SIGLENTSDS2000X-E Series
Digital Oscilloscope
Service Manual
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 and prevent damages
to this product or any products connected to it. To avoid potential hazards, use thisproduct 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 product andapproved by your local governing agencies.
Avoid Electric Shock. To avoid injuries or potential loss of life, do not connect ordisconnect probes or test leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the protective ground conductorof the power line. To avoid electric shock, the grounding conductor must be connectedto 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 a high voltage
since it has the isobaric electric potential as ground.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings andmarkings 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 with covers or panels
removed.
Avoid Circuit or Wire Exposed. Do not touch exposed junctions and components
when the unit is powered.
Do Not Operate With Suspected Problems. If you suspect damage has occurred tothis 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 theinstrument 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:

SDS2000X-E Service ManualContents
General Safety Summary ................................................................................................... III
General Features ................................................................................................................. 7
Prepare Information ............................................................................................................. 9
Functional checking ...................................................................................................... 9Power-on Inspection ............................................................................................. 9
Probe Compensation .......................................................................................... 10
Auto Setup ........................................................................................................... 11
Self Calibration .................................................................................................... 12Interface Test .............................................................................................................. 12
USB Host Test..................................................................................................... 13
USB Device Test ................................................................................................. 13
LAN Port Test ...................................................................................................... 15
Pass/Fail out Test................................................................................................ 17
Performance Test .............................................................................................................. 19
To Verify DC Gain Accuracy ...................................................................................... 23
To Verify Offset Accuracy ........................................................................................... 25
To Verify Time Base Accuracy ................................................................................... 27
To Verify Trigger Delay............................................................................................... 27
To Verify Ext Trigger Delay ........................................................................................ 28
To Verify Ext Trigger Level ......................................................................................... 29
To Verify Noise Floor .................................................................................................. 30
To Verify Bandwidth ................................................................................................... 31
To Verify Bandwidth Limit ........................................................................................... 32
To Verify Trigger Sensitivity ....................................................................................... 33
To Verify Input Impedance ......................................................................................... 35
Disassembly Procedures ................................................................................................... 36
Safety Consideration and Cautions ............................................................................ 36
Tools Lists................................................................................................................... 36
Disassembly Procedures ............................................................................................ 37
To Remove the Front-Panel Knobs .................................................................... 37
To Remove the Rear Cover ................................................................................ 38
To Remove the Rear Metal Shield ...................................................................... 39
To Remove the Power Supply Module and the Fan ........................................... 40
To Remove the Front Cover................................................................................ 41
To Remove the Main Board ................................................................................ 42
To Remove the LCD and Keyboard .................................................................... 44
Solving General Problems ................................................................................................. 45
If there is no display.................................................................................................... 45
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If the display stuck at logo graph ................................................................................ 45
If there is no trace display .......................................................................................... 45
If the baseline trace drift out of specification .............................................................. 45
If there is an unexpected trace when no input connected to channel input ............... 46
Troubleshooting ................................................................................................................. 47
Safety Consideration and Cautions ............................................................................ 47
Required equipment ................................................................................................... 47
Troubleshooting Flowchart ......................................................................................... 48
Main Board Drawings ................................................................................................. 49
To Check the Power Supply Module .......................................................................... 49
To Check the Main Board ........................................................................................... 50
To Check the Processor System ................................................................................ 50
To Check the Acquisition System............................................................................... 52
To Check Other Power Supplies ................................................................................ 53
To Check the LCD ...................................................................................................... 53
Contact SIGLENT .............................................................................................................. 56

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SDS2000X-E Service Manual

General Features
SIGLENT’s new SDS2000X-E Super Phosphor Oscilloscopes are available in two
bandwidths, 200MHz and 350MHz, a single ADC with a 2GSa/s maximum sample rate,
and a single memory module with 28Mpts of sample memory. When two channels areenabled, each channel has sample rate of 1GSa/s and a standard record length of 14Mpts.
When only a single channel per ADC is active, the maximum sample rate is 2GSa/s andthe maximum record length is 28Mpts. The most commonly used functions can beaccessed with its user- friendly front panel design.
The SDS2000X-E series employs a new generation of SPO (Super-Phosphor
Oscilloscope) technology that provides excellent signal fidelity and performance. The
system noise is also lower than similar products in the industry. It comes with a minimum
vertical input range of 500uV/div, an innovative digital trigger system with high sensitivity
and low jitter, and a waveform capture rate of 400,000 frames/sec (sequence mode). The
SDS2000X-E also employs a 256 -level intensity grading display function and a color
temperature display mode not found in other models in this class. SIGLENT’s latest
oscilloscope offering supports multiple powerful triggering modes including serial bus
triggering. Serial bus decoding for IIC,SPI,UART,CAN,LIN bus types is included. The
SDS2000X-E also include History waveform recording, and sequential triggering thatenable extended waveform recording and analysis. Another powerful addition is the new
1million point FFT math function that gives the SDS2000X-E very high frequency
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
SDS2000X-E cannot be matched anywhere else in this price class.
The SDS2000X-E includes even more functions, including: searching and 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
Model
Bandwidth

SDS2202X-E
SDS2352X-E
200 MHz

350 MHzA single 2GSa/s ADC. When two channels are enabled, each
Sampling Rate(Max.)

channel has a maximum sample rate of 1GSa/s. When asingle channel per pair is active, that channel has sample rateof 2GSa/s

Channels
Memory Depth(Max.)

2+EXT
14Mpts/CH(non-interleave mode);
28Mpts/CH(interleave mode)⚫ 200MHz, 350MHz bandwidth models
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SDS2000X-E Service Manual⚫ Have one 2GSa/s ADC. When all channels are enabled, each channel has a maximum
sample rate of 1GSa/s. When a single channel per ADC is active, it has sample rate of
2GSa/s⚫ The newest generation of SPO technology⚫ Waveform capture rate up to 110,000wfm/s (normal mode), and 400,000wfm/s(sequence mode)⚫ Supports 256-level intensity grading and color display modes⚫ Record length up to 28Mpts⚫ Digital trigger system⚫ Intelligent trigger: Edge, Slope, Pulse Width, Window, Runt, Interval, Time 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 avery small dead time segment to capture the qualifying 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 Reference functions⚫ 1Mpts FFT⚫ Math and measurement functions use all sampled data points (up to 28Mpts)⚫ 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) (Option)⚫ Bode plot
⚫ Search and navigate⚫ USB AWG module (Option)⚫ USB WIFI adapter(Option)⚫ Web Browser based control⚫ 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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Prepare Information
Before initiating performance verification or any adjustments, it is recommended 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 the oscilloscopeis 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 to connect the oscilloscope tothe power source.

PowersocketFigure 1 Connect power cord
Note: To avoid electric shock, make sure that the instrument is correctly
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 thatseveral oscilloscope keys will be lighted for about 6 seconds simultaneously, until the bootscreen appears. The oscilloscope will then begin to perform its power-on tests

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SDS2000X-E Service Manualautomatically, after which the Default button can be pressed in order to recall the factory
default settings.

Probe Compensation
It is necessary to compensate the probe at first use so as to properly match the probe 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, andthen use the probe to connect CH1 BNC input connector to the Compensation Signal
Output Terminal.

Ground Terminal
Compensation Signal Output Terminal

3. Press Auto Setup.
4. Observe waveform on the screen. The displaying should be a square waveform asshown in the figure below:

Under
CompensatedCompensated

Over

Correctly

Compensated

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

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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 8mV.
⚫ Select the channel with the lowest frequency when several channels are connected tosignals.

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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 perform self-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 the self-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 will appear:“Press Run/Stop key to exit”. Press the Run/Stop button on the front panel to exit thecalibration interface.

Interface Test
The SDS2000X-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 theoscilloscope is operating properly it is recommended that the user first test the interfaces.

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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 of theoscilloscope.
2. A message prompt “USB Flash Drive Detected.” appears on the screen, and an icon will
be shown in the lower right corner of the screen which confirms the U disk has beensuccessfully recognized.

Figure 4 USB drive in interface

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.
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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 is displayed.

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 the following
instructions.
2. Press Utility

NextPage2/4

I/O

LAN

IP Set, input usable IP Address andSubnet Mask.

Figure 5 IP Setting interface
3. Connect the oscilloscope to the computer using a LAN cable via the LAN interface
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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5. Click “Open VISA Test Panel” option button, which then displays the following interface(below). Then click the “Input/Output” option button and click the “Query” option button.
The Read operation information will be displayed.

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SDS2000X-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 SDS2000X-E oscilloscope.
2. Enable Channel 1.
3. Press Utility

Next Page2/4

Pass/Fail, set the submenu items under Pass/Failmenu as below:
Table 2 Pass/Fail submenu items
Submenu

Setting

Enable Test

On

SourceCH1

Msg Display

On

Mask setting
X Mask

0.32div

Y Mask

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, the SDS2000X-E
screen will appear as in Figure 6:

Figure 6 Pass/Fail Waveform
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If the waveform is within the range that was set under Mask menu setting, the waveform
displayed on the screen will Pass. If any part of the trace falls outside the Mask area thenit will Fail.
4. Connect the Pass/Fail output signal (on the rear panel) to the input terminal of anotheroscilloscope.
5. Move the waveform on the screen up, down, or sideways so that any portion of it falls
outside of the Pass/Fail mask. If the interface is operating normally then a pulse willappear on the second oscilloscope (Figure 7). Adjust the second oscilloscope’s timebase and voltage scale as needed. If there is no viewable pulse on the second
oscilloscope then there may be a problem with this function.

Figure 7 Pulse Waveform

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

Description

Test itemDCG\Offset\ Clockaccuracy\Trigger delay

Fluke 9500B + Active Heads

High Performance\BW\BWL\trigger

Oscilloscope Calibrator

sensitivity\ Input
impedance\ Ext Trigger
delay\Ext Trigger level

GPIB Card and Cable

For communication between
the computer and the 9500B
For communication between

USB Cable

the computer and the
SDS2000X-E
BNC(m) to BNC(m),BNC Cables

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 theoscilloscope under test (Table 3):

9500B

GPIB

USB

SDS2000X-E
SDS2000X-E
CH
1

CH1

CH
2

PC

BNC CABLE

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Figure 8 Connecting test instruments for DCG\Offset

9500B

GPIB

SDS2000X-E

USB

CH
1

CH1

CH
2

PC

BNC CABLE

Figure 9 Connecting test instruments for Clock\Trigger Delay

9500B

GPIB

SDS2000X-E

USB

CH
1

CH1

CH
2

PC

BNC CABLE

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

9500B

GPIB

USB

SDS2000X-E
CH
1

CH1

CH
2

EXT

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
SDS2000X-E for Ext Trigger test:

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9500B

GPIB

USB

CH
1

CH2

CH1

SDS2000X-E
CH
2

EXT
50ohm

PC
BNC CABLE

Figure 12 Connecting test instruments for Ext Trigger Delay

9500B

GPIB

USB

SDS2000X-E
CH
1

CH1

CH
2

EXT

PC

BNC CABLE

Figure 13 Connecting test instruments for Ext Trigger Level

9500B

GPIB

USB

SDS2000X-E
CH
1

CH1
PC

CH
2

EXT
50ohm

BNC CABLE

Figure 14 Connecting test instruments for Ext Trigger Sensitivity

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

Self Calibration

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The Self Calibration procedure is described in Chapter "Self Calibration". If theenvironmental temperature changes by more than 5℃, the Self Calibration operation mustbe 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 the measurement.
This test verifies non-interleave mode 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 Figure 8.
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 valueof the oscilloscope as Vmean.
5. Calculate Verror(Verror=VSetting－Vmean),and set the next output level as step 4.
6. Makealinearregression

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
DC voltage output levels

DC Gain Accuracy

10 V/div

30 V,15V ,0,-15 V,-30 V

error
±3%

5 V/div

15 V, 7.5 V,0,-7.5 V,-15 V±3%

2 V/div

6 V,3 V,0,-3 V,-6 V±3%

1 V/div

3 V,1.5 V,0,-1.5 V,-3 V±3%500 mV/div

1.5 V, 0.75 V,0,-0.75 V,-1.5 V±3%200 mV/div

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

100 mV/div

300 mV,150 mV,0,-150 mV,-300 mV±3%

50 mV/div

150 mV,75 mV,0,-75 mV,-150 mV±3%

20 mV/div

60 mV,30 mV,0,-30 mV, -60 mV±3%

10 mV/div

30 mV,150 mV,0,-150 mV,-30 mV±3%

5 mV/div

15 mV,7.5 mV,0,-7.5 mV-15 mV±3%

2 mV/div

6 mV, 3 mV,0,-3 mV, -6 mV±4%Volt/Div±3%

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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 the measurement.
This test verifies interleave mode DC Gain Accuracy of all channels.
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 ns/div. Only turn on channel 1.
4. Set Volts/Div of the oscilloscope to 100 mV/div. Press the Measure button on the front
panel of the oscilloscope to display Mean measurement.
5. Set DC voltage output level of the 9500B according to 5, and record mean value of theoscilloscope as Vmean.
6. Calculate Verror(Verror=VSetting－Vmean),and set the next output level as step 4.
7. Makealinearregression

with

these

5

data

points:VSetting1~VSetting5,

Verror1~Verror5. Check if the slope falls within the range shown in Table 5.
8. Set the oscilloscope Volts/Div to the other settings in Table 4, and repeat steps 4 to 7.
9. Turn on channel 2 and turn off channel 1, and repeat steps 8.
10. Turn the 9500B output off.
11. Disconnect the connection to all the channels.
Table 6 DC Gain Accuracy in Different Sampling Rate
Volt/DivDC voltage output levels

DC GainAccuracy

100mV/div

300 mV,150 mV,0,-150 mV,-300 mV V,-1.5±3%50mV/divV
150 mV,75 mV,0,-75 mV,-150
mV V,-1.5 V±3%20mV/div

60 mV,30 mV,0,-30 mV, -60 mV±3%

10mV/div

30 mV,150 mV,0,-150 mV,-30 mV

±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 non-interleave mode 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 theoscilloscope to display Mean measurement.
4. According to Table 7, set offset of the channel to -Offset, and set the 9500B output levelto equal the offset, then record the mean value of the oscilloscope as Vmean. When theoffset is 0, set the 9500B output to off and record the mean value of the oscilloscope as
Vzero.
5. Calculate Offseterror (Offseterror= Vmean - Offset), and adjust the 9500B to the output levelas step 4.
6. Makea linear regression withthese

5 datapoints: Offseterror1~Offseterror5,

Offsetout1~Offsetout5. Check to verify that the slope is within the limits specified in Table
7.
7. Check to verify that abs(Vzero) in step 4 is within the limits specified in Table 7.
8. Set the oscilloscope Volts/Div to the other settings in Table 7, and repeat the steps 4 to
6.
9. Turn the 9500B output off.
10. Disconnect the connection to all the channels.
Table 7 Offset Accuracy
Volt/Div

Offset

Slope

Zero

error

input(V)

10 V/div

35 V,30 V,0,-3 0V,-35 V±1.5%±1.202

5 V/div

30 V,25 V,0,-25 V,-30 V±1.5%±0.602

2 V/div

20 V,10 V,0,-10 V,-20 V±1.5%±0.242

1 V/div

10 V,5 V,0,-5 V,-10 V±1.5%±0.122500 mV/div

5 V,2.5 V,0,-2.5 V,-5 V±1.5%±0.062200 mV/div

2 V,1 V,0,-1 V,-2 V±1.5%±0.026

100 mV/div

1 V,0.5 V,0,-0.5 V,-1 V±1.5%±0.01450 mV/div

500 mV,250 mV,0,-250 mV,-500 mV±1.5%±0.00825

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SDS2000X-E Service Manual±1.5%±0.0044

100 mV, 50 mV,0,- 50 mV,-100 mV±1.5%±0.0032

5 mV/div

50 mV,25 mV,0,-25 mV,-50 mV±1.5%±0.0026

2 mV/div

20 mV, 10 mV,0,-10 mV, -20 mV±1.5%±0.00224

20 mV/div

200 mV,100 mV,0,-100 mV,-200 mV

10 mV/div

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 interleave mode 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 oscilloscope Sec/Div to 200 ns/div. Only turn on channel 1.
4. Set the Volts/Div of channel to 10 mV/div. Press Measure button on the front panel ofthe oscilloscope to display Mean measurement.
5. According to Table 7, set offset of the channel to -Offset, and set the 9500B output levelto equal the offset, then record the mean value of the oscilloscope as Vmean. When theoffset is 0, set the 9500B output to off and record the mean value of the oscilloscope as
Vzero.
6. Calculate Offseterror (Offseterror= Vmean - Offset), and adjust the 9500B to the output levelas step 4.
7. Makea linear regression withthese

5 datapoints: Offseterror1~Offseterror5,

Offsetout1~Offsetout5. Check to verify that the slope is within the limits specified in Table
7.
8. Check to verify that abs(Vzero) in step 4 is within the limits specified in Table 7.
9. Set the oscilloscope Volts/Div to the other settings in Table 7, and repeat the steps 4 to
8.
10. Turn on channel 2 and turn off channel 1, and repeat the steps 9.
11. Turn the 9500B output off.
12. Disconnect the connection to all the channels
Table 7 Offset Accuracy
Volt/Div

Offset

100 mV/div

1 V,0.5 V,0,-0.5 V,-1 V

50 mV/div

500 mV,250 mV,0,-250 mV,-500 mV

20 mV/div

200 mV,100 mV,0,-100 mV,-200 mV

10 mV/div

100 mV, 50 mV,0,- 50 mV,-100 mV

Slope

Zero

error

input(V)±1.5%±0.014±1.5%±0.008±1.5%±0.0044±1.5%±0.0032

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To Verify Time Base Accuracy
This test verifies the time base accuracy of the oscilloscope. In the test, the impedance ofboth the 9500B and the oscilloscope should be set to 1 MΩ.
Time Base Accuracy: Frequency Error < 100 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 50ms/div.
4. Set the Memory Depth to 28Mpts, and the sample rate will be automatically set to
40MSa/s.
5. Disable the Roll mode if it is enabled.
6. Set waveform of the 9500B to sine, amplitude to 600 mV, and frequency to the value(40MHz) 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 100 Hz.
9. Disconnect the test connection.

To Verify Trigger Delay
This test checks the trigger delay of the analog channels. In this test, the impedance ofboth 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, andwaveform 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@Levelmeasurement.
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 the oscilloscope 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, and the trigger
level to 0.
7. Press Measure button on the front panel of the oscilloscope to display Delaymeasurement.
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, the impedance ofboth the 9500B and the oscilloscope should be set to 1 MΩ.
Table 8 EXT Trigger Level data
Trigger
ChannelVolt/div

EXT

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, andwaveform 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, and coupling 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, andthe 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 from models. In thistest, do not connect any testing devices to the oscilloscope.
Table 9 Noise Floor Limited Range
pkpk/stdev

SNR

pkpk/stdev

SNR

LimitedLimitedLimitedLimited

Range

Range

Range

Range

500 uV

[1,12][25,55]

100 mV

[1,12][38,55]

1 mV[1,12][25,55]200 mV

[1,12][38,55]2 mV[1,12][27,55]500 mV

[1,12][38,55]5 mV[1,12][31,55]

1V[1,12][38,55]10 mV[1,12][35,55]2V[1,12][38,55]20 mV[1,12][38,55]5V[1,12][38,55]50 mV[1,12][38,55]

10 V[1,12][38,55]Volt/Div

Volt/Div

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 andPeak-Peak measurement.
8∗vdiv

4. Calculate SNR (SNR =20 ∗ log10 2∗√2∗stdev), pkpk/stdev.
5. Check if the SNR and pkpk/stdev are in the limited range shown in Table 9.
6. Check the other analog channels in the same way as steps 1 to 5.
7. 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, the impedance of 9500B
should be set to 50 Ω.
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-Peakmeasurement.
4. Set waveform of the 9500B to sine, amplitude to 5.5 V, and impedance to 50 Ω, and set
the impedance of the oscilloscope channels 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
SDS2352X-E

Frequency Point (Hz)
100k,500k,1M,10M,25M,50M,100M,120M,150M,175M,2
00M,225M,250M,275M,300M,325M,350M,400M,500M

6. Every time the frequency is changed, it is recommended to adjust the Sec/Div to aproper 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, and set 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.
Table 11 Limited Range
Scope Model

SDS2352X-E

Frequency Point (Hz)

Range

≤25M

(-0.5,0.5) dB≤50M(-5,0.8) dB≤300M(-1.5,1) dB≤350M(-3,0) dB

400M(-6,-0.5) dB

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To Verify Bandwidth Limit
This test checks the bandwidth limit of all the analog channels. The test is similar 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
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-Peakmeasurement.
4. Set amplitude of the 9500B to 5.5 V, and impedance to 50 Ω, and set the impedance ofthe oscilloscope channels 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 testing at 2 V/div set startfrequency 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,19M,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 aproper 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 thefrequency is in the range of (12MHz, 28MHz), the Bandwidth Limit of the oscilloscopepass. Else, test at next frequency point. When the test 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 from 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.
Table 13 Trigger sensitivity data
Volts/Div

Frequency

Trigger Range

100 mV/div

10 MHz9.9~10.1 MHz

100 mV/div

bandwidth

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 toAC.
3. Set impedance of the 9500B to 50 Ω, frequency to 10 MHz, and amplitude to 60 mV,
and set the impedance of the oscilloscope channels to 50 Ω.
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 the screen, andcheck 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 SDS2352X-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 using theanalog 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 shown in 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 to achieve astable 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.

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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 a stablewaveform and then record the hardware-measured value which is on the top right ofscreen.
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 withdifferent coupling modes and vertical scales (100 mV/div, 200 mV/div and 2 V/div).
Table 14 Input Impedance data
ChannelCoupling and

Impedance Range

impedance type
0.1V/div

CH

Ext

AC/1 MΩ

0.2V/div,
2V/div

1176000~1224000 Ω
980000~1020000 Ω

DC/1 MΩ

980000~1020000 Ω

1 MΩ

980000~1020000 Ω

Steps:
1. Connect the selected channel of the oscilloscope to the 9500B, as shown in 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 to verify it is within thespecified range in Table 14.

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Disassembly ProceduresThis chapter describes how to remove major parts from the SDS2000X-E series
oscilloscope.

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

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 the maintenance with power
cord disconnected whenever possible.

WARNING!

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 to discharge 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 orlose of functionality. As a minimum, place the oscilloscope on aproperly grounded ESD mat and wear a properly grounded ESD strap.

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

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 in reverse order.

To Remove the Front-Panel Knobs

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

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To Remove the Rear Cover

Figure 16 Removing the rear cover
Steps:
1. Place the oscilloscope face down on a soft surface such as an anti-static mat.
2. Remove the four PM3*6 screws located on the rear panel. Removing the two
PM3*6screws under the tilt-legs in this same position.
3. Lift the rear cover up and off carefully.

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To Remove the Rear Metal Shield

Figure 17 Removing the rear metal shield
Steps:
1. Place the oscilloscope face down on a soft surface such as an anti-static mat.
2. Remove the BNC nut and gasket on the BNC connector.
3. Remove the seven PM 3*6 screws on side of the rear metal shield.
4. Optionally remove the two KM3*6 screws on the main power cord connector if removing
the connector is required.
5. Lift the rear metal shield a little bit to have the access to disconnect the power cable andfan cable on the main board. Be caution about the latching type power cable connector.
6. Remove the rear metal shield completely.

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To Remove the Power Supply Module and the Fan

Figure 18 Removing the power supply module and the fan
Steps:
1. Disconnect the main power cord cable on the power supply module.
2. Optionally remove the PWM3*8 screw and gasket of the earth connecting cable on therear metal cover if removing the main power cord connector is required.
3. Remove the six PC3*6 screws on the power supply module shield.
4. Remove the power supply module shield (without disconnecting the power cable on themodule since disconnecting the latching type connector is tricky under the shield).
5. Disconnect the power cable on the power supply module.
6. Remove the four PC3*6 screws on the power supply module.
7. Remove the power supply module.
8. Optionally remove the four PM3*32 screws and nuts on the fan and then removing the
fan.

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To Remove the Front Cover

Figure 19 Removing the front cover
Steps:
1. Place the oscilloscope back-side down on a soft surface such as an anti-static mat.
2. Disconnect the keyboard cable and the LCD panel cable on the main board.
3. Remove the six PC3*6 screws on the metal frame.
4. Remove the front cover.

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To Remove the Main Board

Figure 20 Removing the BNC nuts and gaskets

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Figure 21 Removing the main board
Steps:
1. Remove the four BNC nuts and gaskets on the front side of the metal frame.
2. Remove the twelve PM3*6 screws on the main Board.
3. Remove the main board.

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To Remove the LCD and Keyboard

Figure 22 Removing the LCD panel and keyboard
Steps:
1. Disconnect the cable between the master keyboard and slave keyboard.
2. Remove the eight PC3*8 screws on the master keyboard.
3. Remove the master keyboard.
4. Remove the five PC3*8 screws on the slave keyboard.
5. Remove the slave keyboard.
6. Remove the four screws and gaskets on the LCD panel.
7. Remove 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 and mainboard.
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 check the power
supply modules and main board.

If the display stuck at logo graph Remove all the USB FLASH drivers plugged into the oscilloscope and power cycle theoscilloscope 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 theproblem.
 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 shortenough for fast display.
 Disconnect associated channel input and recall the default setup following theprocedures 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.

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.
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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 thepower cord whenever possible. DO NOT try to troubleshoot if visible damage is detectedon the power supply module and the main board, return it to SIGLENT for further repair.
WARNING!

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. Always operate the oscilloscope witha three conductor power cable.

WARNING!

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 to discharge 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 orlose of functionality. As a minimum, place the oscilloscope on aproperly grounded ESD mat and wear a properly grounded ESD strap.

CAUTIONREMOVE POWER TO AVIOD DAMAGE
Remove power before you start to disassemble or replace parts. 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 the main board.
The fan will be noneffective without the metal shield and over heat will
occur on some components. The fan will work properly if the backcover is removed but the metal shield remains, and no external fan isrequired in this case.

Required equipment
Table 15 Required Equipment
Equipment

Critical Specifications

Recommended Model

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Digital Multi-meter

Oscilloscope

Accuracy ±0.05%

SIGLENT SDM3065X

1 mV resolution

Agilent 34401A

350MHz BW

SIGLENT SDS2352X-E

1MΩimpedanceTroubleshooting Flowchart
The following flowchart descripts how to troubleshoot the oscilloscope in general case.
This does not guaranteed a 100% cover of all frequent hardware failures. Contact
SIGLENT if you cannot solve the problem.

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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Main Board Drawings

ACQ Power
SupplyProcessor
SystemPS Power
SupplyAcquisition
SystemTo Check the Power Supply Module⚫ Disconnect all the external cables and devices from the front and back panel.
⚫ Disconnect the power cord of the oscilloscope.
⚫ Remove the rear cover and rear metal shield following the instructions in chapter
Disassembly Procedures. Note that the power supply module is on the rear metalshield 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 the power cableconnected 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 16 Voltage parameters of the power supply module
Definition
GND
Primary Power
Positive Auxiliary
Power

Pin
Pin 4, Pin5,

Cable
Color

Tolerance

Black

NULL

Pin 1, Pin 2

Red+6.5 V𝐷𝐶 ± 10%

Pin 8

Blue

+15 V𝐷𝐶 ± 10%

Pin 6

2V𝑃𝑃 ± 20%
AC Line Trigger

Pin 7

Brown

This will only affect AC Line Trigger
function.

Negative AuxiliaryPower-9.5 V𝐷𝐶 ± 10%
Pin 3

OrangeDon’t care (not used in thisoscilloscope).

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Figure 23 Pin definition of the power cable plug

To Check the Main Board⚫ Reconnect the power cable to the main board after you have confirmed that the power
supply module is in good condition.
⚫ There are no user accessible test points on the bottom side of the main board, so you
do not have to remove the main board completely. Leave the main 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 or by causing ashort duration short circuit on the two pads of J22 beside the power cable receptacle J2
if you have disconnected the keyboard cable on the main board.

Short on thetwo 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 main board is powering up, go to
the To Check Other Power Supplies section first to check the stand-by power and themain power.
⚫ If the power or the signal under test is abnormal, replace the main board.

To Check the Processor System
Check the processor power supplies⚫ Locate the Processor power supplies section. Find and measure those test points using
a multi-meter.
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TP6
DVCC1V5_ZYNQ
TP23
DVCC2V5_ZYNQ

TP5
DVCC1V8_ZYNQ

TP7
DVCC3V3_ZYNQ

TP4
DVCC1V0_ZYNQ

Figure 24 Test points for the processor power supplies
Table 17 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 to measure the clock
signal using the method below.
R207
R209
R208

R203
R205 R204

R206

Figure 25 Test points for clock
Table 18 Clock parameters of the Processor System
Test Point

Clock Domain

Level

Frequency Tolerance

R203

Processor Reference

LVCMOS33

33.333333 MHz ± 50PPM

R204

USB Host Reference

LVCMOS33

24.000000 MHz ± 50PPM

R205

USB Device Reference

LVCMOS33

24.000000 MHz ± 50PPM

R206

USB Hub Reference

LVCMOS33

24.000000 MHz ± 50PPM

R207

Ethernet Reference

LVCMOS33

25.000000 MHz ± 50PPM

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R208

Acquisition System Clock

LVCMOS33

25.000000 MHz ± 25PPMR209

PLL Reference Clock

LVCMOS33

25.000000 MHz ± 25PPM

To Check the Acquisition System
Check the Acquisition System power supply⚫ Locate the Acquisition System power supplies section. Find and measure those test
points using a multi-meter.
TP26
AVCC1V9_ADC

TP13
AVCC5V_VGA

TP33
DVCC3V3_BRG

TP17
AVEE-5V

TP12
AVCC5VTP35
DVCC1V2_BRG

TP15
AVCC3V3

Figure 26 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

TP26+1.9V𝐷𝐶 ± 50mV𝐷𝐶

AVCC3V3

TP15+3.3V𝐷𝐶 ± 100mV𝐷𝐶

AVCC5V0_VGA

TP13+5.0V𝐷𝐶 ± 100mV𝐷𝐶

AVCC5V0TP12+5.0V𝐷𝐶 ± 100mV𝐷𝐶

AVEE-5V0

TP17-5.0V𝐷𝐶 ± 200mV𝐷𝐶

DVCC3V3_BRG

TP33+3.3V𝐷𝐶 ± 100mV𝐷𝐶

DVCC1V2_BRG

TP35+1.2V𝐷𝐶 ± 50mV𝐷𝐶

To Check the clock⚫ Locate the oscillator X3, use an oscilloscope to measure the clock signal using themethod below.

R209
R208

Figure 27 Test points for clock
Table 20 Clock parameters of the Acquisition System
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Test Point

Clock Domain

Level

Frequency Tolerance

R208

Acquisition System Clock

LVCMOS33

25.000000 MHz ± 25PPMR209

PLL Reference Clock

LVCMOS33

25.000000 MHz ± 25PPM

To Check Other Power Supplies
Check other power supplies⚫ Find and measure those test points using a multi-meter.
TP16
DVCC5V_USB

J18
FAN_PWR
TP22
VCC3V3_PWR

TP21
VEE-6V5TP14
VCC6V5_MSO

TP25
VCC6V5Figure 28 Test points for other power supplies
Table 21 Voltage parameters of other power supplies
Net Name

Test
Point

Comments

Tolerance+3.3 V𝐷𝐶 ±Stand-by power for power on

100mV𝐷𝐶circuits

TP25+6.5V𝐷𝐶 ± 10%

Main power

FAN_PWR

J18+12V𝐷𝐶 ± 1V𝐷𝐶

Power supply for fan

VEE-6V5

TP21-6.5 V𝐷𝐶 ± 10%

DVCC5V0_USB

TP12

VCC3V3_PWR

TP22

VCC6V5+5.0 V𝐷𝐶 ±Negative power supply for analog
circuits
Power source for USB host VBUS

100mV𝐷𝐶Power supply for SBUS, measuring

VCC6V5_MSO

TP14+6.5 V𝐷𝐶 ± 10%

near 0 V if no SBUS-Device isinserted

To Check the LCD⚫ Reconnect the power cable to the main board after you have confirmed that the power
supply module is in good condition.
⚫ Do not remove the main board completely. Leave the main board on the main metalframe with front cover, keyboard and LCD connected.
⚫ Power up the main board either by pushing the front panel power button or by causing ashort duration short circuit on the two pads of J22 beside the power 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.
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TP11
VCC10V4_LCD
TP10
VCC16_LCD
TP8
VEE-6V8_LCD
TP9VLEDP_LCD

Figure 29 Test points for the LCD power supplies
Table 22 Voltage parameters of the LCD power supplies
Net Name

TestTolerance

Point+10.4 V𝐷𝐶 ±VCC10V4_LCD

TP11

VCC16V_LCD

TP10+16 V𝐷𝐶 ± 10%

VEE-6V8_LCD

TP8-6.8V𝐷𝐶 ± 10%

VLEDP_LCD

TP9

10%

+6.5V𝐷𝐶 ~ +20
V𝐷𝐶◼ 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 to measure thesignal using the method below.

R420

R423

R422

Figure 30 Test points for LCD signal
Table 23 Signal parameters of the LCD
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Test Point

SignalLevel

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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Contact SIGLENTSIGLENT Technologies Co., Ltd
Address：3/F, building NO.4, Antongda Industrial Zone, 3rd LiuxianRoad, Bao’an District, Shenzhen, P.R.China
Tel：0086-755-3661 5186
E-mail: sales@siglent.com
http://www.siglent.com

SIGLENT Technologies North America, Inc
Address: 6557 Cochran Rd Solon, Ohio 44139
Tel: 440-398-5800
Toll Free:877-515-5551
Fax: 440-399-1211
E-mail: info@siglentna.com
http://www.siglentna.com

SIGLENT Technologies Europe GmbH
Staetzlinger Str. 70, 86165 Augsburg, Germany
Tel: +49(0)-821-666 0 111 0
Fax: +49(0)-821-666 0 111 22
E-mail: info-eu@siglent.com
Web: www.siglenteu.com

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