Keysight E4980A User manual

Service Guide
KeysightE4980A/E4980AL
Precision LCR Meter

Notices
© Keysight Technologies
2006-2019
No part of this manual may be
reproduced in any form or by any
means(includingelectronicstorageand
retrieval or translation into a foreign
language)withoutprioragreementand
written consent from Keysight
Technologies, Inc. as governed by
United States and international
copyright laws.
Trademark Acknowledgments
Manual Part Number
E4980-90120
Edition
Edition 8, September 2019
Printed in Malaysia
Published by:
Keysight Technologies International
Japan G.K,
1-3-3 Higashikawasaki-cho
Chuo-ku
Kobe-shi, Hyogo, Japan
Warranty
THE MATERIAL CONTAINED IN
THIS DOCUMENT IS PROVIDED
“AS IS,” AND IS SUBJECT TO
BEING CHANGED, WITHOUT
NOTICE, IN FUTURE EDITIONS.
FURTHER, TO THE MAXIMUM
EXTENT PERMITTED BY
APPLICABLE LAW, KEYSIGHT
DISCLAIMS ALL WARRANTIES,
EITHER EXPRESS OR IMPLIED
WITH REGARD TO THIS MANUAL
AND ANY INFORMATION
CONTAINED HEREIN, INCLUDING
BUT NOT LIMITED TO 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 CONFLICT
WITH THESE TERMS, THE
WARRANTY TERMS IN THE
SEPARATE AGREEMENT WILL
CONTROL.
Technology Licenses
The hardware and/or software
described in this document are
furnishedunderalicenseandmaybe
usedorcopiedonlyinaccordancewith
the terms of such license.
Declaration of Conformity
Declarations of Conformity for this
productandforotherKeysightproducts
maybedownloadedfromtheWeb.Go
to
http://www.keysight.com/go/confor
mity. You can then search by product
numbertofindthelatestDeclarationof
Conformity.
U.S. Government Rights
TheSoftwareis“commercialcomputer
software,” as defined by Federal
AcquisitionRegulation(“FAR”) 2.101.
PursuanttoFAR12.212and27.405-3
and Department of Defense FAR
Supplement(“DFARS”)227.7202,the
U.S.governmentacquirescommercial
computer software under the same
terms by which the software is
customarily provided to the public.
Accordingly, Keysight provides the
SoftwaretoU.S.governmentcustomers
underitsstandardcommerciallicense,
which is embodied in its End User
License Agreement (EULA), a copy of
which can be found at
http://www.keysight.com/find/sweul
aThe license set forth in the EULA
represents the exclusive authority by
which the U.S. government may use,
modify, distribute, or disclose the
Software.TheEULAandthelicenseset
forththerein,doesnotrequireorpermit,
amongotherthings,thatKeysight:(1)
Furnishtechnicalinformationrelatedto
commercial computer software or
commercial computer software
documentationthatisnotcustomarily
provided to the public; or (2)
Relinquishto,orotherwiseprovide,the
government rights in excess of these
rights customarily provided to the
public to use, modify, reproduce,
release, perform, display, or disclose
commercial computer software or
commercial computer software
documentation. No additional
governmentrequirementsbeyondthose
set forth in the EULA shall apply,
excepttotheextentthatthose terms,
rights,orlicensesareexplicitlyrequired
from all providers of commercial
computersoftwarepursuanttotheFAR
and the DFARS and are set forth
specificallyinwritingelsewhereinthe
EULA. Keysight shall be under no
obligationtoupdate,reviseorotherwise
modify the Software. With respect to
any technical data as defined by FAR
2.101, pursuant to FAR 12.211 and
27.404.2 and DFARS 227.7102, the
U.S. government acquires no greater
thanLimitedRights as defined in FAR
27.401 or DFAR 227.7103-5 (c), as
applicable in any technical data.
Safety Notices
A CAUTION notice denotes a hazard. It
calls attention to an operating
procedure,practice,orthelikethat,if
notcorrectlyperformedoradheredto,
couldresultindamagetotheproductor
lossofimportantdata.Donotproceed
beyond a CAUTION notice until the
indicated conditions are fully
understood and met.
AWARNINGnoticedenotesahazard.It
calls attention to an operating
procedure,practice,orthelikethat,if
notcorrectlyperformedoradheredto,
couldresultinpersonalinjuryordeath.
Do not proceed beyond a WARNING
noticeuntiltheindicatedconditionsare
fully understood and met.

3
Keysight E4980A/E4980AL Precision LCR Meter
Service Guide
Caution
Safety Summary
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.
• Instrument operates abnormally.
• Instrument emits abnormal noise, smell, smoke or a spark-like light during
operation.
• Instrument generates high temperature or electrical shock during
operation.
• Power cable, plug, or receptacle on instrument is damaged.
• Foreign substance or liquid has fallen into the instrument.
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. Protect them from ESD damage by wearing
agroundingstrap that providesahighresistance path toground. Alternatively,
ground yourself to discharge any static charge built-up by touching the outer
shell of any grounded instrument chassis before touching the test port
connectors.

4 Keysight E4980A/E4980AL Precision LCR Meter
Caution
Manufacturer’s Declaration
-
Manufacturer’s Declaration
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.
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

Keysight E4980A/E4980AL Precision LCR Meter 5
Caution
Safety Notice Supplement
Safety Notice Supplement
• This equipment complies with EN/IEC61010-1:2001.
• This equipment is of MEASUREMENT CATEGORY I (CAT I). Do not use for
CAT II, III, or IV.
• Do not connect the measuring terminals to mains.
• 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
system component, compliance of related regulations and safety
requirements are to be confirmed by the builder of the system.

6 Keysight E4980A/E4980AL Precision LCR Meter
Caution
General Safety Precautions
-
General Safety Precautions
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific WARNINGS elsewhere in this manual may impair
the protection provided by the equipment. Such noncompliance would also
violate safety standards of design, manufacture, and intended use of the
instrument. Keysight Technologies assumes no liability for the customer’s
failure to comply with these precautions.
• 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 gases or
fumes. Operation of any electrical instrument in such an environment
clearly constitutes a safety hazard.
• Keep Away from Live Circuits
Operators must not remove instrument covers. Component replacement
and internal adjustments must be made by qualified maintenance
personnel. Do not replace components with the power cable connected.
Under certain conditions, dangerous voltage levels may remain even after
the power cable has been disconnected. To avoid injuries, always
disconnect the power and discharge circuits before touching them.
• DO NOT Service or Adjust the Instrument Alone
Do not attempt internal service or adjustment unless another person,
capable of rendering first aid and resuscitation, is present.
• Do NOT Substitute Parts or Modify the Instrument
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 Service Office
for service and repair to ensure that safety features are maintained in
operational condition.
The E4980A/E4980AL complies with INSTALLATION CATEGORY II as well
as POLLUTION DEGREE 2 in IEC61010-1. The E5061B is an INDOOR USE
product.
The LEDs in the E4980A/E4980AL are Class 1 in accordance with
IEC60825-1, CLASS 1 LED PRODUCT.

Keysight E4980A/E4980AL Precision LCR Meter 7
Caution
Safety Symbols
• Dangerous Procedure Warnings
Warnings, such as the example below, precede potentially dangerous
procedures throughout this manual. Instructions contained in the warnings
must be followed.
Safety Symbols
General definitions of safety symbols used on the instrument or in manuals are
listed below.
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.
Dangerous voltage levels, capable of causing death, are present in this
instrument. Use extreme caution when handling, testing, and adjusting
this instrument.
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.
Direct current.
On (Supply).
Off (Supply).
A chassis terminal; a connection to the instrument’s chassis,
which includes all exposed metal structure.
Standby.

8 Keysight E4980A/E4980AL Precision LCR Meter
Caution
Safety Symbols
-
Documentation Warranty
The material contained in this document is provided “as is,” and is subject to
being changed, without notice, in future editions. Further, to the maximum
extent permitted by applicable law, Keysight disclaims all warranties, either
express or implied with regard to this manual and any information contained
herein, including but not limited to 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 conflict with these terms, the
warranty terms in the separate agreement will control.
Exclusive Remedies
The remedies provided herein are Buyer’s sole and exclusive remedies.
Keysight Technologies shall not be liable for any direct, indirect, special,
incidental, or consequential damages, whether based on contract, tort, or any
other legal theory.
Assistance
Product maintenance agreements and other customer assistance agreements
are available for Keysight Technologies products.
For any assistance, contact your nearest Keysight Technologies Sales and
Service Office. Addresses are provided at the back of this manual.

Keysight E4980A/E4980AL Precision LCR Meter 9
Caution
Manuals for E4980A/E4980AL
Manuals for E4980A/E4980AL
Keysight provides the following three manuals for E4980A/E4980AL. The latest
version of all documentations can be downloaded from
http://www.keysight.com/manual/e4980a.
Installation Guide
The installation guide (this manual) provides start up setup information when
you use the E4980A/E4980AL for the first time and troubleshooting
information when the Windows cannot be boot up. See this manual first when
you use the E4980A/E4980AL for the first time.
Service Guide
The service guide (this manual) provides troubleshooting information when
operational problems are encountered on the E4980A/E4980AL. See this
manual when you need to troubleshoot the E4980A/E4980AL.

10 Keysight E4980A/E4980AL Precision LCR Meter
Caution
Manuals for E4980A/E4980AL
-

Contents
Keysight E4980A/E4980AL Service Guide 11
Table of Contents
Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Manufacturer’s Declaration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Regulatory Compliance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Notice Supplement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Safety Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Documentation Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Exclusive Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Manuals for E4980A/E4980AL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Service Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1. General Information
Organization of Service Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Instruments Covered by This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2. Performance Test
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Test Equipment Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Individual Test Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1. Frequency Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2. DC Source Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3. DC Bias Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4. DC Bias V Level Monitor Accuracy Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5. DC Bias I Level Monitor Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6. AC Signal Level Monitor Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7. AC Signal Level Accuracy Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8. Impedance Measurement Accuracy Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9. DCR Measurement Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3. Adjustment
Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Warm-up for Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

12 KeysightE4980A/E4980ALServiceGuide
Contents
Required Adjustment after Replacing Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Writing ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Write Null Phase Track Default Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Null DC Offset Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Null ADC DC Offset Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
ADC Linearity Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
DC Bias Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
DC Level V Monitor Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
DC Level I Monitor Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
DC Source Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
DCR Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Impedance Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
AC Level Monitor Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
OSC Level Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4. Troubleshooting
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
To Troubleshoot the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Primary Trouble Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Power On Sequence Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Check the Line Voltage and Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Check the Power Supply Unit Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Check booting process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Troubleshooting Using Service Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Power On Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Contents of the power on test results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
SERVICE Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Power On Test / Self Test Failure Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Function Specific Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
To Check the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
To Check the LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
To Check the Front USB port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
To Check the External Trigger Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
To Check the LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
To Check the GPIB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
To Check the USB (USBTMC) Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
To Check the Handler Interface Function (Option 201 only) . . . . . . . . . . . . . . . . . . . . . . .52
To Check the Scanner Interface Function (Option 301 only) . . . . . . . . . . . . . . . . . . . . . . .57
To Check the Bias Current Interface Function (Option 002 only). . . . . . . . . . . . . . . . . . . .60
Performance test failure troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Contents
Keysight E4980A/E4980AL Service Guide 13
Recommended adjustment for performance test failure . . . . . . . . . . . . . . . . . . . . . . . . . 65
Adjustment failure troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Performance test failure troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
5. Replaceable Parts
Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
6. Replacement Procedure
Replacing an Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
3/4 Rack Module Top Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
A3 Analog Daughter Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
A2 Analog Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Front Panel Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Tools required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Option Interface Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
PPMC PCA Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
A1 Mother Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Power Supply Assembly Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

14 KeysightE4980A/E4980ALServiceGuide
Contents
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Base Plate Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Rear Panel Assembly Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
FAN Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
GPIB Cable Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Power Inlet Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
PCA E4980 USB Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Binding Post Sgl Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Inverter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Front Panel, Key Pad, and Key Flex Circuit Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Display Interface Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Tools Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Contents
Keysight E4980A/E4980AL Service Guide 15
7. Post-Repair Procedures
Post-Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
A.Manual Changes
Manual Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
B.Firmware Update
Update the E4980A/ E4980AL firmware using USB/GPIB interface. . . . . . . . . . . . . . . . . . . 117
Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
How to update E4980A/ E4980AL firmware using USB/GPIB interface. . . . . . . . . . . . . 117
Update the E4980A/ E4980AL firmware using USB cable . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
How to update E4980A/ E4980AL firmware using USB cable . . . . . . . . . . . . . . . . . . . . 119
C.Power Requirement
Replacing Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Fuse Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Setting up the fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
D.Error Messages
Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

16 KeysightE4980A/E4980ALServiceGuide
Contents
V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
Warning Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
Numeric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

17
Keysight E4980A/E4980AL Precision LCR Meter
Service Guide
1 General Information
This Service Guide is a guide to servicing the E4980A & E4980AL 20Hz to
300kHz/ 500kHz/ 1MHz/ 2MHz Precision LCR Meter. The Service Guide
provides information about performance test, adjustment, troubleshooting,
and repairing the instrument.
Organization of Service Guide
Tabs are used to divide the major chapter and appendix of this manual. The
contents of each chapter and appendix in this manual as follows.
•Chapter 1, “General Information.”
This Service Guide is a guide to servicing the E4980A & E4980AL 20Hz to
300kHz/ 500kHz/ 1MHz/ 2MHz Precision LCR Meter. The Service Guide
provides information about performance test, adjustment, troubleshooting,
and repairing the instrument.
•Chapter 2, “Performance Test.”
This chapter provides the outline of the E4980A/ E4980AL performance
tests.
•Chapter 3, “Adjustment.”
This chapter provides the adjustment information for the E4980A/ E4980AL
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 E4980A/ E4980AL, it should be sent to the nearest
Keysight Technologies service office.
•Chapter 4, “Troubleshooting.”
This chapter provides the procedure to isolate a faulty assembly in the
E4980A/ E4980AL.
•Chapter 5, “Replaceable Parts.”
This chapter contains information for ordering replacement parts for the
E4980A/ E4980AL.

18 Keysight E4980A/E4980AL Precision LCR Meter
General Information
Organization of Service Guide
1-
•Chapter 6, “Replacement Procedure.”
This chapter provides procedure for removing and replacing the major
assemblies in the E4980A/ E4980AL.
•Chapter 7, “Post-Repair Procedures.”
This chapter lists the procedures required to verify the E4980A/ E4980AL
operation after an assembly is replaced with a new one.
•Appendix A , “Manual Changes,”
This appendix contains the information required to adapt this manual to
versions or configurations of the E4980A/ E4980AL manufactured earlier
than the current printing date of this manual. The information in this manual
applies directly to E4980A/ E4980AL units with the serial number that is
printed on the title page of this manual.
•Appendix B , “Firmware Update,”
This appendix describes how to update the E4980A/ E4980AL firmware.
When you want to update the E4980A/ E4980AL firmware, refer to this
appendix.
•Appendix C , “Power Requirement,”
•Appendix D , “Error Messages,”
The Keysight E4980A/ E4980AL provides error messages to indicate its
operating status. This appendix describes the error messages of the
E4980A/ E4980AL in alphabetical order.

Keysight E4980A/E4980AL Precision LCR Meter 19
General Information
Instruments Covered by This Manual
Instruments Covered by This Manual
The ten-character serial number is printed on the serial number label on the
rear panel.
An instrument manufactured after the printing date of this manual may have
serial number prefix that is not listed on the title page. This unlisted serial
number prefix indicates the instrument is different from those described in this
manual. The manual for this new instrument may be accompanied by a yellow
Manual Changes supplement or have 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 supplement. The supplement for this
manual is identified by this manual’s printing data and is available from
Keysight Technologies. If the serial prefix or number of an instrument is lower
than that on the title page of this manual, see Appendix A, Manual Changes.
For information concerning, a serial number prefix that is not listed on the title
page or in the Manual Changes supplement, contact the nearest Keysight
Technologies office.

20 Keysight E4980A/E4980AL Precision LCR Meter
General Information
Required Equipment
1-
Required Equipment
Table 1-1 lists the recommended equipment for performance test, adjustment
and troubleshooting for E4980A/ E4980AL.
Table 1-1 Recommended Test Equipment
Equipment Critical Specifications Recommended Model Qty. Use1
Frequency Counter Frequency Range: 1 MHz
Time Base Error < 50 ppm/year Keysight 53181A 1 P
Digital Multimeter No Substitute Keysight 3458A 1 P,A
Standard Capacitors Set No Substitute 16380A 1 P,A
Standard Capacitors Set No Substitute 16380C with option
001 1P
Four Terminal Pair
Standard Resistor Set No Substitute Keysight 42030A 1 P,A
4TP Open Termination No Substitute Keysight 42090A 1 P,A
4TP Short Termination No Substitute Keysight 42091A 1 P,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
Test Leads (BNC), 4 m No Substitute Keysight 16048E 1 P,A
DC Power Supply + 5V, 0.1A Keysight E3610A 1 T
Handler Simulator No Substitute p/n 04278-65001 1 T
Scanner Simulator No Substitute p/n 04278-65301 1 T
Bias Interface Simulator No Substitute p/n 42841-65001 1 T
Bias Interface Cable GP-IO Cable p/n 42841-61640 1 T
Interface Box No Substitute p/n 04294-61002 1 P,A
Cables BNC(m)-BNC(m) Cable, 122 cm p/n 8120-1840 1 P,A
Adapter BNC(f)-BNC(f) Adapter p/n 1250-1830 4 P,A
Dual Banana-BNC(f) Adapter p/n 1251-2277 1 P,A
1. P:Performance Test A:Adjustment T:Troubleshooting