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Theory of Operation

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.

MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual

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Содержание DPO3000 Series

Страница 1: ...xx MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes ZZZ Service Manual P071266700 071 2667 00 ...

Страница 2: ......

Страница 3: ... 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 071 2667 00 ...

Страница 4: ...des 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 a...

Страница 5: ...d 2 2 Front Panel Board 2 3 Adjustment Procedures Adjustment Procedures 3 1 Required Equipment 3 1 Overview of the Adjustment Process 3 1 Factory Adjustment Procedure 3 2 Completing the Procedure 3 6 Maintenance Maintenance 4 1 Preventing ESD 4 1 Inspection and Cleaning 4 1 Overview of Removal Procedures 4 5 Removal Procedures 4 6 Troubleshooting 4 13 Troubleshooting Procedure 4 14 Unpacking and R...

Страница 6: ... Contents Replaceable Parts List Replaceable Parts List 5 1 Parts Ordering Information 5 1 Using the Replaceable Parts List 5 3 Index ii MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 7: ...igure 4 4 Disconnecting the main board 4 10 Figure 4 5 Display cable shield in place 4 12 Figure 5 1 Exploded view rear case and rear chassis 5 5 Figure 5 2 Exploded view I O and main boards 5 7 Figure 5 3 Exploded view Front panel and power supply 5 9 Figure 5 4 Exploded view Front panel labels 5 11 Figure 5 5 Exploded view Main board shield and attenuator board 5 13 Figure 5 6 Exploded view Fron...

Страница 8: ...parts list Front panel and power supply 5 8 Table 5 4 Replaceable parts list Front panel labels 5 10 Table 5 5 Replaceable parts list Attenuator 5 12 Table 5 6 Replaceable parts list Front chassis and LCD 5 14 Table 5 7 Replaceable parts list Front panel and front case 5 16 Table 5 8 Replaceable parts list Standard accessories 5 18 Table 5 9 Replaceable parts list Optional accessories 5 18 iv MSO3...

Страница 9: ...ll ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Connect the probe reference lead to earth ground only Do not apply a potential to any terminal including the common terminal that exceeds the maximum rating of that terminal Power Disconnect The power cord disconnects the product from the power source Do not bl...

Страница 10: ...n damage to this product or other property Symbols and Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product The following symbol s may appear on the product vi MSO300...

Страница 11: ...ng 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 component...

Страница 12: ...Service Safety Summary viii MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 13: ...t 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 Safety Symbols and terms related to safety appear in the General Safety Summary Related Documentation To read about Use these documents Installation and Operation MSO3000 and DPO3000 Series Oscilloscopes User Manual available in 11 languag...

Страница 14: ...Preface x MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 15: ...Operating Information ...

Страница 16: ......

Страница 17: ...ing your MSO3000 or DPO3000 Series Oscilloscope refer to the MSO3000 and DPO3000 Series Oscilloscopes User Manual This manual is available in 11 languages on the Web at www tektronix com MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 1 1 ...

Страница 18: ...Operating Information 1 2 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 19: ...Theory of Operation ...

Страница 20: ......

Страница 21: ...e following figure shows the oscilloscope module interconnections Block Diagram Figure 2 1 Oscilloscope module interconnections Power Supply The Power Supply board converts AC line voltage to 12 V and 6 V to power all internal circuits MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 2 1 ...

Страница 22: ...l from each preamplifier is also distributed to a trigger circuit Trigger System 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 the appropriate application modules and supporting software are installed Display System The Display system combines ...

Страница 23: ...t 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 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 2 3 ...

Страница 24: ...Theory of Operation 2 4 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 25: ...Adjustment Procedures ...

Страница 26: ......

Страница 27: ...the adjustment Required Equipment The following equipment or a suitable equivalent is required to complete these procedures The following table specifies required equipment for adjusting the oscilloscope Description Minimum requirements Example DC voltage source 50 mV to 70 V 0 1 amplitude accuracy Fluke or Wavetek 9500 Oscilloscope Calibrator with 9530 active heads Sine Generator 1 kHz 1 GHz Fluk...

Страница 28: ...d 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 th...

Страница 29: ...illoscope 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 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 the switch until the oscilloscope shows the Power on self test passed message with th...

Страница 30: ...page menu 10 Use the Multipurpose a knob to select Calibration Figure 3 3 Calibration selection 11 Push the Factory lower bezel button The information dialog appears 3 4 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 31: ...the signal type and then carefully follow the instructions for that signal type on the specified page Signal type Example prompt Procedure to follow Parameters to set DC Voltage Apply 0 V DC 50 Ω termination signal to 3 See page 3 6 DC Voltage Waveform type voltage termination channel Time Mark Apply 500 mV Pk Pk 625 Hz 50 Ω termination time mark signal to 3 See page 3 8 Time Mark Waveform type vo...

Страница 32: ...on 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 t...

Страница 33: ...ated only by the icon that appears in the upper left corner of the calibrator screen 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 CAUTION Once you pus...

Страница 34: ...rge 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 MSO3000 Series oscilloscope and you receive a prompt for a deskew test complete the following steps 1 Plug the probe notch down into the digital channel in...

Страница 35: ... minutes 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 front panel button 2 To ensure that the voltage is in direct mode push the lower bezel button and select 1 0 3 Push the CHANNEL SELECT lower bezel button and then ensure that Channel 5 ...

Страница 36: ...o 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 I 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 I can t set the signal to all channels If you are unable to set the signal to all channels...

Страница 37: ...Maintenance ...

Страница 38: ......

Страница 39: ...c protected containers or on a metal rail Label any package that contains static sensitive boards 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Service static sensitive modules only at a static free work station 4 Do not place anything capable of generating or holding a static charge on the work station surface 5 Handle circ...

Страница 40: ...edium Duty Wipes 05701 available from Kimberly Clark Corporation Interior Cleaning 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 instrum...

Страница 41: ...ls cracked insulation and deformed contacts Dirt in connectors Repair or replace defective modules Clear or wash out dirt Carrying handle and cabinet feet Correct operation Repair or replace defective module Accessories Missing items or parts of items bent pins broken or frayed cables and damaged connectors Repair or replace damaged or missing items frayed cables and defective modules If the displ...

Страница 42: ...ose plugs or connectors Burned broken or frayed wiring Firmly seat connectors Repair or replace modules with defective wires or cables Chassis Dents deformations and damaged hardware Straighten repair or replace defective hardware Cleaning Procedure Interior To clean the oscilloscope interior do the following steps 1 Blow off dust with dry low pressure deionized air approximately 9 psi 2 2 Remove ...

Страница 43: ... F to 140 F deionized water to thoroughly rinse them 4 Dry all parts with low pressure deionized air 5 Dry all components and assemblies in an oven or drying compartment using low temperature 125 F to 150 F circulating air Overview of Removal Procedures The following figure shows the location of modules that you are removing or installing Figure 4 1 Locator for internal modules MSO3000 and DPO3000...

Страница 44: ... Screwdriver with 1 8 inch flat blade 3 16 inch nut driver 5 16 in wrench 5 8 in wrench Needle nose pliers X ACTO knife or other razor knife Removal Procedures Beginning with the rear case remove modules as necessary to gain access to the module you need to remove WARNING Before doing any procedure in this subsection disconnect the power cord from the line voltage source Failure to do so could cau...

Страница 45: ...hing the rear chassis to the front chassis When reinstalling torque these screws to 8 0 in lb 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 f...

Страница 46: ... the fan power cable carefully See Figure 4 3 Figure 4 3 Fan cable dress I O Board 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 th...

Страница 47: ...ed 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 T15 screws that attach the Power Supply module to the chassis When reinstalling torque these screws to 8 0 in lb 5 Lift the Power Supply module including the power connector off of the chassis and place it...

Страница 48: ...connect the main board to the chassis When reinstalling torque these screws to 8 0 in lb 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 and use the chassis edge as the fulcrum See Figure 4 4 Figure 4 4 Disconnecting the main board 10 Lift the main board out of the ch...

Страница 49: ...s the shorter ones go through the side rail When reinstalling torque these screws to 8 0 in lb 4 Remove the attenuator board and place it on a static free surface Front Chassis 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 T15 screwdriver tip See Figure 5 6 on ...

Страница 50: ...ront chassis and remove the display cable shield When reinstalling torque these nuts to 8 0 in lb See Figure 4 5 Figure 4 5 Display cable shield in place 3 Turn the front chassis over and remove the eight T15 screws that connect the display to the front chassis See Figure 5 6 on page 5 15 When reinstalling torque these screws to 8 0 in lb 4 Gently lift the display up and off of the chassis CAUTION...

Страница 51: ...Module 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 T15 screwdriver tip See Figure 5 3 on page 5 9 See Figure 5 7 on page 5 17 1 Remove all the front panel knobs 2 Remove the 14 T15 screws 10 with ground spring contacts holding the Front Pan...

Страница 52: ...mple DMM 3 5 digits or greater Troubleshooting Procedure The following diagrams are troubleshooting procedure flowcharts Beginning with Flowchart 1 use them to troubleshoot an instrument failure WARNING Before removing the cabinet disconnect the power cord from the line voltage source Failure to do so could cause serious injury or death Flowchart 1 Primary troubleshooting procedure 4 14 MSO3000 an...

Страница 53: ...Maintenance Flowchart 2 AC power supply troubleshooting procedure MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4 15 ...

Страница 54: ...pe 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 4 16 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 55: ...of the instrument 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 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 c...

Страница 56: ...Maintenance 4 18 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ...

Страница 57: ...Replaceable Parts List ...

Страница 58: ......

Страница 59: ...mber Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Part Number Revision Level Tektronix part numbers contain two digits that show the revision level of th...

Страница 60: ...ured module These modules cost significantly less than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 833 9200 extension 2 Module Repair and Return You may ship your module to us for repair after which we will return it to you New Modules You may purchase replacement modules in the same way as other replacement parts 5 2 MSO30...

Страница 61: ...rial 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 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 ...

Страница 62: ...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 37...

Страница 63: ...Replaceable Parts List Figure 5 1 Exploded view rear case and rear chassis MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 5 ...

Страница 64: ...D ASSY 4 CH ACQUISITION BD MAIN 3894164XX TESTED MSO3014 870 0264 00 1 CIRCUIT BD ASSY 2 CH ACQUISITION BD MAIN 3894164XX TESTED MSO3012 870 0237 00 1 CIRCUIT BOARD ASSY 4 CH ACQUISITION BD 379377900 TESTED DPO3054 870 0236 00 1 CIRCUIT BOARD ASSY 2 CH ACQUISITION BD 379377900 TESTED DPO3052 870 0235 00 1 CIRCUIT BOARD ASSY 4 CH ACQUISITION BD 379377900 TESTED DPO3034 870 0234 00 1 CIRCUIT BOARD A...

Страница 65: ...Replaceable Parts List Figure 5 2 Exploded view I O and main boards MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 7 ...

Страница 66: ...NE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL ZNPL T15 3 211 1273 00 1 SCREW PT K35 1 57 PAN HEAD STL ZNPL T 15 4 366 0865 00 1 KNOB JOG 5 358 0883 00 1 BUSHING JOG SHUTTLE KNOB 6 366 0867 01 1 KNOB SHUTTLE 7 366 0861 01 2 KNOB 925 DIA SOFT TOUCH 366 0859 01 6 KNOB 470 DIA SOFT TOUCH 4 CHANNEL MODELS 8 366 0859 01 4 KNOB 470 DIA SOFT TOUCH 2 CHANNEL MODELS 366 0860 01 5 KNOB 685 D...

Страница 67: ...Replaceable Parts List Figure 5 3 Exploded view Front panel and power supply MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 9 ...

Страница 68: ...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 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 5 4 1 335 1917 00 1 LABEL FRONT PANEL OVERLAY FRENCH 2 200 5049 00 1 COVE...

Страница 69: ...Replaceable Parts List Figure 5 4 Exploded view Front panel labels MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 11 ...

Страница 70: ...D MAINBOARD DPO3032 Only C011229 1 SHIELD MAINBOARD DPO3014 Only C010713 1 SHIELD MAINBOARD DPO3012 Only 337 4462 00 1 SHIELD MAINBOARD MSO3000 Series ATTACHED PART Order by description 1 GASKET FOAM CONDUCTIVE W ADHESIVE 5 0 INCH of 348 1863 00 5 5 1 END ATTACHED PART 2 211 1275 00 7 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL ZNPL T15 3 211 1272 00 8 SCREW MACHINE 6...

Страница 71: ...Replaceable Parts List Figure 5 5 Exploded view Main board shield and attenuator board MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 13 ...

Страница 72: ...121 CHASSIS FRONT SAFETY CONTROLLED DPO3054 Only C010309 CHASSIS FRONT SAFETY CONTROLLED DPO3052 Only C011323 CHASSIS FRONT SAFETY CONTROLLED DPO3034 Only C010538 CHASSIS FRONT SAFETY CONTROLLED DPO3032 Only C011229 CHASSIS FRONT SAFETY CONTROLLED DPO3014 Only C010713 CHASSIS FRONT SAFETY CONTROLLED DPO3012 Only 5 6 1 441 2570 00 CHASSIS FRONT SAFETY CONTROLLED MSO3000 Series 2 211 1273 00 8 SCREW...

Страница 73: ...Replaceable Parts List Figure 5 6 Exploded view Front chassis and LCD assembly MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 15 ...

Страница 74: ...0 DPO 4 CHANNEL MODELS 5 7 1 878 0028 01 1 CIRCUIT BOARD ASSY 2 CH FRONT PANEL TESTED 389378000 DPO 2 CHANNEL MODELS 2 211 1273 00 18 SCREW PT K35 1 57 PAN HEAD STL ZNPL T 15 3 131 8139 00 10 CONTACT SPRING FRONT PANEL ELEC 4 260 2853 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 4 CHANNEL 050 3717 00 1 PARTS REPL KIT 4CH FRONT PANEL ASSY MSO3014 3034 3054 050 3716 00 1 PARTS REPL KIT 2 CH FRONT PANE...

Страница 75: ...Replaceable Parts List Figure 5 7 Exploded view front panel board and front case MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5 17 ...

Страница 76: ...67 00 1 POUCH PLASTIC POUCH 010 6316 01 1 MSO PROBE 16 CHANNEL DIGITAL PROBE GENERAL PURPOSE P6316 Table 5 9 Replaceable parts list Optional accessories Tektronix part number Serial no effective Serial no discont d Name description 800 0042 xx DPO3AUTO Replacement Module 800 0043 xx DPO3COMP Replacement Module 800 0044 xx DPO3EMBD Replacement Module 800 0045 xx DPO3VID Replacement Module 119 7465 ...

Страница 77: ...Index ...

Страница 78: ......

Страница 79: ...O board removal 4 8 internal modules 4 5 M main board functions 2 2 main board removal 4 10 manual conventions ix manuals ix module interconnections 2 1 P power converter description 2 2 power supply removal 4 9 power supply 2 1 probe compensation 2 3 processor system description 2 2 R rear case removal 4 7 rear chassis removal 4 7 removal procedures 4 5 4 6 attenuator board 4 11 display module 4 ...

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