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SIGLENT SDS5000X Series Service Manual

Digital oscilloscope
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SDS5000X Series
Digital Oscilloscope
Service Manual
SM0105X-E01A

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  • Page 1 SDS5000X Series Digital Oscilloscope Service Manual SM0105X-E01A...

  • Page 2: Table Of Contents

    SDS5000X Series Digital Oscilloscope Service Manual Contents CONTENTS ..........................2 GENERAL SAFETY SUMMARY ....................4 ......................4 AFETY ERMS AND YMBOLS ....................... 5 ORKING NVIRONMENT ......................7 OOLING EQUIREMENTS AC P ........................... 7 OWER ....................8 OWER AND GROUND CONNECTIONS ..........................
  • Page 3 SDS5000X Series Digital Oscilloscope Service Manual ....................49 ERIFY RIGGER ENSITIVITY ......................52 ERIFY HANNEL ....................... 53 ERIFY NPUT MPEDANCE DISASSEMBLY PROCEDURES..................... 55 ..................55 AFETY ONSIDERATION AND AUTIONS ..........................56 OOLS ISTS ......................57 ISASSEMBLY ROCEDURES 6.3.1 To Remove the Rear Cover and Knobs ................57 6.3.2...

  • Page 4: General Safety Summary

    SDS5000X Series 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

    SDS5000X Series 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.
  • Page 6 SDS5000X Series Digital Oscilloscope Service Manual 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...

  • Page 7: Cooling Requirements

    SDS5000X Series Digital Oscilloscope Service Manual 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: Power And Ground Connections

    SDS5000X Series Digital Oscilloscope Service Manual AC power at 400Hz (+/-5%). No manual voltage selection is required because the instrument automatically adapts to line voltage. Depending on the type and number of options and accessories (probes, PC port plug-in, etc.), the instrument can consume up to 100 W of power.

  • Page 9: Calibration

    SDS5000X Series Digital Oscilloscope Service Manual 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. Intentional interruption is prohibited. The position of the oscilloscope should allow easy access to the socket.

  • Page 10: Abnormal Conditions

    SDS5000X Series Digital Oscilloscope Service Manual moisture to penetrate the instrument. To avoid electrical shock, unplug the power cord from the AC outlet before cleaning. Warning: Electrical Shock Hazard! No operator serviceable parts inside. Do not remove covers. Refer servicing to qualified personnel...

  • Page 11: 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 12: Maintenance Agreement

    SDS5000X Series 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 13: Document Conventions

    SDS5000X Series 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, Print represents the "Print" button on the front panel. Italicized text with shading is used to...

  • Page 14: Prepare Information

    SDS5000X Series 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 15 SDS5000X Series 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 the Power button 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.

  • Page 16: Probe Compensation

    SDS5000X Series 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.

  • Page 17: Auto Setup

    SDS5000X Series Digital Oscilloscope Service Manual 4.1.3 Auto Setup Press the Auto Setup button 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.

  • Page 18: Self-Calibration

    SDS5000X Series 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 19: Interface Test

    SDS5000X Series 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 20: Usb Device Test

    SDS5000X Series 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 (Type AB) ...
  • Page 21 SDS5000X Series 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.

  • Page 22: Lan Port Test

    SDS5000X Series Digital Oscilloscope Service Manual 4.2.3 LAN Port Test Use to test if the LAN interface operates correctly when connected with NI Visa software. Tools: A computer with a LAN interface  A standard LAN cable  National Instruments NI-MAX software ...
  • Page 23 SDS5000X Series 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 24 SDS5000X Series Digital Oscilloscope Service Manual operation information will be displayed. 24 / 88 WWW.SIGLENT.COM...

  • Page 25: Pass/Fail Out Test

    SDS5000X Series Digital Oscilloscope Service Manual 4.2.4 Pass/Fail out Test To test the Mask Test function and signal output by viewing on another oscilloscope. Tools: A second oscilloscope  Two BNC cables  Steps: 1. Turn on the SDS5000X oscilloscope.
  • Page 26 SDS5000X Series 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 27 SDS5000X Series 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 6 Pulse Waveform WWW.SIGLENT.COM...

  • Page 28: Performance Test

    SDS5000X Series 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:...
  • Page 29 SDS5000X Series Digital Oscilloscope Service Manual equipment and PC to the oscilloscope under test: GPIB BNC CABLE Figure 7 Connecting test instruments for DCG\Offset GPIB BNC CABLE Figure 8 Connecting test instruments for Clock\Trigger Delay\Trig Level 9500B SDS5000X GPIB BNC CABLE Figure 9 Connecting test instruments for BW\BWL\Trigger Sensitivity WWW.SIGLENT.COM...
  • Page 30 SDS5000X Series Digital Oscilloscope Service Manual Figure 10 Connecting test instruments for Input impedance The figures below show the interconnections between the test equipment and PC to Ext Trigger test: GPIB BNC CABLE Figure 11 Connecting test instruments for Ext Trigger Delay\ Ext Trigger Level 30 / 88 WWW.SIGLENT.COM...
  • Page 31 SDS5000X Series Digital Oscilloscope Service Manual Figure 12 Connecting test instruments for Ext Trigger Sensitivity GPIB CH1 CH2 CH3 CH4 BNC Cable Figure 13 Connecting 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 32 SDS5000X Series Digital Oscilloscope Service Manual Calibration operation must be performed to achieve the specified performance. 32 / 88 WWW.SIGLENT.COM...

  • Page 33: To Verify Dc Gain Accuracy

    SDS5000X Series 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 34 SDS5000X Series Digital Oscilloscope Service Manual repeat step 4 to step 6. 8. Turn the 9500B output off. 9. Disconnect the connections to all the channels. Table 3 DC Gain Accuracy Volt/Div DC voltage output levels DC Gain Accuracy error...

  • Page 35: To Verify Offset Accuracy

    SDS5000X Series 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.
  • Page 36 SDS5000X Series Digital Oscilloscope Service Manual 9500B to the output level as step 4. 6. Make a linear regression with these 5 data points: Offseterror1~Offseterror5, Offsetout1~Offsetout5. Check to verify that the slope is within the limits specified in Table 4.

  • Page 37: To Verify Time Base Accuracy

    SDS5000X Series Digital Oscilloscope Service Manual 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 This test verifies the time base accuracy of the oscilloscope.

  • Page 38: To Verify Trigger Delay

    SDS5000X Series Digital Oscilloscope Service Manual 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 39: To Verify Ext Trigger Delay

    SDS5000X Series Digital Oscilloscope Service Manual 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 40: To Verify Trigger Level

    SDS5000X Series Digital Oscilloscope Service Manual 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 Delay measurement.

  • Page 41: To Verify Ext Trigger Level

    SDS5000X Series Digital Oscilloscope Service Manual 5. Set the trigger level to 300 mV. 6. Press Measure button on the front panel of the oscilloscope to display Level@x measurement. 7. Record the value of Level@x, calculate the level error (error = 300 mV - Level@x).
  • Page 42 SDS5000X Series Digital Oscilloscope Service Manual 1. Connect channel 1 and external trigger channel of the oscilloscope to the 9500B with a BNC T connector, as shown in Figure 11. 2. Set the oscilloscope Sec/Div to 500 us/div. 3. Set the oscilloscope Volts/Div to 150 mV/div, trigger source to EXT, trigger slope to positive and coupling mode to DC.

  • Page 43: To Verify Noise Floor

    SDS5000X Series Digital Oscilloscope Service Manual 18. Disconnect the test connection. To Verify Noise Floor This test checks the noise floor of the analog channels and varies from models. In this test, do not connect any testing devices to the oscilloscope.

  • Page 44: To Verify Bandwidth

    SDS5000X Series Digital Oscilloscope Service Manual 3. Press the Measure 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. 2∗ √ 2∗stdev 5. Check if the SNR and pkpk/stdev are in the limited range shown in Table 5.
  • Page 45 SDS5000X Series Digital Oscilloscope Service Manual 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 7. Table 7 Frequency points in the test...
  • Page 46 SDS5000X Series Digital Oscilloscope Service Manual 6. After the test, calculate the dB value at every frequent point. Check if the value is in the limited range in Table 8. Table 8 Limited Range Scope Model Impedance Frequency Point (Hz) Range ≤98M...

  • Page 47: To Verify Bandwidth Limit

    SDS5000X Series Digital Oscilloscope Service Manual ≤401M (-6,0) dB ≤601M (-6,0.98) dB ≤52M (-1,0.5) dB ≤168M (-2,0.8) dB ≤301M (-2.5,1) dB SDS5054X 1 MΩ ≤384M (-3,1) dB ≤501M (-5,1) dB ≤1001M (-44,3) dB 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 48 SDS5000X Series Digital Oscilloscope Service Manual 4. Set the amplitude of the 9500B to 600 mV, 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 9.

  • Page 49: To Verify Trigger Sensitivity

    SDS5000X Series Digital Oscilloscope Service Manual 2. Check the other channels in the same way as in step1 to step 8. 3. Disconnect the test connection. To Verify Trigger Sensitivity This test checks trigger sensitivity at the frequency of 10 MHz and also at the bandwidth frequency.
  • Page 50 SDS5000X Series Digital Oscilloscope Service Manual 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, and check that it is in the specified trigger range listed in Table 11.
  • Page 51 SDS5000X Series Digital Oscilloscope Service Manual waveform. 5. Adjust the trigger level within the range of [-100 mV, 100 mV] to achieve a stable waveform and then record the (hardware- measured) frequency, located at the top right area of the screen.

  • Page 52: To Verify Channel Skew

    SDS5000X Series Digital Oscilloscope Service Manual To Verify Channel Skew This test checks the skew between two analog channels. In this test, the impedance of both the 9500B and the oscilloscope should be set to 50 Ω. Channel Skew Limit: abs(T@L) ≤ 150 ps Steps: 1.

  • Page 53: To Verify Input Impedance

    SDS5000X Series Digital Oscilloscope Service Manual To Verify Input Impedance This test checks the input impedance of all analog channels and the ext trigger channel with different coupling modes and vertical scales (100 mV/div, 200 mV/div and 2 V/div). Table 12 Input Impedance data...
  • Page 54 SDS5000X Series Digital Oscilloscope Service Manual 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 12.

  • Page 55: Disassembly Procedures

    SDS5000X Series 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.

  • Page 56: Tools Lists

    SDS5000X Series 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 lose functionality.

  • Page 57: Disassembly Procedures

    SDS5000X Series Digital Oscilloscope Service Manual Disassembly Procedures This 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. 6.3.1 To Remove the Rear Cover and Knobs...

  • Page 58: To Remove The Rear Metal Module

    SDS5000X Series Digital Oscilloscope Service Manual 6.3.2 To Remove the Rear Metal Module Figure 15 To remove the rear metal module Steps: 1. Remove the eight PM3*6 screws outside of the rear metal module. 2. Unplug the connecting cable from the mainboard.

  • Page 59: To Remove The Power Supply Module And Fan

    SDS5000X Series Digital Oscilloscope Service Manual 6.3.3 To Remove the Power Supply Module and Fan Figure 16 To remove the power supply module and Fan Steps: 1. Remove the ten PM3*6 screws outside the metal rear cover. 2. Remove the metal rear cover.

  • Page 60: To Remove The Front Panel And Rubber Keypad

    SDS5000X Series Digital Oscilloscope Service Manual 6.3.4 To Remove the Front Panel and Rubber Keypad Figure 17 To 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.

  • Page 61: To Remove The Keyboard And Probe Interface Board

    SDS5000X Series Digital Oscilloscope Service Manual 6.3.5 To Remove the Keyboard and Probe Interface Board Figure 18 To remove the 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 62: To Remove The Acquisition Board

    SDS5000X Series Digital Oscilloscope Service Manual 6.3.6 To Remove the Acquisition board Figure 19 To 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 63: To Remove The Lcd Module And Lcd Interface Board

    SDS5000X Series Digital Oscilloscope Service Manual 6.3.7 To Remove the LCD Module and LCD Interface Board Figure 20 To 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.

  • Page 64: Solving General Problems

    SDS5000X Series Digital Oscilloscope Service Manual Solving General Problems This chapter includes 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 ...
  • Page 65 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. If the display still stuck at the logo screen, contact SIGLENT for ...
  • Page 66 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  instructions. If there is an unexpected trace when no input connected to channel input Power cycle the oscilloscope.

  • Page 67: Troubleshooting

    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. WARNING HAZARDOUS VOLTAGES In case maintenance is performed with power supply on and without protective covers.

  • Page 68: Required Equipment

    Troubleshooting Flowchart The following flowchart describes how to troubleshoot the oscilloscope in the most general case. This does not guarantee a 100% recovery of all possible hardware failures. Contact SIGLENT if you cannot solve the problem. 68 / 88 WWW.SIGLENT.COM...
  • Page 69 SDS5000X Series Digital Oscilloscope Service Manual 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 69 / 88...

  • Page 70: To Check The Power Supply Module

    SDS5000X Series 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 71: To Check The Acquisition Board

    SDS5000X Series 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 21 Pin definition of the power supply connector (J24) Figure 22 Pin definition of the power control bus connector (J22)

  • Page 72: Acquisition Board Sdy8.007.163

    SDS5000X Series 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 73 SDS5000X Series 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 23 Acquisition Board Power Supply Distribution WWW.SIGLENT.COM 73 / 88...
  • Page 74 SDS5000X Series Digital Oscilloscope Service Manual Figure 24 Test points for the Acquisition board power supplies Figure 25 Test points for the Acquisition board power supplies (continued) 74 / 88 WWW.SIGLENT.COM...
  • Page 75 SDS5000X Series Digital Oscilloscope Service Manual Figure 26 Test points for the Acquisition board power supplies (continued) Table 15 Voltage parameters of the Acquisition System power supplies Number Net Name Test Point Tolerance VCC12V6 +12.6V ± 400mV ���� ���� +1.0 V ±...
  • Page 76 SDS5000X Series Digital Oscilloscope Service Manual VREF_DDR_C TP67 +0.75 V ± 22.5mV ���� ���� 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 77 SDS5000X Series Digital Oscilloscope Service Manual VCC-13V5 TP48 -13.5 V ± 400mV ���� ���� VCC-10V5_FE TP143 -10.5 V ± 300mV ���� ���� -12 V ± 360mV VCC-12V_PROBUS TP130 ���� ���� VCC12V_PROBUS TP49 +12 V ± 3600mV ���� ���� VCC1V8_FE TP134 +1.8 V...

  • Page 78: Acquisition Board Sdy8.007.140

    SDS5000X Series Digital Oscilloscope Service Manual High level indicates PLL locked Reference Clock TP43 LVCMOS33 Low level means PLL lock Locked 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 79 SDS5000X Series Digital Oscilloscope Service Manual power up successfully. If you cannot hear the click or there is no sign that the acquisition board is powering up, go to To Check the Power Supply Module section to check the stand-by power and the main power.
  • Page 80 SDS5000X Series Digital Oscilloscope Service Manual Figure 29 Test points for the Acquisition board power supplies Figure 30 Test points for the Acquisition board power supplies (continued) 80 / 88 WWW.SIGLENT.COM...
  • Page 81 SDS5000X Series Digital Oscilloscope Service Manual Figure 31 Test points for the Acquisition board power supplies (continued) Table 17 Voltage parameters of the Acquisition System power supplies Number Net Name Test Point Tolerance VCC12V6 +12.6V ± 400mV ���� ���� VCC1V0A C1046 +1.0 V...
  • Page 82 SDS5000X Series Digital Oscilloscope Service Manual VREF_DDR_C TP67 +0.75 V ± 22.5mV ���� ���� 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 83: To Check The Processor Board

    SDS5000X Series Digital Oscilloscope Service Manual using the method below. Figure 32 Test points for clock Table 18 Clock parameters of the Acquisition System Test Point Clock Domain Level Description TP44 PLL Reference Clock LVCMOS33 Typical 10 MHz High level indicates PLL locked...

  • Page 84: Check The Clock

    SDS5000X Series Digital Oscilloscope Service Manual Figure 33 Test points for the processor power supplies Table 19 Voltage parameters of the processor power supplies Net Name Test Point Tolerance +1.0 V ± 50mV DVCC1V0_ZYNQ ���� ���� DVCC1V8_ZYNQ +1.8 V ± 50mV ����...

  • Page 85: To Check The Lcd

    SDS5000X Series Digital Oscilloscope Service Manual Figure 34 Test points for clock Table 20 Clock 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...

  • Page 86: To Check The Lcd Power Supply

    SDS5000X Series 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.
  • Page 87 SDS5000X Series Digital Oscilloscope Service Manual Figure 36 Test points for LCD signal Table 22 Signal 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.
  • Page 88 SDS5000X Series Digital Oscilloscope Service Manual 88 / 88 WWW.SIGLENT.COM...

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