5 N1912 20001 1 KEY FLEX CIRCUIT 6 0515 0374 2 SCREW MACH M3 0 x L10 PAN T10 7 2950 0006 1 NUT HEX DBL CHAM 1 4 32 THD 3050 2229 1 WASHER SPR WAVY 6 4 MM ID 1510 0130 1 BINDING POST SGL 8 E49...

Page 88: ...e 5 14 Label Assembly Table 5 15 Label Assembly Ref Desig Keysight Part Number Qty Description 1 E4980 87005 1 GND LABEL 2 9320 6627 1 BNC LABEL 3 E4980 87007 1 NAME LABEL Option 001 E4980 87011 1 NAME LABEL Option 002 4 E4980 87008 1 TERMINAL LABEL 5 E4980 87009 1 GND LABEL ...

Page 89: ... Title 4 Chapter Title 5 Chapter Title 5 Replaceable Parts Bumpers Handle Assembly Figure 5 15 Bumpers Handle Assembly Table 5 16 Bumpers Handle Assembly Ref Desig Keysight Part Number Qty Description 1 E4980 45001 1 HANDLE 2 34480 46001 1 FRONT BUMPER 3 34480 46002 1 REAR BUMPER ...

Page 90: ...Other Parts Keysight Part Number Qty Description E4981 901x0 1 1 SERVICE GUIDE 82357 61601 1 USB CABLE 1 The number indicated by x in the part number of the manual 0 for the first edition is incremented by 1 each time a revision is made The latest edition comes with the product ...

Page 91: ...89 6 Replacement Procedure 6 Replacement Procedure This chapter provides procedure for removing and replacing the major assemblies in the E4981A ...

Page 92: ...k do not perform any servicing unless you are qualified to do so WARNING The opening of covers or removal of parts is likely to expose dangerous voltages Disconnect the instrument from its power supply CAUTION Many of the assemblies in this instrument are very susceptible to damage from ESD electrostatic discharge Perform the following procedures only at a static safe workstation and wear a ground...

Page 93: ...x torque wrench T6 T8 T10 T20 7 mm 3 8 in 5 8 in 3 4 Rack Module Top PSU Deck Assembly PSU Assembly Front Chassis Assembly Front Panel Assembly A34 Analog Board Interface Board PPMC PCA A31 Digital Board Rear Chassis Assembly Plate Assembly Fan Assembly GPIB Assembly Power Inlet Assembly USB Assembly Binding Post Assembly Inverter Assembly Display Support LCD and Display Interface Board Front Pane...

Page 94: ... from the E4981A Step 2 Remove the handle front bumper and rear bumper item 1 2 3 NOTE To remove the handle rotate the handle to a vertical position and pull the arms outwards Step 3 Work the six TORX T20 screws item 4 loose from the bottom Step 4 Remove the 3 4 Rack Module Top Replacement Procedure Step 1 Reverse the order of the removal procedure NOTE Fasten the 3 4 Rack Module Top from the Rack...

Page 95: ...Chapter 6 93 Replacement Procedure 3 4 Rack Module Top Replacement 6 Replacement Procedure Figure 6 1 3 4 Rack Module Top Removal 1 of 2 Figure 6 2 3 4 Rack Module Top Removal 2 of 2 ...

Page 96: ...94 Chapter6 Replacement Procedure 3 4 Rack Module Top Replacement Figure 6 3 Screw Fastening Sequence ...

Page 97: ...the 3 4 rack module top as described in 3 4 Rack Module Top Replacement on page 92 Step 2 Remove a TORX T20 screw item 1 fastening the ground cable Step 3 Lift the PSU Deck Assembly vertically from the Rear Chassis Assembly Step 4 Disconnect the secondary cable item 2 from the A31 Digital Board Step 5 Disconnect the Primary cable item 3 from the PSU Assembly Replacement Procedure Step 1 Reverse th...

Page 98: ...96 Chapter6 Replacement Procedure PSU Deck Assembly Removale Figure 6 4 PSU Deck Assembly Removal ...

Page 99: ...ule top as described in 3 4 Rack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Uncross the insulator item 1 with the PSU Assembly Step 4 Disconnect the secondary cable item 2 from the PSU Assembly NOTE Be careful not to break the hook of connector Step 5 Remove the four TORX T10 screws item 3 fastening the PSU Dec...

Page 100: ...98 Chapter6 Replacement Procedure PSU Assembly Replacement Figure 6 5 PSU Assembly Replacement ...

Page 101: ...ack module top as described in 3 4 Rack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Disconnect the two cables item 1 from the A34 Analog Board Step 4 Disconnect the USB cable item 2 from the Interface Board Step 5 Remove the three TORX T20 screws item 3 fastening the Front Chassis Assembly Replacement Procedure ...

Page 102: ...100 Chapter6 Replacement Procedure Front Chassis Assembly Removal Figure 6 6 Front Chassis Assembly Removal ...

Page 103: ...ed in 3 4 Rack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Front Chassis Assembly as described in Front Chassis Assembly Removal on page 99 Step 4 Release the cable from the cable clamp item 1 Step 5 Remove the five 5 8 inch nuts and washers item 2 fastening the BNC connector Step 6 Remove the A34 Ana...

Page 104: ...102 Chapter6 Replacement Procedure Front Panel Assembly Removal Figure 6 7 Front Panel Assembly Removal ...

Page 105: ...cement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Front Chassis Assembly as described in Front Chassis Assembly Removal on page 99 Step 4 Remove the Front Panel Assembly as described in Front Panel Assembly Removal on page 101 Step 5 Disconnect the cable from the A34 Analog Board Assembly item 1 Step 6 Slide the A34 Analog...

Page 106: ...104 Chapter6 Replacement Procedure A34 Analog Board Assembly Replacement Figure 6 8 A34 Analog Board Assembly Replacement ...

Page 107: ...Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the six TORX T10 screws item 1 fastening the Rear Chassis Step 4 Remove the panel item 2 from the Rear Chassis Step 5 Remove the three TORX T10 screws item 3 fastening the Interface Board Replacement Procedure Step 1 Reverse the order of the removal procedure NOTE Fasten t...

Page 108: ...106 Chapter6 Replacement Procedure Interface Board Assembly Replacement Figure 6 10 Screw Fastening Sequence ...

Page 109: ...Rack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Interface Board Assembly as described in Interface Board Assembly Replacement on page 105 Step 4 Remove the four TORX T8 screws item 1 fastening the A31 Digital Board Assembly Step 5 Disconnect the cable from the GPIB Assembly item 2 Step 6 Remove the C...

Page 110: ...emove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Interface Board Assembly as described in Interface Board Assembly Replacement on page 105 Step 4 Remove the PPMC PCA as described in PPMC PCA Replacement on page 107 Step 5 Remove a 5 8 inch nut item 1 fastening the Rear Chassis Assembly Step 6 Disconnect the Fan cable from the A31 Digital Board Ass...

Page 111: ...Chapter 6 109 Replacement Procedure A31 Digital Board Assembly Replacement 6 Replacement Procedure Figure 6 12 A31 Digital Board Assembly Replacement ...

Page 112: ...ack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Front Chassis Assembly as described in Front Panel Assembly Removal on page 101 Step 4 Remove the four TORX T20 screws item 1 fastening the Rear Chassis Assembly Step 5 Remove the Rear Chassis Assembly Replacement Procedure Step 1 Reverse the order of th...

Page 113: ...2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Front Chassis Assembly as described in Front Panel Assembly Removal on page 101 Step 4 Remove the Rear Chassis Assembly as described in Rear Chassis Assembly Removal on page 110 Step 5 Remove the two TORX T20 screws item 1 fastening the 3 4 Rack Module Bottom Assembly Step 6 Remove the Plate Asse...

Page 114: ...PSU Deck Assembly Removale on page 95 Step 3 Cut the two cable ties item 1 Step 4 Remove a TORX T20 screw item 2 fastening the ground cable Step 5 Disconnect the fan cable from the A31 Digital Board Assembly item 3 Step 6 Push the four rivets item 4 from the inside then remove them fastening the Fan Assembly NOTE If you cannot push the rivets out easily push the rivets out using a flat edge driver...

Page 115: ...Chapter 6 113 Replacement Procedure Fan Assembly Replacement 6 Replacement Procedure Figure 6 15 Fan Assembly Replacement ...

Page 116: ...odule Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Interface Board Assembly as described in Interface Board Assembly Replacement on page 105 Step 4 Disconnect the GPIB cable item 1 from the Rear Panel Step 5 Remove the two 7mm standoff item 2 fastening the GPIB Assembly Step 6 Remove the GPIB Assembly item 3 ...

Page 117: ...ribed in 3 4 Rack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Cut the two cable ties item 1 Step 4 Remove the two TORX T10 screws item 2 fastening the Inlet Assembly Step 5 Remove the Inlet Assembly from the Rear Panel Step 6 Detach the fuse box item 3 from the Inlet Assembly and remove the fuse Replacement Proc...

Page 118: ...116 Chapter6 Replacement Procedure Power Inlet Assembly Replacement Figure 6 17 Power Inlet Assembly Replacement ...

Page 119: ...dule top as described in 3 4 Rack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Disconnect the USB Cable item 1 from the A31 Digital Board Assembly Step 4 Remove the two TORX T10 screws item 2 fastening the Front Panel Assembly Step 5 Remove the USB Assembly from the Front Panel Replacement Procedure Step 1 Revers...

Page 120: ...ack Module Top Replacement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Front Panel Assembly as described in Front Panel Assembly Removal on page 101 Step 4 Remove the 3 8 inch nut and washer item 1 fastening the Binding Post Assembly Step 5 Slide the Binding Post Assembly from the Front Panel Assembly Replacement Procedure ...

Page 121: ...placement on page 92 Step 2 Remove the PSU Deck Assembly as described in PSU Deck Assembly Removale on page 95 Step 3 Remove the Front Panel Assembly as described in Front Panel Assembly Removal on page 101 Step 4 Disconnect the LCD Cable item 1 from the Inverter Assembly Step 5 Disconnect the Cable item 2 from the Inverter Assembly Step 6 Remove the two TORX T6 screws item 3 from the Inverter Ass...

Page 122: ...120 Chapter6 Replacement Procedure Inverter Assembly Replacement Figure 6 20 Inverter Assembly Replacement ...

Page 123: ... Assembly as described in Inverter Assembly Replacement on page 119 Step 5 Disconnect the Display Cable item 1 from the Display Interface Board Assembly Step 6 Release the clamped cable item 2 from the Display Support item 5 Step 7 Disconnect the LVDS Cable item 3 from the Display Interface Board Assembly Step 8 Disconnect the Backlight Cable item 4 from the Display Interface Board Assembly Step 9...

Page 124: ...122 Chapter6 Replacement Procedure Display Support Removal Figure 6 21 Display Support Removal ...

Page 125: ...tep 3 Remove the Front Panel Assembly as described in Front Panel Assembly Removal on page 101 Step 4 Remove the Inverterl Assembly as described in Inverter Assembly Replacement on page 119 Step 5 Remove the Display Support as described in Display Support Removal on page 121 Step 6 Remove the four TORX T6 screws item 1 fastening the LCD Step 7 Remove the LCD from the Display Support with the Displ...

Page 126: ...124 Chapter6 Replacement Procedure LCD and Display Interface Board Replacement Figure 6 22 LCD and Display Interface Board Replacement ...

Page 127: ... page 95 Step 3 Remove the Front Panel Assembly as described in Front Panel Assembly Removal on page 101 Step 4 Remove the Inverterl Assembly as described in Inverter Assembly Replacement on page 119 Step 5 Remove the Display Support as described in Display Support Removal on page 121 Step 6 Remove the two TORX T10 screws item 1 fastening the Front Panel Assembly Step 7 Remove the USB Assembly fro...

Page 128: ...126 Chapter6 Replacement Procedure Front Panel Key Pad and Key Flex Circuit Replacement Figure 6 23 Front Panel Key Pad and Key Flex Circuit Replacement ...

Page 129: ...127 7 Post Repair Procedures 7 Post Repair Procedures This chapter lists the procedures required to verify the E4981A operation after an assembly is replaced with a new one ...

Page 130: ...rform the following required adjustments using A34 Board in Spot Adjustment of the program Write Null phase track default data Null DC offset Adjustment Null ADC DC offset Adjustment ADC Linearity Adjustment DC Bias Adjustment DC level V monitor Adjustment for opt 001 DC level I monitor Adjustment for opt 001 DC Source Adjustment for opt 001 DCR Adjustment for opt 001 Impedance Adjustment AC Level...

Page 131: ... adjustment needed Inspect the booting process and power on test result To Check the Front Panel on page 56 Interface Board No adjustment needed Inspect the booting process and power on test result To Check the Handler Interface Function on page 60 To Check the Scanner Interface Function on page 64 Table 7 1 Post Repair Procedures Replaced Assembly or Part Required Adjustments Correction Constants...

Page 132: ...130 Chapter7 Post Repair Procedures Post Repair Procedures ...

Page 133: ... required to adapt this manual to versions or configurations of the E4981A manufactured earlier than the current printing date of this manual The information in this manual applies directly to E4981A units with the serial number that is printed on the title page of this manual ...

Page 134: ... The ten character serial number is stamped on the serial number plate Figure A 1 on the rear panel Figure A 1 Serial Number Plate Example Table A 1 Manual Changes by Serial Number Serial Prefix or Number Make Manual Changes Table A 2 Manual Changes by Firmware Version Version Make Manual Changes 㪼㪋㪐㪏㪈㪸㫊㪼㪈㪇㪇㪈 MY12345678 E4981A ...

Page 135: ...133 B Firmware Update B Firmware Update This appendix describes how to update the E4981A firmware When you want to update the E4981A firmware refer to this appendix ...

Page 136: ...terminal in the E4981A rear panel Then turn the E4981A on Step 2 Copy the following file from Keysight Technologies web site to the temporary work folder in your computer s HDD fw_upd exe Step 3 Execute the Command Prompt on your computer Step 4 Change the current folder to the temporary working folder with the fw_upd exe file using cd command Step 5 Enter fw_upd exe GPIB0 17 INSTR command to exec...

Page 137: ...erminal in the E4981A rear panel Then turn the E4981A on Step 2 Copy the following file from Keysight Technologies web site to the temporary work folder in your computer s HDD fw_upd exe Step 3 Execute the Command Prompt on your computer Step 4 Change the current folder to the temporary working folder with the fw_upd exe file using cd command Step 5 Enter fw_upd exe USB0 2391 2313 MY12345678 0 INS...

Page 138: ...136 AppendixB Firmware Update Update the E4981A firmware using USB cable ...

Page 139: ...137 1 Chapter Title 2 Chapter Title 4 Chapter Title 5 Chapter Title C Power Requirement C Power Requirement ...

Page 140: ...s are available from Keysight Technologies sales office To check or replace the fuse disconnect the power cable and pull out the fuse holder refer to Figure C 1 towards you refer to Figure C 2 Figure C 1 Fuse holder and power cable socket Figure C 2 Removing the fuse Table C 1 Fuse Selection Fuse Rating Type Fuse Part Number 3A 250Vac UL CSA type Time Delay 2110 1017 㪼㪋㪐㪏㪇㪸㫊㪼㪈㪇㪊㪐 Power cable recep...

Page 141: ... international safety standards this instrument is equipped with a three wire power cable When connected to an appropriate ac power outlet this cable grounds the instrument frame The type of power cable shipped with each instrument depends on the country of destination Power cord list 16000 99101 shows the power cable options WARNING For protection from electrical shock the power cable ground must...

Page 142: ...140 AppendixC Power Requirement Power Requirements ...

Page 143: ...141 D Error Messages D Error Messages The Keysight E4981A provides error messages to indicate its operating status This appendix describes the error messages of the E4981A in alphabetical order ...

Page 144: ... error with a positive error number is one uniquely defined for this instrument On the other hand an error with a negative error number is basically one defined for common GPIB devices in IEEE488 2 1 100 21 1 MHz opt not installed This error occurs when cable correction commands are sent to E4981A with Option 002 via GPIB LAN USB This error is not generated with front panel operation A 1103 A1 EEP...

Page 145: ...ossible data elements For example numeric value or string data is expected but block data is sent 222 Data out of range A data element that does not violate the standard has been received out of the range defined for the E4981A 230 Data corrupt or stale The data is invalid or a newly initiated read operation has not been completed since the latest access E 123 Exponent too large The absolute value...

Page 146: ...tor has been sent For example although the correct way is to use to separate two sent program messages such as CALC1 FORM CP OPC the semicolon needed to separate the program messages is missing to give CALC1 FORM CP OPC 121 Invalid character in number An invalid character for the data type of the syntax analysis target has been received For example alphabetical characters exist in a decimal value ...

Page 147: ...C1 FORM CP a wrong program message CALC1 FORM RP was received L 46 LOAD measurement incomplete This error occurs when the cable correction LOAD measurement is incomplete M 43 Measurement failed A measurement failure has occurred during measuring the correction data 109 Missing parameter The number of parameters is less than required by the command For example although the CREJ LIM command requires...

Page 148: ...or This indicates that an error has occurred due to insufficient space in the queue but has not been recorded 400 Query error A comprehensive Query error has occurred for which the E4981A cannot detect further details This code simply indicates the occurrence of a Query error that is defined in IEEE488 2 11 5 1 1 7 and 6 3 410 Query INTERRPUTED This indicates the status that causes an INTERRUPTED ...

Page 149: ...which you purchased the device 102 Syntax error There is a command or data type that cannot be recognized For example in the program message SYST PRES a colon is inserted by mistake to give SYST PRES 134 Suffix too long The length of suffix is long 138 Suffix not allowed A suffix is added to a numeric value element that does not permit a suffix 150 String data error An error not included in the er...

Page 150: ...rigger state 214 Trigger deadlock Indicates that the READ command was ignored because the trigger source setting was MAN or BUS 223 Too much data The received block equation or string type program data complies with the standard but the amount of data exceeds the limit that the E4981A can handle due to memory or device specific conditions related to memory U 113 Undefined header A header not defin...

Page 151: ...e the LOAD correction is turned ON but you need to measure the LOAD correction data again for accurate measurement WARNING Need open meas This is displayed when you turn ON the OPEN correction from the front panel although the setups of the cable length and measurement frequency shift 1 MHz differ from those when measuring setting up the OPEN correction data In this case the OPEN correction is tur...

Page 152: ... state file The setting file recalled from external mass storage device has been saved using an E4981A with a different firmware version or different options There may be some parameters set up incorrectly Check the setting This message may appear due to option mismatch firmware mismatch check sum error or state format mismatch WARNING No external clock This message appears when there is no extern...

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