SIGLENTSDS1000X-E Series
Digital Oscilloscope
Service Manual
SM0101E-E01A

SDS1000X-E Service Manual ICopyright and Declaration
Copyright
SIGLENT TECHNOLOGIES CO., LTD. All Rights Reserved.
Trademark Information
SIGLENT is the registered trademark of SIGLENT TECHNOLOGIES CO., LTD.
Declaration
SIGLENT products are protected by patent law in and outside of P.R.C.
SIGLENT reserves the right to modify or change parts of or all the specifications or
pricing policies at company‟s sole decision.
Information in this publication replaces all previously corresponding material.
Any way of copying, extracting or translating the contents of this manual is not allowed
without the permission of SIGLENT.
Product Certification
SIGLENT guarantees this product conforms to the national and industrial stands in
China and other international stands conformance certification is in progress.
Contact Us
If you have any problem or requirement when using our products, please contact
SIGLENTTECHNOLOGIES CO., LTD
Add：3//F, Bldg No.4, Antongda Industrial Zone, 3rd Liuxian Road, Bao‟an District,
Shenzhen, 518101,P.R.China
Tel：400-878-0807
E-mail：sales@siglent.com
http://www.siglent.com

General Safety Summary
Review the following safety precautions to avoid personal injuries andprevent damages to this product or any products connected to it. To avoid
potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.

To Avoid Fire or Personal Injuries
Use Proper Power Cord. Use only the power cord specified for this productand approved by your local governing agencies.
Avoid Electric Shock. To avoid injuries or potential loss of life, do notconnect or disconnect probes or test leads while they are connected to a
voltage source.
Ground the Product. This product is grounded through the protective
ground conductor of the power line. To avoid electric shock, the grounding
conductor must be connected to the earth ground. Make sure the instrument
is grounded correctly before connecting its input or output terminals.
Connect the Probe Properly. Do not connect the probe ground lead to ahigh voltage since it has the isobaric electric potential as ground.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all
ratings and markings on the instrument and check your manual for more
information about ratings before connecting.
Use Proper Fuse. Use only the specified fuse.
Do Not Operate Without Covers. Do not operate this instrument withcovers or panels removed.
Avoid Circuit or Wire Exposed. Do not touch exposed junctions andcomponents when the unit is powered.

Do Not Operate With Suspected Problems. If you suspect damage has
occurred to this instrument, have it inspected by qualified service personnel
before further operation. Any maintenance, adjustment or replacement,
especially to the circuits or accessories should be performed by SIGLENT
authorized personnel.

Keep Product Surfaces Clean and Dry.

Do Not Operate in Wet/Damp Conditions. To avoid electric shock, do not
operate the instrument in wet or damp conditions.

Do Not Operate in an Explosive Atmosphere. To avoid injuries or fire
hazards, do not operate in an explosive atmosphere.

Safety Terms and Symbols

Terms on the Product. These terms may appear on the product:

DANGER: Indicates an injury or hazard that may immediately happen.
WARNING: Indicates an injury or hazard may be potentially accessible.
CAUTION: Indicates damage to the instrument or other property may occur.

Symbols on the Product. These symbols may appear on the product:

SDS1000X-E Service ManualContents

General Safety Summary ................................................................................................................ III
General Features ............................................................................................................................... 7
Prepare Information ........................................................................................................................ 10
Functional checking ............................................................................................................... 10Power-on Inspection ..................................................................................................... 10
Probe Compensation ..................................................................................................... 12
Auto Setup .................................................................................................................... 14
Self Calibration ............................................................................................................. 15
Interface Test .......................................................................................................................... 16
USB Host Test............................................................................................................... 16
USB Device Test ........................................................................................................... 17
LAN Port Test ............................................................................................................... 19
Pass/Fail out Test .......................................................................................................... 21
Performance Test............................................................................................................................. 23
To Verify DC Gain Accuracy ................................................................................................. 28
To Verify Offset Accuracy...................................................................................................... 31
To Verify Time Base Accuracy .............................................................................................. 33
To Verify Trigger Delay ......................................................................................................... 34
To Verify Ext Trigger Delay................................................................................................... 35
To Verify Ext Trigger Level ................................................................................................... 36
To Verify Noise Floor ............................................................................................................ 37
To Verify Bandwidth .............................................................................................................. 39
To Verify Bandwidth Limit .................................................................................................... 41
To Verify Trigger Sensitivity .................................................................................................. 43
To Verify Input Impedance..................................................................................................... 45
Disassembly Procedures ................................................................................................................. 46
Safety Consideration and Cautions ........................................................................................ 46
Tools Lists .............................................................................................................................. 47
Disassembly Procedures ........................................................................................................ 48
2-Channel Module ........................................................................................................ 48
4-Channel Module ........................................................................................................ 57
Solving General Problems .............................................................................................................. 66
If there is no display ............................................................................................................... 66
If the display stuck at logo graph ........................................................................................... 66
If there is no trace display ...................................................................................................... 66
If the baseline trace drift out of specification......................................................................... 67
If there is an unexpected trace when no input connected to channel input ............................ 67
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Troubleshooting .............................................................................................................................. 68
Safety Consideration and Cautions ........................................................................................ 68
Required equipment ............................................................................................................... 69
Troubleshooting Flowchart .................................................................................................... 69
For 2-Channel Module ........................................................................................................... 71
Main Board Drawing .................................................................................................... 71
To Check the Power Supply Module ............................................................................ 71
To Check the Main Board ............................................................................................. 72
To Check the Processor System .................................................................................... 73
Check the clock............................................................................................................. 73
To Check the Acquisition System ................................................................................. 74
To Check Other Power Supplies ................................................................................... 75
To Check the LCD ........................................................................................................ 76
For 4-Channel Module ........................................................................................................... 78
Main Board Drawings ................................................................................................... 78
To Check the Power Supply Module ............................................................................ 78
To Check the Main Board ............................................................................................. 79
To Check the Processor System .................................................................................... 80
To Check the Acquisition System ................................................................................. 81
To Check Other Power Supplies ................................................................................... 82
To Check the LCD ........................................................................................................ 83

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SDS1000X-E Service Manual

General Features
SIGLENT‟s new SDS1000X-E Super Phosphor Oscilloscopes feature twochannel and four channel models. The two channel model is available with a
200 MHz analog bandwidth (model SDS1202X-E), a single ADC with a 1
GSa/s maximum sample rate, and a single memory module with 14Mpts ofsample memory. The four channel scope is available in 100 and 200 MHz
models and incorporates two 1 GSa/s ADCs and two 14Mpts memory modules.
When all channels are enabled, each channel has sample rate of 500MSa/s
and a standard record length of 7Mpts. When only a single channel per ADC is
active, the maximum sample rate is 1GSa/s and the maximum record lengthis14Mpts. For ease-of-use, the most commonly used functions can beaccessed with its user- friendly front panel design.

The SDS1000X -E series employs a new generation of SPO (Super -Phosphor
Oscilloscope)technology

that

providesexcellentsignalfidelity

andperformance. The system noise is also lower than similar products in theindustry. It comes with a minimum vertical input range of 500 uV/div, aninnovative digital trigger system with high sensitivity and low jitter, and a
waveform capture rate of 400,000 frames/sec (sequence mode). The
SDS1000X -E also employs a 256 -level intensity grading display function anda color temperature display mode not found in other models in this class.
SIGLENT‟s latest oscilloscope offering supports multiple powerful triggeringmodes

includingserialbus

triggering.

Serialbus

decoding

for

IIC,SPI,UART,CAN,LIN bus types is included. The X-E models also include
History waveform recording, and sequential triggering that enable extended
waveform recording and analysis. Another powerful addition is the new
1million point FFT math function that gives the SDS1000X-E very high
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SDS1000X-E Service Manualfrequency resolution when observing signal spectra. The new digital design
also includes a hardware co-processor that delivers measurements quickly
and accurately without slowing acquisition and front-panel response. The
features and performance of SIGLENT‟s new SDS1000X -E cannot bematched anywhere else in this price class.
The four channel series includes even more functions, including: searchingand navigating, on-screen Bode plot, 16 digital channels(Option), an external
USB powered 25 MHz AWG module(Option), a USB WIFI adapter(Option),and an embedded application that allows remote control via web browser.
Table 1 General features
SDS1104X-E
Model

SDS1204X -E
SDS1202X -E
100 MHz
200 MHz
Bandwidth
Two channel series have a single 1GSa/s ADC, fourchannel series have two 1GSa/s ADCs. When all
channels are enabled, each channel has a maximum
SamplingRate(Max.)
sample rate of 500 MSa/s. When a single channel perpair is active, , that channel has sample rate of 1
GSa/s
4 (four channel series)
Channels
2+EXT (two channel series)
7Mpts/CH(not interleave mode);
Memory14Mpts/CH(interleave mode)
Depth(Max.)










100MHz, 200MHz bandwidth models
Two channel series have one 1GSa/s ADC, four channel series have two
1GSa/s ADCs. When all channels are enabled, each channel has amaximum sample rate of 500 MSa/s. When a single channel per ADC is
active, it has sample rate of 1 GSa/s
The newest generation of SPO technology
Waveform capture rate up to 100,000 wfm/s (normal mode), and 400,000
wfm/s (sequence mode)
Supports 256-level intensity grading and color display modes
Record length up to 14 Mpts
Digital trigger system
Intelligent trigger: Edge, Slope, Pulse Width, Window, Runt, Interval, Time
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

























out (Dropout), Pattern
Serial bus triggering and decoding (Standard), supports protocols IIC, SPI,UART, RS232,CAN,LIN
Video trigger, supports HDTV
Low noise floor with voltage scales from 500μV/div to 10V/div
10 types of one-button shortcuts, supports Auto Setup, Default, Cursors,
Measure, Roll, History, Display/Persist, Clear Sweep, Zoom and Print
Segmented acquisition (Sequence) mode, divides the maximum record
length into multiple segments(up to 80,000), according to trigger conditions
set by the user, with a very small dead time segment to capture thequalifying event.
History waveform record (History) function(maximum recorded waveform
length is 80,000 frames)
Automatic measurement function for 38 parameters as well as
Measurement Statistics, Zoom, Gating, Math, History and Referencefunctions
1Mpts FFT
Math and measurement functions use all sampled data points (up to
14Mpts)Math functions (FFT, addition, subtraction, multiplication,division,
integration, differential, square root)
Preset key can be customized for user settings or factory “defaults”
Security Erase mode
High Speed hardware based Pass/ Fail function
16 Digital channels (MSO) (four channel series only, option)
Bode plot(four channel series only)
Search and navigate(four channel series only)
USB AWG module(four channel series only, option)
USB WIFI adapter(four channel series only, option)
Web Browser based control(four channel series only)
Large 7 inch TFT -LCD display with 800 * 480 resolution
Multiple interface types: USB Host, USB Device (USB -TMC), LAN Pass /Fail, Trigger Out
Supports SCPI remote control commands
Supports Multi-language display and embedded online help

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SDS1000X-E Service Manual

Prepare Information
Before initiating performance verification or any adjustments, it isrecommended the user follow these procedures. The following topics are
discussed in this chapter.






How to perform functional checks
How to operate four standard interface tests
How to use self-calibration routine
How to recall factory Default settings

For more detailed information about oscilloscope operation, please refer to the
Quick Start Guide.

Functional checking
The functional checking details four types of checks used to determine if theoscilloscope is operating properly.

Power-on Inspection
The power requirements of the oscilloscope are 100-240 V, 50/60Hz or
100-120 V, 400Hz. Please use the power cord supplied with the accessories toconnect the oscilloscope to the power source.

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SDS1000X-E Service Manual

Power
Power
socketsocket2-channel scope

4-channel scope

Figure 1 Connect power cord
Note: To avoid electric shock, make sure that the instrument iscorrectly grounded to the earth before connecting AC power.
Press the power-on button located at the lower left corner of the front panel
and note that several oscilloscope keys will be lighted for about 6 seconds
simultaneously, until the boot screen appears. The oscilloscope will then begin
to perform its power-on tests automatically, after which the Default button canbe pressed in order to recall the factory default settings.

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SDS1000X-E Service Manual

Probe Compensation
It is necessary to compensate the probe at first use so as to properly match theprobe to the oscilloscope‟s input channel. Non-compensated or poorly
compensated probes may cause measurement inaccuracies or errors. The
probe compensation steps are as follows:
1. Set the attenuation switch on the probe to 10X.

Figure 2 Set the attenuation switch
2. Connect the alligator clip of the probe to the Ground Terminal on the front
panel, and then use the probe to connect CH1 BNC input connector to theCompensation Signal Output Terminal.
Compensation Signal Output Terminal
Ground Terminal

2-channel scope

Ground Terminal
Compensation Signal Output Terminal

4-channel scope
3. Press Auto Setup .
4. Observe waveform on the screen. The displaying should be a square
waveform as shown in the figure below:
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Under
CompensatedCompensatedCorrectlyOver
Compensated

5. If the waveform does not show as “compensated correctly”, use anonmetallic screwdriver to adjust the low-frequency compensation
adjustment hole on the probe until the waveform displays correctly.

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SDS1000X-E Service Manual

Auto Setup
Press the Auto Setup key to enable the waveform auto setting function. The
oscilloscope will automatically adjust the horizontal time base, vertical scale
and trigger mode according to the input signal to obtain an optimum waveform
display.



The input signal frequency must be higher than 20 Hz, with the amplitude
greater than 8 mV.



Select the channel with the lowest frequency when several channels areconnected to signals.

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SDS1000X-E Service Manual

Self Calibration
The self-calibration program can quickly make the oscilloscope reach the best
working state to get the most precise measurement values. You can performself-calibration at any time especially when the change of the environment
temperature is up to or more than 5 ℃. Make sure that the oscilloscope has
been warmed up or operated for more than 30 minutes before theself-calibration.

Do the following steps to do self calibration:
1. Disconnect all the input channels.
2. Press the Utility button on the front panel, and then press the Do Self Cal
softkey, and the oscilloscope will pop-out the message box shown as
below:

Figure 3 Calibration Interface
3. Press the Single button on the front panel to perform the self calibration
program. During the calibration, most of the oscilloscope‟s keys are
disabled.
4. When the self calibration process is completed, the following message willappear: “Press Run/Stop key to exit”. Press the Run/Stop button on thefront panel to exit the calibration interface.

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SDS1000X-E Service Manual

Interface Test
The SDS1000X-E series oscilloscope is designed with four standard interfaces:
USB Host, USB Device, LAN and Pass/Fail. Connecting to other instruments
via these interfaces enables the oscilloscope to achieve additional capabilities.
In order to ensure the oscilloscope is operating properly it is recommended
that the user first test the interfaces.

USB Host Test
To test whether the USB Host interface is operating correctly.
Tools:● A U disk
Steps：
1. Insert a U disk (flash drive) into the USB Host interface on the front panel ofthe oscilloscope.
2. A message prompt “USB Flash Drive Detected.” appears on the screen, andan icon will be shown in the lower right corner of the screen which confirms
the U disk has been successfully recognized.

Figure 4 USB drive in interface
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SDS1000X-E Service Manual

USB Device Test
To test if the USB Device interface operating correctly.
Tools：● A computer with USB interface● A standard USB cable (Type AB)● NI Max software
Steps：
1. Set up NI Max software in a computer and Install the driver step by step
following the instructions.
2. Connect the oscilloscope to the computer using an USB cable.
3. Run NI Max software. Click “Device and Interface” at the upper left corner of
the NI software interface and immediately the “USBTMC” device symbol isdisplayed.

4. Click “Open VISA Test Panel” option button, and then the following Interface
will appear. Next, click the “Input/Output” option button and click the “Query”
option button in order to view the Read operation information.

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LAN Port Test
Use to test if the LAN interface operates correctly when connected with NI Visa
software.
Tools：● A computer with LAN interface● A standard LAN cable●NI Max software
Steps：
1. Set up NI Max software in a computer and install the driver using thefollowing instructions.
2. Press Utility
NextPage2/4
Address and Subnet Mask.

I/O

LAN

IP Set, input usable IP

Figure 5 IP Setting interface
3. Connect the oscilloscope to the computer using a LAN cable via the LANinterface ports.
4. Run NI Max software. Click “Device and Interface” at the upper left corner of
the NI software interface and select the “LAN” device symbol.
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SDS1000X-E Service Manual

5. Click “Open VISA Test Panel” option button, which then displays thefollowing interface (below). Then click the “Input/Output” option button andclick the “Query” option button. The Read operation information will be
displayed.

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SDS1000X-E Service Manual

Pass/Fail out Test
To test the Pass/Fail function and signal output by viewing on a second
oscilloscope.
Tools：


A second oscilloscope
Two BNC cables

Steps：
1. Turn on the SDS1000X-E oscilloscope.
2. Enable Channel 1.
3. Press Utility
Next Page2/4
Pass/Fail menu as below:

Pass/Fail, set the submenu items under

Table 2 Pass/Fail submenu items
Submenu
Setting
Enable Test

On

SourceCH1

Msg Display

On

Mask setting
X MaskY Mask

0.32div
0.32div

Note: Remember to press “Create Mask” to complete Mask setting, after x
mask setting and y mask setting.
After selecting the corresponding items as shown in the table above, theSDS1000X-E screen will appear as in Figure 6:

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SDS1000X-E Service Manual

Figure 6 Pass/Fail WaveformIf the waveform is within the range that was set under Mask menu setting, thewaveform displayed on the screen will Pass. If any part of the trace falls
outside the Mask area then it will Fail.
4. Connect the Pass/Fail output signal (on the rear panel) to the input terminalof another oscilloscope.
5. Move the waveform on the screen up, down, or sideways so that any portionof it falls outside of the Pass/Fail mask. If the interface is operating normallythen a pulse will appear on the second oscilloscope (Figure 7). Adjust thesecond oscilloscope‟s time base and voltage scale as needed. If there is noviewable pulse on the second oscilloscope then there may be a problem withthis function.

Figure 7 Pulse Waveform

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SDS1000X-E Service Manual

Performance Test
This chapter explains testing the oscilloscope in order to verify performance
specifications. For accurate test results, please let the test instruments and theoscilloscope warm up 30 minutes before testing.
Below is the required equipment for the test:
Table 3 Test equipment
Equipment

Fluke 9500B + Active
Heads

GPIB Card and Cable

USB Cable

BNC Cables

Description

Test item

High Performance
Oscilloscope Calibrator

DCG\Offset\ Clockaccuracy\Trigger delay\BW\BWL\trigger
sensitivity\ Input
impedance\ Ext Trigger
delay\Ext Trigger level

For communication
between the computer
and the 9500B
For communication
between the computer
and the SDS1000X-E
BNC(m) to BNC(m),Approx.1m long

BNC T Connectors

For signal distribution

Terminal Load

50 ohmDCG\Offset\Ext Trigger
level
Ext Trigger delay\
BW\BWL\trigger
sensitivity

Computer

The figures below show the interconnections between the test equipment and
PC to the oscilloscope under test (Table 3):

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SDS1000X-E Service Manual

9500B

GPIB

SDS1004X-E

USB

CH
1

CH1

CH
2

CH
3

CH
4

PC

BNC CABLE

Figure 8 Connecting test instruments for DCG\Offset

9500B

GPIB

USB

SDS1004X-E
CH
1

CH1

CH
2

CH
3

CH
4

PC

BNC CABLE

Figure 9 Connecting test instruments for Clock\Trigger Delay

9500B

GPIB

USB

SDS1004X-E
CH
1

CH1
PC

CH
2

CH
3

CH
4

50ohm

BNC CABLE

Figure 10 Connecting test instruments for BW\BWL\Trigger Sensitivity

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SDS1000X-E Service Manual

9500B

GPIB

USB

SDS1004X-E
CH
1

CH1

CH
2

CH
3

CH
4

PC

BNC CABLE

Figure 11 Connecting test instruments for Input impedance

The figures below show the interconnections between the test equipment and
PC to the SDS1002X-E for Ext Trigger test:

9500B

GPIB

USB

CH
1

CH2

CH1

SDS1002X-E
CH
2
50oh
m

PC

EXT
50oh
m

BNC CABLE

Figure 12 Connecting test instruments for Ext Trigger Delay

9500B

GPIB

USB

SDS1002X-E
CH
1

CH1

CH
2

EXT

PC

BNC CABLE

Figure 13 Connecting test instruments for Ext Trigger Level

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9500B

GPIB

USB

SDS1002X-E
CH
1

CH1

CH
2

EXT
50oh
m

PC
BNC CABLE

Figure 14 Connecting test instruments for Ext Trigger Sensitivity

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SDS1000X-E Service Manual

Verify Test Results
To verify whether or not a test passes (i.e. whether the readings are within theappropriate limits), it is necessary to record the readings in the Performance
Test located in the Test Record.

Self Calibration
The Self Calibration procedure is described in Chapter "Self Calibration". If theenvironmental temperature changes by more than 5℃, the Self Calibration
operation must be performed in order to achieve the specifications.

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To Verify DC Gain Accuracy
DC Gain Accuracy Slope = LINEST(Verror1:Verror5, VSetting1:VSetting5)
Note:“VSetting” represents DC voltage output level setting;“Verror“ represents the difference between the output setting and themeasurement.
This test verifies DC Gain Accuracy of all channels.
Steps:
1. Set the 9500B output to on.
2. Connect all channels of the oscilloscope to the 9500B as shown in Figure8.
3. Set Volts/Div of the oscilloscope to 2 mV/div. Press the Measure button on
the front panel of the oscilloscope to display Mean measurement.
4. Set DC voltage output level of the 9500B according to Table 4, and record
mean value of the oscilloscope as Vmean.
5. Calculate Verror(Verror=VSetting－Vmean),and set the next output level as step 4.
6. Make a linear regression with these 5 data points: VSetting1~VSetting5,
Verror1~Verror5. Check if the slope falls within the range shown in Table 4.
7. Set the oscilloscope Volts/Div to the other settings in Table 4, and repeat
steps 4 to 6.
8. Turn the 9500B output off.
9. Disconnect the connection to all the channels.

Table 4 DC Gain Accuracy
Volt/DivDC voltage output levels
10 V/div
30 V,15V ,0,-15 V,-30 V
5 V/div
15 V, 7.5 V,0,-7.5 V,-15 V
2 V/div
6 V,3 V,0,-3 V,-6 V
1 V/div
3 V,1.5 V,0,-1.5 V,-3 V
500 mV/div

1.5 V, 0.75 V,0,-0.75 V,-1.5 V

200 mV/div

600 mV, 300 mV,0,-300 mV,-600mV

DC Gain Accuracy
error
± 3%
± 3%
± 3%
± 3%
± 3%
± 3%

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100 mV/div
50 mV/div
20 mV/div
10 mV/div
5 mV/div
2 mV/div

300 mV,150 mV,0,-150 mV,-300mV
150 mV,75 mV,0,-75 mV,-150 mV
60 mV,30 mV,0,-30 mV, -60 mV
30 mV,150 mV,0,-150 mV,-30 mV
15 mV,7.5 mV,0,-7.5 mV-15 mV
6 mV, 3 mV,0,-3 mV, -6 mV

± 3%
± 3%
± 3%
± 3%
± 3%
± 4%

DC Gain Accuracy = (|Vmea1|+| Vmea2|-(|Vset1|+|Vset2|))/ (|Vset1|+| Vset2|)*100%
Note:“Vset” represents DC voltage output level setting;“Vmea“ represents the measurement.
This test verifies DC Gain Accuracy in Different Sampling Rate.
Steps:
1. Set the 9500B output to on.
2. Connect channel 1 of the oscilloscope to the 9500B.
3. Set the oscilloscope Sec/Div to 200 us/div. Only turn on channel 1 and thesample rate will be automatically set to 1 GSa/s.
4. Set Volts/Div of channel 1 to 500 mV/div. Press the Measure button on thefront panel of the oscilloscope to display Mean measurement.
5. Set DC voltage output level Vset of the 9500B according to Table 5, andrecord mean value of the oscilloscope as Vmea.
6. Calculate the DC Gain Accuracy and check if it falls within the range shownin Table 5.
7. Set the Memory Depth to 1.4 Mpts and turn on channel 2, then the sample
rate will be automatically set to 250 MSa/s.
8. Repeat steps 5 to 6.
9. Turn the 9500B output off.
10. Disconnect the connection to the channel.

Table 5 DC Gain Accuracy in Different Sampling Rate

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SDS1000X-E Service ManualVolt/Div
500 mV/div
500 mV/div

Sampling Rate

DC voltage output

1 GSa/s
250 MSa/s

1.5 V,-1.5 V
1.5 V,-1.5 V

DC GainAccuracy error
± 3%
± 3%

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To Verify Offset Accuracy
Offset Accuracy Slope = LINEST(Offseterror1:Offseterror5, Offsetout1:Offsetout5)

Note:“Offsetout” represents DC voltage output level setting;“Offseterror“ represents the difference between the output setting and themeasurement.
This test verifies Offset Accuracy of all the channels.
Steps:
1. Set the 9500B output to on.
2. Connect all channels of the oscilloscope to 9500B as shown in Figure 8.
3. Set the Volts/Div of channel to 2 mV/div. Press Measure button on the front
panel of the oscilloscope to display Mean measurement.
4. According to Table 6, set offset of the channel to -Offset, and set the 9500B
output level to equal the offset, then record the mean value of theoscilloscope as Vmean. When the offset is 0, set the 9500B output to off andrecord the mean value of the oscilloscope as Vzero.
5. Calculate Offseterror (Offseterror= Vmean - Offset), and adjust the 9500B to the
output level as step 4.
6. Make a linear regression with these 5 data points: Offseterror1~Offseterror5,
Offsetout1~Offsetout5. Check to verify that the slope is within the limits specified
in Table 6.
7. Check to verify that abs(Vzero) in step 4 is within the limits specified in Table
6.
8. Set the oscilloscope Volts/Div to the other settings in Table 6, and repeat
the steps 4 to 6.
9. Turn the 9500B output off.
10. Disconnect the connection to all the channels.

Table 6 Offset Accuracy
Volt/Div
10 V/div

Offset

Slope
error

Zero
input(V)35 V,30 V,0,-3 0V,-35 V±1.5%±1.20231

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5 V/div
2 V/div
1 V/div
500 mV/div
200 mV/div
100 mV/div
50 mV/div
20 mV/div
10 mV/div
5 mV/div
2 mV/div

30 V,25 V,0,-25 V,-30 V
20 V,10 V,0,-10 V,-20 V
10 V,5 V,0,-5 V,-10 V
5 V,2.5 V,0,-2.5 V,-5 V
2 V,1 V,0,-1 V,-2 V
1 V,0.5 V,0,-0.5 V,-1 V
500 mV,250 mV,0,-250 mV,-500mV
200 mV,100 mV,0,-100 mV,-200mV
100 mV, 50 mV,0,- 50 mV,-100mV mV,-50 mV
50 mV,25 mV,0,-25
20 mV, 10 mV,0,-10 mV, -20 mV

±1.5%
±1.5%
±1.5%
±1.5%
±1.5%
±1.5%
±1.5%

±0.602±0.242±0.122±0.062±0.026±0.014±0.008±1.5%±0.0044

±1.5%
±1.5%
±1.5%

±0.0032±0.0026±0.00224

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To Verify Time Base Accuracy
This test verifies the time base accuracy of the oscilloscope. In the test, theimpedance of both the 9500B and the oscilloscope should be set to 1 MΩ.
Time Base Accuracy: Frequency Error < 500 Hz
Steps:
1. Connect selected channel of the oscilloscope to the 9500B.
2. Set the oscilloscope Volts/Div to 100 mV/div.
3. Set the oscilloscope Sec/Div to 50 ms/div.
4. Set the Memory Depth to 14 Mpts, and the sample rate will be
automatically set to 20 MSa/s.
5. Disable the Roll mode if it is enabled.
6. Set waveform of the 9500B to sine, amplitude to 600 mV, and frequency tothe value (20 MHz) which is equal to the sample rate of the oscilloscope.
7. Press Measure button on the front panel of the oscilloscope to display
Freq measurement.
8. Check if the Freq measurement is less than 500 Hz.
9. Disconnect the test connection.

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To Verify Trigger Delay
This test checks the trigger delay of the analog channels. In this test, theimpedance of both the 9500B and the oscilloscope should be set to 1 MΩ.
Channel Trigger Delay Limit: abs(T@L) ≤ 100 ps
Steps:
1. Connect selected channel of the oscilloscope to the 9500B.
2. Set impedance of the 9500B to 1 MΩ, frequency to 50 MHz, amplitude to
800 mV, and waveform to Sine.
3. Set the oscilloscope Volts/Div to 100 mV/div.
4. Set the oscilloscope Sec/Div to 2 ns/div.
5. Press Measure button on the front panel of the oscilloscope to display
Time@Level measurement.
6. Check if the result is in the limited range above.
7. Disconnect the test connection.
8. Check other channels in the same way as steps 1 to 7.

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To Verify Ext Trigger Delay
This test checks the delay between ext trigger channel and analog channels. In
the test, the impedance of the 9500B should be set to 50 Ω and the 50 Ω
feedthrough terminations need to be connected with the ext trigger channel
selected analog channel.
CH-Ext Trigger Delay Limit: abs(Delay) ≤ 1 ns
Steps:
1. Connect selected analog channel and ext trigger channel of theoscilloscope to the 9500B with active heads (CH1/CH2).
2. Press the „Aux‟ key at the right of the „OSCILLOSCOPE CALIBRATOR‟
panel of the 9500B and select the Zero Skew function.
3. Set impedance of the 9500B to 50 Ω, frequency to 1 KHz, and amplitude to
0.6 V.
4. Set the oscilloscope Volts/Div to 100 mV/div.
5. Set the oscilloscope Sec/Div to 2 ns/div.
6. Set the oscilloscope trigger source to EXT, the trigger slope to Rising, andthe trigger level to 0.
7. Press Measure button on the front panel of the oscilloscope to display
Delay measurement.
8. Check if the delay is within the limited range above (≤ 1 ns).
9. Disconnect the test connection.
10. Check the other analog channel in the same way as steps 1 to 9.

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To Verify Ext Trigger Level
This test checks the trigger level accuracy of the ext trigger. In this test, theimpedance of both the 9500B and the oscilloscope should be set to 1 MΩ.
Table 7 EXT Trigger Level data
Trigger
Volt/div
ChannelEXT

200 mV

EXT/5

1V

Trigger Level Limited Range
300 mV~500 mV-500 mV~-300 mV
1.5 V~2.5 V-2.5 V~-1.5 V

Steps:
1. Connect channel 1 and ext trigger channel of the oscilloscope to the 9500B
with a BNC T connector, as shown in Figure 13.
2. Set impedance of the 9500B to 1 MΩ, frequency to 1 kHz, amplitude to 800
mV, and waveform to sine.
3. Set the oscilloscope Sec/Div to 500 us/div.
4. Set the oscilloscope Volts/Div to 200 mV/div, trigger source to EXT, andcoupling mode to DC.
5. Set the trigger level to find the level that can not trigger the waveform.
6. Check if the trigger level is in the limited range above.
7. Set amplitude of the 9500B to 4V, set trigger source of the oscilloscope to
EXT/5, and the Volts/div to 1 V.
8. Repeat step 5 to step 6.
9. Disconnect the test connection.

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To Verify Noise Floor
This test checks the noise floor of the analog channels, and varies frommodels. In this test, do not connect any testing devices to the oscilloscope.
For 2-Channel models:Table 8 Noise Floor Limited Range for 2-Channel
Volt/Div

Stdev Limited Range

Volt/Div

Stdev Limited Range

500 uv≤ 250 uv

100 mV≤ 10 mV

1 mV≤ 0.2 mV

200 mV≤ 20 mV

2 mV≤ 0.2 mV

500 mV≤ 50 mV

5 mV≤ 0.5 mV

1V

≤ 100 mV

10 mV

≤ 1 mV2V≤ 200 mV

20 mV

≤ 2 mV

5V≤ 500 mV

50 mV

≤ 5 mV

10 V≤1V

Steps:
1. Set the oscilloscope Sec/Div to 1 ms/div.
2. Set the oscilloscope Volts/Div to 500 uV/div.
3. Press Measure button on the front panel of the oscilloscope to display
Stdev measurement.
4. Check if the Stdev is in the limited range shown in Table 8.
5. Check the other analog channel in the same way as steps 1 to 4.
6. Set the oscilloscope Volts/Div to the others in Table 8, and repeat the steps
3 to 5.
For 4-Channel models:Table 9 Noise Floor Limited Range for 4-Channel
pkpk/stdev
SNR
Volt/Div
LimitedLimitedVolt/Div
Range
Range
500 uV[0,12][19,55]
100 mV
1 mV[0,12][25,55]200 mV
2 mV[0,12][27,55]500 mV

pkpk/stdev
LimitedRange[0,12][0,12][0,12]

SNR
LimitedRange[36,55][36,55][36,55]37

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5 mV
10 mV
20 mV
50 mV

[0,12][0,12][0,12][0,12][31,55][35,55][36,55][36,55]

1V
2V
5V
10 V

[0,12][0,12][0,12][0,12][36,55][36,55][36,55][36,55]

Steps:
7. Set the oscilloscope Sec/Div to 1 ms/div.
8. Set the oscilloscope Volts/Div to 500 uV/div.
9. Press Measure button on the front panel of the oscilloscope to display
Stdev and Peak-Peak measurement.
8∗vdiv

10. Calculate SNR (SNR =20 ∗ log10 2∗ 2∗stdev ), pkpk/stdev.
11. Check if the SNR and pkpk/stdev are in the limited range shown in Table 9.
12. Check the other analog channels in the same way as steps 1 to 5.
13. Set the oscilloscope Volts/Div to the others in the table above, and repeat
the steps 3 to 5.

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To Verify BandwidthThis test checks the bandwidth of all analog channels. In the test, theimpedance of 9500B should be set to 50 Ω, and a 50Ω feedthrough terminationneed to be connected with the channel of oscilloscope.
The bandwidth should be verified at 2 V/div、200 mV/div and 100 mV/div.
Steps:
1. Connect channel 1 of the oscilloscope to the 9500B via the active head, as
shown in Figure 10.
2. Set the oscilloscope Volts/Div to 2 V/div, the Sec/Div to 50 ms/div.
3. Press the Measure button on the front panel of the oscilloscope to display
Peak-Peak measurement.
4. Set waveform of the 9500B to sine, amplitude to 5.5 V, and impedance to
50 Ω.
5. Set frequency of the 9500B to the frequency in Table 10. When testing at
200 mV/div or 100 mV/div, set start frequency at 100 kHz. Set frequency
start frequency at 1 MHz when testing at 2 V/div.
Table 10 Frequency points in the test
Scope Model

Frequency Point (Hz)SDS1204X-E

100k,500k,1M,5M,10M,50M,100M,140M,180M,20/SDS1202X-E

0M,220M,250M

6. Every time the frequency is changed, it is recommended to adjust the
Sec/Div to a proper value in order to display a complete waveform.
7. Record the Peak-Peak measurement of the waveform.
8. Set the oscilloscope Volts/Div to the setting choices, and repeat the steps 2
to 7. Set amplitude of the 9500B to 600 mV when testing at 100 mV/div, andset to 1.2 V when testing at 200 mV/div.
9. Check other channels in the same way as steps 1 to 8.
10. Disconnect the test connection.
After the test, calculate the dB value at every frequent point. Check if the value
is in limited range in Table 11.
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Table 11 Limited Range
Scope Model

SDS1204X-E/

Frequency Point (Hz)

Range

≤20M

(-1,1) dB≤100M(-2,2) dB

100M< ≤200M(-3,2) dB>200M(-4,2) dB

250M(-6,2) dB

SDS1202X-E

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To Verify Bandwidth Limit
This test checks the bandwidth limit of all the analog channels. The test issimilar to the bandwidth test except that the bandwidth limit is turned on.
In the test, the impedance of 9500B should be set to 50 Ω, and a 50Ω
feedthrough termination need to be connected with the channel ofoscilloscope.
Test the bandwidth at 2 V/div、200 mV/div and 100 mV/div
Steps:
1. Connect channel 1 of the oscilloscope to the 9500B via the active head, as
shown in Figure 10.
2. Set the oscilloscope Volts/Div to 2 V/div, the Sec/Div to 50 ms/div, and set
BW Limit button to 20 MHz.
3. Press the Measure button on the front panel of the oscilloscope to display
Peak-Peak measurement.
4. Set amplitude of the 9500B to 5.5 V, and impedance to 50 Ω.
5. Set frequency of the 9500B to the frequency in Table 12. When testing at
200 mV/div or 100 mV/div set the start frequency to 100 kHz. When testingat 2 V/div set start frequency to 1 MHz.
Table 12 Frequency points in the test
Frequency Point (Hz)
100k,500k,1M,5M,10M,11M,12M,13M,14M,15M,16M,17M,18M,1
9M,20M,21M,22M,23M,24M,25M,26M,27M,28M,29M
6. Every time the frequency is changed, it is recommended to adjust the
Sec/Div to a proper value thus to display a complete waveform.
7. Record the Peak-Peak measurement value of the waveform.
8. Calculate the dB value at frequency point. If the value isn‟t in the range of(-3, 2) but the frequency is in the range of (12MHz, 28MHz), the Bandwidth
Limit of the oscilloscope pass. Else, test at next frequency point. When thetest finished, if none of the frequency points satisfy the requirement above,
the Bandwidth Limit of the oscilloscope fail.
9. Set the oscilloscope Volts/Div to the other settings and repeat the steps
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SDS1000X-E Service Manualfrom 2 to 8. Set amplitude of the 9500B to 600 mV when testing at 100
mV/div, and set to 1.2 V when at 200 mV/div.
10. Check the other channels in the same way as in steps1 to 9.
11. Disconnect the test connection.

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To Verify Trigger Sensitivity
This test checks trigger sensitivity at the frequency of 10 MHz and also at the
bandwidth frequency.
In the test, the impedance of 9500B should be set to 50 Ω, and a 50Ω
feedthrough termination need to be connected with the channel ofoscilloscope.
Table 13 Trigger sensitivity data
Volts/Div

Frequency

Trigger Range

100 mV/div
100 mV/div

10 MHzbandwidth

9.9~10.1 MHz
bandwidth± 1%

Steps:
1. Connect the selected channel of the oscilloscope to the 9500B, as shown in
Figure 10.
2. Set the oscilloscope Volts/Div to 100 mV/div, Sec/Div to 50 ns/div, coupling
mode to AC.
3. Set impedance of the 9500B to 50 Ω, frequency to 10 MHz, and amplitude
to 60 mV.
4. Set trigger slope of the oscilloscope to Positive.
5. Press Trigger Level knob to set the level to the center of the waveform.
6. Adjust the trigger level within the waveform range to achieve a stable
trigger.
7. Record the (hardware-measured) frequency which is on the top right of thescreen, and check that it is in the specified trigger range listed in Table 13.
8. Set the oscilloscope trigger slope to Negative, repeat steps 5 to 7.
9. Set frequency of the 9500B to the bandwidth frequency of the oscilloscope.
Set Sec/Div to 2 ns/div if you are testing SDS1204X-E/SDS1202X-E. Then
repeat steps 4 to 8.
10. Check the other channels in the same way as steps 1 to 9.
11. Disconnect the test connection.
The steps above are for testing the trigger level when using internal trigger
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using the analog input channels. The following steps are used to test the EXT
trigger sensitivity.
Steps:
1. Connect the ext trigger channel of the oscilloscope to the 9500B, as shownin Figure 14.
2. Set impedance of the 9500B to 50 Ω, amplitude to 200 mV, frequency to 10
MHz.
3. Set trigger source of the oscilloscope to EXT, trigger slope to Positive.
4. Press Trigger Level knob to set the level to the center of the waveform.
5. Adjust the trigger level within the range of [-100 mV, 100 mV] in order toachieve a stable waveform and then record the (hardware-measured)frequency, located at the top right of area of the screen.
6. Check if the frequency is within the specified trigger range listed in Table
13.
7. Set trigger slope to Negative, repeat steps 4 to 6.
8. Set frequency of the 9500B to the oscilloscope‟s bandwidth frequency,
amplitude to 300 mV. Repeat steps 3 to 7. In step 5, the range changes to[-150 mV, 150 mV].
9. Set frequency of the 9500B to 10 MHz, amplitude to 1 V.
10. Set the trigger source of the oscilloscope to EXT/5, trigger slope to Positive.
11. Press Trigger Level knob to set the level to the center of the waveform.
12. Adjust the trigger level within the range of [-500mV, 500mV] to achieve astable waveform and then record the hardware-measured value which is on
the top right of screen.
13. Check if the frequency is within the specified range listed in Table 13.
14. Set the trigger slope to Negative, repeat steps 11 to 13.
15. Set the frequency of the 9500B to the oscilloscope‟s bandwidth frequency,
amplitude to 1.5 V. Repeat steps 11 to 14.In step 6, the range changes to[-750 mV, - 750 mV].
16. Disconnect the test connection.

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To Verify Input ImpedanceThis test checks the input impedance of all analog channels and ext trigger
channel with different coupling modes and vertical scales (100 mV/div, 200
mV/div and 2 V/div).
Table 14 Input Impedance data
Coupling andChannel
impedance type

CH

Ext

Impedance Range

DC/1 MΩ

0.1V/div
1176000~1224000 Ω
0.2V/div,
980000~1020000 Ω
2V/div
980000~1020000 Ω

1 MΩ

980000~1020000 Ω

AC/1 MΩ

Steps:
1. Connect the selected channel of the oscilloscope to the 9500B, as shownin Figure 11.
2. Set the oscilloscope Volts/Div to 100 mV/div, coupling mode of the channel
to AC.
3. Press the „Aux‟ key at the right of the „OSCILLOSCOPE CALIBRATOR‟
panel of the 9500B and select the Load Resistance Measurement Function.
Record the reading displays on the screen of the 9500B.
4. Set coupling mode of the channel to DC. Record the reading displays on
the screen of the 9500B.
5. Check if the impedance is within the specified range in Table 14.
6. Test at 2 V/div and 200 mV/div, using the same procedure as steps 2 to 5.
7. Check the other analog channels in the same way as steps 1 to 6.
8. Disconnect the test connection

When checking the EXT trigger channel, it is the same as checking analog
channel. Record the reading displays on the screen of the 9500B, and check toverify it is within the specified range in Table 14.

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Disassembly ProceduresThis chapter describes how to remove major parts from the SDS1000X-E
series oscilloscope.

Safety Consideration and Cautions
Only qualified personnel should perform the disassembly procedures.
Disconnect the power before you begin to remove or replace the parts.
Otherwise, potential personal injuries or damages to the components may
occur.
WARNING!

WARNING!
CAUTION

HAZARDOUS VOLTAGES
Maintenance is performed with power supply on and without
protective covers. Only qualified personnel with proper tools
and protection should perform the maintenance. Perform themaintenance with power cord disconnected wheneverpossible.
AVOIDELECTRICALSHOCK
Hazardous voltages exist on the power supply module and
LCD module. To avoid electrical shock, disconnect the power
cord and wait at least three minutes for the capacitors todischarge before you begin disassembly.
ESD CAUTIONElectrostatic discharge (ESD) sensitive devices inside.
Electronic components may be damaged without detection.
Proper ESD precautions should be taken to avoid
performance degeneration or lose of functionality. As aminimum, place the oscilloscope on a properly grounded
ESD mat and wear a properly grounded ESD strap.

CAUTIONREMOVE POWER TO AVIOD DAMAGE
Remove power before you start to disassemble or replaceparts. DO NOT disassemble or replace parts with power on is
not allowed, or damage to the components may occurs.

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Tools Lists
Use these tools to remove or replace the modules in the oscilloscope:●Multifunction screwdriver●Antistatic gloves●Custom screw hexagonal nut tool or long nose pliers

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Disassembly ProceduresThis section describes how to remove the modules in the oscilloscope in detail.
To install the removed parts or replace a new part, follow the instructions inreverse order.

2-Channel Module
Removing the Front-Panel Knobs

Figure 15 Removing the front panel knobs
Removing steps:
Removing each front-panel knobs by firmly grasping the knob(with pliers
protected by a soft cloth to prevent scratches, if necessary) and pulling it awayfrom the front panel.

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Removing the Rear Cover

Figure 16 Removing the rear cover
Removing steps:
1. Placing the oscilloscope face down on a soft surface such as an anti-static
mat.
2. Removing the two PM3*10 screws on the rear panel. Removing the two
KM3*6screws under the tilt-legs in this same position.
3. Lifting the rear cover up and off carefully.

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Removing the Metal Shield

Top Metal Shield

Rear Metal Shield

Figure 17 Removing the top and rear metal cover
Removing steps:
1. Placing the oscilloscope face down on a soft surface such as an anti-static
mat.
2. Removing thetwoKM3*6screws onside of the rear metal shield.
3. Removing the rear metal shield.
4. Removing thetwoKM3*6screws on top of metal shield.
5. Removing the top metal shield.

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Removing the Power Supply Module and (Optionally) the FanPower Cord Connector
Power Supply Module

2*M4*8Figure 18 Removing the power supply module
Insulating Mat

Figure 19 Removing the insulating mat
Removing steps:
1. Removing the two M4*8 screws on the power cord connector.
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2. Disconnecting the power cable on the main board and the earth connecting
cable on the metal frame.
3. Removing the four PWM3*8 screws on the power supply module.
4. Removing the power supply module.
5. Removing the two PM3*6 on the insulating mat.
6. Disconnecting the cable of the fan on the main board.
7. Optionally removing the four KM3*32 screws and nuts on the fan andremoving the fan.

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Removing the Front Cover

Keyboard CableLCD Panel Cable

Figure 20 Removing the front cover
Removing steps:
1. Placing the oscilloscope back-side down on a soft surface such as ananti-static mat.
2. Disconnecting the keyboard cable and the LCD panel cable on the mainboard.
3. Removing the six PC3*8 screws on the metal frame.
4. Removing the front cover.

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Removing the Main board

Figure 21 Removing the BNC nuts and gaskets

Figure 22 Removing the main board
Removing steps:

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1. Removing the three BNC nuts and gaskets on the front side of the metalframe.
2. Removing the five PM3*6 screws on the main board.
3. Removing the main board.

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Removing the LCD and Keyboard
Master Keyboard

LCD Panel

Slave Keyboard

Figure 23 Removing the LCD panel and keyboard
Removing steps:
1. Disconnecting the cable between the master keyboard and slave keyboard.
2. Removing the seven PC3*8 screws on the master keyboard.
3. Removing the master keyboard.
4. Removing the six PC3*8 screws on the slave keyboard.
5. Removing the slave keyboard.
6. Removing the four screws and gaskets on the LCD panel.
7. Removing the LCD panel and the antiglare glass panel.

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4-Channel Module
Removing the Front-Panel Knobs

Figure 24 Removing the front panel knobs
Removing steps:
Removing each front-panel knob by firmly grasping the knob(with pliers
protected by a soft cloth to prevent scratches, if necessary) and pulling it awayfrom the front panel.

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Removing the Rear Cover

2*PM3*6

2*PM3*6

Figure 25 Removing the rear cover
Removing steps:
1. Placing the oscilloscope face down on a soft surface such as an anti-static
mat.
2. Removing the four PM3*6 screws located on the rear panel. Removing thetwo PM3*6screws under the tilt-legs in this same position.
3. Lifting the rear cover up and off carefully.

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Removing the Rear Metal Shield

Figure 26 Removing the rear metal shield
Removing steps:
1. Placing the oscilloscope face down on a soft surface such as an anti-static
mat.
2. Removing the BNC nut and gasket on the BNC connector.
3. Removing the seven PM 3*6 screws on side of the rear metal shield.
4. Optionally removing the two KM3*6 screws on the main power cordconnector if removing the connector is required.
5. Lifting the rear metal shield a little bit to have the access to disconnect thepower cable and fan cable on the main board. Be caution about the latchingtype power cable connector.
6. Removing the rear metal shield completely.

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Optionally Removing the Power Supply Module and the Fan

Figure 27 Removing the power supply module and the fan
Removing steps:
1. Disconnecting the main power cord cable on the power supply module.
2. Optionally removing the PWM3*8 screw and gasket of the earth connecting
cable on the rear metal cover if removing the main power cord connector isrequired.
3. Removing the six PC3*6 screws on the power supply module shield.
4. Removing the power supply module shield (without disconnecting the power
cable on the module since disconnecting the latching type connector is tricky
under the shield).
5. Disconnecting the power cable on the power supply module.

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6. Removing the four PC3*6 screws on the power supply module.
7. Removing the power supply module.
8. Optionally removing the four PM3*32 screws and nuts on the fan and thenremoving the fan.

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Removing the Front Cover

Keyboard CableLCD Panel Cable

Figure 28 Removing the front cover
Removing steps:
1. Placing the oscilloscope back-side down on a soft surface such as ananti-static mat.
2. Disconnecting the keyboard cable and the LCD panel cable on the mainboard.
3. Removing the six PC3*6 screws on the metal frame.
4. Removing the front cover.

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Removing the Main Board

Figure 29 Removing the BNC nuts and gaskets

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Figure 30Removing the main board
Removing steps:
1. Removing the four BNC nuts and gaskets on the front side of the metalframe.
2. Removing the twelve PM3*6 screws on the main Board.
3. Removing the main board.

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Removing the LCD and Keyboard

LCD Panel

Master Keyboard

Slave Keyboard

Figure 31 Removing the LCD panel and keyboard
Removing steps:
1. Disconnecting the cable between the master keyboard and slave keyboard.
2. Removing the eight PC3*8 screws on the master keyboard.
3. Removing the master keyboard.
4. Removing the five PC3*8 screws on the slave keyboard.
5. Removing the slave keyboard.
6. Removing the four screws and gaskets on the LCD panel.
7. Removing the LCD panel and the antiglare glass panel.

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Solving General Problems
This chapter contents suggestions for solving general problems.

If there is no display
Is the light of the power button glowing?
If yes:
Go to the Troubleshooting chapter and check the power supply modules andmain board.
If no:
Check that the power cord is secured in the power receptacle.
Check that the fuse in the power receptacle is not blew out.
Check that the power source is alive.
 If there is still no light glowing, go to the Troubleshooting chapter and checkthe power supply modules and main board.

If the display stuck at logo graph Remove all the USB FLASH drivers plugged into the oscilloscope andpower cycle the oscilloscope to try again.
 Wait ten minutes to see if the oscilloscope can boot successfully. If not,contact SIGLENT for further instructions. If is, try to upgrade to newest
firmware to solve the problem.
 If the display still stuck at logo graph, contact SIGLENT for further
instructions.

If there is no trace display
Check the acquisition is running and trigger status is Trig’d or Auto.
Check the horizontal time/division setting is reasonable and the acquisition
time is short enough for fast display.
 Disconnect associated channel input and recall the default setup following
the procedures in the User Guide.
Turn on the associated channel again and press Auto Setup key.
If there is still no trace displayed, contact SIGLENT for further instructions.

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If the baseline trace drift out of specification
 Check that the fan is running.
 Check that the vertical position setting is working.
 Do a self-calibration following the procedures in the User Guide.
If self-calibration does not work, contact SIGLENT for further instructions.

If there is an unexpected trace when no input
connected to channel input Power cycle the oscilloscope.
 Upgrade to newest firmware.
 Contact SIGLENT for further instructions.

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TroubleshootingThis chapter content information and procedures to troubleshooting general
hardware failures.

Safety Consideration and Cautions
Only qualified personnel should perform the troubleshooting procedures.
Disconnect the power cord whenever possible. DO NOT try to troubleshoot if
visible damage is detected on the power supply module and the main board,
return it to SIGLENT for further repair.
WARNINGHAZARDOUS VOLTAGES
Maintenance is performed with power supply on and without!
protective covers. Only qualified personnel with proper tools
and protection should perform the maintenance. Always
operate the oscilloscope with a three conductor power cable.
WARNINGAVOIDELECTRICALSHOCK
Hazardous voltages exist on the power supply module and!
LCD module. To avoid electrical shock, disconnect the power
cord and wait at least three minutes for the capacitors todischarge before you begin disassembly.
CAUTION
ESD CAUTIONElectrostatic discharge (ESD) sensitive devices inside.
Electronic components may be damaged without detection.
Proper ESD precautions should be taken to avoid
performance degeneration or lose of functionality. As aminimum, place the oscilloscope on a properly grounded
ESD mat and wear a properly grounded ESD strap.
CAUTIONREMOVE POWER TO AVIOD DAMAGE
Remove power before you start to disassemble or replaceparts. Do not disassemble or replace parts with power on s
not allowed, or damage to the components may occur.
CAUTION
USE AN EXTERNAL FANWhen you remove the oscilloscope metal shield, always use
an external fan to provide air flow over the heat sinks and themain board. The fan will be noneffective without the metalshield and over heat will occur on some components. The fan
will work properly if the back cover is removed but the metalshield remains, and no external fan is required in this case.
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Required equipment
Table 15 Required Equipment
Equipment
Critical Specifications

Recommended Model

Digital Multi-meter

Accuracy ±0.05%
1 mV resolution

SIGLENT SDM3065X
Agilent 34401A

Oscilloscope

200MHz BW
1MΩ impedance

SIGLENT SDS1204X-E

Troubleshooting Flowchart
The following flowchart descripts how to troubleshoot the oscilloscope ingeneral case. This does not guaranteed a 100% cover of all frequent hardware
failures. Contact SIGLENT if you cannot solve the problem.

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Begin

Test Power
Supply Module

Good?

NO

Replace Power
Supply Module

NO

Replace Main
Board

NO

Replace LCD

YESTest Main Board

Good?
YES

Test LCD

Good?
YES

End

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For 2-Channel Module
Main Board Drawing

Acquisition
SystemProcessor
System

Power
SupplyTo Check the Power Supply Module

Disconnect all the external cables and devices from the front and backpanel.
 Disconnect the power cord of the oscilloscope.
 Remove the rear cover and top and rear metal shield following the
instructions in chapter Disassembly Procedures. Note that the power supply
module is on the metal frame and you do not have to remove the power
supply module to check it.
 Disconnect the power cable to the main board.
 Reconnect the power cord to the receptacle of the power supply module.
Be caution about the power supply module without protective cover, highvoltage may exist on the heat sink and other exposed conductor.
 Measure the voltage list below on the power cable plug using a
multi-meter.
Table 16 Voltage parameters of the power supply module
Definition
Pin
Tolerance
Pin 1, Pin 5,
GND
NULL
Pin 8, Pin 12
Primary Power
Pin3, Pin 4+6.5 V𝐷𝐶 ± 10%
Positive Auxiliary Pin 6, Pin 7 +3.4V𝐷𝐶 ± 100mV𝐷𝐶
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Power 1
Positive Auxiliary
Pin 2Power 2
Negative
Pin9
Auxiliary PowerAC Line Trigger

Pin10

Reserved

Pin 11+15V𝐷𝐶 ± 10%-10V𝐷𝐶 ± 10%
2V𝑃𝑃 ± 20%
This will only affect AC Line
Trigger function.
Don‟t care (not used in thisoscilloscope).

Figure 32 Pin definition of the power cable plug

To Check the Main Board

It is recommended that to remove the main board from the metal frame
and re-assemble the power supply module to the metal frame for easy
accessing to the test points and safety considerations. Follow the
instructions in chapter Disassembly Procedures.
Reconnect the power cable to the main board after you have confirmedthat the power supply module is in good condition.
Power up the main board either by pushing the front panel power button orby causing a short duration short circuit on the pin 2 and pin 3 of the J43
near U132 if you have disconnected the keyboard cable on the mainboard.

Short on thetwo pinsIn most case, you can hear the relays click if the main board power up
successfully. If you cannot hear the click or there is no sign that the mainboard is powering up, go to the To Check Other Power Supplies section firstto check the stand-by power and the main power.
If the power or the signal under test is abnormal, replace the main board.

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To Check the Processor System
Check the processor power supplies
 Locate the Power Supply section. Find and measure those test points
using a multi-meter.
TP78
DVCC3V3_ZYNQ
TP47
DVCC1V5_ZYNQ

TP46
DVCC1V8_ZYNQ
TP79
DVCC2V5_ZYNQ
C18/C23
DVCC1V0_ZYNQ

Figure 33 Test points for the processor power supplies
Table 17 Voltage parameters of the processor power supplies
Net Name
Test Point Tolerance
DVCC1V0_ZYNQ C18/C23+1.0 V𝐷𝐶 ± 50mV𝐷𝐶
DVCC1V8_ZYNQ TP46
+1.8 V𝐷𝐶 ± 50mV𝐷𝐶
DVCC1V5_ZYNQ TP47
+1.5 V𝐷𝐶 ± 50mV𝐷𝐶
DVCC3V3_ZYNQ TP78
+3.3 V𝐷𝐶 ± 100mV𝐷𝐶
DVCC2V5_ZYNQ TP79
+2.5 V𝐷𝐶 ± 100mV𝐷𝐶

Check the clock

Locate the three oscillators X1, X2 and X3, use an oscilloscope tomeasure the clock signal using the method below.
R372

R334

R371
R229
R205
R89

Figure 34 Test points for clock

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Table 18 Clock parameters of the Processor System
Test
Frequency Tolerance
Clock Domain
Level
Point
33.333333 MHz ±R334
Processor Reference LVCMOS33
50PPM
24.000000 MHz ±R372
USB Host Reference LVCMOS33
50PPM
USB
Device24.000000 MHz ±R371
LVCMOS33
Reference
50PPM
25.000000 MHz ±R205
Ethernet Reference
LVCMOS33
50PPM
Acquisition
System25.000000 MHz ±R229
LVCMOS33
Clock
25PPM
25.000000 MHz ±R89
PLL Reference Clock LVCMOS33
25PPM

To Check the Acquisition System
Check the Acquisition System power supplies


Locate the Acquisition System power supplies section. Find andmeasure those test points using a multi-meter.
TP75
AVCC5V0

TP70
AVCC1V9_ADC

TP80
AVCC5V0_VGA
TP72
AVEE-5V0

TP76
AVCC3V3

Figure 35 Test points for the Acquisition System power supplies section
Table 19 Voltage parameters of the Acquisition System power supplies
Net Name
Test Point Tolerance
AVCC1V9_ADC TP70
+1.9V𝐷𝐶 ±50mV𝐷𝐶
AVCC3V3
TP76+3.3 V𝐷𝐶 ± 100mV𝐷𝐶
AVCC5V0_VGA TP80
+5.0 V𝐷𝐶 ± 100mV𝐷𝐶
AVCC5V0TP75+5.0 V𝐷𝐶 ± 100mV𝐷𝐶
AVEE-5V0
TP72-5.0 V𝐷𝐶 ± 200mV𝐷𝐶
Check the clock

Locate the oscillator X4, use an oscilloscope to measure the clock
signal using the method below.
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R229

R89

Figure 36 Test points for clock
Table 20 Clock parameters of the Acquisition System
Test
Frequency Tolerance
Clock Domain
Level
Point
Acquisition
System25.000000 MHz ±R229
LVCMOS33
Clock
25PPM
25.000000 MHz ±R89
PLL Reference Clock LVCMOS33
25PPM

To Check Other Power Supplies
Check other power supplies


Find and measure those test points using a multi-meter.
L63
VCC6V5Q33
VCC15V0
J12
FAN_PWR

Q34
AVEE-10V0
TP77
VCC5V0Figure 37 Test points for other power supplies
Table 21 Voltage parameters of other power supplies
Test
Comments
Net Name
Tolerance
PointStand-by power for power on+5 V𝐷𝐶±VCC5V0TP77
circuits and power source for
100mV𝐷𝐶USB host VBUS
+6.5 VDC ± Main power
VCC6V5
L63
10%
FAN_PWR J12
Power supply for fan-10VDC ±10%
Positive power supply for TDC
VCC15V0Q33+15VDC ±10%circuits
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AVEE-10V0 Q34-10 VDC ±10%

Negative power
analog circuits

supplyfor

To Check the LCDReconnect the power cable to the main board after you have confirmedthat the power supply module is in good condition.
Connect the LCD cable to the main board.
Power up the main board either by pushing the front panel power button orby causing a short duration short circuit on the pin 2 and pin 3 of the J43
near U132 if you have disconnected the keyboard cable on the mainboard.
To Check the LCD Power Supply

Find and measure those test points using a multi-meter.
ZC16
VLEDP_LCD

D13
VEE-6V8_LCD
D12
VCC16V_LCD
C134
VCC10V4_LCD

Figure 38 Test points for the LCD power supplies
Table 22 Voltage parameters of the LCD power supplies
Test
Net Name
Tolerance
Point+10.4 V𝐷𝐶 ±VCC10V4_LCD C134
10%
+16 V𝐷𝐶±
VCC16V_LCD D1210%-6.8 V𝐷𝐶±
VEE-6V8_LCD D13
10%+6.5V𝐷𝐶 ~ +20
VLEDP_LCD
ZC16V𝐷𝐶 If the power supply is abnormal, replace the main board.
To Check the LCD Signal


Locate resistors array between U30 and U34, use an oscilloscope tomeasure the signal using the method below.

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SDS1000X-E Service ManualJ19.pin11
LCD_HSYNC

TP36
LCD_DCLK

J19.pin10
LCD_VSYNC

Figure 39 Test points for LCD signal
Table 23 Signal parameters of the LCD
Test Point Signal
Level
Frequency Tolerance
R420
LCD_DCLKLVCMOS33 27.5 MHz ± 1%
R422
LCD_VSYNC LVCMOS33 50 Hz ± 1%
R423
LCD_HSYNC LVCMOS33 26 kHz ± 1%
 If the signal is good, replace the LCD panel.
 If the signal is dead, replace the main board.

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For 4-Channel Module
Main Board Drawings

Processor
Processor PowerPower
SupplySupplyProcessor
System

Power
SupplyAcquisition
SystemTo Check the Power Supply Module

Disconnect all the external cables and devices from the front and backpanel.
 Disconnect the power cord of the oscilloscope.
 Remove the rear cover and rear metal shield following the instructions inchapter Disassembly Procedures. Note that the power supply module is on
the rear metal shield and you do not have to remove the power supply
module to check it.
 Disconnect the power cable and fan cable to the main board. Leave thepower cable connected on the power supply module to have an easy
access to the test points.
 Reconnect the power cord to the receptacle of the power supply module.
 Measure the voltage list below on the power cable plug using a
multi-meter.
Table 24 Voltage parameters of the power supply module
Cable
Definition
Pin
Tolerance
Color
Pin 4, Pin5,
GND
Black
NULL
Pin 6
Primary PowerPin 1, Pin 2 Red+6.5 V𝐷𝐶 ± 10%
Positive Auxiliary Pin 8
Blue+15 V𝐷𝐶 ± 10%
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Power
AC Line Trigger

Pin 7

Brown

Negative Auxiliary
Pin 3
Power

Orange2V𝑃𝑃 ± 20%
This will only affect AC Line
Trigger function.
-9.5 V𝐷𝐶 ± 10%
Don‟t care (not used in thisoscilloscope).

Figure 40 Pin definition of the power cable plug

To Check the Main Board

Reconnect the power cable to the main board after you have confirmedthat the power supply module is in good condition.
There are no user accessible test points on the bottom side of the mainboard, so you do not have to remove the main board completely. Leave themain board on the main metal frame with front cover, keyboard and LCD.
Power up the main board either by pushing the front panel power button orby causing a short duration short circuit on the two pads of J22 beside thepower cable receptacle J2 if you have disconnected the keyboard cable on
the main board.
Short on the two pads

In most case, you can hear the relays click if the main board power up
successfully. If you cannot hear the click or there is no sign that the mainboard is powering up, go to the To Check Other Power Supplies section firstto check the stand-by power and the main power.
If the power or the signal under test is abnormal, replace the main board.

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To Check the Processor System
Check the processor power supplies


Locate the Processor power supplies section. Find and measure thosetest points using a multi-meter.
TP7
DVCC3V3_ZYNQ

TP4
DVCC1V0_ZYNQ

TP23
DVCC5V5_ZYNQ
TP5
DVCC1V8_ZYNQ

TP6
DVCC1V5_ZYNQ

Figure 41 Test points for the processor power supplies
Table 25 Voltage parameters of the processor power supplies
Net Name
Test Point Tolerance
DVCC1V0_ZYNQ TP4+1.0 V𝐷𝐶 ± 50mV𝐷𝐶
DVCC1V8_ZYNQ TP5+1.8 V𝐷𝐶 ± 50mV𝐷𝐶
DVCC1V5_ZYNQ TP6+1.5 V𝐷𝐶 ± 50mV𝐷𝐶
DVCC3V3_ZYNQ TP7+3.3 V𝐷𝐶 ± 100mV𝐷𝐶
DVCC2V5_ZYNQ TP23
+2.5 V𝐷𝐶 ± 100mV𝐷𝐶
Check the clock

Locate the three oscillators X1, X2 and X3, use an oscilloscope tomeasure the clock signal using the method below.
R206

R207

R204

R208
R209

R205
R203

Figure 42 Test points for clock
Table 26 Clock parameters of the Processor System
Test
Frequency Tolerance
Clock Domain
Level
Point
33.333333 MHz ±R203
Processor Reference LVCMOS33
50PPM
R204
USB Host Reference LVCMOS33 24.000000 MHz ±80

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R205

USB
Reference

DeviceR206

USB Hub Reference

LVCMOS33

R207

Ethernet Reference

LVCMOS33

R208

Acquisition
Clock

LVCMOS33

R209

PLL Reference Clock

System

LVCMOS33

LVCMOS33

50PPM
24.000000
50PPM
24.000000
50PPM
25.000000
50PPM
25.000000
25PPM
25.000000
25PPM

MHz

±

MHz

±

MHz

±

MHz

±

MHz

±

To Check the Acquisition System
Check the Acquisition System power supply


Locate the Acquisition System power supplies section. Find andmeasure those test points using a multi-meter.

TP19
VCC1V8_ADC1

TP18
VCC1V8_ADC0

TP15
AVCC3V3

TP17
AVEE-5V0
TP13
AVCC5V0_VGA

TP12
AVCC5V0

Figure 43 Test points for the Acquisition System power supplies section
Table 27 Voltage parameters of the Acquisition System power supplies
Net Name
Test Point Tolerance
VCC1V8_ADC0 TP18
+1.8V𝐷𝐶 ± 50mV𝐷𝐶
VCC1V8_ADC1 TP19
+1.8 V𝐷𝐶 ± 50mV𝐷𝐶
AVCC3V3
TP15+3.3V𝐷𝐶 ± 100mV𝐷𝐶
AVCC5V0_VGA TP13
+5.0V𝐷𝐶 ± 100mV𝐷𝐶
AVCC5V0TP12+5.0V𝐷𝐶 ± 100mV𝐷𝐶
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AVEE-5V0-5.0V𝐷𝐶 ± 200mV𝐷𝐶

TP17Check the clock

Locate the oscillatorX3, use an oscilloscope to measure the clock
signal using the method below.

R208
R209

Figure 44 Test points for clock
Table 28 Clock parameters of the Acquisition System
Test
Frequency Tolerance
Clock Domain
Level
Point
Acquisition
System25.000000 MHz ±R208
LVCMOS33
Clock
25PPM
25.000000 MHz ±R209
PLL Reference Clock LVCMOS33
25PPM

To Check Other Power Supplies
Check other power supplies


Find and measure those test points using a multi-meter.

TP22
VCC3V3_PWR
TP16
DVCC5V0_USB

TP25
VCC6V5J18
FAN_PWR

TP14
VCC6V5_MSO

TP21
VEE-6V5

Figure 45 Test points for other power supplies
Table 29 Voltage parameters of other power supplies
Net Name
TestTolerance
Comments
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Point
VCC3V3_PWR

TP22

VCC6V5TP25

FAN_PWR

J18

VEE-6V5

TP21

DVCC5V0_USB TP12VCC6V5_MSO

TP14+3.3 V𝐷𝐶
100mV𝐷𝐶+6.5 V𝐷𝐶
10%+12 V𝐷𝐶
1V𝐷𝐶-6.5 V𝐷𝐶
10%+5.0 V𝐷𝐶
100mV𝐷𝐶+6.5 V𝐷𝐶
10%± Stand-by power for power on
circuits± Main power± Power supply for fan± Negative power supply foranalog circuits± Power source for USB host
VBUS
Power supply for SBUS,±
measuring near 0 V if no
SBUS-Device is inserted

To Check the LCDReconnect the power cable to the main board after you have confirmedthat the power supply module is in good condition.
Do not remove the main board completely. Leave the main board on themain metal frame with front cover, keyboard and LCD connected.
Power up the main board either by pushing the front panel power button orby causing a short duration short circuit on the two pads of J22 beside thepower cable receptacle J2 if you have disconnected the keyboard cable on
the main board.
To Check the LCD Power Supply

Find and measure those test points using a multi-meter.
TP9
VLEDP_LCD
TP11
VCC10V4_LCD

TP8
VEE-6V8_LCD

TP10
VCC16V_LCD

Figure 46 Test points for the LCD power supplies
Table 30 Voltage parameters of the LCD power supplies
Test
Net Name
Tolerance
Point
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SDS1000X-E Service Manual+10.4 V𝐷𝐶 ±10%+16 V𝐷𝐶±
VCC16V_LCD TP10
10%
VEE-6V8_LCD TP8-6.8V𝐷𝐶 ± 10%+6.5V𝐷𝐶 ~ +20
VLEDP_LCD
TP9
V𝐷𝐶
If the power supply is abnormal, replace the main board.
VCC10V4_LCD TP11

To Check the LCD Signal


Locate resistors array between U30 and U34, use an oscilloscope tomeasure the signal using the method below.

R420
LCD_DCLKR423
LCD_HSYNC

R422
LCD_VSYNC

Figure 47 Test points for LCD signal
Table 31 Signal parameters of the LCD
Test Point Signal
Level
Frequency Tolerance
R420
LCD_DCLKLVCMOS33 27.5 MHz ±1%
R422
LCD_VSYNC LVCMOS33 50 Hz ±1%
R423
LCD_HSYNC LVCMOS33 26kHz ±1%
 If the signal is good, replace the LCD panel.
 If the signal is dead, replace the main board.

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SDS1000X+ Series
Digital Oscilloscope

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