DPO3000 Series Digital Phosphor Oscilloscopes Service Manual
Contents
1. 5 1 Using the Replaceable Parts List 0 0 cee cee eee ee ee eee 5 2 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual i Table of Contents List of Tables List of Figures Table 4 1 External inspection check list 0000 Table 4 2 Internal inspection check list ee Figure 2 1 Oscilloscope module interconnections Figure 3 1 Rear panel cece eee cece cece eee reno Figure 3 2 Utility page menu cece eee weer e eens Figure 3 3 Calibration selection 0 cece eee eee eeee Figure 3 4 Factory information dialog Figure 4 1 Locator for internal modules eee Figure 4 2 Reconnecting the fan cable esee Figure 4 3 Fan cable dress eere Figure 4 4 Disconnecting the Main board Lee Figure 4 5 Display cable shield in place Lee Figure 4 6 Primary troubleshooting procedure Figure 4 7 AC power supply troubleshooting procedure Figure 4 8 Module isolation troubleshooting procedure Figure 5 1 Exploded view rear case and rear chassis Figure 5 2 Exploded view DPO3000 I O and main boards Figure 5 3 Exploded view DPO3000 front panel and power supply Figure 5 4 Exploded view DPO3000 front panel labels Figure 5 5 Exploded view Main board shield and attenua2. Problem Things to try The instrument fails a test Are the channels hooked up properly routed to the right channels and turned on Is the signal set to the correct waveform frequency and termination if applicable to the test Is the output set to ON the red light will be illuminated If you make a correction or find that everything appears to be correct click the Go back a step button to try the test again can t set the amplitude to 0 V Ground the signal by pushing the 77 7 lower bezel as specified in the prompt button cant find the parameters that Is the waveform set correctly need to set 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 can find the termination settings click the CHANNEL SELECT lower bezel button can t set the voltage to 625 Hz Set the time marker to 1 6 Ms This will automatically set the voltage to 625 Hz can t set the signal to all If you are unable to set the signal to all channels try setting channels the signal to Channel 1 I m having trouble with tests that Follow the steps for 6 V and 6 V that appear in Step 6 of require 6 V or 6 V the DC Voltage test see page 3 7 Ensure that the polarity is correct by referring to the icon that appears in the upper left corner of the
3. DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 2 1 Theory of Operation Power Supply 1 0 Board Attenuator Board Main Board Acquisition System Trigger System Display System 2 2 The Power Supply board converts AC line voltage to 12 V and 6 V to power all internal circuits The I O board contains two USB ports one host port and one device port an Ethernet port LAN a WVGA Video port and a Trigger Out BNC connector The Attenuator board contains the analog portions of the acquisition system The Acquisition system begins with the analog signal path on the Attenuator board and ends with a digitized signal in memory on the Main board The signal enters a channel input and then passes through an attenuator and preamplifier The signal is then passed to the Main board The Main board module contains the following functions The Acquisition system begins with the analog signal path on the Attenuator board and ends with a digitized signal in memory on the Main board The analog signal from each preamplifier on the Attenuator board 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 on the Attenuator board and sends trigger information to the time base controller Advanced trigger functions are enabled only when t
4. Disconnect the front panel USB cable from J0501 on the main board Disconnect the power supply cable from J0403 on the main board peu CO GEN SEC dS GO IS MES Remove the seven T 15 screws that connect the Main board to the chassis When reinstalling torque these screws to 8 0 in Ib 9 Use a screwdriver or other bar to pry the Main board up to disconnect the connection to the Attenuator board Place the point of the screwdriver under the middle heat sink spring as shown in Figure 4 4 and use the chassis edge as the fulcrum S N ca VA T SIR a ll 4 WHI AI fe V RES 4 PEF Mh CTS M e e Figure 4 4 Disconnecting the Main board 10 Lift the Main board out of the chassis and place it on a static free surface 11 When reinstalling make sure to align the main board and attenuator board connectors as shown in Figure 5 2 and press down until the connector snaps together Then use a spudger or small screwdriver to make sure that J101 is firmly seated on the front panel board see Figure 5 6 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 11 Maintenance Attenuator Board Front Chassis Display Module Follow these steps to remove the attenuator board You need to have previously removed the rear case assembly rear chassis power supply I O board and main board Use a TORX T 15 screwdriver tip See Figure 5 5 on page 5 13 1 Remove the six T 15 screws that connect the main boa
5. FRONT PANEL OVERLAY JAPANESE 335 1920 00 1 LABEL FRONT PANEL OVERLAY SPANISH 335 1919 00 1 LABEL FRONT PANEL OVERLAY GERMAN 335 1918 00 1 LABEL FRONT PANEL OVERLAY ITALIAN 335 1917 00 1 LABEL FRONT PANEL OVERLAY FRENCH 2 200 5049 00 1 COVER DOOR APP KEY 5 10 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Figure 5 4 Exploded view DPO3000 front panel labels DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 11 Replaceable Parts List Replaceable Parts List DPO3000 attenuator Fig amp index number 5 5 5 12 Tektronix part number 337 4426 00 211 1275 00 211 1272 00 870 0030 00 870 0032 01 Serial no effective Serial no discont d Qty Name amp description DPO3000 attenuator 1 SHIELD MAINBOARD 7 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL ZNPL T15 8 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 1 ATTENUATOR CIRCUIT BD ASSY TESTED 8780030XX 3893928XX WIRED 4 CHANNEL MODELS 1 ATTENUATOR CIRCUIT BD ASSY TESTED 8780030XX 3893928XX WIRED 2 CHANNEL MODELS DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Figure 5 5 Exploded view Main board shield and attenuator board DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 13 Replaceable Parts List Replaceable Parts List DPO3000 front chassis and LCD
6. Replaceable Parts Safety This service manual provides information that you need to troubleshoot disassemble and replace parts on the Tektronix 4000 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 boards 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 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 Genera Safety Summary found at the beginning of this manual Related Documentation To read about Use these documents Installation and Operation DP03000 Series Digital Phosphor Oscilloscopes User Manual available in 11 languages Specifications and Performance DPO3000 Series Technical Reference PDF only Programmer Commands DPO3000 Series Programmer Manual PDF only Analysis and Connectivity Tools Getting Started with OpenChoice Solutions Manual DPO3000 Series Digital Phosphor Oscilloscopes Service Manual vii Preface Use
7. Comm module or Main board ROM Main board App Modules Front Panel or App Keys Figure 4 8 Module isolation troubleshooting procedure 4 18 DPO3000 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 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 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 Theowner s address m Name and phone number of a contact person m Type and serial number of the instrument m Reason for returning 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
8. Fig amp index number 5 6 5 14 Tektronix part number 441 2500 00 211 1273 00 850 0043 00 211 1272 00 174 5411 00 131 7622 00 Serial no effective Serial no discont d Qty Name amp description DPO3000 FRONT CHASSIS AND LCD 1 CHASSIS FRONT SAFETY CONTROLLED 8 SCREW PT K85 1 57 PAN HEAD STL ZNPL T 15 1 LCD DISPLAY ASSEMBLY 8 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 1 CABLE EXTENSION USB HOST SAFETY CONTROLLED 1 CONN RCPT GROUND JACK DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Position pin Ole Front panel case Front chassis Position pin lo ST 01 1 a P o e O n e mm eeccc e Slide out toward the front Figure 5 6 Exploded view DPO3000 front chassis and LCD assembly DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Replaceable Parts List DPO3000 front panel and front case Fig amp index number 5 7 5 16 Tektronix part number 878 0029 01 878 0028 01 211 1273 00 131 8139 00 260 2853 00 050 3700 00 050 3701 00 Serial no effective Serial no discont d Qty Name amp description CIRCUIT BOARD ASSY 4 CH FRONT PANEL TESTED 389378100 4 CHANNEL MODELS CIRCUIT BOARD ASSY 2 CH FRONT PANEL TESTED 389378000 2 CHANNEL MODELS SCREW PT K35 1 57 PAN HEAD STL ZNPL T 15 CONTACT SPRING
9. Figure 5 6 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 13 Maintenance Front Panel Module 5 Slide the USB connector and cable out toward the front of the chassis When reinstalling slide the new USB cable and housing in from the front of the chassis and push the connector in until it snaps into place Follow these steps to remove the Front Panel module You need to have previously removed the rear case assembly rear chassis power supply I O board main board attenuator board and front chassis Use a TORX T 15 screwdriver tip See Figure 5 3 on page 5 9 and Figure 5 7 on page 5 17 1 Remove all the front panel knobs 2 Remove the 14 T 15 screws 10 with ground spring contacts holding the Front Panel board to the chassis When reinstalling torque these screws to 8 0 in Ib 3 Lift the Front Panel board off of the chassis CAUTION Do not touch the keypad 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Troubleshooting This section contains information and procedures to help you isolate a defective module in the DPO3000 series oscilloscopes 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 m
10. diet bed cle gane Beale san CE pii Pot s eid vii Manual Conventions eta echa ham ewe a DR cea vii Related Documentation sesers ceansa inaianei ana aa tenes vii Operating Information ssssssssesossesoesssosssooses 1 1 Theory of Op ration eee os en x in oe e Ran an 2 1 Block Diagrams ss iaia tr e e e tma cet a tei m RC ER DURS 2 1 Power Supply iine p c eae i AN ae t Qo Cea a AC be hu PC CR RU 2 2 I O Boatd xz eren pei rt USER RECEN Ed a Ic eg RD OR EI 2 2 Attenuator Board sd uuu a ai 2 2 Main Board iaia e aa e ara 2 2 Front Panel Board ir ela ae hats hale eile aad e eas 2 3 Adjustment Procedures cece cece cece cece cece ee eeeee 3 1 Required Equipment 3 1 Overview of the Adjustment Process LL LL 3 2 Factory Adjustment Procedure 0 0 cece cee eee ee eens 3 3 Completing the Procedure 0 eee e 3 6 Maintenance xi e uen EE TES ONE g eases 4 1 Preventing ESD io 23v ra e ea a e 4 1 Inspection and Cleaning 4 1 General Cater ua e are 4 2 Interior Cleaning union coyote Yeu ete ea ae ee 4 2 Exterior Cleaning uan ee nb ad Y YER A Rn AS 4 2 Overview of Removal Procedures 0 2 00 eee eee eee eee eee 4 6 Removal Procedures cis cir e eee ARS 4 8 Troubleshooting 5 rc d a e een 4 15 Troubleshooting Procedure 4 16 Unpacking and Repacking Instructions 0 00 cee eee eee eee eee 4 19 Replaceable Parts List 1 0 0 cc cece ccc cece erre 5 1 Parts Ordering Information
11. 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 a step you can repeat the step To cancel the calibration procedure press the Menu Off front panel button on the oscilloscope This reverts the oscilloscope to the old calibration constants DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures Factory Adjustment Procedure To perform the factory adjustment procedure complete 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 Power on the oscilloscope and warm it up for 30
12. is grounded The calibrator screen will default to Channel 1 m For any non zero voltage Before you select the voltage you must first ensure that the calibrator is in direct mode Push the MM 13 v 13 lower bezel button until 1 0 is selected For6 Vor 6 V a b Push the AUX front panel button Push the Ie side bezel button for a 6 V signal or push the UA side bezel button for a 6 V signal The polarity will be indicated only by the icon that appears in the upper left corner of the calibrator screen Set the amplitude to either 6 V or 6 V Set the Pulse Energy setting to 7 2 Joules the time should show 105 When all of the parameters are set and you ensure that the output is ON push the Trig Pulse side bezel and IMMEDIATELY push the OK Do Next Step side bezel button on the oscilloscope WARNING Once you push the Trig Pulse button on the calibrator you have only 9 seconds to push the OK Do Next Step button on the DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 3 7 Adjustment Procedures 3 8 Time Mark Sine Signal oscilloscope If the instrument fails one of these tests go all the way back to the first 6 V test 6 V on channel 1 and start that sequence over again 7 Ensure that the red light is illuminated to indicate that the output is on If not push the ON button as shown below OUTPUT e 8 Onthe oscillosco
13. the trim cabinet and internal modules Removal Il 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 Rear case assembly Rear chassis I O board assembly Power supply assembly Front chassis assembly Front case assembly AWW 7 fh assembly Front cover HO frttrTIS ii LLL Mi 77 Main board Attenuator board assembly Figure 4 1 Locator for internal modules DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Removal Procedures These procedures require that you have access to the module that you are removing Refer to the exploded drawings Figures 5 1 through 5 7 on pages 5 5 through 5 17 and to Figure 4 1 on page 4 7 to determine which trim and or modules to remove CAUTION When removing or installing 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 CAUTION To avoid damage to the Front Panel Standby On switch assembly do 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 assembly Use a
14. these documents DPO3000 Series Application Modules Installation Instructions Manual To read about Installing and testing applica tions modules Fluke Oscilloscope Calibrator Manual at http us fluke com Oscilloscope calibrator viii DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Vv e ada 0 o_o_ o y mvv e Operating Information For information on installing and operating your DPO3000 Series Digital Phosphor Oscilloscope refer to the Tektronix 3000 Series Digital Phosphor Oscilloscopes User Manual This manual is available in 11 languages on the Web at www tektronix com DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 1 1 Operating Information 1 2 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual eae Theory of Operation This chapter describes the electrical operation of the oscilloscope to the module level Figure 2 1 shows the oscilloscope module interconnections Block Diagrams Display LCD WVGA Trigger backlight display video out port Power supply J304 J302 J103 412 V in J105 J103 I O board Front panel J101 Main board Input ports for J308 application modules J306 J305 Device Bezel ks buttons port Host J1701 rear Ethernet USB port port Attenuator board front Ch 1 Ch2 Ch3 Ch4 X Auxin 4 channel oscilloscopes Chi Ch2 Aux in 2 channel oscilloscopes Figure 2 1 Oscilloscope module interconnections
15. 00 870 0236 00 870 0235 00 870 0234 00 870 0019 00 870 0016 00 211 1275 01 Serial no effective Serial no discont d Qty Name amp description DPO3000 Front Panel and Display 4 Channel 1 FAN 120MM TUBEAXIAL 12 VDC SAFETY CONTROLLED 1 CIRCUIT BOARD ASSY 2 amp 4 CH I O MAIN 389378600 TESTED DPO3000 1 CIRCUIT BOARD ASSY 4 CH ACQUISITION BD 379377900 TESTED DPO3054 1 CIRCUIT BOARD ASSY 2 CH ACQUISITION BD 379377900 TESTED DPO3052 1 CIRCUIT BOARD ASSY 4 CH ACQUISITION BD 379377900 TESTED DPO3034 1 CIRCUIT BOARD ASSY 2 CH ACQUISITION BD 379377900 TESTED DPO3032 1 CIRCUIT BOARD ASSY 4 CH ACQUISITION BD 389377900 TESTED DPO3014 1 CIRCUIT BOARD ASSY 2 CH ACQUISITION BD 379377900 TESTED DPO3012 8 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL ZNPL T15 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List J6000 J6500 J0401 J6600 Align the main board to the atenuator board connector J0400 J0501 Atenuator board connector Figure 5 2 Exploded view DPO3000 I O and main boards DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 7 Replaceable Parts List Replaceable Parts List DPO3000 front panel and power supply Fig amp index number 5 3 1 2 3 4 5 8 Tektronix part number 119 7281 00 211 1275 01 211 1273 00 366 0865 00 358 0883 00 366 0867 01 366 0861 01 366 0859 01 366 0859 01 366 08
16. 5 mm 003 1433 00 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 3 1 Adjustment Procedures Overview of the Adjustment Process Before performing adjustment procedures you must warm up the oscilloscope 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 calibration failure 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 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 If you have difficulty completing the steps refer to the Completing the Procedure section for specific instructions and troubleshooting information To complete the calibration procedure you must know how to operate the oscilloscope calibrator Please refer to the user manual which can be found at http us fluke com 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 or fails The screen does not
17. 60 01 366 0860 01 Serial no effective Serial no discont d Qty Name amp description oe c _ a o N DPO3000 Front Panel and power supply POWER SUPPLY CUSTOM MALIBU AC DC 85 275 VAC 45 440HZ IN 6VDC 6A 12V 4A OUT PLUS SOFT SWITCH amp LINE TRIGGER OUTPUT SAFETY CONTROLLED SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL ZNPL T15 SCREW PT K35 1 57 PAN HEAD STL ZNPL T 15 KNOB JOG BUSHING JOG SHUTTLE KNOB KNOB SHUTTLE KNOB 925 DIA SOFT TOUCH KNOB 470 DIA SOFT TOUCH 4 CHANNEL MODELS KNOB 470 DIA SOFT TOUCH 2 CHANNEL MODELS KNOB 685 DIA SOFT TOUCH 4 CHANNEL MODELS KNOB 685 DIA SOFT TOUCH 2 CHANNEL MODELS DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Disconnected nd o Figure 5 3 Exploded view DPO3000 front panel and power supply DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 9 Replaceable Parts List Replaceable Parts List DPO3000 front panel labels Fig amp index Tektronix part Serialno Serial no number number effective discontd Qty Name amp description 5 4 DPO3000 Front Panel labels 1 335 1926 00 1 LABEL FRONT PANEL OVERLAY RUSSIAN 335 1925 00 1 LABEL FRONT PANEL OVERLAY KOREAN 335 1924 00 1 LABEL FRONT PANEL OVERLAY STD CHINESE 335 1923 00 1 LABEL FRONT PANEL OVERLAY SIM CHINESE 335 1922 00 1 LABEL FRONT PANEL OVERLAY PORTUGUESE 335 1921 00 1 LABEL
18. FRONT PANEL ELEC SWITCH KEYPAD ELASTOMERIC FRONT PANEL 4 CHANNEL PARTS REPL KIT 2 CH FRONT PANEL ASSY DP03012 3032 3052 PARTS REPL KIT 4CH FRONT PANEL ASSY DP03014 3034 3054 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Figure 5 7 Exploded view DPO3000 front panel board and front case DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 17 Replaceable Parts List Replaceable Parts List DPO3000 Accessories Fig amp index Tektronix part Serial no number number effective 200 5052 00 See Description 016 1967 00 020 2662 00 5 18 Serial no discont d Qty Name amp description Standard Accessories COVER FRONT PROTECTIVE CABLE ASSY POWER OPTION COUNTRY A0 NORTH AMERICA AI UNIVERSAL EURO A2 UNITED KINGDOM AZ AUSTRALIA AS SWITZERLAND A6 JAPAN A10 CHINA A11 INDIA POUCH PLASTIC POUCH MS04000 ACCESSORY PACKAGE P6516 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual P N 161 0348 00 161 0343 00 161 0344 00 161 0346 00 161 0347 00 161 0342 00 161 0341 00 161 0349 00
19. GER 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 m CAUTION indicates a hazard to property including the product The following symbols may appear on the product A aa b CAUTION Protective Ground Standb Refer to Manual Earth Terminal Chassis Ground andby iv DPO3000 Series Digital Phosphor Oscilloscopes Service Manual RIVALI EEOUu 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 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual V Service Safety Summary vi DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Preface Manual Conventions Modules
20. Service Manual Tektronix DPO3000 Series Digital Phosphor Oscilloscopes 071 2422 00 This document applies to firmware version 2 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 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 Tektronix is an authorized licensee of the CompactFlash trademark 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 n North America call 1 800 833 9200 m Worldwide visit www tektronix com to find contacts in your area SSS AEN Table of Contents General Safety Summary 0 cece cece rece eee rece iii Service Safety Summary 0 cece cece cece rece eee eees v Preface 1o
21. TORX T 15 screwdriver tip See Figure 5 1 on page 5 5 1 Place the oscilloscope face down on the work surface 2 Remove the four T 15 screws from the back of the rear case assembly When reinstalling the rear case torque these screws to 8 0 in Ib 3 Grasp the case and pull outwards to remove it Rear Chassis Follow these steps to remove the Rear Chassis assembly You will need a gt g in wrench a 3 16 in nutdriver a 5 16 in wrench and a TORX T 15 screwdriver tip See Figure 5 1 on page 5 5 1 Remove the g in nut from the Aux Out BNC When reinstalling torque this nut to 25 in Ib 2 Remove the two 3 g in jackscrews from the WVGA Video connector When reinstalling torque these to 4 0 in Ib 3 Remove the two T 15 screws attaching the power connector When reinstal ling torque these screws to 8 0 in Ib 4 Remove the 12 T 15 screws attaching the rear chassis to the front chassis When reinstalling torque these screws to 8 0 in Ib 4 8 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance 5 Lift the rear chassis from the oscilloscope and unplug the fan power cable from the I O board When reinstalling the rear chassis there are several steps to follow a Make sure the captured nuts are still in place in the black plastic bracket that holds the IEC power connector b Make sure the connectors from the I O board line up with their respec tive holes in the rear chassis c Make sure th
22. anual 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 to the Adjustment Procedures section beginning on page 3 1 for information about the adjustment Required Tools and You need the following equipment to troubleshoot the instrument Equipment Tools and Equipment Example DMM 3 5 or above DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 15 Maintenance Troubleshooting Procedure Figures 4 6 through 4 8 are troubleshooting procedure flowcharts Use them to troubleshoot an instrument failure Begin with Figure 4 6 voltage source Failure to do so could cause serious injury or death d WARNING Before removing the cabinet disconnect the power cord from the line Power on the instrument Does the instrument Perform the AC Power Supply display the power up troubleshooting procedure screen Figure 4 7 Does Perform the Module Isolation the instrument pass troubleshooting procedure _allthe Figure 4 8 diagnostics Figure 4 6 Primary troubleshooting procedure 4 16 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Continued from Figure 4 6 e Power off oscilloscope e Disconnect AC power cord e Remove instrument case e Check that all cables are co
23. cable shield to the front chassis and remove the display cable shield When reinstalling torque these nuts to 8 0 in Ib see Figure 4 5 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Display cable shield Figure 4 5 Display cable shield in place Turn the front chassis over and remove the eight T 15 screws that connect the display to the front chassis as shown in Figure 5 6 When reinstalling torque these screws to 8 0 in Ib Gently lift the display up and off of the chassis CAUTION Be careful when removing and reinstalling the Display module cables If the connectors have bent pins or are installed incorrectly the Display may be destroyed Front panel USB Use this procedure to remove the front panel USB connector You must have Connector previously removed the rear case assembly rear chassis power supply I O board main board attenuator board and front chassis Use a TORX T 15 screwdriver tip needle nose pliers and a razor knife See Figure 5 6 on page 5 15 1 Place the front chassis on the work surface with the LCD facing up 2 Remove the two T 15 screws that connect the USB lower bracket to the chassis and remove the bracket and its attached EMI clip 3 Use a pair of needle nose pliers to remove the upper EMI clip from the front chassis 4 Turn the front chassis over and use the razor knife to trim off the plastic ears on both sides of the USB connector as shown in
24. calibrator screen If the instrument fails a test go all the way back to the first 6 V test 6 V on Channel 1 and start the sequence over again The Sine Signal test failed If the prompt specified Channel 4 try setting the signal to Channel 5 instead DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 3 9 Adjustment Procedures 3 10 DPO3000 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 if you need to return the oscilloscope to Tektronix for service Preventing ESD Before 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 w
25. d the General 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 DPO3000 Series Specifications and Performance Verification Technical Reference Successful completion of this adjustment procedure automatically updates the stored time and date of the latest successful adjustment Completion of the Performance Verification procedure does not update this date and time If no adjustment is needed there is also no need to update the time and date of the adjustment The following equipment or a suitable equivalent is required to complete these procedures The following table specifies required equipment for the DPO3000 Series oscilloscope Description Minimum requirements Example DC voltage source 50 mV to 70 V 0 195 amplitude Fluke or Wavetek 9500 accuracy Oscilloscope Calibrator with 9530 active heads Sine Generator 1kHz1 GHz Wavetek 9500 Oscilloscope A Calibrator with one 9510 Edge Generator 1 kHz with 50 ps ch ch skew Output Module 50 Q BNC cable BNC male to BNC male about Tektronix part number 10 in 25 cm long 012 0208 00 Adjustment tool Non conducting shaft with Tektronix part number diameter 0 1 in 2
26. e two guide pins on the power connector line up with their positioning holes d Thread the fan power cable through the hole in the rear chassis closest to the fan so that it goes to the outside of the rear chassis e After the rear chassis is re attached to the front chassis use a spudger or a pair of needle nose pliers to insert the fan power connector back through the hole and onto J200 on the I O board see Figure 4 2 f Push the rest of the fan power cable into the hole so that the entire cable is inside the Rear Chassis see Figure 4 2 Figure 4 2 Reconnecting the fan cable Fan Follow these steps to remove the fan assembly You need to have previously removed the rear case assembly and rear chassis Use a pair of pliers See Figure 5 2 on page 5 7 1 Use a pair of pliers to bend the tabs that hold the fan in the chassis 2 Slide the fan assembly out and away from the chassis 3 When reinstalling dress the fan power cable as shown in Figure 4 3 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 9 Maintenance I O Board Power Supply Module Figure 4 3 Fan cable dress Follow these steps to remove the I O board You need to have previously removed the rear case assembly and rear chassis See Figure 5 2 on page 5 7 1 Disconnect the power cable from J104 on the I O board 2 Rock the board slightly while pulling straight up to disconnect the board from the edge connector 3 Disconnect
27. epair or Burned broken or frayed wiring replace modules with defective wires or cables Chassis Dents deformations and dam Straighten repair or replace aged hardware defective hardware DPO3000 Series Digital Phosphor Oscilloscopes 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 there is still dust or dirt on the module the oscilloscope may be spray washed using a solution of 75 isopropyl alcohol by doing the following steps 1 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 DPO3000 Series Digital Phosph
28. exploded view is indexed by the numbers in the figure DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 3 Replaceable Parts List Replaceable Parts List DPO3000 rear case and rear chassis Fig amp index Tektronix part Serialno Serial no number number effective discontd Qty Name amp description 5 1 EXPLODED VIEW REAR CASE AND REAR CHASSIS 1 202 0462 00 1 CASE REAR ASSEMBLY 2 211 1275 00 4 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 3 441 2509 00 1 CHASSIS REAR 4 211 1272 00 12 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX 5 210 1039 00 1 WASHER LOCK 0 521 ID INT 0 025 THK 410 SS PASSIVATED 6 220 0265 00 1 NUT PLAIN HEX 0 5 28 X 0 625 HEX BRS NKL PL 7 214 3903 00 2 SCREW JACK 4 40 X 0 312 LONG 0 188 H HEX HEAD STAND OFF 4 40 INT THD X 0 312 THD EXT 4 40 STEEL SN PLATED 8 211 1276 00 2 SCREW MACHINE 6 32 X 0 375 PNH STL ZNPL T 15 TORX DR 9 348 1910 00 2 FOOT FRONT CABINET HINGED FSN PRT 10 335 1186 00 1 LABEL REAR IO SAFETY CONTROLLED 5 4 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Figure 5 1 Exploded view rear case and rear chassis DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 9 5 Replaceable Parts List Replaceable Parts List DPO3000 I O and main Fig amp index number 5 2 4 5 6 Tektronix part number 119 7365 00 870 0015 01 870 0237
29. ge the plastic display surface A CAUTION To prevent getting moisture inside the oscilloscope during external cleaning use only enough liquid to dampen the cloth or applicator DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 3 Maintenance Interior Inspection N 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 Internal inspection check list tem Inspect tor Repair action Circuit boards Loose broken or corroded Remove and replace damaged solder connections Burned circuit board circuit boards Burned broken or cracked circuit run plating Resistors Burned cracked broken blis Remove and replace damaged tered condition circuit board Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Remove and replace damaged Corroded solder on leads or circuit board terminals Wiring and cables Loose plugs or connectors Firmly seat connectors R
30. he 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 DPO3000 Series Digital Phosphor Oscilloscopes 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 the USB ports Power Converter The Power Converter receives the 12 V and 6 V 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 2 3 Theory of Operation 2 4 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ENEMIES Adjustment Procedures Required Equipment This chapter contains the factory adjustment procedure for the DPO3000 Series oscilloscopes Only qualified personnel should perform adjustment procedures Read the Service Safety Summary an
31. ing 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 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 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual iii General Safety Summary Terms in this Manual These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life damage to this product or other property CAUTION Caution statements identify conditions or practices that could result in Symbols and Terms These terms may appear on the product on the Product KW DAN
32. k 164M Page 3 8 Waveform type voltage 50 Q termination sine frequency termination signal to 3 channel NOTE The oscilloscope screen will not provide you with all of the information that you need to complete the steps successfully so it is critical that you follow the steps outlined in the Completing the Procedure section Each time a new prompt appears refer to the table above to identify the signal type and then ensure that you are following every step that is outlined for that specific signal type 14 Continue with the adjustment process until it is complete and you receive the Pass notification You can cancel the process at any time by pushing the MENU OFF button 15 Complete the performance verification tests to verify that the adjustment procedure has correctly calibrated the oscilloscope See the DPO3000 Series Specification and Performance Verification Technical Reference Incorrect use of calibration equipment can cause the oscilloscope to pass the Calibra tion Procedure but fail Performance Verification Completing the Procedure Instructions for completing the DC Voltage Time Mark Deskew and Sine Signal tests are below For each step in the calibration procedure start at the beginning of the numbered instructions for the specific test type and carefully complete each step If the oscilloscope fails a step consult the Troubleshooting section at the end of this chapter revert to the previous step and
33. lection DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures 11 Push the Factory lower bezel button The information dialog appears as shown in Figure 3 4 Auto Factory Adjustment BES 250MS s E I 10k points 0 00 vi Calibratio n Pass Pass Figure 3 4 Factory information dialog 12 Push the OK Do Factory Calibration side bezel button as shown in Figure 3 4 to start the adjustment process Prompts appear on the oscillo scope screen to indicate the signal type and the channels to which it should be connected NOTE The oscilloscope adjusts itself automatically using the calibrator signal as a reference 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 3 5 Adjustment Procedures 13 For each step refer to the next table to identify the signal type and then carefully follow the instructions for that signal type on the specified page Signal type Example prompt Parameters to set DC Voltage Apply 0 V DC 50 O ter Page 3 7 Waveform type voltage mination signal to 3 termination channel Time Mark Apply 500 mV Pk Pk 625 Page 3 8 Waveform type voltage Hz 50 Q termination frequency termination time mark signal to 3 channel Sine Signal Apply 2 0 V Pk P
34. minutes 3 Power on the oscilloscope calibrator and warm it up for 30 minutes 4 Connect the active heads from the calibrator to the oscilloscope ensuring that Channel 1 on the calibrator connects to Channel 1 on the oscilloscope and so on NOTE For the DPO3000 Series there will be either 2 or 4 channels to connect 5 Power off the oscilloscope Locate the hole in the rear panel that provides access to the CAL switch as shown in Figure 3 1 CAL Figure 3 1 Rear panel 6 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 Keep holding DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 3 3 Adjustment Procedures 3 4 the switch until the oscilloscope shows the Power on self test passed message with the oscilloscope graticule in the background This can take up to a minute 7 Push the Default Setup button on the front panel of the oscilloscope 8 Push the Utility button on the front panel of the oscilloscope 9 Push the Utility Page lower bezel button The utility page menu appears as shown in Figure 3 2 Utility Page 250M5 5 T 4 Apr 2008 10k points 0 00 V 14 33 31 7 A T Figure 3 2 Utility page menu 10 Use the Multipurpose a knob to select Calibration as shown in Figure 3 3 Auto utility Page 250MS s F 4 Apr 2008 10k points 0 00 V 14 34 02 Figure 3 3 Calibration se
35. nel 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 Exterior Inspection 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 Cabinet front panel and cover Front panel knobs Connectors Carrying handle and cabinet feet Accessories Inspect for Cracks scratches deformations damaged hardware Missing damaged or loose knobs Broken shells cracked insulation and deformed contacts Dirt in connectors Correct operation Missing items or parts of items bent pins broken or frayed cables and damaged connectors Repair action Repair or replace defective module Repair or replace missing or defective knobs Repair or replace defective modules Clear or wash out dirt Repair or replace defective module Repair or replace damaged or missing items frayed cables and 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 dama
36. ners 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 before performing any procedure that follows Clean the exterior surfaces and knobs of the instrument 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 instrument case that may damage the case DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Clean the On Standby switch using a dampened cleaning towel Do not spray or wet the switch directly N 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 pa
37. nnected and fully seated into board connectors Are all cables connected No e Reconnect loose cables e Return to top of Figure 4 6 No contact Yes Connect AC power cord CAUTION Power supply heat sink Do not allow AC Power connector is live when power cord body to touch the power suppl diste p pp y is attached Do not touch e Measure for 12 Vpc 0 6 V and 6 Vpc 0 6 V on connector pins See figure at right WARNING Be careful when measuring near the AC power supply there are line voltages present on exposed parts Are there 12 volts on the connector pins 2 No Replace the AC Power Supply module Yes AC Power Supply module OK Return the oscilloscope to the nearest Tektronix Service Center for repair Figure 4 7 AC power supply troubleshooting procedure DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 17 Maintenance Continued from Figure 4 6 From the oscilloscope power up diagnostics message display Does the power up screen report any errors Oscilloscope is operating OK e Push Utility e Push Utility page and then 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 yo
38. or Oscilloscopes Service Manual 4 5 Maintenance Overview of Removal Procedures List of Modules A Tools Required 4 6 Refer to Figure 4 1 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 as a 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 components 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 m Screwdriver with 4 inch flat blade m 6 inch nut driver m 5 16 in wrench m gin wrench m Needle nose pliers W X ACTO knife or other razor knife DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Trim Cabinet and Module Use the following procedures to remove
39. pe push the OK Do Next Step side bezel button The Time Mark test is often the second test type to appear in the prompts When you receive a time mark prompt complete the following steps 1 Push the Markers front panel button 2 Push the WAVEFORM lower bezel button and then push the am side bezel button NOTE If a 625 Hz signal is required set the time marker to 1 6 ms 3 Select the Amplitude field using the front panel scroll buttons and then change the voltage by using the large front panel knob on the calibrator 4 Ensure that the red light is illuminated to indicate that the output is on If not push the ON button 5 Onthe oscilloscope push the OK Do Next Step right bezel button When a Sine Signal prompt appears complete the following steps 1 Push the Sine Aa front panel button 1 2 To ensure that the voltage is in direct mode push the ES button and select 1 0 v Lo lower bezel DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures 3 Push the CHANNEL SELECT lower bezel button and then ensure that Channel 5 is selected 4 Ensure that the red light is illuminated to indicate that the output is on If not push the ON button 5 On the oscilloscope push the OK Do Next Step right bezel button Troubleshooting Refer to the next table for common issues encountered during the calibration procedure
40. rd shield to the chassis Note that there are two lengths the shorter ones go through the side rail When reinstalling torque these screws to 8 0 in Ib 2 Remove the main board shield and set it aside 3 Remove the nine T 15 screws that connect the attenuator board to the chassis Note that there are two lengths the shorter ones go through the side rail When reinstalling torque these screws to 8 0 in Ib 4 Remove the attenuator board and place it on a static free surface Follow these steps to remove the front chassis You need to have previously removed the rear case assembly rear chassis power supply I O board main board and attenuator board Use a TORX T 15 screwdriver tip See Figure 5 6 on page 5 15 1 Disconnect the cables connected to J101 and J103 on the front panel board 2 Remove the eight T 15 screws that connect the front chassis to the front case When reinstalling torque these screws to 8 0 in Ib 3 Lift the front chassis from the front case and place it on a static free surface with the LCD assembly facing up Follow these steps to remove the display module You need to have previously removed the rear case assembly rear chassis power supply I O board main board attenuator board and front chassis Use a TORX T 15 screwdriver tip See Figure 5 6 on page 5 15 1 Place the front chassis on a soft static free surface with the LCD assembly down 2 Remove the four 5 16 in nuts that connect the display
41. rist strap while handling these modules Service 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 1 Maintenance 4 2 General Care Flat Panel Display Cleaning N Interior Cleaning N 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 clea
42. rt 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 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 1 Replaceable Parts List 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 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 1 800 833 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 o
43. the cable from J103 on the I O board and lift the board away 4 Place the board on a static free surface Follow these steps to remove the power supply module You need to have previously removed the rear case assembly rear chassis and I O board Use a TORX T 15 screwdriver tip See Figure 5 3 on page 5 9 1 Disconnect the power cable from J104 on the I O board if still attached and from J0403 on the Main board 2 Disconnect the cable from the Power Supply module to J0401 on the Main board 3 Disconnect the power connector ground lead from the chassis 4 Remove the five T 15 screws that attach the Power Supply module to the chassis When reinstalling torque these screws to 8 0 in Ib 5 Liftthe Power Supply module including the power connector off of the chassis and place it on a static free surface DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Main Board Follow these steps to remove the main board You need to have previously removed the rear case assembly rear chassis power supply and I O board Use a TORX T 15 screwdriver tip See Figure 5 2 on page 5 7 Disconnect the Front Panel cable from J6000 on the main board Disconnect the display backlight cable from the J6500 on the main board Disconnect the front panel cable from J0400 on the main board Disconnect the power supply control cable from J0401 on the main board Disconnect the LCD display cable from the J6600 on the main board
44. ther 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 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 Y1 1 1972 5 2 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Replaceable Parts List Exploded Views Figures 5 1 through 5 7 on the following pages show the module level exploded views of the DPO3000 Series oscilloscopes Each
45. tor board eeeeeeeeeeeeeeeernne Figure 5 6 Exploded view DPO3000 front chassis and LCD asembly L00000 erre rr crererererenioreneoe Figure 5 7 Exploded view DPO3000 front panel board and front caseina ea ea 4 3 4 4 3 3 3 4 3 5 3 5 4 7 4 9 4 10 4 11 4 13 4 16 4 17 4 18 5 5 5 7 5 9 5 11 5 13 5 15 5 17 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual EEUU NENNEN 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 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 mak
46. try again If the step fails again return to the first step in the calibration procedure and try the entire procedure again If the procedure fails there could be problem with the oscilloscope Consider seeking customer support 3 6 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures DC Voltage The DC Voltage test is the first test to appear on the prompts and it usually makes up the majority of the calibration procedure tests For each DC Voltage test complete all 8 steps listed below to best ensure that the test will pass 1 2 Push the DC Square L3 button Push the WAVEFORM lower bezel button and then push the DC Positive Dorem right bezel button Push the CHANNEL SELECT lower bezel button Push the LOAD lower bezel button to highlight either 1M or 50 M Q Select the specified channels by using the side bezel buttons and then click the EXIT lower bezel button If the amplitude field is not selected use the front panel scroll buttons Type the specified voltage and then push the appropriate unit in the right bezel menu m For 0 V ground the signal by pushing the grounding da lower bez el button 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 the prompt requires all channels and the signal
47. 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 20 C to 60 C m Altitude To 15 000 m See the Tektronix 4000 Series Technical Reference for a complete listing of the environmental characteristics DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 19 Maintenance 4 20 DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ey aE Replaceable Parts List This chapter contains a list of the replaceable modules for the DPO3000 Series Oscilloscopes Use this list to identify and order replacement parts Parts Ordering Information Part Number Revision Level 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 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 pa
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