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TPS2000B Series Service Manual

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1. Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 31 260 2906 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL TPS 2CH COLOR 260 2907 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL TPS 4CH COLOR 32 202 0480 00 1 CASE FRONT 2 CHANNEL METALIZED SAFETY CONTROLLED 202 0481 00 CASE FRONT 4 CHANNEL METALIZED SAFETY CONTROLLED 33 348 1525 00 2 FOOT FRONT SANTOPRENE BLACK 64 DEROMETER TEXTURED 34 020 2917 00 1 REPLACEMENT KIT BNC SHELL 35 366 0862 00 6 ASSEMBLY KNOB 470 DIAMETER 36 366 0863 00 6 ASSEMBLY KNOB 685 DIAMETER 37 200 5136 00 1 COVER BNC DOOR 2 CHANNEL 200 5137 00 1 COVER BNC DOOR 4 CHANNEL 38 335 2232 00 1 MARKER IDENT 2 CH FRONT PANEL COLOR 335 2233 00 1 MARKER IDENT 4 CH FRONT PANEL COLOR 39 366 0845 00 1 PUSH BUTTON POWER PC ABS BAYBLEND FR110 SILVER 40 335 2227 00 1 MARKER IDENT BEZEL TPS2012B 100MHZ 335 2228 00 1 MARKER IDENT BEZEL TPS2014B 100MHZ 335 2229 00 1 MARKER IDENT BEZEL TPS2024B 200MHZ 8 4 TPS2000B Series Digital Storage Oscilloscopes Service Manual Table 8 2 Replaceable parts list cont Replaceable Parts Fig amp index Tektronix number part number Qty Name amp description 41 335 2328 00 1 LABEL 2 CH LANGUAGE FRENCH 335 2329 00 1 LABEL 2 CH LANGUAGE ITAL
2. Press menu button Select menu option Select setting DEFAULT SETUP Channel 1 Voltage Probe 1X 2 Connect the oscilloscope to the time mark generator as shown in the following figure Time mark Digitizing oscilloscope generator G GOGO O G O 00000 Output 2 api DEL DI 0000 50 O feedthrough BNC cable terminator Set the time mark generator period to 10 ms Set the oscilloscope VOLTS DIV to 500 mV div Set the oscilloscope Main SEC DIV to 1 ms div Press SET LEVEL TO 50 Use the vertical POSITION control to center the test signal on screen ea A m e Use the horizontal POSITION control to set the position to 10 00 ms 10 Set the oscilloscope SEC DIV to 250 ns div TPS2000B Series Digital Storage Oscilloscopes Service Manual 4 9 Performance Verification Check Edge Trigger Sensitivity 11 Check that the rising edge of the marker crosses the center horizontal graticule line within 2 divisions of center graticule NOTE One division of displacement from graticule center corresponds to a 25 ppm time base error 12 Disconnect the test setup This test checks the edge trigger sensitivity for all input channels 1 Set up the oscilloscope using the following steps Press menu button Select menu option Select setting DEFAULT SETUP Channel 1 Voltage Probe 1X TRIGGER Mode Normal ACQUIRE Sampl
3. Proceduresteps Signal Signal source setting Input Refer to Edge setup diagram 92 Sine Wave Generator 50 0 5 kHz 1 CH4 93 Sine Wave Generator 50 0 1 MHz 100 mV p 94 Sine Wave Generator 50 1 MHz 1 95 Sine Wave Generator 50 0 50 kHz 1 2 Vp 96 Sine Wave Generator 50 0 20 MHz 1 2 Vp p 97 Sine Wave Generator 50 BWL 30 mV 98 Sine Wave Generator 50 BWL 60 mV 99 Sine Wave Generator 50 0 BWL 120 mV 100 Sine Wave Generator 50 0 BWL 300 101 Sine Wave Generator 50 0 BWL 600 mV 102 Sine Wave Generator 50 0 BWL 1 2 Vp p 103 Sine Wave Generator 50 Q 5 kHz 2 5 Vp p 104 Sine Wave Generator 50 Q 1 MHz 2 5 Vp 105 Sine Wave Generator 50 0 50 kHz 2 5 Vp p 106 Sine Wave Generator 50 0 20 MHz 2 5 Vp p 107 Sine Wave Generator 50 Q BWL 2 5 Vo 108 Sine Wave Generator 50 0 BWL 5 Vp TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Maintenance This section contains the following information that is needed to perform periodic and corrective maintenance on TPS2000B Series oscilloscopes m Preparation tells you how to get ready to do oscilloscope maintenance B Preventing ESD provides general information on preventing damage to internal modules when doing maintenance m Inspection and Cleaning provides procedures for inspecting the oscilloscope and cleaning its external and internal modules Removal and I
4. Related 2 11 10 00 Probe LM sein Specifications Specifications en se ARANAN Signal Acquisition esee mene Time Base nenn aka Triggering System nenn eek E m External DC Input External 2 2 2 2 0 0 Mechanical Characteristics Environmental 2 1 Operating Information Operating Information 222 2 Theory of Operation Theory of Operation ee deed EE Tea Yea de ik ene eds Acquisition Board iiie et dee etr Be et d Power Supply and Battery Display Mole iii a a Front Pi rein Performance Verification Performance Verification 0 4 2 2 Required 0 1 Test Record ER un Selt Test oce ora Eee re e ERE AE T Er ODIUM Self mase EP ea RES Check DC Gain Accuracy Check DC Measurement Accuracy 4 4 TPS2000B Series Digital Storage Oscilloscopes Service
5. Temperature RH Date of Calibration Technician Test Passed Failed Self Test Oscilloscope tests Low limit Test result High limit Channel 1 5 mV div 33 6 mV 36 4 mV DC Gain Accuracy 200 mV div 1 358 V 1 442 V 2 Vidiv 13 58 V 14 42 V Channel 2 5 mV div 33 6 mV 36 4 mV DC Gain Accuracy 200 1 358 V 1 442 V 2 Vidiv 13 58 V 14 42 V Channel 3 5 mV div 33 6 mV 36 4 mV DC Gain Accuracy 200 1 358 V 1 442 V 2 Vidiv 13 58 V 14 42 V Channel 4 5 mV div 33 6 mV 36 4 mV DC Gain Accuracy 200 1 358 V 1442 V 2 Vidiv 13 58 V 14 42 V Channel 1 5 mV div Voos on Vertical Position 0 15 475 mV 19 525 mV Vertical Position 17 6 mV 31 3 mV 38 7 mV 200 mV div Vertical Position 0 658 mV 742 mV Vertical Position 704 mV 1 33 V 147 V 2 Vidiv Vertical Position 0 6 589 V 7 411 V Vertical Position 7 04 V 13 27 V 14 73 V 5 mV div Vreg Vertical Position 0 19 525 mV 15 475 mV Vertical Position 17 6 mV 38 7 V 31 3 V 200 mV div Vertical Position 0 742 mV 658 mV Vertical Position 704 mV 1 47 V 1 33 V 2 Vidiv Vertical Position 0 7411 6 589 V Vertical Position 7 04 V 14 73 V 13 27 V 4 2 TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance Verification Oscilloscope tests Low limit Test result High limit Channel 2 5 mV div Vos DC Measurement Vertical Positi
6. NOTE During some steps the oscilloscope may appear to be idle for several minutes while it is processing information internally You must wait for the screen prompt to continue NOTE In the following table BWL stands for the bandwidth limit of the particular oscilloscope The TPS2012B and TPS2014B models have a bandwidth limit of 100 MHz The TPS2024B has a bandwidth limit of 200 MHz 12 13 If the instrument fails any step in the procedure the procedure terminates Failure will result if an incorrect signal source is connected If this happens you must start the procedure over from the beginning If the instrument completes the procedure successfully a Pass message is displayed and the new adjustment takes effect Compensate the signal path by performing the self calibration routine Disconnect any probes or cables from the channel input connectors and then press the UTILITY button Select Do Self Cal to confirm that you are ready to proceed Disable the Service menu option by pushing the UTILITY front panel button and the Service and Service Mode Off option buttons TPS2000B Series Digital Storage Oscilloscopes Service Manual Adjustment Procedures The following table lists the steps in the procedure and the signal requirements Table 5 2 Adjustments steps 73 108 are for 4 CH models only Procedure steps Signal Signal source
7. 2 2 eme eme mesh messe seen nns 6 29 Diagrams Di grams AREE 7 1 Replaceable Parts Replaceable Parts cidade a aid ule ded a Ee eda Led oa ob MU M T deus 8 1 Parts Ordering Information ana nee rennen 8 1 Using the Replaceable Parts 1184 2 2 0 0 8 2 11 TPS2000B Series Digital Storage Oscilloscopes Service Manual List of Figures Figure 3 1 TPS2000B Series module level block diagram Remove CH3 and 4 for a 2 channel VERSION ERES 3 1 Figure 5 1 Adjustment 2 ee se messe e esses 5 3 Figure 6 1 Removing and installing the rear 2 6 8 Figure 6 2 Modules accessed from the rear of the 6 10 Figure 6 3 Using a screwdriver to remove the Acquisition board 6 12 Figure 6 4 Removing the BNC cover shell and retaining 8 6 14 Figure 6 5 Removing the front 2 6 15 Figure 6 6 Removing the Front Panel 2 07 70 6 16 Figure 6 7 Removing the Display 2 6 17 Figure 6 8 Removing and installing the keypad 2 6 19 Figure 6 9 Oscilloscope trouble
8. iii REI ia 5 1 Adjustments steps 73 108 are for 4 CH models 2 2 5 5 Internal inspection 56 2 2 2 22 6 3 List of error codes iaia 6 25 Parts list column descriptions 2 2 2 8 2 R placeable parts sti kenn 8 3 TPS2000B Series Digital Storage Oscilloscopes Service Manual General Safety Summary General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures While using this product you may need to access other parts of a larger system Read the safety sections of the other component manuals for warnings and cautions related to operating the system To Avoid Fire or Personal Use proper power cord Use only the power cord specified for this product and Injury certified for the country of use Connect and disconnect properly Do not connect or disconnect probes or test leads while they are connected to a voltage source Connect and disconnect properly Connect the probe output to the measurement instrument before connecting the probe to the circuit under test Connect the probe reference lead to the circuit under test before connecting the prob
9. Channel Channel Common Mode Rejection Ratio typical Channel to Channel Crosstalk 100 1 at 60 Hz reducing to 10 1 with 50 MHz sine wave with equal volts div and coupling settings on each channel With the same signal applied to each channel this is the ratio of the acquired signal amplitude to the amplitude of the MATH difference waveform CH1 CH2 CH2 CH1 CH3 CH4 or CH4 CH3 TPS2012B and TPS2014B TPS2024B 50 MHz 2100 1 100 MHz 2100 1 Measured on one channel with test signal applied between signal and common of the other channel and with the same VOLTS DIV and coupling settings on each channel Waveform acquisition Rate typical Up to 180 waveforms per second per channel Sample acquisition mode no measurements 1 The maximum peak to peak voltage that can be displayed is 40 V with 1x attenuation Time Base System Table 1 2 Time base system Characteristic Description Sample Rate Range TPS2012B and TPS2014B TPS2024B 5 S s to 1 GS s 5 S s to 2 GS s Waveform Interpolation sin x x Waveform interpolation is activated for sweep speeds of 100 ns div and faster Record Length 2500 samples for each channel Seconds Division Range TPS2012B and TPS2014B TPS2024B 5 ns div to 50 s div 1 2 5 5 sequence 2 5 ns div to 50 s div in a 1 2 5 5 sequence Sample Rate and Delay Time Accuracy 50 ppm over any 21 ms time interval TPS2000B Series Digital St
10. for proper channel Sine wave generator setup Edge setup Two Channel Four Channel Leveled sine Digitizing oscilloscope Square wave Digitizing oscilloscope wave generator generator Goooo Se Se G ci mE mm S ODO a 00000 O Output Pei Output S007 IAOOOO BNC cable BNC cable Figure 5 1 Adjustment setups TPS2000B Series Digital Storage Oscilloscopes Service Manual 5 3 Adjustment Procedures 5 4 Adjustment Procedure Use this procedure to load new calibration constants 1 Um des m 10 11 Enable the Service menu See page 5 2 Enable the Service Menu Push the Service option button Push the Factory Cal option button Push the Warmup Timer option button Push the Start Timer option button to ensure a 10 minute warm up After 10 minutes passes the oscilloscope displays a large black or green cross Press the front panel UTILITY button and push the Service option button Push the Factory Cal option button Push the FCAL INIT option button to initiate the factory calibration routine You are now in step of the procedure As indicated by Step 1 in the following table connect a 0 0 Vpc source to the channel inputs Press FCAL STEP to load the calibration constant for step 1 Follow the screen prompts and the table for the remainder of the routine applying the proper signal for each step
11. 1 Exploded view diagram Figure 8 TPS2000B Series Digital Storage Oscilloscopes Service Manual 8 6
12. Accuracy T Vertical Position 217 6 mV 31 3 mV 38 7 mV 200 mV div Vertical Position 0 658 mV 742 mV Vertical Position 704 mV 1 33 V 1 47V 2 Vidiv Vertical Position 0 6 589 V 7 411 V Vertical Position 7 04 V 13 27 V 14 73 V 5 mV div Vneg Vertical Position 0 19 525 mV 15 475 mV Vertical Position 17 6 mV 38 7 V 31 3 V 200 mV div Vertical Position 0 742 mV 658 mV Vertical Position 704 mV 1 47 1 33 V 2 Vidiv Vertical Position 0 7 411 V 6 589 V Vertical Position 7 04 V 14 73 V 13 27 V Channel 1 Bandwidth 2 12 V Channel 2 Bandwidth 2 12 V E Channel 3 Bandwidth 1 2 12 V Channel 4 Bandwidth 2 12 V Sample Rate and Delay Time Accuracy 2 divs 2 divs Channel 1 Edge Trigger Sensitivity Stable trigger Channel 2 Edge Trigger Sensitivity Stable trigger Channel 3 Edge Trigger Sensitivity 1 Stable trigger E Channel 4 Edge Trigger Sensitivity Stable trigger External Edge Trigger Sensitivity Stable trigger 1 Channels 3 and 4 are only on four channel oscilloscopes 4 4 TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance Verification Performance Verification Procedures Before beginning these procedures two conditions must be met The oscilloscope must have been operating continuously for twenty minutes within the operating temperature range specified in the environmental specifications See Table 1 9 on page 1 9 You must perform the following Self Calibrati
13. Keep the electrical contacts on the back of the switch pad clean Skin oils and dust will inhibit good electrical contact 3 Verify that all buttons are properly seated into place before proceeding 4 Place the entire internal assembly into the front case TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 19 Maintenance Troubleshooting This section contains information and procedures to help you isolate a defective module in the oscilloscope AN WARNING Before you perform this or any other procedure in this manual read the General Safety Summary and Service Safety Summary found at the beginning of this manual Also to prevent possible injury or damage to electrical components read Preventing ESD See page 6 1 Adjustment After Repair If you replace the acquisition circuit board you must adjust the oscilloscope after repair Refer to the Adjustment Procedures See page 5 1 Required Tools and You may need the following tools and equipment to troubleshoot the oscilloscope Equipment Tools and equipment Example Oscilloscope with probes Tektronix TDS1000 Series or TDS2000 Series with probes DMM 3 5 or greater digit DMM 6 20 TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Troubleshooting Tree isolate a problem to a specific troubleshooting procedure use the troubleshooting tree in the following four figures Turn on power Does screen lighten A
14. Replace Acquisition board Figure 6 10 Oscilloscope troubleshooting tree page 2 of 4 6 22 TPS2000B Series Digital Storage Oscilloscopes Service Manual From troubleshooting A tree page 1 B From troubleshooting tree page 1 Power cord Attach power attached cord Open case Verify IO board To troubleshooting voltages tree page 2 Attach backlight cable Connect external good Display Adapter board IO board and display to Main voltage correct board and IO board Is Replace Main board display correct Replace Display Adapter board Remove the Display Adapter board and use it with an external display module Is display correct Replace Display Reinstall case Replace IO board gt module Figure 6 11 Oscilloscope troubleshooting tree page 3 of 4 TPS2000B Series Digital Storage Oscilloscopes Service Manual 0447 008 Maintenance Maintenance From troubleshooting irat Battery charging tree page 2 problem Verify memory Replace E function with CF Acquisition xchange card board board Instrument no problem Replace Compact Flash board Memory function Problem fixed Replace Acquisition board Figure 6 12 Oscilloscope troubleshooting tree page 4 of 4 6 24 TPS2000B Series Digital Storage Oscilloscopes Service Manual PROBE COMP Output Using the Error Log Maintenance When the osc
15. typical 1 kHz TPS2000B Series Digital Storage Oscilloscopes Service Manual Mechanical Characteristics Table 1 8 Mechanical characteristics Characteristic Description Specifications Weight approximate Instrument only 2 7 kg 6 0 lbs 1 battery installed 3 2 kg 7 0 lbs 2 batteries installed 3 7 kg 8 0 lbs Dimensions without Height 161 mm 6 33 in front protective cover Width 336 mm 13 24 in Depth 130 mm 5 1 in Dimensions with front Height 164 mm 6 45 in protective cover Width 347 mm 13 65 in Depth 135 mm 5 3 in Cooling method Temperature controlled fan Intake vents on the bottom exhaust on the right side Environmental Performance Table 1 9 Environmental performance Characteristic Description Temperature Operating Nonoperating 1 0 C to 50 C 32 F to 122 F 40 C to 71 C 40 F to 159 8 F with 5 C minute with 5 C minute maximum gradient maximum gradient noncondensing up to 3000 altitude Humidity Operating 2 Nonoperating 2 5 to 90 relative humidity RH at up 5 to 90 relative humidity RH at up to 30 C to 30 C 86 F 86 F 3 5 to 60 relative humidity RH at up 5 to 60 relative humidity RH between 30 C to 50 C 122 F 86 F and 71 C 160 F noncondensing 3 Altitude Operating and 3 000 m 10 000 ft Nonoperating Altitude is limited by possible damage to
16. The trigger point must not switch between opposite slopes on the waveform and the display must not roll across the screen on successive acquisitions Trigger Frequency Readout typically stabilizes at 25 more signal than generates a stable visual display At 5 mV div 50 additional signal is typically required Coupling Sensitivity AC Same as DC coupled limits from 50 Hz and above NOISE REJ Reduces the DC coupled trigger sensitivity by 2 times for greater than 10 mv div to 5 V div HF REJ Same as the DC coupled limit from DC to 7 kHz attenuates signals above 80 kHz LF REJ Same as the DC coupled limits for frequencies above 300 kHz attenuates signals below 300 kHz SET LEVEL TO 50 typical Operates with input signals equal to or greater than 50 Hz Using a 10 M probe will not affect the operation of this function Trigger Level Range Source Range CH1 CH2 CH3 2 8 divisions from center of screen CH42 EXT 4 V EXT 5 20 V EXT 10 35 V The adjustable resolution for Trigger Level is 0 02 division for Ch1 or Ch2 source and Ch3 Ch4 for the TPS2014B TPS2024B 20 mV for Ext source 100 mV for Ext 5 source 200 mV for Ext 10 source TPS2000B Series Digital Storage Oscilloscopes Service Manual 1 5 Specifications Table 1 3 Triggering system cont Characteristic Trigger Level Accuracy typical Description Accuracies are for signals having rise and f
17. Verification Performance Verification This section contains performance verification procedures for the specifications marked with the V symbol The following equipment or a suitable equivalent is required to complete these procedures Required Equipment Table 4 1 Required equipment Description Minimum requirements Examples DC Voltage Source 17 5 mV to 7 V 0 5 accuracy Fluke 9100 Universal Calibration System Leveled Sine Wave 50 kHz and 200 MHz 3 amplitude accuracy with Oscilloscope Calibration Module Option Generator 250 Time Mark Generator 10 ms period 10 ppm accuracy Fluke 5500A Multi product Calibrator with Oscilloscope Calibration Option Option 5500A SC 500 BNC Cable BNC male to BNC male 1 m 36 in long Tektronix part number 012 0482 XX 500 BNC Cable BNC male to BNC male 25 cm 10 in long Tektronix part number 012 0208 XX 500 Feedthrough BNC male and female connectors Tektronix part number 011 0049 XX Termination Dual Banana to BNC Adapter Banana plugs to BNC female Tektronix part number 103 0090 00 Splitter Power Frequency range DC to 4 GHz Tracking gt 2 0 Tektronix part number 015 0565 XX TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance Verification Test Record Table 4 2 Test record Instrument Serial Number Certificate Number
18. X 5 0 049 CTR DISPLAY ADAPTER POWER SUPPLY CABLE 10 211 1272 00 23 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 11 174 4904 01 1 ON OFF SWITCH CABLE ASSEMBLY 12 878 0597 00 1 CKT BD ASSY ACQUISITION BD 2CH 878 0598 00 1 CKT BD ASSY ACQUISITION BD 4CH 13 174 5897 00 1 ASSY SP DISPLAY CABLE 14 202 0485 00 1 ASSEMBLY REAR CASE 15 367 0538 00 1 HANDLE OVERMOLDED 16 348 1791 00 2 FOOT REAR BLACK 0 4 X 0 4 X 0 1 HEIGHT 17 200 5105 00 2 COVER ESD PROTECTION 18 348 1704 00 2 FOOT REAR SANTOPRENE BLACK 19 200 4844 00 1 COVER BATTERY DOOR 20 348 1703 00 2 FOOT FRONT FLIPMPC ABS SILVER GRAY 21 146 0150 01 2 BATTERY LITHIUM ION RECHARGEABLE 11 V 6 6 AH SMBUS RECESSED TERMINALS UL SAFETY CONTROLLED 22 200 4847 00 5 COVER ISOLATION BARRIER 23 211 1273 00 9 EXACT DUPLICATE OF 211 1143 00 SCREW PT K35 1 57 PAN HEAD STL ZNPL T 15 24 337 4305 00 4 SHIELD CHANNEL ATTENUATION 25 878 0620 00 1 BD ASSY I O BOARD 26 878 0037 72 1 MODULAR ASSEMBLY COMPACT FLASH ASSEMBLY 27 213 1139 00 2 SCREW TPG TF 2 28 X 0 188 PLASTITE PHILLIPS PNH STL ZN PL 28 211 1216 00 4 SCREW PAN HEAD PT T8 3MM X 1 34 X 4 3MM LCD 29 878 0444 00 1 CKT BD ASSY FRONT PANEL BD 2CH 878 0445 00 1 CKT BD ASSY FRONT PANEL BD 4CH 30 850 0115 00 1 DISPLAY COLOR TPS2000B Series Digital Storage Oscilloscopes Service Manual 8 3 Replaceable Parts Table 8 2 Replaceable parts list cont
19. a static charge on the workstation surface m Handle circuit boards by the edges when possible Do not slide the modules over any surface Avoid handling modules in areas that have a floor or work surface covering capable of generating a static charge Inspection and Cleaning General Care Inspection and Cleaning 6 2 Procedures This section tells how to inspect for dirt and damage and how to clean the oscilloscope Inspection and cleaning are done as preventive maintenance which when done regularly may prevent malfunctions and enhance reliability Preventive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it Perform preventive maintenance more often if you operate the oscilloscope in a severe environment A good time to perform preventive maintenance is just before adjustment of the oscilloscope For best performance follow these recommendations B Protect the oscilloscope from adverse weather conditions The oscilloscope is not waterproof Do not store or leave the oscilloscope where the liquid crystal display LCD is exposed to direct sunlight or high humidity for long periods of time The front and rear cases help keep dust out of the oscilloscope and must be in place during normal operation To avoid damage to the oscilloscope or probes do not expose them to any sprays liquids or solvents The accumulation of dirt on internal compon
20. acquisition ASIC Control of the amplifier ASIC across the isolation boundary is provided by an optocoupler Power is provided to each amplifier ASIC and associated circuits by an isolated switching power supply dedicated to each channel TPS2000B Series Digital Storage Oscilloscopes Service Manual Theory of Operation Each acquisition ASIC contains samplers and peak detectors an amplifier an A D converter and the trigger logic The digitized waveform samples are transferred to the processing and display ASIC In four channel systems the two acquisition ASICs are interconnected so that a trigger on one ASIC can produce a trigger on the other The processor system adds the microprocessor and FLASH ROM to the processing and display system The processor system interprets the front panel control changes detected by the display ASIC provides control parameters based upon user setting requests computes waveform measurements and manages the internal and external peripherals Saved setups waveforms and calibration constants are stored in nonvolatile memory NVRAM The processor system shares DRAM with the display system Processing and Display The processing and display system consists of the display ASIC DRAM and System system oscillator Digitized acquisition samples are received by the display ASIC and stored in DRAM Once data are received by the display ASIC various corrections are applied display rasterization is performed and
21. be limited to 300 V these values are exceeded damage to the oscilloscope may result Refer to the Overvoltage Category description See Table 1 9 on page 1 9 Maximum Float Voltage Number of Digitized Bits Rated 600 Vays CAT Il Between instrument common chassis and BNC shell Using rated connectors or accessories 8 bit resolution except when set to 2 mV div each channel sampled simultaneously TPS2000B Series Digital Storage Oscilloscopes Service Manual 1 1 Specifications Table 1 1 Signal acquisition system cont Characteristic Description Supported Voltage Probe Attenuation Factors 1X 10X 20X 50X 100X 500X 1000X This adjusts the display scale factor of the instrument to accommodate various probe types Accuracy of the probe used must be added to the accuracy specifications of instrument The Tektronix probe Interface is not provided so the user must adjust the setting to match the probe characteristics Supported Current Probe Scales Acquisition Modes 1 mV mA 5 mV mA 1 mV A 10 mV A 20 mV A 50 mV A 100 mV A 200 mV A This adjusts the display scale factor of the instrument to accommodate various probe types Accuracy of the probe used must be added to the accuracy specifications of instrument The Tektronix probe Interface is not provided so the user must adjust the setting to match the probe characteristics Sample Peak Detect and Average Envelope mode not provided D
22. cable on the I O board 4 Install the rear case TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 9 Maintenance lO Board Removal To remove the I O board follow these steps See Figure 6 2 on page 6 10 1 2 Remove the rear case See page 6 7 Rear Case Disconnect all cables from the I O board Note the cable connections so that you can reinstall them Remove the three chassis mounting screws from the I O board Unseat the I O board from its connector on the Acquisition board and lift up to remove the I O board Installation To install the I O board follow these steps See Figure 6 2 1 Align the connector on the bottom of the I O board with the connector on the Acquisition board Press down to seat the connector 2 Install the three I O board mounting screws to attach the board to the support bracket 3 Connect all cables to the I O board as noted in step 2 of the Removal procedure 4 Install the rear case Sg p lt board screws 3 Display Adapter board 0447 006 Figure 6 2 Modules accessed from the rear of the oscilloscope TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Acquisition Board You will need a torque limiting Torx T 15 long shank screwdriver a flat blade screwdriver and a 16 mm 5 8 inch deep socket for this procedure N CAUTION The Acquisition board is particularly sensitive to ESD Read the Preven
23. can damage the eye In case of eye contact with battery fluids do not rub eyes Immediately flush eyes thoroughly with water for at least 15 minutes lifting upper and lower lids until no evidence of the fluid remains Seek medical attention See Environmental Considerations in the TPS2000B user manual TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Repackaging Instructions Packaging Storage Use these procedures to repackage the oscilloscope for shipment or storage CAUTION Remove rechargeable battery packs from the instrument before shipping and store the batteries in an approved area Failure to do so can cause damage to the oscilloscope See page 6 26 Lithium Ion Battery Maintenance To ship the instrument for repair use the original packaging container if possible If the container is unfit for use or unavailable package the instrument as follows Usea corrugated cardboard shipping carton having a test strength of at least 125 kg 275 pounds The shipping carton should have an inside dimension at least 15 25 cm six inches greater than the oscilloscope dimensions Make sure to remove the battery before placing the oscilloscope into the shipping carton Store the battery according to the recommendations See page 6 27 Storage m Make sure that the oscilloscope is adequately padded with a cushioning material such as foam paper or bubble wrap The oscilloscope should n
24. comp CLK SDATA Isolated Plane FISO A2D DSP Peak Detect Raster Trigger Display Preamp Attenuator ADG420 az ADG522 V ANDE CLK SDATA Isolated Plane 1 Preamp Attenuator eee FISO A2D V ANS CLK SDATA ns T Isolated Plane Raster ADG421 Display Preamp Power Supply Attenuator ADG522 2 Smart Batteries Smart Charger Vanna CLK SDATA Real time Buffers RS 223 Isolated Plane 1 Clock Printer Preamp C t Trigger Attenuator on GNDT V ADG420 0447 007 Figure 7 1 TPS2000B Series block diagram TPS2000B Series Digital Storage Oscilloscopes Service Manual 7 1 Diagrams 7 2 TPS2000B Series Digital Storage Oscilloscopes Service Manual Replaceable Parts Replaceable Parts This section contains a list of the replaceable modules for the TPS2000B Series oscilloscopes Use this list to identify and order replacement parts Parts Ordering Information Module Servicing Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements Therefore when ordering parts it is important to include the following information in your order Part number Instrument type or model number Instrument serial number Instrument modification number if applicable If you order a p
25. is set to 0V Volts div setting Vos 5 mV div 17 6 mV 17 6 mV 200 mV div 720 mV 720 mV 2 Vidiv 7 2 V 7 2 V 5 Record DC Measurement Accuracy with Vertical Position not set to OV Set the Vertical Position to 1 x positive voltage 2 and record the mean measurement in the test record as With Vertical Position not Zero b Set the Vertical Position to negative voltage 2 and record the mean measurement in the test record as with Vertical Position not zero c Repeat for all settings in the table and ensure that all readings are within the limits given in the Test Record TPS2000B Series Digital Storage Oscilloscopes Service Manual 4 7 Performance Verification Check Bandwidth 4 8 DC voltage source output levels When Vertical Position is not set to OV Volts div setting 5 mV div 35 mV 35 mV 200 mV div 1 4V 1 4 mV 2 Vidiv 14 4 V 144V 7 Set DC voltage source output level to 0 V 8 Disconnect the test setup 9 Repeatsteps 1 through 8 until all input channels have been checked CH1 and CH2 for a two channel model CH1 CH2 CH3 and CH4 for a four channel model This test checks the bandwidth of all input channels 1 Setup the oscilloscope using the following steps Press menu button Select menu option Select setting DEFAULT SETUP Channel 1 Voltage Probe 1X ACQUIRE Average 16 TRIGGER Coupling Noise MEA
26. setting Input Refer to the DC voltage setup 1 diagram 1 DC Voltage 1 0 0 V CH1 2 DC Voltage 1 20 0 V 3 DC Voltage 1 2 0 V 4 DC Voltage 1 1 6 V 5 DC Voltage 1 1 2 V 6 DC Voltage 1 0 8 V 7 DC Voltage 1 0 4 V 8 DC Voltage 1 0 32 V 9 DC Voltage 1 0 2 V 10 DC Voltage 1 0 16 V 11 DC Voltage 1 0 08 V 12 DC Voltage 1 0 04 V 13 DC Voltage 1 0 03 V 14 DC Voltage 1 0 02 V 15 DC Voltage 1 0 015 V 16 DC Voltage 1 0 015 V 17 DC Voltage 1 0 02 V 18 DC Voltage 1 0 03 V 19 DC Voltage 1 0 04 V 20 DC Voltage 1 0 08 V 21 DC Voltage 1 0 16 V 22 DC Voltage 1 0 2 V 23 DC Voltage 1 0 32 V 24 DC Voltage 1 0 4 V 25 DC Voltage 1 0 8 V 26 DC Voltage 1 1 2 V 27 DC Voltage 1 1 6 V 28 DC Voltage 1 2 0 V 29 DC Voltage 1 20 0 V 30 DC Voltage 1 0 0 V TPS2000B Series Digital Storage Oscilloscopes Service Manual 5 5 Adjustment Procedures 5 6 Table 5 2 Adjustments steps 73 108 for 4 CH models only cont Proceduresteps Signal Signal source setting Input Refer to the DC voltage setup 2 diagram 31 DC Voltage 2 25 0 V EXT 32 DC Voltage 2 12 5 V TRIG 33 DC Voltage 2 2 5 V 34 DC Voltage 2 25V 35 DC Voltage 2 12 5V 36 DC Voltage 2 25 V Refer to the sine wave generator setup diagram BW refers to the maximum bandwidth of the oscilloscope 37 Sine Wave Generator 50 Q 5 kHz 1 Vp p CH1 38 Sine Wave Generator 50 0 1 MHz 100 mV p 39 S
27. the LCD at higher altitudes This damage is independent of operation Pollution Degree 2 Random Vibration Operating Nonoperating 0 31 grus from 5 Hz to 500 Hz 10 minutes 2 46 grus from 5 Hz to 500 Hz 10 minutes on each axis on each axis 3 axes 30 minutes total 3 axes 30 minutes total Mechanical Shock operating 4 Half sine mechanical shocks 50 g peak amplitude 11 ms duration 3 drops in each direction of each axis 18 total 1 Charge battery packs between 0 C and 45 C 32 F to 113 F Charging battery packs outside this range can damage cells or cause them to leak 2 Battery packs are rated to operate between 10 C and 50 C 14 F and 122 F with less than 80 relative humidity Operating outside this range can cause damage Battery discharge capacity drops significantly at temperatures below 0 C 32 F and above 45 C 113 F 3 Max wet bulb 4 With one battery pack installed TPS2000B Series Digital Storage Oscilloscopes Service Manual 1 9 Specifications 1 10 TPS2000B Series Digital Storage Oscilloscopes Service Manual Operating Information Operating Information For information on installing and operating your TPS2000B Series Digital Storage Oscilloscope refer to the TPS2000B Series Digital Storage Oscilloscope User Manual See page 1x Related Manuals TPS2000B Series Digital Storage Oscilloscopes Service Manual 2 1 Operating Information 2 2 TPS2000B Series Digital
28. 0 BWL 120 64 Sine Wave Generator 50 0 BWL 300 65 Sine Wave Generator 50 0 BWL 600 mV 66 Sine Wave Generator 50 0 BWL 1 2 Vp p 67 Sine Wave Generator 50 Q 5 kHz 2 5 68 Sine Wave Generator 50 Q 1 MHz 2 5 V 69 Sine Wave Generator 50 Q 50 kHz 2 5 Vp p 70 Sine Wave Generator 50 Q 20 MHz 2 5 V 71 Sine Wave Generator 50 Q BWL 2 5 Vp p 72 Sine Wave Generator 50 Q BWL 5 Vp p 73 Sine Wave Generator 50 Q 5 kHz 1 CH3 74 Sine Wave Generator 50 Q 1 MHz 100 mV p 15 Sine Wave Generator 50 0 1 MHz 1 V 76 Sine Wave Generator 50 50 kHz 1 2 Vp p 77 Sine Wave Generator 50 20 MHz 1 2 Vs 78 Sine Wave Generator 50 0 BWL 30 79 Sine Wave Generator 50 0 BWL 60 mV 80 Sine Wave Generator 50 Q BWL 120 mV 81 Sine Wave Generator 50 0 BWL 300 mV 82 Sine Wave Generator 50 Q BWL 600 mV 83 Sine Wave Generator 50 0 BWL 1 2 Vo 84 Sine Wave Generator 50 0 5 kHz 2 5 Vo 85 Sine Wave Generator 50 0 1 MHz 2 5 Vo 86 Sine Wave Generator 50 Q 50 kHz 2 5 Vp p 87 Sine Wave Generator 50 20 MHz 2 5 V 88 Sine Wave Generator 50 0 BWL 2 5 Vp p 89 Sine Wave Generator 50 BWL 5 Vp p 90 Sine Wave Generator 50 Q BWL 1 6 Vp p 91 Edge 50 Q 1 kHz 0 to 800 mV fast rising edge TPS2000B Series Digital Storage Oscilloscopes Service Manual 5 7 Adjustment Procedures 5 8 Table 5 2 Adjustments steps 73 108 are for 4 CH models only cont
29. Acquisition board first Compact flash module Remove front case and See page 6 18 Acquisition board first TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Rear Case You will need a torque limiting Torx T 15 screwdriver for this procedure Removal To remove the rear case follow these steps See Figure 6 1 1 Open the battery door and remove the batteries 2 Place the oscilloscope face down a soft surface such as an antistatic mat 3 Remove the two small ESD protective covers rubber plugs from the bottom left and right sides of the rear case 4 Remove the five screws that secure the rear case to the chassis Tilt the handle to gain access to the top two screws 5 Lift up and remove the rear case from the oscilloscope chassis Installation Follow these procedure to reinstall the rear case See Figure 6 1 1 Place the oscilloscope face down on a soft surface 2 Ensure that all cables are routed within the internal chassis area 3 Place the rear case over the assembled oscilloscope and ensure that edges align with the chassis The RS 232 printer and power connectors align and feed through the rear case without binding 4 Install the five screws to attach the rear case Tilt the handle to access the top two holes 5 Install the two small ESD protective covers rubber plugs on top of the two screws at the bottom left and right of the rear panel 6 Install the bat
30. C Gain Accuracy 3 for Sample or Average acquisition mode 5 V div to 10 mV div 4 for Sample or Average acquisition mode 5 mV div and 2 mV div DC Measurement Accuracy Average Acquisition Mode Measurement Type Accuracy Average of 216 waveforms with 3 x reading 0 1 div 1 mV vertical position at zero Average o f 216 waveforms with vertical position not at zero 3 reading vertical position 1 of vertical position 0 2 div Add 2 mV for settings from 2 mV div to 200 mV div Add 50 mV for settings from gt 200 mV div to 5 V div DC Voltage Measurement Repeatability Average Acquisition Mode Change in measured volts between any two averages of 16 waveforms acquired under the same setup and ambient conditions 3 of reading 0 05 div Analog Bandwidth Analog Bandwidth in Sample and Average modes at BNC or with probe set to 10X DC Coupled typical Defined in Section 4 6 of IEEE std 1057 The difference between the upper and lower frequencies at which the amplitude response as seen in the data record is 0 707 3 dB of the response seen in the data record at the specified reference frequency Specified only 3 dB point does not include in band response TPS2012B and TPS2014B DC to 100 MHz for all V div settings with bandwidth limit at full TPS2024B DC to 200 MHz for all V div settings 5 mV and above for operating temperatures from 0 C to 40 C DC to 180 MHz fo
31. CD data cable from the Display module leave the other end connected to J302 on the Display Adapter board See Figure 6 7 CAUTION Do not separate the display shield from the Display module Removing the shield will destroy the attaching gasket Chassis Display module a screws 4 LCD Backlight cable Display module 0447 002 Figure 6 7 Removing the Display module Installation To install the Display module follow these steps See Figure 6 7 TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 17 Maintenance Compact Flash Board Keypad 1 Connect the LCD data cable to the display it routes through the slot in the chassis from the Display Adapter board J302 2 Align the Display module with the mounting tabs on the front of the chassis 3 Install the four screws that attach the Display module to the chassis 4 Reposition the copper tape to cover the LCD data cable 5 Connect the LCD backlight cable through the slot in the chassis to the Display Adapter board J202 6 Install the Acquisition and I O boards 7 Install the Front Panel board 8 Install the front case You will need a torque limiting Torx T 15 screwdriver for this procedure Removal To remove the Compact Flash board perform the follow these steps See Figure 6 5 on page 6 15 1 Remove the Acquisition board See page 6 11 Acquisition Board 2 Remove the two screws below the I O bo
32. From troubleshooting tree page 3 To troubleshooting tree page 3 See boot up screen No Put scope or frequency counter on probe comp Yes E gt Repl To troubleshooting eplace Acquisition ree page board Front panel Yes 0 problems i To troubleshooting Verify LCD connector and cable values Run probe check on each channel Good Replace display voltages or display cable 9 pay Replace Acquisition board Probe check ok Replace Acquisition board Connect external trigger to probe comp Trigger Replace indicator ON Acquisition board Set trigger source to EXT Press set 50 Figure 6 9 Oscilloscope troubleshooting tree page 1 of 4 TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 21 Maintenance gt Acquisition From troubleshooting problem To troubleshooting tree page 1 tree page 4 Able to run Replace Front Verify 10 board TN front panel Panel or voltages tests Acquisition board From troubleshooting tree page 1 E ee Run front panel From troubleshooting tests in service tree page 3 menu IO board Disconnect IO voltages OK board Verify power Replace supply Voltages Acquisition Replace soara Acquisition board lt 5 key problem Power Replace IO supplies Replace Front Panel board
33. IAN 335 2330 00 1 LABEL 2 CH LANGUAGE GERMAN 335 2331 00 1 LABEL 2 CH LANGUAGE SPANISH 335 2332 00 1 LABEL 2 CH LANGUAGE JAPANESE 335 2333 00 1 LABEL 2 CH LANGUAGE PORTUGUESE 335 2334 00 1 LABEL 2 CH LANGUAGE CHINESE SIMPLIFIED 335 2335 00 1 LABEL 2 CH LANGUAGE CHINESE TRADITIONAL 335 2336 00 1 LABEL 2 CH LANGUAGE KOREAN 335 2337 00 1 LABEL 2 CH LANGUAGE RUSSIAN 335 2338 00 1 LABEL 4 CH LANGUAGE FRENCH 335 2339 00 1 LABEL 4 CH LANGUAGE ITALIAN 335 2340 00 1 LABEL 4 CH LANGUAGE GERMAN 335 2341 00 1 LABEL 4 CH LANGUAGE SPANISH 335 2342 00 1 LABEL 4 CH LANGUAGE JAPANESE 335 2343 00 1 LABEL 4 CH LANGUAGE PORTUGUESE 335 2344 00 1 LABEL 4 CH LANGUAGE CHINESE SIMPLIFIED 335 2345 00 1 LABEL 4 CH LANGUAGE CHINESE TRADITIONAL 335 2346 00 1 LABEL 4 CH LANGUAGE KOREAN 335 2347 00 1 LABEL 4 CH LANGUAGE RUSSIAN 42 200 4845 00 1 COVER FRONT PROTECTIVE OPTIONAL ACCESSORIES The following parts are commonly ordered for use with these oscilloscopes For a complete list of standard and optional accessories refer to your product user manual available for download at www tektronix com manuals 43 TPS2PWR1 POWER APPLICATION SOFTWARE MODULE 44 156 9413 00 MEMORY CMOS FLASH 32 MORE MEMORY MODULE COMPACT FLASH CF 1 SDCFB16 101 00 50 PIN MODULE 1 EA 0 CT8MBC1 MD TPS2000B Series Digital Storage Oscilloscopes Service Manual 8 5 Replaceable Parts
34. Manual Table of Contents Check Bandwidth e aa anna ee 4 8 Check Sample Rate and Delay Time 0 4 4 0 2 2 4 9 Check Edge Trigger 52 2 0 4 10 Check External Edge Trigger 2 4 1 Adjustment Procedures Adjustment Procedures Bi E de nnA 5 1 Required Equipinent ooo ceder neas less aaa 5 Adjustment Procedure RR ken 5 2 Maintenance Maintenance A nennen ee 6 1 Pr paration uses Hause 6 1 Preventing ESD messen ass en 6 1 Inspection and Cleaning ta ab 6 2 Removal and Installation 2 2 0 6 5 Rear nn mnie 6 7 hope 6 9 ONDE 6 10 Acquisition Bra 6 11 Display Adapter 1 6 12 Front Panel nobis 6 14 Front Case nu ee rn 6 14 Front Panel Board ee Aa io 6 16 Display Module iii El 6 17 Compact Flash Board ea ta bee a HE aan 6 18 Keypad user SR 6 18 yerbum DUAE 6 20 Troubleshooting Tree P 6 21 Lithium Ion Battery Maintenance 2 enne 6 26 Repackaging Instructions
35. SURE Source Channel 1 Type Pk Pk 2 As shown in the following figure connect the oscilloscope channel selected in the table to the leveled sine wave generator 3 Set the oscilloscope VOLTS DIV to 500 mV div Leveled sine wave generator Output Digitizing oscilloscope 0000002 CO ee aq olo 000 2 oE Ao 50 Q feedthrough terminator BNC cable 4 Set the oscilloscope SEC DIV to 10 ms div 5 Set the leveled sine wave generator frequency to 50 kHz TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance Verification 6 Set the leveled sine wave generator output level so the peak to peak measurement is between 2 98 V and 3 02 V 7 Set the leveled sine wave generator frequency to 100 MHz if you are checking a TPS2012B 2014B 200 MHz if you are checking a TPS2024B 180 MHz for operating temperatures from 40 C to 50 C 8 Set the oscilloscope SEC DIV to 10 ns div 9 Check that the peak to peak measurement is gt 2 12 V 10 Disconnect the test setup 11 Repeat steps 1 through 10 until all input channels have been checked Check Sample Rate and This test checks the time base accuracy Delay Time Accuracy 1 Set up the oscilloscope using the following steps
36. Storage Oscilloscopes Service Manual Theory of Operation Theory of Operation This section describes the electrical operation of the TPS2000B Series oscilloscopes to the module level It describes the basic operation of each functional circuit block shown in the following figure Compact Flash J1 Compact Acquisition Board Isolation Board FLASH Card Sh Circuit Lo p 5 Application E CH2 Isolation Circuit Isolation Circuit CHA Isolation Front Panel Circuit EXT Isolation Trig Circuit Display Adapter Board J401 Display Display data Module J302 Display IO Board 1201 J202 Backlight Power amp Backlight Control DC Input Switch RS 232 r 4 r 1 Parallel Battery Battery Pot j I 2 I 4 0447 009 Figure 3 1 TPS2000B Series module level block diagram Remove CH3 and CH4 for a 2 channel version TPS2000B Series Digital Storage Oscilloscopes Service Manual 3 1 Theory of Operation Acquisition Board 3 2 Acquisition System The Acquisition board of the TPS2000B Series four channel oscilloscope is essentially a dual two channel oscilloscope tied together through a common microprocessor and some special interconnects This allows the combining of the display and trigger systems The focus of this Acquisition board discussion is on the two channel syste
37. TPS2000B Series Digital Storage Oscilloscopes Service Manual Tektronix 077 0447 00 Y TPS2000B Series Digital Storage Oscilloscopes Service Manual This document supports firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Tektronix 077 0447 00 Copyright Tektronix All rights reserved Licensed software products are owned by Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and international treaty provisions Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc Contacting Tektronix Tektronix Inc 14150 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In North America call 1 800 833 9200 Worldwide visit www tektronix com to find contacts in your area Table of Contents General Safety Summary 22 2 2 Service Safety 0 0 lab mE PROGUCIS
38. TPS2024B 1 V from 10 MHz to 100 MHz 200 MHz if you are checking TPS2024B 2 V from 100 MHz to 200 MHz 4 Setthe oscilloscope VOLTS DIV to 500 mV div 5 Setthe oscilloscope SEC DIV to 10 ns div 6 Setthe leveled sine wave generator output to the following levels TPS2012B TPS2014B TPS2024B 100 MHz measurement 1 TPS2024B 200 MHz measurement 2 Vp p NOTE The measured amplitude can fluctuate around 1 V for the TPS2012B TPS2014B TPS2024B 100 MHz measurement and 2 V for the TPS2024B 200 MHz measurement 7 Press SET LEVEL TO 50 Adjust TRIGGER LEVEL as necessary and check that triggering is stable 8 Change the oscilloscope setup using the following step Press menu button Select menu option Select setting TRIGGER Slope Falling 9 Press SET LEVEL TO 50 Adjust TRIGGER LEVEL as necessary and check that triggering is stable 10 Disconnect the test setup 4 12 TPS2000B Series Digital Storage Oscilloscopes Service Manual Adjustment Procedures Adjustment Procedures This section contains adjustment procedures for the TPS2000B Series oscilloscopes Only qualified personnel should perform service procedures Read the Service Safety Summary and the General Safety Summary at the beginning of this manual before performing any service procedures NOTE The voltage references inside TPS2000B Series oscilloscopes are very stable over time and should not require routine updates Before performin
39. The IO board accepts the power input for the oscilloscope from either a 15 external supply or from one of two internal Lithium Ion battery packs The battery packs are SMBus compliant and user replaceable A microcontroller manages the routing of power from the DC input and the two battery packs It also manages the charging of batteries and communication to the Acquisition board The instrument cooling fan is powered by the IO board The fan can be switched on and off having its voltage varied by signals from the Acquisition board Power for the LCD Backlight Inverter board is supplied by the IO board A dimming voltage derived from a PWM pulse train and RC low pass filter controls the brightness of the backlight RS 232 and Parallel port signals are passed from the Acquisition board through the IO board to their rear mounted connectors The Liquid Crystal Display pattern consists of 320 columns with 3 subcolumns and 240 rows and has associated drivers and a backlight All switches position encoders and LEDs are mounted on the Front Panel board of the two channel oscilloscope Additionally an IC on this board provides buffering and multiplexing of switch signals for the Acquisition board Two signals and a sense line are provided by the Acquisition board to support the front panel One of these signals resets the scan and a second clocks the scan to the next position The sense line receives the current state of the selected s
40. all times 220 ns Source Accuracy Internal 0 2 div 5 mV within 4 divisions from center screen having rise and fall times of gt 20 ns EXT 6 of setting 250 mV for signals less than 2 V EXT 5 6 of setting 500 mV for signals less than 10 V EXT 10 6 of setting 1 V for signals less than 20 V A sine wave with 20 ns rise time corresponds to about 18 MHz Default Settings Video Trigger Coupling is AC and Auto except for a single sequence acquisition Signal Formats and Field Rates Video Trigger Type Supports NTSC PAL and SECAM broadcast systems for any field or any line Sensitivity Video Trigger Type typical Composite video signal Source Range Internal Peak to peak amplitude of 2 div EXT 1 V of composite video EXT 5 5 V of composite video EXT 10 10 V of composite video A 2 division composite video signal will have a 0 6 division sync tip Pulse Width Trigger Pulse Width Trigger modes Trigger when lt Less than gt Greater than Equal or Not Equal Positive pulse or Negative pulse Pulse Width Trigger Point Equal The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level Not Equal If the pulse is narrower than the specified width the trigger point is the trailing edge Otherwise the oscilloscope triggers when a pulse continues longer than the time specified as the Pulse Width Less than The trigger point i
41. an 3 As shown in the following figure connect the oscilloscope channel to be tested to the DC voltage source TPS2000B Series Digital Storage Oscilloscopes Service Manual 4 5 Performance Verification DC voltage Digitizing oscilloscope source Oe Oona ow a O Or XX O cas A 63 F Dual banana Ol oo 0000 o op to BNC adapter BNC cable 4 For each VOLTS DIV setting listed in the following table perform the following steps a Set the DC voltage source output level to the positive voltage listed and record the mean measurement as Vos b Reverse the polarity of the DC voltage source and record the mean measurement as Vs c Calculate Vait Vpos Vneg and compare Vait to the accuracy limits in the table DC voltage source VOLTSIDIV setting output levels Accuracy limits for 5 mV div 17 5 mV 17 5 mV 33 6 mV to 36 4 mV 200 mV div 700 mV 700 mV 1 358 V to 1 442 V 2 Vidiv 7 00 V 7 00 V 13 58 V to 14 42 V 5 Set DC voltage source output level to 0 V 6 Disconnect the test setup 7 Repeat steps 1 through 6 until all input channels have been checked CH1 and CH2 for a two channel model CH1 CH2 CH3 and CH4 for a four channel model Check DC Measurement This test checks the DC measurement accuracy of all input chann
42. ard mounting bracket that attach the Compact Flash board to the internal chassis See Figure 6 2 on page 6 10 3 Remove the single screw below the Display module that attaches the Compact Flash board to the external chassis 4 Remove the Compact Flash board Installation To install a new Compact Flash board follow these steps 1 Align the Compact Flash board with the mounting bracket on the front of the chassis and the mounting posts on the inside of the chassis 2 Install the screws the attach the compact board to the chassis 3 Reinstall the Acquisition board You will need a torque limiting Torx T 15 screwdriver and 16 mm 5 8 inch deep socket for this procedure Removal To remove the switch keypad follow these steps See Figure 6 8 1 Remove the front case See Figure 6 5 2 Lift the keypad out of the front case CAUTION Keep the electrical contacts on the back of the keypad clean Skin oils and dust will inhibit good electrical contact TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Use care to avoid touching the electrical contacts Keypad Front case Figure 6 8 Removing and installing the keypad Installation To install the switch keypad follow these steps See Figure 6 8 1 Place the front case face down on a soft surface 2 Align the switch keypad into the front case using the guide posts and the holes in the keypad CAUTION
43. art that was replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Modules can be serviced by selecting one of the following two options Contact your local Tektronix service center or representative for repair assistance Module exchange In some cases you may exchange your module for a remanufactured module These modules cost significantly less than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 833 9200 and select option 2 New modules You may purchase replacement modules in the same way as other replacement parts TPS2000B Series Digital Storage Oscilloscopes Service Manual 8 1 Replaceable Parts Using the Replaceable Parts List This section contains a list of the mechanical and electrical components that are replaceable for the oscilloscope Use this list to identify and order replacement parts The following table describes each column in the parts list Table 8 1 Parts list column descriptions Column Column name Description 1 Figure amp Index Items in this section are referenced by figure and index Number numbers to the exploded view illustrations that follow 2 Tektronix Part Use this part number when ordering replacement parts Number from Tektronix 4 Serial Number Column three indicates the serial number at which the pa
44. ay Adapter board noting the connections so that you can reconnect the cables during installation Disconnect the LCD data cable from the Display module and pass enough cable through the hole in the chassis so that you will be able to lift the Display Adapter board off the chassis with this cable still connected Remove the four screws that attach the Display Adapter board to the chassis and lift the board off the chassis enough to access the LCD data cable connector Disconnect this cable and remove the Display Adapter board from the instrument Installation To install the Display Adapter board follow these steps See Figure 6 2 1 Connect the four cables to the Display Adapter board as noted in step 5 in the Removal procedure as follows Cable From To LCD backlight cable Display module Display Adapter board J202 LCD data cable 174 5861 00 Display module Display Adapter board J302 Display cable 174 5897 00 Acquisition board Display Adapter board J401 201 Display Adapter power supply I O board J600 Display Adapter board J201 cable 174 4949 01 2 Soy UN 09 Route the LCD data cable through the slot in the chassis to where it will connect to the Display module Align the Display Adapter board with the mounting holes in the chassis Install the four screws that attach the Display Adapter board to the chassis Connect the other end of the LCD data cable to the Display module Install all of the modules t
45. e MEASURE Source Channel 1 Type Pk Pk 2 As shown in the following figure connect the oscilloscope channel selected in the table to the leveled sine wave generator Leveled sine wave Digitizing oscilloscope generator Q eod O opoOoDOO O go o Ono Q00g Output o EB 50 feedthrough terminator BNC cable Set the oscilloscope VOLTS DIV to 500 mV div Set the oscilloscope SEC DIV to 25 ns div Set the leveled sine wave generator frequency to 10 MHz Set the leveled sine wave generator output level to approximately 500 mV 50 that the measured amplitude is approximately 500 mV The measured amplitude can fluctuate around 500 mV 7 Press SET LEVEL TO 50 Adjust TRIGGER LEVEL as necessary and check that triggering is stable TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance Verification 8 Set the leveled sine wave generator frequency to the following 100 MHz if you are checking a TPS2012B 2014B 200 MHz if you are checking TPS2024B 9 Set the oscilloscope SEC DIV to 10 ns div 10 Set the leveled sine wave generator output level to approximately 750 mV p p so that the measured amplitude is approximately 750 mV The measured amplitude can fluctuate around 750 mV 11 Press SET LEVEL 50 Adjust TRIGGER LEVEL as necessary a
46. e chassis 3 Pull out to remove the Front Panel board from the chassis This will unseat the feedthrough connection between the Front Panel board and the Acquisition board on the opposite side Front panel circuit board screws 5 Front panel circuit board 0447 003 Figure 6 6 Removing the Front Panel module Installation To install the Front Panel module follow these steps See Figure 6 6 1 Align the Front Panel board over the front chassis and reseat the feed through connection between the Front Panel board and the Acquisition board on the opposite side 2 Install the five screws to attach the Front Panel board to the chassis 3 Install the front case TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Display Module You will need a torque limiting Torx T 8 screwdriver and pliers for this procedure Removal To remove the Display module follow these steps See Figure 6 7 1 Remove the front case See page 6 14 Front Case Remove the front panel board See page 6 16 Front Panel Board Remove the I O board See page 6 10 O Board Remove the Acquisition board See page 6 11 Acquisition Board cw Disconnect the LCD backlight cable from J202 on the Display Adapter board See Figure 6 2 on page 6 10 6 Remove the four screws that attach the Display module to the chassis Support the display with your hand 7 Remove the copper tape and disconnect the L
47. e input Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement instrument Observe all terminal ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Do not apply a potential to any terminal including the common terminal that exceeds the maximum rating of that terminal Do not operate without covers Do not operate this product with covers or panels removed Do not operate with suspected failures If you suspect that there is damage to this product have it inspected by qualified service personnel Avoid exposed circuitry Do not touch exposed connections and components when power is present Replace batteries properly Replace batteries only with the specified type and rating Recharge batteries properly Recharge batteries for the recommended charge cycle only Use proper AC adapter Use only the AC adapter specified for this product Wear eye protection Wear eye protection if exposure to high intensity rays or laser radiation exists TPS2000B Series Digital Storage Oscilloscopes Service Manual General Safety Summary Terms in This Manual Symbols and Terms on the vi Product Do not operate in wet damp conditions Do not operate in an explosive atmosphere Keep product surfaces clean and dry P
48. eep socket with wide center hole S K Hand Tool Corp S K 40820 or equivalent Torque wrench to 40 in Ib 4 5 N m B Screwdriver with 1 4 inch 6 35 mm flat blade Pliers all purpose and needle nose TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 5 Maintenance Replacement Procedures 6 6 Disassembly for replacement is best achieved by removing and replacing the modules in the specified order To remove and replace the rear case fan Display Adapter board IO board or Acquisition board refer to the following table Procedures for removing rear case and associated modules Remove module Prerequisite Procedure location Rear case See page 6 7 Fan Remove rear case first See page 6 9 IO board Remove rear case first See page 6 10 Acquisition board Remove rear case and IO See page 6 11 board first Display Adapter board Remove rear case fan See page 6 12 Acquisition board and Display module first To remove and replace the front case Front Panel board LCD display Compact Flash module or keypad refer to the following table Procedures for removing front case and associated modules Remove module Prerequisite Procedure location Front case See page 6 14 Front panel board Remove front case first See page 6 16 Keypad Remove front case first See page 6 18 Display module Remove front case Front See page 6 17 Panel board and
49. els Accuracy 1 Set the DC voltage source output level to 0 V 2 Setup the oscilloscope using the following steps Press menu button Select menu option Select setting DEFAULT SETUP Channel 1 Voltage Probe 1X ACQUIRE Average 64 MEASURE Source Channel 1 Type Mean 4 6 TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance Verification 3 As shown in the following figure connect the oscilloscope channel selected in the table to the DC voltage source DC voltage Digitizing oscilloscope source 5555558 GE E CB 00000 Boe E C SE 00000 r Dual banana ol Du 0000 D to BNC adapter BNC cable 4 Record DC Measurement Accuracy with Vertical Position set to 0V a Ensure that the Vertical Position is set to zero b Setthe DC voltage source output level to the positive voltage listed in the following table and record the mean measurement in the test record as With Vertical Position at zero Set the DC voltage source output level to the negative voltage listed in the following table and record the mean measurement in the test record as Vg With Vertical Position at zero d Repeat for all settings in the table and ensure that all readings are within the limits given in the Test Record DC voltage source output levels when Vertical Position
50. ents can cause them to overheat and fail Dirt also provides an electrical conduction path that could cause an oscilloscope failure especially under high humidity conditions Inspect and clean the oscilloscope and probes as often as operating conditions require Inspection exterior Inspect the outside of the oscilloscope for damage wear and missing parts Oscilloscopes that appear to have been dropped or otherwise abused should be checked thoroughly to verify correct operation and performance Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Cleaning procedure exterior To clean the oscilloscope exterior and probes 1 Remove loose dust on the outside of the oscilloscope and probes with a lint free cloth Use care to avoid scratching the clear glass display shield 2 Use a soft cloth dampened with water to clean the oscilloscope or use 75 isopropyl alcohol solution for more efficient cleaning N CAUTION To prevent getting moisture inside the oscilloscope during external cleaning use only enough liquid to dampen the cloth or applicator To avoid damage to the surface of the oscilloscope or probes do not use any abrasive or chemical cleaning agents Inspection interior Inspect and clean the interior if it appears that the oscilloscope may have been damaged or exposed to an unusually di
51. equence of calibration steps required by your oscilloscope and shown in the following procedure After the adjustment is complete disable the Service menu by pushing the UTILITY front panel button and the Service and Service Mode Off option buttons TPS2000B Series Digital Storage Oscilloscopes Service Manual Adjustment Procedures The following figure shows the setups required to complete the adjustment procedure DC voltage setup 1 Two Channel Four Channel Digitizing oscilloscope Digitizing oscilloscope DC voltage source 0259000 ge noone onan n OO O 0 s P PO yg pop oO Dual banana to BNC adapter 10 inch 10 inch BNC cables BNC cables BNC cables 10 inch BNC cable BNC T connector BNC cable BNC T connectors BNC cable BNC T connector 10 inch BNC cable DC voltage setup 2 Two Channel Digitizing oscilloscope DC voltage source GOGAT DOO DOD D 00000 OOO 000000 0 Dual banana to BNC adapter BNC cable 50 Q feedthrough terminator See Adjustment steps table for proper channel 50 O feedthrough terminator See Adjustment steps table
52. g any procedure in this chapter verify that the oscilloscope does not meet specifications Refer to the Performance Verification section to verify the specifications Required Equipment The equipment described in the following table or a suitable equivalent is required to complete the procedure Table 5 1 Required equipment Description Minimum requirements Examples DC Voltage Source 20 V to 20 V 0 1 accuracy Fluke 9100 Universal Calibration System Leveled Sine Wave 60 kHz and 200 MHz 0 6 amplitude accuracy with Oscilloscope Calibration Module Generator Option 250 Fluke 5500A Multi product Calibrator with Oscilloscope Calibration Option Option 5500A SC 500 BNC Cable BNC male to BNC male 1 36 in long Tektronix part number 012 0482 00 500 BNC Cable two BNC male to BNC male 25 cm 10 in long Tektronix part number 012 0208 00 500 Feedthrough BNC male and female connectors Tektronix part number 011 0049 01 Termination Dual Banana to BNC Adapter Banana plugs to BNC female Tektronix part number 103 0090 00 BNC T One male and two female BNC connectors Tektronix part number 103 0030 00 TPS2000B Series Digital Storage Oscilloscopes Service Manual 5 1 Adjustment Procedures Adjustment Procedure Enable the Service Menu 5 2 The adjustment procedure consists of multiple steps for the two channel oscilloscope and additional steps for the four channel model Each step req
53. ge overlay for the front panel controls TPS2000B Series Digital Storage Oscilloscopes Service Manual ix Preface Probe Safety A guard around the probe body provides a finger barrier for protection from electric shock Finger guard WARNING To avoid electric shock when using the probe keep fingers behind the guard on the probe body and do not touch metallic portions of the probe head while it is connected to a voltage source Connect the probe output to the oscilloscope before connecting the probe to the circuit under test Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement instrument x TPS2000B Series Digital Storage Oscilloscopes Service Manual Specifications Specifications These specifications apply to all TPS2000B Series oscilloscopes To verify that an oscilloscope meets specifications it must first meet the following conditions m The oscilloscope must have been operating continuously for twenty minutes within the specified operating temperature range See Table 1 9 You must perform the Do Self Cal operation accessible through the Utility menu if the operating temperature changes by more than 5 C m The oscilloscope must be within the factory calibration interval of one year The V div specifications apply with the probe calibration set to 1X probe mode Specifications begin in the following table All specif
54. hardware failure may exist Contact Tektronix 0 Diagnostics Diagnostics internal error Contact Tektronix 4 Diagnostics CH1 diagnostics failed Acquisition board or power supply failure 5 Diagnostics 2 diagnostics failed Acquisition board or power supply failure 7 Diagnostics ADG421 diagnostics failed Acquisition board or power supply failure 12 Diagnostics CH3 diagnostics failed Acquisition board or power supply failure 13 Diagnostics CH4 diagnostics failed Acquisition board or power supply failure 14 Diagnostics ADG421 2 diagnostics failed Acquisition board or power supply failure 255 Software Software defect Contact Tektronix TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 25 Maintenance Clearing the Error Log To clear the error log after fixing a problem follow these steps 1 Enable the Service menus See page 5 2 Enable the Service Menu 2 Push the UTILITY button and push the Service option button to display the Service menu 3 Push the Service Diag option button to display the Diagnostics menu 4 Push the Clear Error Log option button to clear the error log of past failures This also sets the Power Cycle count to zero Lithium lon Battery Maintenance Key Information 6 26 Lithium Ion rechargeable batteries require routine maintenance and care in their use and handling Read and follow the information in this document to safely use Lithium Ion batteries and achieve the
55. hat were removed Install the front case and the rear case TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 13 Maintenance Front Panel Knob Front Case Remove each front panel knob by firmly grasping the knob and pulling it off of the front panel If necessary insert a screwdriver between the front panel and knob and lift up Install the front panel knobs by aligning the keyed knob with the shaft and press the knob on the shaft You will need a torque limiting Torx T 15 screwdriver and 16 mm 5 8 inch deep socket for this procedure Removal To remove the front case follow these steps See Figure 6 5 on page 6 15 1 Remove the front panel knobs See page 6 14 Front Panel Knob 2 Place the oscilloscope with its rear case down on a soft surface such as an antistatic mat 3 Remove the BNC cover by prying up on the exposed edge 4 Use the 16 mm 5 8 inch deep socket to remove the nuts from the BNC connectors 5 Remove the plastic BNC shells from the BNC connectors Hold the BNC shell with your fingers and pull up to remove the shell See Figure 6 4 BNC cover Figure 6 4 Removing the BNC cover shell and retaining nuts 6 Follow the procedure to remove the rear case See page 6 7 Rear Case 7 Remove the four screws from the internal chassis that attach the chassis to the front cover See Figure 6 5 8 Lift the chassis off of the front case Installation To install the fron
56. ications are guaranteed unless noted typical Specifications that are marked with the symbol are checked in the Performance Verification section Signal Acquisition System Table 1 1 Signal acquisition system Characteristic Description Number of Input Channels Two 52012 or four TPS2014B TPS2024B identical channels digitized simultaneously Input Coupling DC AC or GND AC coupling connects a capacitor in series with the input circuitry The DC input impedance becomes very high since capacitance is in series with all paths to ground Ground coupling mode provides a reference waveform derived from the values identified during SPC This reference waveform shows visually where signal reference ground is expected to be Input Impedance DC Coupled 1 MQ 2 in parallel with 20 pF 3 pF Maximum Input Voltage between Signal and Reference at input BNC 1 Overvoltage Category Maximum Voltage and 300 Vnus CAT Ill 150 Vnus At front panel connector 300 derate at 20 dB decade above 100 kHz to 13 V peak AC at 3 MHz and above All inputs are rated 300 V CAT Il signal to floating common Derate at 20 dB decade above 100 kHz to 13 V peak AC at 3 MHz and above For nonsinusoidal waveforms peak value must be less than 450 V Excursion above 300 V should be less than 100 ms duration RMS signal level including any DC component removed through AC coupling must
57. illoscope is on and operating properly the PROBE COMP output should generate a square wave approximately 5 V in amplitude at a 1 kHz frequency Use the oscilloscope and the 10X probe to probe this output As shown in the following table there are two cases of defects Either the 1 kHz signal is on and the I O and Acquisition boards are both active and functionally capable of performing an acquisition or one of those two modules is not performing correctly While many different possible frequencies exist all involve detected failures on the Acquisition or I O boards due to failure Signal at PROBE COMP 1 kHz signal no display Signal other than 1 kHz No signal Possible problem Troubleshoot the display Troubleshoot the Acquisition board Troubleshoot the power supply Accessing the error log Failures that occur during the power up diagnostics or normal oscilloscope operation place an entry in the error log The error log list can be accessed any time by pushing the UTILITY button and selecting Options gt Error Log The following table lists the error codes Table 6 2 List of error codes No ID Description Probable cause 0 Battery Battery 1 alarm Battery hardware failure replace 1 Battery Battery 2 alarm battery If errors persist contact Tektronix 2 Battery PIC Communication May occur sporadically during 3 Battery PIC HW Failure normal operation If errors occur repeatedly a
58. ine Wave Generator 50 1 MHz 1 40 Sine Wave Generator 50 0 50 kHz 1 2 41 Sine Wave Generator 50 Q 20 MHz 1 2 Vp p 42 Sine Wave Generator 50 0 BWL 30 mV 43 Sine Wave Generator 50 0 BWL 60 mV 44 Sine Wave Generator 50 BWL 120 45 Sine Wave Generator 50 0 BWL 300 46 Sine Wave Generator 50 0 BWL 600 47 Sine Wave Generator 50 0 BWL 1 2 48 Sine Wave Generator 50 0 5 kHz 2 5 49 Sine Wave Generator 50 Q 1 MHz 2 5 Vo 50 Sine Wave Generator 50 0 50 kHz 2 5 Vp p 51 Sine Wave Generator 50 0 20 MHz 2 5 Vp p 52 Sine Wave Generator 50 0 BWL 2 5 Vo 53 Sine Wave Generator 50 BWL 5 Vo 54 Sine Wave Generator 50 BWL 1 6 Vp p 55 Edge 50 Q 1 kHz 0 to 800 mV fast rising edge TPS2000B Series Digital Storage Oscilloscopes Service Manual Adjustment Procedures Table 5 2 Adjustments steps 73 108 are for 4 CH models only cont Procedure steps Signal Signal source setting Input Refer to the Edge setup diagram 56 Sine Wave Generator 50 0 5 kHz 1 CH2 57 Sine Wave Generator 50 0 1 MHz 100 mV 58 Sine Wave Generator 50 1 MHz 1 Vp p 59 Sine Wave Generator 50 0 50 kHz 1 2 Vp p 60 Sine Wave Generator 50 0 20 MHz 1 2 Vp 61 Sine Wave Generator 50 BWL 30 mV 62 Sine Wave Generator 50 0 BWL 60 mV 63 Sine Wave Generator 50
59. istic Description Type System supports 2 type NI2040 Li lon Battery Packs Nominal Capacity 6600 mAH Battery Life 5 5 hours per battery 2 channel models 4 5 hours per battery 4 channel models 300 charge discharge cycles Battery will still have 80 of rated capacity after 300 charge cycles Charge time nominal Instrument nonoperating 4 5 hours Instrument operating 6 5 hours External DC Input Table 1 6 External DC input Characteristic Description Voltage 15 V 1 V The input is not protected from the electrically harsh automobile electrical system Operation from a vehicle requires a specifically designed external power supply Current consumption Connector type Typical Power draw from External DC input 2 channel models charging a battery 21 W 2 channel models no battery 13 W 4 channel models charging a battery 30 W 4 channel models no battery 18 W Charging only instrument OFF 28 W Maximum power draw from AC line by AC Adapter 36 watts 2 5 mm male Use a mating connector with a 2 5 mm barrel hole Center conductor positive Outer conductor negative External Interfaces Table 1 7 External interfaces Characteristic Description Interfaces for data communication and probe compensation RS 232 Parallel port Compact flash Probe compensation Probe Compensator output voltage typical 5 V p p 10 into 21 MO load Probe Compensator output frequency
60. m with differences noted as necessary At a minimum the Acquisition board contains the following components Attenuators m ASIC amplifier Isolation circuit Digitizer trigger system ASIC Signal processing display system services ASIC RAM FLASH ROM B Microprocessor Internal peripheral interface B Power supplies For a four channel oscilloscope the attenuators and ASICs are duplicated Most of the other aspects of the circuitry are the same as for the two channel oscilloscope Signals from the CH 1 CH 2 and other input connectors pass through attenuators and an AC coupling switch to the amplifier ASIC The EXT TRIG input uses an abbreviated version of this path without some of the attenuator settings and the AC coupling switch The amplifier ASIC contains buffers and variable gain amplifiers as well as filters that provide 20 MHz bandwidth limiting The task of the amplifier ASIC is to convert from a 1 MQ single ended environment in the input to a much lower impedance differential and thus less noise sensitive environment for the isolation and acquisition process The amplifier ASIC assures that the input signal is amplified to approximately the correct level to allow the fullest possible use of the isolation circuit and digitizer The isolation circuit uses a modulation clock to transfer the input signal across the isolation boundary via an isolation transformer The input signal is demodulated and sent to the
61. maximum battery life span Use only Tektronix approved batteries in your Tektronix products Do not leave batteries unused for extended periods of time either in the product or in storage When a battery has not been used for six months check the charge status and charge or dispose of the battery as appropriate The typical estimated life of a Lithium Ion battery is about two to three years or approximately 300 charge cycles whichever occurs first One charge cycle is a period of use from fully charged to fully discharged and fully recharged again Use a two to three year life expectancy for batteries that do not run through complete charge cycles Rechargeable Lithium Ion batteries have a limited life and will gradually lose their capacity to hold a charge This loss of capacity aging is irreversible As the battery loses capacity the length of time it will power the product run time decreases Lithium Ion batteries continue to slowly discharge self discharge when not in use or while in storage Routinely check the battery charge status Check the latest TPS2000B user manual for information on how to check battery status and for battery charging instructions The latest TPS2000B manuals are available at www tektronix com manuals TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Battery Maintenance Pay attention to these points when monitoring Lithium Ion batteries Observe and note the run time tha
62. months NOTE The battery self discharges during storage Higher temperatures above 20 C or 68 F reduce the battery storage life AN CAUTION Ifa battery is stored or otherwise unused for an extended period without following these instructions and the battery has no charge remaining when you check it consider it to be damaged Do not attempt to recharge it or to use it Replace it with a new battery TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 27 Maintenance Handling Precautions A Transportation Disposal 6 28 and Recycling Pay attention to the following when handling batteries Do not disassemble open crush bend deform puncture or shred a battery Do not drop a battery or expose the battery to excessive shock or vibration Do not short circuit a battery or allow metallic or conductive objects to contact the battery terminals Do not dispose of a battery in fire or water Do not use the battery to power any devices other than the instrument for which it was designed Keep the battery away from personnel that are not trained to use the instrument Do not expose a battery to temperatures above 60 C 140 F Keep the battery away from children Do not use a damaged battery If a battery pack is leaking fluids do not touch any fluids Properly dispose of a leaking battery pack see Disposal and Recycling in this document WARNING Eye contact with battery fluids
63. nd check that triggering is stable 12 Change the oscilloscope setup using the following step Press menu button Select menu option Select setting TRIGGER Slope Falling 13 Press SET LEVEL 50 Adjust TRIGGER LEVEL as necessary and check that triggering is stable 14 Disconnect the test setup 15 Repeat steps 1 through 14 until all input channels have been checked Check External Edge This test checks the edge trigger sensitivity for the external trigger Trigger Sensitivity 1 Set up the oscilloscope using the following steps Press menu button Select menu option Select setting DEFAULT SETUP Channel 1 Voltage Probe 1X TRIGGER Source Ext Mode Normal ACQUIRE Sample MEASURE Source CH1 Type Pk Pk 2 Connect the oscilloscope to the leveled sine wave generator as shown in the following figure TPS2000B Series Digital Storage Oscilloscopes Service Manual 4 11 Performance Verification Leveled sine wave Digitizing oscilloscope generator Lai 0 006 oo a 00000 ADO O c O al OOO C O0 en o DIO Ae x Power divider 39 Male SMA to feedthrough So female BNC 3Pj terminator T ieces n SMA female to female 3 Setthe leveled sine wave generator frequency to the following 100 MHz if you are checking a TPS2012B TPS2014B
64. nstallation Procedures provides procedures for the removal and installation of modules Troubleshooting provides information for isolating failed modules Repackaging Instructions provides packaging information for shipment or storage Preparation Only qualified personnel should perform service procedures Read the Service Safety Summary and the General Safety Summary sections of this manual before performing any service procedures Also refer to the Operating Information section and your oscilloscope user manual for information about using the oscilloscope Preventing ESD When performing any service that requires internal access to the oscilloscope adhere to the following precautions These precautions will help you avoid damaging internal modules and their components due to electrostatic discharge ESD CAUTION Static discharge can damage any semiconductor component in this oscilloscope Minimize handling of static sensitive modules m Transport and store static sensitive modules in their static protected containers or on a metal rail Label any package that contains static sensitive modules m Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 1 Maintenance B Service static sensitive modules only at static free workstations Do not allow anything capable of generating or holding
65. on 0 15 475 mV 19 525 mV Accuracy f Vertical Position 17 6 mV 31 3 mV 38 7 mV 200 mV div Vertical Position 0 658 mV 742 mV Vertical Position 704 mV 1 33 V 1 47 V 2 V div Vertical Position 0 6 589 V 7 411 V Vertical Position 7 04 V 13 27 V 14 73 V 5 mV div Vreg Vertical Position 0 19 525 mV 15 475 Vertical Position 17 6 mV 38 7 V 31 3 V 200 mV div Vertical Position 0 742 mV 658 mV Vertical Position 704 mV 1 47V 1 33 V 2 Vidiv Vertical Position 0 7411 6 589 V Vertical Position 7 04 V 14 73 V 13 27 V Channel 3 5 mV div DC Measurement Vertical Position 0 15 475 mV 19 525 mV Accuracy Vertical Position 17 6 mV 31 3 mV 38 7 mV 200 mV div Vertical Position 0 658 mV 742 mV Vertical Position 704 mV 1 33 V 147 V 2 Vidiv Vertical Position 0 6 589 V 7 411 V Vertical Position 7 04 V 13 27 V 14 73 V 5 mV div Vreg Vertical Position 0 19 525 mV 15 475 mV Vertical Position 17 6 mV 38 7 V 31 3 V 200 mV div Vertical Position 0 742 mV 658 mV Vertical Position 704 mV 147V 1 33 V 2 Vidiv Vertical Position 0 7411 6 589 V Vertical Position 7 04 V 14 73 V 13 27 V TPS2000B Series Digital Storage Oscilloscopes Service Manual 4 3 Performance Verification Oscilloscope tests Low limit Test result High limit Channel 4 5 mV div DC Measurement Vertical Position 0 15 475 mV 19 525 mV
66. on operation If the ambient temperature changes by more than 5 C you must perform the Self Calibration operation again The time required to complete the entire procedure is approximately one hour N WARNING Some procedures use hazardous voltages To prevent electrical shock always set voltage source outputs to 0 V before making or changing any interconnections Self Test This internal procedure is automatically performed every time the oscilloscope is powered on No test equipment or hookups are required Verify that no error messages are displayed before continuing with this procedure Self Calibration self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy You can run the routine at any time but you should always run the routine if the ambient temperature changes by 5 C or more 1 Remove signals from all channels 2 Push the UTILITY button and select the Do Self Cal option to start the calibration This routine can take up to five minutes to complete 3 Verify that instrument passed self calibration Check DC Gain Accuracy This test checks the DC gain accuracy of all input channels 1 Setthe DC voltage source output level to 0 V 2 Setup the oscilloscope using the following steps Press menu button Select menu option Select setting DEFAULT SETUP Channel 1 Voltage Probe 1X ACQUIRE Average 64 MEASURE Source Channel 1 Type Me
67. orage Oscilloscopes Service Manual 1 3 Specifications Table 1 2 Time base system cont Characteristic Description Position Range 2 5 ns div to 10 ns div 4 divx s div to 20 ms 25 ns div to 100 ms div 4 div x s div to 50 ms 250 us div to 10 s div 4 div x s div to 50 s 25 s div to 50 s div 4 divx s div to 250 s Delta Time Measurement Accuracy Full Bandwidth Conditions Accuracy Single shot sample mode 1 sample interval 100 ppm x reading 0 6 ns gt 16 averages 1 sample interval 100 ppm x reading 0 4 ns The limits apply for signals having amplitude gt 5 divisions slew rate at the measurement points of gt 2 0 divisions ns and acquired gt 10 mV Div Sample interval is the time between the samples in the waveform record Triggering System Table 1 3 Triggering system Characteristic Description Holdoff Range 500 ns to 10 s The ability to set large values of Holdoff is limited by the difficulty in adjusting the Holdoff at Sec Div settings less than 100 ms div This is because Holdoff cannot be set in Scan Mode which begins at 100 ms div when Trigger Mode is AUTO By adjusting Trigger Mode to NORMAL the Scan Mode operation is turned off and Holdoff can be adjusted at larger Sec Div settings External Trigger Input Impedance 1 M 2 in parallel with 20 pF 3 pF External Trigger Maximum Input Voltage 300 Vrus CAT 1 and CAT 150 Vr
68. ot move around inside of the carton when sealed If the oscilloscope is being shipped to a Tektronix Service Center enclose the following information The owner address m Name and phone number of a contact person B Type and serial number of the oscilloscope Reason for returning A complete description of the service required Seal the shipping carton with an industrial stapler or strapping tape Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations Store the oscilloscope in a clean dry environment The following characteristics apply to both shipping and storage oscilloscope not operating NOTE Remove the battery and store it separately from the oscilloscope See the battery storage recommendations See page 6 27 Storage TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 29 Maintenance EB Temperature range 20 C to 60 C Altitude To 15 000 m See Specifications for a complete list of the environmental characteristics 6 30 TPS2000B Series Digital Storage Oscilloscopes Service Manual Diagrams Diagrams This section describes the electrical operation of the TPS2000B Series oscilloscope using the major circuit blocks The following figure shows the oscilloscope interconnections used in the four channel version Display Adapter Preamp board and TFT Attenuator Active LCD ADG420 p Optocoupler typ Probe
69. ponents and assemblies in an oven or drying compartment using low temperature 52 C to 66 C 125 F to 150 F circulating air Lubrication Periodic lubrication is not required for the oscilloscope TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance Removal and Installation Procedures This section describes how to remove and install the major mechanical and electrical modules of the oscilloscope Preparation WARNING Only qualified personnel should perform service procedures Before doing this or any other procedure in this manual read the General Safety Summary and Service Safety Summary found at the beginning of this manual Always disconnect the power cord before disassembling any part of the oscilloscope To prevent damage to electrical components read Preventing ESD See page 6 1 Preventing ESD The exploded view diagram gives an overview of how the entire oscilloscope is assembled See Figure 8 1 The Replaceable Parts section lists all of the replaceable modules See page 8 1 Replaceable Parts If you are disassembling the oscilloscope for cleaning refer to Inspection and Cleaning for cleaning instructions See page 6 2 Required Tools Use the following tools to remove and replace modules in the oscilloscope Torque limiting screwdriver long shank 8 in lb 85 N m range with Torx T 15 tip Torque limiting screwdriver with Torx T 8 tip m 16mm 5 8 inch d
70. quisition board Install the seven screws that attach the Acquisition board to the chassis Connect the Display cable at J201 the other end is connected to J401 on the Display Adapter board Install the I O board See page 6 10 Board Install the plastic BNC shells on the BNC connectors TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 11 Maintenance Display Adapter Board 8 Use the 16 mm 5 8 inch deep socket and install the BNC nuts on the BNC connectors Torque the nuts to 40 in Ibs using the torque wrench 9 Install the BNC cover on the front case 10 Install the rear case 11 Install the front panel knobs E lt Acquisition board i screws 6 Pull up gently to disconnect J2100 BNC cover Figure 6 3 Using a screwdriver to remove the Acquisition board You will need T15 screwdriver for this procedure Removal To remove the Display Adapter board follow these steps TPS2000B Series Digital Storage Oscilloscopes Service Manual e Maintenance Refer to the exploded view and the rear panel locator diagram See Figure 6 2 on page 6 10 See Figure 8 1 on page 8 6 Remove the rear case and fan See page 6 7 Rear Case See page 6 9 Fan Remove the Acquisition board See page 6 11 Acquisition Board Remove the Display module See page 6 17 Display Module Disconnect all cables except the LCD data cable from the Displ
71. r all V div settings 5 mV div and above for operating temperatures from 40 C to 50 C Analog Bandwidth in Peak Detect mode 50 s div to 5 ms div DC coupled typical DC to 275 MHz for all V div settings with bandwidth limit at full Lower Frequency Limit AC Coupled 10 Hz at BNC lt 1 Hz when using a 10X passive probe TPS2000B Series Digital Storage Oscilloscopes Service Manual Specifications Table 1 1 Signal acquisition system cont Characteristic Description Rise Time at BNC typical TPS2012B and TPS2014B TPS2024B lt 3 5 ns lt 2 1 ns Rise time is generally calculated from the following formula Rise time in ns 350 Bandwidth in MHz Peak Detect Response Captures 50 or greater amplitude of pulses 212 ns wide typical 50 s div to 5 us div in the center 8 vertical divisions Vertical Position Range 2 mV div to 200 mV div 1 8 V gt 200 mV div to 5 V div 45 V Vertical Position Accuracy 2 mV div to 200 mV div 1 x selected value 0 1 div 2 mV within the range 1 8 V gt 200 mV div to 5 V div 1 x selected value 0 1 div 50 mV within the range 45 V Single Channel Common Mode Rejection typical Greater than 1000 1 up to 50 MHz derated to 400 1 at 200 MHz Sine wave with VOLTS DIV setting at 5 mV Signal applied between the channel signal and signal reference and chassis Ratio of the acquired signal amplitude to the amplitude of the signal
72. rovide proper ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product The following symbol s may appear on the product A b CAUTION Refer to Manual Chassis Ground Standby TPS2000B Series Digital Storage Oscilloscopes Service Manual Service Safety Summary Service Safety Summary Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service procedures Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or c
73. rt was first effective Column four indicates the serial number at which the part was discontinued No entries indicates the part is good for all serial numbers 5 Qty This indicates the quantity of parts used 6 Name 4 An item name is separated from the description by a colon Description Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification Abbreviations Abbreviations conform to American National Standard ANSI Y1 1 1972 8 2 TPS2000B Series Digital Storage Oscilloscopes Service Manual Table 8 2 Replaceable parts list Replaceable Parts Fig amp index Tektronix Serial no Serial no number part number effective discont d Qty Name amp description 8 1 1 441 2637 00 1 CHASSIS 2 CH 441 2638 00 1 CHASSIS 4 CH 2 211 1432 00 4 SCREW M3 0X30MM FLAT HEAD FAN ATTACHING 3 210 1607 00 4 SPRING WASHER M3 FAN ATTACHING 4 210 1608 00 4 PLAIN WASHER M3 FAN ATTACHING 5 119 6965 00 1 FAN DC TUBEAXIAL 12 VDC 170 MA 4200 RPM 32 DBA 19 CFM 60 X 60 MM X 25 MM UL CSA TUV SAFETY CONTROLLED 6 220 0293 00 4 THRU HOLE THREAD STANDOFFS 3 5M3 LENGTH 18MM 7 878 0392 00 1 CIRCUIT BOARD SUBASSY DISPLAY ADAPTER BOARD 8 174 5861 00 1 CABLE 33 PIN PITCH 0 5MM DISPLAY DATA CABLE 9 174 4949 01 1 CABLE ASSY 011061 28 AWG v6 0 L 1
74. rty environment To inspect and clean the interior disassemble the oscilloscope by completing each of the disassembly procedures in the order given See page 6 5 Removal and Installation Procedures Inspect the internal portions of the oscilloscope for damage and wear using the following table as a guide Repair defects immediately Table 6 1 Internal inspection checklist Item Inspect for Repair action Cracks or deformations Scratched lettering or display filter Loose connectors or labels Front and Rear Case Repair or replace defective hardware Loose broken or corroded solder connections Burned circuit boards Burned broken or cracked circuit run plating Circuit boards Remove failed module and replace with a new module Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Wiring and cables Loose plugs or connectors Burned broken or frayed wiring Firmly seat connectors Repair or replace modules with defective wires or cables TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 3 Maintenance 6 4 Cleaning procedure interior To clean the oscilloscope interior perform the following 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 wipe with a lint free cloth dampened
75. s the trailing edge Greater than also called time out trigger The oscilloscope triggers when a pulse continues longer than the time specified as the Pulse Width Pulse Width Range Selectable from 33 ns to 10 5 Pulse Width Resolution Equal Guard Band 16 5 ns or 1 part per thousand whichever is larger t gt 330 ns 5 lt guard band lt 5 1 16 5 ns lt 330 ns guard band 16 5 ns Not Equal Guard Band t gt 330 ns 5 lt guard band lt 5 1 16 5 ns 165 ns t 330 ns guard band 16 5 ns 33 ns t 165 ns guard band 16 5 ns Trigger Frequency Counter Readout Resolution 6 digits Accuracy typical 51 ppm including all frequency reference errors and 1 count errors TPS2000B Series Digital Storage Oscilloscopes Service Manual Specifications Table 1 3 Triggering system cont Characteristic Description Frequency Range AC coupled 10 Hz minimum to rated bandwidth Signal Source Pulse Width Edge Trigger all available trigger sources Frequency Counter measures trigger source at all times including when the oscilloscope acquisition is halted due to changes in the run status or acquisition of a single shot event has completed Pulse Width Trigger The oscilloscope counts pulses of significant magnitude inside the 250 ms measurement window that qualify as triggerable events such as narrow pulses in a PWM pulse train if set to lt mode and the
76. shooting tree page 1 4 0 4 0 0 2 6 21 Figure 6 10 Oscilloscope troubleshooting tree page 2 4 2 2 2 6 22 Figure 6 11 Oscilloscope troubleshooting tree page 3 4 6 23 Figure 6 12 Oscilloscope troubleshooting tree page 4 4 6 24 Figure 7 1 TPS2000B Series block diagram 2 2 7 1 Figure 8 1 Exploded view 8 6 TPS2000B Series Digital Storage Oscilloscopes Service Manual ili Table of Contents List of Tables iv Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 1 6 Table 1 7 Table 1 8 Table 1 9 Table 4 1 Table 4 2 Table 5 1 Table 5 2 Table 6 1 Table 6 2 Table 8 1 Table 8 2 Signal acquisition 1 1 TIME base systeme ciraire as Helene ta 1 3 Triggering system 1 4 Display sis nein 1 7 EET 1 7 IACULIS PE 1 8 External de ui HL Une 1 8 Mechanical 1 2 22222 1 9 ee eese 1 9 Required equipment elle le bilden 4 1 A RR 4 2 Required equipment
77. t a new fully charged battery provides for powering your product Use this new battery run time as a basis to compare run times for older batteries The run time of your battery will vary depending on the product configuration and the applications that you run m Routinely check the battery charge status Carefully monitor batteries that are approaching the end of their estimated life Consider replacing the battery with a new one if you note either of the following conditions battery run time drops below about 80 of the original run time The battery charge time increases significantly Charging Always follow the charging instructions provided with your product Refer to your product user manual and or online help for detailed information about charging its battery The latest version of your Tektronix product user manual is available at www tektronix com NOTE When you troubleshoot battery issues for dual battery configurations only one battery pack should be installed You need to test one battery pack and one battery slot at a time Storage Follow these recommendations when storing a Lithium Ion battery m Charge or discharge the battery to approximately 50 of capacity before storage m Remove the battery and store it separately from the product B Store the battery at temperatures between 5 C and 20 C 41 F and 68 F Charge the battery to approximately 50 of capacity at least once every six
78. t case follow these steps See Figure 6 5 1 Place the front case face down on a soft surface 2 Verify that the switch keypad is aligned and feeds through the front case Follow the keypad installation procedure See page 6 19 Installation TPS2000B Series Digital Storage Oscilloscopes Service Manual Maintenance 3 Align the power switch BNC connectors and knob shafts so they feed through the front case 4 Lower the chassis onto the front case 5 Install the four screws the inside of the chassis that attach the chassis to the front cover See Figure 6 5 6 Follow the procedure to install the rear case See page 6 7 Installation 7 Install the plastic BNC shells on the BNC connectors 8 Use the 16 mm 5 16 inch deep socket and install the BNC nuts on the BNC connectors Torque the nuts to 40 in lbs using the torque wrench 9 Install the BNC cover and front panel knobs Front case a screws 4 EN Plastic BNC shell 0 625 BNC nut BNC cover Figure 6 5 Removing the front case TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 15 Maintenance Front Panel Board 6 16 You will need torque limiting Torx 15 screwdriver for this procedure Removal To remove the Front Panel board follow these steps See Figure 6 6 1 Remove the front case See page 6 14 Front Case 2 Remove the five screws that attach the Front Panel board to th
79. teries CAUTION Avoid cross threading the screws that attach the rear case to the front case An easy way to avoid this is to slip the screw into the hole and using slight pressure slowly rotate the screw counterclockwise until you feel the screw slip into the screw threads Then tighten the screw clockwise A properly started screw will give very little resistance going in TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 7 Maintenance 7 Plugs 2 4 Rear case screws 5 Rear case Figure 6 1 Removing and installing the rear case TPS2000B Series Digital Storage Oscilloscopes Service Manual 6 8 Maintenance Fan You will need the T15 screwdriver for this procedure Removal To remove the fan follow these steps See Figure 6 2 on page 6 10 1 Remove the rear case See page 6 7 Rear Case 2 Disconnect the fan cable from the IO board 3 Remove the four screws with washers and the four standoffs that attach the fan to the chassis Keep the screws washers and standoffs to use when installing the new fan 4 Remove the fan Installation To install a new fan follow these steps See Figure 6 2 1 Align the fan bracket with the fan Align the fan so that air blows out the side of the chassis not into the chassis 2 Install the four standoffs four flat washers four spring washers and four screws to attach the fan to the chassis 3 Install the fan
80. the waveform is placed into a display buffer At the same time the waveform is being read from the display buffers and written to the LCD Additional circuitry in the display ASIC supports scanning of the front panel provides DRAM refresh processes the clock and performs various memory mapping tasks required by all elementary microprocessor based systems In a four channel system the two display ASICs are interconnected so that one ASIC may provide display information for the second The processing and display system handles some of the computational tasks Other tasks are performed by the processor system Since all array processing is performed in the processing and display system no computations can be performed that involve data from two different channel sets Thus subtracting channel 3 data from channel 2 is prohibited Probe Compensation The PROBE COMP and ground terminals are provided for probe adjustment Acquisition Board Power The IO board supplies the Acquisition board with 5 0 3 0 3 3 and 15 These sources are used directly or as sources for other converters on the Acquisition board The Acquisition board supplies 35 volts used for series strings of LEDs on the front panel for button illumination TPS2000B Series Digital Storage Oscilloscopes Service Manual 3 3 Theory of Operation Power Supply and Battery System Display Module Front Panel Two Channel Oscilloscopes Four Channel Oscilloscopes 3 4
81. ting ESD section before removing or installing the Acquisition board See page 6 1 Preventing ESD Removal To remove the Acquisition board follow these steps See Figure 6 3 on page 6 12 1 2 Remove the rear case See page 6 7 Rear Case Remove the BNC cover by prying up on the exposed edge See Figure 6 3 on page 6 12 Use the 16 mm 5 8 inch deep socket to remove the nuts from the BNC connectors Remove the plastic BNC shells from the BNC connectors Hold the BNC shell with your fingers and pull up to remove the shell Remove the I O board See page 6 10 Board Note how the Display cable at J201 is routed under the corner of the Acquisition board so that you can reinstall it the same way Disconnect the Display cable from J201 leave the other end connected to J401 on the Display Adapter board Remove the seven screws that attach the Acquisition board to the chassis Use the flat blade screwdriver to pull up on the edge of the board and unseat the connection between the Acquisition board and the Compact Flash board 10 Lift up and remove the Acquisition board Installation To install the Acquisition board follow these steps See Figure 6 3 on page 6 12 1 W N m Position the Acquisition board over the chassis and align the feedthrough connector on the front panel and compact flash boards Push down to seat the connector Route the Display cable under the corner of the Ac
82. uires an external voltage source for new calibration constants Before performing the adjustment procedure you must warm up the oscilloscope for at least ten minutes in an ambient temperature between 20 C and 30 C Adjustments performed before warm up or outside this temperature range may result in poor performance If all steps in the procedures are completed successfully a Pass message is displayed and the new calibration constants take effect If any step fails the procedure is aborted and the current calibration is not affected You can choose to abort the procedures at any step by selecting FCAL ABORT without affecting the current calibration NOTE While performing the adjustment procedure keep in mind that some of the steps take a significant amount of time up to 5 minutes to complete You must enable the Service menu to perform the adjustment procedure Power on the oscilloscope Push the front panel MEASURE button to access the MEASURE menu Push the top option button to access the Measure 1 menu Push and hold the front panel SINGLE SEQ button Push and hold the front panel AUTOSET button Wait at least two seconds Release the SINGLE SEQ button gs ge Release the AUTOSET button A message appears in the lower left corner of the screen stating Service mode ON 9 Push the front panel UTILITY button The last item in the Utility menu is now Service You may now begin executing the s
83. urrents 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 TPS2000B Series Digital Storage Oscilloscopes Service Manual vii Service Safety Summary vili TPS2000B Series Digital Storage Oscilloscopes Service Manual Preface This service manual for the TPS2000B Series Digital Storage Oscilloscopes provides instructions to verify the performance of calibrate troubleshoot and repair the oscilloscopes to the module level Unless noted otherwise the term oscilloscope refers to all of the models in the TPS2000B Series Products This manual covers the following products TPS2012B Digital Storage Oscilloscope m TPS2014B Digital Storage Oscilloscope m TPS2024B Digital Storage Oscilloscope Related Manuals These manuals contain additional documentation for the oscilloscopes They are available at www tektronix com manuals Programmer manual part Language User manual part number number English 071 2733 XX 077 0444 French 071 2734 1 Italian 071 2735 1 German 071 2736 1 Spanish 071 2737 1 Japanese 071 2738 1 Portuguese 071 2739 1 Simplified Chinese 071 2740 1 Traditional Chinese 071 2741 1 071 1450 1 Russian 071 2743 1 1 These manuals contain a langua
84. us CAT III At front panel connector signal input to BNC shell 300 V rus derate at 20 dB decade above 100 kHz to 13 V peak AC at 3 MHz and above Based upon sinusoidal or DC input signal For nonsinusoidal waveforms peak value must be less than 420 V Excursion above 300 V should be less than 100 ms duration RMS signal level must be limited to 300 V If these values are exceeded damage to the instrument may result Input is rated 300 V CAT Il signal to floating common External Trigger Maximum Float Voltage Rated 600 V CAT Il Instrument chassis is normally considered to be at earth ground Between instrument chassis and BNC shell TPS2000B Series Digital Storage Oscilloscopes Service Manual Specifications Table 1 3 Triggering system cont Characteristic Description Trigger Sensitivity Edge Trigger Trigger Source Sensitivity Type DC Coupled All products 1 div from DC to 10 MHz TSP2012B 1 5 div from 10 MHz to 100 MHz TPS2014B TSP2024B 1 5 div from 10 MHz to 100 MHz 2 div from 100 MHz to 200 MHz EXT 1 Vp p from 50 Hz to 100 MHz 2 Vy from 100 MHz to 200 MHz EXT 5 5X the value of EXT 10 10X the value of EXT Trigger Sensitivity Edge Trigger Type typical The minimum signal levels required for stable edge triggering of an acquisition when the trigger Source is DC coupled A stable trigger is one that results in a uniform regular visual display triggered on the selected slope
85. width is set to a relatively small time Edge Trigger The oscilloscope counts all edges of sufficient magnitude and correct polarity Video Trigger The Frequency Counter does not operate 1 Available only on 4 channel oscilloscopes 2 TPS2024B only Display Table 1 4 Display Characteristic Description Type 11 5 cm W x 8 64 cm 14 38 cm diagonal Y VGA active TFT color liquid crystal display LCD with color characters waveforms on a black background Surface anti glare 3H treatment Resolution 320 horizontal by 240 vertical pixels Brightness typical 400 typical 320cd m2 min Backlight Intensity Three strings of 5 LEDs in series Variable minimum is 14 85 V 1 Variable maximum is 18 15 V 1 Typical current is 25 mA for each of the three strings 1 Available through the display menu Batteries Table 1 5 Batteries Characteristic Description Real Time Clock Battery Real Time Clock Battery The battery maintains time of day information when the oscilloscope is powered off The battery is sized to provide 5 years of service life The estimated time that the clock will remain powered from the battery is 5 years Environmental conditions especially humidity affect the number The battery is not user replaceable Li lon Battery Packs TPS2000B Series Digital Storage Oscilloscopes Service Manual 1 7 Specifications Table 1 5 Batteries cont Character
86. witch or encoder position For the encoders some amount of debouncing occurs inside the front panel IC All key debouncing is handled in the display ASIC on the Acquisition board The Front Panel board for four channel oscilloscopes is effectively two front panels in parallel The left side of the board is largely handled by the display ASIC for channels 1 and 2 The right side of the board is handled by the channel 3 and 4 ASIC Separate front panel ICs support these data paths TPS2000B Series Digital Storage Oscilloscopes Service Manual Theory of Operation LEDs The front panel contains three LEDs that light to indicate when the Save Autorange controls or the multipurpose knob are active In addition most buttons have an LED behind them for illumination in low light conditions Button illumination can be turned off in the Utility menu Internal Peripherals The Acquisition board includes an FPGA that manages communication between the microprocessor and the internal program memory FLASH RTC Real Time Clock battery system and temperature sensor The temperature sensor is used for fan control External Peripherals Acquisition board FPGA also manages communication between the microprocessor and external RS 232 port Printer Port and Compact FLASH Card TPS2000B Series Digital Storage Oscilloscopes Service Manual 3 5 Theory of Operation 3 6 TPS2000B Series Digital Storage Oscilloscopes Service Manual Performance
87. with warm deionized water A cotton tipped applicator is useful for cleaning in narrow spaces and on circuit boards NOTE If after performing steps 1 and 2 a module is clean upon inspection skip steps 3 and 4 Proceed with step 5 If steps 1 2 do not remove all of the dust or dirt all modules in the oscilloscope except the Display Module and Front Panel Module may be spray washed using a solution of 75 isopropyl alcohol Extensive cleaning of the Display Module is difficult because water must not be trapped between the display shield and the display The polarizers integrated into the display degrade with long term exposure to water The display shield and display must be replaced as an assembly if significant moisture or debris becomes trapped inside Cotton tipped applicators and lint free rags moistened in isopropyl alcohol and or deionized water offer the best cleaning with the least opportunity for damage to the assembly The Front Panel Module can be damaged by deposition of film or debris inside the knob encoders To avoid this care must be taken to not drip liquid or blow debris into the encoders Proceed with step 3 3 Spray wash dirty parts with the 75 isopropyl alcohol solution and wait 60 seconds for the majority of the alcohol to evaporate 4 Use hot 49 C to 60 C 120 F to 140 F deionized water to thoroughly rinse the parts 5 Dry all parts with low pressure deionized air 6 Dry all com

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