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Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual

1. gg E CAL Figure 3 1 Rear panel Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures 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 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 Config Utility Page Figure 3 2 Utility page menu 10 Use the Multipurpose a knob to select Calibration as shown in Figure 3 3 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 3 5 Adjustment Procedures Utility Page B calibration Utility Page Figure 3 3 Calibration selection 11 Push the Factory lower bezel button The information dialog appears as shown in Figure 3 4 Calibration Figure 3 4 Factory information dialog 3 6 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures 12 Push the OK Do Factory Calibration side bezel button as shown in Figure 3 4 to start the adjustment process Prompts app
2. Front Case Main board assembly e Qu Front Panel assembly Figure 4 2 Locator for internal modules These procedures require that you have access to the module that you are removing Refer to the exploded drawings Figures 5 1 through 5 9 on pages 5 5 through 5 21 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 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance CAUTION To avoid damage to the Front Panel Standby On switch assembly do A 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 assembly Use a Torx T 15 screw driver tip See Figure 5 1 on page 5 5 1 Remove the screw from the back and sides of the Rear Case assembly 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 assembly Use a Torx T 15 screwdriver tip See Figure 5 6 on page 5 15 1 Remove the 3 sc
3. 1191 00 335 1193 00 3 366 0860 01 4 366 0859 01 5 366 0861 01 6 366 0865 00 7 358 0883 00 8 366 0867 01 9 335 1467 00 335 1466 00 335 1465 00 335 1464 00 335 1463 00 335 1462 00 335 1461 00 335 1460 00 335 1459 00 335 1458 00 10 335 1183 00 11 200 4418 00 12 260 2813 01 13 211 1174 00 14 872 0005 00 15 335 1194 00 16 348 1860 00 17 441 2378 00 18 650 4715 01 19 174 5014 00 20 211 1174 00 5 6 Serial no effective Serial no discont d Qty Name amp description DPO4000 Front Panel and Display 4 Channel FRONT CASE ASSEMBLY LABEL FRONT PANEL MODEL DPO4054 LABEL FRONT PANEL MODEL DPO4104 LABEL FRONT PANEL MODEL DPO4034 KNOB 685 DIA SOFT TOUCH KNOB 470 DIA SOFT TOUCH KNOB 925 DIA SOFT TOUCH KNOB JOG BUSHING JOG SHUTTLE KNOB KNOB SHUTTLE LABEL FRONT PANEL OVERLAY RUSSIAN LABEL FRONT PANEL OVERLAY KOREAN LABEL FRONT PANEL OVERLAY STD CHINESE LABEL FRONT PANEL OVERLAY SIM CHINESE LABEL FRONT PANEL OVERLAY PORTUGUESE LABEL FRONT PANEL OVERLAY JAPANESE LABEL FRONT PANEL OVERLAY SPANISH LABEL FRONT PANEL OVERLAY GERMAN LABEL FRONT PANEL OVERLAY ITALIAN LABEL FRONT PANEL OVERLAY FRENCH LABEL FRONT PANEL 4CH COVER OPTION KEY DOOR 0 7270 X 1 2250 X 0 310 PC ABS FR110 SILVER GRAY SWITCH KEYPAD ELASTOMERIC FRONT PANEL SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 FRONT PANEL BOARD 4 CH MARKER FR
4. To read about Use these documents Installation and Operation Tektronix 4000 Series Digital Phosphor Oscilloscopes User Manual available in 11 languages Specifications and Performance Tektronix 4000 Series Technical Reference PDF only Programmer Commands Tektronix 4000 Series Programmer Manual PDF only Analysis and Connectivity Tools Getting Started with OpenChoice Solutions Manual Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual ix Preface To read about Use these documents Installing and testing applica tions modules Tektronix 4000 Series Application Modules Installation Instructions Manual Oscilloscope calibrator Fluke Oscilloscope Calibrator Manual at http us fluke com x Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Di as Operating Information E Operating Information For information on installing and operating your DPO4000 or your MSO4000 Series Digital Phosphor Oscilloscope refer to the Tektronix 4000 Series Digital Phosphor Oscilloscopes User Manual This manual is available in 11 languages on the Web at www tektronix com Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 1 1 Operating Information 1 2 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual d Theory of Operation eae Theory of Operation This chapter describes the electrical operation of the oscilloscope to the module level Figure 2
5. CABLE ASSY PWR 3 1 0 MM SQ 250V 10A 2 5 ME TER STR IEC320 RCPT X 13A FUSED UK PLUG 13A FUSE SAFETY CONTROLLED OPTION A2 UNITED KINGDOM 161 0066 13 1 CABLE ASSY PWR 3 1 0 MM SQ 250V 10A 2 5 ME TER STR IEC320 RCPT SAFETY CONTROLLED INSULATED PINS OPTION A3 AUSTRALIA 161 0154 00 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 ME TER STR IEC320 RCPT SAFETY CONTROLLED OPTION A5 SWITZERLAND 161 0304 00 1 CABLE ASSY PWR 3 1 0MM SQ 250V 10A 2 5 ME TER STR IEC320 3C CERTIFICATION RCPT SAFETY CONTROLLED OPTION A10 CHINA 016 1967 00 1 POUCH PLASTIC POUCH 020 2662 00 1 MS04000 ACCESSORY PACKAGE P6516 5 22 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual
6. 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 damage 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 theoscilloscope for damage and wear using Table 4 2 as a guide Repair any defects immediately I
7. 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 3 11 Adjustment Procedures Problem Pm having trouble with tests that require 6 V or 6 V The Sine Signal test failed Things to try Follow the steps for 6 V and 6 V that appear in Step 6 of the DC Voltage test Ensure that the polarity is correct by referring to the icon that appears in the upper left corner of the 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 If the prompt specified Channel 4 try setting the signal to Channel 5 instead Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual po Maintenance Maintenance This section contains the information needed to do periodic and corrective maintenance on the oscilloscrope as well as repa
8. 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 3 2 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures 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 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 3 3 Adj
9. 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 See www tektronix com service to find a service center near you 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual DS aes Mechanical Parts List _ Eee 2a Mechanical Parts List This chapter contains a list of the replaceable modules for the DPO4000 and MSO04000 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 Pa
10. pte POR E tne de DRS Reged gua 4 12 Troubleshooting Procedure 0 0 eee eect eee nee eee 4 13 Unpacking and Repacking Instructions 0 cee eee eee eee eee 4 16 Mechanical Parts List cece cece eee cece rere ee eeee 5 1 Parts Ordering Information 0 00 c cece cece eee ee eens 5 1 Using the Replaceable Parts List 0 0 eee eee eee eee eee 5 2 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual i Table of Contents List of Tables List of Figures Table 4 1 External inspection check list esee Table 4 2 Internal inspection check list Figure 2 1 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 5 1 Figure 5 2 4 channel instruments Figure 5 3 Exploded view 4 channel instruments Figure 5 4 Exploded view 2 channel instruments Figure 5 5 Exploded view 2 channel instruments Figure 5 6 Exploded view and I O board Figure 5 7 Exploded view and I O board Oscilloscope module interconnections Rear panel Utility page menu Calibration selection ccce Factory information dialog Digital channel input Locator for trim and cabinet removal Locator for internal modules eee Primary troubleshooting procedure AC power supply troubleshooting procedure Module isolation
11. troubleshooting procedure Exploded view case eee Exploded view DPO4000 front panel and display Figure 5 8 Exploded view DPO4000 Main board Inverter board and side fans eeeeeeee Figure 5 9 Exploded view MSO4000 Main board Inverter board and side fans leere 4 3 4 4 2 1 3 4 3 5 3 6 3 6 3 10 4 7 4 8 4 13 4 14 4 15 5 5 5 7 5 9 5 11 5 13 5 15 5 17 5 19 5 21 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual a a 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 haza
12. 1 872 0004 00 200 4906 00 366 0860 01 366 0859 01 Serial no effective Serial no discont d Qty Name amp description DPO4000 Front Panel and Display 2 Channel 1 LABEL FRONT PANEL MODEL DPO4032 1 MARKER IDENT LABEL FRONT PANEL 2CH 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 1 CIRCUIT BOARD FRONT PANEL 2 CHANNEL COVER BNC FILLER KNOB 685 DIA SOFT TOUCH KNOB 470 DIA SOFT TOUCH 42 nm Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Figure 5 4 Exploded view DPO4000 front panel and display 2 channel instruments 5 11 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List MSO4000 front panel and display 2 channel Fig amp index number 5 5 5 12 Tektronix part number 335 1640 00 335 1397 00 260 2814 01 872 0004 00 200 4906 00 366 0860 01 366 0859 01 Serial no effective Serial no discont d Qty Name amp description MS0O4000 Front Panel and Display 2 Channel 1 LABEL FRONT PANEL MODEL MS04032 1 MARKER DENT LABEL FRONT PANEL 2CH 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 1 CIRCUIT BOARD FRONT PANEL 2 CHANNEL COVER BNC FILLER KNOB 685 DIA SOFT TOUCH KNOB 470 DIA SOFT TOUCH 42 nm Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Figure 5 5 Exploded view MSO4000 front panel and display
13. 1 shows the oscilloscope module interconnections Block Diagrams Display back light n Trigger inverter Display Out power AC Line J140 J170 Front Panel 100 I O Board Input ports for J440 application J420 J421 modules Main board CompactFlash Port J120 J130 Attenuator circuit Ethernet port Ch 1 Ch2 Ch3 Ch4 Auxin 4 channel oscilloscopes USB J510 Bezel buttons Ch 1 Ch2 Aux in 2 channel oscilloscopes Figure 2 1 Oscilloscope module interconnections Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 board converts AC line voltage to 12 V to power for all internal circuits The I O board contains USB ports a CompactFlash port an Ethernet port LAN an XGA Video port and a Trigger Out BNC connector 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
14. 2 channel instruments 5 13 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List DPO4000 Power Supply and I O board Fig amp index number 5 6 1 2 3 4 5 14 Tektronix part number 407 5019 01 211 1198 00 335 1655 00 119 7037 00 650 4939 02 366 0844 00 672 1785 01 335 1213 01 335 1738 00 337 4378 00 131 6643 00 Serial no effective Serial no discont d Qty Name amp description DPO4000 Power Supply and I O Board 1 BRACKET POWER SUPPLY COVER 19 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX 1 SERIAL NUMBER LABEL 1 FAN TUBEAXIAL 12VDC 0 09A 1 4W 19 CFM 4000RPM 31DBA 60MM X 60MM X 25MM W 7IN LEADS amp CONNECTOR TACH OUT 1 POWER SUPPLY SUB ASSEMBLY DOMESTIC 1 PUSH BUTTON POWER SAFETY CONTROLLED 1 1 0 BOARD 1 MARKER IDENT LABEL REAR PANEL LEFT 1 MARKER IDENT LABEL REAR PANEL RIGHT 1 SHIELD INSULATOR ELECTRICAL 1 GROUNDING CLIPS Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List I O board assemly Figure 5 6 Exploded view DPO4000 Power Supply and I O board 5 15 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List M 04000 Power Supply and I O board Fig amp index number 5 7 1 2 3 4 5 16 Tektronix part number 407 5019 01 211 1198 00 33
15. 5 1655 00 119 7223 00 650 4939 02 366 0844 00 672 1785 01 335 1213 01 335 1738 00 337 4378 00 131 6643 00 Serial no effective Serial no discont d Qty Name amp description MS04000 Power Supply and I O Board 1 BRACKET POWER SUPPLY COVER 19 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX 1 SERIAL NUMBER LABEL 1 FAN TUBEAXIAL 12VDC 0 09A 1 4W 19 CFM 4000RPM 31DBA 60MM X 60MM X 25MM W 7IN LEADS amp CONNECTOR TACH OUT 1 POWER SUPPLY SUB ASSEMBLY DOMESTIC 1 PUSH BUTTON POWER SAFETY CONTROLLED 1 1 0 BOARD 1 MARKER IDENT LABEL REAR PANEL LEFT 1 MARKER IDENT LABEL REAR PANEL RIGHT 1 SHIELD INSULATOR ELECTRICAL 1 GROUNDING CLIPS Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List I O board assemly Figure 5 7 Exploded view MSO4000 Power Supply and I O board 5 17 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List DPO4000 main board inverter board and side fans Fig amp index number 5 8 1 2 5 18 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 1198 00 174 5014 00 211 1174 00 Serial no effective Serial no discont d Qty Name amp description DPO4000 Main board Inverter Board Side Fans 1 FAN TRAY ASSEMBLY 1 POWER SUPPLY INVERT
16. 972 5 2 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Exploded Views Figures 5 1 through 5 8 on the following pages show the module level exploded views of the DPO4000 Series and the MSO4000 Series oscilloscopes Each exploded view is indexed by the numbers in the figure Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 5 3 Mechanical Parts List Replaceable Parts List DPO4000 and MSO4000 case Fig amp index number 5 1 5 4 Tektronix part number 200 4908 00 202 0441 00 211 1174 00 335 1186 00 348 1798 00 Serial no effective Serial no discont d Qty Name amp description Exploded View Case 1 COVER FRONT PROTECTIVE 1 CASE REAR ASSEMBLY 4 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 1 MARKER IDENT LABEL REAR PANEL 2 FOOT FRONT ASSEMBLY Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List AM P 7 fe e C ee JUNE S j Figure 5 1 Exploded view case 5 5 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List DPO4000 front panel and display 4 channel Fig amp index Tektronix part number number 5 2 1 202 0432 00 2 335 1187 00 335
17. AD amp 600VAC 85KOHM LOADED OUTPUT 2 SCREW PT K35 1 57 PAN HEAD T 15 1 BRACKET PCB BACKLIGHT BOARD 1 CABLE ASSY SP INVERTER POWER FLAT FLEX 1 CIRCUIT BD ASSY MAIN BOARD MSO4104 1 CIRCUIT BD ASSY 500MHZ 4 CHANNEL MSO4054 1 CIRCUIT BD ASSY 500MHZ 4 CHANNEL MS04034 1 CKT BD ASSY 2 CHANNEL MS04032 6 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX DR 1 CABLE ASSY SP DISPLAY DATA FLAT FLEX 18 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 1 PROBE GUIDE Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List assembly Display assembly to Inverter board Inverter board o Ee Main board Main board assembly Figure 5 9 Exploded view MSO4000 Main board Inverter board and side fans 5 21 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List DPO4000 and MSO4000 Accessories Fig amp index Tektronix part Serialno Serial no number number effective discontd Qty Name amp description No Image Accessories 161 0066 09 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M OPTION A1 UNIVERSAL EURO 161 0400 00 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M OPTION A11 INDIA 161 0298 00 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M OPTION A6 JAPAN 161 0066 00 1 CABLE ASSY PWER 3 18 AWG 92 L STANDARD CABLE OPTION A0 161 0066 10 1
18. B 925 DIA SOFT TOUCH KNOB JOG BUSHING JOG SHUTTLE KNOB KNOB SHUTTLE LABEL FRONT PANEL OVERLAY RUSSIAN LABEL FRONT PANEL OVERLAY KOREAN LABEL FRONT PANEL OVERLAY STD CHINESE LABEL FRONT PANEL OVERLAY SIM CHINESE LABEL FRONT PANEL OVERLAY PORTUGUESE LABEL FRONT PANEL OVERLAY JAPANESE LABEL FRONT PANEL OVERLAY SPANISH LABEL FRONT PANEL OVERLAY GERMAN LABEL FRONT PANEL OVERLAY ITALIAN LABEL FRONT PANEL OVERLAY FRENCH LABEL FRONT PANEL 4CH COVER OPTION KEY DOOR 0 7270 X 1 2250 X 0 310 PC ABS FR110 SILVER GRAY SWITCH KEYPAD ELASTOMERIC FRONT PANEL SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 FRONT PANEL BOARD 4 CH MARKER FRONT PANEL I O GASKET ELEC CONDUCTIVE URETHANE FOAM CHASSIS FRONT SAFETY CONTROLLED ASSEMBLY LCD DISPLAY 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Flex Circuit Figure 5 3 Exploded view MSO4000 front panel and display 4 channel instruments 5 9 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List DPO4000 front panel and display 2 channel Fig amp index number 5 4 5 10 Tektronix part number 335 1189 00 335 1185 00 260 2812 0
19. ER 1200VAC NO LOAD amp 600VAC 85KOHM LOADED OUTPUT 2 SCREW PT K35 1 57 PAN HEAD T 15 1 BRACKET PCB BACKLIGHT BOARD 1 CABLE ASSY SP INVERTER POWER FLAT FLEX 1 CIRCUIT BD ASSY MAIN BOARD DPO4104 1 CIRCUIT BD ASSY 350MHZ 4 CHANNEL DPO4054 1 CIRCUIT BD ASSY 350MHZ 2 CHANNEL DPO4034 1 CKT BD ASSY 2 CHANNEL DPO4032 6 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX DR 1 CABLE ASSY SP DISPLAY DATA FLAT FLEX 13 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List assembly Display assembly to Inverter board Inverter board o Ee Main board Main board assembly Figure 5 8 Exploded view DPO4000 Main board Inverter board and side fans 5 19 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List MSO4000 Main board Inverter board and side fans Fig amp index number 5 9 1 2 5 20 Tektronix part number 650 5077 00 119 6806 00 211 1143 00 407 5113 00 174 5015 00 671 5988 00 671 6144 00 671 6288 00 671 6145 00 211 1198 00 174 5014 00 211 1174 00 351 1115 00 Serial no effective Serial no discont d Qty Name amp description MS04000 Main board Inverter board side fans 1 FAN TRAY ASSEMBLY 1 POWER SUPPLY INVERTER 1200VAC NO LO
20. ONT PANEL I O GASKET ELEC CONDUCTIVE URETHANE FOAM CHASSIS FRONT SAFETY CONTROLLED ASSEMBLY LCD DISPLAY 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Flex Circuit Figure 5 2 Exploded view DPO4000 front panel and display 4 channel instruments 5 7 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Mechanical Parts List Replaceable Parts List MSO4000 front panel and display 4 channel Fig amp index Tektronix part number number 5 8 1 202 0414 00 2 335 1642 00 335 1643 00 335 1641 00 3 366 0860 01 4 366 0859 01 5 366 0861 01 6 366 0865 00 7 358 0883 00 8 366 0867 01 9 335 1653 00 335 1652 00 335 1651 00 335 1650 00 335 1649 00 335 1648 00 335 1647 00 335 1646 00 335 1645 00 335 1644 00 10 335 1395 00 11 200 4418 00 12 260 2813 01 13 211 1174 00 14 872 0005 00 15 335 1359 00 16 348 1860 00 17 441 2378 00 18 650 4715 01 19 174 5014 00 20 211 1174 00 5 8 Serial no effective Serial no discont d Qty Name amp description MSO 4000 Front Panel and Display 4 Channel FRONT CASE ASSEMBLY LABEL FRONT PANEL MODEL DPO4054 LABEL FRONT PANEL MODEL DPO4104 LABEL FRONT PANEL MODEL DPO4034 KNOB 685 DIA SOFT TOUCH KNOB 470 DIA SOFT TOUCH KNO
21. Safety Summary vi Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual HERNAN 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 electronic equipment WEEE For information about recycling options check the Support Service section of the HEN 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 disposa
22. Service Manual Tektronix Tektronix 4000 Series Digital Phosphor Oscilloscopes 071 2137 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 Se AEN Table of Contents General Safety Summary 0 cece cece reece eee ee cees iii Service Safety Summary 0 cc cece cece reece eee eeees v E
23. al 3 9 Adjustment Procedures 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 On the oscilloscope push the OK Do Next Step right bezel button Deskew MSO Only If you are using the MSO4000 Series oscilloscope and you recieve a prompt for a deskew test complete the following steps 1 Plug the probe notch down into the digital channel input as shown in Figure 3 5 Ensure that is snaps into place Keep the probe plugged in for the remainder of the calibration procedure P lt eO exem 7 CIN oL D cp ogo 29 oO o olje oo olo of 2 9 Qe i 6 wo Uo et e s e e CJ Lc Figure 3 5 Digital channel input SS 2 Push the Aux front panel button and then push the Zero skew side bezel button 3 Set the specified voltage frequency and termination 4 Push the CHANNEL SELECT button and ensure that all channels are selected including Channel 5 5 Ensure that the red light is illuminated to indicate that the output is on If not push the ON button 6 On the oscilloscope push the OK Do Next Step right bezel button In some cases this can take several minu
24. 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 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 Tektronix 4000 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 A 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 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
25. 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 side bezel button for a 6 V signal or push the c Set the amplitude to either 6 V or 6 V d Set the Pulse Energy setting to 7 2 Joules the time should show 10s e 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 WARN ING 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 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 oscilloscope push the OK Do Next Step side bezel button Time Mark 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 H front panel button 2 Push the WAVEFORM lower bezel button and then push the EL side bezel button NOTE If a 625 Hz signal is required set the time marker to 1 6 ms Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manu
26. board off of the chassis Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 4 11 Maintenance Troubleshooting A Adjustment After Repair Required Tools and Equipment This section contains information and procedures to help you isolate a defective module in the DPO4000 series or the MSO4000 series oscilloscopes WARNING Before doing this or any other procedure in this manual read the 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 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 You need the following equipment to troubleshoot the instrument Tools and Equipment Example DMM 3 5 or above Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 voltage source Failure to do so could cause serious injury or death N 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 troubles
27. ckaging 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 wrist 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 oscillo
28. e assembly See Figure 5 2 on page 5 7 1 Unattach 8 snaps 3 top 3 bottom 1 left and 1 right Work from a corner and keep tension on the case while moving to the next set of snaps 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 on the Front Panel board Display Module Follow these steps to remove the display module You need to have previously removed the power supply assembly I O board and Front Case assembly Use a Torx T 15 screwdriver tip See Figure 5 2 on page 5 7 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 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 Module 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 7 1 Remove the 9 screws holding the Front Panel board to the chassis 2 Lift the Front Panel
29. ear 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 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 Q ter Page 3 8 Waveform type voltage mination signal to 3 termination channel Time Mark Apply 500 mV Pk Pk 625 Page 3 9 Waveform type voltage Hz 50 Q termination frequency termination time mark signal to 3 channel Deskew Apply 1 0 V Pk Pk 1 kHz Page 3 10 Waveform type voltage 50 Q termination deskew frequency termination signal to 3 channel Sine Signal Apply 2 0 V Pk Pk 164M Page 3 11 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 th
30. en 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 Tektronix 4000 Series Technical Reference Incorrect use of calibration equipment can cause the oscilloscope to pass the Calibration Procedure but fail Performance Verification Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 3 7 Adjustment Procedures Completing the Procedure 3 8 DC Voltage 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 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 The DC Voltage test is the first test to appear on the prompts and it usually makes up the majority of the calibra
31. f 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 Repair 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 Tektronix 4000 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 solut
32. he module exchange program call 1 800 833 9200 extension 2 Module Repair and Return You may ship your module to us for repair after which we will return it to you New Modules You may purchase replacement modules in the same way as other replacement parts Using the Replaceable Parts List This section contains a list of the mechanical and or electrical components that are replaceable for the instrument Use this list to identify and order replacement parts The following table describes each column in the parts list 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 1
33. hese 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 m CAUTION indicates a hazard to property including the product The following symbols may appear on the product A O amp CAUTION Refer to Manual Protective Ground Earth Terminal Mains Connected arth Terminal ON Power Push button OUT Chassis Ground ILL Push button IN Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual SS a 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual V Service
34. hooting procedure screen Figure 4 4 Does Perform the Module Isolation the instrument pass troubleshooting procedure _allthe Figure 4 5 diagnostics Figure 4 3 Primary troubleshooting procedure Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 WARNING Be careful when measuring near the AC power supply there are line voltages present on exposed parts Are there 12 volts on the Replace the AC Power connector Supply module pins 2 Yes AC Power Supply module OK Return the MSO4000 oscilloscope to the nearest Tektronix Service Center for repair Figure 4 4 AC power supply troubleshooting procedure 4 14 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Continued from Figure 4 3 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 P
35. ion 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 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 as a m
36. justment Procedures The following table specifies required equipment for the DPO4000 Series oscilloscope Description Minimum requirements Example DC voltage source 50 mV to 70 V 0 1 amplitude Fluke or Wavetek 9500 accuracy Oscilloscope Calibrator with 9530 active heads Sine Generator 1kHz1 GHz Wavetek 9500 Oscilloscope 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 5 mm 003 1433 00 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
37. l 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual vii Environmental Considerations viii Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Preface Manual Conventions Modules Replaceable Parts Safety This service manual provides information that you need to troubleshoot disassemble and replace parts on the 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 General Safety Summary found at the beginning of this manual Related Documentation
38. nvironmental Considerations eere vii Preface irinen o e Vereine id la rs Du ius ix Manual Conventions anea o E E m ix Related Documentation lleeeeeeeee rreren ereere ix Operating Information ssssssssssesssssssssssessosss 1 1 Theory of Operation sessssssssssossosssssoesssoseoss 2 1 Block Diagranis 3 21 46 toe bah redea est a eit une he Eh 2 1 POWEESUDDly 022 tte coe despise te tds uice URP a ieee ate ath eg 2 2 VO Board Cenei I OO cu s 2 2 Maim Boards so mote euo ion d ieoet de ashen ate miata 2 2 Eronts Patel Board 25 5o edet PRX UH edel e ed E RR d 2 3 Adjustment Procedures cc cece cece cece cece cece eeeee 3 1 Required Equipment rones saa sanea aa cece eee ence nee 3 1 Overview of the Adjustment Process 0 ce eee cece eee eee ee 3 2 Factory Adjustment Procedure 0 0 cece eee eee 3 4 Completing the Procedure 3 8 Maintenance 2 cece cece cece ee cee hh e hh hh 4 1 Picventmp ESDu aote epa tui ite Parca dines sse ARE s tite 4 1 Inspection and Cleaning eseeeeeeeeeee e 4 1 General Cares soe Ep erre EDAD ee he QU nai dae de ORE edges 4 2 Interior Cleaning 32e eR E ee ote IO dest dede ct Sa wala es 4 2 Exteri r Cleaning iiu Deer repone RO avedagn Oe epica 4 2 Overview of Removal Procedures 0 0 cee eee cece eee eens 4 6 Removal Procedures 0 0 cece cece eee teen ene ene ens 4 8 Troubleshooting sinisem oe nip e UR ei age ce re EP vr
39. odule 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 l4 inch flat blade 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Rear case O KER bs C Front cover Figure 4 1 Locator for trim and cabinet removal Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 4 7 Maintenance Removal Procedures 4 8 A Power supply assembly Inverter board assembly Side fans Display assembly assembly l O board assembly
40. quired Equipment This chapter contains the factory adjustment procedure for the DPO4000 Series and the MSO4000 Series oscilloscopes Only qualified personnel should perform adjustment procedures Read the Service Safety Summary and 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 Tektronix 4000 Series Technical Reference documentation 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 MSO4000 Series oscilloscope Description Minimum requirements Example DC voltage source 50 mV to 70 V 0 1 amplitude Fluke or Wavetek 9500 accuracy Oscilloscope Calibrator with five 9530 active heads Digital calibrator probe Tektronix part number 174 4535 XX Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 3 1 Ad
41. rd 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 Ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 T
42. rews 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 assembly and Power Supply assembly Use a Torx T 15 and a P2 screwdriver tip See Figure 5 6 on page 5 15 1 Remove the 3 screws that 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 Board Follow these steps to remove the Power Supply board You need to have previously removed the Rear Case assembly and Power Supply assembly Use a Torx T 15 screwdriver tip See Figure 5 6 on page 5 15 1 Remove the 3 screws that attach the Power Supply cover 2 Lift off the Power Supply cover 3 Remove the 4 screws that attach the Power Supply board to the Power Supply bracket Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 assembly and Power Supply module Use a Torx T 15 screwdriver tip See Figure 5 6 on page 5 15 1 Remove the 5 screws that hold the I O board to the chassis 2 Lift straight up to remove Follow these steps
43. rt number see Part Number Revision Level below m Instrument type or model number Instrument serial number W 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 NA 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 5 1 Mechanical 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 t
44. scope malfunction and enhance its reliability Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 4 1 Maintenance 4 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
45. tes 3 10 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures CAUTION Keep the digital probe plugged in to the oscilloscope Unplugging the probe may result in aborting the test Sine Signal When a Sine Signal prompt appears complete the following steps 1 Push the Sine ae front panel button mm 2 To ensure that the voltage is in direct mode push the E 2 Jower bezel button and select 1 0 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 Onthe oscilloscope push the OK Do Next Step right bezel button Troubleshooting Refer to the next table for common issues encountered during the calibration procedure 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 can t find the parameters that
46. the analog signals from the preamplifiers and sends trigger information to the time base controller Advanced trigger functions are enabled only when the appropriate application modules and supporting software are installed The Display system combines live waveform data from acquisition memory with menus and text and stores this information in display memory It then uses this data to refresh the XGA display module LCD Tektronix 4000 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 USB ports and a CompactFlash port Power Converter The Power Converter receives 12 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual 2 3 Theory of Operation 2 4 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual A Adjustment Procedures SE ee Adjustment Procedures Re
47. tion procedure tests For each DC Voltage test complete all 8 steps listed below to best ensure that the test will pass 1 Push the DC Square 2 button 2 Push the WAVEFORM lower bezel button and then push the DC Positive ER right bezel button 3 Push the CHANNEL SELECT lower bezel button 4 Push the LOAD lower bezel button to highlight either 1M Q or 50 M Q 5 Select the specified channels by using the side bezel buttons and then click the EXIT lower bezel button 6 Ifthe 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 pet lower bezel 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 is grounded The calibrator screen will default to Channel 1 m For any non zero voltage Before you select the voltage you must first 1 ensure that the calibrator is in direct mode Push the BE button until 1 0 is selected v E lower bezel For6 V or 6 V a Push the AUX front panel button Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Adjustment Procedures b Push the ULA UA side
48. to remove the side fan assembly You need to have previously removed the Rear Case assembly Power Supply assembly and I O board Use a Torx T 15 screwdriver tip See Figure 5 8 on page 5 19 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 assembly power supply I O board and side fans Use a Torx T 15 screwdriver tip See Figure 5 8 on page 5 19 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 8 on page 5 19 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 Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual Maintenance Front Case Assembly Follow these steps to remove the Front Case assembly You must have pre viously removed the Rear Cas
49. ush 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 Comm module or Main board ROM Main board App Modules Front Panel or App Keys Figure 4 5 Module isolation troubleshooting procedure Tektronix 4000 Series Digital Phosphor Oscilloscopes 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 accessories 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
50. ustment Procedures Factory Adjustment Procedure 3 4 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 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 DPO4000 there will be either 2 or 4 channels to connect For the MSO4000 there will be either 2 or 4 channels to connect plus an additional channel connection for the digital probe Plug the digital probe into the Channel 5 active head on the calibrator but do not plug the probe into the oscilloscope until you begin a Deskew test 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

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