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SIGLENT TECHNOLOGIES SDS5000X Series Service Manual

Digital oscilloscope
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SDS5000X Series
Digital Oscilloscope
Service Manual
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Summary of Contents for SIGLENT TECHNOLOGIES SDS5000X Series

  • Page 1 SDS5000X Series Digital Oscilloscope Service Manual E01A...

  • Page 2: Table Of Contents

    SDS5000XSeries Digital Oscilloscope Service Manual Contents CONTENTS ..............................2 GENERAL SAFETY SUMMARY ......................4 ........................... 4 AFETY ERMS AND YMBOLS ..........................5 ORKING NVIRONMENT ..........................7 OOLING EQUIREMENTS AC P ................................. 8 OWER ....................... 8 OWER AND GROUND CONNECTIONS ..............................9 ALIBRATION ................................
  • Page 3 SDS5000XSeries Digital Oscilloscope Service Manual 5.11 T ........................51 ERIFY RIGGER ENSITIVITY 5.12 T ..........................53 ERIFY HANNEL 5.13 T ........................54 ERIFY NPUT MPEDANCE DISASSEMBLY PROCEDURES ......................57 ...................... 57 AFETY ONSIDERATION AND AUTIONS ..............................58 OOLS ISTS ..........................59 ISASSEMBLY ROCEDURES 6.3.1...

  • Page 4: General Safety Summary

    SDS5000XSeries Digital Oscilloscope Service Manual General Safety Summary This chapter contains information and warnings that must be followed to keep the instrument operating under the appropriate safety conditions. In addition to the safety precautions specified in this section, you must also follow recognized safety procedures.

  • Page 5: Working Environment

    SDS5000XSeries Digital Oscilloscope Service Manual CAUTION The "CAUTION" symbol indicates a potential hazard. It calls attention to a procedure, practice, or condition which may be dangerous if not followed. Do not proceed until its conditions are fully understood and met. WARNING The "WARNING"...
  • Page 6 SDS5000XSeries Digital Oscilloscope Service Manual Non-operating: ≤ 15,266 m Note: Direct sunlight, radiators, and other heat sources should be taken into account when assessing the ambient temperature. WARNING: Do not operate the oscilloscope in an explosive atmosphere or wet and damp conditions. The design of the instrument has been verified to conform to EN 61010-1 safety standard per the following limits: Installation (overvoltage) Category: II (Mains Supply Connector)

  • Page 7: Cooling Requirements

    SDS5000XSeries Digital Oscilloscope Service Manual excessive impact. CAUTION: Do not exceed the maximum specified front panel terminal (CH1, CH2, CH3, CH4, EXT) voltage levels. Refer to Specifications for more details. CAUTION: Do not connect or disconnect probes or test leads while they are connected to a voltage source.

  • Page 8: Ac Power

    SDS5000XSeries Digital Oscilloscope Service Manual AC Power The instrument operates with a single-phase, 100 to 240 Vrms (+/-10%) AC power at 50/60 Hz (+/-5%), orsingle-phase 100 - 120 Vrms (+/-10%) AC power at 400Hz (+/-5%). No manual voltage selection is required because the instrument automatically adapts to line voltage.

  • Page 9: Calibration

    SDS5000XSeries Digital Oscilloscope Service Manual contact. Use only the power cord specified for this instrument and certified for the country of use. Warning:Electrical Shock Hazard! Any interruption of the protective ground conductor within or outside of the scope or disconnection of the safety ground terminal creates a hazardous situation.

  • Page 10: Cleaning

    SDS5000XSeries Digital Oscilloscope Service Manual Cleaning Clean only the exterior of the instrument, using a damp, soft cloth. Do not use chemicals or abrasive elements. Under no circumstances allow moisture to penetrate the instrument. To avoid electrical shock, unplug the power cord from the AC outlet before cleaning. Warning:ElectricalShock Hazard! No operator serviceable parts inside.
  • Page 11 SDS5000XSeries Digital Oscilloscope Service Manual Warning: Any use of the scope in a manner not specified by the manufacturer may impair the instrument’s safety protection. This instrument should not be directly connected to human subjects or used for patient monitoring. WWW.SIGLENT.COM 11/ 90...

  • Page 12: First Steps

    SDS5000XSeries Digital Oscilloscope Service Manual First steps Delivery Checklist First, verify that all items listed on the packing list have been delivered. If you note any omissions or damage, please contact your nearest SIGLENT customer service center or distributor as soon as possible. If you fail to contact us immediately in case of omission or damage, we will not be responsible for replacement.

  • Page 13: Maintenance Agreement

    SDS5000XSeries Digital Oscilloscope Service Manual c) The use of non-SIGLENT accessories or supplies. Furthermore, SIGLENT shall not be obligated to service a product that has been modified. Spare, replacement parts and repairs have a 90-day warranty. The oscilloscope's firmware has been thoroughly tested and is presumed to be functional.

  • Page 14: Document Conventions

    SDS5000XSeries Digital Oscilloscope Service Manual Document Conventions For convenience, text surrounded by a box border is used to represent the button of the front panel. For example,Printrepresents the "Print" button on the front panel. Italicizedtext with shading is used to represent the touchable or clickable menu/button/region on the touch screen.For DISPLAY example,...

  • Page 15: Prepare Information

    SDS5000XSeries Digital Oscilloscope Service Manual 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 ...
  • Page 16 SDS5000XSeries Digital Oscilloscope Service Manual instrument to connect it to AC power. Figure 1 Connect the power cord CAUTION: To avoid electric shock, make sure that the instrument is correctly grounded to the earth before connecting AC power. Press thePowerbutton located at the lower-left corner of the front panel and note that several buttons 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...

  • Page 17: Probe Compensation

    SDS5000XSeries Digital Oscilloscope Service Manual 4.1.2 Probe Compensation When a probe is used for the first time, you should compensate it to match the input channel of the oscilloscope. Non-compensated or poorly compensated probe may increase measurement inaccuracy or error. The probe compensation procedures are as follows: 1.

  • Page 18: Auto Setup

    SDS5000XSeries Digital Oscilloscope Service Manual 4.1.3 Auto Setup Press the Auto Setupbuttonto enable the waveform auto setting function. Theoscilloscope will automatically adjust the horizontal time base, vertical scale, and trigger mode according to the input signal to obtain an optimum waveform display. Auto Setup will not work on all signal types, especially time-varying ...

  • Page 19: Self-Calibration

    SDS5000XSeries Digital Oscilloscope Service Manual 4.1.4 Self-Calibration The self-calibration program can quickly calibrate the oscilloscope to reach the best working state and the most precise measurement. It is recommended to perform a self-calibration if the change of ambient temperature is more than 5 ℃. Make sure the oscilloscope has been warmed up or operated for more than 30 minutes before the self-calibration.

  • Page 20: Interface Test

    SDS5000XSeries Digital Oscilloscope Service Manual Interface Test The SDS5000X 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. To ensure the oscilloscope is operating properly, it is recommended that the user first test the interfaces.

  • Page 21: Usb Device Test

    SDS5000XSeries Digital Oscilloscope Service Manual Figure 3 USB drive detected 4.2.2 USB Device Test To test if the USB Device interface is operating correctly. Tools: A computer with a USB interface  A standard USB cable(TypeAB)  National Instruments NI-Max software ...
  • Page 22 SDS5000XSeries Digital Oscilloscope Service Manual 2. Connect the oscilloscope to the computer using a 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 is displayed. 4.

  • Page 23: Lan Port Test

    SDS5000XSeries Digital Oscilloscope Service Manual 4.2.3 LAN Port Test Use to test if the LAN interface operates correctly when connected with NI Visasoftware. Tools: A computer with a LAN interface  A standard LAN cable  National Instruments NI-MAX software ...
  • Page 24 SDS5000XSeries Digital Oscilloscope Service Manual Figure 4 IP Setting interface 1. Connect the oscilloscope to the computer using a LAN cable via the LAN interface ports. 2. Run NI-MAX software. Click “Device and Interface” at the upper left corner of the NI software interface and select the “LAN” device symbol.
  • Page 25 SDS5000XSeries Digital Oscilloscope Service Manual “Read”operation information will be displayed. WWW.SIGLENT.COM 25/ 90...

  • Page 26: Pass/Fail Out Test

    SDS5000XSeries Digital Oscilloscope Service Manual 4.2.4 Pass/Fail out Test To test the Mask Test function and signal output by viewing on anotheroscilloscope. Tools: A second oscilloscope  Two BNC cables  Steps: 1. Turn on the SDS5000X oscilloscope. 2. Enable Channel 1. Analysis>Mask 3.
  • Page 27 SDS5000XSeries Digital Oscilloscope Service Manual Create Mask Note: press to complete Mask setting, after mask x setting and mask y setting. After selecting the corresponding items as shown in the table above, the screen will appear as in Figure 5: Figure 5 Mask Test Interface All data points of waveform must be inside the mask to pass the test.
  • Page 28 SDS5000XSeries Digital Oscilloscope Service Manual oscilloscope. Adjust the second oscilloscope’s time base 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 6Pulse Waveform 28/ 90 WWW.SIGLENT.COM...

  • Page 29: Performance Test

    SDS5000XSeries Digital Oscilloscope Service Manual Performance Test This chapter explains testing the oscilloscope 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 2Test equipment Equipment Description...
  • Page 30 SDS5000XSeries Digital Oscilloscope Service Manual The figures below show the interconnections between the test equipment and PC to the oscilloscope under test: 9500B SDS5000X SDS2000X-E GPIB CH3 CH4 BNC CABLE Figure 7Connecting test instruments for DCG\Offset 9500B SDS5000X GPIB BNC CABLE Figure 8Connecting test instruments for Clock\Trigger Delay\Trig Level SDS5000X 9500B...
  • Page 31 SDS5000XSeries Digital Oscilloscope Service Manual Figure 9Connecting test instruments for BW\BWL\Trigger Sensitivity Figure 10Connecting test instruments for Input impedance The figures below show the interconnections between the test equipment and PC to Ext Trigger test: 9500B SDS5000X GPIB BNC CABLE Figure 11Connecting test instruments for Ext Trigger Delay\ Ext Trigger Level WWW.SIGLENT.COM 31/ 90...
  • Page 32 SDS5000XSeries Digital Oscilloscope Service Manual Figure 12Connecting test instruments for Ext Trigger Sensitivity 9500B SDS5000X GPIB CH1 CH2 CH3 CH4 BNC Cable Figure 13Connecting test instruments for Channel Skew 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.
  • Page 33 SDS5000XSeries Digital Oscilloscope Service Manual Calibration operation must be performed to achieve the specified performance. WWW.SIGLENT.COM 33/ 90...

  • Page 34: To Verify Dc Gain Accuracy

    SDS5000XSeries Digital Oscilloscope Service Manual To Verify DC Gain Accuracy DC Gain Accuracy Slope = LINEST(V error1 error5 Setting1 Setting5 Note:“V ” represents the DC voltage output level setting. Setting “V ” represents the difference between the output setting and error the measurement.
  • Page 35 SDS5000XSeries Digital Oscilloscope Service Manual repeat step 4 to step6. 8. Turn the 9500B output off. 9. Disconnect the connections to all the channels. Table 3DC Gain Accuracy Volt/Div DC voltage output levels DC Gain Accuracy error 10 V/div 30 V,15V ,0,-15 V,-30 V ±1.5% 5 V/div 15 V, 7.5 V,0,-7.5 V,-15 V...

  • Page 36: To Verify Offset Accuracy

    SDS5000XSeries Digital Oscilloscope Service Manual To Verify Offset Accuracy Offset Accuracy Slope LINEST(Offset :Offset error1 error5 Offset :Offset out1 out5 Note:“Offset ”represents DC voltage output level setting; “Offset ”represents the difference between the output setting error and the measurement. This test verifies the non-interleaved mode Offset Accuracy of all the channels.
  • Page 37 SDS5000XSeries Digital Oscilloscope Service Manual 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 inTable 4. 7. Check to verify that abs(Vzero) in step 4 is within the limits specified in Table 4.

  • Page 38: To Verify Time Base Accuracy

    SDS5000XSeries Digital Oscilloscope Service Manual 10 mV/div 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 1 mV/div 10 mV, 5 mV,0,-5 mV, -10 mV ±1.5% ±0.00224 To Verify Time Base Accuracy...

  • Page 39: To Verify Trigger Delay

    SDS5000XSeries Digital Oscilloscope Service Manual 7. Disconnect the test connection. 8. To Verify Trigger Delay 9. This test checks the trigger delay of the analog channels. In this test, the impedance of both the 9500B and the oscilloscope should be set to 50 Ω.

  • Page 40: To Verify Ext Trigger Delay

    SDS5000XSeries Digital Oscilloscope Service Manual 6. Press Measurebutton on the front panel of the oscilloscope to display Time@Level measurement. 7. Check if the result is in the limited range above. 8. Disconnect the test connection. 9. Check other channels in the same way as steps 1 to 7. To Verify Ext Trigger Delay This test checks the trig delay between the external channel and analog channels.

  • Page 41: To Verify Trigger Level

    SDS5000XSeries Digital Oscilloscope Service Manual 5. Set the oscilloscope Sec/Divto 2ns/div. 6. Set the oscilloscope trigger source to EXT, the trigger slope to Rising, and the trigger level to 0. 7. Press Measurebutton on the front panel of the oscilloscope to display Delay measurement.

  • Page 42: To Verify Ext Trigger Level

    SDS5000XSeries Digital Oscilloscope Service Manual 4. Set the oscilloscope Volts/Div to 100mV/div, trigger source to selected channel, trigger slope to positive and coupling mode to DC. 5. Set the trigger level to 300mV. 6. Press Measurebutton on the front panel of the oscilloscope to display Level@xmeasurement.
  • Page 43 SDS5000XSeries Digital Oscilloscope Service Manual EXT/5 435mV Abs(Error) < 103.5mV Steps: 1. Connect channel 1 and external trigger channel of the oscilloscope to the 9500B with a BNC T connector, as shown inFigure 11. 2. Set the oscilloscope Sec/Div to 500 us/div. 3.

  • Page 44: To Verify Noise Floor

    SDS5000XSeries Digital Oscilloscope Service Manual Level@x). 15. Check if the trigger level is in the limited range inTable 5. 16. Set the trigger level to 0mV and -1035mV,repeat step13to step15. 17. Set trigger slope to negative, repeat step13to step16. 18. Disconnect the test connection. To Verify Noise Floor This test checks the noise floor of the analog channels and varies from models.

  • Page 45: To Verify Bandwidth

    SDS5000XSeries Digital Oscilloscope Service Manual Steps: 1. Set the oscilloscope Sec/Div to 1ms/div. 2. Set the oscilloscope Volts/Divto 500uV/div. 3. Press theMeasure button on the front panel of the oscilloscope to display Stdev and Peak-Peak measurement. 8∗vdiv 4. Calculate SNR (SNR =20 ∗ log ), pkpk/stdev.
  • Page 46 SDS5000XSeries Digital Oscilloscope Service Manual 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 30mV, and impedance to 50 Ω, and set the impedance of the oscilloscope channels to 50 Ω.
  • Page 47 SDS5000XSeries Digital Oscilloscope Service Manual 1. Every time the frequency is changed, it is recommended to adjust the Sec/Div to a proper value to display a complete waveform. 2. Record the Peak-Peak measurement of the waveform. 3. Set the oscilloscope Volts/Div to the setting choices, and repeat step2 to step7.
  • Page 48 SDS5000XSeries Digital Oscilloscope Service Manual ≤1001M (-45,3) dB ≤36M (-0.5,0.5) dB ≤118M (-0.8,0.8) dB SDS5034X 50 Ω ≤234M (-1.2,1) dB ≤351M (-2.5,1) dB ≤501M (-44,3) dB ≤98M (-0.8,0.5) dB ≤121M (-0.8,0.8) dB ≤168M (-0.8,1.3) dB ≤251M (-0.5,1.9) dB SDS5104X 1 MΩ ≤301M (-0.8,1.3) dB ≤351M...

  • Page 49: T Overify Bandwidth Limit

    SDS5000XSeries Digital Oscilloscope Service Manual ≤234M (-3,1) dB ≤351M (-5,1) dB ≤501M (-44,3) dB 5.10 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.
  • Page 50 SDS5000XSeries Digital Oscilloscope Service Manual Frequency Point (Hz) 1k,10k,100k,1M,10M,12M,14M,16M,18M,20M,22M,24M,26M,28M,30 1. Every time the frequency is changed, it is recommended to adjust the Sec/Div to a value that displays a complete waveform. 2. Record the Peak-Peak measurement value of the waveform. Table 10Limited Range Frequency Point...

  • Page 51: T Overify Trigger Sensitivity

    SDS5000XSeries Digital Oscilloscope Service Manual 5.11 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 11Trigger sensitivity data Volts/Div Frequency...
  • Page 52 SDS5000XSeries Digital Oscilloscope Service Manual of the screen, and check that it is in the specified trigger range listed inTable 11. 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.

  • Page 53: T Overify Channel Skew

    SDS5000XSeries Digital Oscilloscope Service Manual 6. Check if the frequency is within the specified trigger range listed in Table 10. 7. Set trigger slope to Negative, repeat steps 4 to 6. 8. Set frequency of the 9500Bto the oscilloscope’s bandwidth frequency, amplitude to 300 mV.

  • Page 54: T Overify Input Impedance

    SDS5000XSeries Digital Oscilloscope Service Manual Channel Skew Limit: abs(T@L) ≤ 150 ps Steps: 1. Connect two selected channels of the oscilloscope to the 9500B shown as inFigure 13. 2. Press the ‘Aux’ key at the right of the ‘OSCILLOSCOPE CALIBRATOR’ panel of the 9500B and select Skew function.
  • Page 55 SDS5000XSeries Digital Oscilloscope Service Manual Table 12Input Impedance data Coupling and Impedance Range Channel impedance type 0.1V/div 1176000~1224000 Ω AC/1 MΩ 0.2V/div,2 980000~1020000 Ω V/div DC/1 MΩ 980000~1020000 Ω DC(AC)/50Ω 49.15~50.85 1 MΩ 980000~1020000 Ω 50Ω 49.15~50.85 Steps: 1. Connect the selected channel of the oscilloscope to the 9500B, as shown inFigure 10.
  • Page 56 SDS5000XSeries Digital Oscilloscope Service Manual 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 the specified range in Table 12.

  • Page 57: Disassembly Procedures

    SDS5000XSeries Digital Oscilloscope Service Manual Disassembly Procedures This chapter describes how to remove major parts from the SDS5000X 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.

  • Page 58: Tools Lists

    SDS5000XSeries Digital Oscilloscope Service Manual capacitors to discharge before you begin disassembly. CAUTION ESD CAUTION Electrostatic 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 a minimum, place the oscilloscope on a properly grounded ESD mat and wear a properly grounded ESD strap.

  • Page 59: Disassembly Procedures

    SDS5000XSeries Digital Oscilloscope Service Manual Disassembly Procedures This section describes how to remove the modules in the oscilloscopein detail. To install the removed parts or replace a new part, follow the instructions in reverse order. 6.3.1 To Remove the Rear Cover and Knobs Figure 14To remove the rear cover and knobs Steps: 1.

  • Page 60: To Remove The Rear Metal Module

    SDS5000XSeries Digital Oscilloscope Service Manual 3. Lift the rear cover up and off carefully. 6.3.2 To Remove the Rear Metal Module Figure 15To remove therear metal module Steps: 1. Remove the eight PM3*6 screws outside of the rear metal module. 2.

  • Page 61: To Remove The Power Supply Module And Fan

    SDS5000XSeries Digital Oscilloscope Service Manual 6.3.3 To Remove the Power Supply Module and Fan Figure 16To remove the power supply module and Fan Steps: 1. Remove the tenPM3*6 screws outside the metal rear cover. 2. Remove the metal rear cover. 3.

  • Page 62: To Remove The Front Panel And Rubber Keypad

    SDS5000XSeries Digital Oscilloscope Service Manual 6.3.4 To Remove the Front Panel and Rubber Keypad Figure 17To remove the front panel and rubber keypad Steps: 1. Place the oscilloscope back-side down on a soft surface such as an anti-static mat. 2. Remove the three PM3*6 screws on the front of the panel. 3.

  • Page 63: To Remove The Keyboard And Probe Interface Board

    SDS5000XSeries Digital Oscilloscope Service Manual 6.3.5 To Remove the Keyboard and Probe Interface Board Figure 18To removethe keyboard and probe interface board. Steps: 1. Remove the seven PM3*6 screws on the keyboard. 2. Disconnect the cable between the probe interface board and the keyboard.

  • Page 64: To Remove The Acquisition Board

    SDS5000XSeries Digital Oscilloscope Service Manual 6.3.6 To Remove the Acquisition board Figure 19To remove the acquisition board Steps: 1. Disconnect the cable between the Acquisition board and the LCD interface board. 2. Remove the four BNC nuts and gaskets on the front side of the metal frame.

  • Page 65: To Remove The Lcd Module And Lcd Interface Board

    SDS5000XSeries Digital Oscilloscope Service Manual 6.3.7 To Remove the LCD Module and LCD Interface Board Figure 20To remove the LCD module and LCD interface board Steps: 1. Remove the five PM3*6 screws on the LCD module. 2. Disconnect the cable between the LCD and LCD interface board. 3.

  • Page 66: Solving General Problems

    SDS5000XSeries Digital Oscilloscope Service Manual Solving General Problems This chapterincludes suggestions for solving general problems. If there is no display Is the light of the power button glowing? If yes: Go to the Troubleshootingchapter and check the power supply  modules and acquisition board.
  • Page 67 SDS5000XSeries Digital Oscilloscope Service Manual Restart the oscilloscope and press the math button on the front  panel for multiple times when the scope is starting up. Wait ten minutes to see if the oscilloscope can boot successfully.  If not, contact SIGLENT for further instructions. If it is, try to upgrade to the latest firmware to solve the problem.
  • Page 68 SDS5000XSeries Digital Oscilloscope Service Manual If the baseline trace drift out of specification Check that the fan is running.  Check that the vertical position setting is working.  Perform self-calibration following the procedures in the User  Manual. If self-calibration does not work, contact SIGLENT for further ...

  • Page 69: Troubleshooting

    SDS5000XSeries Digital Oscilloscope Service Manual Troubleshooting This chapter contains information and procedures to troubleshooting general hardware failures. Safety Consideration and Cautions Only qualified personnel should perform 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 acquisition board, return it to SIGLENT for further repair.

  • Page 70: Required Equipment

    SDS5000XSeries Digital Oscilloscope Service Manual grounded ESD mat and wear a properly grounded ESD strap. CAUTION REMOVE POWER SUPPLY TO AVOID DAMAGE Remove power supply before start disassemble or replace parts. Disassemble or replace parts with power on is not allowed, damage to the components may occur.
  • Page 71 SDS5000XSeries Digital Oscilloscope Service Manual problem. Begin Test Power Supply Module Replace Power Good? Supply Module Test Main Board Replace Main Good? Board Test LCD Good? Replace LCD WWW.SIGLENT.COM 71/ 90...

  • Page 72: To Check The Power Supply Module

    SDS5000XSeries Digital Oscilloscope Service Manual To 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 plastic cover and metal cover following the ...

  • Page 73: To Check The Acquisitionboard

    SDS5000XSeries Digital Oscilloscope Service Manual (Control Bus) Output Vo sense+ (12V) Output Vo sense- (GND) Output Enable(3.3V/0V) 6，7 Output Input Vo Standby (5V) Figure 21Pin definition of the power supply connector (J24) Figure 22Pin definition of the power control bus connector (J22) To Check the AcquisitionBoard There are two different kinds of acquisition boards for the SDS5000X series.

  • Page 74: Acquisition Board Sdy8.007.163

    SDS5000XSeries Digital Oscilloscope Service Manual 8.5.1 Acquisition Board SDY8.007.163 8.5.1.1 Acquisition Board Drawing It is recommended to remove the acquisition board from the metal  frame and re-assemble the power supply module to the metal frame for easy access to the test points and safety considerations. Follow the instructions in chapter Disassembly Procedures.
  • Page 75 SDS5000XSeries Digital Oscilloscope Service Manual acquisition board. 8.5.1.2 Check the Acquisition System power supplies Check the Acquisition System power supplies. Find and measure those test points using a multi-meter. 12.6V Figure 23Acquisition Board Power Supply Distribution WWW.SIGLENT.COM 75/ 90...
  • Page 76 SDS5000XSeries Digital Oscilloscope Service Manual Figure 24Test points for the Acquisition board power supplies Figure 25Test points for the Acquisition board power supplies (continued) 76/ 90 WWW.SIGLENT.COM...
  • Page 77 SDS5000XSeries Digital Oscilloscope Service Manual Figure 26Test points for the Acquisition board power supplies (continued) Table 15Voltage parameters of theAcquisition System power supplies Number Net Name Test Point Tolerance VCC12V6 +12.6V ±400mV ���� ���� +1.0 V ± 50mV VCC1V0A C1046 ����...
  • Page 78 SDS5000XSeries Digital Oscilloscope Service Manual +0.75 V ± 22.5mV VREF_DDR_C TP67 ���� ���� VREF_DDR_D TP69 +0.75 V ± 22.5mV ���� ���� +0.75 V ± 22.5mV VTT_DDR_A TP64 ���� ���� VTT_DDR_B TP66 +0.75 V ± 22.5mV ���� ���� VTT_DDR_C TP68 +0.75 V ±...
  • Page 79 SDS5000XSeries Digital Oscilloscope Service Manual VCC-13V5 TP48 -13.5V ± 400mV ���� ���� -10.5V ± 300mV VCC-10V5_FE TP143 ���� ���� -12V ± 360mV VCC-12V_PROBUS TP130 ���� ���� +12V ± 3600mV VCC12V_PROBUS TP49 ���� ���� +1.8 V ± 50mV VCC1V8_FE TP134 ���� ����...

  • Page 80: Acquisition Board Sdy8.007.140

    SDS5000XSeries Digital Oscilloscope Service Manual High level indicates PLL locked Reference Clock TP43 LVCMOS33 Locked Low level means PLL lock failed 8.5.2 Acquisition Board SDY8.007.140 8.5.2.1 Acquisition Board Drawings It is recommended that to remove the acquisition board from the ...
  • Page 81 SDS5000XSeries Digital Oscilloscope Service Manual no sign that the acquisition board is powering up, go toTo Check the Power Supply Modulesection to check the stand-by power and the main power. If the power or the signal under test is abnormal, replace the ...
  • Page 82 SDS5000XSeries Digital Oscilloscope Service Manual Figure 29Test points for the Acquisition board power supplies Figure 30 Test points for the Acquisition board power supplies (continued) 82/ 90 WWW.SIGLENT.COM...
  • Page 83 SDS5000XSeries Digital Oscilloscope Service Manual Figure 31 Test points for the Acquisition board power supplies (continued) Table 17Voltage parameters of theAcquisition System power supplies Number Net Name Test Point Tolerance VCC12V6 +12.6V ±400mV ���� ���� +1.0V ± 50mV VCC1V0A C1046 ����...
  • Page 84 SDS5000XSeries Digital Oscilloscope Service Manual +0.75V ± 22.5mV VREF_DDR_C TP67 ���� ���� VREF_DDR_D TP69 +0.75V ± 22.5mV ���� ���� +0.75V ± 22.5mV VTT_DDR_A TP64 ���� ���� VTT_DDR_B TP66 +0.75V ± 22.5mV ���� ���� VTT_DDR_C TP68 +0.75V ± 22.5mV ���� ���� +0.75V ±...

  • Page 85: To Check The Processor Board

    SDS5000XSeries Digital Oscilloscope Service Manual using the method below. Figure 32Test points for clock Table 18Clock parameters of the Acquisition System Test Point Clock Domain Level Description TP44 PLL Reference Clock LVCMOS33 Typical 10 MHz High level indicates PLL locked Reference Clock TP43 LVCMOS33...

  • Page 86: Check The Clock

    SDS5000XSeries Digital Oscilloscope Service Manual Figure 33Test points for the processor power supplies Table 19Voltage parameters of the processor power supplies Net Name Test Point Tolerance +1.0 V ± 50mV DVCC1V0_ZYNQ TP1 ���� ���� +1.8 V ± 50mV DVCC1V8_ZYNQ TP2 ����...

  • Page 87: To Check The Lcd

    SDS5000XSeries Digital Oscilloscope Service Manual Figure 34 Test points for clock Table 20Clock parameters of the Processor System Test Point Clock Domain Level Frequency Tolerance 33.333333 MHz ± 50PPM Processor Reference LVCMOS33 24.000000 MHz ± 50PPM USB Host Reference LVCMOS33 24.000000 MHz ±...

  • Page 88: To Check The Lcd Power Supply

    SDS5000XSeries Digital Oscilloscope Service Manual Connect the LCD cable to the acquisition board.  Power up the acquisition board by pushing the front panel power  button. 8.7.1 To Check the LCD Power Supply Find and measure those test points using a multi-meter. Figure 35Test points for the LCD power supplies Table 21Voltage parameters of the LCD power supplies Net Name...
  • Page 89 SDS5000XSeries Digital Oscilloscope Service Manual Figure 36Test points for LCD signal Table 22Signal parameters of the LCD Test Point Signal Level Description PWM signal to control the J32 PIN5 LVCMOS33 brightness of the LCD. LCD_ON Normally 50% duty cycle. LCD_DATA0_N/P LCD DATA signal.
  • Page 90 SDS5000XSeries Digital Oscilloscope Service Manual 90/ 90 WWW.SIGLENT.COM...

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