Keysight Technologies InfiniVision 6000L Series Service Manual

Keysight InfiniVision
6000L Series
Oscilloscopes

Service Guide

Notices

CAUTION

WARNING

© Keysight Technologies, Inc. 2005-2019

No part of this manual may be reproduced in
any form or by any means (including elec­tronic storage and retrieval or translation into
a foreign language) without prior agreement
and written consent from Keysight Technolo­gies, Inc. as governed by United States and
international copyright laws.

Manual Part Number

54684-97035, October 2019

54684-97001, February 2005
54684-97003, April 2005
54684-97008, January 2006
54684-97010, June 2006
54684-97014, November 2006
54684-97018, March 2007
54684-97021, April 2007
54684-97026, March 2008
54684-97029, August 2008
54684-97033, January 2013
54684-97034, January 2017
54684-97035, October 2019

Published by:
Keysight Technologies, Inc.
1900 Garden of the Gods Road
Colorado Springs, CO 80907 USA

A newer version of this manual may
be available at

www.keysight.com/find/
6000manual

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 of 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 shall control.

Technology Licenses

The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in accor­dance with the terms of such license.

U.S. Government Rights

The Software is "commercial computer
software," as defined by Federal Acquisition
Regulation ("FAR") 2.101. Pursuant to FAR

12.212 and 27.405-3 and Department of
Defense FAR Supplement ("DFARS")

227.7202, the U.S. government acquires
commercial computer software under the
same terms by which the software is
customarily provided to the public.
Accordingly, Keysight provides the Software
to U.S. government customers under its
standard commercial license, which is
embodied in its End User License Agreement
(EULA), a copy of which can be found at

www.keysight.com/find/sweula. The

license set forth in the EULA represents the
exclusive authority by which the U.S.
government may use, modify, distribute, or
disclose the Software. The EULA and the
license set forth therein, does not require or
permit, among other things, that Keysight: (1)
Furnish technical information related to
commercial computer software or
commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish to, or
otherwise provide, 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 government
requirements beyond those set forth in the
EULA shall apply, except to the extent that
those terms, rights, or licenses are explicitly
required from all providers of commercial
computer software pursuant to the FAR and
the DFARS and are set forth specifically in
writing elsewhere in the EULA. Keysight shall
be under no obligation to update, revise or
otherwise 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 than Limited Rights as
defined in FAR 27.401 or DFAR 227.7103-5
(c), as applicable in any technical data.

A CAUTION notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that,
if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.

A WARNING notice denotes a haz­ard. It calls attention to an operat­ing procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in personal
injury or death. Do not proceed
beyond a WARNING notice until the
indicated conditions are fully
understood and met.

2 6000L Series Oscilloscopes Service Guide

In This Service Guide

This book provides the service information for the Keysight 6000L Series
oscilloscopes. This manual is divided into these chapters:

1 Characteristics and Specifications

This chapter lists characteristics and specifications for the Keysight 6000L Series
oscilloscopes.

2 Testing Performance

This chapter explains how to verify correct oscilloscope operation and perform
tests to ensure that the oscilloscope meets the performance specifications.

3 Calibrating and Adjusting

This chapter explains how to adjust the oscilloscope for optimum operating
performance.

4 Troubleshooting

This chapter begins with suggestions for solving general problems that you may
encounter with the oscilloscope. Procedures for troubleshooting the oscilloscope
follow the problem solving suggestions.

5 Replacing 6000L Assemblies

This chapter describes how to remove assemblies from the 6000L Series
oscilloscope.

6Replaceable Parts

This chapter describes how to order replaceable assemblies and parts for the
Keysight 6000L Series oscilloscopes. It includes diagrams and parts lists for
hardware that you can order.

7Safety Notices

At the front of the book you will find safety notice descriptions and document
warranties.

6000L Series Oscilloscopes Service Guide 3

Using this book with the 6000L Series oscilloscopes

The 6000L Series oscilloscopes do not have a built-in display or front panel control keys. If you are
using a 6000L Series oscilloscope, and this book refers to using front panel controls, you can use the
built-in Web control feature described in the 6000L Series Oscilloscopes User’s Guide to complete the
instructions. If you do not have the 6000L Series Oscilloscopes User’s Guide, you may obtain a
printable electronic copy at www.Keysight.com/find/6000manual.

Digital Channels

Because all of the oscilloscopes in the Keysight 6000L Series have analog channels, the analog channel
topics in this book apply to all instruments. Whenever a topic discusses the digital channels, that
information applies to DSO models that have been upgraded to an MSO only.

Abbreviated instructions for pressing a series of keys

Instructions for pressing a series of keys are written in an abbreviated manner. Instructions for pressing
Key1, then pressing Softkey2, then pressing Softkey3 are abbreviated as follows:
Press [Key1] & Softkey2 & Softkey3.
The keys may be front panel keys, or softkeys, which are located directly below the oscilloscope
display.

Warranty Status

To find the warranty status of your oscilloscope:

1 Direct your web browser to: www.keysight.com/find/warrantystatus
2 Enter your product’s model number and serial number. The system will search

for the warranty status of your product and display the results. If the system
cannot find your product’s warranty status, select Contact Us and speak with an
Keysight Technologies representative.

4 6000L Series Oscilloscopes Service Guide

Contents

Figures / 9

Tab les / 11

1 Characteristics and Specifications

Power Requirements / 14

6000L Models / 14

Measurement Category / 15

Measurement Category / 15
Measurement Category Definitions / 15
6000L Series Maximum Input Voltages / 16

6000L Environmental Conditions / 17

Specifications / 18

Contact Us / 18

2 Testing Performance

Overview / 20

Conventions / 20

List of Test Equipment / 21

To construct the test connector (for use with MSO models

only) / 22

To test digital channels (MSO models only) / 24

To verify digital channel threshold accuracy (MSO models

only) / 25
When to Test / 25

6000L Series Oscilloscopes Service Guide 5

Contents

What to Test / 25
Verifying Test Results / 25

To verify voltage measurement accuracy / 29

To verify bandwid th / 33

To verify time scale accuracy / 37

To verify horizontal delta t accuracy / 39

To verify trigger sensitivity / 41

Test Internal Trigger Sensitivity / 42
Test External Trigger Sensitivity / 43

Keysight 6000L Series Oscilloscopes Performance Test Record / 46

3 Calibrating and Adjusting

User Calibration / 51

To perform User C al / 51
User Cal Status / 53

4 Troubleshooting

Solving General Problems with the Oscilloscope / 56

Troubleshooting the Oscilloscope / 59

Equipment required for troubleshooting / 59
To check out the oscilloscope / 60
To verify basic oscilloscope operation / 62
To compensate the analog probes / 63
Troubleshooting Flowchart / 64
To check the 6000L Series oscilloscope power supply / 65
To check the 6000L Series system board / 67
To check the 6000L Series display output / 68
To check the fan / 68
To run the internal self-tests / 68
To verify default setup / 69

6 6000L Series Oscilloscopes Service Guide

5 Replacing 6000L Assemblies

To remove the bottom cover / 73

To remove the front panel assembly / 74

To remove the system board / 76

To remove the power supply / 79

To remove the fan / 81

To remove the AC power input assembly / 83

To remove the power shaft / 85

6 Replaceable Parts

Ordering Replaceable Parts / 88

Listed Parts / 88
Unlisted Parts / 88
Direct Mail Order System / 88
Exchange Assemblies / 89

Contents

Replaceable Parts for 6000L Series Oscilloscopes / 90

6000L Series Oscilloscope Exploded Views / 90
6000L Series Oscilloscope Replaceable Parts List / 92

7 Safety Notices

Warnings / 96

To clean the instr ument / 97

Safety Symbols / 98

Index

6000L Series Oscilloscopes Service Guide 7

Contents

8 6000L Series Oscilloscopes Service Guide

Figures

Figure 1. Constructing the 8-by-2 Connector / 23
Figure 2. Setting Up Equipment and Test Connector for the Threshold Test / 26
Figure 3. Connect equipment for voltage measurement accuracy test / 31
Figure 4. Using a Blocking Capacitor to Reduce Noise / 32
Figure 5. Connect equipment for bandwidth test / 34
Figure 6. Connect equipment for internal trigger sensitivity test / 42
Figure 7. Connect equipment for external trigger sensitivity test / 44
Figure 8. User Calibration cable for 4-channel oscilloscope / 52
Figure 9. 6000L Series LED indicators / 61
Figure 10. Example pulses / 63
Figure 11. System Board Test Points / 66
Figure 12. Default setup screen / 70
Figure 13. Removing the cover / 73
Figure 14. Removing the intensity knob / 74
Figure 15. Disconnecting ribbon cable and releasing tab retainers / 75
Figure 16. Preparing to remove the system board / 76
Figure 17. Avoid damage to thermal pads (500 MHz models only) / 77
Figure 18. Removing the power supply. / 79
Figure 19. Removing the fan. / 81
Figure 20. Installing the fan. / 82
Figure 21. Removing the AC power input board. / 84
Figure 22. Removing the power shaft. / 85
Figure 23. 6000L Series Oscilloscope Exploded View / 91

6000L Series Oscilloscopes Service Guide 9

Figures

10 6000L Series Oscilloscopes Service Guide

Tables

Table 1. Conventions / 20
Table 2. List of test equipment / 21
Table 3. Materials required to construct the test connectors / 22
Table 4. Equipment Required to Test Digital Channel Threshold Accuracy / 25
Table 5. Threshold Accuracy Voltage Test Settings / 27
Table 6. Equipment Required to Verify Voltage Measurement Accuracy / 29
Table 7. Settings Used to Verify Voltage Measurement Accuracy / 30
Table 8. Equipment Required to Verify Bandwidth / 33
Table 9. Equipment Required to Verify Time Scale Accuracy / 37
Table 10. Equipment Required to Verify Horizontal Dt Accuracy / 39
Table 11. Equipment Required to Verify Trigger Sensitivity / 41
Table 12. Equipment Required to Troubleshoot the Oscilloscope / 60
Table 13. System Board Test Points / 67
Table 14. 6000L Series Oscilloscope Replaceable Parts / 92

6000L Series Oscilloscopes Service Guide 11

Tables

12 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

Service Guide

1 Characteristics and

Specifications

Power Requirements / 14
Measurement Category / 15
6000L Environmental Conditions / 17
Specifications / 18
Contact Us / 18

This chapter contains a partial list of characteristics and specifications for the
Keysight InfiniiVision 6000L Series Oscilloscopes.

For a full list of Keysight InfiniiVision 6000L Series Oscilloscopes characteristics
and specifications see the data sheet.

The data sheet is available at www.keysight.com/find/6000.

13

1 Characteristics and Specifications

Power Requirements

6000L Models

Line voltage, frequency, and power:

• ~Line 100-240 Vac,

• 50/60 Hz

•80W max

14 6000L Series Oscilloscopes Service Guide

Measurement Category

WARNING

Measurement Category

The InfiniiVision oscilloscopes are not intended to be used for measurements in
Measurement Category II, III, or IV.

Use this instrument only for measurements within its specified measurement category
(not rated for CAT II, III, IV). No transient overvoltages allowed.

Measurement Category Definitions

The "Not rated for CAT II, III, IV" measurement category is for measurements
performed on circuits not directly connected to MAINS. Examples are
measurements on circuits not derived from MAINS, and specially protected
(internal) MAINS derived circuits. In the latter case, transient stresses are variable;
for that reason, the transient withstand capability of the equipment is made known
to the user.

Measurement category II is for measurements performed on circuits directly
connected to the low voltage installation. Examples are measurements on
household appliances, portable tools and similar equipment.

Characteristics and Specifications 1

6000L Series Oscilloscopes Service Guide 15

Measurement category III is for measurements performed in the building
installation. Examples are measurements on distribution boards, circuit-breakers,
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the
fixed installation, and equipment for industrial use and some other equipment, for
example, stationary motors with permanent connection to the fixed installation.

Measurement category IV is for measurements performed at the source of the
low-voltage installation. Examples are electricity meters and measurements on
primary overcurrent protection devices and ripple control units.

1 Characteristics and Specifications

CAUTION

CAUTION

6000L Series Maximum Input Voltages

Maximum input voltage at analog inputs

Do not exceed the maximum input voltage rating.

The maximum input voltage for the 50 Ω input impedance setting is ±5 V.

Input protection is enabled in 50 Ω mode and the 50 Ω load will disconnect if greater
than 5 Vrms is detected. However the inputs could still be damaged, depending on the
time constant of the signal. The 50 Ω input protection functions only when the
oscilloscope is powered on.

The maximum input voltage for the 1 MΩ input impedance setting is 30 Vrms or
±40 Vmax (DC+Vpeak)

Probing technology allows for testing of higher voltages; the included 10073D 10:1 probe
supports 300 Vrms or ±400 Vmax (DC+Vpeak). No transient overvoltage allowed.

Maximum input voltage at digital channels

±40 V peak

16 6000L Series Oscilloscopes Service Guide

6000L Environmental Conditions

Environment Indoor use only.

Ambient temperature Operating –10 °C to +40 °C; non-operating –40 °C to

+70 °C

Humidity Operating 95% RH at 40 °C for 24 hr; non-operating 90% RH at 65 °C

for 24 hr

Altitude Operating to 2,000 m (6,561 ft); non-operating to 15,244 m (50,000 ft)

Overvoltage Category This product is intended to be powered by MAINS that

comply to Overvoltage Category II, which is typical of cord-and-plug connected
equipment.

Pollution Degree The InfiniiVision 6000L Series oscilloscopes may be operated

in environments of Pollution Degree 2 (or Pollution Degree 1).

Characteristics and Specifications 1

Pollution Degree Definitions Pollution Degree 1: No pollution or only dry,

non-conductive pollution occurs. The pollution has no influence. Example: A clean
room or climate controlled office environment.

Pollution Degree 2. Normally only dry non-conductive pollution occurs.
Occasionally a temporary conductivity caused by condensation may occur.
Example: General indoor environment.

Pollution Degree 3: Conductive pollution occurs, or dry, non-conductive pollution
occurs which becomes conductive due to condensation which is expected.
Example: Sheltered outdoor environment.

6000L Series Oscilloscopes Service Guide 17

1 Characteristics and Specifications

Specifications

Please see the InfiniiVision 6000L Series Oscilloscopes Data Sheet for complete,
up-to-date specifications and characteristics.

To download a copy of the data sheet please visit:

www.keysight.com/find/6000.

Or go to the Keysight home page at www.keysight.com and search for 6000L series
oscilloscopes data sheet.

To order a data sheet by phone, please contact your local Keysight office.

Contact Us

To contact Keysight, see: www.keysight.com/find/contactus

18 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

Service Guide

2 Testing Performance

Overview / 20
List of Test Equipment / 21
To construct the test connector (for use with MSO models only) / 22
To test digital channels (MSO models only) / 24
To verify digital channel threshold accuracy (MSO models only) / 25
To verify voltage measurement accuracy / 29
To verify bandwidth / 33
To verify time scale accuracy / 37
To verify horizontal delta t accuracy / 39
To verify trigger sensitivity / 41
Keysight 6000L Series Oscilloscopes Performance Test Record / 46

This chapter explains how to verify correct oscilloscope operation and perform
tests to ensure that the oscilloscope meets the performance specifications.

19

2 Testing Performance

Overview

To completely test and troubleshoot the mixed-signal oscilloscope, you will create
and use a test connector accessory, as described in this chapter.

• The test connector is only required for oscilloscopes that have the MSO option
licensed (enabled).

• The connector is used in the digital channel threshold accuracy test.

• The test connector makes it easy for you to connect the oscilloscope probes to
function generators and measurement equipment with minimum electrical
distortion.

Let the Equipment Warm Up Before Testing

For accurate test results, let the test equipment and the oscilloscope warm up 30
minutes before testing.

Verifying Test Results

During the tests, record the readings in the Performance Test Record on page 46.
To verify whether a test passes, verify that the reading is within the limits in the
Performance Test Record.

If a performance test fails

If a performance test fails, first perform the User Cal procedure

Conventions

The following conventions will be used when referring to oscilloscope models
throughout this chapter.

Table 1 Conventions

Models Referred to as:

DSO6014L 100 MHz Models

DSO6054L 500 MHz Models

DSO6104L 1 GHz Models

20 6000L Series Oscilloscopes Service Guide

Testing Performance 2

List of Test Equipment

Below is a list of test equipment and accessories required to perform the
performance test verification procedures.

Table 2 List of test equipment

Recommended Model/

Equipment Critical Specifications

Tes t conn ector , 8-by- 2* Se e page 22 for instructions on building test connector. n/a

Digital Multimeter 0.1 mV resolution, 0.005% accuracy Keysight 34401A

Power Splitter Outputs differ by 0.15 dB Keysight 11667B

Oscilloscope Calibrator DC offset voltage of -5.5 V to 35.5 V, 0.1 V resolution Fluke 5820A

Signal Generator 25 MHz, 100 MHz, 500 MHz, and 1 GHz sine waves Keysight N5181A, or

Power Meter/Sensor 1 GHz

Oscilloscope Calibrator 25 MHz—500 MHz sine wave, 5 ppm Fluke 5820A

BNC banana cable Keysight 11001-66001

BNC cable (qty 3) Keysight 10503A

Cable Type N (m) 609.6 mm (24 in.) Keysight 11500B

Probe cable* Keysight 01650-61607

Shorting Cap BNC Keysight 1250-0774

Adapter BNC(f) to banana(m) Keysight 1251-2277

Adapter BNC Tee (m) (f) (f) Keysight 1250-0781

Adapter Type N (m) to BNC (m) Keysight 1250-0082

Blocking capacitor Keysight 10240-60001

Adapter (qty 3) N(m) to BNC(f) Keysight 1250-0780

Feedthrough (qty 2) 50

* Required only for testing digital channels of oscilloscopes that have the MSO option.

Some parts and equipment are available at www.keysight.com or www.parts.keysight.com.

±3% accuracy Keysight E4418B/8482A

Ω BNC (f) to BNC (m) Keysight 0960-0301

Part Number

E4400B, or 8648A

or Pomona 3288 with
Pomona 3533

6000L Series Oscilloscopes Service Guide 21

2 Testing Performance

To construct the test connector (for use with MSO models only)

Keysight 6000L Series Oscilloscopes that have digital channels enabled require
the test connector described below. Follow the steps to build the test connector.

Table 3 Materials required to construct the test connectors

Description Recommended Part Qty

BNC (f) Connector Keysight 1250-1032 or

Pomona 4578

Berg Strip, 8-by-2 1

Jumper wire

1 Obtain a BNC connector and an 8-by-2 section of Berg strip.
2 On one side of the Berg strip, solder a jumper wire to all of the pins (shown in

Figure 1 on page 23).

3 On the other side of the Berg strip, solder another jumper wire to all of the pins.
4 Solder the center of the BNC connector to a center pin on one of the rows on

the Berg strip.

5 Solder the ground tab of the BNC connector to a center pin on the other row on

the Berg strip.

1

22 6000L Series Oscilloscopes Service Guide

Figure 1 Constructing the 8-by-2 Connector

Jumper (2)

Signal Lead
(from scope’s MSO cable)

8 x 2 Berg Strip

BNC Panel Mount Connector

Ground Lead
(from scope’s MSO cable)

Testing Performance 2

6000L Series Oscilloscopes Service Guide 23

2 Testing Performance

To test digital channels (MSO models only)

The acquisition system testing provides confidence that the acquisition system is
functioning correctly. It does not, however, check a particular specification.

1 Disconnect all probes from the circuit under test and from any other input

source.

2 Using probe leads and grabbers, connect digital channels D0, D1, D2, and D3

to the Probe Comp signal on the center of the front panel.

3 Press the AutoScale key.

If four square waves appear, the acquisition system is functioning correctly.

If the square waves do not appear, go to the “Troubleshooting” chapter. Then
return here to finish testing the digital channels.

4 Disconnect the digital channels from the calibration point.
5 Use steps 2 and 3 to test the following sets of digital channels. After you test

one set of digital channels, remove them before connecting the next set.

• D4, D5, D6, D7

• D8, D9, D10, D11

• D12, D13, D14, D15

24 6000L Series Oscilloscopes Service Guide

Testing Performance 2

To verify digital channel threshold accuracy (MSO models only)

This test verifies the digital channel threshold accuracy specification of the
Keysight 6000L Series Oscilloscopes.

Threshold accuracy test limits= ±(100 mV + 3% of threshold setting)

When to Test

You should perform this test every 12 months or after 2000 hours of operation,
whichever comes first.

What to Test

Use these instructions to test the threshold settings of digital channels D7-D0.
Then, use the same instructions to test digital channels D15-D8.

Verifying Test Results

After each threshold test, record the voltage reading in the Performance Test
Record on page 46. To verify whether a test passes, verify that the voltage reading
is within the limits in the Performance Test Record.

Table 4 Equipment Required to Test Digital Channel Threshold Accuracy

Equipment Critical Specifications Recommended Model/Part

Digital Multimeter 0.1 mV resolution,

0.005% accuracy

Oscilloscope Calibrator DC offset voltage 6.3 V Fluke 5820A

BNC-Banana Cable Keysight 11001-60001

BNC Tee Keysight 1250-0781

BNC Cable Fluke 50

BNC Test Connector, 8-by-2 User-built (See page 22.)

Probe Cable Keysight 01650-61607

6000L Series Oscilloscopes Service Guide 25

Keysight 34401A

Ω cable, P/N 686318

2 Testing Performance

Test
Connector

BNC-Banana
cable

Oscilloscope
Calibrator

Digital
Multimeter

BNC Tee

Probe
Cables

Channels
8 - 15

Channels
0 - 7

6000L Series Oscilloscope

1 Turn on the test equipment and the oscilloscope. Let them warm up for 30

2 Set up the oscilloscope calibrator.

3 Use the 8-by-2 test connector and the BNC cable assembly to connect digital

minutes before starting the test.

a Set the oscilloscope calibrator to provide a DC offset voltage at the

Channel 1 output.

b Use the multimeter to monitor the oscilloscope calibrator DC output

voltage.

channels D0-D7 to one side of the BNC Tee. Then connect the D0-D7 ground
lead to the ground side of the 8-by-2 connector. See Figure 2.

Figure 2 Setting Up Equipment and Test Connector for the Threshold Test

26 6000L Series Oscilloscopes Service Guide

Testing Performance 2

4 Use a BNC-banana cable to connect the multimeter to the other side of the

BNC Tee.

5 Connect the BNC Tee to the Channel 1 output of the calibrator as shown in

Figure 2.

6 On the oscilloscope, press the D15 Thru D0 key, then press the Thresholds

softkey, then press the D15 Thru D0 softkey repeatedly until the check mark is
next to User.

7 Press the oscilloscope User softkey, then turn the Entry knob ( ) on the front

panel on the oscilloscope to set the threshold test settings as shown in Table 5.

Table 5 Threshold Accuracy Voltage Test Settings

Threshold voltage setting
(in oscilloscope User softkey)

+5.00 V +5.250 V ±1 mV dc Lower limit = +4.750 V

–5.00 V –4.750 V ±1 mV dc Lower limit = –5.250 V

0.00 V +100m V ±1 mV dc Upper limit = +100 mV

8 Do the following steps for each of the threshold voltage levels shown in Table 5.

a Set the threshold voltage shown in the User softkey using the Entry knob on

the oscilloscope.

b Enter the corresponding DC offset voltage on the oscilloscope calibrator

front panel. Then use the multimeter to verify the voltage.

Digital channel activity indicators are displayed on the status line at the top
of the oscilloscope display. The activity indicators for D7-D0 should show all
of the channels at digital high levels.

c Use the knob on the oscilloscope calibrator to decrease the offset voltage, in

increments of 10 mV, until the activity indicators for digital channels D7-D0
are all at digital low levels. Record the oscilloscope calibrator voltage in the
Performance Test Record (see page 46).

d Use the knob on the oscilloscope calibrator to increase the offset voltage, in

increments of 10 mV, until the activity indicators for digital channels D7-D0

DC offset voltage setting
(on oscilloscope calibrator) Limits

Upper limit = +5.250 V

Upper limit = –4.750 V

Lower limit = –100 mV

6000L Series Oscilloscopes Service Guide 27

2 Testing Performance

9 Use the 8-by-2 test connector to connect digital channels D15-D8 to the

10 Repeat this procedure (steps 7 and 8) for digital channels D15-D8 to verify

are all at digital high levels. Record the oscilloscope calibrator voltage in the
Performance Test Record (see page 46).

Before proceeding to the next step, make sure that you have recorded the
oscilloscope calibrator voltage levels for each of the threshold settings shown
in Tab le 5.

output of the oscilloscope calibrator. Then connect the D15-D8 ground lead to
the ground side of the 8-by-2 connector.

threshold accuracy and record the threshold levels in the Performance Test
Record (see page 46).

28 6000L Series Oscilloscopes Service Guide

To verify voltage measurement accuracy

This test verifies the accuracy of the analog channel voltage measurement for
each channel (DC Vertical Gain Accuracy and Dual Cursor Accuracy
specifications). In this test, you will measure the dc voltage output of an
oscilloscope calibrator using dual cursors on the oscilloscope, and compare the
results with the multimeter reading.

Test limits: ±2.0% of full scale ±1 LSB*

• On 500 MHz and 1 GHz models, full scale is defined as 32 mV on the 2 mV/div
range.

• On 100 MHz models full scale is defined as 16 mV on the 1 mV/div range.

• Full scale on all other ranges is defined as 8 divisions times the V/div setting.

*1 LSB = 0.4% of full scale

Table 6 Equipment Required to Verify Voltage Measurement Accuracy

Equipment Critical Specifications Recommended Model/Part

Testing Performance 2

Oscilloscope Calibrator 14 mV to 35 Vdc,

0.1 V resolution

Digital multimeter Better than 0.01% accuracy Keysight 34401A

Cable BNC, Qty 2 Keysight 10503A

Shorting cap BNC Keysight 1250-0774

Adapter BNC (f) to banana (m) Keysight 1251-2277

Adapter BNC tee (m) (f) (f ) Keysight 1250-0781

Blocking capacitor Keysight 10240B

1 Set up the oscilloscope.

a Adjust the channel 1 position knob to place the baseline at 0.5 major division

from the bottom of the display.

b Set the Volts/Div setting to the value in the first line in Table 7.

6000L Series Oscilloscopes Service Guide 29

Fluke 5820A

2 Testing Performance

Table 7 Settings Used to Verify Voltage Measurement Accuracy

Volts/Div Setting Oscilloscope Calibrator

Setting

5 V/Div 35 V 34.04 V to 35.96 V

2 V/Div 14 V 13.616 V to 14.384 V

1 V/Div 7 V 6.808 V to 7.192 V

500 mV/Div 3.5 V 3.404 V to 3.596 V

200 mV/Div 1.4 V 1.3616 V to 1.4384 V

100 mV/Div 700 mV 680.8 mV to 719.2 mV

50 mV/Div 350 mV 340.4 mV to 359.6 mV

20 mV/Div 140 mV 136.16 mV to 143.84 mV

10 mV/Div 70 mV 68.08 mV to 71.92 mV

5 mV/Div 35 mV 34.04 mV to 35.96 mV

2mV/Div1 (for 1 GHz and 500 MHz models)

2mV/Div (for 100 MHz models)

1mV/Div

1

2

Full scale is defined as 32 mV on the 2 mV/div range for 500 MHz and 1 GHz models.

14 mV 13.232 mV to 14.768 mV

14 mV 13.616 mV to 14.384 mV

7 mV 6.616 mV to 7.384 mV

Test Limits

2

Full scale is defined as 16 mV on the 1 mV/div range for 100 MHz models.

Full scale on all other ranges is defined as 8 divisions times the V/div setting.

c Press the Acquire key. Then press the Averaging softkey and set #Avgs to 64.

Wait a few seconds for the measurement to settle.

2 Press the Cursors key, set the Mode softkey to Normal, then press the XY softkey

and select Y. Press the Y1 softkey, then use the Entry knob (labeled on the
front panel) to set the Y1 cursor on the baseline of the signal.

3 Use the BNC tee and cables to connect the oscilloscope calibrator /power

supply to both the oscilloscope and the multimeter (see Figure 3).

30 6000L Series Oscilloscopes Service Guide

Testing Performance 2

Oscilloscope

Oscilloscope
Calibrator

Digital
Multimeter

BNC Tee

BNC (f) to dual
banana

Figure 3 Connect equipment for voltage measurement accuracy test

4 Adjust the output so that the multimeter reading displays the first Volts/div

calibrator setting value in Tab le 7.

Wait a few seconds for the measurement to settle.

5 Press the Y2 softkey, then position the Y2 cursor to the center of the voltage

trace using the Entry knob.

The ΔY value on the lower line of the display should be within the test limits
of Tab le 7. If a result is not within the test limits, go to the “Troubleshooting”
chapter. Then return here.

6000L Series Oscilloscopes Service Guide 31

6 Continue to check the voltage measurement accuracy with the remaining

Volts/div setting values in Table 7 .

2 Testing Performance

To oscilloscope input

BNC shorting
cap

Blocking
Capacitor

7 When you are finished checking all of the voltage values, disconnect the

8 Repeat this procedure for the remaining channels to be tested.

Use a Blocking Capacitor to Reduce Noise

On the more sensitive ranges, such as 2 mV/div and 5 mV/div, noise may be a factor. To eliminate the
noise, add a BNC Tee, blocking capacitor, and BNC shorting cap at the oscilloscope channel input to
shunt the noise to ground. See Figure 4.

oscilloscope calibrator from the oscilloscope.

Figure 4 Using a Blocking Capacitor to Reduce Noise

32 6000L Series Oscilloscopes Service Guide

To verify bandwidth

This test checks the bandwidth of the oscilloscope. In this test you will use a
signal generator and a power meter.

1GHz Models

Test limits at 2 mV/div to 5 V/div

• All channels (-3 dB)

• dc to 1 GHz

500 MHz Models

Test limits at 2 mV/div to 5 V/div

• All channels (-3 dB)

• dc to 500 MHz

100 MHz Models

Testing Performance 2

Test limits at 1 mV/div to 5 V/div

• All channels (-3 dB)

• dc to 100 MHz

Table 8 Equipment Required to Verify Bandwidth

Equipment Critical Specifications Recommended Model/Part

Signal Generator 100 kHz - 1 GHz at 200 mVrms Keysight N5181A, or E4400B,

or 8648A

Power Meter/Sensor 1 MHz - 1 GHz ±3% accuracy Keysight E4418B/8482A

Power Splitter outputs differ by < 0.15 dB Keysight 11667A

Cable Type N (m) 24 inch Keysight 11500B

Adapter Type N (m) to BNC (m) Keysight 1250-0082
Feedthrough 50Ω BNC (f) to BNC (m) Keysight 0960-0301

6000L Series Oscilloscopes Service Guide 33

2 Testing Performance

Oscilloscope

Signal
Generator

Power Meter

Power Splitter

Power Sensor

N to BNC adapter

N Cable

50Ω Feedthrough*

* 100 MHz models only.

1 Connect the equipment (see Figure 5).

a Use the N cable to connect the signal generator to the input of the power

splitter input.

b Connect the power sensor to one output of the power splitter.
c For 500 MHz and 1 GHz oscilloscope models use an N-to-BNC adapter to

connect the other splitter output to the channel 1 input.

d For 100 MHz oscilloscopes, use an N-to-BNC adapter and 50Ω feedthrough

termination to connect the other splitter output to the channel 1 input on
the oscilloscope.

Figure 5 Connect equipment for bandwidth test

2 Set up the power meter.

34 6000L Series Oscilloscopes Service Guide

Testing Performance 2

Vin

1MHz

Pmeas

1MHz

50Ω×=

Set the power meter to display measurements in units of watts.

3 Set up the oscilloscope.

a Press the Save/Recall key, then press the Default Setup softkey.
b Press the Acquire key, then press the Realtime softkey to unselect Realtime.
c Set channel 1 Coupling to DC.
d On 500 MHz and 1 GHz models only, set channel 1 Imped to 50 Ohm.
e Set the time base to 500 ns/div.
f Set the Volts/Div for channel 1 to 200 mV/div.
g Press the Acquire key, then press the Averaging softkey.
h Turn the Entry knob to set # Avgs to 8 averages.

4 Set the signal generator for 1 MHz and six divisions of amplitude.

The signal on the oscilloscope screen should be about five cycles at six
divisions amplitude.

5 Set up the Amplitude measurement

a Press the Quick Meas key.
b Press the Clear Meas softkey.
c Press the Select: softkey and use the Entry knob to select Std Deviation within

the select menu.

d Press the Measure Std Dev softkey.

6 Note the oscilloscope Std Dev(1) reading at the bottom of the screen. (This is

the RMS value with any dc offset removed.)

7 Set the power meter Cal Factor % to the 1 MHz value on the calibration chart

on the power sensor.

8 Note the reading on the power meter and covert to Vrms using the expression:

For example, if the power meter reading is 892 uW, then Vin

1/2

50Ω)

9 Change the signal generator output frequency according to the maximum

frequency for the oscilloscope using the following:

• 1GHz Models: 1GHz

• 500 MHz Models: 500 MHz

6000L Series Oscilloscopes Service Guide 35

= 211.2 mV

rms

.

= (892*10-6 *

1MHz

2 Testing Performance

Vin

maxfreq

Pmeas

maxfreq

50Ω×=

response(dB) = 20 log

10













freqmax freqmax

Vin / Vout

Vin / Vout

response(dB) = 20 log

10













mV 185.3 / mV 161.6

= -1.16 dB

Example If:

• 100 MHz Models: 100 MHz

10 Referencing the frequency from step 9, set the power meter Cal Factor % to the

frequency value on the calibration chart on the power sensor.

11 Set the oscilloscope sweep speed according to the following:

• 1 GHz Models: 500 ps/div

• 500 MHz Models: 1 ns/div

• 100 MHz Models: 5 ns/div

12 Note the oscilloscope Std Dev(1) reading at the bottom of the screen.
13 Note the reading on the power meter and covert to Vrms using the expression:

14 Calculate the response using the expression:

MHz1MHz1

Pmeas
Std Dev(n)
Pmeas
Std Dev(n)

Then after converting the values from the power meter to Vrms:

1_MHz

1MHz

max_freq

max freq

= 892 uW

= 210.4 mV

= 687 uW

= 161.6 mV

36 6000L Series Oscilloscopes Service Guide

mV211.2mV/ 210.4

15 The result from step 14 should be within -3.0 dB. Record the result in the

Performance Test Record (see page 46).

16 Move the power splitter from the channel 1 to the channel 2 input.
17 Turn off the current channel and turn on the next channel using the channel

keys.

18 Repeat steps 3 through 17 for the remaining channels, setting the parameters

of the channel being tested where appropriate.

To verify time scale accuracy

Date Code:
0747
07 = Year
47 = Week

Time Scale Accuracy is a warranted specification for 6000L Series oscilloscopes
manufactured after January 1, 2008.

If your oscilloscope’s serial tag has old-style (linear) barcodes instead of the 3-D
barcodes shown above, or if the date indicated on the serial tag is older than
January 1, 2008, then disregard this test.

This test verifies the accuracy of the time scale. In this test you will measure the
absolute error of the timebase oscillator and compare the results to the
specification.

Testing Performance 2

Table 9 Equipment Required to Verify Time Scale Accuracy

Equipment Critical Specifications Recommended Model/Part

Signal Generator 100 kHz - 1 GHz, 0.01 Hz frequency

resolution,
jitter: < 2ps

Cable BNC, 3 feet Keysight 10503A

1 Set up the signal generator.

a Set the output to 10 MHz, approximately 1 V

2 Connect the output of the signal generator to oscilloscope channel 1 using the

BNC cable.

6000L Series Oscilloscopes Service Guide 37

Keysight N5181A, or E4400B,
or 8648A

sine wave.

pp

2 Testing Performance

Date Code:
0747
07 = Year
47 = Week

3 Set up the oscilloscope:

a Press AutoScale.
b Set the oscilloscope Channel 1 vertical sensitivity to 200 mv/div.
c Set the oscilloscope horizontal sweep speed control to 5 ns/div.
d Adjust the intensity to get a sharp, clear trace.
e Adjust the oscilloscope’s trigger level so that the rising edge of the

waveform at the center of the screen is located where the center horizontal
and vertical grid lines cross (center screen).

f Ensure the horizontal position control is set to 0.0 seconds.

4 Make the measurement.

a Set oscilloscope horizontal sweep speed control to 1 ms/div.
b Set horizontal position control to +1 ms (rotate control CCW).
c Set the oscilloscope horizontal sweep speed control to 5 ns/div.
d Record the number of nanoseconds from where the rising edge crosses the

center horizontal grid line to the center vertical grid line. The number of
nanoseconds is equivalent to the time scale error in ppm.

e Use the date code on the oscilloscope’s serial tag to calculate the number of

years since manufacture. Include any fractional portion of a year.

f Calculate the test limits using the following formula:

TSA Limit: ± (15 + 2 * YrsSinceMfr) ppm

g Record the result and compare it to the limits in the Performance Test

Record (see page 46).

38 6000L Series Oscilloscopes Service Guide

To verify horizontal delta t accuracy

The following test is optional because horizontal Δt accuracy is a characteristic,
not a specification.

This test verifies the horizontal Δt accuracy. In this test, you will use the
oscilloscope to measure the output of a time mark generator.

Test limits: ±0.0015% of reading ±0.1% of full scale ±20 ps (same channel)

Table 10 Equipment Required to Verify Horizontal Δt Accuracy

Equipment Critical Specifications Recommended Model/Part

Oscilloscope Calibrator Stability 5 ppm after 1/2 hour Fluke 5820A

Cable BNC, 3 feet Keysight 10503A
Feedthrough 50Ω BNC (f) to BNC (m) Keysight 0960-0301

1 Connect the equipment:

a For 500 MHz and 1 GHz oscilloscope models, connect the calibrator output

to the oscilloscope channel 1 input.

b For 100 MHz oscilloscopes, use a 50Ω feedthrough termination to connect

the calibrator output to the oscilloscope channel 1 input.

2 Set up the signal source.

a Select Marker on the oscilloscope calibrator.
b Set the calibrator for 100 μs markers (period = 100 μs).

3 Set up the oscilloscope.

a Set channel 1 Coupling to DC.
b On 1 GHz and 500 MHz models only, set channel 1 Imped to 50 Ohm.
c Press the Display key, then set the Vectors softkey to off.
d Press the AutoScale key.
e Set the time base to 20 μs/div.
f Press the Main/Delayed (or Zoom) key, then set the Time Ref softkey to Left.
g Adjust the Trigger Level knob to obtain a stable display.

Testing Performance 2

6000L Series Oscilloscopes Service Guide 39

2 Testing Performance

4 Press the Quick Meas softkey, set the Source softkey to 1, then press Select and

choose Period. Press the Measure softkey and measure the following:
Period 100 μs — The test limits are 99.8 μs to 100.2 μs.

If the measurements are not within the test limits, go to the “Troubleshooting”
chapter. Then return here.

5 Change the calibrator to 100 ns markers. Change the time base to 20 ns/div.

Adjust the trigger level to obtain a stable display.

6 Measure the following. If the measurements are not within the test limits, go to

the “Troubleshooting” chapter. Then return here.

Period 100 ns— The test limits are 99.8 ns to 100.2 ns.

7 Change the time base and calibrator markers as follows:

a On 500 MHz and 1 GHz models, change time base to 2 ns/div and the

calibrator to 5 ns markers

b On 100 MHz models, change time base to 5 ns/div and the calibrator to

10 ns markers

8 Make the following measurements. If the measurements are not within the test

limits, go to the “Troubleshooting” chapter. Then return here.
a For 500 MHz, and 1 GHz models, period 5 ns — the test limits are 4.96 ns to

5.04 ns.

b For 100 MHz models, period 10 ns — the test limits are 9.93 ns to 10.07 ns.

40 6000L Series Oscilloscopes Service Guide

To verify trigger sensitivity

This test verifies the trigger sensitivity. In this test, you will apply a sine wave to
the oscilloscope at the upper bandwidth limit. You will then decrease the
amplitude of the signal to the specified levels, and check to see if the oscilloscope
is still triggered.

The internal trigger sensitivity test is mandatory because it is a specification. The
external trigger test is optional because it is a characteristic, not a specification.

Test limits for:

• Internal trigger:

• < 10 mV/div: greater of 1 div or 5 mV

>=10 mV/div: 0.6 div

• External trigger:

1GHz and 500MHz models:
(DSO6104L/6054L)
DC to 500 MHz: < 500 mV

100 MHz models:
(DSO6014L)
DC to 100 MHz: < 500 mV

pp

pp

Testing Performance 2

pp

Table 11 Equipment Required to Verify Trigger Sensitivity

Equipment Critical Specifications Recommended Model/Part

Signal Generator 25-MHz, 100-MHz, 500-MHz, and

1GHz sine waves

Power splitter Outputs differ < 0.15 dB Keysight 11667A

Cable BNC, Qty 3 Keysight 10503A

Adapter N (m) to BNC (f), Qty 3 Keysight 1250-0780
Feedthrough 50Ω BNC (f) to BNC (m) Qty 2 Keysight 0960-0301

6000L Series Oscilloscopes Service Guide 41

Keysight N5181A, or E4400B, or
8648A

2 Testing Performance

Signal
Generator

N to BNC adapter

N Cable

50Ω Feedthrough*

* 100 MHz models only.

Oscilloscope

Test Internal Trigger Sensitivity

1 Connect the equipment (see Figure 6).

a For 500 MHz and 1 GHz models, connect the signal generator output to the

oscilloscope channel 1 input.

b For 100 MHz models, use a 50Ω feedthrough termination to connect the

signal generator output to the oscilloscope channel 1 input.

Figure 6 Connect equipment for internal trigger sensitivity test

42 6000L Series Oscilloscopes Service Guide

Testing Performance 2

2 Verify the trigger sensitivity at maximum bandwidth.

1 GHz models: 1 GHz
500 MHz models: 500 MHz
100 MHz models: 100 MHz

a Press the Save/Recall key, then press the Default Setup softkey.
b On 500 MHz and 1 GHz models, set channel 1 Imped to 50 Ohm.
c Set the output frequency of the signal generator to the maximum bandwidth

of the oscilloscope and set the amplitude to about 10 mV

d Press the AutoScale key.
e Set the time base to 10 ns/div.
f Set channel 1 to 5 mV/div.
g Decrease the amplitude from the signal generator until 1 vertical division of

the signal is displayed.

The trigger is stable when the displayed waveform is stable. If the trigger is
not stable, try adjusting the trigger level. If adjusting the trigger level makes
the trigger stable, the test still passes. If adjusting the trigger does not help,
see the “Troubleshooting” chapter. Then return here.

h Record the result as Pass or Fail in the Performance Test Record (see

page 46).

3 Repeat this procedure for the remaining oscilloscope channels.

pp

.

Test External Trigger Sensitivity

The following test is optional because External Trigger Sensitivity is a
characteristic, not a specification.

Verify the external trigger sensitivity at these settings:

• 1 GHz and 500 MHz bandwidth models:

500 MHz, 500 mV

• 100 MHz bandwidth models:

100 MHz, 500 mV

1 Connect the equipment (see Figure 7).

a Use the N cable to connect the signal generator to the power splitter input.
b Connect one output of the power splitter to the Aux Trig input through a 50Ω

feedthrough termination.

c Connect the power sensor to the other output of the power splitter.

6000L Series Oscilloscopes Service Guide 43

pp

pp

2 Testing Performance

Oscilloscope

Signal
Generator

Power Meter

Power Splitter

Power Sensor

N to BNC adapter

N Cable

50Ω Feedthrough*

* Required for all models.

44 6000L Series Oscilloscopes Service Guide

Figure 7 Connect equipment for external trigger sensitivity test

2 Set up the oscilloscope.

a Press the Save/Recall key, then press the Default Setup softkey.

3 Change the signal generator output frequency as follows:

• For 500 MHz and 1 GHz models, set the signal generator output frequency

to 500 MHz

• For 100 MHz models, set the signal generator output frequency to 100 MHz

Testing Performance 2

4 Set the power meter Cal Factor % to the appropriate value (500 MHz or

100 MHz) on the calibration chart on the power sensor. If necessary, do a linear
interpolation if a 500 MHz or 100 MHz factor is not included in the power
meter’s calibration chart.

5 Adjust the signal generator output for reading on the power meter of 625μW.

(500mV
Power = Vin

6 Press the Trigger Edge key, then press the Source softkey to set the trigger

source to External.

7 Check for stable triggering and adjust the trigger level if necessary. Triggering

is indicated by the Trig’d indicator at the top of the display. When it is flashing,
the oscilloscope is not triggered. When it is not flashing, the oscilloscope is
triggered.

8 Record the results as Pass or Fail in the Performance Test Record (see

page 46).

If the test fails, see the “Troubleshooting” chapter. Then return here.

= 176.78mV rms,

pp

2

/50Ω = 176.78 mV2/50Ω = 625μW.)

6000L Series Oscilloscopes Service Guide 45

2 Testing Performance

Keysight 6000L Series Oscilloscopes Performance Test Record

Serial No. ______________________________________ Test by _____________________________
Test Interval ____________________________________ Work Order No. ______________________
Recommended Next Testing ________________________ Temperature ____________

Threshold Specification Limits Ch D7-D0 Ch D15-D8
Accuracy Test 5 V - 250 mV 4.750 V ________ ________
(100 mV + 3% of

threshold setting)

Voltage Measurement Accuracy
Range Power Supply Setting Test Limits Channel 1 Channel 2 Channel 3* Channel 4*

5 V/Div 35 V 34.04 V to 35.96 V ________ ________ ________ ________
2 V/Div 14 V 13.616 V to 14.384 V ________ ________ ________ ________
1 V/Div 7 V 6.808 V to 7.192 V ________ ________ ________ ________
500 mV/Div 3.5 V 3.404 V to 3.596 V ________ ________ ________ ________
200 mV/Div 1.4 V 1.3616 V to 1.4384 V ________ ________ ________ ________
100 mV/Div 700 mV 680.8 mV to 719.2 mV ________ ________ ________ ________
50 mV/Div 350 mV 340.4 mV to 359.6 mV ________ ________ ________ ________
20 mV/Div 140 mV 136.16 mV to 143.84 mV ________ ________ ________ ________
10 mV/Div 70 mV 68.08 mV to 71.92 mV ________ ________ ________ ________
5 mV/Div 35 mV 34.04 mV to 35.96 mV ________ ________ ________ ________
2mV/Div

2mV/Div

1mV/Div

(500 MHz and 1 GHz models)

(100 MHz models)

(MSO/DSO6012A)

5 V + 250 mV 5.250 V ________ ________

-5 V - 250 mV -5.250 V ________ ________

-5 V + 250 mV -4.750 V ________ ________
0 V - 100 mV -100 mV ________ ________
0 V + 100 mV 100 mV ________ ________

14 mV 13.232 mV to 14.768 mV ________ ________ ________ ________

14 mV 13.616 mV to 14.384 mV ________ ________ ________ ________

7 mV 6.616 mV to 7.384 mV ________ ________ ________ ________

Bandwidth Model Test Limits Channel 1 Channel 2 Channel 3* Channel 4*

Time Scale
Accuracy

610x -3 dB at 1 GHz ________ ________ ________ ________
605x -3 dB at 500 MHz ________ ________ ________ ________
601x -3 dB at 100 MHz ________ ________ ________ ________

Limits

Time Scale Accuracy is a warranted specification
for 6000L Series instruments manufactured after
January 1, 2008.

TSA Limit: ± (15 + 2 * YrsSinceMfr) ppm ___________ ___________ ___________

Calculated
TSA Limit
(ppm)

Measured
time scale
error (ppm)

Pass/Fail

46 6000L Series Oscilloscopes Service Guide

Testing Performance 2

Horizontal Δt Accuracy

Period 100 μs 99.8 μs to 100.2 μs ________
Period 100 ns 99.8 ns to 100.2 ns ________
Period 10 ns
Period 5 ns

1

100 MHz models

2

500 MHz and 1 GHz models

Trigger Sensitivity Test Limits Channel 1 Channel 2 Channel 3* Channel 4*

Trigger Sensitivity Test Limits Channel 1 Channel 2 Channel 3* Channel 4*

* Where applicable

Generator Setting Test Limits Results

1

2

Internal trigger

1 GHz models 0.6 division at 1 GHz ________ ________ ________ _______
500 MHz models 0.6 division at 500 MHz ________ ________ ________ _______
100 MHz models 0.6 division at 100 MHz ________ ________ ________ _______

External trigger (6014, 6054, 6104)
6104, 6054 500 mV at 500 MHz ________ ________ ________ ________
6014 500 mV at 100 MHz ________ ________ ________ ________

9.93 ns to 10.07 ns ________

4.96 ns to 5.04 ns ________

1 division at 25 MHz ________ ________ ________ ________

6000L Series Oscilloscopes Service Guide 47

2 Testing Performance

48 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

WARNING

CAUTION

Service Guide

3 Calibrating and Adjusting

This chapter explains how to adjust the oscilloscope for optimum operating
performance. You should perform self-calibration according to the following
recommendations:

• Every 12 months or after 2000 hours of operation

• If the ambient temperature is >10 °C from the calibration temperature

• If you want to maximize the measurement accuracy

The amount of use, environmental conditions, and experience with other
instruments help determine if you need shorter adjustment intervals.

Let the Equipment Warm Up Before Adjusting

Before you start the adjustments, let the oscilloscope and test equipment warm
up for at least 30 minutes.

Read All Cautions and Warnings

Read the following cautions and warning before making adjustments or
performing self-calibration.

HAZARDOUS VOLTAGES!

Read the safety notice at the front of this book before proceeding.
Maintenance is performed with power supplied to the oscilloscope and with the protective covers
removed. Only trained service personnel who are aware of the hazards involved should perform the
maintenance. Whenever possible, perform the procedures with the power cord removed from the
oscilloscope.

REMOVE POWER TO AVOID DAMAGE!

Do not disconnect any cables or remove any assemblies with power applied to the oscilloscope.
Otherwise, damage to the oscilloscope can occur.

49

3 Calibrating and Adjusting

CAUTION

CAUTION

USE EXTERNAL FAN TO REDUCE TEMPERATURE!

When you must operate the oscilloscope with its cover and main shield removed, use an external fan to
provide continuous air flow over the samplers (the ICs with heat sinks on them). Air flow over the
samplers is reduced when the cover and main shield is removed, which leads to higher than normal
operating temperatures. Have the fan blow air across the system board where the heat sinks are located.
If the cover is removed but the main shield remains installed and the bottom holes are not blocked, the
instrument will cool properly.

AVOID DAMAGE TO ELECTRONIC COMPONENTS!

Electrostatic discharge (ESD) can damage electronic components. When you use any of the procedures
in this chapter, use proper ESD precautions. As a minimum, place the oscilloscope on a properly
grounded ESD mat and wear a properly grounded ESD strap.

50 6000L Series Oscilloscopes Service Guide

User Calibration

Perform user-calibration:

• Each year or after 2000 hours of operation.

• If the ambient temperature is >10° C from the calibration temperature.

• If you want to maximize the measurement accuracy.

The amount of use, environmental conditions, and experience with other
instruments help determine if you need shorter User Cal intervals.

User Cal performs an internal self-alignment routine to optimize the signal path in
the oscilloscope. The routine uses internally generated signals to optimize circuits
that affect channel sensitivity, offset, and trigger parameters. Disconnect all
inputs and allow the oscilloscope to warm up before performing this procedure.

Performing User Cal will invalidate your Certificate of Calibration. If NIST (National
Institute of Standards and Technology) traceability is required perform the
procedures in Chapter 2 in this book using traceable sources.

Calibrating and Adjusting 3

To perform User C al

1 Set the rear-panel CALIBRATION switch to UNPROTECTED.
2 Connect short (12 inch maximum) equal length cables to each analog channel’s

BNC connector on the front of the oscilloscope. You will need four equal-length
cables for a 4-channel oscilloscope.

6000L Series Oscilloscopes Service Guide 51

3 Calibrating and Adjusting

Longer cable
to TRIG OUT

To Channel 3

To Channel 2

To Channel 1

To Channel 4

Use 50Ω RG58AU or equivalent BNC cables when performing User Cal.
a Connect BNC tees to the equal-length cables as shown below. Then connect

a BNC(f)-to-BNC(f) (barrel connector) to the tee as shown below.

Figure 8 User Calibration cable for 4-channel oscilloscope

3 Connect a BNC cable (40 inches maximum) from the TRIG OUT connector on

the rear panel to the BNC barrel connector.

4 Press the Utility key, then press the Service softkey.

52 6000L Series Oscilloscopes Service Guide

5 Begin the Self Cal by pressing the Start User Cal softkey.
6 When the User Cal is completed, set the rear-panel CALIBRATION switch to

PROTECTED.

User Cal Status

Pressing the User Cal Status softkey displays the following summary results of the
previous User Cal, and the status of probe calibrations for probes that can be
calibrated. Note that AutoProbes do not need to be calibrated, but InfiniiMax can
be calibrated.

Results:
User Cal date:
Change in temperature since last User Cal:
Failure:
Comments:
Probe Cal Status:

Calibrating and Adjusting 3

6000L Series Oscilloscopes Service Guide 53

3 Calibrating and Adjusting

54 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

Service Guide

4 Troubleshooting

Solving General Problems with the Oscilloscope / 56
Troubleshooting the Oscilloscope / 59

This chapter begins with suggestions for solving general problems that you may
encounter with the oscilloscope. It tells you what to do in these cases:

• If there is no trace display

• If the trace display is unusual or unexpected

• If you cannot see a channel

• If you cannot get any response from the oscilloscope

Procedures for troubleshooting the oscilloscope follow the problem solving
suggestions. The troubleshooting section shows you how to:

• Check out the oscilloscope

• Check power supply

• Check the system board

• Check the display

• Check the fan

• Run internal self-tests

• Verify default setup

Read All Cautions and Warnings

Before you begin any troubleshooting, read all Warning and Cautions in the “Troubleshooting” section.

55

4 Troubleshooting

Solving General Problems with the Oscilloscope

This section describes how to solve general problems that you may encounter
while using the Keysight 6000L Series Oscilloscopes to make measurements.

After troubleshooting the oscilloscope, if you need to replace parts, refer to the
“Replaceable Parts” chapter.

On 6000L Series oscilloscopes, connect an XGA display to the display port on the
rear panel before you begin troubleshooting. Then connect the oscilloscope to the
network, establish communication, and use the Remote Front Panel feature
described in the 6000L Series Oscilloscopes User’s Guide to control the
oscilloscope. If you do not have the user’s guide, you can download it from
www.keysight.com/find/6000.

If there is no display

✔ Check that the power cord is firmly seated in the oscilloscope power

receptacle.

✔ Check that the power source is live.

✔ Check that the front-panel power switch is on.

✔ If there is still no display, go to the troubleshooting procedures in this chapter.

If there is no trace display

✔ Check that the INTENSITY knob on the front panel is adjusted correctly.

✔ Recall the default setup by pressing Save/Recall then Default Setup. This will

ensure that the trigger mode is Auto.

✔ Check that the probe clips are securely connected to points in the circuit under

test, and that the ground is connected.

✔ Check that the circuit under test is powered on.

✔ Press the AutoScale key.

✔ Obtain service from Keysight Technologies, if necessary.

56 6000L Series Oscilloscopes Service Guide

Troubleshooting 4

If the trace display is unusual or unexpected

✔ Check that the horizontal sweep speed control setting is correct for the

expected frequency range of the input signals.

✔ The sampling speed of the oscilloscope depends on the time/division setting. It

may be that when time/division is set to slower speeds, the oscilloscope is
sampling too slowly to capture all of the transitions on the waveform. Use peak
detect mode.

✔ Check that all oscilloscope probes are connected to the correct signals in the

circuit under test.

✔ Ensure that the probe’s ground lead is securely connected to a ground point in

the circuit under test. For high-speed measurements, each probe’s individual
ground lead should also be connected to a ground point closest to the signal
point in the circuit under test.

✔ Check that the trigger setup is correct.

✔ A correct trigger setup is the most important factor in helping you capture the

data you desire. See the User’s Guide for information about triggering.

✔ Check that infinite persistence in the Display menu is turned off, then press the

Clear Display softkey.

✔ Press the AutoScale key.

If you cannot see a channel

✔ Recall the default setup by pressing Save/Recall then Default Setup. This will

ensure that the trigger mode is Auto.

✔ Check that the oscilloscope probe’s BNC connector is securely attached to the

oscilloscope’s input connector.

✔ Check that the probe clips are securely connected to points in the circuit under

test.

✔ Check that the circuit under test is powered on.

You may have pressed the AutoScale key before an input signal was available.

Performing the checks listed here ensures that the signals from the circuit
under test will be seen by the oscilloscope. Perform the remaining checks in
this topic to make sure the oscilloscope channels are on, and to obtain an
automatic setup.

6000L Series Oscilloscopes Service Guide 57

4 Troubleshooting

✔ Check that the desired oscilloscope channels are turned on.

a Switch on the analog channel by selecting Analog from the menu bar of the

Remote Front Panel (6000L Series models).

b Switch on the digital channels by selecting Digital from the menu bar (6000L

Series models with the MSO option). Ensure that the desired channels are
turned on.

✔ Press the AutoScale key to automatically set up all channels.

58 6000L Series Oscilloscopes Service Guide

Troubleshooting the Oscilloscope

WARNING

WARNING

CAUTION

CAUTION

The service policy for the Keysight 6000L Series Oscilloscopes is assembly level
replacement. If you need parts or assistance from Keysight Technologies to repair
your instrument, go to www.keysight.com and locate the service facility for your
area.

HAZARDOUS VOLTAGES EXIST — REMOVE POWER FIRST !

The procedures described in this section are performed with power supplied to the oscilloscope and
with the protective covers removed. Only trained service personnel who are aware of the hazards
involved should perform the procedures. Whenever possible, perform the procedures with the power
cord removed from the oscilloscope. Read the safety notice at the back of this book before proceeding.

HAZARDOUS VOLTAGES EXIST — HIGH VOLTAGE IS PRESENT ON DSO6000L SERIES POWER SUPPLY
HEAT SINKS !

The power supply heat sinks of the 6000L Series oscilloscopes are at a high potential. This presents an
electric shock hazard. Protect yourself from electric shock by keeping this area covered or by not coming
in contact with the heat sinks when the power cord is attached to the oscilloscope!

Troubleshooting 4

REMOVE POWER TO AVOID DAMAGE !

Do not disconnect any cables or remove any assemblies while power is applied to the oscilloscope, or
damage to the oscilloscope can occur.

AVOID ESD DAMAGE TO COMPONENTS !

ELECTROSTATIC DISCHARGE (ESD) can damage electronic components. Use proper ESD precautions
when doing any of the procedures in this chapter. As a minimum, place the oscilloscope on a properly
grounded ESD mat and wear a properly grounded ESD strap.

Equipment required for troubleshooting

The equipment listed in this table is required to troubleshoot the oscilloscope.

6000L Series Oscilloscopes Service Guide 59

4 Troubleshooting

CAUTION

WARNING

CAUTION

Table 12 Equipment Required to Troubleshoot the Oscilloscope

Equipment Critical Specifications Recommended Model/Part

Digital multimeter Accuracy ±0.05,% 1 mV resolution Keysight 34401A
Oscilloscope Capable of measuring ≥ 500 MHz signal. 1

MΩ input impedance.

Keysight
DSO6102A, MSO6102A,
DSO6102A, or MSO6104A

To check out the oscilloscope

1 Disconnect any external cables from the front panel.
2 Disconnect the power cord, then remove the cabinet following the instructions

on page 73 for Keysight 6000L Series models.

USE AN EXTERNAL FAN TO AVOID OVERHEATING COMPONENTS !

When you remove the oscilloscope cover and main shield, use an external fan to provide continuous air
flow over the heat sinks. Air flow over the heat sinks is reduced when the cover and main shield are
removed, which leads to higher than normal operating temperatures. Have the fan blow air across the
system board where the heat sinks are located. Otherwise, damage to the components can occur.

HAZARDOUS VOLTAGES EXIST — HIGH VOLTAGE IS PRESENT ON DSO6000L SERIES POWER SUPPLY
HEAT SINKS !

The power supply heat sinks of the 6000L Series oscilloscopes are at a high potential. This presents an
electric shock hazard. Protect yourself from electric shock by keeping this area covered or by not coming
in contact with the heat sinks when the power cord is attached to the oscilloscope!

60 6000L Series Oscilloscopes Service Guide

3 Connect the power cord to the rear of the oscilloscope, then to a suitable ac

voltage source.

The oscilloscope power supply automatically adjusts for input line voltages in
the range of 100 to 240 VAC. Ensure that you have the correct line cord. The
power cord provided is matched to the country of origin.

T

Use only the power cord that came with the oscilloscope

The power cord provided is matched to the country of origin of the order.

Troubleshooting 4

WARNING

LAN Status

Indicator

Power

Switch

Power

Indicator

Reset

Switch

Always use a grounded power cord. Do not defeat the power cord ground.

• On 6000L Series models, press the power switch.

The Power indicator LED is green. The LAN indicator LED is bi-color (green
and/or red).

• Shortly after pressing the power switch, the power indicator and LAN

indicator will illuminate.

• Both will extinguish.

• Both will illuminate again. If a LAN is connected, the LAN indicator will

illuminate red. It will turn green when the LAN is connected as it is
configured. The amount of time it takes the indicator to turn green depends
on the network and the oscilloscope’s LAN configuration setup.

6000L Series Oscilloscopes Service Guide 61

Figure 9 6000L Series LED indicators

4 If the lights illuminate, then the power supply is probably working correctly.
5 Proceed to “To verify basic oscilloscope operation" on page 62.

4 Troubleshooting

To verify basic oscilloscope operation

For 6000L Series oscilloscopes, connect the oscilloscope to your network or
establish a point-to-point connection, and use the Remote Front Panel feature
described in the 6000L Series Oscilloscopes User’s Guide to control the
oscilloscope. If you do not have the user’s guide, you can download it from
www.keysight.com/find/6000.

1 Press the Save/Recall key on the front panel, then press the Default Setup

softkey under the display. The oscilloscope is now configured to its default
settings.

2 Connect an oscilloscope probe from channel 1 to the Probe Comp signal

terminal on the front panel.

3 Connect the probe’s ground lead to the ground terminal that is next to the

Probe Comp terminal.

4 Press AutoScale.
5 You should see a waveform on the oscilloscope’s display similar to this:

If you see the waveform, but the square wave is not shaped correctly as shown
above, perform the procedure “To compensate the analog probes" on page 63.

If you do not see the waveform, ensure your power source is adequate, the
oscilloscope is properly powered-on, and the probe is connected securely to
the front-panel analog channel input BNC and to the Probe Comp terminal.

62 6000L Series Oscilloscopes Service Guide

6 If you still do not see the waveform, use the troubleshooting flowchart in this

comp.cdr

Perfectly compensated

Over compensated

Under compensated

chapter to isolate the problem.

To compensate the analog probes

You should compensate your analog probes to match their characteristics to the
oscilloscope’s channels. A poorly compensated probe can introduce measurement
errors.

1 Perform the procedure “To verify basic oscilloscope operation" on page 62
2 Use a nonmetallic tool to adjust the trimmer capacitor on the probe for the

flattest pulse possible. The trimmer capacitor is located on the probe BNC
connector.

Troubleshooting 4

Figure 10 Example pulses

3 Connect probes to all other analog channels (channels 2, 3, and 4 of a

4-channel oscilloscope). Repeat the procedure for each channel. This matches
each probe to each channel.

The process of compensating the probes serves as a basic test to verify that the
oscilloscope is functional.

6000L Series Oscilloscopes Service Guide 63

4 Troubleshooting

Start

Test Power Supply

Okay?

Test System

Board

Okay?

Test Display

Okay?

End

Replace Power

Supply

Replace System

Board

Replace Display

Yes

Yes

Yes

No

No

No

Troubleshooting Flowchart

The following flowchart describes how to troubleshoot 6000L Series models.

64 6000L Series Oscilloscopes Service Guide

To check the 6000L Series oscilloscope power supply

WARNING

CAUTION

NOTE

HAZARDOUS VOLTAGES EXIST — HIGH VOLTAGE IS PRESENT ON DSO6000L SERIES POWER SUPPLY
HEAT SINKS !

The power supply heat sinks of the 6000L Series oscilloscopes are at a high potential. This presents an
electric shock hazard. Protect yourself from electric shock by keeping this area covered or by not coming
in contact with the heat sinks when the power cord is attached to the oscilloscope!

USE AN EXTERNAL FAN TO AVOID OVERHEATING COMPONENTS !

When you remove the oscilloscope cover and main shield, use an external fan to provide continuous air
flow over the heat sinks. Air flow over the heat sinks is reduced when the cover and main shield are
removed, which leads to higher than normal operating temperatures. Have the fan blow air across the
system board where the heat sinks are located. Otherwise, damage to the components can occur.

If the power supply fuse is blown, the power supply is defective, and you must replace it. See
the “Replaceable Parts” chapter for information about removing the power supply.

Troubleshooting 4

1 Disconnect the power cord from the oscilloscope. Then remove the oscilloscope

cover.

2 Connect the negative lead of the multimeter to a ground point on the

oscilloscope.

3 Connect the power cord and turn on the oscilloscope.
4 Measure the power supply voltage at J3200, pin 9 on the system board. See

Figure 11 on page 66. The voltage should be 15 V ±10%. If the voltage is

correct, the power supply is working correctly.

6000L Series Oscilloscopes Service Guide 65

4 Troubleshooting

Pin 1

Pin 9

J3200

Figure 11 System Board Test Points

5 If the voltage is not correct:

a Disconnect the power cord.
b Remove the fan. See “To remove the fan" on page 81.
c Disconnect plug J3 from the power supply and from the system board.
d Perform a continuity check on the “DC cable” (item W1 on page 93). If the

cable is shorted or open, replace it. If not, continue to the next step.

e Reconnect the “DC cable” to the power supply, but not to the system board.

66 6000L Series Oscilloscopes Service Guide

WARNING

HAZARDOUS VOLTAGES EXIST — HIGH VOLTAGE IS PRESENT ON DSO6000L SERIES POWER SUPPLY
HEAT SINKS !

The power supply heat sinks of the 6000L Series oscilloscopes are at a high potential. This presents an
electric shock hazard. Protect yourself from electric shock by keeping this area covered or by not coming
in contact with the heat sinks when the power cord is attached to the oscilloscope!

f Connect the power cord and check the power supply voltage between pins 1

and 6 of the system board side of the “DC cable”. The voltage should be 15 V
±10%.

• If the voltage is correct, then test the system board (see page 67).

• If the voltage is not correct, then replace the power supply (see page 79).

To check the 6000L Series system board

1 Remove the cabinet.
2 Check that all cable connections are securely connected from the system board

to:

• Power supply

• Fan

3 Verify the voltages at the system board test points listed in the table below.

Refer to Figure 11 on page 66 to locate the test points.

Troubleshooting 4

6000L Series Oscilloscopes Service Guide 67

Table 13 System Board Test Points

Test point Voltage Output from

regulator:

L3204 3.3 (+- 0.1) U3202
L3201 5.0 (+- 0.1) U3202
L3301 1.5 (+- 0.1) U3300
L3302 -5.2 (+- 0.1) U3301

4 If the voltage at test point L3301 and/or L3302 is not within the specified

range, replace the system board.

5 If all cables are properly connected and none of the previous tests confirm a

failure on another assembly, replace the system board.

4 Troubleshooting

To check the 6000L Series display output

To check the fan

1 Connect a known good external XGA display and power-up the display and the

oscilloscope.

2 If the known good display does show an output from the XGA port of the

oscilloscope, replace the system board.

The fan speed is controlled by a circuit on the system board.
1 If the fan is running, perform the internal self-tests. Go to “To run the internal

self-tests" on page 68.

2 If the fan is not running, it may be defective. Follow these steps:

a Disconnect the fan cable from the system board.
b Measure the fan voltage at the connector on the system board.

See the figure below for the location of the fan connector.

c If the fan voltage is approximately +8.5 Vdc at room temperature, replace the

fan. If the fan voltage is not approximately +8.5 Vdc, replace the system
board.

The proper voltage range depending on temperature is between +6.0 Vdc to
+11.5 Vdc.

To run the internal self-tests

Self Test performs a series of internal procedures to verify that the oscilloscope is
operating properly.

It is recommended that you run the Self Test:

• after experiencing abnormal operation

• for additional information to better describe an oscilloscope failure

• to verify proper operation after the oscilloscope has been repaired

Successfully passing Self Test does not guarantee 100% of the oscilloscope’s
functionality. Self Test is designed to provide an 80% confidence level that the
oscilloscope is operating properly.

1 Press the Utility key, then press the Service softkey. Use the Remote Front Panel

feature if you are testing a 6000L Series model.

68 6000L Series Oscilloscopes Service Guide

2 Begin the internal self tests by pressing the Start Self Test softkey.

To verify default setup

The oscilloscope is designed to turn on with the setup from the last turn on or
previous setup. However, if the Secure Environment option is installed, the
oscilloscope will always execute a Default Setup upon power-up.

To recall the factory default setup:

1 Press the Save/Recall key.
2 Press the Default Setup softkey.

This returns the oscilloscope to its factory default settings and places the
oscilloscope in a known operating condition. The major default settings are:

• Horizontal - main mode, 100 us/div scale, 0 s delay, center time reference

• Vertical - Channel 1 on, 5 V/div scale, dc coupling, 0 V position, probe factor

to 1.0 if an AutoProbe probe is not connected to the channel

• Trigger - Edge trigger, Auto sweep mode, 0 V level, channel 1 source, dc

coupling, rising edge slope, 60 ns holdoff time

• Display - Vectors on, 20% grid intensity, infinite persistence off

• Other - Acquire mode normal, Run/Stop to Run, cursor measurements off

Troubleshooting 4

6000L Series Oscilloscopes Service Guide 69

4 Troubleshooting

Figure 12 Default setup screen

3 If your screen looks substantially different, replace the system board.

70 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

Service Guide

5 Replacing 6000L

Assemblies

To remove the bottom cover / 73
To remove the front panel assembly / 74
To remove the system board / 76
To remove the power supply / 79
To remove the fan / 81
To remove the AC power input assembly / 83
To remove the powe r shaft / 85

This chapter describes how to remove assemblies from the Keysight 6000L Series
Oscilloscopes. After you have removed an assembly, to install the replacement
assembly, follow the instructions in reverse order.

The parts shown in the following figures are representative and may look different
than what you have in your oscilloscope.

Tools Used for Disassembly

Use these tools to remove and replace the oscilloscope assemblies:

• T10 TORX drivers

• 5/8-inch and 9/32-inch socket drivers

See how the Oscilloscope Parts Fit Together

An exploded view of the oscilloscope is included in the Chapter 6, “Replaceable
Parts,” starting on page 87. It shows the individual part numbers used in the
assemblies, and shows you how all of the assemblies fit together.

71

5 Replacing 6000L Assemblies

WARNING

WARNING

CAUTION

CAUTION

Read All Warnings and Cautions

Read the following warnings and cautions before removing and replacing any
assemblies in the oscilloscope.

HAZARDOUS VOLTAGES !

Read the safety summary at the back of this book before proceeding.
Maintenance is performed with power supplied to the oscilloscope and with the protective covers
removed. Only trained service personnel who are aware of the hazards involved should perform the
maintenance. Whenever possible, perform the procedures with the power cord removed from the
oscilloscope.

AVOID ELECTRICAL SHOCK !

Hazardous voltages exist on the LCD assembly and power supply. To avoid electrical shock:

1 Disconnect the power cord from the oscilloscope.
2 Wait at least three minutes for the capacitors in the oscilloscope to discharge before you begin

disassembly.

Read the Safety Summary at the back of this manual before you begin.

72 6000L Series Oscilloscopes Service Guide

REMOVE POWER TO AVOID DAMAGE !

Remove power before you begin to remove and replace assemblies. Do not remove or replace
assemblies while the oscilloscope is turned on, or damage to the components can occur.

AVOID DAMAGE TO ELECTRONIC COMPONENTS !

ELECTROSTATIC DISCHARGE (ESD) can damage electronic components. When doing any of the
procedures in this chapter, use proper ESD precautions. As a minimum, you should place the instrument
on a properly grounded ESD mat and wear a properly grounded ESD strap.

To remove the bottom cover

T-10 Screws

T-10 Screw

T-10 Screw

1 Turn off the oscilloscope and disconnect the power cable.
2 Turn the oscilloscope so the bottom is facing up.
3 Using a T10 screwdriver, remove 5 screws from the rear and sides of the

cabinet.

4 Slide the bottom cover back and up to remove.

Replacing 6000L Assemblies 5

Figure 13 Removing the cover

6000L Series Oscilloscopes Service Guide 73

5 Replacing 6000L Assemblies

Intensity
Knob

To remove the front panel assembly

1 Perform the following procedures:

• “To remove the bottom cover" on page 73

2 Insert a flat-blade screwdriver under the center of the intensity knob and gently

twist the screwdriver as you pull the knob off.

Using a twisting motion on the screwdriver rather than prying prevents marking
or damaging the front panel.

Figure 14 Removing the intensity knob

3 Disconnect the front panel ribbon cable from the system board by pressing the

release tabs and then disconnect it from the front panel PC board.

4 Use a flat-blade screwdriver to release the center retainer tab and push it

slightly out of the slot.

5 Use a flat-blade screwdriver to release the 2 side retainer tabs and remove

them from their slots.

74 6000L Series Oscilloscopes Service Guide

Replacing 6000L Assemblies 5

Front Panel
Ribbon Cable

Retainer Tab

System Board

Front
Panel

Retainer Tab Slot

Retainer Tab

Center Retainer Tab

100 MHz Auto
Probe Label

500 MHz Auto
Probe Label

Front
Panel PC
Board

Figure 15 Disconnecting ribbon cable and releasing tab retainers

6 Pull the front panel off of the oscilloscope.
7 Lift the front panel PC board to remove it from the front panel.
8 Reverse this procedure to replace the front panel.

6000L Series Oscilloscopes Service Guide 75

5 Replacing 6000L Assemblies

T10 Screws

Fan Cable

System Board

Backlight Inverter Cable

Power Supply
Cable

Front Panel
Cable

Power
Supply
Cable

Hex
Standoffs

To remove the system board

1 Perform the previous procedures:

• “To remove the bottom cover" on page 73

2 Remove the intensity knob as described in step 2 on page 74.
3 Disconnect the front panel ribbon cable from the system board by pressing the

release tabs.

4 Disconnect the fan cable.
5 Remove the 3 hex nuts and washers from the rear BNC connectors using a

5/8-inch socket driver.

Figure 16 Preparing to remove the system board

76 6000L Series Oscilloscopes Service Guide

Replacing 6000L Assemblies 5

CAUTION

ICs

Thermal
Pads

NOTE

6 Using a 9/23-inch hex driver, remove the two hex standoffs and washers from

the GPIB connector

7 Using a T10 Torx driver, remove the 5 screws that hold the system board to the

deck.

8 Remove the system board

a Lift the back of the board to clear the chassis.
b Gently pull the board out until you can disconnect the power supply cable.
c Continue to remove the board from the chassis.

To avoid tearing the thermal pads on a 500 MHz oscilloscope when removing or installing
the system board, hold the board up, away from the thermal pads until all components are
clear.

Figure 17 Avoid damage to thermal pads (500 MHz models only)

If the battery on the system board needs to be replaced, use a CR2477/1HF or CR2477/HFN
3V manganese dioxide lithium battery.

6000L Series Oscilloscopes Service Guide 77

5 Replacing 6000L Assemblies

9 Reverse this procedure to reinstall the system board:

78 6000L Series Oscilloscopes Service Guide

To remove the power supply

Power Input Board
Cable

T10 Screws

Power Input Board

Ground
Connector

Hole in
Divider

AC
Connector

Snap
Fasteners

Power to System
Board

1 Perform the previous procedures:

• “To remove the bottom cover" on page 73

• “To remove the system board" on page 76

2 Disconnect the ground cable and AC cables from the power supply using a

needle nose pliers if necessary.

3 Press the release latch to disconnect the power input board cable from the

power input board.

Replacing 6000L Assemblies 5

Figure 18 Removing the power supply.

4 Using a T10 Torx driver, remove the 2 screws securing the power supply to the

chassis.

6000L Series Oscilloscopes Service Guide 79

5 Replacing 6000L Assemblies

5 Using a flat-blade screwdriver through the hole in the divider, gently pry the

power supply board up enough to snap the power supply board off the rear
snap fastener.

6 Using a twisting motion, with a flat-blade screwdriver gently snap the power

supply board off the front snap fastener.

7 Reverse this procedure to install the power supply.

80 6000L Series Oscilloscopes Service Guide

To remove the fan

Fan

Flexible Fan
Mount

Chassis Divider

1 Perform the previous procedures:

• “To remove the bottom cover" on page 73

• “To remove the system board" on page 76

• “To remove the power supply" on page 79

2 Slide the fan and fan mount slightly up and out of the chassis.
3 Remove the fan from the flexible fan mount.

Replacing 6000L Assemblies 5

Though the fan can be removed without performing all of the above, it is
difficult to reinstall it.

Figure 19 Removing the fan.

6000L Series Oscilloscopes Service Guide 81

5 Replacing 6000L Assemblies

Pegs Fit in
Fan Holes

Holes in
Bottom Fit
Over Studs

Align
Notch
and
Chassis

Chassis
Divider

4 Replace the fan.

a Place the rectangular part of the flexible fan mount over the fan.
b Place the pegs in the flexible fan mount into the holes in the top and bottom

of the fan.

c Align the holes in the bottom of the flexible fan mount over the studs on the

chassis as you slide the fan over the divider in the chassis.

d Ensure that the notch in the rectangular portion of the fan mount aligns with

the front of the chassis.

82 6000L Series Oscilloscopes Service Guide

Figure 20 Installing the fan.

To remove the AC power input assembly

CAUTION

1 Perform the previous procedures:

• “To remove the bottom cover" on page 73

• “To remove the power supply" on page 79

• “To remove the fan" on page 81

2 Using a TORX T10 screwdriver, remove the screw securing the power

receptacle ground wire to the chassis.

3 Using a TORX T10 screwdriver, remove the screw securing the input board to

the chassis.

4 Lift and rotate the grooved input receptacle just enough to free it from the

opening in the chassis.

5 Slide the assembly toward the front of the chassis to remove the posts from the

keyholes.

6 Lift the whole assembly up and back to free the power shaft from the chassis.

Avoid breaking the power shaft. Use one hand on each of the 2 pieces of the assembly to
keep it in alignment as you remove it.

Replacing 6000L Assemblies 5

6000L Series Oscilloscopes Service Guide 83

5 Replacing 6000L Assemblies

Grooved
Receptacle

Power
Shaft

Posts (2) &
Keyholes (2)

T10 Screws

AC Input
Board

Ground Wire

Figure 21 Removing the AC power input board.

7 Reverse this procedure to install the AC power input board.

84 6000L Series Oscilloscopes Service Guide

To remove the power shaft

CAUTION

1 Perform the previous procedures:

• “To remove the bottom cover" on page 73

• “To remove the power supply" on page 79

• “To remove the fan" on page 81

2 Use a flat-blade screwdriver to gently spread the latch while pushing the power

shaft forward.

Twisting the latch too much could cause it to break!

Replacing 6000L Assemblies 5

Figure 22 Removing the power shaft.

3 Lift and remove it from the deck.
4 When reinserting the power shaft, push the shaft into the power switch until the

shaft snaps onto the switch.

6000L Series Oscilloscopes Service Guide 85

5 Replacing 6000L Assemblies

86 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

Service Guide

6 Replaceable Parts

Ordering Replaceable Parts / 88
Replaceable Parts for 6000L Series Oscilloscopes / 90

This chapter describes how to order replaceable assemblies and parts for the
Keysight 6000L Series Oscilloscopes.

Diagrams and parts lists are included for assemblies and hardware that you can
order.

Before working on the oscilloscope, read the safety summary at the back of this
book.

87

6 Replaceable Parts

Ordering Replaceable Parts

Listed Parts

To order a part in the parts list, quote the Keysight Technologies part number,
indicate the quantity desired, and address the order to the nearest Keysight
Technologies Sales Office. To find your nearest sales office go to

www.keysight.com.

Unlisted Parts

To order a part not listed in the parts list, include the instrument part number,
instrument serial number, a description of the part (including its function), and the
number of parts required. Address the order to the nearest Keysight Technologies
Sales Office.

Direct Mail Order System

Within the USA, Keysight Technologies can supply parts through a direct mail
order system. There are several advantages to this system:

• Direct ordering and shipping from the Keysight Technologies parts center in
California, USA.

• No maximum or minimum on any mail order. (There is 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 through your local
Keysight Technologies Sales Office. Addresses and telephone numbers are located
in a separate document shipped with the manuals.

88 6000L Series Oscilloscopes Service Guide

Exchange Assemblies

Some parts used in this instrument have been set up for an exchange program.
This program allows the customer to exchange a faulty assembly with one that
has been repaired, calibrated, and performance-verified by the factory. The cost is
significantly less than that of a new part. The exchange parts have a part number
in the form XXXXX-695XX.

After receiving the repaired exchange part from Keysight Technologies, a United
States customer has 30 days to return the faulty assembly. For orders not
originating in the United States, contact the local Keysight Technologies service
organization. If the faulty assembly is not returned within 30 days, the customer
will be charged an additional amount. The additional amount will be the difference
in price between a new assembly and that of an exchange assembly.

Replaceable Parts 6

6000L Series Oscilloscopes Service Guide 89

6 Replaceable Parts

Replaceable Parts for 6000L Series Oscilloscopes

6000L Series Oscilloscope Exploded Views

The following exploded views provide a graphical representation of the
oscilloscope at the time this manual was released. Not all parts are shown. Your
parts may be slightly different thank those shown. These views provide reference
designator numbers that map to those used in the replaceable parts list table that
follows.

90 6000L Series Oscilloscopes Service Guide

MP2

W1

MP5

A3

MP4

A1

A4

MP11

W2

MP12

A2

MP6

MP7

M82

MP10

MP9

MP2

MP3

Replaceable Parts 6

Figure 23 6000L Series Oscilloscope Exploded View

6000L Series Oscilloscopes Service Guide 91

6 Replaceable Parts

6000L Series Oscilloscope Replaceable Parts List

The information given for each part consists of the following:

• Reference designation from the exploded view.

• Keysight Technologies part number.

• Total quantity (QTY) in the instrument or on assembly.

• Description of the part.

Table 14 6000L Series Oscilloscope Replaceable Parts

Ref Des Keysight Part

Number

A1 D6104-66422 1 AC line filter/power switch/PC board assembly

A2 D6104-00101 1 Deck assembly

A3 D6104-68501 1 Fan assembly

A4 D6104-60001 1 Rackmount kit

MP1 D6104-66421 1 Autoprobe board

MP2 D6104-00104 1 Cover assembly

MP3 D6104-85401 1 Dielectric insulator panel

MP4 D6104-43901 1 Extender - power switch

MP5 D6104-44701 1 Fan mount

MP6 D6104-42201 1 Front panel bezel

MP7 D6104-94301 1 ID Label - 4 Ch, DSO 1 GHz

MP7 D6104-94302 1 ID Label - 4 Ch, DSO 500 MHz

MP7 D6104-94303 1 ID Label - 4 Ch, DSO 100 MHz

Qty. Description

MP8 54801-47401 1 Knob - 12 mm flint gray

MP9 54684-94314 1 Label - auto probe

92 6000L Series Oscilloscopes Service Guide

Table 14 6000L Series Oscilloscope Replaceable Parts (continued)

Replaceable Parts 6

Ref Des Keysight Part

Number

MP10 D6104-94307 1 Label - main 4 Ch, 100 MHz

MP10 D6104-94308 1 Label - main 4 Ch, 500 MHz/1 GHz

MP11 54684-66506 1 PC board assembly - 4 Ch, 1 GHz

MP11 54634-66501 1 PC board assembly - 4 Ch, 100 MHz

MP11 54674-66506 1 PC board assembly - 4 Ch, 500 MHz

MP12 0950-4853 1 Power supply

W1 D6104-61607 1 DC cable

W2 D6104-61601 1 Keyboard cable

Qty. Description

6000L Series Oscilloscopes Service Guide 93

6 Replaceable Parts

94 6000L Series Oscilloscopes Service Guide

Keysight InfiniVision 6000L Series Oscilloscopes

Service Guide

7 Safety Notices

This apparatus has been designed and tested in accordance with IEC Publication
61010-1, Safety Requirements for Measuring Apparatus, and has been supplied in
a safe condition. This is a Safety Class I instrument (provided with terminal for
protective earthing). Before applying power, verify that the correct safety
precautions are taken (see the following warnings). In addition, note the external
markings on the instrument that are described under "Safety Symbols."

95

7 Safety Notices

Warnings

Before turning on the instrument, you must connect the protective earth terminal
of the instrument to the protective conductor of the (mains) power cord. The
mains plug shall only be inserted in a socket outlet provided with a protective
earth contact. You must not negate the protective action by using an extension
cord (power cable) without a protective conductor (grounding). Grounding one
conductor of a two-conductor outlet is not sufficient protection.

Only fuses with the required rated current, voltage, and specified type (normal
blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited
fuseholders. To do so could cause a shock or fire hazard.

If you energize this instrument by an auto transformer (for voltage reduction or
mains isolation), the common terminal must be connected to the earth terminal of
the power source.

Whenever it is likely that the ground protection is impaired, you must make the
instrument inoperative and secure it against any unintended operation.

Service instructions are for trained service personnel. To avoid dangerous electric
shock, do not perform any service unless qualified to do so. Do not attempt
internal service or adjustment unless another person, capable of rendering first aid
and resuscitation, is present.

Do not install substitute parts or perform any unauthorized modification to the
instrument.

Capacitors inside the instrument may retain a charge even if the instrument is
disconnected from its source of supply.

Do not operate the instrument in the presence of flammable gasses or fumes.
Operation of any electrical instrument in such an environment constitutes a
definite safety hazard.

Do not use the instrument in a manner not specified by the manufacturer.

96 6000L Series Oscilloscopes Service Guide

To clean the instrument

If the instrument requires cleaning: (1) Remove power from the instrument. (2)
Clean the external surfaces of the instrument with a soft cloth dampened with a
mixture of mild detergent and water. (3) Make sure that the instrument is
completely dry before reconnecting it to a power source.

Safety Notices 7

6000L Series Oscilloscopes Service Guide 97

7 Safety Notices

!

Safety Symbols

Instruction manual symbol: the product is marked with this symbol when it is
necessary for you to refer to the instruction manual in order to protect against
damage to the product and preserve safe conditions.

Hazardous voltage symbol.

Earth terminal symbol: Used to indicate a circuit common connected to grounded
chassis.

98 6000L Series Oscilloscopes Service Guide

Index

Numerics

6000L, 4

A

AC input board removal, 83
assemblies

exchange, 89
replacing, 71

B

bandwidth

verification, 33

battery on system board, 77

C

cabinet, removing, 73
calibration, 51
cautions, 59, 60, 65, 72, 85
certificate of calibration, 51
channels

problem solving, 57
cleaning the instrument, 97
compensating your probe, 63
connecting for threshold test, 26
contact Keysight, 18

D

digital channel

testing, 24

verification, 25
digital channels, 4
display

problem solving, 56

E

equipment, test, 21

exchange assemblies, 89
exploded view

front panel, 91

F

fan removal, 81
front panel, 4

exploded view, 91
removal, 74

fuse, 65

H

horizontal

accuracy verification, 39

I

internal self-tests, 68

K

Keysight

contact information, 18

L

LED, startup sequence, 60

M

making test connector, 22
measurement accuracy, voltage, 29
measurement category, 15

definitions, 15

N

NIST, 51

O

ordering parts, 88
overvoltage category, 17

P

parts

list, 92

ordering, 88
perform user cal, 51
performance

test record, 46
pollution degree, 17

definitions, 17
power

supply removal, 79

switch removal, 85

test points, 66
power requirements, 14
probes

compensating, 63
problem solving, 55

R

record tests, 46
remove

AC input board, 83

cabinet, 73

fan, 81

front panel, 74

power supply, 79

power switch, 85

system board, 76
replaceable parts list, 92
replacing assemblies, 71
run self-tests, 68

S

safety notice, 49, 59, 60, 65, 67

6000L Series Oscilloscopes Service Guide 99

Index

self-alignment, user cal, 51
self-tests, 68
specifications, 18
startup sequence, 60
status, User Cal, 53
status, user cal, 51
system board

removal, 76

T

test

connector, constructing, 22
digital channels, 24
equipment, 21
points, power, 66
record, 46

threshold

accuracy, digital channel, 25
test diagram, 26

trace display

problem solving, 56, 57
transient withstand capability, 16
trigger

sensitivity, 41

sensitivity, external, 43

sensitivity, internal, 42
troubleshooting, 55

display, 68

equipment required, 60

fan, 68

flowchart, 64

power supply, 65

W

warnings, 72
warranted specifications, 18
warranty

status, 4

Web control, 4

U

user calibration, 51

V

verify

bandwidth, 33

digital channel, 25

horizontal accuracy, 39

trigger, 41
voltage measurement accuracy, 29

100 6000L Series Oscilloscopes Service Guide