DPO4000 Series Digital Phosphor Oscilloscopes Service Manual
Contents
1. Required Tools and You need the following equipment to troubleshoot the instrument Equipment Tools and Equipment Example DMM 3 5 or greater digit DMM 4 12 DPO4000 Series Service Manual Maintenance Troubleshooting Procedure Figures 4 3 through 4 5 are troubleshooting procedure flowcharts Use them to troubleshoot an instrument failure Begin with Figure 4 3 NOTE Before performing the troubleshooting procedure remove the instrument cabinet see page 4 9 Power on the instrument Does the instrument Perform the AC Power Supply display the power up troubleshooting procedure screen Figure 4 4 j Does Perform the Module Isolation the instrument pass troubleshooting procedure _ allthe Figure 4 5 diagnostics Yes Figure 4 3 Primary troubleshooting procedure DPO4000 Series Service Manual 4 13 Maintenance Continued from Figure 4 3 e Power off oscilloscope e Disconnect AC power cord e Remove instrument case e Check that all cables are connected and fully seated into board connectors Are all cables e Reconnect loose cables connected e Return to top of Figure 4 3 Yes Connect AC power cord e Measure for 12 V DC 0 3 V on the connector pins See figure at right IWARNING Be careful when measuring near the AC power supply as there are line voltages present on exposed parts Are there 12 volts on the Replace the AC Pow2. 161 0104 06 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M 3109 1923 OPTION A1 EUROPEAN 161 0104 07 1 CA ASSY PWR 3 1 0MM SQ 240V 10A 2 5 M TK6121 21072WH518 2 OPTION A2 UNITED KINGDOM 161 0167 00 1 CA ASSY PWR 3 0 75MM SQ 250V 10A 2 5 M 0B445 161 0167 00 OPTION A5 SWITZERLAND 161 0306 00 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M TK6253 92 2637 250BKH OPTION A10 CHINA 161 0066 09 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M TK6121 2171H518 2 OPTION A11 INDIA 161 0298 00 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M 0B445 161 0298 00 OPTION A6 JAPAN 161 0066 00 1 CABLE ASSY PWER 3 18 AWG 92 L S3109 161 0066 00 STANDARD CABLE 1 POUCH PLASTIC POUCH TK2582 TK1441 BLACK CORDURA 5 14 DPO4000 Series Service Manual Index Index A acquisition system description 2 2 adjustment procedure 3 2 factory 3 3 adjustments 3 1 application modules ix C cabinet 4 7 calibration due date 3 1 calibration switch 3 3 circuit description 2 1 2 4 cleaning 4 5 cleaning and inspection exterior 4 2 4 3 flat panel display 4 2 interior 4 2 connectivity ix D description circuit theory 2 1 2 4 diagram 2 1 display module removal 4 11 display system description 2 2 documentation ix E electrostatic discharge 4 1 precautions 4 1 4 2 environmental characteristics 4 16 F factory adjustment 3 2 fans removal 4 10 flat panel display cleaning 4 2 flowcharts troubleshooting 4 13 front case removal
3. Mechanical Parts List I O board assemly Main board Figure 5 4 Exploded view power supply and I O board DPO4000 Series Service Manual 5 10 Mechanical Parts List Replaceable Parts List i Tektronix part Serialno Serial no Mfr number number effective discontd Qty Name 4 description code Mfr part number 5 4 Main Board 1 407 5019 00 1 BRACKET POWER SUPPLY COVER TK6709 407 5019 00 2 211 0722 00 19 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX 0KB01 211 0722 00 3 211 1213 00 1 SCREW METRIC 5 X 10MM FLATHEAD STL ZINC POSI 0KB01 211 1213 00 4 119 7223 00 1 FAN TUBEAXIAL 12VDC 0 09A 1 4W 19 TK6159 119 7223 00 CFM 4000RPM 31DBA 60MM X 60MM X 25MM W 7IN LEADS amp CONNECTOR TACH OUT 5 650 4939 00 1 POWER SUPPLY SUB ASSEMBLY DOMESTIC 80009 650 4939 00 6 366 0844 00 1 PUSH BUTTON POWER SAFETY CONTROLLED TK6619 366 0844 00 7 672 6131 01 1 1 0 BOARD 80009 672 6131 01 8 835 1213 00 1 MARKER DENT LABEL REAR PANEL LEFT 80009 335 1213 00 9 835 1214 00 1 MARKER DENT LABEL REAR PANEL RIGHT 80009 335 1214 00 10 337 4378 00 1 SHIELD INSULATOR ELECTRICAL 80009 337 4378 00 DPO4000 Series Service Manual 5 11 Mechanical Parts List A Display assembly to Inverter board assembly Inverter board assembly 5 12 DPO4000 Series Service Manual Mechanical Parts List Replaceable Parts List Fig amp index number 5 5 1 2 3 4
4. 4 10 front panel removal 4 11 front panel description 2 3 DPO4000 Series Service Manual 1 O board removal 4 10 inspection exterior 4 3 interior 4 4 inspection and cleaning exterior 4 2 flat panel display 4 2 interior 4 2 instrument calibration 3 1 internal modules 4 8 inverter board removal 4 10 T O board connections 2 2 K keypad 4 8 L lubrication 4 3 main board functions 2 2 main board removal 4 10 manual conventions ix manuals ix module interconnections 2 1 P packing 4 16 power converter description 2 3 power supply 2 2 power supply removal 4 9 preventive maintenance 4 1 probe compensation 2 3 procedures flat panel cleaning 4 2 inspection and cleaning 4 1 4 5 interior cleaning 4 5 processor system description 2 3 Index 1 Index R rear case removal 4 9 removal procedures 4 6 4 8 display module 4 11 fans 4 10 front case 4 10 front panel 4 11 T O board 4 10 inverter board 4 10 main board 4 10 power supply 4 9 rear case 4 9 Index 2 replaceable part definition ix T trigger system description 2 2 trim 4 7 troubleshoot 4 12 U user manual 1 1 DPO4000 Series Service Manual
5. 2 General Care Flat Panel Display Cleaning A Interior Cleaning A Exterior Cleaning Preventive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it 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 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 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 panel display surface by gently rubbing the display with a clean room wipe such as Wypall Medium Duty Wipes 05701 available from Kimberly Clark Corporation Use a dry low velocity stream of air to clean the interior of the chassis Use a soft bristle non static producing brush for cleaning around components If you must use a liquid for minor interior cleaning use a 75 isopropyl alcohol solution and rinse with deionized water WARNING To avoid injury power down the instrument and disconnect it from line voltage bef
6. DPO4000 Series Service Manual Tektronix part number 650 4937 00 119 6806 00 211 1143 00 407 5113 00 174 5015 00 671 5843 00 671 5959 00 671 5960 00 671 5961 00 211 0722 00 174 5014 00 211 1174 00 Serial no effective Serial no discont d Qty Name amp description Main Board FAN TRAY ASSEMBLY POWER SUPPLY INVERTER 1200VAC NO LOAD amp 600VAC 85KOHM LOADED OUTPUT SCREW PT K35 1 57 PAN HEAD T 15 BRACKET PCB BACKLIGHT BOARD CABLE ASSY SP INVERTER POWER FLAT FLEX CIRCUIT BD ASSY MAIN BOARD DPO4104 CIRCUIT BD ASSY 350MHZ 4 CHANNEL DPO4054 CIRCUIT BD ASSY 350MHZ 2 CHANNEL DPO4034 CKT BD ASSY 2 CHANNEL DP04032 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX DR CABLE ASSY SP DISPLAY DATA FLAT FLEX SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 Mfr code 80009 41165 0KB01 TK6433 80009 TK6547 TK6547 TK6547 TK6547 0KB01 80009 Mfr part number 650 4937 00 104PW191 211 1143 00 407 5113 00 174 5015 00 671 5843 00 671 5959 00 671 5960 00 671 5961 00 211 0722 00 174 5014 00 211 1174 00 5 13 Mechanical Parts List Replaceable Parts List Fig amp index Tektronix Serial no Serial no Mfr number partnumber effective discontd Qty Name amp description code Mfr part number STANDARD ACCESSORIES Accessories 161 0104 05 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M TK1373 161 0104 05 OPTION A3 AUSTRALIAN
7. MAIN STREET 810 SE SHERMAN 5750 NE MOORE COURT 23201 E APPLEWAY ONE SHIELDING WAY PO BOX 650 2880 SCOTT BLVD PO BOX 58062 23839 S BANNING BLVD 5720 C NE 121ST AVE STE 110 14150 SW KARL BRAUN DR PO BOX 500 7 ELKIN ST 1200 E 36TH ST PO BOX 510 10B VAN DYKE AVENUE 10156 TORINO 7431 EVERGREEN PARKWAY 4241 BUSINESS CENTER DR 2900 NW 229TH AVE 646 CARRIBEAN DR 289 ZING YANG ZHONG RD 1177 GIBRALTAR DRIVE SOLECTRON BUILDING 9 3965 SCHAEFER AVENUE 318 NORTH ROUND THE CITY ROAD 798 YING LUN RO AD WALGAOQIAO FTZ The table titled Manufacturers Cross Index shows codes names and addresses of manufacturers or vendors of components listed in the parts list City state zip code TINLEY PARK IL 60477 3048 CHICAGO IL 60646 WESTFIELD PA 16950 PORTLAND OR 97214 4657 HILLSBORO OR 97124 6474 LIBERTY LAKE WA 99019 DELAWARE WATER GAP PA 18327 0650 SANTA CLARA CA 95052 2554 CARSON CA 90745 VANCOUVER WA 98682 BEAVERTON OR 97077 0001 SOUTH BOSTON MA 02127 1615 CHATTANOOGA TN 37401 0510 NEW BRUNSWICK NJ 08901 VAICENTALLO 62 456 ITALY HILLSBORO OR 97124 FREMONT CA 94538 HILLSBORO OR 97124 SUNNYVALE CA 94089 1108 TECHNICAL DEVELOPMENT ZONE JIANGSU CHINA CN MILPITAS CA 95035 CHINO CA 91710 SHANGHAI COMPREHENSIVE INDUSTRIAL DEVELOPMENT ZONE FENGXIAN SHANGHAI CN PUDONG SHANGHAI CN CN 200131 5 3 Mechanical Parts List Figures 5 1 through 5 5 on the following pages show t
8. 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 DPO4000 Series Service Manual v Service Safety Summary vi DPO4000 Series Service Manual A AA Environmental Considerations Product End of Life Handling Restriction of Hazardous Substances This section provides information about the environmental impact of the product Observe the following guidelines when recycling an instrument or component Equipment Recycling Production of this equipment required the extraction and use of natural resources The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product s end of life In order to avoid release of such substances into the environment and to reduce the use of natural resources we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately The symbol shown to the left indicates that this product complies with the European Union s requirements according to Directive 2002 96 EC on waste electrical and electroni
9. 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 7 Mir Code This indicates the code of the actual manufacturer of the part 8 Mfr Part Number This indicates the actual manufacturer s or vendor s part number Abbreviations Abbreviations conform to American National Standard ANSI Y1 1 1972 5 2 DPO4000 Series Service Manual Mechanical Parts List Mfr Code to Manufacturer Cross Index Manufacturers cross index Mfr code 06383 06915 0B445 0KB01 0KB05 1WNW6 30817 4T165 57003 7X318 80009 80640 83285 3109 TK1373 TK2548 TK6121 TK6159 TK6253 TK6433 TK6547 TK6612 TK6619 TK6709 Manufacturer PANDUIT CORP RICHCO ELECTRI CORD MFG CO INC STAUFFER SUPPLY CO NORTH STAR NAMEPLATE INC ACCRA FAB INC LAIRD TECHNOLOGIES WORLD HEADQUARTERS NEC ELECTRONICS INC CHOMERICS INC KASO PLASTICS INC TEKTRONIX INC ARTESYN TECHNOLOGY POWER CONVERSION STEWARD INC FELLER U S CORPORATION PATELEC CEM XEROX CORPORATION TUMBLER CORP RAD TECHNOLOGIES VOLEX INC I SHENG ELECTRIC WIRE 4 PLASTIC KUNSHAN CO LTD SOLECTRON MILPITAS INC HANACO MANUFACTURING COMPANY ACE MOLD SHANGHAI COMPANY LTD SOLECTRON SHANGHAI DPO4000 Series Service Manual Address 17303 RIDGELAND AVE 5825 N TRIPP AVE P O BOX 804238 312 EAST
10. or service the product b to repair damage resulting from improper use or connection to incompatible equipment c to repair any damage or malfunction caused by the use of non Tektronix supplies or d to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES CA 172 Table of Contents General Safety Summary oooooooococococorocrrrrrmmm iii Service Safety Summary ccocecececrcerececreccraa v Environmental Considerations Qeccoecceeercveeer vii Prelace sii sa ida caido ii ix Manual Conventions 0 0 E EDIT a dU D T E E AEEA ix Related Documentation occ ce eee ee eens ix Operating Information occccceccecrcereccrecrer 1 1 Theory of Operation cccc
11. 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 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 The inputs are not rated for connection to mains or Category II III or IV circuits 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 Do Not Operate Without Covers Do not operate this product with covers or panels removed Do Not Operate With Suspected Failures If you suspect 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 Ventilati
12. 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 DPO4000 Series Service Manual Theory of Operation Processor System The processor system contains a 440EP Power PC microprocessor that controls the entire instrument The processor system also contains FLASH ROM system RAM and interfaces to USB ports and a Compact flash slot Power Converter The power converter receives 12V from the main power supply and generates voltages for the analog and digital circuitry on the main board 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 DPO4000 Series Service Manual 2 3 Theory of Operation 2 4 DPO4000 Series Service Manual AAA AAA Adjustment Procedures AS AA Adjustment Procedures Required Equipment This chapter contains the factory adjustment procedures for the DPO4000 series oscilloscopes Only qualified personnel should perform adjustment procedures Read the Service Safety Summary and the Gen
13. EL DPO4104 80009 335 1191 00 335 1193 00 1 LABEL FRONT PANEL MODEL DPO4034 80009 335 1193 00 3 366 0860 01 5 KNOB 685 DIA SOFT TOUCH 80009 366 0860 01 4 366 0859 01 6 KNOB 470 DIA SOFT TOUCH 80009 366 0859 01 5 366 0861 01 2 KNOB 925 DIA SOFT TOUCH 80009 366 0861 01 6 366 0865 00 1 KNOB JOG 80009 366 0865 00 7 358 0883 00 1 BUSHING JOG SHUTTLE KNOB TK2565 358 0883 00 8 366 0867 00 1 KNOB SHUTTLE 80009 366 0867 00 9 335 1467 00 1 LABEL FRONT PANEL OVERLAY RUSSIAN 80009 335 1467 00 335 1466 00 1 LABEL FRONT PANEL OVERLAY KOREAN 80009 335 1466 00 335 1465 00 1 LABEL FRONT PANEL OVERLAY STD CHINESE 80009 335 1465 00 335 1464 00 1 LABEL FRONT PANEL OVERLAY SIM CHINESE 80009 335 1464 00 335 1463 00 1 LABEL FRONT PANEL OVERLAY PORTUGUESE 80009 335 1463 00 335 1462 00 1 LABEL FRONT PANEL OVERLAY JAPANESE 80009 335 1462 00 335 1461 00 1 LABEL FRONT PANEL OVERLAY SPANISH 80009 335 1461 00 335 1460 00 1 LABEL FRONT PANEL OVERLAY GERMAN 80009 335 1460 00 335 1459 00 1 LABEL FRONT PANEL OVERLAY ITALIAN 80009 335 1459 00 335 1458 00 1 LABEL FRONT PANEL OVERLAY FRENCH 80009 335 1458 00 10 335 1183 00 1 LABEL FRONT PANEL 4CH 80009 335 1183 00 11 200 4418 00 1 COVER OPTION KEY DOOR 0 7270 X 1 2250 X 0 310 PC 7X318 200 4418 00 ABS FR110 SILVER GRAY 12 260 2798 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 80009 260 2798 00 13 211 1174 00 9 SCREW MACHINE W HEAVY PATCH THREADLOCKING OKBO1 211 1174 00 MATER
14. IAL 6 32 X 0 312 L PNH STL CAD PLT T15 14 672 6132 01 1 FRONT PANEL BOARD 4 CH 80009 672 6132 00 15 335 1194 00 1 MARKER FRONT PANEL I O 80009 335 1194 00 16 348 1860 00 2 GASKET ELEC CONDUCTIVE URETHANE FOAM 57003 DON 17 441 2378 00 1 CHASSIS FRONT SAFETY CONTROLLED TK6709 441 2378 00 18 650 4715 00 1 ASSEMBLY LCD DISPLAY 80009 650 4715 00 19 174 5014 00 1 CABLE ASSY SP DISPLAY DATA FLAT FLEX 80009 174 5014 00 20 211 1174 00 4 SCREW MACHINE W HEAVY PATCH THREADLOCKING 0KB01 211 1174 00 MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 DPO4000 Series Service Manual 5 7 Mechanical Parts List Figure 5 3 Exploded view front panel 2 channel instruments DPO4000 Series Service Manual 5 8 Mechanical Parts List Replaceable Parts List Fig amp index number 5 3 DPO4000 Series Service Manual Tektronix part number 335 1189 00 335 1185 00 260 2812 00 672 6133 01 200 4906 00 366 0860 01 366 0859 01 Serial no effective Serial no discont d Qty Name amp description N Front Panel LABEL FRONT PANEL MODEL DPO4032 MARKER IDENT LABEL FRONT PANEL 2CH SWITCH KEYPAD ELASTOMERIC FRONT PANEL CIRCUIT BOARD FRONT PANEL 2 CHANNEL COVER BNC FILLER KNOB 685 DIA SOFT TOUCH KNOB 470 DIA SOFT TOUCH Mfr code 80009 80009 TK6612 80009 TK6433 80009 80009 Mfr part number 335 1189 00 335 1185 00 260 2812 00 672 6133 01 200 4906 00 366 0860 01 366 0859 01 5 9
15. Service Manual Tektronix DPO4000 Series Digital Phosphor Oscilloscopes 071 1844 00 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 Copyright Tektronix Inc 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 supercedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc TekLink is a trademark of Tektronix Inc Contacting Tektronix Tektronix Inc 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support m In North America call 1 800 833 9200 m Worldwide visit www tektronix com to find contacts in your area Warranty 16 Tektronix warrants that the product will be free from defects in materials and workmanship for a period of three 3 years from the date of original purchase from an authorized Tektronix distributor If the product proves defe
16. attach the power supply cover 2 Lift the power supply cover off 3 Use the P2 screwdriver tip and remove the 2 screws that attach the fan to the cover Power Supply Follow these steps to remove the power supply You need to have previously removed the rear case and power supply assembly Use a TORX T 15 screwdriver tip See Figure 5 4 on page 5 10 1 Remove the 5 screws that attach the power supply cover 2 Lift the power supply cover off 3 Remove the 4 screws that attach the power supply to the power supply bracket DPO4000 Series Service Manual 4 9 Maintenance 1 0 Board Main Fans Main Board Follow these steps to remove the I O board You need to have previously removed the rear case and power supply module Use TORX T 15 screwdriver tip See Figure 5 4 on page 5 10 1 Remove the 5 screws that hold the I O board to the chassis 2 Lift straight up to remove Follow these steps to remove the side fan assembly You need to have previously removed the rear case power supply assembly and I O board Use a TORX T 15 screwdriver tip See Figure 5 5 on page 5 12 1 Remove the 6 screws that hold the side fans to the chassis 2 Disconnect the two fan connectors from the main board 3 Slide the fan assembly out and away from the chassis Follow these steps to remove the main board You need to have previously removed the rear case power supply I O board and side fans Use a TORX T 15 screwdriver tip See F
17. c equipment WEEE For information about recycling options check the Support Service section of the Ec ee Tektronix Web site www tektronix com Mercury Notification This product uses an LCD backlight lamp that contains mercury Disposal may be regulated due to environmental considerations Please contact your local authorities or within the United States the Electronics Industries Alliance www eiae org for disposal or recycling information This product has been classified as Monitoring and Control equipment and is outside the scope of the 2002 95 EC RoHS Directive This product is known to contain lead cadmium mercury and hexavalent chromium DPO4000 Series Service Manual vii Environmental Considerations viii DPO4000 Series Service Manual Preface Manual Conventions Modules Replaceable Parts Safety This Service manual provides information to troubleshoot disassemble and replace parts on the DPO4000 Series Digital Phosphor Oscilloscopes This manual uses certain conventions that you should become familiar with before attempting service Throughout this manual any replaceable component assembly or part is referred to by the term module A module is composed of electrical and mechanical assemblies circuit cards interconnecting cables and user accessible controls This manual refers to any field replaceable assembly or mechanical part specifically by its name or generically as a replaceable part In g
18. ccessories from the shipping carton and inspect them for damage Save the shipping carton for repacking or storage 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 m Name and phone number of a contact person m Type and serial number of the instrument m Reason for returning m A complete 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 The oscilloscope should be stored in a clean dry environment The following environmental characteristics apply for both shipping and storage m Temperature range 20 C to 60 C m Altitude To 15 000 m See the DPO4000 Technical Reference for a complete listing of the environmen tal characteristics DPO4000 Series Service Manual DS AAA O Mechanical Parts List AAA AE Mechanical Parts List This chapter contains a list of the replaceable modules for the DPO4000 series oscilloscope Use this list to identify and order replacement parts Parts Ordering Information Part Number Revision Level Replacement parts are available
19. ce Manual Adjustment Procedures Factory Adjustment Procedure To perform the factory adjustment procedure do these steps 1 Connect the oscilloscope to an AC power source NOTE You must connect the oscilloscope and the test equipment to the same AC power circuit Connect the oscilloscope and test instruments to a common power strip if you are unsure of the AC power circuit distribution Connecting the oscilloscope and test instruments to separate AC power circuits can result in offset voltages between the equipment which can invalidate the adjustment procedure 2 Locate the hole in the rear panel that provides access to the CAL switch on the rear panel T O III gt V o gt 0 o as J Q CAL 3 Insert the adjustment tool into the CAL switch hole Use the tool to push and hold the CAL switch in while you power on the oscilloscope Release the switch when the oscilloscope shows the power on message with the oscilloscope graticule in the background 4 Push the Default Setup button NOTE Do not skip the recall Default Setup step You must recall the factory settings in order to correctly start the factory adjustment procedure 5 Push the MENU OFF button 6 Push the UTILITY button 7 Push the System Config lower bezel button repeated
20. cecceccerceereccrecee 2 1 Block Diagrams 3 21 46 toe bah ei ea a a ne ae en 2 1 POWER SUPPLY en ee Bulle tds ee EN did ea ate Ao 2 2 VO BOAIAT A eye nee 2 2 Main Boat dha ts Mist ea le Dash Den ate miata 2 2 Front Panel Board ra 22m ee ae a ays 2 3 Adjustment Procedures oocecececcecreccreccraa 3 1 Required Equipment sii rones saa Sad ee cee ence een eee 3 1 Overview of the Adjustment Process 0 0 c cece cece eee eee ee 3 2 Factory Adjustment Procedure 0 0 cece cece eee ee eens 3 3 Maintenance 4404020604 ce reece reece renee reese nenn 4 1 Preventing ESD aici tale en Ses at a et Taek fea ten ES ISLA A 4 1 Inspection and Cleaning 0 cece cece eee ee eens 4 1 General Careers fan ce a ed Ne a d Lare co SUS sangeet 4 2 Interior Cleaning 0 1 0 0 eee eee cee eee eee nee e eee 4 2 Exteri r Cleaning a cic an aa Ge did 4 2 Overview of Removal Procedures 2 00 cee eee eee ee eee eee 4 6 Remioval Procedures u n ur eee acne een Bae nn 4 8 Troubleshooting ee ee a Voce hg ne Holen 4 12 Troubleshooting Procedure cc ccc ccc c co 4 13 Unpacking and Repacking Instructions 0 0 eee eee eee ee eee 4 16 Mechanical Parts List 4212256226 0 ccc cece cece eee E 0 B 264002740 5 1 Parts Ordering Information 0 cee cece eee ee eens 5 1 Using the Replaceable Parts List o cece eee eee 5 2 Index iso eee 420462 a i
21. ctive during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product Batteries are excluded from this warranty Parts modules and replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance All replaced parts modules and products become the property of Tektronix In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix shipping charges prepaid and with a copy of customer proof of purchase Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair
22. eneral 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 Service Safety Summary found at the beginning of this manual Related Documentation To read about Use these documents Installation and Operation DPO4000 Series Digital Phosphor Oscilloscopes User Manual available in 11 languages Specifications and Performance DPO4000 Technical Reference PDF only Programmer Commands DPO4000 Programmer Manual PDF only Analysis and Connectivity Tools Getting Started with OpenChoice Solutions Manual Installing and testing applica DPO4000 Series Application Modules Installation Instructions tions modules Manual DPO4000 Series Service Manual ix Preface x DPO4000 Series Service Manual AS AAA Operating Information AA AS Operating Information For information on installing and operating your DPO4000 Series Digital Phosphor Oscilloscope please refer to the DPO4000 Series Digital Phosphor Oscilloscopes User Manual This manual is available on the Web at www tektronix com DPO4000 Series Service Manual 1 1 Operating Information 1 2 DPO4000 Series Service Manual _ Theory of Operation d l Theory of Operation This chapter describes the electrical operation of the oscilloscope to the module level Figure 2 1 shows the osci
23. er connector Supply module pins 2 AC power supply OK Return the DPO4000 oscilloscope to the nearest Tektronix Service Center for repair Figure 4 4 AC power supply troubleshooting procedure 4 14 DPO4000 Series Service Manual Maintenance From the oscilloscope power up diagnostics message display Does the power up screen report any errors No Oscilloscope is operating OK e Push UTILITY e Push System to select Self Test e Push OK Run Self Test e Determine failure from Self Test Results e Use table to select module to replace Failed Test Most Likely Cause Acquisition Main board CPU Main board Display Main board Front Panel Front Panel or Main board 1 0 Comm module or Main board ROM Main board App Modules Front Panel or App Keys Figure 4 5 Module isolation troubleshooting procedure DPO4000 Series Service Manual 4 15 Maintenance Unpacking and Repacking Instructions Unpacking Repacking Storage This section contains the information needed to unpack the oscilloscope and repack it for shipment or storage 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 notify the shipper Tektronix Inc is not responsible for damage caused during shipping If you have not already done so carefully remove the oscilloscope and its a
24. eral Safety Summary before performing any service procedures NOTE The voltage references inside the oscilloscope are very stable over time and should not require routine adjustment Before performing any procedure in this chapter do the Performance Verification procedures to check whether the oscilloscope meets specifications See the DPO4000 Technical Reference Successful completion of this adjustment procedure automatically updates the instrument Calibration Due date and time Completion of the Performance Verification procedure does not update the instrument Calibration Due date and time The following equipment or a suitable equivalent is required to complete these procedures Description Minimum requirements Example DC voltage source 50 mV to 70 V 0 1 amplitude Wavetek 9500 Oscilloscope accuracy Calibrator with one 9510 Output Module Sine Generator 1 GHz Wavetek 9500 with 9530 Edge Generator 1 kHz with lt 50 ps ch ch skew output modules 50 Q BNC cable BNC male to BNC male 10 in Tektronix part number 25 cm long 012 0208 00 Adjustment tool Non conducting shaft with diame Tektronix part number ter lt 2 5 mm lt 0 1 in 003 1433 00 DPO4000 Series Service Manual 3 1 Adjustment Procedures Overview of the Adjustment Process 3 2 Before performing adjustment procedures you must warm up the oscilloscope at least ten minutes in an ambient temperature between 20 C and 30 C Adjust ments perf
25. he module level Exploded Views exploded views of the DPO4000 series oscilloscope The adjacent page is the list of components for that exploded view indexed by the numbers in the figure AS N N Figure 5 1 Exploded view case DPO4000 Series Service Manual 5 4 Mechanical Parts List Replaceable Parts List i Tektronix part Serialno Serial no Mfr number number effective discontd Qty Name amp description code Mfr part number 5 1 Case 1 200 4908 00 1 COVER FRONT PROTECTIVE TK6710 200 4908 00 2 202 0441 00 1 CASE REAR 80009 202 0441 00 3 211 1174 00 4 SCREW MACHINE W HEAVY PATCH THREADLOCKING 0KB01 211 1174 00 MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 4 335 1186 00 1 MARKER IDENT LABEL REAR PANEL 80009 335 1186 00 5 348 1798 00 2 FOOT FRONT 80009 348 1798 00 DPO4000 Series Service Manual 5 5 Mechanical Parts List Flex Circuit Figure 5 2 Exploded view front panel and display 4 channel instruments DPO4000 Series Service Manual 5 6 Mechanical Parts List Replaceable Parts List i Tektronix part Serialno Serial no Mfr number number effective discontd Qty Name 4 description code Mfr part number 5 2 Front Panel 1 202 0432 00 1 FRONT CASE ASSEMBLY 80009 202 0432 00 2 335 1187 00 1 LABEL FRONT PANEL MODEL DPO4054 80009 335 1187 00 335 1191 00 1 LABEL FRONT PANEL MOD
26. igure 5 5 on page 5 12 1 Disconnect the display cable from the main board 2 Disconnect the backlight cable from the inverter board 3 Remove 13 screws from the main board that connect it to the chassis 4 Lift the main board up to remove Inverter board Follow these steps to remove the inverter board from the main board You must have previously removed the main board Use a TORX T 15 screwdriver tip See Figure 5 5 on page 5 12 1 Disconnect the inverter board cable from the main board 2 Remove the inverter board from the plastic bracket 3 Remove the 2 screws that hold the inverter board bracket to the main board 4 Remove the inverter board bracket from the main board DPO4000 Series Service Manual Maintenance Front Case Assembly Follow these steps to remove the front case assembly You must have previously removed the Rear Case Assembly See Figure 5 2 on page 5 6 1 Pull off 14 knobs 2 large 5 medium 6 small and 1 rotary 2 Remove the front case by pulling back the board snaps and lifting the lower right corner of the front case 3 Place the oscilloscope face up on a soft surface such as an anti static mat with the bottom facing you 4 Disconnect the bezel button flex circuit by gently pulling the flex circuit out of the connector Display Follow these steps to remove the display module You need to have previously removed the rear case power supply assembly I O board and front case asse
27. illoscope may be spray washed using a solution of 75 isopropyl alcohol by doing the following steps 1 DPO4000 Series Service Manual Gain access to the parts to be cleaned by removing easily accessible shields and panels see Removal Procedures Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate Use hot 120 F to 140 F deionized water to thoroughly rinse them Dry all parts with low pressure deionized air Dry all components and assemblies in an oven or drying compartment using low temperature 125 F to 150 F circulating air 4 5 Maintenance Overview of Removal Procedures List of Modules A Tools Required Trim Cabinet and Module Removal A 4 6 Refer to Figures 4 1 and 4 2 for the location of modules that you are removing or installing If you are disassembling the instrument for cleaning refer to the Inspection and Cleaning procedure on page 4 1 for instructions The Mechanical Parts List chapter provides a list of all replaceable modules Any replaceable component assembly or part is referred to by the term module WARNING Only qualified personnel should perform service procedures Before doing 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 component
28. lloscope module interconnections Block Diagrams Display back light inverter power Aux Out LCD Display AC Line J170 P ET ioy J100 Front panel 19 Boalt i Input ports for Compact J420 J421 ae Flash Port Main board J120 J130 USB oa J510 eze buttons Ethernet Attenuator circuit connector J Ch 1 Ch2 Ch 3 Ch 4 EXT 4 channel oscilloscopes Ch 1 Ch2 EXT 2 channel oscilloscopes Figure 2 1 DPO4000 series block diagram DPO4000 Series Service Manual 2 1 Theory of Operation Power Supply 1 0 Board Main Board Acquisition System Trigger System Display System 2 2 The power supply converts AC line voltage to 12V to power all internal circuits The I O board contains USB ports Compact Flash port an Ethernet connector TekLink XGA Video and a Trigger Out port The main board module contains 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
29. ly to select Calibra tion DPO4000 Series Service Manual 3 3 Adjustment Procedures 3 4 8 Push the Factory lower bezel button 9 Push the OK Do Factory Calibration side bezel button to start the adjustment process 10 Connect signals from the DC voltage source as instructed by the oscilloscope display After you connect the correct signal push the OK Do Next Step side bezel button to continue the process NOTE The oscilloscope adjusts itself automatically using the reference signal from the DC voltage source You do not need to make any adjustments If you make an error such as connecting the wrong input signal you can repeat the last step by pushing the Return to Previous Screen side bezel button 11 Continue with the adjustment process until it is complete You can abort the process at any time by pushing the MENU OFF button 12 Do the performance verification tests to verify that the adjustment procedure has correctly calibrated the oscilloscope See the DPO4000 Technical Reference Incorrect use of calibration equipment can cause the oscilloscope to pass the adjustment procedure but fail performance verification DPO4000 Series Service Manual Y A Maintenance Maintenance This section contains the information needed to do periodic and corrective maintenance on the oscilloscope as well as repackaging instructions if you need to return the oscilloscope to Tektronix for service Preventing ESD Bef
30. mbly Use a TORX T 15 screwdriver tip See Figure 5 2 on page 5 6 1 Disconnect the display power cable from the main board and the backlight cable from the inverter board 2 Remove the 4 screws that hold the display to the front chassis 3 Gently lift the display up and off of the chassis If the connectors have bent pins or are installed incorrectly the Display may be CAUTION Be careful when removing and reinstalling the Display module cables destroyed Front Panel Follow these steps to remove the front panel module You need to have previously removed the front case assembly Use a TORX T 15 screwdriver tip See Figure 5 2 on page 5 6 1 Remove the 9 screws holding the front panel board to the chassis 2 Lift the front panel board off of the chassis DPO4000 Series Service Manual 4 11 Maintenance Troubleshooting This section contains information and procedures to help you isolate a defective module in a DPO4000 series oscilloscope WARNING Before doing this or any other procedure in this manual read the N General Safety Summary and Service Safety Summary found at the beginning of this manual Also to prevent possible injury to service personnel or damage to electrical components read Preventing ESD on page 4 1 Adjustment After Repair If you replace the main board you must adjust the instrument after repair Refer Adjustment Procedures beginning on page 3 1 for information about adjustment
31. n removing or installing the keypad make sure you do not touch the switch contacts with your fingers The oils in 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 DPO4000 Series Service Manual Maintenance CAUTION To avoid damage to the front panel Standby On switch assembly do N not set the Display module assembly on a work surface Sliding the oscilloscope over the edge of the work surface could break off the On Standby switch assembly Rear Case Follow these steps to remove the rear case Use a TORX T 15 screwdriver tip See Figure 5 1 on page 5 4 1 Remove the 4 screws from the back and sides of the rear case 2 Grasp the case and pull outwards to remove it Power Supply Module Follow these steps to remove the power supply module You need to have previously removed the rear case Use a TORX T 15 screwdriver tip See Figure 5 4 on page 5 10 1 Remove the 7 screws that secure the power supply module to the chassis 2 Disconnect the power supply fan and connectors from the I O board and the main board 3 Lift the power supply module off the chassis Power Supply Fan Follow these steps to remove the power supply fan assembly You need to have previously removed the rear case and power supply assembly Use a TORX T 15 and a P2 screwdriver tip See Figure 5 4 on page 5 10 1 Remove the 5 screws that
32. on Refer to the manual s installation instructions for details on installing the product so it has proper ventilation DPO4000 Series Service Manual iii General Safety Summary Terms in this Manual Symbols and Terms on the Product 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 DANGER indicates an injury hazard immediately accessible as you read the marking m WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product The following symbols may appear on the product O CAUTION Refer to Manual Protective Ground Earth Terminal Mains Connected arth Terminal ON Power Push button OUT Chassis Ground LL Push button IN DPO4000 Series Service Manual AAA AAA Service Safety Summary 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
33. ontact your local Tektronix service center or representative for repair assistance Module Exchange In some cases you may exchange your module for a reman ufactured 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 TEK WIDE extension 6630 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 Parts List Column Descriptions Column Column Name Description 1 Figure amp Index Number Items in this section are referenced by figure and index numbers to the exploded view illustrations that precede the list 2 Tektronix Part Number Use this part number when ordering replacement parts from Tektronix 3and4 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
34. ore performing any procedure that follows 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 may damage the chassis Clean the On Standby switch using a dampened cleaning towel Do not spray or wet the switch directly DPO4000 Series Service Manual Maintenance A Exterior Inspection 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 Lubrication There is no periodic lubrication required for this oscilloscope Inspect the outside of the oscilloscope for damage wear and missing parts using Table 4 1 as a guide Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope Table 4 1 External inspection check list Item Inspect for Repair action Cabinet front panel Cracks scratches deformations Repair or replace defective and cover damaged hardware module Front panel knobs Missing damaged or lo
35. ore servicing this product read the Safety Summary and Introduction at the front of the manual and the electrostatic discharge ESD information below oscilloscope CAUTION Static discharge can damage any semiconductor component in this 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 2 Inspection and Cleaning Minimize handling of static sensitive circuit boards and components Transport and store static sensitive modules in their static protected containers or on a metal rail Label any package that contains static sensitive boards Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Do service of static sensitive modules only at a static free work station Do not place anything capable of generating or holding a static charge on the work station surface Handle circuit boards by the edges when possible Do not slide the circuit boards over any surface Avoid handling circuit boards in areas that have a floor or work surface covering capable of generating a static charge Inspection and cleaning are done as preventive maintenance Preventive maintenance when done regularly may prevent oscilloscope malfunction and enhance its reliability DPO4000 Series Service Manual Maintenance 4
36. ormed before warm up or outside this temperature range may result in poor performance The factory adjustment procedure consists of a series of steps as you move through these steps the oscilloscope display provides instructions that describe the specific input signal requirements for each step If the the oscilloscope passes the step it moves on to the next step If the oscilloscope fails you can repeat the step or choose to abort the procedure NOTE Do not turn any knobs or push any front panel buttons other than the Next Step or Previous Step buttons during the adjustment procedure Doing so will cause the oscilloscope to abort the adjustment procedure The oscilloscope uses the previous calibration constants if the adjustment procedure is aborted The screen does not display the actual oscilloscope settings such as channel input impedance or vertical and horizontal settings during the adjustment procedure The oscilloscope automatically sets the instrument settings but these settings may not read out correctly on the display During some steps the instrument may appear to be idle for several minutes while it is processing information internally If the oscilloscope completes all steps in the procedure successfully a Pass message is displayed and the new calibration constants take effect If the oscilloscope does not pass the procedure the oscilloscope reverts to the previous calibration settings DPO4000 Series Servi
37. ose Repair or replace missing or knobs defective knobs Connectors Broken shells cracked insulation Repair or replace defective and deformed contacts Dirt in modules Clear or wash out dirt connectors Carrying handle and Correct operation Repair or replace defective cabinet feet module Accessories Missing items or parts of items Repair or replace damaged or bent pins broken or frayed missing items frayed cables and cables and damaged connectors defective modules If the display is very dirty moisten the wipe with distilled water or a 75 isopropyl alcohol solution and gently rub the display surface Avoid using excess force or you may damage the plastic display surface CAUTION To prevent getting moisture inside the oscilloscope during external cleaning use only enough liquid to dampen the cloth or applicator DPO4000 Series Service Manual 4 3 Maintenance Interior Inspection A To access the inside of the oscilloscope for inspection and cleaning refer to the Removal Procedures in this section Inspect the internal portions of the oscilloscope for damage and wear using Table 4 2 as a guide Repair any defects immediately If any circuit board is repaired or replaced check Table 4 2 to see if it is necessary to adjust the oscilloscope CAUTION To prevent damage from electrical arcing ensure that circuit boards and components are dry before applying power to the oscilloscope Table 4 2 Inte
38. rnal inspection check list Item Circuit boards Resistors Solder connections Capacitors Wiring and cables Chassis Repair action Loose broken or corroded Remove and replace damaged solder connections Burned circuit board circuit boards Burned broken or cracked circuit run plating Burned cracked broken blis Remove and replace damaged tered condition circuit board Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Damaged or leaking cases Remove and replace damaged Corroded solder on leads or circuit board terminals Loose plugs or connectors Firmly seat connectors Repair or Burned broken or frayed wiring replace modules with defective wires or cables Dents deformations and dam Straighten repair or replace aged hardware defective hardware DPO4000 Series Service Manual Maintenance Cleaning Procedure Interior To clean the oscilloscope interior do the following steps 1 2 Blow off dust with dry low pressure deionized air approximately 9 psi 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 STOP If after doing steps 1 and 2 a module is clean upon inspection skip the following steps If steps 1 and 2 do not remove all the dust or dirt the osc
39. s read Preventing ESD on page 4 1 You will need the following tools to remove and replace all the modules in the instrument m Torque limiting screwdriver 12 in lb 1 3 N m range with TORX T 15 tips If you are using a magnetic screwdriver with interchangeable bits the T 15 bit must be a long bit at least 5 cm 2 in overall length Screwdriver with inch flat blade m Phillips screwdrivers with PO and P2 tips m 6 inch nut driver m Needle nose pliers Use the following tables to remove the trim cabinet and internal modules 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 DPO4000 Series Service Manual Maintenance E me Rear case Figure 4 1 Locator for trim and cabinet removal 4 7 DPO4000 Series Service Manual Maintenance Removal Procedures 4 8 A Power supply assembly Inverter board assembly Side fans Display assembly assembly 1 O board assembly Front Case Main board assembly O R Front Panel assembly Figure 4 2 Locator for internal modules These procedures assume you have access to the module that you are removing Refer to the exploded drawings on pages 5 4 through 5 12 and to Figures 4 1 and 4 2 on pages 4 7 and 4 8 to determine which trim and or modules to remove CAUTION Whe
40. t taa index DPO4000 Series Service Manual i Table of Contents List of Tables List of Figures Table 4 1 External inspection check list _ 5 5 0 4 3 Table 4 2 Internal inspection checKlist_ 0 4 4 Figure 2 1 DPO4000 series block diagram 2 1 Figure 4 1 Locator for trim and cabinet removal 4 7 Figure 4 2 Locator for internal modules oo oo oo oo 4 8 Figure 4 3 Primary troubleshooting procedure 4 13 Figure 4 4 AC power supply troubleshooting procedure 4 14 Figure 4 5 Module isolation troubleshooting procedure 4 15 Figure 5 1 Exploded view CAS ococecveeerceeen 5 4 Figure 5 2 Exploded view front panel and display 4 channel instruments ccc cece eee cere eee eees 5 6 Figure 5 3 Exploded view front panel 2 channel instruments 5 8 Figure 5 4 Exploded view power supply and I O board 5 10 Figure 5 5 Exploded view mainboard inverter board and side fans ia ia 2 ne aad 00050 a 5 12 DPO4000 Series Service Manual AS AE General Safety Summary To Avoid Fire or Personal Injury 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
41. 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 m Part number see Part Number Revision Level below m Instrument type or model number m Instrument serial number m 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 Tektronix part numbers contain two digits that show the revision level of the 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 parts 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 DPO4000 Series Service Manual 5 1 Mechanical Parts List Module Servicing Modules can be serviced by selecting one of the following three options C
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