MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes
Contents
1. Figure and Serial Serial index Tektronix no no no part no effective discont d Qty Name and description 9 REAR CHASSIS POWER SUPPLY I O BOARD 1 119 7597 00 1 POWER SUPPLY ROHS COMPLIANT SAFETY CONTROLLED 2 211 1272 00 15 SCREW MACHINE 6 32 x 0 250 PNH STL ZNPL T 15 TORX DRIVE M DISTRIBUTION OF THE 211 1272 00 SCREWS 1 screw attaches the I O board to the rear chassis 4 screws attach the Power supply circuit board to the Power supply bracket 4 screws attach the Power supply bracket to the rear chassis 2 screws attach the line filter to the rear chassis 4 screws attach the system fan 12 to the rear chassis 3 407 5462 00 1 BRACKET POWER SUPPLY BOARD MOUNT 4 878 0278 01 1 0 BOARD ASSEMBLY 5 119 7086 00 1 FILTER EMI AC LINE CONNECTOR 6 441 2609 00 1 CHASSIS ASSEMBLY REAR 7 131 6417 00 1 CONTACT ELEC GROUNDING 0 600 L X 0 250 W X 0 220 D ELECTROLESS NICKEL PLATE 8 214 3903 00 2 SCREW JACK 4 40 X 0 312 LONG 0 188 H HEX HEAD STAND OFF 9 210 1039 00 2 WASHER LOCK 0 521 ID INT 0 025 THK STEEL ZINC FINISH 10 220 0265 00 2 NUT PLAIN HEX 0 5 28 X 0 625 11 065 0861 00 1 SYSTEM FAN ASSEMBLY 120 MM TUBEAXIAL 12 VDC SAFETY CONTROLLED WITH BRACKET 12 335 1910 00 1 MARKER IDENT SERIAL NUMBER LABEL 13 335 2248 00 1 LABEL IO REAR MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 37 Replaceable Parts List Figure 92. CRE N BEY Main board s bu 1 0 board s Display System fan assembly NN Analog board Front chassis Front panel board 0512 007 Figure 3 Module locator 24 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Troubleshooting AN Adjustment After Repair Required Tools and Equipment Test Points Maintenance This section contains information and procedures to help you isolate a defective module in the MSO4000B Series and DPO4000B Series oscilloscopes WARNING Before performing this or any other procedure in this manual read the General Safety Summary and Service Safety Summary found at the beginning of this manual and to prevent possible injury to service personnel or damage to electrical components read Preventing ESD See page 19 Preventing ESD If you replace any circuit board assembly you must adjust the instrument after repair Refer to the Adjustment Procedures section for information about the adjustment See page 7 Adjustment Procedure You need the following equipment to troubleshoot the instrument Tools and Equipment Example DMM 3 5 digits or above Test points on the Main board are shown in the troubleshooting illustration See Figure 5 Troubleshooting Procedure The following figures are troubleshooting procedure flowcharts Use them to troubleshoot an instrument failure Begin with the Pr
3. NOTE If after performing steps 1 and 2 a module is clean upon inspection skip the following steps If there is still dust or dirt on the module the oscilloscope may be spray washed using a solution of 75 isopropyl alcohol by following these steps a Spray wash dirty parts with isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate b Use hot 120 F to 140 F deionized water to thoroughly rinse them c Dry all parts with low pressure deionized air d Dry all components and assemblies in an oven or drying compartment using low temperature 125 F to 150 F circulating air There is no periodic lubrication required for this oscilloscope MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Maintenance Module Removal WARNING Only qualified personnel should perform service procedures Before performing this or any other procedure in this manual read the General Safety Summary and Service Safety Summary located at the beginning of this manual Also to prevent possible injury to service personnel or damage to electrical components read Preventing ESD See page 19 Preventing ESD To work on the instrument place it face down in its protective front cover You can remove the tabs from the cover if you want to make it easy to move the instrument in and out of the cover while working on it Figure 2 Removing tabs from the front protective cover To
4. To Avoid Fire or Personal Injury iv Review the following safety precautions to avoid injury and prevent damage 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 Use proper power cord Use only the power cord specified for this product and certified for the country of use Connect and disconnect properly Do not connect or disconnect probes or test leads while they are connected to a voltage source Connect and disconnect properly De energize the circuit under test before connecting or disconnecting the current probe Ground the product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe all terminal ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Connect the probe reference lead to earth ground only Do not apply a potential to any terminal including the common terminal that exceeds the maximum rating of that terminal Power disconnect The power cord disconnects the product from the power source Do not block the power cord it
5. 7 Avoid handling circuit boards in areas that have a floor or work surface covering capable of generating a static charge Inspection and Cleaning Inspection and cleaning are done as preventive maintenance Preventive maintenance when done regularly may prevent oscilloscope malfunction and enhance its reliability Preventive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 19 Maintenance General Care How often you do maintenance depends on the severity of the environment in which the oscilloscope is used A proper time to perform preventive maintenance is just before oscilloscope adjustment The cabinet helps keep dust out of the oscilloscope and should normally be in place when operating the oscilloscope WARNING To avoid injury power off the instrument and disconnect it from line Flat Panel Display Cleaning voltage before performing any procedure that follows The display is a soft plastic display and must be treated with care during cleaning CAUTION Improper cleaning agents or methods can damage the flat panel Exterior Cleaning display Avoid using abrasive cleaners or commercial glass cleaners to clean the display surface Avoid spraying liquids directly on the display surface Avoid scrubbing the display with excessive force Clean the flat pan
6. Rear chassis and connecting modules MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 38 Table 7 Replaceable parts external parts Replaceable Parts List Figure and Serial Serial index Tektronix no no no part no effective discontd ty Name and description 10 EXTERNAL PARTS 1 200 5130 00 1 FRONT PROTECTIVE COVER 2 065 0856 00 1 REAR CASE ASSEMBLY 3 211 1272 00 4 SCREW MACHINE 6 32 x 0 250 PNH STL ZNPL T 15 TORX DRIVE Figure 10 External parts 0512 004 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 39 Replaceable Parts List Table 8 Replaceable parts cable and connectors rear chassis Figure and Serial Serial index Tektronix no no no part no effective discont d ty Name and description 11 CABLES REAR CHASSIS 1 174 5835 00 1 CABLE ASSEMBLY LINE INPUT 2 343 1736 00 2 CLAMP CABLE J340 From System fan Figure 11 Rear chassis showing cables and connectors 40 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Table 9 Replaceable parts cable and connectors Main board Figure and Serial Serial index Tektronix no no no part no effective discontd Qty Name and description 12 Cable Main Board 1 174 5809 00 1 CABLE MAIN BOARD TO FRONT PANEL BOARD 2 346 0120 0
7. Series Digital Phosphor Oscilloscopes Service Manual 29 Maintenance 30 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List This chapter contains a list of the replaceable modules for the DPO4000B and MSO4000B Series Oscilloscopes Use this list to identify and order replacement parts Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements Therefore when ordering parts it is important to include the following information in your order Part number see Part Number Revision Level below Instrument type or model number m Instrument serial number Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Part Number Revision Tektronix part numbers contain two digits that show the revision level of the Level part For some parts in this manual you will find the letters XX in place of the revision level number Part Number Revision Level Revision Level May Show as XX A A 670 7918 03 670 7918 XX When you order p
8. a TEE T TORE T Eres Ee T UEEUU NES VI tomes sd TERQUE vi luc nena vii SERIES ng IRR vii Where to Find Operating Information ssssssssssssssssssee eem e menm meses 1 Theory of Operations sc scadsedc ra acwsvancesdea cot a E eme Ea E a ESERE 3 Power SUpDly ussese eese eeo eE an EEE AEE EE do re E pta etus ere EEEO 3 leg ponasa i rnern i E EE E E EE E E EE E NESS 3 Main Board and Analog Board 0c cece ese e eee e eee een eee ee ne seme mene hene 3 Front Panel Board descen oet E de SE ote ek eus EE tpe e adul e e Miet eee 4 Adjustment Procedure secet nta Ru ee ex ee a E red EN aae Ra EENEN e ea RE Ra ie 7 Required Equipment 5 o eere eden ene c e Se T ud UD eoo Eu Ewa ches ERR E EE EY token 7 Before Adjustments ncnaisieusnacdeeseone sarees rode dae hne P DNE Dex Feb RR ERERRRTE SE ree dudewuet RISS 8 Navigating During Adjustments 00 ccc ccc ccc ene eee nee ese emen emen esee 8 Connecting the Equipment sooo eir I roa EATER E trae ee TU E REA E EREE EES 9 Factory Adjustment Procedure ccc cece cece cece een eee ene eee sees een enne 10 Setting the Calibrator Output Signal ccc cece ccc cece ees e e menn 13 Maintenance sis esisser eer ETE RESET E RENZAS DERART ERU ENSE ISGaS REST Td TU E RAN EEE Te RS 19 Preventing ESD escroa in a EANET E N N E EOS 19 Inspection and Cleaning ienne e re o EEE EE EEE eee EREET S 19 Module Removal 2 e ette
9. caused during shipping If you have not already done so carefully remove the oscilloscope and its accessories from the shipping carton and inspect them for damage Save the shipping carton for repacking or storage Repacking Use a corrugated cardboard shipping carton having a test strength of at least 275 pounds 125 kg and with an inside dimension at least six inches 15 25 cm greater than the instrument dimensions If the instrument is being shipped to a Tektronix Service Center enclose the following information m The owner s address B Name and phone number of a contact person B Type and serial number of the instrument m Reason for returning B Acomplete description of the service required Seal the shipping carton with an industrial stapler or strapping tape Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations See www tektronix com service to find a service center near you Storage The oscilloscope should be stored in a clean dry environment The following environmental characteristics apply for both shipping and storage m Temperature range 4 F to 140 F 20 C to 60 C m Altitude To 30 000 feet 9144 m See the Tektronix MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Specifications and Performance Verification Technical Reference for a complete listing of the environmental specifications MSOA000B and DPO4000B
10. remove as assembly refer to the module locator illustration See Figure 3 on page 24 You can also refer to the exploded view diagrams and parts lists See page 31 Replaceable Parts List The parts lists show how many of each type of screw is used to attach each replaceable module If you are disassembling the instrument for cleaning refer to the Inspection and Cleaning procedure for instructions See page 19 Inspection and Cleaning N WARNING Before doing any procedure in this subsection disconnect the power cord from the line voltage source Failure to do so could cause serious injury or death Required Equipment You will need a Torx driver with a T 15 Torx tip to remove instrument screws MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 23 Maintenance To Remove Modules To remove any of the instrument modules or assemblies you must first remove the rear cover and separate the front chassis from the rear chassis To remove the Front Panel board assembly or the front panel case assembly you must first remove the Main board assembly the Analog board assembly and the front chassis To remove or install the keypad do not touch the switch contacts with your fingers The oils on your fingers will degrade or damage the switch contacts To help prevent damage to the keypad use cotton gloves when removing or installing the keyboard pad Rear chassis N Rear case Power supply
11. the exploded view Number illustrations that precede the list 2 Tektronix Part Use this part number when ordering replacement parts from Tektronix Number 3 and 4 Serial Number Column three indicates the serial number at which the part was first effective Column four indicates the serial number at which the part was discontinued No entries indicates the part is good for all serial numbers 5 Qty This indicates the quantity of parts used 6 Name amp Description An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Exploded Views Figures 5 1 through 5 8 on the following pages show the module level exploded views of the DPO4000B Series and the MSO4000B Series oscilloscopes Each exploded view is indexed by the numbers in the figure 32 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Table 4 Replaceable parts Front Panel assembly Replaceable Parts List Fig amp Tektronix Serial Serial index part no no number number effective disconttd Qty Name amp description T FRONT PANEL ASSEMBLY 1 065 0854 00 1 FRONT CASE ASSEMBLY MS04000B SERIES 065 0855 00 1 F
12. you need to go back multiple steps b Ifthe oscilloscope fails a step refer to Troubleshooting at the end of this section to fix the problem and then repeat the previous step c Ifa step fails twice return to the first step in the adjustment procedure and try the entire procedure again If the procedure still fails it could indicate a problem with the oscilloscope Contact Tektronix for technical support see the contact information at the beginning of this manual 8 When the adjustment procedure is complete the factory dialog box appears showing the updated time and date of the last successful adjustment This completes the adjustments 9 Use the Performance Verification procedure to verify that the adjustment procedure correctly adjusted the oscilloscope to operate within specifications See the MSO4000B and DPO4000B Series Oscilloscopes Specifications and Performance Verification Technical Reference manual which is available at www tektronix com manuals 12 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedure Setting the Calibrator Output Signal This section tells how to set the calibrator for the DC Voltage Time Mark Deskew and Sine signals that are required by the adjustment procedure DC Voltages Use one of the following three methods to set the DC voltage to 0 V to any voltage into 1 MQ or lt 5 5 V into 50 Q or to voltages over 5 5 V into 50 Q For 0 V Comple
13. 0 1 STRAP TIEDOWN 5 5 L MIN PLASTIC WHITE J1201 J601 Front panel board J301 0512 006 Figure 12 Main board showing cable and connectors MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 41
14. ELASTOMERIC UTILITY 12 407 2567 00 1 BRACKET SUPPORT UTILITY SWITCH 13 260 2900 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 14 870 0277 01 1 CIRCUIT BOARD ASSEMBLY FRONT PANEL 15 131 8139 00 10 CONTACT SPRING FRONT PANEL ELEC 16 200 5049 00 1 COVER OPTION KEY DOOR 0 7270 X 1 2250 X 0 310 PC ABS FR110 SILVER GRAY MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 33 Replaceable Parts List X b 0512 001 Figure 7 Exploded view Front Panel assembly MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 34 Replaceable Parts List Table 5 Replaceable parts Display Analog board and Main board Figure and Serial Serial index Tektronix no no no part no effective discont d Qty Name and description 8 DISPLAY ANALOG BOARD amp MAIN BOARD 1 850 0110 00 1 FRAME ASSEMBLY DISPLAY LCD 2 211 1272 00 40 SCREW MACHINE 6 32 x 0 250 PNH STL ZNPL T 15 TORX DRIVE D DISTRIBUTION OF THE 211 1272 00 SCREWS 6 screws attach the LCD assembly to the front chassis 15 screws attach the Main board assembly to the front chassis 6 screws attach the Analog board assembly to the front chassis 12 screws attach the rear chassis to the front chassis 4 across the top flange of the rear chassis 2 on each side flange and 4 across the bottom flange of the front cha
15. MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual FOOT EAT A OTT Tektronix 077 0512 00 S MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual This document applies to firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Tektronix 077 0512 00 S Copyright Tektronix All rights reserved Licensed software products are owned by Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and international treaty provisions Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc Contacting Tektronix Tektronix Inc 14150 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In North America call 1 800 833 9200 Worldwide visit www tektronix com to find contacts in your area Table of Contents General Safety Sumimary L5 ol dacanccdutaandeddua taldada condi needaddnsas e enr OV ebbe EANNA iv Service Safety SUMMALY vio iere
16. OTE The test point voltages are printed on the Main board From left to right in the illustration they are 1 225 V 1 2 V 2 5 V 1 5 V 5 V 12 V 1 8 V 5 VA 5 VSB and 2 5 V 3 3 V 5 V MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 27 Maintenance Continued from Primary troubleshooting procedure From the oscilloscope power up diagnostics message display Does the power up screen report any errors Oscilloscope is operating OK e Push Utility Push Utility Page and then select Self Test e Push OK Run Self Test Determine failure from Self Test Results Use table to select module to replace Failed Test Most Likely Cause CPU Main board Display Main board Acquisition Main board ROM Main board App Modules Front Panel or App Keys Front Panel Front Panel or Main board yo Main board 0512012 Figure 6 Module isolation troubleshooting procedure 28 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Maintenance Unpacking and Repacking Instructions This section contains the information needed to unpack the oscilloscope and repack it for shipment or storage Unpacking The oscilloscope and its standard accessories are carefully packed at the factory in a shipping carton If upon receipt damage to the shipping carton is evident tell the shipper Tektronix Inc is not responsible for damage
17. RONT CASE ASSEMBLY DPO4000B SERIES 2 366 0861 01 2 ASSEMBLY KNOB 925 DIAMETER SOFT TOUCH 3 366 0865 00 1 KNOB ASSEMBLY SHUTTLE AND BUSHING 4 366 0867 01 1 KNOB ASSEMBLY JOG 5 366 0859 01 6 ASSEMBLY KNOB 470 DIAMETER SOFT TOUCH 6 366 0860 01 6 ASSEMBLY KNOB 685 DIAMETER SOFT TOUCH 7 335 2366 00 1 LABEL FRONT PANEL OVERLAY FRENCH 335 2367 00 1 LABEL FRONT PANEL OVERLAY ITALIAN 335 2368 00 1 LABEL FRONT PANEL OVERLAY GERMAN 335 2369 00 1 LABEL FRONT PANEL OVERLAY SPANISH 335 2370 00 1 LABEL FRONT PANEL OVERLAY JAPANESE 335 2371 00 1 LABEL FRONT PANEL OVERLAY PORTUGUESE 335 2372 00 1 LABEL FRONT PANEL OVERLAY SIMPLIFIED CHINESE 335 2373 00 1 LABEL FRONT PANEL OVERLAY TRADITIONAL CHINESE 335 2374 00 1 LABEL FRONT PANEL OVERLAY KOREAN 335 2375 00 1 LABEL FRONT PANEL OVERLAY RUSSIAN 8 260 2898 00 1 SWITCH KEYPAD ELASTOMERIC POWER 9 407 5259 00 1 BRACKET SUPPORT POWER SWITCH 10 211 1273 00 19 SCREW MACHINE 6 32 x 0 250 PNH STL ZNPL T 15 TORX DRIVE M DISTRIBUTION OF THE 211 1273 00 SCREWS 2 screws attach the Power switch and bracket to the front case assembly 2 screws attach the Utility switch and bracket to the front case assembly 10 screws attach the Front panel assembly to the front case assembly with contact springs 15 5 screws across the bottom of the Front panel assembly attach it to the front case assembly without contact springs 11 260 2858 00 1 SWITCH KEYPAD
18. a o o E aa a E EA 23 Troubleshooting aeien en a E T E E TEE EEE E ETENE 25 Troubleshooting Procedure iss eee ero iensen err ette eu EE EEE aa dede eod Wexens 25 Unpacking and Repacking Instructions ssssssssessssesssssssee e ee emen enn 29 Replaceable Parts List o desee ee eS ERR YU ee ERE EE TAS SOR Tete E Ede tend 31 Parts Ordering Information 0 0 0 cece eee een eee eese eese eese nn 31 Using the Replaceable Parts List 0 ccc ccc c ccc ence eee ene eect emen messen 32 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual i Table of Contents List of Figures ii Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 MSO4000B and DPO4000B series block diagram unusnunsunssrsusrrrrrrrrrrrrrrrrreene 5 Removing tabs from the front protective COVEL ccc cece cence eee e eee e nee meme 23 Module locator MM e 24 Primary troubleshooting procedure cc cece eee e cece eee e ee ee eco me eme eene 26 AC power supply troubleshooting procedure csse 27 Module isolation troubleshooting procedure 00 ccc cece cece nce e eee e eee ee ee nee n 28 Exploded view Front Panel assembly 0 ccc cece nce e ee ee eee eee en eee e eene 34 Display Analog board and Main board assembly cccceeeceeeceeeeeeeeeeeenanenes 36 Figure 9 Rear chassis and connecting modules cceeceee ee
19. arts Tektronix will provide you with the most current part for your product type serial number and modification if applicable At the time of your order Tektronix will determine the part number revision level needed for your product based on the information you provide Module Servicing Modules can be serviced by selecting one of the next three options Contact your local Tektronix service center or representative for repair assistance MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 31 Replaceable Parts List Module exchange In some cases you may exchange your module for a remanufactured module These modules cost significantly less than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 833 9200 extension 2 Module repair and return You may ship your module to us for repair after which we will return it to you New modules You may purchase replacement modules in the same way as other replacement parts Using the Replaceable Parts List This section contains a list of the mechanical and or electrical components that are replaceable for the instrument Use this list to identify and order replacement parts The following table describes each column in the parts list Table 3 Parts list column descriptions Column Column Name Description 1 Figure amp Index Items in this section are referenced by figure and index numbers to
20. cilloscope prompt Set the calibrator output channels and impedance as follows a Push the CHANNEL SELECT lower bezel button b Select the channel s specified by the oscilloscope prompt c Push the LOAD lower bezel button to highlight either 1 MQ or 50 Q as specified by the oscilloscope prompt d Push the EXIT lower bezel button Push the ON button and verify that the red light turns on to indicate that the calibrator output is on On the oscilloscope push the OK Do Next Step right bezel button MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 15 Adjustment Procedure Deskew Complete these steps to set the calibrator output for deskew NOTE Ifyou are adjusting an MSO4000B Series and the oscilloscope prompts you to connect the digital channels connect the digital probe according to the instructions in Connecting the Equipment See page 9 Connecting the Equipment Set the calibrator output signal type as follows a Push the Aux front panel button b Push the Zero skew PAN side bezel button NOTE Selecting the deskew signal automatically turns all channels on Set the calibrator termination and output channels as follows a Push the CHANNEL SELECT lower bezel button b Select the channel s specified by the oscilloscope prompt c Push the LOAD lower bezel button to highlight either 1 MQ or 50 Q as specified by the oscilloscope prompt d Push the EXIT low
21. contains FLASH ROM system RAM and interfaces to USB ports and the Ethernet port MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 3 Theory of Operation Power Converter The Power Converter receives 12 V power and 5 V standby power from the main power supply and generates voltages for the analog and digital circuitry on the Main board The front panel receives the 5 V standby power and uses input from the power switch to turn the oscilloscope on and off Front Panel Board The Front Panel board contains a microprocessor that reads the front panel buttons and controls and then sends this information to the processor system on the Main board The Front Panel board also generates the probe compensation output signal and provides an interface to the application modules 4 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Ch1 Ch2 Ch3 Ch4 Input ports for Analog Board application modules Front Panel Board Flex Circuit Bezel Buttons Power Button Power LED 174 5809 00 Probe Compensation E Amp to A D and Font Panel MSO 4000B Series Tigger Signals Ch D15 D0 i AT LCD Data PWR Main Acquisition Board XGA Display LCD Backlight Line Filter Hout SEND Power Supply System Board pr E Fan Edge 5 Front 0 USB Connector J340 Line Trigger Sense Aux Out Ref In VO Board VGA Video port Ethernet
22. e e nent eee dense me eee 38 Figure 10 External parts iccccsccsscingiits eee Dot Ie Se esso ete bob hhh ehausannee E MIU D EE etas 39 Figure 11 Rear chassis showing cables and connectors sesessssssssee e 40 Figure 12 Main board showing cable and connectors eseeessssss 4 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Table of Contents List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 External inspection checklist 0 ccce cece cece cee eee nee nnn e me me eene 21 Internal inspection checklist 0 cece cece cece eee eee een meme mene 21 Parts list column descriptions 0 cece cece eee e eee ee me eme messen 32 Replaceable parts Front Panel assembly ce ccc ece cece ence ee ee eee eee 33 Replaceable parts Display Analog board and Main board eceeeeeeeee eee eee es 35 Replaceable parts Rear chassis and connecting modules ccccceeeeeeeeeneeenees 37 Replaceable parts external parts 0 ccc cece cece cece ee e mene 39 Replaceable parts cable and connectors rear chassis essen 40 Replaceable parts cable and connectors Main board 0 cccee cee ene eee tees eneeeeaees 41 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual iii General Safety Summary General Safety Summary
23. e marker to 1 6 ms 2 Set the calibrator output channels and impedance as follows a Pushthe CHANNEL SELECT lower bezel button b Select the channel s specified by the oscilloscope prompt c Push the LOAD lower bezel button to highlight either 1 MQ or 50 Q as specified by the oscilloscope prompt d Push the EXIT lower bezel button MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedure Verify that the calibrator is in direct mode by pushing the 2m lower bezel button until 1 0 is selected Set the calibrator amplitude as follows a Select the Amplitude field using the front panel tab key CM b Set the voltage specified by the oscilloscope prompt Push the ON button and verify that the red light turns on to indicate that the calibrator output is on On the oscilloscope push the OK Do Next Step right bezel button Sine Signal Complete these steps to set the calibrator output for a sine wave signal 1 2 Push the Sine as front panel button Verify that the calibrator is in direct mode by pushing the oH lower bezel button until 1 0 is selected Set the calibrator amplitude as follows a Select the Amplitude field using the front panel tab key en b Set the voltage specified by the oscilloscope prompt Set the calibrator frequency as follows a Select the Frequency field using the front panel tab key b Set the frequency specified by the os
24. el display surface by gently rubbing the display with a clean room wipe such as Wypall Medium Duty Wipes 05701 available from Kimberly Clark Corporation If the display is very dirty moisten the wipe with distilled water or a 7596 isopropyl alcohol solution and gently rub the display surface Avoid using excess force or you may damage the plastic display surface N CAUTION To prevent getting moisture inside the oscilloscope during external 20 cleaning use only enough liquid to dampen the cloth or applicator Clean the exterior surfaces of the chassis with a dry lint free cloth or a soft bristle brush If any dirt remains use a cloth or swab dipped in a 75 isopropyl alcohol solution Use a swab to clean narrow spaces around controls and connectors Do not use abrasive compounds on any part of the chassis that might damage the chassis MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Exterior Inspection Maintenance Clean the power switch using a dampened cleaning towel Do not spray or wet the switch directly CAUTION Avoid the use of chemical cleaning agents which might damage the plastics used in this oscilloscope Use only deionized water when cleaning the menu buttons or front panel buttons Use a 75 isopropyl alcohol solution as a cleaner and rinse with deionized water Before using any other type of cleaner consult your Tektronix Service Center or representative Inspect the
25. er bezel button Set the calibrator amplitude as follows a Select the Amplitude field using the front panel tab key A b Set the voltage specified by the oscilloscope prompt Set the calibrator frequency as follows a Select the Frequency field using the front panel tab key 2 i b Set the frequency specified by the oscilloscope prompt Push the ON button and verify that the red light turns on to indicate that the calibrator output is on On the oscilloscope push the OK Do Next Step right bezel button In some cases the deskew can take several minutes CAUTION Keep the digital probe plugged in to the oscilloscope Unplugging the probe can abort the adjustment MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Troubleshooting the Adjustment Procedure Adjustment Procedure Refer to the following table for solutions to problems that you might encounter during the calibration procedure Problem Possible solutions The instrument fails an adjustment step Are the channels hooked up properly Is the signal being sent to the correct channels Check for the green lights on the probe heads Is the signal set to the correct waveform frequency and termination if applicable to the adjustment step Is the calibrator output set to ON Is the red light illuminated If you make a correction or find that everything is correct push the Return to Previous Screen side be
26. imary troubleshooting procedure flowchart See Figure 4 WARNING Before removing the cabinet disconnect the power cord from the line voltage source Failure to do so could cause serious injury or death MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 25 Maintenance Power on the instrument Does the instrument display the power up screen No Perform the AC Power Supply troubleshooting procedure Does Perform the Module Isolation the instrument pass troubleshooting procedure all the diagnostics Figure 4 Primary troubleshooting procedure 26 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Maintenance Continued from Figure 4 3 Power off oscilloscope Disconnect AC power cord Remove instrument case Check that all cables are connected and fully seated into board connectors Connect AC power cord and turn on the oscilloscope Measure for 12 V DC 0 3 V on the test point See figure at right Warning Be careful when E 3 measuring near the AC Power ae edi SERM Supply there are line voltages present on exposed parts Test Points Are there 12 volts on the test point Replace the AC Power Supply module AC Power Supply module OK Return the oscilloscope to the nearest Tektronix Service Center for repair eat Figure 5 AC power supply troubleshooting procedure N
27. ipment that 1s required to adjust the MSO4000B Series oscilloscopes Description Minimum requirements Example DC voltage source 50 mV to 70 V 0 1 amplitude accuracy Fluke 9500B Oscilloscope Calibrator with five 9530 active heads Digital calibrator probe Tektronix part number 067 2121 00 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedure Before Adjustments NOTE The voltage references inside the oscilloscope are very stable over time and should not require routine adjustment Before performing the adjustment procedure do the following Read the Service Safety Summary and the General Safety Summary at the front of this manual Perform the Performance Verification procedures If the oscilloscope is operating within specifications you do not need to make any adjustments See the MSO4000B Series and DPO4000B Series Oscilloscopes Specifications and Performance Verification Technical Reference manual which was provided with your product This manual is also available at www tektronix com manuals Before performing the adjustment procedure you must warm up the oscilloscope and the oscilloscope calibrator for at least 30 minutes in an ambient temperature between 20 C and 30 C Adjustments performed before warm up or outside this temperature range may result in poor performance or failure of the adjustment procedure Learn how to operate the oscill
28. justment Procedure Time Mark For voltages gt 5 5 V into 50 Q Complete these steps to set the calibrator output for a DC Voltage signal gt 5 5 V into 50 Q for example to select 6 V or 6 V in 50 O mode 1 Push the AUX front panel button 2 Push the HLA side bezel button for positive polarity or push the HA side bezel button for negative polarity 3 Set the amplitude 4 Set the Pulse Energy setting to 7 2 Joules the Duration should show 10s 5 When all of the parameters are set push the ON button and verify that the calibrator output is on Then push the Trig Pulse side bezel button on the calibrator to trigger a single shot of the specified pulse output As soon as the calibrator settles about one second IMMEDIATELY push the OK Do Next Step side bezel button on the oscilloscope NOTE The calibrator signal will remain at this voltage for only a few seconds so the adjustment step must be done immediately after setting the calibrator amplitude 7 lfthe instrument fails one of these steps go back and start from the first 6 V 6 V on channel 1 again Complete these steps to set the calibrator output for a Time Mark signal 1 Select the calibrator output signal type as follows LLL a Push the Markers front panel button b Push the WAVEFORM lower bezel button c Push the EUL side bezel button NOTE Ifa 625 Hz signal is required set the tim
29. l the process at any time by pushing the MENU OFF button 6 Set the calibrator output signal as follows NOTE Incorrect use of calibration equipment can allow the oscilloscope to successfully complete the Calibration Procedure and yet fail the Performance Verification a View the prompt on the oscilloscope screen to determine the required signal type amplitude and frequency as well as the required channel s Use the information provided on the following pages to set the calibrator for the required output signal DC Voltage Time Mark See page 14 Deskew See page 16 Sine See page 15 On the oscilloscope push the OK Do Next Step right bezel button The oscilloscope makes the adjustment using the calibrator signal as a reference You do not need to make any adjustments NOTE During the adjustment procedure the oscilloscope makes the required settings to oscilloscope parameters but does not display them on the screen MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 11 Adjustment Procedure 7 Continue with the adjustment process as follows NOTE During some steps the instrument may appear to be idle for several minutes while it is processing information internally a If you make an error such as connecting the wrong input signal push the Return to Previous Screen side bezel button and repeat the previous step Push the button multiple times if
30. mponent assembly or part is referred to by the term module This manual refers to any field replaceable assembly or mechanical part specifically by its name or generically as a replaceable part In general a replaceable part is any circuit board or assembly such as the hard disk drive or a mechanical part such as the I O port connectors that is listed in the replaceable parts list Symbols and terms related to safety appear in the General Safety Summary Information for service procedures appears in both the General Safety Summary and the Service Safety Summary MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual vii Preface viii MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Where to Find Operating Information For information on installing and operating your DPO4000B or your MSO4000B Series Digital Phosphor Oscilloscope refer to the Tektronix MSO4000B Series and DPO4000B Series Digital Phosphor Oscilloscopes User Manual which was provided with your oscilloscope This manual is also available in 11 languages at www tektronix com manuals MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 1 Where to Find Operating Information 2 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Theory of Operation Power Supply I O Board This chapter describes the electrical operation of the oscilloscope to the module level The bl
31. must remain accessible to the user at all times Do not operate without covers Do not operate this product with covers or panels removed Do not operate with suspected failures If you suspect that there is damage to this product have it inspected by qualified service personnel Avoid exposed circuitry Do not touch exposed connections and components when power is present Do not operate in wet damp conditions Do not operate in an explosive atmosphere Keep product surfaces clean and dry Provide proper ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Terms in This Manual Symbols and Terms on the Product MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual General Safety Summary These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property These terms may appear on the product m DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product The follo
32. nd components are dry before applying power to the oscilloscope Table 2 Internal inspection checklist Item Inspect for Repair action Circuit boards Loose broken or corroded solder Remove and replace damaged circuit board connections Burned circuit boards Burned broken or cracked circuit run plating MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 21 Maintenance Table 2 Internal inspection checklist cont Item Inspect for Repair action Resistors Burned cracked broken blistered condition Remove and replace damaged circuit board Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Corroded solder Remove and replace damaged circuit board on leads or terminals Wiring and cables Loose plugs or connectors Burned broken or frayed wiring Firmly seat connectors Repair or replace modules with defective wires or cables Chassis Dents deformations and damaged hardware Straighten repair or replace defective hardware Interior Cleaning Lubrication 22 1 Blow off dust with dry low pressure deionized air approximately 9 psi 2 Remove any remaining dust with a lint free cloth dampened in isopropyl alcohol 75 solution and rinsed with warm deionized water A cotton tipped applicator is useful for cleaning in narrow spaces and on circuit boards
33. ock diagram shows the oscilloscope module interconnections See Figure 1 on page 5 The Power Supply board converts AC line voltage to 12 V to power for all internal circuits The I O board contains USB ports an Ethernet port LAN a VGA Video port an AUX OUT BNC connector and an EXT REF IN BNC connector Main Board and Analog Board Acquisition System Trigger System Display System Processor System The Main and Analog boards contain the following functions The Acquisition system begins with the analog signal path and ends with a digitized signal in memory The signal enters a channel input and then passes through an attenuator and preamplifier The analog signal from each preamplifier goes through a digitizer a time base controller and then into acquisition memory The analog signal from each preamplifier is also distributed to a trigger circuit The Trigger system processes the analog signals from the preamplifiers and sends trigger information to the time base controller Advanced trigger functions are enabled only when the appropriate application modules and supporting software are installed The Display system combines live waveform data from acquisition memory with menus and text and stores this information in display memory It then uses this data to refresh the XGA display module LCD The Processor system contains a 460EX Power PC microprocessor that controls the entire instrument The processor system also
34. oscope calibrator Refer to the user manual which can be found at http us fluke com Navigating During Adjustments Continue Once you have set the calibrator output signal that is specified on the oscilloscope screen push the OK Do Next Step side bezel button to proceed Information about setting up the calibrator output signal is provided after the Factory Adjustment Procedure See page 13 Setting the Calibrator Output Signal Go back Push the Return to Previous Screen side bezel button to go back to the previous step Push the button multiple times if you want to go back multiple steps Abort Push the Menu Off front panel button on the oscilloscope to cancel the procedure at any time This causes the oscilloscope to revert to the previous calibration constants The ast factory calibration date will not be updated 8 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedure Connecting the Equipment Connect the Oscilloscope and the Calibrator to AC Power Connect the Active Heads Connect the Digital Probe for MSO4000B Series Only MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Connect the oscilloscope and the calibrator to the same AC power circuit Using a common power strip will accomplish this NOTE Connecting the equipment to separate AC power circuits can result in offset voltages between the equipment which can invalidate this procedu
35. outside of the oscilloscope for damage wear and missing parts using the following table as a guide Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope Table 1 External inspection checklist Item Inspect for Repair action Cabinet front panel and cover Cracks scratches deformations damaged Repair or replace defective module hardware Front panel knobs Missing damaged or loose knobs Repair or replace missing or defective knobs Connectors Broken shells cracked insulation and Repair or replace defective modules Clear deformed contacts Dirt in connectors or wash out dirt Carrying handle and cabinet feet Correct operation Repair or replace defective module Accessories Missing items or parts of items bent pins Repair or replace damaged or missing broken or frayed cables and damaged items frayed cables and defective modules connectors Interior Inspection To access the inside of the oscilloscope for cleaning and inspection refer to the exploded view diagrams See page 31 Replaceable Parts List Inspect the internal portions of the oscilloscope for damage and wear using the following table as a guide Repair any defects immediately If any circuit board is repaired or replaced you must perform the Adjustments Procedure See page 7 Adjustment Procedure CAUTION To prevent damage from electrical arcing make sure that circuit boards a
36. port USB Device 2X USB Host 0512 008 Figure 1 MSO4000B and DPO4000B series block diagram MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Theory of Operation Theory of Operation 6 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedure Required Equipment This section contains the factory adjustment procedure for the DPO4000B Series and the MSO4000B Series oscilloscopes Only qualified personnel should perform adjustment procedures The following equipment or a suitable equivalent is required to complete these procedures The following table specifies the equipment that is required to adjust the DPO4000B Series oscilloscopes Description DC voltage source Minimum requirements 20 mV to 100 V into 1 MO 6 V into 50 O 0 1 amplitude accuracy Example Fluke 9500B Oscilloscope Calibrator with 9530 active heads Time Mark Generator 1 6 ms 625 Hz 0 55 symmetrical about 0 V into 50 Q Fluke 9500B Oscilloscope Calibrator with one 9530 head Sine Generator Symmetrical about 0 V from 250 mV to 25 V into 1 MO Aberrations 0 196 after 500 ns Fluke 9500B Oscilloscope Calibrator with one 9510 Output Module Edge Generator 1 kHz with 50 ps ch ch skew Adjustment tool Nonconducting shaft with diameter 0 1 in 2 5 mm Tektronix part number 003 1433 00 The following table specifies the equ
37. re Before beginning the adjustment procedure connect four active heads from channels 1 through 4 on the calibrator to channels 1 through 4 on the oscilloscope Make sure that Channel 1 on the calibrator connects to the Channel 1 input on the oscilloscope and so on When the oscilloscope prompt requires you to connect the calibrator signal to all digital channels connect the digital probe as follows 1 Plug the digital probe into the Channel 5 active head on the calibrator 2 Plug the probe notch down into the digital channel input 3 Make sure that it snaps into place Keep the probe plugged in for the remainder of the calibration procedure f X QUCCUCI ze L J ooo J 0 o 0 0 0 0 00 Oo i 1 I D Q Adjustment Procedure Factory Adjustment Procedure NOTE Changing oscilloscope settings will abort the adjustment procedure Do not turn any knobs or push any oscilloscope buttons except those used to navigate the procedure To perform the factory adjustment procedure complete these steps 1 Connect the oscilloscope and the calibrator to AC power Be sure to follow the instructions provided in Connecting the Equipment See page 9 Connecting the Equipment Failure to follow these instructions can invalidate this procedure 2 Power on the oscilloscope and the oscilloscope calibrator and allo
38. re 18 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Maintenance This section contains the information needed to do periodic and corrective maintenance on the oscilloscope as well as repackaging instructions for returning the oscilloscope to Tektronix for service Preventing ESD Before servicing this product read the General Safety Summary and the Service Safety Summary at the front of the manual and familiarize yourself with the following electrostatic discharge ESD information CAUTION Static discharge can damage any semiconductor component in this oscilloscope When performing any service that requires internal access to the oscilloscope adhere to the following precautions to avoid damaging internal modules and their components due to electrostatic discharge 1 Minimize handling of static sensitive circuit boards and components 2 Transport and store static sensitive modules in their static protected containers or on a metal rail Label any package that contains static sensitive boards 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Service static sensitive modules only at a static free work station 4 Do not place anything capable of generating or holding a static charge on the work station surface 5 Handle circuit boards by the edges when possible 6 Do not slide the circuit boards over any surface
39. ssis 1 screw attaches the ground jack to the front chassis 3 441 2608 00 1 CHASSIS ASSEMBLY FRONT 4 211 1273 00 8 SCREW PT K35 1 57 PAN HEAD STL ZNPL T 15 TORX DRIVE 5 131 6643 00 6 CONTACT ELEC GROUNDING 0 169 L X 0 250 W X 0 320 D ELECTROLESS NICKEL PLATE 6 131 6417 00 4 CONTACT ELEC GROUNDING 0 600 L X 0 250 W X 0 220 D ELECTROLESS NICKEL PLATE 7 131 7622 00 1 CONN RECEPT GROUND JACK Bot 1 MAIN BOARD ASSEMBLY Return the instrument to Tektronix for service Must be replaced with the ANALOG BOARD ASSEMBLY 9o 707 1 ANALOG BOARD ASSEMBLY Return the instrument to Tektronix for service Must be replaced with the MAIN BOARD ASSEMBLY 10 351 1134 00 1 DIGITAL PROBE GUIDE MSO models only 11 129 1693 00 1 SPACER POST MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 35 Replaceable Parts List So A i7 Sv m Ch F3 i J l l i NI um Fg bg Hon Fg s i i i SN Cox 4 es bt SSN Ye Eu Uh UNS Ys Sy ESS SQ OLR A EN S M OPK ON OA S HIS SEIN NIG eS Ex l SINE MS 6 QUIS Sub iS g Q Joi DNS Qt Q JS XQ m 3g SQ 2 jl f i RA OF SQ NS Su if wb SE 0512 002 Figure 8 Display Analog board and Main board assembly 36 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Table 6 Replaceable parts Rear chassis and connecting modules
40. te these steps to set the calibrator output for 0 V and start the adjustment step 1 2 Ground the signal by pushing the grounding Push the DC Square L2 button rh lower bezel button 3 On the oscilloscope push the OK Do Next Step right bezel button For voltages Into 1 MQ and voltages 5 5 V into 50 Q Complete these steps to set the calibrator output for all DC voltages into 1 MQ and voltages lt 5 5 V into 50 Q 1 Select the calibrator signal type as follows a b Push the DC Square L4 button Push the WAVEFORM lower bezel button and then push the DC Positive f right bezel button Set the calibrator output channels and impedance as follows a b c d Push the CHANNEL SELECT lower bezel button Select the channel s specified by the oscilloscope prompt Push the LOAD lower bezel button to highlight either 1 MQ or 50 Q as specified by the oscilloscope prompt Push the EXIT lower bezel button Set the calibrator amplitude and start the adjustment step as follows Select the Amplitude field using the front panel tab key S Set the voltage specified by the oscilloscope prompt Push the ON button and verify that the red light turns on to indicate that the calibrator output is on On the oscilloscope push the OK Do Next Step right bezel button MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 13 Ad
41. w them both to warm up for 30 minutes 3 Connect the Active Heads following the instructions provided in Connecting the Equipment See page 9 Connecting the Equipment 4 Put the oscilloscope into the service mode as follows can take up to a minute a Power off the oscilloscope b Locate the hole in the rear panel that provides access to the CAL switch C LI o 5 o o 9 o _ il Cie B 0612 010 CAL c Insert the adjustment tool into the CAL switch hole and power on the oscilloscope while holding in the switch d Continue to hold the switch until the oscilloscope shows the Power on self passed message with the oscilloscope graticule in the background 5 Start the factory adjustment routine as follows a Pushthe Default Setup button on the front panel of the oscilloscope b Push the Utility button on the front panel of the oscilloscope c Push the Utility Page lower bezel button 10 MSOA000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual h Adjustment Procedure In the utility page menu select Calibration by turning the Multipurpose a knob Push the Factory lower bezel button Note the important information that is displayed in the factory dialog box Push the OK Do Factory Calibration side bezel button to start the adjustment process You can cance
42. wing symbol s may appear on the product A b CAUTION Protective Ground Refer to Manual Earth Terminal Chassis Ground Standby Service Safety Summary Service Safety Summary vi Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service procedures Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing components To avoid electric shock do not touch exposed connections MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual Preface Manual Conventions Modules Replaceable Parts Safety This service manual provides information that you need to troubleshoot disassemble and replace parts on the following Tektronix oscilloscopes MSO4104B MS04054B MS04034B DPO4104B DPO4054B DPO4034B This manual uses certain conventions that you should become familiar with before performing service Throughout this manual any replaceable co
43. zel button on the oscilloscope to try the adjustment step again can t set the amplitude to 0 V as specified in the prompt Ground the signal by pushing the lower bezel button can t find the parameters that need to set can t set the voltage to 625 Hz Is the waveform set correctly Is the grounding button on When this is active you will not be able to make a channel selection so in some cases you might need to temporarily deselect the grounding option while you make a channel selection If you cannot find the termination settings click the CHANNEL SELECT lower bezel button Set the time marker to 1 6 ms This will automatically set the voltage to 625 Hz can t set the signal to all channels Select Multi channel and then turn on each channel one by one I m having trouble with adjustment steps that require 6 V or 6 V Follow the instructions for voltages 25 5 V that appear in the DC Voltage setups Check the icon in the upper left corner of the calibrator screen to be sure that the polarity is correct If the instrument fails an adjustment step go back to the first 6 V step 6 V on Channel 1 and start the sequence again An adjustment step using the sine signal failed If the oscilloscope prompt specifies Channel 4 try setting the signal to Channel 5 instead MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 17 Adjustment Procedu
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