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Service Manual TDS 340A, TDS 360 & TDS 380 Digital

1. Vertical position S ls lo 9 Horizontal position Left side of instrument 9 9 Brightness S Contrast een Front of instrument V Figure 5 4 Monitor adjustments 7 Now lower the brightness just beyond the point where the background fades to black 8 Locate the contrast potentiometer Adjust the contrast to your taste CAUTION The higher the contrast the higher the likelihood that prolonged use will cause CRT burn in 9 Locate the vertical position potentiometer Adjust the vertical position until the display is vertically centered on the screen 10 Locate the horizontal position potentiometer Adjust the horizontal position until the display is horizontally centered on the screen TDS 340A TDS 360 amp TDS 380 Service Manual 5 7 Adjustment Procedures 5 8 TDS 340A TDS 360 amp TDS 380 Service Manual Maintenance Preventing ESD Precautions This chapter describes how to inspect clean remove and troubleshoot the oscilloscope at the module level Preventive maintenance when done regularly may prevent oscilloscope malfunction and enhance its reliability Preventive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it How often to do maintenance depends on the severity of the environment in which you use the oscilloscope A proper time to perform preventive maintenance i
2. or CH2 TDS 340A 0 35 division from DC to 20 MHz increasing to 1 div at 100 MHz TDS 360 0 35 division from DC to 50 MHz increasing to 1 div at 200 MHz TDS 380 0 35 division from DC to 50 MHz increasing to 1 div at400 MHz External TDS 340A 50 mV from DC to 20 MHz increasing to 150 mV at 100 MHz TDS 360 50 mV from DC to 50 MHz increasing to 150 mV at 200 MHz TDS 380 50 mV from DC to 50 MHz increasing to 500 mV at 400 MHz External 10 TDS 340A 500 mV from DC to 20 MHz increasing to 1 5 V at 100 MHz TDS 360 500 mV from DC to 50 MHz increasing to 1 5 V at 200 MHz TDS 380 500 mV from DC to 50 MHz increasing to 5 0 V at 400 MHz Input Impedance External Trigger 1 MQ 2 in parallel with 20 pF 2 pF Maximum Input Voltage 300 V DC or AC CAT Il derate at 20 dB decade above 100 kHz to 13 V peak AC at External Trigger 3 MHz and above 1 Net Offset Offset Position x Volts Div Net Offset is the voltage level at the center of the A D converter dynamic range Offset Accuracy is the accuracy of this voltage level Table 1 4 Power Requirements Description Source Voltage and Frequency 90 to 132 VACpms continuous range for 47 Hz through 440 Hz 132 to 250 VACg ms continuous range for 47 Hz through 63 Hz Power Consumption 65 Watts 120 VA TDS 340A TDS 360 amp TDS 380 Service Manual 1 3 Specifications Table 1 5 Warranted characteristics environmental
3. 6 27 The diagnostics menu 6 29 The e rrorlog u ea 6 31 Main board cal jumper 6 32 Primary troubleshooting procedure 6 33 Figure 6 19 Figure 6 20 Module isolation troubleshooting proced re rene Seeger nennen 6 34 Figure 6 21 Front panel processor troubleshooting procedure were ann es e EI nenne 6 35 Figure 6 22 Monitor troubleshooting procedure 6 36 Figure 6 23 J901 pin 7 signal 6 37 Figure 6 24 J901 pin 2 signal 6 37 Figure 6 25 J901 pin 5 signal 6 38 Figure 6 26 Power supply troubleshooting procedure 6 39 Figure 6 27 Power supply connector locations 6 40 Figure 6 28 Power supply overload troubleshooting proced re 4 ee eru se ln 6 41 Figure 6 29 Option 14 VO interfaces troubleshooting proced re Ra ER ee hr ex T RE res 6 42 Figure 10 1 Cabinet and front panel assembly 10 6 Figure 10 2 CRT power supply and circuit boards 10 8 Figure 10 3 Accessories 10 10 TDS 340A TDS 360 amp TDS 380 Service Manual Contents List of Tables Table 1 1 Warranted characteristics signal acquisition ric Mec c nn ne Beh we em 1 1 Table 1 2 Warranted characteristics tim
4. Figure 6 13 Low voltage power supply removal 6 24 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Option 14 Assembly Required tools a screwdriver with a size T 15 Torx tip Items 1 and 2 and a 3 16 inch nut driver Item 7 1 Set the oscilloscope so its top is down on the work surface with its front facing towards you Disconnect the main board communications cable J601 at the main board or at the floppy interface board Remove the cable from its cable clamp see Figure 6 14 Refer to Page 6 18 step 3 for instructions on how to remove the floppy interface board Disconnect the video cable J703 at the main board Remove the two screws connecting the assembly to the chassis see Figure 6 14 using a screwdriver with a size T 15 Torx tip Set the oscilloscope so its bottom is down on the work surface with its rear facing towards you Disconnect power cable J4 from the power supply Using a screwdriver with a size T 15 Torx 9 tip remove the two screws on the left side of the assembly see Figure 6 14 Now remove the two screws on the rear panel that fasten the assembly to the chassis Pull the assembly towards the front of the instrument and up and out of the chassis Carefully route the cables through their holes in the chassis 10 Reinstallation Perform steps 9 through 2 in reverse order TDS 340A TDS 360 amp TDS 380 Service Manual 6 25 Removal and Replac
5. 4 Removal and Replacement This section contains procedures for removal and installation of all mechanical and electrical modules Preparation Please Read A General Instructions WARNING To avoid injury or death disconnect the power cord from the line voltage source before performing any procedure in this section STOP READ THESE GENERAL INSTRUCTIONS BEFORE REMOVING A MODULE First locate the module you want to remove in the exploded views Figures 10 1 and 10 2 on pages 10 6 and 10 8 Then read Equipment Required for a list of the tools needed to remove and install modules in this oscilloscope To remove an internal module you need only remove the oscilloscope cabinet page 6 11 and then perform the removal procedure for that module The internal modules are independently removable 66 66 Procedures will refer to front rear top etc of the oscilloscope note from Figure 6 1 which sides are referenced TDS 340A TDS 360 amp TDS 380 Service Manual 6 5 Removal and Replacement 6 6 Equipment Required Figure 6 1 Oscilloscope orientation The tools listed in Table 6 3 are required to completely disassemble the oscilloscope into its modules The tools required to remove an individual module are listed before the first step of its procedure All the tools are standard tools readily available from tool suppliers Table 6 3 Tools required for module removal
6. 0 cece cece eh 2 7 Theory of Operation Logic Conyentlons 5 o o oe att Ac EO Ansehen 3 1 Module Overview 3 1 Performance Verification Conventions Ne RUE ee 4 1 Test Equipment veh EE E en Cere BAS 4 3 Test Recordosi i IR ae Er guod vie COA 44 Self Test oid bc aig e ha bench aeu va e ree x rea ix 4 5 Functional als 4 7 Performance Tests en 4 11 Prerequisites je Ls rs Rte e a ERG RT ASCENSU CS 4 11 Signal Acquisition System Checks 4 11 Time Base System Checks sas 4 16 Tigger Syste Checks aan ar en 4 18 Sine Wave Generator Leveling Procedure 4 20 TDS 340A TDS 360 amp TDS 380 Service Manual i Contents Adjustment Procedures Maintenance Options Electrical Parts List Diagrams Mechanical Parts List Equipment Required ic tosan neen a a E nennen 5 1 The System Calibration Menu 5 2 Attenuator Adjustment 0 0 00 00 eee cee eee eee 5 4 Monitor Adjustments eee nee 5 6 Preventing ESD gis ce xe a Re xr Rr or Eee P eS ET 6 1 General Care essen 6 2 Inspection and Cleaning Procedures 6 2 Removal and Replacement 6 5
7. Set the test signal amplitude for about one division on screen Fine adjust the generator output until the CH 1 Amplitude readout indicates the amplitude is 500 mV Readout may fluctuate around 500 mV Press TRIGGER MENU Slope Press SET LEVEL TO 50 Check that a stable trigger is obtained for the test waveform on both the positive and negative slopes see Figure 4 10 Use the side menu to switch between trigger slopes use the trigger LEVEL knob to stabilize the trigger if required Edge Slope Jf chi Ampl X 498 6mV i Las ES 8 9 10 11 12 13 14 15 First seta signal with an amplitude atthe minimum trigger sensitivity Second check for a stable trigger at both the positive and negative slope settings Ns 500mV M 10ns Chi Coupling Slope Level Mode DC X 10mv Normal SCISISICIO Holdoff Source chi 500ns S Figure 4 10 Measuring trigger sensitivity TDS 340A TDS 360 amp TDS 380 Service Manual 4 19 Performance Tests Trigger Level Accuracy DC Coupled 16 Press WAVEFORM OFF 17 Press CH 2 18 Press TRIGGER MENU Source Ch2 19 Disconnect the hookup from CH 1 and connect it to CH 2 20 Set the vertical SCALE to 500 mV div 21 Repeat steps 14 and 15 for Channel 2 22 Press TRIGGER MENU Sour
8. ilLljl1l Ix l 308 1 mm 12 13 in 165 mm 6 5 in 000000 0 0 0 OH 00 005 00 000000 569 22 4 I Figure 1 1 TDS 340A TDS 360 amp TDS 380 dimensions TDS 340A TDS 360 amp TDS 380 Service Manual 381 mm 15 in 1 11 Specifications Table 1 17 Certifications and compliances EC Declaration of Conformity Certifications FCC Compliance CSA Certified Power Cords Overvoltage Category Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility and Low Voltage Directive 73 23 EEC for Product Safety Compliance was demonstrated to the following specifications as listed in the Official ournal ofthe European Communities EMC Directive 89 336 E EC EN 55011 Class B Radiated and Conducted Emissions EN 50081 1 Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity IEC 801 5 Power Line Surge Immunity Low Voltage Directive 73 23 EEC EN 61010 1 Safety requirem
9. RS232 Line Snapshot RS232 Errors 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 Acq 0 CPU 18 Displa Option 0 Cal 0 Rom er nvram error er nvram error memory error pud memory error memory error memory error memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error save recall memory error Push CLEAR MENU to continue y 0 FP 0 2 waiting For Q No CTS Low Chars Rcvd No Parity 0 Framing 0 Overrun 0 PAGE 1 of 1 Figure 6 17 The error log Enabling Calibration Menus The Voltage Timing and External Trigger calibration menus are disabled at the factory To enable the calibration menus perform the following steps Remove the Line Cord as described on page 6 8 Remove the Rear Cover and Cabinet as described on page 6 11 Set the oscilloscope so its top side is down on the work surface and its front is facing you Remove cal jumper J609 from the main board see Figure 6 18 Save the jumper Reinstall the jumper after calibration to protect the calibration settings Reinstallation Perform in reverse
10. Remove the four T 15 Torx screws securing the rear cover to the oscillo scope Lift off the rear cover If no other parts are being serviced skip to the end step 10 of this procedure Remove the single T 15 Torx screw at the left side of the oscilloscope Lift the cabinet upwards to slide it off the oscilloscope If no other cabinet parts are being serviced skip the rest of this procedure Working from the inside of the cabinet remove the T 20 Torx screw securing each handle hub to the cabinet Working from the outside of the cabinet grasp the two handle hubs and pull them outward from the cabinet until they are out of the cabinet While holding the handle hubs pulled out lift the handle away to remove 10 Reinstallation a Do in reverse order steps 8 and 7 to reinstall the handle assembly b Do in reverse order steps 5 through 3 to reinstall the cabinet while observing the following precautions m Take care not to bind or snag the cabinet on internal cabling redress cables as necessary m When sliding the cabinet onto the oscilloscope be sure that the front and rear ridges of the main chassis slide into the grooves at the rear of the cabinet and on the front trim m Install the four screws at the rear panel before installing the single screw at the left side of the cabinet TDS 340A TDS 360 amp TDS 380 Service Manual 6 11 Removal and Replacement Mounting screws 4 EMI gasket Acce
11. TDS 340A TDS 360 amp TDS 380 Service Manual 3 3 Theory of Operation Monitor Front Panel Floppy Disk Drive Option 14 34 Processor System The processor system contains a 68331 microprocessor that controls the entire instrument The processor passes waveforms and text on to the display system The Main Board contains both the processor and display systems in addition to the firmware ROMs Display System A display controller IC processes text and waveforms The display system sends the text and waveform information to the monitor assembly as a video signal The display system also generates and sends vertical VSYNC and horizontal HS YNC sync signals to the monitor assembly All information waveforms text graticules and pictographs is displayed by the A26 Monitor It generates the high voltages necessary to drive the display tube It also contains the video amplifier horizontal oscillator and the vertical and horizontal yoke driver circuitry The processor system sends instructions to and receives information from the Front Panel Processor on the Front Panel Board The Front Panel Processor reads the front panel switches and ports and reports any change in their settings to the processor system The Front Panel Processor also turns front panel LEDs on and off The Front Panel Processor reads the front panel menu switches and sends any changes in menu selections to the processor system The ON STBY button is not
12. 19 20 Press AUTOSET Set the VOLTS DIV to 1 V Use the vertical POSITION knob to center the waveform vertically on screen Set the SEC DIV to 250 us Check that a square wave probe compensation signal of about five divisions in amplitude is on screen Check that one period of the square wave probe compensation signal is about four horizontal divisions on screen Check that the horizontal POSITION knob positions the signal left and right on screen when rotated Press the front panel button TRIGGER MENU the main menu button Mode and then the side menu button Normal Check that the trigger level readout for the main trigger system changes with the trigger LEVEL knob Check that the trigger level knob can trigger and untrigger the square wave signal as you rotate it Leave the signal untriggered Check that pressing SET LEVEL TO 50 triggers the signal that you just left untriggered Press the front panel button ACQUIRE the main menu button Mode and then the side menu button Sample Check that the oscilloscope displays an actively acquiring waveform Note that there is noise present on the peaks of the square wave Press the side menu button Peak Detect Check that the oscilloscope displays an actively acquiring waveform with the noise peak detected Press the side menu button Envelope Check that the oscilloscope displays an actively acquiring waveform with the noise displayed Press the side menu button Av
13. Preparation Please Read 6 5 Line Fuse and Line Cord 6 8 Front Panel Knobs and Shafts 6 10 Rear Cover Cabinet and Cabinet Handle 6 11 Disk Dives Lu arto LR See ec tace oec pent a e E Ron 6 13 Trim Ring Menu Elastomer Menu Buttons and Front EMI Gaskets 6 14 Front Panel Assembly and Menu Flex 6 16 Main Assembly ip nen 6 18 Monitor Assembly 5 2 bag ee ana 6 21 Power Supply Assembly 20 0 eee eee eee en 6 23 Option 14 Assembly ee en 6 25 Fan and Fan Mount 2 24 coca hot aaa sieh 6 27 Troubleshooting y ne een 6 29 Onboard Diagnostics ernennen 6 29 Enabling Calibration Menus 6 31 Troubleshooting Procedure 6 32 Repackaging Instructions 6 43 an Ne ee le Pee ee SACRIS T STRIS AS 7 1 Standard ACCesSOFIeS sen e NERO YR RIA ne POR RG 7 3 Optional Accessories n REN EHE EIER SITE ERES US 7 3 ACCeSSOLy PrOD6S ERIS E ACRI E SISTER RIS GE NIS SUCRE 7 4 ACCES SOLY Cables i ro e DIR TERT RS ER IIIS TCI VE 7 4 Electrical Parts 6 aan 8 1 Diagrams xc ee EROS RR VE Sa RE
14. TDS 380 Service Manual 2 1 Operating Information Vertical Controls C O CH 1 OCH2 The Vertical POSITION knob controls OD VERTICAL ED the vertical position ofthe selected Z POSTION waveform The Waveform Select buttons display CS and selectwaveforms CH1 CH2 MATH REF1 and REF2 lightnextto a button lt OREF1 VERTICAL illuminates when that waveform i MENU I C D The VERTICAL MENU button calls up c OH the vertical operations menu WAVEFORM OFF 9 PROBE COMP n Connector to chassis ground gt CE The SCALE knob controls the vertical scale of the selected waveform Probe compensation output The WAVEFORM OFF button tums off the selected waveform Horizontal Controls HORIZONTAL lt Position gt B H 1 The Horizontal POSITION knob controls the horizontal position of all waveforms HORIZONTAL MENU r The HORIZONTAL MENU button calls up ae the horizontal operations menu The SCALE knob controls the horizontal scale of the active waveforms 2 2 TDS 340A TDS 360 amp TDS 380 Service Manual Operating Information Trigger Controls EEE TRIGGER TRIGGER The SET LEVEL TO 5096 button sets the MENU trigger level at the midpoint between the peaks of the trigger signal FORCE TRIGGER The FORCE TRIGGER button forces the 1 2 oscilloscope to start acquiring a waveform regardless of whether a trigger event
15. and TDS 380 The specifications are divided into three subsections one for each of three classes of traits Warranted Characteristics Typical Characteristics and Nominal Traits Warranted Characteristics Performance Conditions Warranted characteristics are described in terms of quantifiable performance limits that are warranted This subsection lists only warranted characteristics NOTE In these tables those warranted characteristics that are checked in the Performance Tests starting on page 4 11 appear in boldface type under the column Name The electrical characteristics found in these tables of warranted characteristics apply when the oscilloscope has been adjusted at an ambient temperature between 20 C and 30 C has had a warm up period of at least 20 minutes and is operating at an ambient temperature between 10 C and 55 C unless otherwise noted Table 1 1 Warranted characteristics signal acquisition system Name Description Accuracy DC Voltage Measurement Measurement type DC accuracy Average Acquisition Mode Average of 216 waveforms 2 0 x reading Net Offset Offset Accuracy DC Gain Sample or Average Acquisition Modes Pulse Response Peak Detect and Envelope Mode Accuracy 0 1 div Delta volts between any two averages of 2 0 x reading 0 15 div 0 3 mV 216 waveforms acquired under the same setup and ambient conditions 2 Sec Div setting Minimum pulse width 5 s
16. occurs This button has no effect if the acquisition system is stopped 300V lt 400V pk CH 1 CH2 SATI AN i EXT TRIG SET LEVEL P nr Er TRIGD The Trigger LEVEL knob controls the trigger The TRIGGER MENU button calls up the trigger menu The trigger status lights indicate the status of the triggering system The TRIG D light illuminates when the instrument recognizes a valid trigger The READY light illuminates when the instrument can accept a valid trigger and is waiting for that event to occur The channel BNC inputs CH1 and CH2 accept electrical signals for display TDS 340A TDS 360 amp TDS 380 Service Manual The EXT TRIG input accepts external trigger signals Operating Information Miscellaneous Controls The MEASURE button calls up the automated measurements menu The floppy disk drive provides The RUN STOP button starts mass storage for waveforms and stops acquisition setups and hard copies The UTILITY button calls up the utility menu The AUTOSET button automatically sets up the instrument to produce a usable display of the input signals The HARDCOPY button starts print operations Requires Opt 14 installed gt X MEASURE RUN STOP SAVE RECALL CURSOR DISPLAY ACQUIRE SELECT The General Purpose Knob controls many
17. read by the Front Panel Processor but passes through the Front Panel Board and the Main Board to the A20 Low Voltage Power Supply The front panel also generates the probe compensation signal The floppy disk drive system consists of the A5 floppy interface board that connects to the main board A 26 pin cable connects the floppy disk drive to the floppy interface board supplying both power and data to the drive The drive is 2 Mbyte double side high density unit that uses 3 5 inch IBM for mat disks The A2 Option 14 board has GPIB RS 232 and Centronics interfaces for external control and hardcopy operations Also included is the A3 board with a VGA video output port and a power connector for the Option 3P printer TDS 340A TDS 360 amp TDS 380 Service Manual Theory of Operation Low Voltage Power Supply A20 Low Voltage Power Supply is a switching power converter It supplies power to all the circuitry in the oscilloscope The Low Voltage Power Supply does not have a main power switch The ON STBY switch located on the front panel controls all the power to the oscilloscope except the standby circuits in the Low Voltage Power Supply Fan The fan provides forced air cooling for the oscilloscope It connects to a 12 V connector on the Low Voltage Power Supply TDS 340A TDS 360 amp TDS 380 Service Manual 3 5 Theory of Operation 3 6 TDS 340A TDS 360 amp TDS 380 Service Manual SE Performance Verif
18. 3 Tools required for module removal 6 6 Table 6 4 Power supply secondary voltages 6 40 TDS 340A TDS 360 amp TDS 380 Service Manual V Contents vi Table 7 1 VGA output connector PINS 7 1 Table 7 2 International power cords eee 7 2 Table 7 3 Language options 7 2 Table 7 4 Standard accessories 7 3 Table 7 5 Optional accessories 7 3 Table 7 6 Accessory cables 7 4 Table 10 1 Certifications and compliances 10 1 TDS 340A TDS 360 amp TDS 380 Service Manual fcc a General Safety Summary Injury Precautions 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 the product only as specified Only qualified personnel should perform service procedures While using this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system Use Proper Power Cord To avoid fire hazard use only the power cord specified for this product Avoid Electric Overload To avoid electric shock or fire hazard do not apply a voltage to a terminal that is outside the range specified for that termina
19. 5 ns div to 5 s div in a 1 2 5 5 sequence TDS 360 2 5 ns div to 5 s div in a 1 2 5 5 sequence TDS 380 1 ns div to 5 s div in a 1 2 5 5 sequence 16 5 ns to 50 seconds 1 000 samples 1 Therange of real time rates expressed in samples second at which a digitizer samples signals at its inputs and stores the samples in memory to produce a record of time sequential samples The Waveform Rate WR is the equivalent sample rate of a waveform record For a waveform record acquired by real time sampling of a single acquisition the waveform rate is the same as the real time sample rate for a waveform created by interpolation of real time samples from a single acquisition or by equivalent time sampling of multiple acquisitions the waveform rate is faster than the real time sample rate For all three cases the waveform rate is 1 Waveform Interval for the waveform record where the waveform interval WI is the time between the samples in the waveform record Table 1 12 Nominal traits triggering system Name Range Hold Off Ranges Trigger Level Formats and Field Rates Video Trigger TekP robe Interface External Trigger Description 500 ns minimum to 10 seconds maximum Source Range Any Channel 12 divisions from center of screen External 11 5 Volts External 10 15 Volts Line 300 Volts Triggers from sync negative composite video 525 to 625 lines 50 Hz to 60 Hz interlaced or noninterlaced systems with scan rates f
20. 9 pin D connector on the rear panel Table 7 6 on page 7 4 gives the part number of a properly shielded cable that is commercially available Because display manufacturers use different pin combinations and connectors you may find the information in Table 7 1 helpful Table 7 1 VGA output connector pins Pin Signal 2 Video monochrome analog 4 Horizontal sync 31 5 kHz VGA rate 5 Vertical sync 6 7 8 Ground TDS 340A TDS 360 amp TDS 380 Service Manual 7 1 Options Options A1 A5 International Power Cords Language Options Warranty Plus Service 7 2 Options Besides the standard North American 110 V 60 Hz power cord Tektronix ships any of five alternate power cord configurations with the oscilloscope when ordered by the customer see Table 7 2 Table 7 2 International power cords Option Power Cord Al Universal European 220 V 50 Hz A2 UK 240 V 50 Hz A3 Australian 240 V 50 Hz A4 North American 240 V 60 Hz A5 Switzerland 220 V 50 Hz Language options provide user documentation in local languages refer to Table 7 3 for options and manual part numbers Table 7 3 Language options Language option Language User manual Reference Std English 070 9459 00 070 9434 00 L1 French 070 9431 00 L3 German 070 9432 00 L4 Spanish 070 9433 00 L5 Japanese 070 9440 00 070 9441 00 L7 Simple Chinese 070 9437 00 L8 Standard Chinese 070 9438 00 L9 Korean 070
21. 9 pin female to 25 pin male connectors 15 feet 012 1241 00 for modems Centronics 25 pin male to 36 pin Centronics 012 1214 00 2 4 meter 8 feet for parallel printer interfaces NEC VGA video cable Use an appropriate adapter 13893029 when other than a 9 pin monitor connection is needed 7 4 TDS 340A TDS 360 amp TDS 380 Service Manual E P F M M Hr Electrical Parts List The modules that make up the TDS 340A TDS 360 and TDS 380 are listed in Section 10 Mechanical Parts List beginning on page 10 1 TDS 340A TDS 360 amp TDS 380 Service Manual 8 1 Electrical Parts List 8 2 TDS 340A TDS 360 amp TDS 380 Service Manual o Diagrams The TDS 340A TDS 360 and TDS 380 block interconnect diagrams are shown in Figures 3 1 and 3 2 starting on page 3 2 TDS 340A TDS 360 amp TDS 380 Service Manual 9 1 Diagrams 9 2 TDS 340A TDS 360 amp TDS 380 Service Manual A Mechanical Parts List This section contains a list of the replaceable modules for the TDS 340A TDS 360 and TDS 380 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 ord
22. AN m DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal Refer to Manual Insulated Certifications and Refer to the specifications section for a listing of certifications and compliances Compliances that apply to this product TDS 340A TDS 360 amp TDS 380 Service Manual ix General Safety Summary x TDS 340A TDS 360 amp TDS 380 Service Manual Er eT 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 disconnect the main power by means of the power cord or if provided the power switch Use Caution When Servicing the CRT To avoid electric shock or injury use extreme caution when handling the CRT Only qualified personnel familiar with CRT servicing procedures and precautions should remove or install the CRT CRTs retain hazardous voltages for long periods of time after power is turned off Before attempting any servicing discharge the CRT by shorting the anode to chassis ground When discharging the CRT connect the discharge path to ground and then the anode Rough handling may cause the CRT to implode Do not nick or scratch the glass or subject
23. Floppy interface J52 board Floppy disk drive 50 Pins gt gt 50Pins 26Pins gt mees alle a 77 J 606 51 da JU TRIG 607 Figure 3 1 TDS 340A TDS 360 amp TDS 380 block diagram 3 2 TDS 340A TDS 360 amp TDS 380 Service Manual Theory of Operation A20 LV Power J2 gt e A9 Bezel Button Flex Supply 2 Pins gt e Fan A3 Option 14 P4 Printer Power 10 Pins 2 Mas 29 P1 2 Pins e 2Pins V 3 I 2Pins PWR AG Y 40 2 Pins gt FrontPanel 10 Pins 11 1 3 13Pis gt gt 9 Pins gt 35 4 Pins gt Cal Sig 13 Eu 13 Pins e J30 P30 P603 jg P703 26 Monitor 16Pins gt gt 16 lt lt 16 Pins 6Pins gt J901 J 8 10 Pins A5 Floppy interface board 52 Floppy disk drive U J53 ES mu 1605 Ce J601 JR3 1 mr 77 606 50 Pins gt gt 50Pins 26Pins gt lt 26 Pins J51 J2 50 Pins TRIG 1 dy J607 P601 A2 Opton14 RS232 1 0 Interfaces E 50 4 n 25 Pins gt amp 50 Pins 50 Terminations 25 Pins CENTRONICS Figure 3 2 TDS 340A TDS 360 and TDS 380 with Option 14 block diagram
24. Name Description Atmospherics TDS 340A TDS 360 or Temperature without diskette in floppy disk drive TDS 380 M C to 450 C operating 22 C to 460 C non operating Temperature with diskette in floppy disk drive 410 C to 450 C operating or non operating Relative humidity without diskette in floppy disk drive to 80 at or below 429 C or to 20 from 30 C to 450 C operating to 90 ator below 440 C or to 5 from 441 C to 450 C non operating Relative humidity with diskette in floppy disk drive to 80 at or below 429 C orto 20 from 430 C to 450 C operating or non operating Altitude To 15 000 ft 4570 m operating to 40 000 ft 12190 m non operating Dynamics Random vibration without diskette in floppy disk drive 0 31 g nus from 5 to 500 Hz 10 minutes each axis operating 2 46 0 nus from 5 to 500 Hz 10 minutes each axis non operating 1 4 TDS 340A TDS 360 amp TDS 380 Service Manual Specifications Typical Characteristics Typical characteristics are described in terms of typical or average performance Typical characteristics are not warranted Table 1 6 Typical characteristics signal acquisition system Name Description Accuracy DC Gain Envelope 3 for sec div settings from 5 Sec Div to 25 usec div Acquisition Mode 2 for sec div settings from 10 us div to 5 ns div TDS 340A 2 for sec div settings from 10 us div to 2 5 ns div TDS 360 2 for sec div settings f
25. Rn 9 1 Parts Ordering Information 8 55 10 1 Using the Replaceable Parts List 10 2 TDS 340A TDS 360 amp TDS 380 Service Manual Contents List of Figures Figure 1 1 TDS 340A TDS 360 amp TDS 380 dimensions 1 11 Figure 2 1 A pop up menu 2 8 Figure 2 2 Using 2 9 Figure 3 1 TDS 340A TDS360 amp TDS380 block diagram 3 2 Figure 3 2 TDS 340A TDS360 amp TDS380 block diagram with Option 14 3 3 Figure 4 1 Menu locations 4 2 Figure 4 2 Verifying adjustments and signal path compensation mesh e ER ea RR E RUE ER ea ee 4 6 Figure 4 3 Hookup for functional test 4 7 Figure 4 4 Hookup for file system functional test 4 9 Figure 4 5 Hookup for DC voltage measurement accuracy eere n rex es E UE M Ee eR Se 4 12 Figure 4 6 Hookup for analog bandwidth check 4 14 Figure 4 7 Measuring analog bandwidth 4 15 Figure 4 8 Hookup for sample rate check 4 16 Figure 4 9 Hookup for trigger sensitivity check 4 18 Figure 4 10 Measuring trigger sensitivity 4 19 Figure 4 11 Hookup for sine wave generator leveling 4 21 Figure 5 1 The system
26. To avoid injury or death unplug the line cord from the line voltage power source before continuing Required tool a flat bladed screwdriver Item 4 1 Set the oscilloscope so its bottom is down on the work surface and its rear is facing you 2 Find the line cord on the rear cover See Figure 6 2 Now remove the line cord retaining clamp by first unplugging the line cord from its recep tacle 3 Next grasp both the line cord and the retaining clamp and rotate them 90 degrees counter clockwise 3 Pull Figure 6 2 Line cord removal 6 8 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement 4 Pull the line cord and clamp away to complete the removal 5 Locate the fuse drawer beneath the line voltage plug on the rear panel Pry open the drawer with a small flat bladed screwdriver Item 4 and remove the line fuse See Figure 6 3 6 Reinstallation Do in reverse steps 5 through 2 to reinstall the line fuse and then the line cord Power connector gt mn Fuse es Fuse drawer gt Figure 6 3 Line fuse removal TDS 340A TDS 360 amp TDS 380 Service Manual 6 9 Removal and Replacement Front Panel Knobs and Shafts Required tool a pair of angle tip tweezers Item 8 1 Set the oscilloscope so its bottom is down on the work surface and its front is f
27. amp TDS 380 Service Manual 6 29 Troubleshooting 6 30 4 Press the main menu button Loop Select one of the following options from the side menu m Press Once to run the tests once m Press Always to run the tests continuously until you cycle the power m Press Until Fail to run the tests continuously until the instrument fails a test or until you cycle the power 5 Press the main menu button Execute press the side menu button Ok Confirm Run Test 6 Wait The diagnostics will take about two minutes to complete Then the oscilloscope displays pass fail results for each system 7 Ifthe onboard diagnostics indicate a failure reenter the diagnostics menu and press the main menu button Error Log NOTE The RS232 Line Snapshot and RS232 Errors are reset at each power on For more RS 232 information refer to the TDS 340A TDS 360 amp TDS 380 Programmer Manual 8 Press the side menu button Display Log to display the diagnostics error log The error log contains summary data gathered over the life of the oscillo scope and descriptions of the last 200 errors encountered see Figure 6 17 The last error in the list is the most recent and or most important record this information and continue on to the 7roubleshooting Procedure in the next section to verify the failure and pinpoint the faulty module TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting Number of Powerups 6 System Errors 20
28. any adjustments Adjustment Interval These adjustments should be done once a year Table 5 1 lists the equipment you will need to do the adjustment procedures Table 5 1 Adjustment equipment Item number and description l Adjustment Tool 2 Termination 50 Q 3 Cable Precision Coaxial Minimum requirements 0 075 inch slot screwdriver Impedance 50 connectors female BNC input male BNC output 50 36 in male to male BNC Example Tektronix part number 003 1433 01 standard probe adjustment tool Tektronix part number 011 0049 01 Tektronix part number Purpose Monitor and attenuator adjust ments Timing calibration and attenua tor adjustment Attenuator adjustments and connectors 012 0482 00 system calibration 4 Generator Variable amplitude to 10 V Wavetek 9100 Calibration Voltage and external trigger DC Calibration accuracy to 0 05 System with Option 250 calibrations 5 Generator lt 10 Wavetek 9100 Calibration Timing calibration and attenua Fast rise Step amplitude lt 1 Vp p System with Option 250 tor adjustment TDS 340A TDS 360 amp TDS 380 Service Manual Adjustment Procedures The System Calibration Menu The oscilloscope has four onboard calibration routines You can access these routines through the system calibration menu Use the following procedure NOTE The Voltage Timing and External Trigger calibration routines are disabled at the
29. calibration menu 5 2 Figure 5 2 Timing compensation waveform 5 4 Figure 5 3 Attenuator adjustment setup and locations 5 5 Figure 5 4 Monitor adjustments 5 7 Figure 6 1 Oscilloscope orientation 6 6 Figure 6 2 Line cord 1 6 8 Figure 6 3 Line fuse removal 6 9 Figure 6 4 Knob and shaft removal eese 6 10 Figure 6 5 Rear cover cabinet and cabinet handle and feet removal ccc cece cece cece cece eee e hn 6 12 Figure 6 6 Removing the disk drive Lee 6 13 Figure 6 7 Trim ring menu elastomer and menu buttons removal 6 14 TDS 340A TDS 360 amp TDS 380 Service Manual iii Contents Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 6 16 Figure 6 17 Figure 6 18 Figure 6 8 EMI gasket removal and installation 6 16 Figure 6 9 Front panel assembly and menu flex circuit removal 6 17 Removing the floppy interface board 6 19 Removing the main board 6 20 Monitor assembly removal eese 6 22 Low voltage power supply removal 6 24 Option 14 assembly removal 6 26 Fan and fan mount removal
30. functional circuit block as shown in Figures NO TAG through 3 2 Input Signal Path signal enters the oscilloscope through a probe connected to a BNC on the All TDS 340A A12 TDS 360 or A13 TDS 380 Main Board Attenuators Circuitry in the attenuator selects the input coupling and attenuation factor The processor system controls the attenuators with a serial interface Probe Coding Interface The probe coding interface signals pass through the Main Board to the A6 Front Panel which senses them Acquisition System The acquisition system amplifies the input signals samples them converts them to digital signals and controls the acquisition process under direction of the processor system The acquisition system includes the trigger acquisition timing and acquisition mode generation and control circuitry TDS 340A TDS 360 amp TDS 380 Service Manual 3 1 Theory of Operation LV Power Supply A20 A9 Bezel Button Flex 10 Pins P1 v P3 A6 i 40 2 Pins FrontPanel 10 Pins J1 P1 13 Pins 2 35 4Pins CalSig 13 11 TDS 340A Main 12 TDS 360 A13 TDS 380 amp 5Pins Not Used sl P30 P603 603 ae A26 Monitor i 16 13Pins e 16 Pins gt 7 amp lt 16Pins f J901 702 gx 8Pins e 0 lt 10 Pins J53 ot J 605 A5
31. order steps 1 through 4 reversing the removal instructions in each substep TDS 340A TDS 360 amp TDS 380 Service Manual 6 31 Troubleshooting Cal jumper J 609 N d Main board Figure 6 18 Main board cal jumper Troubleshooting Procedure Figures 6 19 through 6 22 6 26 6 28 and 6 29 are troubleshooting procedure flowcharts Use them to verify module failures indicated by the onboard diagnostics or use them to troubleshoot an instrument failure not connected with the diagnostics Begin with Figure 6 19 NOTE Before performing the troubleshooting procedure remove the instrument cabinet see page 6 11 6 32 TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting Push the ON STBY button to the on position Disconnect power cord Check that all the cables coming from the Power Perform the Power Supply Supply module and the cabling troubleshooting procedure between the modules are securely Figure 6 26 attached Can you hear the fan whirling When the scope powers Perform the Front on do the front panel Panel Processor lights come on and then go troubleshooting procedure off a shorttime later Figure 6 21 Yes Is the display readable and stable No Perform the Monitor troubleshooting procedure Figure 6 22 Yes Does the scope respond correctiy when the front panel buttons are pushed Perform
32. pin 13 ON 40 991 V 4 137 V J 1 pin 13 STBY 4 272 V 41 406 V J2pin 1 413 80 V 115 75 V 3 pin 1 fan connected 410 20 V 413 80 V 3 pin 1 fan disconnected 413 80 V 15 75 V 4 pin 1 413 80 V 4115 75 V x J3to fan Top of instrument 4 to option 14 if used OD monitor O Front of gt instrument S board Bottom of instrument vy Figure 6 27 Power supply connector locations TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting Use this procedure to troubleshoot a power supply overload problem WARNING Turn the oscilloscope off before disconnecting a cable Disconnect 603 from the Main board m Replace the Front Panel on module No Disconnect 4 from the Main board Does supply Replace the Option module work No Disconnect 601 from the Main board Does supply work No Replace the Main board Figure 6 28 Power supply overload troubleshooting procedure Replace the Option module TDS 340A TDS 360 amp TDS 380 Service Manual 6 41 Troubleshooting Use this procedure to determine if a problem is caused by the Main board or the Option Module Connectthe printer power cable to the printer power connector Is connector P4 Secured to the power supply Is the voltage at the end ofthe connector 6 5
33. section Equipment Required One leveled sine wave generator Item 7 or 8 two precision 50 Q coaxial cables Item 2 one 50 Q termination Item 1 and one BNC T connector Item 4 Time Required Approximately 10 minutes Prerequisites See page 4 11 Procedure 1 Press SAVE RECALL SETUP Recall Factory Setup OK Confirm Factory Init Set the vertical SCALE to 500 mV div Set the horizontal SCALE to 10 ns div Press TRIGGER MENU Mode Normal Press ACQUIRE Mode Average 16 nm F Y N Connect one 50 cable to the output of the sine wave generator Attach a BNC T connector to the other end of the cable Connect a second 50 Q cable to the other side of the BNC T connector 7 Connect the BNC T connector to CH 1 connect the cable to the EXT TRIG input through a 50 Q termination as shown in Figure 4 9 Leveled Sine wave Digitizing oscilloscope generator Output AO Ay EXTTRIG 50 termination Figure 4 9 Hookup for trigger sensitivity check TDS 340A TDS 360 amp TDS 380 Service Manual Performance Tests Set the generator frequency to 100 MHz TDS 340A 200 MHz TDS 360 or 400 MHz TDS 380 Press MEASURE High Low Setup Min Max Press the main menu button Select Measurement Press the side menu button more until Amplitude appears in the side menu Press the side menu button Amplitude Press SET LEVEL TO 50
34. the Option 3P Printer Pack Option 14 Only Table 1 15 Nominal traits power distribution system Name Description 5 mm x 20 mm 3 15 T 250 V or 1 25 in x 0 25 in T 250 V Fuse Rating TDS 340A TDS 360 amp TDS 380 Service Manual 1 9 Specifications Table 1 16 Nominal traits mechanical characteristics Name Weight Standard Rackmount Description 7 0 kg 15 5 Ibs stand alone instrument 8 6 kg 19 lbs with front cover accessories and accessories pouch installed 12 9 kg 28 5 Ibs when packaged for domestic shipment 6 6 kg 14 5 105 plus weight of rackmount parts Option 1R 14 7 kg 32 5 Ibs when the oscilloscope is packaged for domestic shipment Rackmount conversion kit 4 5 kg 10 Ibs 7 5 kg 17 5 165 when kit is packaged for domestic shipment Overall Dimensions Standard Instrument Figure 1 1 Height 191 mm 7 5 in with feet and accessories pouch installed 165 mm 6 5 in withoutthe accessories pouch installed Width 362 mm 14 25 in with handle Depth 471 mm 18 55 in stand alone instrument 490 mm 19 28 in with front cover installed 564 mm 22 2 in with handle extended Rackmount Instrument Height 178 mm 7 in Width 483 mm 19 in Depth 472 mm 18 6 in without handles 517 mm 20 35 in including handles TDS 340A TDS 360 amp TDS 380 Service Manual Specifications 471 mm 18 55 in 321 2 mm 12 88 in
35. the menu label Pk PK appears in the side menu Press the side menu button Pk Pk 7 Setthe vertical SCALE to 10 mV div 8 Setthe generator output so the CHx Pk Pk readout equals 60 mV 9 Press SET LEVEL TO 50 as necessary to trigger the display 10 Increase the frequency of the generator output to 100 MHz TDS 340A 200 MHz TDS 360 or 400 MHz TDS 380 11 Set the horizontal SCALE to 5 ns div TDS 340A 2 5 ns div TDS 360 or 2 5 ns div TDS 380 12 Press SET LEVEL TO 50 as necessary to trigger the display 13 Check that the Pk Pk readout on screen as shown in Figure 4 7 is 2 42 5 mV Tek Run 300MS s Average Select Measurement First increase the reference frequency to the test frequency then decrease the horizontal scale Cht Pk Pk 45 53mV Positive Overshoot Negative Overshoot Amplitude 5ns Chi more 3 of 6 Ch1 M elect Remove Measrmnt for chi Measrmnt Oo o olio olios SISISIC O Second read the results from the readout of measurement Pk Pk Off etup Levels Gating High Loy Reference Min Max Figure 4 7 Measuring analog bandwidth TDS 340A TDS 360 amp TDS 380 Service Manual 4 15 Performance Tests 14 When finished checking set the horizontal SCALE back to the 10 us div setting and set the
36. the previous procedure Offset accuracy is verified by successful completion of the self tests and the DC voltage measurement accuracy in the previous procedure Equipment Required One leveled sine wave generator Item 7 or 8 one 50 Q precision cable Item 2 and one 50 Q termination Item 1 Time Required Approximately 20 minutes Prerequisites See page 4 11 Procedure 1 Connect through a 50 2 precision cable and a 50 termination the sine wave output of a leveled sine wave generator to CH 1 see Figure 4 6 Set the output of the generator to a reference frequency of 50 KHz NOTE If you are verifying a TDS 380 you need a leveled sine wave generator with a 400 MHz output frequency Refer to Sine Wave Generator Leveling Procedure on page 4 20 for information on obtaining a leveled output from an unleveled sine wave generator Leveled v sine wave Digitizing oscilloscope generator 50 Figure 4 6 Hookup for analog bandwidth check 1 Press SAVE RECALL SETUP Recall Factory Setup OK Confirm Factory Init 2 Setthe horizontal SCALE to 10 us div 3 Press TRIGGER MENU Coupling Noise Rej 4 Press ACQUIRE Mode Average 16 TDS 340A TDS 360 amp TDS 380 Service Manual Performance Tests 5 Press MEASURE High Low Setup Min Max 6 Press the main menu button Select Measurement Now press the side menu button more until
37. 000 SET 11 Push the Save To Selected File side menu button The oscilloscope writes the current settings out to the file TDS 340A TDS 360 amp TDS 380 Service Manual 4 9 Functional Test 4 10 12 13 14 15 16 17 18 19 Push the SAVE RECALL front panel button Push the Recall Factory Setup main menu button Push the OK Confirm Factory Init side menu button This restores the oscilloscope settings to those before you saved the settings Push the Recall Saved Setup main menu button Push the From File side menu button Turn the general purpose knob to select the file to which you saved the settings step 10 If you used a blank floppy disk this file is TEK00000 SET Push the Recall From Selected File side menu button The oscilloscope reads the current settings from the selected file and resets its settings The displayed signal should show a horizontal setting of 250 us and the trigger at 50 Disconnect the probe from the channel input and the PROBE terminal You are done running the file system functional test TDS 340A TDS 360 amp TDS 380 Service Manual EEE Performance Tests Prerequisites These procedures confirm that the oscilloscope functions within warranted limits The procedures are in three groupings Signal Acquisition System Checks Time Base System Checks and Trigger System Checks They check all the characteristics that appear in boldface type under Warranted Characte
38. 086 00 174 2598 00 348 1258 00 260 2539 00 672 1454 00 384 1689 00 020 2036 00 119 5677 01 101 0140 00 200 3232 01 334 9118 00 334 9119 00 334 9120 00 366 2164 00 367 0356 01 131 5965 00 276 0849 00 174 3135 00 212 0144 00 348 0659 00 211 0730 00 211 0866 00 105 1081 00 Serial No Effective Serial No Discont d Qty Name amp Description Pre CABINET SCOPE ALUMINUM BLUE SHLD GSKT ELEK 0 125 X 0 188 WIRE MESH REAR COVER ASSY W LABELS TDS 300 MARKER IDENT MKD REAR PWR SUPPLY WARNING MARKER IDENT OPTION TDS 300 CABLE ASSY PWR 3 18 AWG TAN 60 DEG 10A 125V CLAMP PWR CORD POLYMIDE SCR ASSEM WSHR 6 32 X 0 625 P NH STL T 15 TORX SCREW MACHINE M2 6 X 0 45MM PITCH X 4 0MM L PHILIPS FLEX CIRCUIT BEZEL BUTTON CA ASSY FRONT PANEL FLAT FLEX FLX 16 26 AWG SHLD GASKET ELE 2 LAYER 0 094 X 0 188 X 8 750 SWITCH SET ELASTOMERIC BEZEL CIRCUIT BD ASSY FRONT PANEL ASSEMBLY SHAFT EXTENDER ACETAL KNOB KIT MINIATURE SIZE DISK DRIVE FLOPPY 3 5 INCH 1 44MB HD TRIM DECORATIVE FRONT COVER FRONT ABS OPTIONAL ACCESSORY MARKER IDENT LABEL FRONT PANEL TDS340A MARKER IDENT LABEL FRONT PANEL TDS 360 MARKER DENT LABEL FRONT PANEL TDS380 PUSH BUTTON SMOKE TAN HANDLE CARRYING POLY CARBONATE LEXAN SMOKE TAN CONTACT ELEC ESD PROTECT STAINLESS STEEL ALLOY CORE EM EMI SUPPRESS RBN CA RECTANGULAR CABLE ASSY SP FLAT FLEX FLX 26 1MM 15 0 L SCREW TPG TC 8 16 X 0 562 L PLASTI
39. 1 Screwdriver handle Accepts Torx driver bits 2 T 15 Torx tip Torx driver bit for T 15 size screw heads 3 T 20 Torx tip Torx amp driver bit for T 20 size screw heads Used only for removal of the cabinet handle Flat bladed screwdriver Screwdriver for removing standard head screws Pozidriv screwdriver Screwdriver for removing Pozidriv amp screws Nut driver 5 16 inch Used for removing earth ground cables Nut driver 3 16 inch Used for removing GPIB connector shell and EMI gasket SI oy gt 8 Angle tip tweezers Used for knob and shaft removal 9 Slip J aw Pliers Used for removing the front feet from the cabinet TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Table 6 3 Tools required for module removal Cont Item no Description 10 Wooden Spudger Used for front EMI gasket removal 11 Front Cover This optional accessory protects the front of the oscilloscope when positioned face down in the removal procedures 12 Gloves lint free cloth Used for removing the menu elastomer and menu button flex circuit 13 Soldering Iron 15 watt Used for removal of some cables 14 Solder Wick 15 BNC Wrench Removing BNCs from the attenuator assembly Tektronix 003 1463 00 16 BNC Fixture Installing BNCs on the attenuator assembly Tektronix 003 1464 00 TDS 340A TDS 360 amp TDS 380 Service Manual 6 7 Removal and Replacement Line Fuse and Line Cord WARNING
40. 111B PASSIVE PROBES W ACCY ORDER BY DESC TDS360 ONLY 1 ACCY PKG 2 P6114B PASSIVE PROBES W ACCY ORDER BY DESC TDS380 ONLY 070 9459 00 1 ANUAL TECH USER ENGLISH TK2548 070945900 070 8690 01 1 ANUAL TECH USER XYZ OF OSCILLOSCOPE TK2548 070869001 10 10 TDS 340A TDS 360 amp TDS 380 Service Manual Mechanical Parts List Optional Accessories List Fig amp Index Number Tektronix Part Number 012 0991 00 012 0991 01 012 1241 00 012 1250 00 012 1298 00 012 1379 00 012 1380 00 16 0792 01 16 1154 00 16 1157 00 16 1158 01 16 1159 00 16 1166 00 063 1702 03 070 9442 00 070 9435 00 200 3232 00 0 0 0 0 0 0 Serial No Effective Serial No Discont d Qty amp Description OPTIONAL ACCESSORIES CABLE COMPOSITE IDC GPIB 2 METER CABLE GPIB LOW EMI 1 METER CABLE ASSY RS232 9 PIN FEM TO 25 PIN MALE MODEM CABLE CENTRONIC INTCON SHLD CMPST PARA CABLE ASSY RS232 9 PIN FEM TO 25 PIN MALE NULL ODEM 9FEET CABLE ASSY RS232 9 PIN FEM TO 9 PIN FEM NULL ODEM 76 INCH CABLE ASSY RS232 9 PIN FEM TO 25 PIN FEM NULL ODEM 76 INCH CASE CARRYING 24 5 X 16 5 X 11 5 HOOD ASSEMBLY CASE CARRYING 26 X 22 X 12 HARD TRANSFER CASE CARRYING SOFT PADDED OPTIONS POUCH POUCH amp PLATE GPS SIZE RACKMOUNT KIT TDS 300 SERIES 1 0 INTERFACES UPGRADE OPT 14 MANUAL TECH PROGRAMMER MANUAL TECH SERVICE COVER FRONT ABS SEE FIGURE 10 1 19 TDS 3
41. 3 Monitor Adjustments Press SET LEVEL TO 50 Adjust the pulse amplitude for a five division display Set the VOLTS DIV to 1 V Use an adjustment tool to adjust the CH 1 100X capacitor for the flattest response Press WAVEFORM OFF CH 2 and TRIGGER MENU in that order Press the main menu button SOURCE then press the side menu button Ch2 Move the coaxial cable to the CH 2 BNC input reinstalling the 50 termination Repeat steps 7 through 18 for channel 2 Reinstall the instrument cabinet There are no set performance requirements for the monitor You may use this procedure to change monitor parameters whenever the brightness contrast horizontal position or vertical position of the display is not to your liking Equipment Required One adjustment tool Item 1 1 Pi Re Ge oS 5 6 Remove the instrument cabinet as described in the removal procedure on page 6 11 Set the oscilloscope bottom down with its front facing toward you Turn on the oscilloscope and allow a 20 minute warm up period Press DISPLAY Press the main menu button Intensity Use the side menu to set overall intensity to 100 Text Grat to bright and Waveform to bright Locate the brightness potentiometer see Figure 5 4 Use an adjustment tool Item 1 to raise the brightness until the background of the screen turns green TDS 340A TDS 360 amp TDS 380 Service Manual Adjustment Procedures
42. 40A TDS 360 amp TDS 380 Service Manual Mfr Code 00779 00779 6D224 TK2193 TK2500 80009 80009 34416 80009 34416 80009 80009 80009 80009 80009 80009 Mfr Part Number 553577 3 553577 2 012 1241 00 CACC 3049 C294 9 012137900 012138000 2416BE11 016115400 ORDER BY DESC 016115801 016115900 016116600 063170203 070944200 070943500 ORDER BY DESC 10 11 Mechanical Parts List 10 12 TDS 340A TDS 360 amp TDS 380 Service Manual
43. 619 mV 50 mV 0 9 V 881 mV to 919 mV A at50 mV 286 mV to 314 mV 10 mV 5 0v 460 mV 54 6 mV to 465 4 mV 5 mV 0 1V 990 mV 982 mV to 998 mV 12 Set the generator to the level and polarity indicated in Table 4 2 for the 13 14 15 16 17 18 19 20 21 TDS 340A TDS 360 amp TDS 380 Service Manual vertical scale position and offset settings you have made The DC test level should appear on screen If it does not return the DC accuracy check has failed for the present vertical scale setting of the current channel Check that the readout for the measurement Mean readout on screen is within the limits listed for the present vertical scale and position offset gen erator settings Repeat steps 7 through 13 until you have checked all the vertical scale settings listed in Table 4 2 Record the measurements for each of the 50 mV settings Subtract the second 50 mV measurement from the first and compare the result to the A at 50 mV limits in Table 4 2 Press WAVEFORM OFF then press CH 2 Set the generator output to O V Move the test hookup to the CH 2 input Repeat steps 5 through 15 for channel 2 Set the generator output to O V Disconnect the cable at the CH 2 input connector 4 13 Performance Tests DC Gain Accuracy Offset Accuracy Check Analog Bandwidth 4 14 DC gain accuracy is verified by successful completion of the self tests and the DC voltage measurement accuracy in
44. 9439 00 The following options add to the services available with the standard warranty The standard warranty appears immediately following the title page in this manual m Option M2 Tektronix provides three years of warranty plus two years remedial service m Option M3 Tektronix provides three years of warranty plus two years remedial service and four oscilloscope calibrations m Option M8 Tektronix provides four calibrations and four performance verifications one of each in the second through the fifth years of service TDS 340A TDS 360 amp TDS 380 Service Manual Options Standard Accessories The standard accessories listed in Table 7 4 come with the TDS 340A TDS 360 and TDS 380 Refer to Table 7 3 for manual part numbers Table 7 4 Standard accessories Accessory Reference User Manual U S Power Cord Probes quantity two P 6109B 10X Passive TDS 340A Probes quantity two P6111B 10X Passive TDS 360 Probes quantity two P 6114B 10X Passive TDS 380 Optional Accessories You can order the optional accessories listed in Table 7 5 Table 7 5 Optional accessories Accessory Part number Scope Camera C 9 Option 4 includes Adapter Hood 016 1154 01 Oscilloscope Cart K212 Rackmount Kit for field conversion 016 1166 00 Soft Sided Carrying Case 016 1158 01 Carrying Case 016 0792 01 Deluxe Transit Case 016 1157 00 Front Cover 200 3232 02 Accessories Po
45. Code This indicates the code of the actual manufacturer of the part 8 Mfr Part Number This indicates the actual manufacturer s or vendor s part number Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 10 2 TDS 340A TDS 360 amp TDS 380 Service Manual Mechanical Parts List Mfr Code to Manufacturer Cross Index Manufacturers Cross Index Mfr Code 00779 06383 06915 0 9 9 0KB01 0KBZ5 1GM54 61058 61857 75915 80009 86928 TK1163 TK1943 TK2469 07416 0 ROS 0KB05 18565 2W733 50356 64411 TK1326 TK1908 TK1918 Manufacturer AMP INC PANDUIT CORP RICHCO GEROME MFG CO INC STAUFFER SUPPLY CO Q amp D PLASTICS INC ZYTEC CORP MATSUSHITA ELECTRIC CORP OF AMERICA SAN O INDUSTRIAL CORP LITTELFUSE INC TEKTRONIX INC SEASTROM MFG CO INC POLYCAST INC NEILSEN MANUFACTURING INC UNITREK CORPORATION NELSON NAME PLATE COMPANY TRIQUEST PRECISION PLASTICS NORTH STAR NAMEPLATE INC CHOMERICS INC BELDEN WIRE amp CABLE COMPANY TEAC AMERICA INC TECH ETCH INC NORTHWEST FOURSLIDE INC PLASTIC MOLDED PRODUCT INC SHIN ETSU POLYMER Address CUSTOMER SERVICE DEPT PO BOX 3608 17303 RIDGELAND AVE 5825 N TRIPP AVE P O BOX 804238 PO BOX 737 403 NORTH MAIN 810 SE SHERMAN 1812 16TH AVENUE PO BOX 487 7575 MARKET PLACE DR PANASONIC INDUSTRIAL CO DIV TWO PANASONIC WAY 91 3 COLIN DRIVE 800 E NORTHWEST HWY 14150 SW KAR
46. ECTRIC CO PARSONS MANUFACTURING CORP HARBOR ELECTRONICS COMPANY PHOTO amp SOUND COMPANY SOLECTEK ACCESSORIES CORP Address 72 VERONICA AVE UNIT 4 10156 TORINO VAICENTALLO 62 456 UNIT H 2682 W COYLE AVE DIV OF XEROX CORPORATION 14181 SW MILLIKAN WAY 7 INDUSTRIAL WAY 11866 SLATER AVE NE 1055 O BRIEN DRIVE 14500 5 BROADWAY 824 NW 18TH AVE 6370 NANCY RIDGE DRIVE UNIT 109 TDS 340A TDS 360 amp TDS 380 Service Manual City State Zip Code SOMERSET NJ 08873 ITALY ELK GROVE VILLAGE IL 60007 BEAVERTON OR 97005 SALEM NH 03079 KIRKLAND WA 98034 MENLO PARK CA 940251476 GARDENA CA 90248 PORTLAND OR 97209 2390 SAN DIEGO CA 92121 Mechanical Parts List Exploded Views Figures 10 1 and 10 2 on the following pages show the module level exploded views of the TDS 340A TDS 360 and TDS 380 oscilloscope The adjacent page is the list of components for that exploded view indexed by the numbers in the figure TDS 340A TDS 360 amp TDS 380 Service Manual 10 5 Mechanical Parts List Figure 10 1 Cabinet and front panel assembly TDS 340A TDS 360 amp TDS 380 Service Manual 10 6 Mechanical Parts List Replaceable Parts List Fig amp Index Number 10 1 1 21 22 23 24 25 26 27 28 29 Tektronix Part Number 390 1109 02 348 0764 04 200 3971 05 334 8324 00 334 8718 00 161 0230 01 343 1213 00 211 0691 00 211 0840 00 259 0
47. ERFACE 80009 679 3777 00 20 211 0712 00 1 SCR ASSEM WSHR 6 32 X 1 250 T 15 TORX 0 01 ORDER BY DESCR 21 671 3736 00 1 CIRCUIT BD ASSY MAIN BD TDS 340 80009 671 3736 00 671 3152 00 1 CIRCUIT BD ASSY MAIN BD TDS 360 80009 671 3752 00 671 3753 00 1 CIRCUIT BD ASSY MAIN BD TDS 380 80009 671 3753 00 22 441 2072 00 1 CHASSIS ASSY 80009 441 2072 00 23 344 0513 00 1 SHIELD GASKET EMI CLIP 0 4L 0 1W 0 074H SST 80009 344 0513 00 24 210 0457 00 1 NUT PL ASSEM WA 6 32 X 0 312 STL CD PL 0 01 ORDER BY DESCR TDS 340A TDS 360 amp TDS 380 Service Manual 10 9 Mechanical Parts List Figure 10 3 Accessories Replaceable Parts List Fig amp Index Tektronix Part Serial No Serial No Mir Number Number Effective Discontd Qty Name amp Description Code Mfr Part Number STANDARD ACCESSORIES 10 3 1 161 0104 05 1 CABLE ASSY PWR 3 18 AWG 240V 98 0 L TK1373 161 0104 05 OPTION A3 AUSTRALIAN 2 161 0104 06 1 CABLE ASSY PWR 3 X 0 75MM SQ 220V 98 0 L TK1373 ORDER BY DESC OPTION A1 EUROPEAN 3 161 0104 07 1 CABLE ASSY PWR 3 1 0 50 240 VOLT 2 5 M TK2541 ORDER BY DESC OPTION A2 UNITED KINGDOM 4 161 0104 08 1 CABLE ASSY PWR 3 18 AWG 98 L SVT GREY BLK 2W733 ORDER BY DESC OPTION A4 NORTH AMERICAN 5 161 0167 00 1 CABLE ASSY PWR 3 0 X 0 75 6A 240V 2 5M L 53109 ORDER BY DESC OPTION A5 SWITZERLAND 1 ACCY PKG 2 P6109B PASSIVE PROBES W ACCY ORDER BY DESC TDS340 ONLY 1 ACCY PKG 2 P6
48. L BRAUN DR PO BOX 500 456 SEASTROM STREET 9898 SW TIGARD ST 3501 PORTLAND RD NE 3000 LEWIS amp CLARK HWY SUITE2 3191CASITAS AVENUE 3000 LEWIS amp CLARK HWY PO BOX 66008 5750 NE MOORE COURT 77 DRAGON COURT 2200 US HWY 27 SOUTH PO BOX 1980 7133 TELEGRAPH RD PO BOX 750 100 RIGGENBACH ROAD 18500 SW TETON AVENUE 4336 S ADAMS 34135 7TH ST TDS 340A TDS 360 amp TDS 380 Service Manual The table titled Manufacturers Cross Index shows codes names and addresses of manufacturers or vendors of components listed in the parts list City State Zip Code HARRISBURG PA 17105 3608 TINLEY PARK IL 60477 3048 CHICAGO IL 60646 NEWBERG OR 97132 PORTLAND OR 97214 4657 FOREST GROVE OR 97116 0487 EDEN PRAIRIE MN 55344 SECAUCUS NJ 07094 HOLBROOK NY 11741 DES PLAINES IL 60016 3049 BEAVERTON OR 97077 0001 TWIN FALLS ID 83301 TIGARD OR 97223 SALEM OR 97303 VANCOUVER WA 98661 LOS ANGELES CA 90039 2410 VANCOUVER WA 98666 6008 HILLSBORO OR 97124 6474 WOBURN MA 01880 RICHMOND IN 47374 MONTEBELLO CA 90640 6537 FALL RIVER MA 02720 TUALATIN OR 97062 TACOMA WA 98409 UNION CITY CA 94587 10 3 Mechanical Parts List Manufacturers Cross Index Cont Mfr Code 53109 TK1373 TK2541 TK2548 1DM20 1 96 34416 6D224 TK2193 TK2500 10 4 Manufacturer FELLER U S CORPORATION PATELEC CEM AMERICOR ELECTRONICS LTD XEROX CORPORATION PARLEX CORP KAM EL
49. SY 7 INCH 480 X 640 PIXEL MONOCHROME 80009 640 0079 02 3 213 0882 00 22 SCREW TPG TR 6 32 X 0 437 PNH STL CDPL T 15 TORX 0 01 ORDER BY DESCR 4 426 2426 00 1 FRAME FAN MTG POLYCARBONATE TK1163 426 2426 00 5 119 1770 04 1 FAN DC TUBEAXIAL 12V 2 0W 49 5 CFM 40 DBA 7 5 LEAD 61058 PANAFLO W CONNECTOR 120MM X 120MM X 25 4MM FBP 12A12L 6 119 5029 02 1 POWER SUPPLY 44W 90 275VAC 97 440HZ 1GM54 22917399 7 159 0190 00 1 FUSE CARTRIDGE 5 X 20MM 3 15A 250V 50MS 61857 EQ 3 15A 159 0277 00 1 FUSE CARTRIDGE 5 X 20MM 3A 250V 5 SEC UL LIST CSA 75915 235003 8 407 4247 00 1 BRACKET ALUMINUM CABLE CLAMP 2 375 L 0J9P9 407 4247 00 9 407 4196 00 1 BRACKET STD ALUMINUM STANDARD TK1943 407 4196 00 407 4293 00 1 BRKT OPTION 14 0 050 AL ALLOY OPT 14 ONLY TK1943 407 4293 00 10 210 0056 00 2 WASHER LOCK 10 SPLIT 0 047 THK SI BRZ NP 86928 ORDER BY DESCR 11 213 1079 00 4 J ACKSCREW 4 40 X 0 250EXTTHD 4 40 X 0 120 IN 00779 745563 2 12 213 1061 00 2 JACKSCREW 6 32 X 0 320 00779 554043 3 13 672 3140 01 1 CKT BD SUBASSY OPTION 14 BD TDS300 SERIES 80009 672 3140 01 M 343 0549 00 1 STRAP TIEDOWN E 0 098 W X 4 0 L ZYTEL 06383 15 343 1585 00 1 CLAMP WIRE ROUTING CLAMP NYLON 06915 8 01 16 343 0775 00 1 CLAMP RIBBON CABLE CLAMP OPT 14 52152 a 17 348 0150 00 1 GROMMET PLASTIC DK GRAY U SHAPE 0 66 ID OKBZ5 18 129 1480 00 1 SPACING SUPPORT POST 0 710 06915 DLSP 3 18M 01 19 671 3777 00 1 SUBASSY FLOPPY DISK INT
50. Service Manual Tektronix TDS 340A TDS 360 amp TDS 380 Digital Real Time Oscilloscopes 070 9435 03 This document applies to firmware version 1 05 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 Copyright Tektronix Inc All rights reserved 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 Printed in the U S A Tektronix Inc P O Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three 3 years from the date of purchase from an authorized Tektronix distributor If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product Batteries are excluded from this warranty In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty perio
51. Side menu functions including the cursors The SELECT button switches control from cursor to cursor The ACQUIRE button calls up the acquisition menu The SAVE RECALL button calls up the save recall menu The CURSOR button calls up the cursor menu The DISPLAY button calls up the display menu 2 4 TDS 340A TDS 360 amp TDS 380 Service Manual Operating Information Display Map Trigger position T ii The waveform Indicates position of vertical bar record icon cursors in the waveform record The value entered with the general purpose knob When the general purpose The Status Readouts show knob is first assigned the trigger status and acquisition C n ANE E TA knob icon appears here status mode and sampling rate or number of acquisitions Cursor measurement n readouts Trigger level indicator Trigger point indicator Set to TTL H The side menu offers a choice of specific actions Channel ground m eben Haee indicator The Channel readout gt em gt shows the vertical scale of Slope 4 Rn ee DI orma ns Set to ECL Set to 50 The Trigger readout shows the trigger source and level and whether the oscilloscope is triggered on the rising or falling edge of the waveform all active channels qe Source i The main
52. TE SPCL HD TORX FOOT CABINET BLACK POLYURETHANE SCR ASSEM WSHR 6 32 X 0 375 PNH STL CDPL T 15 TORX SCREW PHIL M2 5X10 PHIL PNH BRZN ADAPTER FLOPPY DISK DRIVE BRACKET ADAPTER TDS 340A TDS 360 amp TDS 380 Service Manual Mfr Code 80009 18565 80009 07416 OKB05 2W733 TK1163 OKBO1 OKBO1 07416 TK2469 64411 TK1918 80009 TK1163 80009 50356 TK1163 TK1908 OKB05 0 05 0KB05 80009 80009 TK1326 1 96 1DM20 0 01 0J ROS 0KB01 0KB01 TK1163 Mfr Part Number 390 1109 02 ORDER BY DESCR 200 3971 05 334 8324 00 334 8718 00 ORDER BY DESCR ORDER BY DESCR ORDER BY DESCR 26C4MXPHY ORDER BY DESCR 174 2598 00 348 1258 00 260 2539 00 672 1454 00 ORDER BY DESCR 020 2036 00 FD 04HF 2300 ORDER BY DESCR ORDER BY DESCR 334 9118 00 334 9119 00 334 9120 00 366 2164 00 367 0356 01 131 5965 00 33 FR 335 X 8X 6 5 1 00MM 26 15 B ORDER BY DESCR ORDER BY DESCR ORDER BY DESCR 211 0866 00 105 1081 00 10 7 Mechanical Parts List Figure 10 2 CRT power supply and circuit boards TDS 340A TDS 360 amp TDS 380 Service Manual 10 8 Mechanical Parts List Replaceable Parts List nn Tektronix Part SerialNo Serial No Mfr Number Number Effective Discontd Qty amp Description Code Mfr Part Number 10 2 1 426 2436 01 1 FRAME CRT FLTR POLYCARBONATE BLACK CT750 80009 426 2436 01 2 640 0079 02 1 DISPLAY AS
53. V Hcp Formal GPIB Clear Interleaf Talk Listen F3 232 Spool Figure 2 1 A pop up menu 3 Push side menu button to select a subfunction 4 Use the General Purpose knob to change variable function or subfunction settings 5 Press the CLEAR MENU button to remove a menu from the screen TDS 340A TDS 360 amp TDS 380 Service Manual Operating Information CO VERTICAL Z POSITION O MATH Y O HEFT VERTICAL OREF 2 A CO Y SCALE WAVEFORM OFF PROBE 0 sem SI SD SAVE RECALL CURSOR DISPLAY ACQUIRE BM HORIZONTAL CO CO ME TRIGGER m 0 lt Position gt LEVEL HORIZONTAL TRIGGER MENU MENU lt scare gt TRIGD ire gt O READY FORCE TRIGGER 1 Press any of the front panel menu buttons Tektronix TDS 3 60 DIGITAL REAL ue OSCILLOSCOPE Tektronix TDS 360 ae OSCILLOSCOPE 2009 3 Select an item f Tom the side menu if displayed Figure 2 2 Using menus TDS 340A TDS 360 amp TDS 380 Service Manual IO OJ Oo oI ico 2 Selectan item from the main menu or use leftmost button to pop up selections f
54. V Secure the connector Yes Yes Connect a printer to the Centronics port Replace the 1 0 and the printer power source Setup the interface Utility 1 0 menu for Hcp P ort Centronics and Hcp Formatto match the printer Press the HARDCOPY button Is connector P60 secured to the Main board Does the printer print a copy of the Screen Secure the connectors Yes Does Connecta VGA compatible monitor Replace the 1 0 the printer print a No Replace the Main the the 1 0 interface VIDEO interface copy of the board connector Screen Is the display on the external monitor stable and legible Is connector P 703 secured to the connectors Main board Is the display on the external monitor stable and legible Yes Replace the 1 0 interface Yes No Replace the Main board Yes The 1 0 interface module is OK Figure 6 29 Option 14 1 0 interfaces troubleshooting procedure 6 42 TDS 340A TDS 360 amp TDS 380 Service Manual JE Repackaging Instructions If you ship the oscilloscope pack it in the original shipping carton and packing material If the original packing material is not available package the instrument as follows 1 Obtain a corrugated cardboard shipping carton with inside dimensions at least 15 cm 6 in taller wider and deeper than the oscilloscope The shipping carton must be c
55. a few times and listen for a relay clicking sound Does oscilloscope work Replace fuse Does fuse blow again No No No Do you hear the clicking Is the fuse blown Yes Yes Remove cable from J1onthelVPS module Yes The LVPS module is ok Is Does the oscilloscope power up and are the secondary voltages Table 6 4 ok there 1 N to 1 5V on pin 13 of Replace LVPS i the module Power off the oscilloscope and connector disconnect 2 from the LVPS module Power back on The LVPS module is ok Perform the FrontPanel P rocessor troubleshooting procedure Are the secondary voltages ok No Power off the oscilloscope and disconnect 4 from the LVPS module Power back on Yes Replace the Monitor module Disconnectthe power cord Disconnect 1 from the Are the secondary voltages ok Are the secondary voltages ok No LVPS module Reconnect power Yes Yes Replace the option module Perform the Power Supply Overload troubleshooting procedure Figure 6 28 Figure 6 26 Power supply troubleshooting procedure TDS 340A TDS 360 amp TDS 380 Service Manual 6 39 Troubleshooting 6 40 Table 6 4 Power supply secondary voltages Location see Figure 6 27 Minimum Maximum 1 2 8 38 V 8 82 V Jl pins 5 and 6 4 87 V 5 13 V 1 pin 10 8 82 V J1pin 11 5 13 V J1
56. acing you 2 Refer to Figure 6 4 Grasp the knob you want to remove and pull it straight out from the front panel slightly to create some clearance between the base of the knob and the front panel 3 Insert the tweezers between the knob and front panel and use them to remove the knob and its shaft Pull the shaft out of the knob to remove 4 Reinstallation a Toreinstall align the inside of the knob to the end of the shaft and push it in until it snaps b Insert the shaft of the assembled knob into its hole in the front panel assembly until it stops c Rotate the knob while lightly pushing inwards until the shaft slips into its receptacle Push all the way in to seat the knob assembly When reinstalling the knobs note there are two sizes Be sure to reinstall the proper size knob in the proper location Figure 6 4 Knob and shaft removal 6 10 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Rear Cover Cabinet and Cabinet Handle Required tool a screwdriver with a size T 15 Torx 9 tip Items 1 and 2 1 an om 9 Pull out on both of the hubs on the cabinet handle to unlock it for position ing While holding the hubs unlocked rotate the handle towards the bottom of the oscilloscope Set the oscilloscope so its face is down with its front cover on the work surface and its bottom facing you Reference Figure 6 5 on page 6 12 as you do the following steps
57. ce EXT 10 23 Press MEASURE Select Measrmnt Amplitude 24 Increase the generator amplitude until the amplitude measurement reads 1 5 V if you are checking a TDS 340A or TDS 360 Increase the generator amplitude until the amplitude measurement reads 4 0 V if you are checking a TDS 380 25 Repeat steps 14 and 15 for the external trigger 26 Disconnect the test hookup Trigger level accuracy is verified by the successful completion of the Self Tests and the DC voltage measurement accuracy procedure on page 4 11 This completes the performance verification procedure Sine Wave Generator Leveling Procedure 4 20 Some procedures in this manual require a sine wave generator to produce the necessary test signals If you do not have a leveled sine wave generator use the following procedure to level the output amplitude of your sine wave generator using a power meter Equipment Required Sine wave generator level meter and power sensor power splitter and one precision coaxial cable Time Required About 5 minutes Prerequisites See page 4 11 Procedure 1 Connect the equipment as shown in Figure 4 11 2 Setthe sine wave generator to a reference frequency of 50 kHz TDS 340A TDS 360 amp TDS 380 Service Manual Performance Tests 3 Adjust the sine wave generator amplitude to the required number of divisions as measured by the oscilloscope Note the reading on the level meter Change the sine wave ge
58. crew see text Figure 6 6 Removing the disk drive Remove Securing screws TDS 340A TDS 360 amp TDS 380 Service Manual 6 13 Removal and Replacement Trim Ring Menu Elastomer Menu Buttons and Front EMI Gaskets Required tool a wooden spudger Item 10 1 Setthe oscilloscope so its rear is down on the work surface and its bottom is facing you STOP DO NOT touch the carbon contact points on the menu elastomer installed in the trim ring Also do not touch the contacts on the menu button flex circuit exposed when you remove the trim ring You should wear clean cloth gloves that are free of lint when handling the menu elastomer or when touching the menu button flex circuit mounted on the front chassis 2 Grasp the trim ring by its top edge pry it up and lift it forward to snap it off the top front of the main chassis see Figure 6 7 Trim Ring To remove grasp its back edge and press up on its two tab locks Flex the trim ring upward then pull it forward Repeat for the bottom edge of the trim ring Tab lock lt gt 0040 Trim ring gt Menu buttons 17 Pd Figure 6 7 Trim ring menu elastomer and menu buttons removal 6 14 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement 3 Repeat the process prying on the bottom edge of the tr
59. d performance Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope TDS 340A TDS 360 amp TDS 380 Service Manual Maintenance Table 6 1 External inspection check list Item Inspect for Repair action Cabinet front panel and cover Cracks scratches deformations damaged Replace defective module hardware or gaskets Front panel knobs Missing damaged or loose knobs Repair or replace missing or defective knobs Connectors Broken shells cracked insulation and Replace defective modules Clear or wash out deformed contacts Dirt in connectors dirt Carrying handle and cabinet feet Correct operation Replace defective module Accessories Missing items or parts of items bent pins Replace damaged or missing items frayed broken or frayed cables and damaged cables and defective modules connectors Cleaning Procedure Exterior AS Inspection Interior A WARNING To avoid injury or death unplug the power cord from line voltage before cleaning the oscilloscope To avoid getting moisture inside the oscillo scope during external cleaning use only enough liquid to dampen the cloth or applicator 1 Remove loose dust on the outside of the oscilloscope with a lint free cloth 2 Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners 3 Clean the monitor screen with a lint f
60. d and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix shipping charges prepaid and with a copy of customer proof of purchase Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations Table of Contents General Safety Summary vii Service Safety xi Preface e eur eee E UL T VERMES xiii Specifications Warranted Characteristics 1 1 Typical Characteristics 0 0 t 1 5 Nominal Prats i eue een ok Set Ub a eek 1 7 Operating Information Display and Power 2 1 Vertical Controls 5 aa en A nn 2 2 Horizontal Controls x ELSE tee Ee E 2 2 Trigger Controls Rer ere ere v RR E 2 3 Inputs x 3 sine rex E Ee ERR ARA ee eR AR e ees 2 3 Miscellaneous Controls 2 4 Display Map oe eenn un Seen rx EU 2 5 Rear Panel Connectors 2 6 Using the Menu System
61. div 25 us div 10 ns TDS 340A 10 us div 5 ns div The greater of 10 ns or TDS 360 10 us div 2 5 ns div 02 x sec div setting TDS 380 10 us div 1 ns div TDS 340A TDS 360 amp TDS 380 Service Manual 1 1 Specifications Table 1 1 Warranted characteristics signal acquisition system Cont Name Accuracy Offset Description Volts Div setting Offset accuracy 0 4 x Net Offset 3 mV 0 1 div x V div setting 2 mV div 99 5 mV div 0 4 x Net Offset 30 mV 0 1 div x V div setting 100 mV div 995 mV div 0 4 x Net Offset 300 mV 0 1 div x V div setting 1 V div 10 V div Analog Bandwidth DC Coupled TDS 340A DC 2100 MHz TDS 360 DC 2200 MHz DC 2180 MHz for 2 mV div TDS 380 DC 2400 MHz DC 2250 MHz for 2 mV div Cross Talk Channel Isolation 2100 1 at50 MHz with equal Volts Div settings on each channel Input Impedance DC Coupled Input Voltage Maximum Lower Frequency Limit AC Coupled TDS 340A 1 MQ 1 in parallel with 20 pF 2 0 pF TDS 360 1 MQ 1 in parallel with 20 pF 2 0 pF TDS 380 1 MQ 1 in parallel with 12 pF 2 0 pF 300 V DC or AC CAT Il derate at 20 dB decade above 100 kHz to 13 V peak AC at 3 MHz and above lt 10 Hz 1 Net Offset Offset Position x Volts Div Net offset is the voltage level at the center of the A D converter dynamic range Offset Accuracy is the accuracy of this voltage level 2 Th
62. e AC Coupled Lower Frequency Limits are reduced by a factor of 10 when 10X passive probes are used Table 1 2 Warranted characteristics time base system Name Accuracy Long Term Sample Rate and Delay Time Accuracy Delta Time Measurements 2 Description 100 ppm over any gt 1 ms interval For single shot acquisitions using sample acquisition mode and a bandwidth limit setting of FULL 1 WI 100 ppm x Reading 0 6 ns For repetitive acquisitions using average acquisition mode with gt 16 averages and a bandwidth limit setting of FULL 1 WI 100 ppm x Reading 0 4 ns 1 For input signals gt 5 divisions in amplitude and a slew rate of gt 2 0 divisions ns at the delta time measurement points Signal must be acquired at a volts division setting gt 5 mV division 2 The WI waveform interval is the time between the samples in the waveform record Also see the footnotes for Sample Rate Range and Equivalent Time or Interpolated Waveform Rates in Table 1 11 on page 1 8 TDS 340A TDS 360 amp TDS 380 Service Manual Specifications Table 1 3 Warranted characteristics triggering system Name Description Accuracy Trigger Level DC Coupled Trigger source Sensitivity CH1 or CH2 3 of Setting Net Offset 0 2 div x volts div setting Offset Accuracy External 6 of Setting 20 mV External 10 6 of Setting 200 mV Sensitivity Edge Type Trigger DC Trigger source Sensitivity
63. e base system 1 2 Table 1 3 Warranted characteristics triggering system 1 3 Table 1 4 Power Requirements 1 3 Table 1 5 Warranted characteristics environmental 1 4 Table 1 6 Typical characteristics signal acquisition system 1 5 Table 1 7 Typical characteristics triggering system 1 6 Table 1 8 Typical characteristics probe compensator output 1 6 Table 1 9 Typical characteristics data handling 1 7 Table 1 10 Nominal traits signal acquisition system 1 7 Table 1 11 Nominal traits time base system 1 8 Table 1 12 Nominal traits triggering system 1 8 Table 1 13 Nominal traits display system 1 9 Table 1 14 Nominal traits Option 14 VO interface option TD3F14 Loc er E ar REAPER EE E 1 9 Table 1 15 Nominal traits power distribution system 1 9 Table 1 16 Nominal traits mechanical characteristics 1 10 Table 1 17 Certifications and compliances 1 12 Table 4 1 Test equipment 4 3 Table 4 2 DC accuracy 4 11 Table 5 1 Adjustment equipment 5 1 Table 6 1 External inspection check list 6 3 Table 6 2 Internal inspection checklist 6 4 Table 6
64. e characteristics and descriptions that apply to it Operating Information includes general information and operating instruc tions at the level needed to safely power on and service this oscilloscope Theory of Operation contains circuit descriptions that support general service and fault isolation down to the module level Performance Verification contains a collection of procedures for confirming that this digitizing oscilloscope functions properly and meets warranted limits Adjustment Procedures contains a collection of procedures for adjusting this digitizing oscilloscope to meet warranted limits Maintenance contains information and procedures for doing preventive and corrective maintenance of the digitizing oscilloscope Instructions for cleaning for module removal and installation and for fault isolation to a module are found here Options contains information on the factory installed options that may be present in your oscilloscope Electrical Parts List contains a statement referring you to the Mechanical Parts List where both electrical and mechanical modules are listed TDS 340A TDS 360 amp TDS 380 Service Manual xiii Preface Manual Conventions Modules Safety Symbols Related Manuals xiv m Diagrams contains a statement referring you to the Theory of Operation Chapter where module level block diagrams are listed m Mechanical Parts List includes a table of all replaceable modules their descr
65. e down on a soft nonabrasive surface to prevent scratching the face plate 9 Reinstallation perform steps 3 through 7 in reverse order to reinstall the monitor assembly TDS 340A TDS 360 amp TDS 380 Service Manual 6 21 Removal and Replacement g Monitor assembly EMI clip Monitor frame Figure 6 12 Monitor assembly removal 6 22 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Power Supply Assembly Required tool a screwdriver with a size T 15 Torx tip Items 1 and 2 1 Set the oscilloscope so its right side is down on the work surface with its bottom facing you Unplug the main board power cable Set the oscilloscope so its bottom is down on the work surface with its front facing to the right If Option 14 is installed and its printer power cable is used on your instrument unplug the printer power cable Unplug the monitor and fan power cables Remove the chassis ground connector by unbolting it from the main chassis Remove the two screws connecting the power supply assembly to the main chassis see Figure 6 13 Gently pull the power supply assembly up and out of the main chassis Reinstallation Perform steps 2 through 8 in reverse order reversing the removal instructions in each step to reinstall the assembly TDS 340A TDS 360 amp TDS 380 Service Manual 6 23 Removal and Replacement
66. e of test Equipment required Time required Prerequisites Procedure steps TDS 340A TDS 360 amp TDS 380 Service Manual 4 1 Performance Verification Pop Up Menu m Refer to Figure 4 1 Main menu refers to the menu that labels the seven menu buttons under the display Side menu refers to the menu that labels the five buttons to the right of the display Pop up menu refers to a menu that pops up when a main menu button is pressed m Where instructed to use a front panel button or knob select from a main or side menu or verify a readout or status message the name of the button or knob appears in boldface type Instructions for menu selection follow this format FRONT PANEL BUTTON Pop Up if necessary Main Menu Button Side Menu Button For example Push TRIGGER MENU Type Video Trig ger On Lines STOP This symbol denotes information you must read to do the procedure properly Tek Run 200kS s Sample Signal Path Compensation SPC corrects for DC inaccuracies caused by temperature variations and or long term drift SPC can be run any time after the oscilloscope is warmed up and should be run whenever the oscilloscope s ambient temperature has changed by more than 5 C or once a week if vertical settings of 5 mV div or less are used SPC will be adversely affected by input signals with AC components Disconnect or otherwise remove
67. ed Sine Wave Generator in place of the example equipment TDS 340A TDS 360 amp TDS 380 Service Manual 4 3 Performance Verification Test Record Photocopy this page and use it to record the performance test results for your instrument TDS 340A TDS 360 and TDS 380 test record Instrument Serial Number Certificate Number Temperature RH 96 Date of Calibration Technician Performance test Minimum Incoming Outgoing Maximum DC Voltage Measurement Accuracy CH1VOLTS DIV 1V 0 iei Lm 198 9 V 200 mV 8 52 V 50 mV 581mMV ae 619 mV 50 mV2 881 919 mV A at50 mV HB86mV 314 mV 10 mV 46m LLLLL 465 4 mV 5mv 982 MV 998 mV CH2 VOLTS DIV 1V FOMEI green AN 98 9 V 200 mV 39 28V 8 52 V 50 mV g mV 1 00 1 n 619 mV 50 mV 8g8a mV 919 mV Aat50 mV H86mV 314 mV 10 mV 46m LI 465 4 mV 5 mV 982 998 mV Analog bandwidth CH1 APN ee ee N A CH2 425mV 1 ________ N A Long term sample rate and delay time accuracy 20Div 00 22 32 0 Div Edge trigger sensitivity DC coupled Main Trigger stable trigger 1 1 1 N A Main Trigger Falling stable trigger 1 1 1 1 N A 1 Generator set at 0 6 V Generator set at 0 9 V 4 4 TDS 340A TDS 360 amp TDS 380 Service Manual Self Test This procedure uses internal routines to verify that the oscilloscope functions and passes its internal self tests and si
68. ed by the Front Panel module or the Main board Press the ON STBY button to the on position Is the ON STBY button working correctiy No Yes Do all the Front Panel LEDs turn on and then off a short time later No Yes Do the Front Panel controls operate correctly No Yes Front Panel Module is ok Is the bezel flex circuit securely installed in J 40 and is the flex circuit securely mounted on chassis No Securely install and or replace the bezel flex circuit Yes Do the Front Panel LEDs turn on atall Is there 5 V on pins 2 and 4 of J 30 No No Yes Yes Replace the Front Panel module No Securely install and or Replace the Front Panel Module Is the Front Panel cable securely installed at 30 and J 603 and is the cable ok replace the Front Panel cable Yes Replace the Main board Figure 6 21 Front panel processor troubleshooting procedure TDS 340A TDS 360 amp TDS 380 Service Manual Securely install and or replace the bezel flex circuit 6 35 Troubleshooting Use this procedure to troubleshoot display problems Is the display legible butthe horizontal and or vertical display not stable Yes Does pin 7 of J 901 have a signal with the same levels as Figure 6 23 Is pin 10 of J 901 at 15 V No Is pin
69. ement Communications cable Aw To option i Communications Chassis bottom Bottom of oscilloscope SES d Q Cd BN Figure 6 14 Option 14 assembly removal Video cable Power cable 6 26 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Fan and Fan Mount 1 Set the oscilloscope so its bottom is down with its rear facing you 2 Unplug the fan power cable from J3 on the Power Supply 3 Release the two flex locks securing the top of the fan to the fan mount then lift the fan out from the top of the chassis see Figure 6 15 Lift flex Fan mount Releasing the Fan Mount Lugs lt Left rear of scope y FY Move fan mount inward and lift Press flex locks Retainer lugs 4 Figure 6 15 Fan and fan mount removal TDS 340A TDS 360 amp TDS 380 Service Manual 6 27 Removal and Replacement STOP DO NOT proceed unless servicing a broken fan mount or removing that mount for cleaning 4 Rotate the oscilloscope so the side that houses the fan mount is facing upwards 5 Depress the two flex locks to release them see Figure 6 15 6 While holding the flex locks released slide the fan mount so its four retainer lugs slide from their small retainer holes in the chassis into their large release holes 7 Move the fan mou
70. ents for electrical equipment for measurement control and laboratory use l Tomaintain emission requirements when connecting to the 1 0 interface of this oscilloscope use only a high quality double shielded braid and foil cable The cable shield must have low impedance connections to both connector housings The VGA cable mustalso have a ferrite core at both ends Acceptable cables are listed in Table 7 6 on page 7 4 2 Performance criteria lt 0 3 division waveform displacement or lt 0 6 division increase in p p noise from 27 MHz to 500 MHz Test conditions both channel inputs terminated with grounding caps both channels set to 10 mV div both channels set to DC Coupling trigger source set to CH 1 acquisition mode set to Sample and time base set to 250 us div Underwriters Laboratories listing to Standard UL3111 1 for Electrical Measuring and Test Equipment 34 Canadian Standards Association certified to Standard CAN CSA C22 2 No 1010 1 92 3 3 These standards are North American interpretations of IEC 1010 Conditions for certification operating temperature 10 C to 55 C maximum operating altitude 2000 m Safety Class I IEC 1010 1 Annex Overvoltage Catagory Il IEC 1010 1 Annex Pollution Degree 2 IEC 1010 1 Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits CSA Certification includes the products and power cords appropriate for use in the North America power netwo
71. erage Check that the oscilloscope displays an actively acquiring waveform with the noise reduced Press WAVEFORM OFF to remove Channel 1 from the display Press CH 2 and move the probe to the CH 2 input Repeat steps 3 through 16 for Channel 2 Disconnect the probe from the channel input and the PROBE COMP terminal You are done running the oscilloscope functional test TDS 340A TDS 360 amp TDS 380 Service Manual Functional Test File System Functional Test Equipment Required One 720K or 1 44Mbyte 3 5 inch DOS compatible disk formatted Time Required Approximately 5 minutes Prerequisites None Procedure 1 Install the probe on CH 1 Connect the probe tip to PROBE COMP on the front panel leave the probe ground unconnected See Figure 4 4 Digitizing oscilloscope O O Figure 4 4 Hookup for file system functional test Insert the disk in the disk drive Push the SAVE RECALL front panel button Push the Recall Factory Setup main menu button Push the OK Confirm Factory Init side menu button Push the trigger SET LEVEL TO 50 front panel button Set the horizontal SCALE to 250 us Push the Save Current Setup main menu button we Mia mS UV ae C Push the To File side menu button m c Turn the general purpose knob to select the file to which to save the current TEK then containing five digits and a SET extension For example if you are using a blank disk the file name will be TEK00
72. ering 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 Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Tektronix part numbers contain two digits that show the revision level of the part For some parts in this manual you will find the letters XX in place of the revision level number Part Number Revision Level Revision Level May Show as XX A A 670 7918 03 670 7918 XX When you order parts Tektronix will provide you with the most current part for your product type serial number and modification if applicable At the time of your order Tektronix will determine the part number revision level needed for your product based on the information you provide TDS 340A TDS 360 amp TDS 380 Service Manual 10 1 Mechanical Parts List Module Servicing Modules can be serviced by selecting one of the following 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 modul
73. es and meet the same factory specifications For more information about the module exchange program call 1 800 TEK WIDE extension 6630 Module Repair and Return You may ship your module to us for repair after which we will return it to you New Modules You may purchase replacement modules in the same way as other replacement parts Using the Replaceable Parts List This section contains a list of the mechanical and or electrical components that are replaceable for the TDS 340A TDS 360 and TDS 380 Use this list to identify and order replacement parts The following table describes each column in the parts list Parts List Column Descriptions Column 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 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 1 Mfr
74. etthe horizontal SCALE to 1 ms div 6 Press HORIZONTAL MENU Trigger Position Set to 10 7 Adjustthe horizontal POSITION to move the trigger T to the right and on to the screen Continue to position the trigger T to align it to the center vertical graticule line 8 Press the main menu button Time Base then press the side menu button Delayed Only 9 Setthe horizontal SCALE of the D delayed time base to 1 ms div Then use the General Purpose knob to set delay time to 10 ms 10 Set the horizontal SCALE of the D delayed time base to 500 ns div NOTE When you change the SEC DIV in step 10 the delay time readout changes to 10 00001 or 9 99999 This is normal and has no effect on the verification 11 Check that the rising edge of the marker crosses the center horizontal graticule line at a point within 2 0 divisions of the graticule center NOTE One division of displacement from the center graticule corresponds to a 50 ppm time base error 12 Disconnect the test hookup Delta Time Measurement Delta time measurement accuracy is verified by successful completion of the Accuracy previous procedure TDS 340A TDS 360 amp TDS 380 Service Manual 4 17 Performance Tests Trigger System Checks Check Edge Trigger Sensitivity DC Coupled 4 18 These procedures check those characteristics that relate to the trigger system and are listed as checked under Warranted Characteristics in the Specifications
75. factory To enable the calibration menus refer to Enabling Calibration Menus on page 6 31 Equipment Required One DC calibration generator Item 4 one precision coaxial cable Item 3 one fast rise step generator Item 5 and one 50 2 termination Item 2 1 Press UTILITY 2 Press the leftmost main menu button until the pop up menu shows the Cal selection This calls up the system calibration menu shown in Figure 5 1 m N Tek Run 200kS s Sample Signal Path compensatio Signal Path Compensation SPC corrects for DC inaccuracies caused bv temperature variations and or long term drift SPC can be run any time after the oscilloscope is warmed up and should be run whenever the oscilloscope s ambient temperature has changed by more than 5 C or once a week if vertical settings of 5 mV div or less are used SPC will be adversely affected by input signals with AC components Disconnect or otherwise remove these signals prior to running SPC SPC will take approximately 4 minutes to run Config OK 1 O M250us Ch2 240mV Compensate Diag signal Paths Signal Voltage Timing External System Path Reference Pass Trigger Cal Pass Pass Pass Kae Fono ree ae CO CO CO S Figure 5 1 The system calibration menu 3 Remove all input signals from the front panel BNC connecto
76. generator output frequency back to 50 KHz 15 Press WAVEFORM OFF to remove Channel 1 from the display 16 Press CH 2 and move the hookup to the CH 2 input 17 Press TRIGGER MENU Source CH 2 18 Repeat steps 6 through 13 for CH 2 19 Disconnect the test hook up from the CH 2 input connector Time Base System Checks Check Long Term Sample 4 16 Rate and Delay Time Accuracy This procedure checks those characteristics that relate to the Main and Delayed time base system and are listed as checked under Warranted Characteristics in the Specifications section Equipment Required One time marker generator Item 9 one precision coaxial cable Item 2 and one 50 Q termination Item 1 Time Required Approximately 5 minutes Prerequisites See page 4 11 Procedure 1 Connect through a 50 Q precision coaxial cable and a 50 Q termination the time mark output of a time marker generator to CH 1 as shown in Figure 4 8 Set the output of the generator for 10 ms markers Time mark Digitizing oscilloscope generator Output 50 termination Figure 4 8 Hookup for sample rate check TDS 340A TDS 360 amp TDS 380 Service Manual Performance Tests 2 Press SAVE RECALL SETUP Recall Factory Setup OK Confirm Factory Init 3 Setthe vertical SCALE to 500 mV div 4 Press SET LEVEL TO 50 use the vertical POSITION knob to center the test signal on screen 5 S
77. gnal path compensations It also confirms that the oscilloscope was adjusted properly at the time it was last adjusted No test equipment or hookups are required Equipment Required None Time Required Approximately 5 minutes Prerequisites Power up the oscilloscope and allow a 20 minute warm up before doing this procedure Procedure 1 2 Press the front panel button UTILITY Press the main menu button System to select Diag Press the main menu button Execute and then press the side menu button OK Confirm Run Test The internal diagnostics verify proper oscilloscope function This verification takes about 30 seconds While it progresses a variety of test patterns flash on screen When finished status messages appear on the screen Check that the screen reports no failures If it reports a failure the oscillo scope has failed the self test Contact your Tektronix representative for assistance Press CLEAR MENU Press UTILITY and then press the main menu button System to select Cal Check that the word Pass appears in the main menu under the Voltage Reference Timing and Ext Trig menu labels See Figure 4 2 If any of the labels read Fail the oscilloscope has failed the self test Contact your Tektronix representative for assistance TDS 340A TDS 360 amp TDS 380 Service Manual 4 5 Self Test Tek Run 200kKkS s Sample Signal Path Compensatio signal Path Compensation SPC co
78. he trigger arrow is at the center graticule set the VOLTS DIV to 50 mV and set the SEC DIV to 250 ns This should result in a waveform similar to the one shown in Figure 5 2 TDS 340A TDS 360 amp TDS 380 Service Manual 5 3 Adjustment Procedures Attenuator Adjustment 54 Tek Run 200MS s Sample Recall Factory fai 50mv 250ns Chi 102mV OK Confirm Factory Init ave Reca Recall Current Saved Factory Setup Setup Setu Figure 5 2 Timing compensation waveform 18 Press UTILITY 19 Press the main menu button Timing Read the on screen text before continuing 20 Press the side menu button OK Compensate Timing Follow the instruc tions on the screen Use this procedure to adjust the low frequency compensation of the channel 1 and channel 2 attenuators You should perform this procedure if your oscillo scope demonstrates gross rounding or overshoot of square wave input signals or if your instrument fails one of the Performance Tests in the previous section Equipment Required One adjustment tool Item 1 one precision coaxial cable Item 3 one fast rise step generator Item 5 and one 50 termination Item 2 1 Remove the instrument cabinet as described in the removal procedure on page 6 11 2 Setthe oscilloscope on its left side with its front facing toward you 3 Power up the oscillo
79. ibly injuring you Wear protective clothing including safety glasses preferably a full face shield Avoid striking the display tube with or against any object To avoid damaging the monitor Store the monitor with its display tube face down in a protected location placing it on a soft nonabrasive surface to prevent scratching the face plate 2 Take the precautions outlined in the WARNING above Refer to Figure 6 12 while doing the following steps 3 Unplug the main board power supply cable 4 Remove the three T 15 Torx 9 screws securing the monitor assembly to the bottom of the main chassis Rotate the oscilloscope so its bottom is down on the work surface WARNING To avoid injury or death do not unplug the anode from the monitor when removing or replacing the monitor module 5 Remove the three T 15 Torx 9 screws securing the monitor assembly to the top of the chassis See Figure 6 12 to locate the screws 6 Push up on the left top tab lock on the trim ring and pull the left corner of the trim ring forward slightly 7 Tilt the rear of the monitor assembly upward slightly Slide the monitor assembly back in the main chassis until it stops about 2 cm Now lift it straight up out of the top of the main chassis to complete the removal 8 While heeding the WARNING on monitor handling that immediately precedes step 2 of this monitor removal procedure store the monitor assembly in a protected location Place it fac
80. ication The procedures in this section verify that the TDS 340A TDS 360 and TDS 380 oscilloscopes meet warranted specifications There are three performance tests that you can do m To rapidly confirm that this oscilloscope functions do the Self Test procedures that begin on page 4 5 Advantages This procedure is quick to do requires no external equipment or signal sources and performs extensive functional and accuracy testing to provide high confidence that the oscilloscope performs properly You can use it as a quick check before making a series of important measurements m To further check functionality do the Functional Test procedures that begin on page 4 7 Advantages These procedures require minimal additional time to perform require no additional equipment other than a standard accessory probe and more completely test the internal hardware of this oscilloscope You can use them to quickly determine if the oscilloscope is suitable for putting into service such as when it is first received m If you need a more extensive confirmation of performance do the Performance Tests that begin on page 4 11 after doing the functional and self tests Advantages These procedures check warranted specifications They require more time and suitable test equipment See Test Equipment on page 4 3 Conventions Throughout these procedures the following conventions apply m Each test procedure uses the following general format Titl
81. igitized Bits Number of 8 bits Input Channels Number of Two identical called CH 1 and CH 2 Input Coupling DC AC or GND Ranges Offset All Channels Range Position Range Sensitivity Rise Time 5 divisions 2 mV div to 10 V div TDS 340A 3 5 ns TDS 360 1 75 ns TDS 380 875 ps TekP robe Interface Level one probe coding 1 Displayed vertically with 25 digitization levels DLs per division and 10 24 divisions dynamic range with zoom off A DL is the smallest voltage level change that the 8 bit A D Converter can resolve with the input scaled to the volts division setting of the channel used Expressed as a voltage a DL is equal to 1 25 of a division times the volts division setting 2 The sensitivity ranges from 2 mV div to 10 V div in a 1 2 5 sequence of coarse settings Between consecutive coarse settings the sensitivity can be finely adjusted with a resolution of 1 of the more sensitive setting For example between 50 mV div and 100 mV div the volts division can be set with 0 5 mV resolution TDS 340A TDS 360 amp TDS 380 Service Manual 1 7 Specifications Table 1 11 Nominal traits time base system Name Range Sample R ate Range Seconds Division Range Time Base Delay Time Record Length Description TDS 340A 10 Samples s to 500 MSamples s in a 1 2 5 sequence TDS 360 10 Samples s to 1 GSamples s in a 1 2 5 sequence TDS 380 10 Samples s to 2 GSamples s in a 1 2 5 sequence TDS 340A
82. im ring to complete its removal Lay the trim ring on its face on the work surface 4 If you are servicing the front EMI gaskets discard the old ones 5 If you are servicing the menu elastomer lift it out of the trim ring 6 If you are servicing the menu buttons lift them out of the trim ring 7 Reinstallation a Insert each button into its hole in the trim ring b Align the menu elastomer over the menu button holes in the trim ring and press it in to install Avoid touching the carbon contact points on the elastomer when installing c Without installing the EMI gaskets align the trim ring to the front of the chassis and push it on to seat Be sure that both pairs of flex locks one pair each at the inside top and bottom of the trim ring snap over the edge of the chassis d Lay the oscilloscope so its front cover is on the work surface e Align an EMI gasket so it lies between any pair of adjacent flex locks along the groove between the cabinet f Using a wood spudger push the EMI gasket until it is firmly seated at the bottom of the groove see Figure 6 8 It should not overlap either flex lock g Repeatthe process just described to install the remaining three gaskets TDS 340A TDS 360 amp TDS 380 Service Manual 6 15 Removal and Replacement Spudger EMI gaskets 4 Figure 6 8 EMI gasket removal and installation Front Panel Assembly and Menu Flex Circuit Required tool a flat b
83. iptions and their Tektronix part numbers This manual uses certain conventions which you should become familiar with before doing service Throughout this manual any replaceable component assembly or part of this digitizing oscilloscope is referred to generically as a module In general a module is an assembly like a circuit board rather than a component like a resistor or an integrated circuit Sometimes a single component is a module for example the chassis of the oscilloscope is a module Symbols and terms related to safety appear in the General Safety Summary and Service Safety Summary found at the beginning of this manual Besides the symbols related to safety this manual uses the following symbols STOP This stop sign labels information which you must read in order to correctly do service and to avoid incorrectly using or applying service procedures These other manuals are available for the TDS 340A TDS 360 and TDS 380 Digitizing Oscilloscopes m The Reference Manual gives you a quick overview of how to operate your oscilloscope m The User Manual provides instructions on how to operate your oscilloscope m The Programmer Manual provides complete information on programming and remote control of the oscilloscope through the GPIB or RS 232 interface optional accessory TDS 340A TDS 360 amp TDS 380 Service Manual Specifications This appendix contains complete specifications for the TDS 340A TDS 360
84. it to undue pressure when removing or installing it When handling the CRT wear safety goggles and heavy gloves for protection 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 X Radiation To avoid x radiation exposure do not modify or otherwise alter the high voltage circuitry or the CRT enclosure X ray emissions generated within this product have been sufficiently shielded TDS 340A TDS 360 amp TDS 380 Service Manual xi Service Safety Summary Xii TDS 340A TDS 360 amp TDS 380 Service Manual Preface This service manual provides service information for the TDS 340A TDS 360 and TDS 380 Digitizing Oscilloscopes Manual Structure This manual is divided into Chapters such as Specifications and Theory of Operation Further it is divided into subsections such as Product Description and Removal and Installation Procedures Sections containing procedures also contain introductions to those procedures Be sure to read these introductions because they provide information needed to do the service correctly and efficiently The following is a brief description of each manual chapter Specifications contains a product description of the digitizing oscilloscope and tables of th
85. l Avoid Overvoltage To avoid electric shock or fire hazard do not apply potential to any terminal including the common terminal that varies from ground by more than the maximum rating for that terminal Avoid Electric Shock To avoid injury or loss of life 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 Do Not Operate Without Covers To avoid electric shock or fire hazard do not operate this product with covers or panels removed Use Proper Fuse To avoid fire hazard use only the fuse type and rating specified for this product Do Not Operate in Wet Damp Conditions To avoid electric shock do not operate this product in wet or damp conditions Do Not Operate in an Explosive Atmosphere To avoid injury or fire hazard do not operate this product in an explosive atmosphere Avoid Exposed Circuitry To avoid injury remove jewelry such as rings watches and other metallic objects Do not touch exposed connections and components when power is present Keep Probe Surface Clean and Dry To avoid electric shock and erroneous readings keep probe surface clean and dry TDS 340A TDS 360 a
86. laded screwdriver Item 4 1 Perform the previous procedure to remove the trim ring 2 Setthe oscilloscope so its bottom is down on the work surface and its front is facing you 3 Insert a flat bladed screwdriver into the slot at the front right of the chassis see Figure 6 9 Push inwards to release the snap lock at the right side 4 Liftthe front panel assembly out of the front of the main chassis until you can reach the interconnect cables connecting it to various other modules 5 Unplug the main board and menu flex circuit cables from their jacks on the front panel assembly 6 Finally lift the front panel assembly out of the front of the main chassis to complete the removal 6 16 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Menu flex circuit Press latch to release Front panel assembly Figure 6 9 Front panel assembly and menu flex circuit removal 7 Ifyou are removing the menu flex circuit pull the circuit away from the front of the main chassis 8 Reinstallation a Ifyou are replacing the menu flex circuit perform the following subparts m Wipe the front of the chassis using isopropyl alcohol and a clean lint free cloth Let it dry m Find the score line in the adhesive backing and peel the backing off the menu flex circuit TDS 340A TDS 360 amp TDS 380 Service Manual 6 17 Re
87. lof 2 on the LVPS module at 15V Yes Replace the Low Voltage Power S upply module Figure 6 22 Monitor troubleshooting procedure 6 36 Does pin 2 of J 901 have a signal similar to Figure 6 24 Power off the oscilloscope and disconnect cable from J 901 on the Monitor module Turn the power back on Does pin 5 of the cable have a signal similar to Figure 6 25 No Replace the Main board Yes Replace the Monitor module TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting Tek Run 5MS s sample CO O Ol o c M tous Chl 4 52V Figure 6 23 J901 7 signal a Tek Run 5MS s Average ISIS tous Chi 7 Ololololololoj Figure 6 24 J901 pin 2 signal TDS 340A TDS 360 amp TDS 380 Service Manual 6 37 Troubleshooting Tek Run 10kS 5 sample See Sms Chi 1 76V Figure 6 25 J901 5 signal 6 38 TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting Use this procedure to determine if a problem is caused by the Low Voltage Power Supply Press the ON STBY button
88. menu offers a The Time base readout shows the choice of major actions time base setting M indicates M ain time base D indicates D elayed time base When in video trigger mode the readout displays source and trigger feature Field 1 Field 2 or Lines TDS 340A TDS 360 amp TDS 380 Service Manual 2 5 Operating Information Rear Panel Connectors The Option 14 Panel Option 14 instruments only The power connector accepts line voltage allows access to three communications interfaces to power the instrument Refer to page 7 2 a Centronics parallel port an RS 232 interface for a list of power cord and connector and a GPIB interface It also includes a VGA options video compatible output port and a power connector for the optional TDS4F5P printer The fuse drawer holds the line fuse Refer to upgrade kit page 6 8 for fuse replacement procedures You can use the Centronics RS 232 and GPIB interfaces to transmit hardcopy data You can use the GPIB and RS 232 interfaces to operate and program the oscilloscope from a GP IB or RS 232 controller see the TDS 340A TDS 360 amp TDS 380 Programmer Manual for more information 2 6 TDS 340A TDS 360 amp TDS 380 Service Manual Operating Information Using the Menu System TDS 300 Series oscillosco
89. moval and Replacement m Carefully align the three holes on the menu flex circuit to the locator studs on the front of the main chassis When the alignment is correct press the flex circuit against the chassis so it adheres to the chassis m Clean the surface of the menu flex circuit using isopropyl alcohol and a clean lint free cloth b Reconnect the main board and menu flex circuit cables to the back of the front panel assembly c Carefully reinsert the front panel assembly into the main chassis left side first Main Board Assembly Required tools a screwdriver with a size T 15 Torx 9 tip Items 1 and 2 BNC wrench Item 15 BNC fixture Item 16 and soldering iron Item 13 1 Remove the front trim ring as described on page 6 14 2 Setthe oscilloscope so its top side is down on the work surface and its rear is facing you 3 Remove the floppy interface board shown in Figure 6 10 by removing the screw unclipping the standoff post from the board and gently rocking the board from side to side while lifting Make sure that you lift and rock from the connector end of the board 6 18 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Remove this SEW Floppy interface board N Unclip post from board Figure 6 10 Removing the floppy interface board 4 Unplug the power supply cable at the power supply 5 Unplug the monitor cable at the monitor assembly and power supply carefull
90. mp TDS 380 Service Manual vii General Safety Summary Product Damage Precautions Symbols and Terms A AN viii Wear Eye Protection To avoid eye injury wear eye protection if there is a possibility of exposure to high intensity rays Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified Provide Proper Ventilation To prevent product overheating provide proper ventilation Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Do Not Immerse in Liquids Clean the probe using only a damp cloth Refer to cleaning instructions 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 CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property 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 TDS 340A TDS 360 amp TDS 380 Service Manual General Safety Summary Symbols on the Product The following symbols may appear on the product A
91. n Acquire mode Sample Average Peak Detect Envelope Trigger position error 1 WI 2 ns 2 WI 2 ns Sensitivity Video Type Trigger Source Typical sensitivity CH1 or CH2 0 6 division of video sync signal External 75 mV of video sync signal External 10 750 mV of video sync signal Lowest Frequency for Successful Operation 50 Hz of Set Level to 50 Function Sensitivity Edge Type Trigger Not DC Coupled Trigger coupling Typical signal level for stable triggering AC Same as DC coupled limits4 for frequencies above 60 Hz Attenuates signals below 60 Hz Noise Reject Three and one half times the DC coupled limits 4 High Frequency Reject One and one half times times the DC coupled limits4 from DC to 30 kHz Attenuates signals above 30 kHz Low Frequency Reject One and one half times the DC coupled limits4 for frequencies above 80 kHz Attenuates signals below 80 kHz 1 The trigger position errors are typically less than the values given here These values are for triggering signals having a slew rate at the trigger point of 0 5 division ns 2 The waveform interval WI is the time between the samples in the waveform record Also see the footnote for the characteristics Sample Rate Range and Equivalent Time or Interpolated Waveform Rates in Table 1 11 on page 1 8 3 The minimum sensitivity for obtaining a stable trigger A stable trigger results in a uniform regular display t
92. nerator to the desired new frequency Input the correction factor for the new frequency into the level meter Jo Adjust the sine wave generator amplitude until the level meter again reads the value noted in step 4 The signal amplitude is now correctly set for the new frequency Sine wave Digitizing oscilloscope Level generator meter Input Output Power splitter EN Attenuators if necessary Power sensor gt Figure 4 11 Hookup for sine wave generator leveling TDS 340A TDS 360 amp TDS 380 Service Manual 4 21 Performance Tests 4 22 TDS 340A TDS 360 amp TDS 380 Service Manual EE Adjustment Procedures Equipment Required This section contains information you need to adjust the TDS 340A TDS 360 and TDS 380 There are only three types of adjustments you can perform on the oscilloscope the automated and semiautomated adjustments in the system calibration menu attenuator adjustments and monitor adjustments You should perform the signal path compensation adjustment after servicing your instrument or moving your instrument to a new operating environment 5 temperature change The other adjustment procedures may be necessary if the instrument fails one of the Performance Tests in the previous section You should allow the instrument a 20 minute warm up period before performing
93. nt inward so its retainer lugs are out of the large retainer holes and lift it out of the chassis to remove 8 Reinstallation a Perform in reverse order steps 5 through 7 reversing the removal instructions in each substep to reinstall the fan mount Be sure to seat the fan mount so its two flex locks snap to secure it on the chassis b Perform in reverse order steps 2 and 3 to reinstall the fan 6 28 TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting This section contains information and procedures designed to help you isolate faulty modules in the oscilloscope If you need to replace a module use the Removal and Replacement procedures immediately preceding this section Onboard Diagnostics The onboard diagnostics focus on verifying calibrating and isolating faulty modules Use the following procedure to activate the diagnostics 1 Power up the oscilloscope and allow a 20 minute warm up period 2 Press the front panel button UTILITY 3 Repeatedly press the main menu button System until Diag is highlighted in the pop up menu This calls up the diagnostics menu shown in Figure 6 16 Tek Run 200kS s Average Execution Control Remove all input signals 250 5 Chl s 254mV OK Confirm Run Test ICOICO COICOICO Lo System Execute Error Log iag Figure 6 16 The diagnostics menu TDS 340A TDS 360
94. onfirms that the oscilloscope functions properly NOTE This procedure verifies functions that is it verifies that oscilloscope features operate It does not verify that they operate within limits Therefore when the instructions that follow call for you to verify that a signal appears on screen that is about five divisions in amplitude or has a period of about six horizontal divisions do NOT interpret the quantities given as limits Operation within limits is checked in the performance tests which begin on page 4 11 DO NOT make changes to the front panel settings that are not called out in the procedure If you make changes to these settings other than those called out in the procedure you may obtain invalid results In this case just redo the procedure from step 1 Equipment Required One P6109B TDS 340A P6111B TDS 360 or P6114B TDS 380 probe Time Required Approximately 5 minutes Prerequisites None Procedure 1 Install the probe on CH 1 Connect the probe tip to PROBE COMP on the front panel leave the probe ground unconnected See Figure 4 3 Digitizing oscilloscope O eee Figure 4 3 Hookup for functional test 2 Press the front panel button SAVE RECALL the main menu button Recall Factory Setup and then the side menu button OK Confirm Factory Init TDS 340A TDS 360 amp TDS 380 Service Manual 4 7 Functional Test 48 10 11 12 13 14 15 16 17 18
95. onstructed of cardboard with 170 kg 375 pound test strength If you are shipping the oscilloscope to a Tektronix field office for repair attach a tag to the oscilloscope showing the instrument owner and address the name of the person to contact about the instrument the instrument type and the serial number Wrap the oscilloscope with polyethylene sheeting or equivalent material to protect the finish Cushion the oscilloscope in the shipping carton by tightly packing dunnage or urethane foam on all sides between the carton and the oscilloscope Allow 7 5 cm 3 in on all sides top and bottom Seal the shipping carton with shipping tape or an industrial stapler TDS 340A TDS 360 amp TDS 380 Service Manual 6 43 Repackaging Instructions 6 44 TDS 340A TDS 360 amp TDS 380 Service Manual Options Options Option 14 I O Interfaces This appendix describes the various options as well as the standard and optional accessories that are available for the TDS 340A TDS 360 and TDS 380 The available options are the Option 14 I O Interfaces Options A1 A5 interna tional power cords manual language options and warranty service options The following sections describe each of these options This option includes GPIB RS 232 and Centronics interfaces VGA video output and power for the DPU 411 printer It also includes the TDS 340A TDS 360 amp TDS 380 Programmer Manual You can connect a remote display to the VGA
96. output of a DC calibration generator through a dual banana connector followed by a 50 2 precision coaxial cable to CH 1 as shown in Figure 4 5 Digitizing oscilloscope DC calibrator Output Sense 3 9 Dual banana to BNC adapter Coaxial cable Figure 4 5 Hookup for DC voltage measurement accuracy check 3 Press SAVE RECALL SETUP Recall Factory Setup OK Confirm Factory Init 4 Press ACQUIRE Mode Average 16 5 Press MEASURE Select Measurement 6 Press the side menu button more until the menu label Mean appears in the side menu Press the side menu button Mean 7 Setthe vertical SCALE to one of the settings listed in Table 4 2 that you have not yet checked Start with the first setting listed 8 Press VERTICAL MENU Position 9 Turn the General Purpose Knob to set the vertical position to the setting listed in Table 4 2 The baseline level moves off screen 10 Press the main menu button Offset TDS 340A TDS 360 amp TDS 380 Service Manual Performance Tests 11 Use the General Purpose Knob to set vertical offset to the setting listed in Table 4 2 for the present vertical scale setting The baseline level remains off screen Table 4 2 DC accuracy Vertical scale Generator setting setting divs Offset setting setting Accuracy limits 1V 5 100 V 98 V 97 1V to 498 9 V 50 mV 0 6 V 581 mV to
97. pes use an intuitive user interface This interface reduces front panel clutter while allowing easy access to specialized functions through the menu structure The following procedure describes how to navigate in the menu structure If you are unfamiliar with this menu system you may want to run through the procedure several times to learn how you can access functions and subfunctions Figure 2 2 provides a graphic overview of using the menu system TDS 340A TDS 360 amp TDS 380 Service Manual 2 7 Operating Information 2 8 1 Push a front panel button to call up a menu of functions This first menu is the main menu Sometimes the main menu will be a side menu step 3 but most main menus are bottom menus 2 Push a main menu button to select a function One of three things happens If the function has subfunctions it becomes active If it is a variable function you can now use the General Purpose Knob to adjust it step 4 m If the function has subfunctions they appear on the side menu step 3 m The leftmost main menu button sometimes activates a pop up menu as shown in Figure 2 1 You can cycle through the pop up menu options by repeatedly pressing the button Each selection calls up different main and side menus ZZ Hardcopy Port Centronics m Config ca Dia Er D Hcp Layout System s Ens Portrait M250us Chi S 254m
98. ree cloth dampened with either isopro pyl alcohol or preferably a gentle general purpose detergent and water solution To access the inside of the oscilloscope for inspection and cleaning refer to the Removal and Replacement procedures in this section Inspect the internal portions of the oscilloscope for damage and wear using Table 6 2 as a guide You should repair defects immediately If you replace any electrical module perform the adjustment procedures beginning on page 5 1 CAUTION To prevent damage from electrical arcing ensure that circuit boards and components are dry before applying power to the oscilloscope TDS 340A TDS 360 amp TDS 380 Service Manual 6 3 Maintenance Table 6 2 Internal inspection check list Item Circuit boards Resistors Solder connections Capacitors Inspect for Loose broken or corroded solder connec tions Burned circuit boards Burned broken or cracked circuit run plating Burned cracked broken or blistered condition Cold solder or rosin joints Damaged or leaking cases Corroded solder on leads or terminals Repair action Remove the failed module and replace it with a new module Remove the module with the faulty resistor and replace it with a new module Resolder joint and clean with isopropyl alcohol Remove the module with the faulty capacitor and replace it with a new module from the factory Wiring and cables Loose plugs or connectors Bu
99. riggered on the selected slope The trigger point must not switch between opposite slopes on the waveform and the display must not roll across the screen on successive acquisitions The TRIG D LED stays constantly lighted when the SEC DIV setting is 2 ms or faster but may flash when the SEC DIV setting is 10 ms or slower Seethe characteristic Sensitivity Edge Type Trigger DC Coupled in Table 1 3 which begins on page 1 3 Table 1 8 Typical characteristics probe compensator output Name Output Voltage and Frequency Probe Compensator Description Characteristic Voltage 5 0 V low high into a 1 MO load Frequency 1 kHz TDS 340A TDS 360 amp TDS 380 Service Manual Specifications Table 1 9 Typical characteristics data handling Name Description Time Data Retention Nonvolatile 25 Years Memoryt 1 Thetime that reference waveforms stored setups and calibration constants are retained when there is no power to the oscilloscope Datais maintained by a lithium poly carbon monofluoride battery Nominal Traits Nominal traits are described using simple statements of fact such as Two identical for the trait Input Channels Number of rather than in terms of limits that are performance requirements Table 1 10 Nominal traits signal acquisition system Name Description Bandwidth S elections 20 MHz and FULL Digitizers Number of Two identical digitized simultaneously D
100. ristics on page 1 1 The tests in this subsection comprise an extensive valid confirmation of performance and functionality when the following requirements are met The cabinet must be installed W You must have performed and passed the procedures under Self Test on page 4 5 and those under Functional Test on page 4 7 m The oscilloscope must have been operating for a warm up period of at least 20 minutes and must be operating at an ambient temperature between 10 C and 455 C Signal Acquisition System Checks Check DC Voltage Measurement Accuracy A These procedures check signal acquisition system characteristics that are listed as checked under Warranted Characteristics in the Specifications section WARNING Performance of this procedure requires input voltages up to 98 VDC Contact with live circuits could cause injury or death Be sure to set the DC calibration generator to 0 volts before connecting disconnecting or moving the test hookup during the performance of this procedure TDS 340A TDS 360 amp TDS 380 Service Manual 4 11 Performance Tests 4 12 Equipment Required One dual banana connector Item 3 one DC calibration generator Item 6 and one precision coaxial cable Item 2 Time Required Approximately 35 minutes Prerequisites The oscilloscope must meet the prerequisites listed on page 4 11 Procedure 1 Setthe output of a DC calibration generator to 0 volts 2 Connect the
101. rk All other power cords supplied are approved for the country of use Category Examples of P roducts in this Category CAT Ill Distribution level mains fixed installation CAT II Local level mains appliances portable equipment CAT I Signal levels in special equipment or parts of equipment telecommu nications electronics Pollution Degree 2 Do not operate in environments where conductive pollutants may be present TDS 340A TDS 360 amp TDS 380 Service Manual Er 4 Operating Information This section identifies and describes each control and connector on the TDS 300 Series oscilloscope This chapter also describes how to use the oscilloscope menu system Refer to the TDS 340A TDS 360 amp TDS 380 User Manual for more information on setting up and taking measurements with the oscilloscope Display and Power Controls Tektronix TDS 360 ven nex nw oscutoscore DU The Side Menu buttons provide access to side menu selections Refer to page 2 7 for more information about the user interface Side Menu Cor The CLEAR MENU button clears all menus from the screen V E k The ON STBY button toggles The Main Menu buttons provide access to instrument power main menu selections Refer to page 2 7 for more information about the user interface Main Menu TDS 340A TDS 360 amp
102. rned broken or frayed wiring Firmly seat connectors R epair or replace modules with defective wires or cables Chassis Dents and deformations Straighten repair or replace chassis Cleaning Procedure Interior 6 4 STOP If after doing steps 1 and 2 a module is clean upon inspection skip the remaining steps 1 Blow off dust with dry low pressure deionized air approximately 9 psi 2 Remove any remaining dust with a lint free cloth dampened in isopropyl alcohol 75 solution and rinse with warm deionized water A cotton tipped applicator is useful for cleaning in narrow spaces and on circuit boards NOTE If steps 1 and 2 do not remove all the dust or dirt the oscilloscope may be spray washed using a solution of 75 isopropyl alcohol by doing steps 3 through 7 3 Gain access to the parts to be cleaned by removing easily accessible shields and panels see Removal and Replacement procedures 4 Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate 5 Use hot 120 Fto 140 F or 48 9 C to 60 C deionized water to thoroughly rinse them 6 Dry all parts with low pressure deionized air 7 Dry all components and assemblies in an oven or drying compartment using low temperature 125 F to 150 F or 51 7 C to 65 5 C circulating air TDS 340A TDS 360 amp TDS 380 Service Manual EEE
103. rom 10 us div to 1 ns div TDS 380 Accuracy DC Voltage Measurement Measurement type DC accuracy Sample Acquisition Mode Any Sample 2 0 x reading NetOffset Offset Accuracy 0 13 div 0 6 mV Delta Volts between any two samples 2 0 x reading 0 26 div 1 2 mV acquired underthe same setup and ambient conditions Frequency Limit Upper 20 MHz Band 20 MHz width Limited Step Response Settling Error Volts Div Step Settling error 96 setting amplitude 100 ns 20 ms am nam ov ao 100 mV div 995 mV div 02 1 Vidiv 10 V div lt 200V lt 25 02 Common Mode Rejection Ratio CMRR 100 1 at 60 Hz reducing to 20 1 at 50 MHz with equal Volts Div and Coupling settings on each channel Net Offset Offset Position x Volts Div Net Offset is the voltage level at the center of the A D converter dynamic range Offset Accuracy is the accuracy of this voltage level 1 The samples must be acquired under the same setup and ambient conditions The values given are the maximum absolute difference between the value at the end of a specified time interval after the mid level crossing of the step and the value one second after the mid level crossing of the step expressed as a percentage of the step amplitude TDS 340A TDS 360 amp TDS 380 Service Manual 1 5 Specifications Table 1 7 Typical characteristics triggering system Name Error Trigger Position Edge Triggering Descriptio
104. rom 15 kHz to 65 kHz such as NTSC PAL or SECAM Level one probe coding TDS 340A TDS 360 amp TDS 380 Service Manual Specifications Table 1 13 Nominal traits display system Name Description CRT Type 7 inch 17 95 cm diagonal magnetic deflection horizontal raster scan P 31 green phosphor Video Display Resolution 640 pixels horizontally by 480 pixels vertically Display area is 5 04 inch 12 92 cm horizontally by 3 78 inch 9 69 cm vertically Waveform Display Graticule A single graticule 401 x 501 pixels 8 x 10 divisions with divisions that are approximately 1cm by 1 cm Intensity Levels Dim and Bright with adjustable Overall Intensity and Contrast Table 1 14 Nominal traits I O interface option Name Description GPIB Part of Option 14 1 0 interface or TD3F 14A 1 0 interface field upgrade kit complies with IEEE Std 488 1987 RS 232 Part of Option 14 1 0 interface or TD3F 144A 1 0 interface field upgrade kit a 9 pin male DTE RS 232 interface that complies with EIA TIA 574 90 Centronics Part of Option 14 1 0 interface or TD3F 144A 1 0 interface field upgrade kit a 25 pin IBM PC type parallel printer interface that complies electrically with Centronics C332 44 RevA Video Signal Output DB 9 rear panel Video connector non interlaced with levels that comply with ANSI Option 14 Only RS343A VGA compatible ata 30 6 kHz sync rate Power Supply Printer Power supply connector to supply power to
105. rrects for DC inaccuracies caused by temperature variations and or long term drift SPC can be run any time after the oscilloscope is warmed up and should be run whenever the oscilloscope s ambient temperature has changed by more than 5 C or once a week if vertical settings of 5 mV div or less are used First display the Cal menu Second verify Pass SPC willNoe adversely affected by input signals status for the with AC Sompanerity Disconnect or otherwise i i remove thuse signals prior to running SPC adjustment Sections SPC will take approximately 4 minutes to run Third run a signal path compensation and verify status is Pass ln System Path cal Pass Config OK 1 O M250us Ch2 240mV Compensate Signal Paths Timing Pass E Figure 4 2 Verifying adjustments and signal path compensation 8 Press Signal Path and then press the side menu button OK Compensate Signal Paths When compensation completes the status message updates to Pass or Fail in the main menu 9 Check that the word Pass appears under Signal Path in the main menu See Figure 4 2 If Pass does not appear the oscilloscope has failed the performance verification return it to Tektronix for servicing 4 6 TDS 340A TDS 360 amp TDS 380 Service Manual E A Functional Test This procedure c
106. rs 4 Press the main menu button Voltage Reference Read the on screen text before continuing TDS 340A TDS 360 amp TDS 380 Service Manual Adjustment Procedures 10 11 12 13 14 15 16 17 Press the side menu button OK Calibrate Voltage Ref Connect a DC calibration generator Item 4 to the CH 1 input through a 50 Q coaxial cable Item 3 and follow the instructions on the screen Press UTILITY Press the main menu button Signal Path Read the on screen text before continuing Press the side menu button OK Compensate Signal Paths Wait The signal path compensation routine takes about four minutes to run Move the DC calibration generator Item 4 from the CH 1 input to the EXT TRIG input Press UTILITY Press the main menu button Ext Trig Read the on screen text before continuing Press the side menu button OK Calibrate External Trig Follow the instructions on the screen Disconnect the DC calibration generator and connect the 1 V fast rise output of a calibration generator to the CH 1 input through a 50 coaxial cable and a 50 Q termination Item 2 Set the calibration generator to output a 1 ms fast rise signal set the pulse amplitude to 50 Press SAVE RECALL SETUP Press the main menu button Recall Factory Setup then press the side menu button OK Confirm Factory Init Press AUTOSET Then adjust the vertical POSITION control to center the waveform on the screen so that t
107. s just before oscilloscope adjustment CAUTION Static discharge can damage any semiconductor component in this oscilloscope When performing any service which requires internal access to the oscilloscope adhere to the following precautions to avoid damaging internal modules and their components due to electrostatic discharge ESD 1 Minimize handling of static sensitive modules 2 Transport and store static sensitive modules in their static protected containers Label any package that contains static sensitive modules 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Do service of static sensitive modules only at a static free work station 4 Do not remove the oscilloscope cabinet unless you have met precaution number 3 above Consider all internal modules static sensitive 5 Nothing capable of generating or holding a static charge should be allowed on the work station surface 6 Handle circuit boards by the edges when possible 7 Do not slide the modules over any surface 8 Avoid handling modules in areas that have a floor or work surface covering capable of generating a static charge 9 Do not use high velocity compressed air when cleaning dust from modules TDS 340A TDS 360 amp TDS 380 Service Manual 6 1 Maintenance General Care The cabinet helps keep dust out of the oscilloscope and it is a major component of its cooling sys
108. scope and press SAVE RECALL SETUP TDS 340A TDS 360 amp TDS 380 Service Manual Adjustment Procedures 4 Press the main menu button Recall Factory Setup then press the side menu button OK Confirm Factory Init 5 Press CLEAR MENU 6 Connect the high output of a fast rise step generator Item 5 to the CH 1 BNC through a 50 coaxial cable Item 3 and a 50 termination Item 2 See Figure 5 3 7 Setthe calibration generator to output a high amplitude 1 kHz signal Set the pulse amplitude to 2596 8 Setthe oscilloscope VOLTS DIV to 200 mV the SEC DIV to 10 us and adjust the pulse amplitude for a five division display 9 Press SET LEVEL TO 50 10 Use the vertical POSITION control to place the top of the waveform near center screen 11 Set the VOLTS DIV to 100 mV 12 Use an adjustment tool Item 1 to adjust the CH 1 10X capacitor for the flattest response See Figure 5 3 13 Remove the 50 Q termination from the setup 14 Set the VOLTS DIV to 2 V View from bottom of instrument Digitizing oscilloscope 50 termination CH2 Fast rise step generator 10X adjustment 100X adjustment IN Output Front of instrument Figure 5 3 Attenuator adjustment setup and locations TDS 340A TDS 360 amp TDS 380 Service Manual 5 5 Adjustment Procedures 15 16 17 18 19 20 21 22 2
109. ss from the front of the cabinet Handle assembly Remove the internal screws and pull out handle hubs to remove and remove JR Lf Front foot Rotate HS aL ee 2 a Mounting screw Figure 6 5 Rear cover cabinet and cabinet handle and feet removal 6 12 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Disk Drive Required tools a screwdriver with a size T 15 Torx tip items 1 and 2 and a Pozidriv screwdriver item 5 1 Setthe oscilloscope so its bottom is down and its front is facing you 2 Toremove the disk drive perform the following steps using Figure 6 6 as a guide a Liftup on the two locking tabs on J1 of the disk drive b Remove cable J1 from the drive If present remove the T 15 Torx drive screw that clamps the drive in the chassis When replacing the drive do not reinstall this screw d Remove the one or two screws securing the drive to the chassis When replacing a drive without a spacer use one 4 0 mm screw e Push the drive from the back until it extends one to two inches beyond the front panel Then grasp the drive by its front edges and pull it out of the front panel to complete its removal f If present remove the screw securing the spacer to the drive and lift the spacer away from the drive to complete the removal 3 To reinstall the disk drive perform steps 2a 2f in reverse order Remove T 15 Torx drive s
110. tem It should normally be in place when operating the oscilloscope The optional oscilloscope front cover protects the front panel and display from dust and damage Install it when storing or transporting the oscilloscope Inspection and Cleaning Procedures A Inspection Exterior 6 2 Inspect and clean the oscilloscope as often as operating conditions require The collection of dirt on components inside can cause them to overheat and breakdown Dirt acts as an insulating blanket preventing efficient heat dissipation Dirt also provides an electrical conduction path that could cause an oscilloscope failure especially under high humidity conditions CAUTION Avoid the use of chemical cleaning agents that 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 Avoid the use of high pressure compressed air when cleaning dust from the interior of this instrument High pressure air can cause ESD Instead use low pressure compressed air about 9 psi Using Table 6 1 as a guide inspect the outside of the oscilloscope for damage wear and missing parts You should thoroughly check oscilloscopes that appear to have been dropped or otherwise abused to verify correct operation an
111. the Front Panel Processor troubleshooting procedure Figure 6 21 Yes Does the scope power on and pass all the diagnostics No Perform the Module Isolation troubleshooting procedure Figure 6 20 Yes Done Figure 6 19 Primary troubleshooting procedure TDS 340A TDS 360 amp TDS 380 Service Manual 6 33 Troubleshooting This procedure assumes that the oscilloscope is up and running and you can read the display Does the ErrorLog report any errors Select the extended diagnostics menu and run alltests Yes Check the last failure on the list Is itan ACQ CPU or DSP failure Yes Replace the Main board No Perform the Front Is ita front panel Panel Processor error troubleshooting procedure Figure 6 21 No Is The problem is most it an option likely the Option module error Replace module No Run all the extended diagnostics Does the display report any errors No Yes Are any failures The oscilloscope is reported ok Does the error still occur Yes Replace the Floppy Interface board No Done Does the error still occur S Replace the Main board No Done Figure 6 20 Module isolation troubleshooting procedure 6 34 TDS 340A TDS 360 amp TDS 380 Service Manual Troubleshooting Use this procedure to determine if a problem is caus
112. these signals prior to running SPC SPC will take approximately 4 minutes to run Config 1 0 M250us Ch2 240mV Compensate Signal Paths Voltage m External System Path Reference Trigger Cal Pass Pass Pass 7 eljejeijejejele Main Menu Figure 4 1 Menu locations TDS 340A TDS 360 amp TDS 380 Service Manual Performance Verification Test Equipment Table 4 1 Test equipment The performance test procedures require external traceable signal sources to check instrument performance If your test equipment does not meet the minimum requirements listed in Table 4 1 your test results will be invalid Item number and description Minimum requirements Example Purpose l Termination 50 Q Impedance 50 connectors Tektronix part number Checking delay between two required female BNC input male BNC 011 0049 01 channels output 2 Cable Precision Coaxial 500 91 cm 36 in male to Tektronix part number Signal interconnection two required male BNC connectors 012 0482 00 3 Connector Female BNC to dual banana Tektronix part number Several accuracy tests Dual Banana 103 0090 00 4 Connector Male BNC to dual female BNC Tektronix part number Checking trigger sensitivity BNC 103 0030 00 5 Coupler Female BNC to dual male BNC Tektronix part number Checking delay be
113. tween Dual Input 067 0525 02 channels 6 Generator DC Calibration Variable amplitude to 110 V Wavetek 9100 Calibration Checking DC offset gain and accuracy to 0 196 System with Option 250 and measurement accuracy Option 100 7 Generator 50 kHz to 250 MHz variable Wavetek 9100 Calibration Checking bandwidth and trigger Leveled Sine Wave amplitude from 5 mV to 4 Vp p System with Option 250 and sensitivity Medium F requency into 50 O Option 100 8 Generator 50 kHz to 400 MHz variable Rohde amp Schwarz SMY with Checking bandwidth and trigger Leveled Sine Wave amplitude from 5 mV to 4 Vp p URV 35 Power Meter and sensitivity High F requency into 50 Q NRV Z8 Power Sensor 9 Generator Time Mark Variable marker frequency from Wavetek 9100 Calibration Checking sample rate and 10 ms to 10 ns accuracy within System with Option 250 and delay time accuracy 2 ppm Option 100 10 Probe 10X included with this instrument A P6109B TDS 340A P6111B TDS 360 or P6114B TDS 380 probe Tektronix number P6109B TDS 340A P6111B TDS 360 or P6114B TDS 380 Signal interconnection 1 The high frequency leveled sine wave generator is only required to verify the TDS 380 not the TDS 340A or TDS 360 If you use the example equipment refer to Sine Wave Generator Leveling Procedure on page 4 20 for information on obtaining a leveled output from an unleveled sine wave generator If available you can use a Tektronix SG504 Level
114. uch 016 1159 00 1 0 Interface Field Upgrade Kit TD3F14A Docuwave waveform capture utility software for the PC S60 DWAV Printer bubble jet 360 dpi 83 cps plain paper HC 220 Printer portable thermal 112 mm paper DPU 411 Paper for DPU 411 printer package of five rolls 006 7580 00 Programmer Manual 070 9442 00 Service Manual 070 9435 00 TDS 340A TDS 360 amp TDS 380 Service Manual 7 3 Options Accessory Probes These are other types of probes you can use with the TDS 340A TDS 360 and TDS 380 You can order the following probes separately P6101B Passive Probe m P6129B Switchable 1X 10X Passive Probe not recommended for the TDS 360 or TDS 380 m P6408 TTL Logic Probe m P5100 High Voltage Probe m P5200 High Voltage Differential Probe m AM503S DC AC Current Probe System m P6561AS SMD Small Geometry Probe Accessory Cables Table 7 6 lists cables you can use with the TDS 340A TDS 360 and TDS 380 You can order them separately Table 7 6 Accessory cables Cable type Part number GPIB 1 meter 3 3 feet 012 0991 01 GPIB 2 meter 6 6 feet 012 0991 00 RS 232 9 pin female to 9 pin female connectors null 012 1379 00 modem 76 inch for AT style computers RS 232 9 pin female to 25 pin female connectors null 012 1380 00 modem 76 inch for PC style computers RS 232 9 pin female to 25 pin male connectors null 012 1298 00 modem 9 feet for serial interface printers RS 232
115. vnu WAVEFORM OFF O PROBE COMP FORCE TRIGGER 0 4 Adjust menu item values with general purpose knob sent CO C2 CO SAVE RECALL CURSOR DISPLAY ACQUIRE Cy CC W VERTICAL IB dil HORIZONTAL RS TRIGGER Z POSITION lt Position gt LEVEL ee OBER VERTICAL HORIZONTAL TRIGGER CO MENU MENU MENU eames C C E SCALE lt scare gt Tin TRIGD O READY Operating Information 2 10 TDS 340A TDS 360 amp TDS 380 Service Manual A Theory of Operation This section describes the electrical operation of the TDS 340A TDS 360 and TDS 380 to the module level Logic Conventions This manual refers to digital logic circuits with standard logic symbols and terms Unless otherwise stated all logic functions are described using the positive logic convention the more positive of the two logic levels is the high 1 state and the more negative level is the low 0 state Signal states may also be described as true meaning their active state or false meaning their non active state The specific voltages that constitute a high or low state vary among the electronic devices Active low signals are indicated by a tilde prefixed to the signal name RESET Signal names are considered to be either active high active low or to have both active high and active low states Module Overview This overview describes the basic operation of each
116. y route the cable out through its access hole 6 Unplug the front panel cable 7 Using Figure 6 11 as a guide remove the T 15 Torx mounting screws securing the main board assembly to the chassis 8 Liftthe main board assembly away from the oscilloscope to complete its removal TDS 340A TDS 360 amp TDS 380 Service Manual 6 19 Removal and Replacement Mounting screws 4 lt Floppy interface board Mounting screws 4 j Long mounting screw Figure 6 11 Removing the main board 9 Reinstalling the main board Perform in reverse order steps 8 through 1 reversing the removal instructions in each substep to reinstall the assembly communications cable make sure that you pull on the cable while tightening the interface board hold down screw Pulling the cable prevents it from getting pinched between the main processor board and the metal standoff post WARNING When reinstalling the floppy interface board with an Option 14 6 20 TDS 340A TDS 360 amp TDS 380 Service Manual Removal and Replacement Monitor Assembly AN Required tool a screwdriver with a size T 15 Torx tip Items 1 and 2 1 Setthe oscilloscope so its top is down on the work surface with its front facing you WARNING To avoid injury Use care when handling a monitor If you break its display tube it may implode scattering glass fragments with high velocity and poss

Service Manual TDS 340A, TDS 360 & TDS 380 Digital

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Service Manual TDS 340A, TDS 360 &amp; TDS 380 Digital

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Service Manual TDS 340A, TDS 360 & TDS 380 Digital