SIGLENT SDS1000X-E Series Service Manual
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SIGLENT SDS1000X-E Series Service Manual

Digital oscilloscope
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SIGLENT
SDS1000X-E Series
Digital Oscilloscope
Service Manual
SM0101E-E01A
SDS1000X-E Service Manual I

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Summary of Contents for SIGLENT SDS1000X-E Series

  • Page 1 SIGLENT SDS1000X-E Series Digital Oscilloscope Service Manual SM0101E-E01A SDS1000X-E Service Manual I...
  • Page 2 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.

  • Page 3: General Safety Summary

    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 this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injuries Use Proper Power Cord.
  • Page 4 Do Not Operate With Suspected Problems. If you suspect damage has occurred to this instrument, have it inspected by qualified service personnel before further operation. Any maintenance, adjustment or replacement, especially to the circuits or accessories should be performed by SIGLENT authorized personnel. Keep Product Surfaces Clean and Dry.

  • Page 5: Table Of Contents

    If the display stuck at logo graph ................... 66 If there is no trace display ...................... 66 If the baseline trace drift out of specification ................. 67 If there is an unexpected trace when no input connected to channel input ......67 WWW.SIGLENT.COM...
  • Page 6 To Check the Power Supply Module ................78 To Check the Main Board ..................... 79 To Check the Processor System ..................80 To Check the Acquisition System ................. 81 To Check Other Power Supplies ................... 82 To Check the LCD ......................83 WWW.SIGLENT.COM...

  • Page 7: General Features

    SDS1000X-E Service Manual General Features SIGLENT‟s new SDS1000X-E Super Phosphor Oscilloscopes feature two channel and four channel models. The two channel model is available with a 200 MHz analog bandwidth (model SDS1202X-E), a single ADC with a 1 GSa/s maximum sample rate, and a single memory module with 14Mpts of sample memory.
  • Page 8 The features and performance of SIGLENT‟s new SDS1000X -E cannot be matched anywhere else in this price class. The four channel series includes even more functions, including: searching...
  • Page 9  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 WWW.SIGLENT.COM...

  • Page 10: Prepare Information

    The functional checking details four types of checks used to determine if the oscilloscope is operating properly. Power-on Inspection The power requirements of the oscilloscope are 100-240 V, 50/60Hz or 100-120 V, 400Hz. Please use the power cord supplied with the accessories to connect the oscilloscope to the power source. WWW.SIGLENT.COM...
  • Page 11 6 seconds simultaneously, until the boot screen appears. The oscilloscope will then begin to perform its power-on tests automatically, after which the Default button can be pressed in order to recall the factory default settings. WWW.SIGLENT.COM...

  • Page 12: Probe Compensation

    Compensation Signal Output Terminal Ground Terminal 2-channel scope Ground Terminal Compensation Signal Output Terminal 4-channel scope 3. Press Auto Setup 4. Observe waveform on the screen. The displaying should be a square waveform as shown in the figure below: WWW.SIGLENT.COM...
  • Page 13 SDS1000X-E Service Manual Under Compensated Over Compensated 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. WWW.SIGLENT.COM...

  • Page 14: Auto Setup

     The input signal frequency must be higher than 20 Hz, with the amplitude greater than 8 mV.  Select the channel with the lowest frequency when several channels are connected to signals. WWW.SIGLENT.COM...

  • Page 15: Self Calibration

    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 the calibration interface. WWW.SIGLENT.COM...

  • Page 16: Interface Test

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

  • Page 17: Usb Device Test

    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. WWW.SIGLENT.COM...
  • Page 18 SDS1000X-E Service Manual WWW.SIGLENT.COM...

  • Page 19: Lan Port Test

    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. WWW.SIGLENT.COM...
  • Page 20 SDS1000X-E Service Manual 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. WWW.SIGLENT.COM...

  • Page 21: Pass/Fail Out Test

    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 SDS1000X-E screen will appear as in Figure 6: WWW.SIGLENT.COM...
  • Page 22 (Figure 7). 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 7 Pulse Waveform WWW.SIGLENT.COM...

  • Page 23: Performance Test

    Approx.1m long DCG\Offset\Ext Trigger BNC T Connectors For signal distribution level Ext Trigger delay\ Terminal Load 50 ohm BW\BWL\trigger sensitivity Computer The figures below show the interconnections between the test equipment and PC to the oscilloscope under test (Table 3): WWW.SIGLENT.COM...
  • Page 24 9500B SDS1004X-E GPIB BNC CABLE Figure 8 Connecting test instruments for DCG\Offset 9500B SDS1004X-E GPIB BNC CABLE Figure 9 Connecting test instruments for Clock\Trigger Delay 9500B SDS1004X-E GPIB 50ohm BNC CABLE Figure 10 Connecting test instruments for BW\BWL\Trigger Sensitivity WWW.SIGLENT.COM...
  • Page 25 The figures below show the interconnections between the test equipment and PC to the SDS1002X-E for Ext Trigger test: 9500B SDS1002X-E GPIB 50oh 50oh BNC CABLE Figure 12 Connecting test instruments for Ext Trigger Delay 9500B SDS1002X-E GPIB BNC CABLE Figure 13 Connecting test instruments for Ext Trigger Level WWW.SIGLENT.COM...
  • Page 26 SDS1000X-E Service Manual 9500B SDS1002X-E GPIB 50oh BNC CABLE Figure 14 Connecting test instruments for Ext Trigger Sensitivity WWW.SIGLENT.COM...
  • Page 27 Test located in the Test Record. Self Calibration The Self Calibration procedure is described in Chapter "Self Calibration". If the environmental temperature changes by more than 5℃, the Self Calibration operation must be performed in order to achieve the specifications. WWW.SIGLENT.COM...

  • Page 28: To Verify Dc Gain Accuracy

    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% 600 mV, 300 mV,0,-300 mV,-600 200 mV/div WWW.SIGLENT.COM...
  • Page 29 7. Set the Memory Depth to 1.4 Mpts and turn on channel 2, then the sample rate will be automatically set to 250 MSa/s. 8. Repeat steps 5 to 6. 9. Turn the 9500B output off. 10. Disconnect the connection to the channel. Table 5 DC Gain Accuracy in Different Sampling Rate WWW.SIGLENT.COM...
  • Page 30 SDS1000X-E Service Manual DC Gain Volt/Div Sampling Rate DC voltage output Accuracy error ± 3% 500 mV/div 1 GSa/s 1.5 V,-1.5 V ± 3% 500 mV/div 250 MSa/s 1.5 V,-1.5 V WWW.SIGLENT.COM...

  • Page 31: To Verify Offset Accuracy

    8. Set the oscilloscope Volts/Div to the other settings in Table 6, and repeat the steps 4 to 6. 9. Turn the 9500B output off. 10. Disconnect the connection to all the channels. Table 6 Offset Accuracy Slope Zero Volt/Div Offset error input(V) 10 V/div 35 V,30 V,0,-3 0V,-35 V ±1.5% ±1.202 WWW.SIGLENT.COM...
  • Page 32 50 mV/div 200 mV,100 mV,0,-100 mV,-200 ±1.5% ±0.0044 20 mV/div 10 mV/div 100 mV, 50 mV,0,- 50 mV,-100 ±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 WWW.SIGLENT.COM...

  • Page 33: To Verify Time Base Accuracy

    (20 MHz) which is equal to the sample rate of the oscilloscope. 7. Press Measure button on the front panel of the oscilloscope to display Freq measurement. 8. Check if the Freq measurement is less than 500 Hz. 9. Disconnect the test connection. WWW.SIGLENT.COM...

  • Page 34: To Verify Trigger Delay

    5. Press Measure button on the front panel of the oscilloscope to display Time@Level measurement. 6. Check if the result is in the limited range above. 7. Disconnect the test connection. 8. Check other channels in the same way as steps 1 to 7. WWW.SIGLENT.COM...

  • Page 35: To Verify Ext Trigger Delay

    7. Press Measure button on the front panel of the oscilloscope to display Delay measurement. 8. Check if the delay is within the limited range above (≤ 1 ns). 9. Disconnect the test connection. 10. Check the other analog channel in the same way as steps 1 to 9. WWW.SIGLENT.COM...

  • Page 36: To Verify Ext Trigger Level

    6. Check if the trigger level is in the limited range above. 7. Set amplitude of the 9500B to 4V, set trigger source of the oscilloscope to EXT/5, and the Volts/div to 1 V. 8. Repeat step 5 to step 6. 9. Disconnect the test connection. WWW.SIGLENT.COM...

  • Page 37: To Verify Noise Floor

    Table 9 Noise Floor Limited Range for 4-Channel pkpk/stdev pkpk/stdev Volt/Div Limited Limited Volt/Div Limited Limited Range Range Range Range 500 uV [0,12] [19,55] 100 mV [0,12] [36,55] 1 mV [0,12] [25,55] 200 mV [0,12] [36,55] 2 mV [0,12] [27,55] 500 mV [0,12] [36,55] WWW.SIGLENT.COM...
  • Page 38 Table 9. 12. Check the other analog channels in the same way as steps 1 to 5. 13. Set the oscilloscope Volts/Div to the others in the table above, and repeat the steps 3 to 5. WWW.SIGLENT.COM...

  • Page 39: To Verify Bandwidth

    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. WWW.SIGLENT.COM...
  • Page 40 SDS1000X-E Service Manual Table 11 Limited Range Scope Model Frequency Point (Hz) Range ≤20M (-1,1) dB ≤100M (-2,2) dB SDS1204X-E/ 100M< ≤200M (-3,2) dB SDS1202X-E >200M (-4,2) dB 250M (-6,2) dB WWW.SIGLENT.COM...

  • Page 41: To Verify Bandwidth Limit

    Limit of the oscilloscope pass. 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 WWW.SIGLENT.COM...
  • Page 42 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. WWW.SIGLENT.COM...

  • Page 43: To Verify Trigger Sensitivity

    Set Sec/Div to 2 ns/div if you are testing SDS1204X-E/SDS1202X-E. Then repeat steps 4 to 8. 10. Check the other channels in the same way as steps 1 to 9. 11. Disconnect the test connection. The steps above are for testing the trigger level when using internal trigger WWW.SIGLENT.COM...
  • Page 44 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. WWW.SIGLENT.COM...

  • Page 45: To Verify Input Impedance

    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 14. WWW.SIGLENT.COM...

  • Page 46: Disassembly Procedures

    ESD mat and wear a properly grounded ESD strap. CAUTION REMOVE 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. WWW.SIGLENT.COM...

  • Page 47: Tools Lists

    SDS1000X-E Service Manual 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 WWW.SIGLENT.COM...

  • Page 48: Disassembly Procedures

    Removing the Front-Panel Knobs Figure 15 Removing the front panel knobs Removing steps: Removing each front-panel knobs by firmly grasping the knob(with pliers protected by a soft cloth to prevent scratches, if necessary) and pulling it away from the front panel. WWW.SIGLENT.COM...
  • Page 49 1. Placing the oscilloscope face down on a soft surface such as an anti-static mat. 2. Removing the two PM3*10 screws on the rear panel. Removing the two KM3*6screws under the tilt-legs in this same position. 3. Lifting the rear cover up and off carefully. WWW.SIGLENT.COM...
  • Page 50 1. Placing the oscilloscope face down on a soft surface such as an anti-static mat. 2. Removing thetwoKM3*6screws onside of the rear metal shield. 3. Removing the rear metal shield. 4. Removing thetwoKM3*6screws on top of metal shield. 5. Removing the top metal shield. WWW.SIGLENT.COM...
  • Page 51 Removing the Power Supply Module and (Optionally) the Fan Power Cord Connector Power Supply Module 2*M4*8 Figure 18 Removing the power supply module Insulating Mat Figure 19 Removing the insulating mat Removing steps: 1. Removing the two M4*8 screws on the power cord connector. WWW.SIGLENT.COM...
  • Page 52 4. Removing the power supply module. 5. Removing the two PM3*6 on the insulating mat. 6. Disconnecting the cable of the fan on the main board. 7. Optionally removing the four KM3*32 screws and nuts on the fan and removing the fan. WWW.SIGLENT.COM...
  • Page 53 1. Placing the oscilloscope back-side down on a soft surface such as an anti-static mat. 2. Disconnecting the keyboard cable and the LCD panel cable on the main board. 3. Removing the six PC3*8 screws on the metal frame. 4. Removing the front cover. WWW.SIGLENT.COM...
  • Page 54 SDS1000X-E Service Manual Removing the Main board Figure 21 Removing the BNC nuts and gaskets Figure 22 Removing the main board Removing steps: WWW.SIGLENT.COM...
  • Page 55 SDS1000X-E Service Manual 1. Removing the three BNC nuts and gaskets on the front side of the metal frame. 2. Removing the five PM3*6 screws on the main board. 3. Removing the main board. WWW.SIGLENT.COM...
  • Page 56 3. Removing the master keyboard. 4. Removing the six PC3*8 screws on the slave keyboard. 5. Removing the slave keyboard. 6. Removing the four screws and gaskets on the LCD panel. 7. Removing the LCD panel and the antiglare glass panel. WWW.SIGLENT.COM...

  • Page 57: 4-Channel Module

    Removing the Front-Panel Knobs Figure 24 Removing the front panel knobs Removing steps: Removing each front-panel knob by firmly grasping the knob(with pliers protected by a soft cloth to prevent scratches, if necessary) and pulling it away from the front panel. WWW.SIGLENT.COM...
  • Page 58 1. Placing the oscilloscope face down on a soft surface such as an anti-static mat. 2. Removing the four PM3*6 screws located on the rear panel. Removing the two PM3*6screws under the tilt-legs in this same position. 3. Lifting the rear cover up and off carefully. WWW.SIGLENT.COM...
  • Page 59 5. Lifting the rear metal shield a little bit to have the access to disconnect the power cable and fan cable on the main board. Be caution about the latching type power cable connector. 6. Removing the rear metal shield completely. WWW.SIGLENT.COM...
  • Page 60 3. Removing the six PC3*6 screws on the power supply module shield. 4. Removing the power supply module shield (without disconnecting the power cable on the module since disconnecting the latching type connector is tricky under the shield). 5. Disconnecting the power cable on the power supply module. WWW.SIGLENT.COM...
  • Page 61 SDS1000X-E Service Manual 6. Removing the four PC3*6 screws on the power supply module. 7. Removing the power supply module. 8. Optionally removing the four PM3*32 screws and nuts on the fan and then removing the fan. WWW.SIGLENT.COM...
  • Page 62 1. Placing the oscilloscope back-side down on a soft surface such as an anti-static mat. 2. Disconnecting the keyboard cable and the LCD panel cable on the main board. 3. Removing the six PC3*6 screws on the metal frame. 4. Removing the front cover. WWW.SIGLENT.COM...
  • Page 63 SDS1000X-E Service Manual Removing the Main Board Figure 29 Removing the BNC nuts and gaskets WWW.SIGLENT.COM...
  • Page 64 SDS1000X-E Service Manual Figure 30Removing the main board Removing steps: 1. Removing the four BNC nuts and gaskets on the front side of the metal frame. 2. Removing the twelve PM3*6 screws on the main Board. 3. Removing the main board. WWW.SIGLENT.COM...
  • Page 65 3. Removing the master keyboard. 4. Removing the five PC3*8 screws on the slave keyboard. 5. Removing the slave keyboard. 6. Removing the four screws and gaskets on the LCD panel. 7. Removing the LCD panel and the antiglare glass panel. WWW.SIGLENT.COM...

  • Page 66: Solving General Problems

     Wait ten minutes to see if the oscilloscope can boot successfully. If not, contact SIGLENT for further instructions. If is, try to upgrade to newest firmware to solve the problem.  If the display still stuck at logo graph, contact SIGLENT for further instructions. If there is no trace display Check the acquisition is running and trigger status is Trig’d or Auto.

  • Page 67: If The Baseline Trace Drift Out Of Specification

     Check that the vertical position setting is working.  Do a self-calibration following the procedures in the User Guide. If self-calibration does not work, contact SIGLENT for further instructions. If there is an unexpected trace when no input connected to channel input ...

  • Page 68: Troubleshooting

    Only qualified personnel should perform the troubleshooting procedures. Disconnect the power cord whenever possible. DO NOT try to troubleshoot if visible damage is detected on the power supply module and the main board, return it to SIGLENT for further repair. WARNING HAZARDOUS VOLTAGES Maintenance is performed with power supply on and without protective covers.

  • Page 69: Required Equipment

    200MHz BW SIGLENT SDS1204X-E 1MΩ impedance Troubleshooting 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. WWW.SIGLENT.COM...
  • Page 70 SDS1000X-E 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...

  • Page 71: For 2-Channel Module

    Table 16 Voltage parameters of the power supply module Definition Tolerance Pin 1, Pin 5, NULL Pin 8, Pin 12 +6.5 V ± 10% Primary Power Pin3, Pin 4 ���� ± 100mV Positive Auxiliary Pin 6, Pin 7 +3.4V ���� ���� WWW.SIGLENT.COM...

  • Page 72: To Check The Main Board

    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 the main power.  If the power or the signal under test is abnormal, replace the main board. WWW.SIGLENT.COM...

  • Page 73: To Check The Processor System

    DVCC2V5_ZYNQ TP79 ���� ���� Check the clock  Locate the three oscillators X1, X2 and X3, use an oscilloscope to measure the clock signal using the method below. R372 R334 R371 R229 R205 Figure 34 Test points for clock WWW.SIGLENT.COM...

  • Page 74: To Check The Acquisition System

    AVCC5V0_VGA TP80 ���� ���� +5.0 V ± 100mV AVCC5V0 TP75 ���� ���� -5.0 V ± 200mV AVEE-5V0 TP72 ���� ���� Check the clock  Locate the oscillator X4, use an oscilloscope to measure the clock signal using the method below. WWW.SIGLENT.COM...

  • Page 75: To Check Other Power Supplies

    Stand-by power for power on +5 V ± ���� VCC5V0 TP77 circuits and power source for 100mV ���� USB host VBUS ± +6.5 Main power VCC6V5 ±10% FAN_PWR -10V Power supply for fan Positive power supply for TDC ±10% VCC15V0 +15V circuits WWW.SIGLENT.COM...

  • Page 76: To Check The Lcd

    ���� VLEDP_LCD ZC16 ����  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 the signal using the method below. WWW.SIGLENT.COM...
  • Page 77 LVCMOS33 27.5 MHz ± 1% R420 LCD_DCLK LCD_VSYNC LVCMOS33 50 Hz ± 1% R422 LCD_HSYNC LVCMOS33 26 kHz ± 1% R423  If the signal is good, replace the LCD panel.  If the signal is dead, replace the main board. WWW.SIGLENT.COM...

  • Page 78: For 4-Channel Module

    Table 24 Voltage parameters of the power supply module Cable Definition Tolerance Color Pin 4, Pin5, Black NULL Pin 6 +6.5 V ± 10% Primary Power Pin 1, Pin 2 ���� +15 V ± 10% Positive Auxiliary Pin 8 Blue ���� WWW.SIGLENT.COM...

  • Page 79: To Check The Main Board

    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 the main power.  If the power or the signal under test is abnormal, replace the main board. WWW.SIGLENT.COM...

  • Page 80: To Check The Processor System

    R208 R209 R205 R203 Figure 42 Test points for clock Table 26 Clock parameters of the Processor System Test Frequency Tolerance Clock Domain Level Point ± 33.333333 R203 Processor Reference LVCMOS33 50PPM ± R204 USB Host Reference LVCMOS33 24.000000 WWW.SIGLENT.COM...

  • Page 81: To Check The Acquisition System

    Test Point Tolerance ± 50mV VCC1V8_ADC0 TP18 +1.8V ���� ���� +1.8 V ± 50mV VCC1V8_ADC1 TP19 ���� ���� ± 100mV AVCC3V3 TP15 +3.3V ���� ���� ± 100mV AVCC5V0_VGA TP13 +5.0V ���� ���� ± 100mV AVCC5V0 TP12 +5.0V ���� ���� WWW.SIGLENT.COM...

  • Page 82: To Check Other Power Supplies

     Find and measure those test points using a multi-meter. TP22 VCC3V3_PWR TP16 DVCC5V0_USB TP25 VCC6V5 TP14 FAN_PWR VCC6V5_MSO TP21 VEE-6V5 Figure 45 Test points for other power supplies Table 29 Voltage parameters of other power supplies Net Name Test Tolerance Comments WWW.SIGLENT.COM...

  • Page 83: To Check The Lcd

     Find and measure those test points using a multi-meter. VLEDP_LCD TP11 VCC10V4_LCD TP10 VEE-6V8_LCD VCC16V_LCD Figure 46 Test points for the LCD power supplies Table 30 Voltage parameters of the LCD power supplies Test Net Name Tolerance Point WWW.SIGLENT.COM...
  • Page 84 Frequency Tolerance LVCMOS33 27.5 MHz ±1% R420 LCD_DCLK LCD_VSYNC LVCMOS33 50 Hz ±1% R422 LCD_HSYNC LVCMOS33 26kHz ±1% R423  If the signal is good, replace the LCD panel.  If the signal is dead, replace the main board. WWW.SIGLENT.COM...

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