Page 3 - WARRANTY
WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) yearsfrom the date of purchase from an authorized Tektronix distributor. If any such product proves defective during thiswarranty period, Tektronix, at its option, either wi...
Page 4 - Service Assurance; Service Assurance Advantages
Service Assurance If you have not already purchased Service Assurance for this product, you may do so at any time during the product’swarranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs. Repair Protection extends priority repair services beyond t...
Page 5 - Table of Contents
THS710A, THS720A, THS730A & THS720P Service Manual i Table of Contents General Safety Summary v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface ix . . . . . . . . ...
Page 6 - ii; Options; Electrical Parts List; Diagrams; Diagrams
Table of Contents ii THS710A, THS720A, THS730A & THS720P Service Manual Options Options 7–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Parts List Electrical Parts List 8–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 7 - iii; List of Figures
Table of Contents THS710A, THS720A, THS730A & THS720P Service Manual iii List of Figures Figure 2–1: Removing and replacing the battery 2–2 . . . . . . . . . . . . . . . . . Figure 2–2: AC adapter attachment 2–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2–3: Typical scope-mode...
Page 8 - iv; List of Tables
Table of Contents iv THS710A, THS720A, THS730A & THS720P Service Manual List of Tables Table 1–1: Oscilloscope specifications 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . Table 1–2: DMM specifications 1–8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1–3: General s...
Page 9 - General Safety Summary; Only qualified personnel should perform service procedures.; To Avoid Fire or
THS710A, THS720A, THS730A & THS720P Service Manual v General Safety Summary Review the following safety precautions to avoid injury and prevent damage tothis product or any products connected to it. To avoid potential hazards, use thisproduct only as specified. Only qualified personnel should pe...
Page 10 - in injury or loss of life.; Terms on the Product.; Symbols and Terms
General Safety Summary vi THS710A, THS720A, THS730A & THS720P Service Manual Terms in this Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or p...
Page 11 - vii; Service Safety Summary; Do Not Service Alone.; Do not perform internal service or adjustments of this; Use Care When Servicing With Power On.; Dangerous voltages or currents may
THS710A, THS720A, THS730A & THS720P Service Manual vii Service Safety Summary Only qualified personnel should perform service procedures. Read this ServiceSafety Summary and the General Safety Summary before performing any serviceprocedures. Do Not Service Alone. Do not perform internal service ...
Page 12 - viii
Service Safety Summary viii THS710A, THS720A, THS730A & THS720P Service Manual
Page 13 - ix; Preface; Related Manuals; Language
THS710A, THS720A, THS730A & THS720P Service Manual ix Preface This is the Service Manual for the THS710A, THS720A, THS730A, andTHS720P TekScope instruments. This manual provides information to trouble-shoot and repair the instrument to the module level. Related Manuals Additional documentation f...
Page 14 - Conventions
Preface x THS710A, THS720A, THS730A & THS720P Service Manual Conventions In the Performance Verification, Adjustments, and Maintenance chapters of thismanual, TekScope instrument setups are shown in tables similar to the oneshown below. The header of each table contains icons that represent the ...
Page 16 - Specifications; symbol are checked in the chapter Performance Verification.; Table 1–1: Oscilloscope specifications; Acquisition; Inputs
THS710A, THS720A, THS730A & THS720P Service Manual 1–1 Specifications This chapter contains the oscilloscope, DMM, and general specifications for theTHS710A, THS720A, THS730A, and THS720P TekScope instruments. Allspecifications are guaranteed unless noted “typical.” Typical specifications arepro...
Page 18 - Vertical; Horizontal
Specifications THS710A, THS720A, THS730A & THS720P Service Manual 1–3 Table 1–1: Oscilloscope specifications (Cont.) Vertical DC Gain Accuracy ± 2% for Sample or Average acquisition mode Position Accuracy ± [0.4% × |(position × volts/div)| + (0.1 div × volts/div)] n DC Measurement A r y A er e M...
Page 19 - Internal Trigger; External Trigger
Specifications 1–4 THS710A, THS720A, THS730A & THS720P Service Manual Table 1–1: Oscilloscope specifications (Cont.) Internal Trigger Trigger Sensitivity, d e Tr er Type Coupling Sensitivity Edge Trigger Type, yp NOISE REJ 3.5 times the DC-coupled limits typical HF REJ 1.5 times the DC-coupled l...
Page 20 - Measurements
Specifications THS710A, THS720A, THS730A & THS720P Service Manual 1–5 Table 1–1: Oscilloscope specifications (Cont.) Measurements Cursors Voltage difference between cursors ( D V) Time difference between cursors ( D T) Reciprocal of D T in Hertz (1/ D T) Phase difference between cursors ( D Degr...
Page 23 - Table 1–2: DMM specifications; General
Specifications 1–8 THS710A, THS720A, THS730A & THS720P Service Manual Table 1–2: DMM specifications General Resolution 3 3 ⁄ 4 digit, 4000 count full scale reading except as noted Input Resistance, ACor DC Voltage 10 M ± 10% Input Capacitance,AC or DC Voltage,typical ≤ 100 pF Maximum Voltage e e...
Page 24 - AC Voltage
Specifications THS710A, THS720A, THS730A & THS720P Service Manual 1–9 Table 1–2: DMM specifications (Cont.) AC Voltage Conversion Type AC conversions are true RMS. The AC measurement is based on theAC and DC components of the signal as shown below: AC Measurement = RMS(AC+DC) – DC Ranges and Res...
Page 25 - Continuity Check; Table 1–3: General specifications; Display
Specifications 1–10 THS710A, THS720A, THS730A & THS720P Service Manual Table 1–2: DMM specifications (Cont.) /Resistance Open Circuit Voltage, yp Range Open Circuit Voltage typical 400.0 4.8 V All other ranges ≤ 1.2 V Continuity Check Indication An audible tone is generated when measured resista...
Page 26 - Probe Compensator Output
Specifications THS710A, THS720A, THS730A & THS720P Service Manual 1–11 Table 1–3: General specifications (Cont.) RS-232 Interface Device Type DTE. at RJ-45 connector Pinout Signal Pin Number at9-pin NullModem Adapter Pin Number atRJ-45 Connector RTS out 1 8 TXD out 2 6 RXD in 3 5 GND 5 4 DTR out...
Page 27 - Environmental; Mechanical
Specifications 1–12 THS710A, THS720A, THS730A & THS720P Service Manual Table 1–3: General specifications (Cont.) Environmental Temperature Operating –10 ° C to +50 ° C Nonoperating –20 ° C to +60 ° C Humidity +40 ° C or below ≤ 95% relative humidity +41 ° C to +50 ° C ≤ 75% relative humudity Alt...
Page 28 - Certifications and Compliances
Specifications THS710A, THS720A, THS730A & THS720P Service Manual 1–13 Table 1–3: General specifications (Cont.) Certifications and Compliances Certifications Listed UL3111-1 and CAN/CSA-C22.2 No. 1010.1-92, complies withEN61010-1 /A2 Overvoltage Category Category Examples CAT III A typical CAT ...
Page 31 - Operating Information; This chapter provides a quick overview of the following topics:; Internal and External Power Sources; Configuration; To avoid shock hazard, the battery door must remain closed in wet or; Using the Battery Pack
THS710A, THS720A, THS730A & THS720P Service Manual 2–1 Operating Information This chapter provides a quick overview of the following topics: H Internal and external power sources H Understanding the front panel H Connecting and using the probes For more detailed information about TekScope instru...
Page 32 - Operator Information; Figure 2–1: Removing and replacing the battery; To avoid shock hazard, the DC input and I/O port hole plugs must; Figure 2–2: AC adapter attachment; Using External Power
Operator Information 2–2 THS710A, THS720A, THS730A & THS720P Service Manual Battery pack Figure 2–1: Removing and replacing the battery For benchtop operation, you can use external power. Attach the AC adapteras shown in Figure 2–2. The DC INPUT disconnects itself if an overvoltage isapplied. If...
Page 33 - Understanding the Front Panel; Using Scope Mode
Operator Information THS710A, THS720A, THS730A & THS720P Service Manual 2–3 CAUTION. To avoid overheating, do not connect external power while the instrument is in a confined space, such as in the soft case. Understanding the Front Panel The SCOPE and METER buttons select the operating mode. The...
Page 34 - Using Meter Mode
Operator Information 2–4 THS710A, THS720A, THS730A & THS720P Service Manual Press the front-panel METER button to enter meter mode. Press one of the bezelbuttons to choose a meter function and then press AUTORANGE to set the rangeautomatically. A typical meter-mode display is shown in Figure 2–4...
Page 35 - Press a front-panel button to display the menu you want to use.; Using the Menu System
Operator Information THS710A, THS720A, THS730A & THS720P Service Manual 2–5 To use the menu system, follow the steps below: 1. Press a front-panel button to display the menu you want to use. 2. Press a bezel button to choose a menu item. If a pop-up menu appears, continue to press the bezel butt...
Page 37 - Using the Dedicated
Operator Information THS710A, THS720A, THS730A & THS720P Service Manual 2–7 You can use the dedicated buttons below to take direct actions. These buttons donot require the use of menus. 4 2 5 6 8 7 9 10 11 12 13 16 15 14 3 1 1. HARD COPY. Initiates a hard copy using the RS-232 port. 2. HOLD. Sto...
Page 38 - Connecting and Using the Probes; Figure 2–5: Connector locations
Operator Information 2–8 THS710A, THS720A, THS730A & THS720P Service Manual 14. CH 1, CH 2, MATH, REF A, REF B. Displays waveform and choosesselected waveform. In harmonics mode (THS720P), CH 1 and CH 2 alsodisplay harmonics of voltage and current waveforms; MATH displays powermeasurements. 15. ...
Page 39 - Connect the oscilloscope probe and then press AUTORANGE.; Compensating the
Operator Information THS710A, THS720A, THS730A & THS720P Service Manual 2–9 To maintain signal fidelity, you must compensate each voltage probe for thechannel input it is connected to. 1. Connect the oscilloscope probe and then press AUTORANGE. Probe tip to PROBE COMP Probe reference lead to Ch ...
Page 40 - Attaching the Reference
Operator Information 2–10 THS710A, THS720A, THS730A & THS720P Service Manual If you are using both of the oscilloscope channels, you must attach the probereference lead for each channel directly to your circuit. These attachments arerequired because the oscilloscope channels are electrically iso...
Page 42 - Theory of Operation; Main Board; Oscilloscope Signal Path
THS710A, THS720A, THS730A & THS720P Service Manual 3–1 Theory of Operation This chapter describes the electrical operation of the TekScope instrument to themodule level. It describes the basic operation of each functional circuit blockshown in Figure 3–1. Main Board The Main board assembly conta...
Page 43 - Display Module
Theory of Operation 3–2 THS710A, THS720A, THS730A & THS720P Service Manual Display Module The display module consists of a liquid crystal display (LCD), a display driver,and a flourescent backlight. Switch Assembly The switch assembly is a matrix of switches that form the front-panel buttons.The...
Page 45 - Performance Verification; is required to complete these procedures.; Description
THS710A, THS720A, THS730A & THS720P Service Manual 4–1 Performance Verification This chapter contains performance verification procedures for the specificationsmarked with the n symbol. The following equipment, or a suitable equivalent, is required to complete these procedures. Description Minim...
Page 46 - Test Record
Performance Verification 4–2 THS710A, THS720A, THS730A & THS720P Service Manual Test Record Serial Number Procedure Performed by Date Test Passed Failed Self Test Oscilloscope Tests Low Limit Test Result High Limit Channel 1 DC Measure-me A r y 5 mV/div 34.05 mV 35.95 mV ment Accuracy 500 mV/div...
Page 47 - DMM Tests
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–3 DMM Tests Low Limit Test Result High Limit DC Voltage Accuracy 400 mV range,60 mV input 59.2 mV 60.8 mV 400 mV range,360 mV input 357.7 mV 362.3 mV 4 V range 3.577 V 3.623 V 40 V range 35.77 V 36.23 V 400 V range 357...
Page 48 - Performance Verification Procedures; C, you must perform the; Execute the signal path compensation with the following steps:; resume operation of the TekScope instrument.; Signal Path Compensation
Performance Verification 4–4 THS710A, THS720A, THS730A & THS720P Service Manual Performance Verification Procedures In these procedures, TekScope instrument setups are shown in tables. Refer toConventions on page x for information about how to use these tables. Before beginning these procedures,...
Page 49 - Execute Self Test
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–5 This procedure uses internal routines to verify that the TekScope instrumentfunctions and passes its internal self tests. No test equipment or hookups arerequired. Start the self test with the following setup: SCOPE ...
Page 50 - Set the DC voltage source output level to 0 V.; You may need to press Select Page to display this selection.
Performance Verification 4–6 THS710A, THS720A, THS730A & THS720P Service Manual This test checks the DC measurement accuracy of the oscilloscope. 1. Set the DC voltage source output level to 0 V. 2. Set up the TekScope instrument using the following steps: SCOPE SAVE/RECALL Recall SavedSetup Rec...
Page 51 - Accuracy Limits for V; Set DC voltage source output level to 0 V.
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–7 4. For each VOLTS/DIV setting listed below, perform the following steps: a. Set the DC voltage source output level to the positive voltage listed and then record the mean measurement as V pos . b. Reverse the polarit...
Page 52 - Set up the TekScope instrument using the following steps:; Check Oscilloscope
Performance Verification 4–8 THS710A, THS720A, THS730A & THS720P Service Manual This test checks the bandwidth of channel 1. 1. Set up the TekScope instrument using the following steps: SCOPE SAVE/RECALL Recall SavedSetup Recall FactorySetup — OK Recall Factory — ACQUIRE Mode Average Set to 16 T...
Page 53 - Set the TekScope instrument SEC/DIV to 10; or a; Proceed to the next test to check the channel 2 bandwidth.
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–9 3. Set the TekScope instrument VOLTS/DIV to 100 mV/div. 4. Set the TekScope instrument SEC/DIV to 10 s/div. 5. Set the leveled sine wave generator frequency to 50 kHz. 6. Set the leveled sine wave generator output le...
Page 56 - Set the time mark generator period to 10 ms.
Performance Verification 4–12 THS710A, THS720A, THS730A & THS720P Service Manual This test checks the oscilloscope time base accuracy. 1. Set up the TekScope instrument using the following steps: SCOPE SAVE/RECALL Recall SavedSetup Recall FactorySetup — OK Recall Factory — VERTICALMENU Probe Typ...
Page 57 - Change the TekScope instrument setup using the following steps:; graticule line within
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–13 6. Press SET LEVEL TO 50%. 7. Press MAG. 8. Change the TekScope instrument setup using the following steps: SCOPE HORIZON-TAL MENU Time Base Delayed Runs AfterMain — CLEARMENU — — 9. Set the delayed time base SEC/DI...
Page 59 - Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and; Change the TekScope instrument setup using the following steps:; then check that triggering is stable.
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–15 3. Set the leveled sine wave generator frequency to 200 MHz if you are checking a THS730A or to 100 MHz if you are checking a THS710A,THS720A or THS720P. 4. Set the TekScope instrument VOLTS/DIV to 500 mV/div. 5. Pr...
Page 61 - Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and; Change the TekScope instrument setup using the following steps:
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–17 3. Set the leveled sine wave generator frequency to 200 MHz if you are checking a THS730A or to 100 MHz if you are checking a THS710A,THS720A or THS720P. 4. Set the TekScope instrument VOLTS/DIV to 500 mV/div. 5. Se...
Page 62 - Check Meter DC Voltage
Performance Verification 4–18 THS710A, THS720A, THS730A & THS720P Service Manual This test checks the meter DC voltage accuracy. 1. Set the DC voltage source output level to 0 V. 2. Set up the TekScope instrument using the following steps: METER — VDC — 3. Connect the TekScope instrument to the ...
Page 63 - Set the DC voltage source output level to 0 V.
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–19 4. For each range, set the DC voltage source output to the level listed below, and then compare the meter reading to the accuracy limits. Range DC Voltage Source Output Level Accuracy Limits 400 mV 60 mV 59.2 mV to ...
Page 64 - Set the AC voltage source output level to 0 V.; Check Meter AC Voltage
Performance Verification 4–20 THS710A, THS720A, THS730A & THS720P Service Manual This test checks the meter AC voltage accuracy. 1. Set the AC voltage source output level to 0 V. 2. Set up the TekScope instrument using the following steps: METER — VAC — 3. Connect the TekScope instrument to the ...
Page 65 - Set the AC voltage source output frequency to 500 Hz.; and then compare the meter reading to the accuracy limits.; Set the AC voltage source output level to 0 V.
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–21 4. Set the AC voltage source output frequency to 500 Hz. 5. For each range, set the AC voltage source output to the level listed below, and then compare the meter reading to the accuracy limits. Range AC Voltage Sou...
Page 66 - Check Meter Resistance
Performance Verification 4–22 THS710A, THS720A, THS730A & THS720P Service Manual This test checks the meter resistance measurement accuracy. 1. Set up the TekScope instrument using the following steps: METER — — 2. Connect the TekScope instrument to the resistance standard as shown below. Resist...
Page 67 - This completes the performance verification procedure.
Performance Verification THS710A, THS720A, THS730A & THS720P Service Manual 4–23 3. For each range, set the resistance standard to the resistance listed below, and then compare the meter reading to the accuracy limits. Range Resistance Standard Setting Accuracy Limits 400 360 358.0 to 362.0 4 k ...
Page 70 - Adjustment Procedures; NOTE; Required Equipment
THS710A, THS720A, THS730A & THS720P Service Manual 5–1 Adjustment Procedures This chapter contains adjustment procedures for the TekScope instrument. Only qualified personnel should perform service procedures. Read this ServiceSafety Summary and the General Safety Summary before performing any s...
Page 71 - Overview of the Adjustment Process
Adjustment Procedures 5–2 THS710A, THS720A, THS730A & THS720P Service Manual Description Examples Minimum Requirements Dual Banana to BNC Adapter Banana plugs to BNC female Tektronix part number103-0090-XX BNC T One male and two femaleBNC connectors Tektronix part number103-0030-XX Overview of t...
Page 72 - Accessing the Adjustment-Lockout Jumper; Before doing this or any other procedure in this manual, read the
Adjustment Procedures THS710A, THS720A, THS730A & THS720P Service Manual 5–3 Accessing the Adjustment-Lockout Jumper Before adjusting the instrument you must (temporarily) remove the internaladjustment-lockout jumper. You will need a 12 in ⋅ lb (1.3 N ⋅ m) torque-limiting screwdriver with Torx ...
Page 73 - Figure 5–1: Location of adjustment-lockout jumper; To avoid cross-threading or cutting new threads with the screws,; a. Place the screws into their holes in the back cover.
Adjustment Procedures 5–4 THS710A, THS720A, THS730A & THS720P Service Manual Adjustment-lockout jumper Figure 5–1: Location of adjustment-lockout jumper 11. To install the switch mat, place it (contact side down) on the switch flex-circuit assembly. The five rubber guideposts fit into holes in t...
Page 74 - Oscilloscope Adjustment; Table 5–1: Summary of oscilloscope adjustment steps; Step
Adjustment Procedures THS710A, THS720A, THS730A & THS720P Service Manual 5–5 c. When all four all screws are in, hold a corner of the case together firmlyto compress the gasket while tightening its screw until snug. Repeat forthe other corners. Do not overtighten the screws (14 in ⋅ lbs or 1.5 N...
Page 75 - Square wave generator setup; Figure 5–2: Oscilloscope adjustment setups
Adjustment Procedures 5–6 THS710A, THS720A, THS730A & THS720P Service Manual Fast rise square wave generator Ch 2 Output 50 feedthrough terminator 36 inch BNC cable + – DC voltage source Dual bananato bnc adapter Ch 1 10 inch BNC cable BNC ‘T’ connector Ch 2 50 feedthrough terminator Ch 1 10 inc...
Page 77 - Meter Adjustment; Table 5–2: Summary of meter adjustment steps; W shunt
Adjustment Procedures 5–8 THS710A, THS720A, THS730A & THS720P Service Manual Meter Adjustment Three equipment setups, shown in Figure 5–3, are required to complete thisadjustment procedure. For each step in the procedure, the specific input signalrequired by that step is described in the TekScop...
Page 78 - DC voltage setup; Figure 5–3: Meter adjustment setups
Adjustment Procedures THS710A, THS720A, THS730A & THS720P Service Manual 5–9 + – DC voltage source Banana cables AC voltage source Banana cables Resistance standard Banana cables DC voltage setup AC voltage setup Resistance standard setup Figure 5–3: Meter adjustment setups
Page 79 - Set the DC voltage source amplitude to 400 mV.
Adjustment Procedures 5–10 THS710A, THS720A, THS730A & THS720P Service Manual After removing the adjustment-lockout jumper, use this procedure to adjust themeter voltage references. 1. Turn on the TekScope instrument and let it warm up for at least ten minutes. 2. Connect the DC voltage source t...
Page 80 - Replacing the Adjustment-Lockout Jumper; Figure 5–4: Relocating the adjustment-lockout jumper; This completes the adjustment procedure.
Adjustment Procedures THS710A, THS720A, THS730A & THS720P Service Manual 5–11 Replacing the Adjustment-Lockout Jumper After you complete the adjustment process, you should reinstall the adjustment-lockout jumper to prevent inadvertent loss of calibrration. To replace the jumper,repeat the proced...
Page 83 - Maintenance; Preparation; Static discharge can damage any semiconductor component in this
THS710A, THS720A, THS730A & THS720P Service Manual 6–1 Maintenance This chapter contains the information needed to do periodic and correctivemaintenance on the TekScope instrument. The following sections are included: H Preparation refers you to important information contained elsewhere in thism...
Page 84 - Inspection and Cleaning; To avoid damage to the TekScope instrument, do not expose it to any; General Care
Maintenance 6–2 THS710A, THS720A, THS730A & THS720P Service Manual 3. Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules. Do service of static-sensitivemodules only at a static-free work station. 4. Nothing capable of generating ...
Page 85 - any abrasive or chemical cleaning agents.; Inspection — Interior.; Item
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–3 Inspection — Exterior. Inspect the outside of the TekScope instrument for damage, wear, and missing parts. Instruments that appear to have been droppedor otherwise abused should be checked thoroughly to verify correct operationan...
Page 86 - Cleaning Procedure — Interior.; To clean the TekScope instrument interior,
Maintenance 6–4 THS710A, THS720A, THS730A & THS720P Service Manual Table 6–1: Internal inspection check list (Cont.) Item Repair Action Inspect For Solder connections Cold solder or rosin joints. Resolder joint and clean withisopropyl alcohol. Wiring and cables Loose plugs or connectors.Burned, ...
Page 87 - Removal and Installation Procedures; Read the Summary of Procedures on page 6–6 to understand which
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–5 Removal and Installation Procedures This section describes how to remove and install the major mechanical andelectrical modules. It provides the following information: H List of Modules on page 6–5 describes where to locate a lis...
Page 88 - Table 6–2: Removal and installation procedures; Procedure; Summary of Procedures
Maintenance 6–6 THS710A, THS720A, THS730A & THS720P Service Manual Table 6–2 lists the removal and installation procedures in order of increasingcomplexity. Table 6–2: Removal and installation procedures Procedure Modules Accessed Begins on Page Tilt Stand Tilt stand 6–8 Front-Panel Label Front-...
Page 89 - Tools Required
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–7 You will need the following tools to remove and replace all the modules in theTekScope instrument. H Torque-limiting screwdriver, 12 in ⋅ lb (1.3 N ⋅ m) range with Torx T-15 tip H Screwdriver with 1 @ 4 inch flat blade H Screwd...
Page 90 - STOP; Figure 6–1: Removing the tilt stand; Tilt Stand
Maintenance 6–8 THS710A, THS720A, THS730A & THS720P Service Manual You will need a 1 @ 4 inch flat-bladed screwdriver to remove the tilt stand. STOP . You do not have to remove the tilt stand to access internal modules. In most cases, you do not have to remove the tilt stand to clean the TekScop...
Page 91 - Figure 6–2: Installing the tilt stand
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–9 Installation. Use this procedure to install a new tilt stand. 1. Orient the tilt stand to the back of the instrument case with the hinge pins toward the top and the side bump toward the handle. 2. Insert one hinge pin into its so...
Page 92 - Use the sharp knife to pry up a corner of the label.; or the existing front cover.; Peel the paper off the back side of the new label.; cover as shown in Figure 6–3.; Figure 6–3: Installing a new front-panel label
Maintenance 6–10 THS710A, THS720A, THS730A & THS720P Service Manual You will need a sharp knife and needle-nose pliers to remove a defectivefront-panel label. CAUTION. Removal of a front-panel label will destroy it. Do not remove it unless it is defective and needs to be replaced. Removal. Use t...
Page 93 - Front Cover
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–11 You will need a torque-limiting Torx T-15 screwdriver, needle-nose pliers, and sharp knife to remove the front cover and other immediately accessible modules. CAUTION. Attempting to remove the display shield from the front cov...
Page 94 - Figure 6–4: Removing the battery door
Maintenance 6–12 THS710A, THS720A, THS730A & THS720P Service Manual Figure 6–4: Removing the battery door NOTE . In most cases, the gasket does not have to be removed from the front cover for interior cleaning. 10. To remove the gasket from the front cover, use the needle-nose priers to lift it ...
Page 95 - a. Install a new label using the procedure on page 6–10.; Figure 6–5: Assembling a new front cover
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–13 4. If you are installing a new front cover, follow these steps to assemble it before installation. Refer to Figure 6–5. a. Install a new label using the procedure on page 6–10. b. Install a new display shield into the inside of ...
Page 96 - Figure 6–6: Installing the gasket
Maintenance 6–14 THS710A, THS720A, THS730A & THS720P Service Manual Front cover Gasket material Trim tails to 1 @ 8 inch Overlap gasket material Figure 6–6: Installing the gasket 5. Slip the handle into the guides of the back cover as shown in Figure 6–7. 6. Place the front cover assembly onto t...
Page 97 - Figure 6–7: Installing the handle
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–15 Velcro strip Fold end of handle over Figure 6–7: Installing the handle
Page 98 - To avoid scratching the surface of the display module, do not let it
Maintenance 6–16 THS710A, THS720A, THS730A & THS720P Service Manual CAUTION. To avoid cross-threading or cutting new threads with the screws, carefully follow the procedure in the next step. 8. To install the four screws, follow these steps: a. Place the screws into their holes in the back cover...
Page 99 - Figure 6–8: Removing the display module; Using the
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–17 Display module Spring Inverter board Display cable connector Switch flex-circuit board Figure 6–8: Removing the display module c. Using the 1 @ 8 inch flat-bladed screwdriver, carefully open the display- cable connector as shown...
Page 100 - Figure 6–9: Opening the display cable connector; the cable in the channels as shown in Figure 6–10.
Maintenance 6–18 THS710A, THS720A, THS730A & THS720P Service Manual Contact side of cable Figure 6–9: Opening the display cable connector Installation. Use this procedure to install the display module and inverter board. 1. Open the display-cable connector on the back of the display module. 2. H...
Page 101 - Figure 6–10: Routing cables to the inverter board; Back Cover
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–19 Route cablethrough channels Display module Route cable under clip Route cable through channel Inverter input connector Inverter output connector Inverter board Figure 6–10: Routing cables to the inverter board You will need a 1 ...
Page 102 - Figure 6–11: Lifting the chassis; inch flat-bladed screwdriver
Maintenance 6–20 THS710A, THS720A, THS730A & THS720P Service Manual 4. Carefully lift the bottom of the chassis out of the back cover. As the chassis assembly comes out, pull it toward you to back the BNC connectors out oftheir holes in the back cover. Figure 6–11: Lifting the chassis 5. When th...
Page 103 - Figure 6–12: Foam pad and hole plug locations on the back cover; clearance for the chassis.
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–21 Install foam pads Install foam pads Install foam pad Install foam pad Install I/O porthole plug Install DC power hole plug Figure 6–12: Foam pad and hole plug locations on the back cover c. Place the back cover on a soft surface...
Page 104 - Figure 6–13: Routing the battery wires
Maintenance 6–22 THS710A, THS720A, THS730A & THS720P Service Manual Dress wires from battery pack through slots Retain connectors between pins Locate ferrite bead in cavity Figure 6–13: Routing the battery wires
Page 105 - g. Complete the removal of the main board and switch flex-circuit; Complete Disassembly
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–23 You will need a 1 @ 8 inch flat-bladed screwdriver and needle-nose pliers to remove modules mounted to the the chassis. Removal. First, remove the front cover and switch mat using the procedure on page 6–11. Next, remove the cha...
Page 106 - To remove the inverter board cable from the main board, unplug it.
Maintenance 6–24 THS710A, THS720A, THS730A & THS720P Service Manual Lift here Unplug connectors Display module cable Battery cable 1 2 3 4 5 6 Unplug connectors Figure 6–14: Removing the main board and switch flex-circuit assembly 4. To remove the switch flex-circuit assembly from the main board...
Page 107 - Figure 6–15: Foam pad locations on the chassis; facing up and away from you.
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–25 Installation. Use this procedure to reassemble the entire instrument. 1. Check that the ten foam pads on the chassis are correctly installed. The foam pads that surround the display module should be aligned to locating marks int...
Page 108 - b. Dress the battery wires away from you.; under the main board.
Maintenance 6–26 THS710A, THS720A, THS730A & THS720P Service Manual 5. To prepare the main board and switch flex circuit board for installation into the chassis, follow these steps: a. Fold the switch flex-circuit assembly toward you. b. Dress the battery wires away from you. c. Dress the two co...
Page 109 - Figure 6–16: Reassembling the chassis
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–27 Insert circuit board tabs into chassis holes Route battery cable into slot in chassis (not shown) Figure 6–16: Reassembling the chassis 7. To install the display cable, follow these steps: a. Use the 1 @ 8 inch flat-bladed screw...
Page 110 - Troubleshooting; Tools and Equipment; Display color is dark blue or violet when viewed straight on; Adjustment After Repair
Maintenance 6–28 THS710A, THS720A, THS730A & THS720P Service Manual Troubleshooting This section contains information and procedures to help you isolate a defectivemodule in the TekScope instrument. WARNING. Before doing this or any other procedure in this manual, read the General Safety Summary...
Page 111 - Figure 6–17: Battery connector location
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–29 H Displayed information is interrupted by static horizontal or vertical linesor stripes 3. If (after a short wait) you can see that the display operates normally but the display backlight does not turn on, then skip to Backlight...
Page 112 - With the AC adapter still disconnected, use a DMM to measure the DC; Instructions; inch flat-bladed screwdriver to lift the lower edge of the chassis
Maintenance 6–30 THS710A, THS720A, THS730A & THS720P Service Manual 8. With the AC adapter still disconnected, use a DMM to measure the DC voltage at the battery connector. Follow the instructions in the table below. Voltage Measurement at BatteryConnector Instructions Approximately 0 V DC Check...
Page 113 - Instrument Behavior; Figure 6–18: Bypassing the ON/STBY switch
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–31 12. Using a bent paper clip, momentarily short pins 15 and 17 of the connector to bypass the ON/STBY switch as shown in Figure 6–18. Follow theinstructions in the table below. Instrument Behavior Instructions Instrument turns on...
Page 114 - Using a DMM, measure the DC voltage across pins 1 and 2 of the input; Backlight
Maintenance 6–32 THS710A, THS720A, THS730A & THS720P Service Manual Follow these steps to troubleshoot a nonfunctional backlight. 1. Remove the front cover using the procedure Front Cover on page 6–11. 2. Turn the instrument on, remove the switch mat, and then fold the switch flex-circuit assemb...
Page 115 - Oscilloscope Display; Follow these steps to troubleshoot a nonfunctional display.; Connect the AC adapter to the instrument; flex-circuit assembly toward you to access display cable.; Signal at Loose End of Display Cable
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–33 5. Hold the probe tip above the output connector of the inverter board. Do not touch the probe tip to either of the conductors in the connector. Follow theinstructions in the table below. Oscilloscope Display Instructions No sig...
Page 116 - instrument is on by probing the PROBE COMP output.
Maintenance 6–34 THS710A, THS720A, THS730A & THS720P Service Manual Signal at Loose End of Display Cable Description Pin 7 –10 V DC to –22 V DC Pin 8 0 V (ground) Pin 9 +5 V DC Pin 10 1.89 MHz clock (528 ns period), ≈ 50% duty cycle, appears in bursts, high = 5 V, low = 0 V Pin 11 19.3 kHz clock...
Page 117 - Executing Diagnostics
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–35 Follow these steps to troubleshoot using diagnostics. 1. To execute the internal diagnostic tests, remove all input signals from the instrument and then perform the following steps: SCOPE UTILITY System Diag Loop Once Execute — ...
Page 118 - Check that the wire connections to the back side of the DMM and COM; Input Connections
Maintenance 6–36 THS710A, THS720A, THS730A & THS720P Service Manual Follow these steps to troubleshoot the input connections only if the followingcondition is true: the instrument appears to function normally in every wayexcept you have determined that the channel 1, channel 2, or DMM signal is ...
Page 119 - Button; Other Troubleshooting
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–37 Use these techniques to troubleshoot other parts of the instrument. Buttons. Press each of the front-panel buttons to verify that it operates properly. The table below lists the buttons that depend on a particular instrument sta...
Page 121 - Battery and External Power.; Verify the battery and external power with the; AC Adapter Voltage Measurement
Maintenance THS710A, THS720A, THS730A & THS720P Service Manual 6–39 Battery and External Power. Verify the battery and external power with the following procedure: NOTE . If the instrument runs normally under battery power but only for a short time, the battery may have lost its capacity to hold...
Page 122 - Unpacking and Repacking Instructions; Unpacking
Maintenance 6–40 THS710A, THS720A, THS730A & THS720P Service Manual Unpacking and Repacking Instructions This section contains the information needed to unpack the TekScope instrumentand repack it for shipment or storage. The TekScope instrument and its standard accessories are carefully packed ...
Page 124 - Table 7–1: TekScope instrument options; Option
THS710A, THS720A, THS730A & THS720P Service Manual 7–1 Options The TekScope instrument options provide AC adapters, User Manuals, andReference Manuals for international customers. Table 7–1 describes theseoptions. Table 7–1: TekScope instrument options Option Description A1 Universal European AC...
Page 133 - Part number (see Part Number Revision Level below); Part Number Revision
THS710A, THS720A, THS730A & THS720P Service Manual 10–1 Mechanical Parts List This section contains a list of the replaceable modules for the TekScopeinstrument. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local T...
Page 134 - Using the Replaceable Parts List; Parts List Column Descriptions; Column; Module Servicing
Mechanical Parts List 10–2 THS710A, THS720A, THS730A & THS720P Service Manual Modules can be serviced by selecting one of the following three options. Contactyour local Tektronix service center or representative for repair assistance. Module Exchange. In some cases you may exchange your module f...
Page 135 - Manufacturers Cross Index; Manufacturer
Mechanical Parts List THS710A, THS720A, THS730A & THS720P Service Manual 10–3 Manufacturers Cross Index Mfr.Code Manufacturer Address City, State, Zip Code 0BL82 CRT SCIENTIFIC 14746 RAYMER ST VAN NUYS, CA 91405 0KB01 STAUFFER SUPPLY CO. 810 SE SHERMAN PORTLAND, OR 97214-4657 1DM20 PARLEX CORP. ...
Page 136 - Replaceable Parts List
Mechanical Parts List 10–4 THS710A, THS720A, THS730A & THS720P Service Manual Replaceable Parts List Fig. &IndexNumber Tektronix PartNumber Serial No.Effective Serial No.Discont’d Qty Name & Description Mfr.Code Mfr. Part Number 10–1 334-9310-00 B010100 1 LABEL: FRONT PANEL (THS710A) 226...
Page 137 - Figure 10–1: Exploded diagram
Mechanical Parts List THS710A, THS720A, THS730A & THS720P Service Manual 10–5 1 12 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 9 9 9 9 9 Figure 10–1: Exploded diagram
Page 138 - Table 10–1: Replaceable standard accessories; Description of Accessory
Mechanical Parts List 10–6 THS710A, THS720A, THS730A & THS720P Service Manual Table 10–1 lists the replaceable standard accessories for the TekScope instrumentand the instrument options that included them in the original shipment. Theseaccessories are not shown in Figure 10–1. Table 10–1: Replac...
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