Page 1 Service Manual Tektronix 2440 Oscilloscope Serial Number B014064 & below 070-6603-00 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 the Safety Summary prior to performing service.
Page 2 Instrum ent Serial N um bers Each instrum ent m anufactured by Tektronix has a serial n um ber on a panel insert or tag, or stam p ed on th e chassis. T h e first letter in th e serial n um ber d esig n ates the country of m anufacture. T h e last five digits of th e serial n um ber are assigned sequentially and are unique to each instrum ent.
Page 3 WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Page 5: Table Of Contents
2440 Service TABLE OF CONTENTS Page Page LIST OF ILLUSTRATIONS..........FRONT PANEL PRO CESSO R....3-28 LIST OF T A B L E S ..............FRONT PANEL CONTROLS....3-30 OPERATORS SAFETY SU M M A R Y ........ SYSTEM DAC AND ACQUISITION SERVICING SAFETY SUM M AR Y........
Page 6 6-30 TRANSISTORS AND Diagnostic Procedures........6-32 INTEGRATED C IR C U ITS......6-12 2440 Troubleshooting Procedures Table..6-35 SOLDERING T E C H N IQ U E S ....6-14 Video Option Troubleshooting T ab le .... 6-99 REMOVAL AND REPLACEMENT Troubleshooting Charts........
Page 7: List Of Illustrations
Dimensional drawing........................... 1-24 LINE VOLTAGE SELECTOR, line fuse, and power cord receptacle..........2440 simplified block diagram........................Simplified Memory Map of the 2440......................3-18 System Clock w aveform s..........................3-37 Simplified Peak Detector block diagram....................3-47 Simplified CCD architecture......................... 3-49 Trigger Logic Array Control Data Byte....................
Page 8 Semiconductor lead configurations. Locating components on schematic diagrams and circuit board illustrations. 9-4a Detailed 2440 Block Diagram. 9-4b Detailed 2440 Block Diagram (cont). A12— Processor Board. A13— Side Board. A14— Front Panel Board. A10— Main Board. A30, A31, A32 and A 3 3 -G a in Cell Boards.
Page 9 Minimum Signal Level for EXT1 or EXT2 Triggering................ 4-21 Relative Susceptibility to Static-Discharge Damage................. External Inspection Check List....................... Internal Inspection Check List........................ Power Supply Voltage and Ripple Limits..................... 6-10 Maintenance A id s............................6-13 2440 Troubleshooting Procedures......................6-37 Video Option Troubleshooting........................ 6-104 INIT PANEL States............................ 6-108...
Page 10: Operators Safety Summary
2440 Service OPERATORS SAFETY SUMMARY The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings and cautions will be found throughout the manual where they apply and do not appear in this summary.
Page 11: Servicing Safety Summary
2440 Service SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY R efer also to the preceding Operators Safety Summary. D o N o t S e rv ic e A lo n e Disconnect power before removing protective panels, sol...
Page 13: Section 1 Specification
Section 1— 2440 Service SPECIFICATION INTRODUCTION VERTICAL SYSTEM TEKTRONIX 2440 Digital Oscilloscope The two vertical channels have calibrated deflection portable, dual-channel instrument with a maximum digitiz factors from 2 mV to 5 V per division in a 1 -2-5 sequence of 14 steps.
Page 14 Specification— 2440 Service delay may be set from 1 to 65,536, with a resolution of mode discussed ‘ Controls, Connectors, one event. The DELTA DELAY feature produces two Indicators” in Section 5 of the Operators manual. independently settable delayed B Traces DELAY by TIME.
Page 15 Specification— 2440 Service nel 1 or channel 2 (or the results of an addition or multipli maximum and minimum data-point values over a selected cation of the two channels) to any REF memory or to number of acquisitions from 1 to 256 plus CONT (continu...
Page 16: Performance Conditions
“Options and Accessories” (Section 7) in this manual. For additional information on accessories and For optimum performance to specification, the internal ordering assistance, contact your Tektronix representative SELF CAL should be done: or local Tektronix Field Office.
Page 17 Specification— 2440 Service Table 1-1 Electrical Characteristics Characteristics Performance Requirements ACQUISITION SYSTEM— CHANNEL 1 AND CHANNEL 2 Resolution 8 bits.® Displayed vertically with 25 digitization levels (DL)b per division. Dynamic Range® SEC/DIV 100 or slower - 1 2 8 to + 1 2 7 DL’s.
Page 18 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements ACQUISITION S YSTEM --C H A N N E L 1 AND CHANNEL 2 (cont) Bandwidth Bandwidth is measured with a leveled, low distortion, 50-12 source, sine-wave generator, terminated in 50 12. The reference signal is set to 6 divisions or to the maximum leveled amplitude obtainable if the Volt/Div setting is too high to yield 6 div’s on screen.
Page 19 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements ACQUISITION SYSTEM --C H A N N E L 1 AND CHANNEL 2 (cont) Envelope Mode Pulse Response Minimum Single Pulse Width for 50% or Greater 2 ns.a Amplitude Capture at 85% or Greater Confidence Minimum Single Pulse Width for Guaranteed 50% 8 ns.a...
Page 20 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements ACQUISITION SYSTEM--CHANNEL 1 AND CHANNEL 2 (cont) Maximum Input Voltages Input Coupling Set to DC, AC, or GND 400 V (dc -)- peak ac); 800 V p-p ac at 10 kHz or less.®...
Page 21 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements TRIGGERING— A and B Minimum P-P Signal Amplitude for Stable3 Triggering from Channel 1, Channel 2, or ADD Source A Trigger 0.35 division from DC to 50 MHz, increasing to 1.0 division at DC Coupled 300 MHz;...
Page 22 Specification— 2440 Service Table 1-1 (cont) Performance Requirements Characteristics TRIGGERING— A and B (cont) Maximum P-P Signal Rejected by NOISE REJ Coupling Signals within the Vertical Bandwidth 0.4 division or greater for VOLTS/DIV settings of 10 mV and Channel 1 or Channel 2 Source higher.
Page 23 Specification— 2440 Service Table 1-1 (cont) Performance Requirements Characteristics TRIGGERING— A and B (cont) LEVEL Readout Accuracy (for triggering signals with transition times greater than 20 ns) (continued) EXT TRIG 1 or EXT TRIG 2 Source EXT GAIN = 1 Within ±...
Page 24 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements TRIGGERING— A and B (cont) MIN HO® MAX HO® Variable A Trigger Holdoff A SEC/DIV® 5-10 500 ns 10-20 1 MS 20-40 100-150 50-100 0.1-0.2 ms 0.2-0.4 ms 1-1.5 ms 0.5-1.0 ms...
Page 25 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements TIME BASE Sample Rate Accuracy Average Over 100 or More Samples ± 0.0015% .a External Clock Repetition Rate Minimum 1 MHz.® Maximum 100 M Hz.a Events Count 1 to 65,536® Events Maximum Repetition Rate 100 MHz.®...
Page 26 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements TIME BASE (cont) Delay Time Range B RUNS AFTER DELAY SEC/DIV 50 ns and faster REPET ON (0.08 x B SEC/DIV) to 1.05 ms.a REPET OFF (0.08 x B SEC/DIV) to 524 fis .a...
Page 27 Specification- 2 4 4 0 Service Table 1-1 Electrical C haracteristics (Cont.) Characteristic Performance Requirement NONVOLATILE MEMORY Front-Panel Setting, Waveform Data, Sequencer, and Greater than 3 years. Calibration Data Retention Time Proprietary Data Removal from Memory Executing a TEKSECURE Erase Memory irretrievably deletes all saved waveforms (on screen or in Reference memories), all front-panel settings, and all sequences stored in Sequencer memory.
Page 28 S pecification—244 0 Service Table 1-1 Electrical C h aracteristics (C ont.) Characteristic Performance Requirement SIGNAL OUTPUTS CALIBRATOR CALIBRATOR output amplitudes at 5 MHz are at least 50% of output amplitudes at 1 ms SEC/DIV setting.3 Voltage (with A SEC/DIV switch set to 1 ms) 0.4 V ±...
Page 29 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements SIGNAL OUTPUTS (cont) CH 2 SIGNAL OUTPUT Output Voltage 20 mV per division ± 10% into 1 M0. 10 mV per divison ± 10% into 50 0. Offset ± 10 mV into 50 0, when dc balance has been performed within ±...
Page 30 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements DISPLAY Graticule 80 mm x 100 mm (8 X 10 divisions).3 Phosphor P31.a Nominal Accelerating Potential 16 kV.a Waveform and Cursor Display, Vertical Resolution, Electrical One part in 1024 (10 bit). Calibrated for 100 points per division.3...
Page 31 ROD-L/EPA Electronic Model 100AV Hi-Pot Tester. This tests both the Primary Circuit Dielectric Withstand and Primary Grounding in one operation. Contact Tektronix Product Safety prior to using any other piece of equipment to perform these tests.
Page 32 (Tektronix Standard 062-2858-00). Packaged Transportation Drop Meets the limits of the National Safe Transit Assn., test pro cedure 1A-B-2; 10 drops of 36 inches (914 mm) (Tektronix Stand ard 062-2858-00). Vibration Meets the limits of the National Safe Transit Assn., test pro...
Page 33 5 (CS-06 and RS-02), and part 7 (C S-01, RE-02, and RS- 03— limited to 1 GHz); VDE 0871, Category B; Part 15 of FCC Rules and Regulations, Subpart J, Class A; and Tektronix Standard 062-2866-00. Meets Tektronix Standard 062-2862-00. The instrument will not Electrostatic Discharge Susceptibility change control states with discharges of less than 10 kV.
Page 34 479 mm (18.86 in). 550 mm (21.65 in). With Handle Extended Cooling Forced air circulation; no air filter. Finish Tektronix Blue vinyl-clad material on aluminum cabinet. Construction Aluminum-altoy/plastic-composite chassis (spot-molded). Plastic- laminate front panel. Glass-laminate circuit boards. RACKMOUNTING Rackmounting Conversion Kit 4.0 kg (8.8 lbs).
Page 35 Specification— 2440 Service Table 1-4 Option 05 (TV Trigger) Electrical Characteristics Characteristics Performance Requirements VERTICAL— CHANNEL 1 AND CHANNEL 2 Frequency Response Full Bandwidth Within ± 1 % . 50 kHz to 5 MHz Greater than 5 MHz to 10 MHz...
Page 36 Specification— 2440 Service Table 1-4 (cont) Characteristics Performance Requirements TRIGGERING Sync Separation Stable video rejection and sync separation from sync-positive or sync-negative composite video, 525 to 1280 lines, 50 Hz or 60 Hz, interlaced or noninterlaced systems. Trigger Modes A Horizontal Mode...
Page 37 Specification— 2440 Service Dimensions are in inches [mm] 4918-39 Figure 1-1. Dimensional drawing. 1 -2 5...
Page 39: Preparation For Use
2. Pull the cap (with the attached fuse inside) out of the fuse holder. This section tells how to prepare for and to proceed with the initial start-up of the TEKTRONIX 2440 Digital 3. Verify proper fuse value (see Table 2-1). Oscilloscope.
Page 40 Preparation for Use— 2440 Service Table 2-1 Voltage, Fuse, and Power-Cord Data Line Factory Power Cord Voltage Fuse Plug Voltage Installed Reference Range Category Holder Selector Configuration Instrument Standards* Plug Type (AC) Setting Fuse 5 A , 2 5 0 V U .S.
Page 41: Power Cord
Table 2-1, and part numbers are listed in “Options and Accessories” (Section 7). Con tact your Tektronix representative or local Tektronix Field Failure of a test in the range of 7000 to 9300 may not Office for additional power-cord information.
Page 42: Power-Down
MUST be used to access the SELF CAL menu—see Section 6 for more information). If failures persist after the SELF CAL is performed, refer the If the instrument is being shipped to a Tektronix instrument to qualified service personnel. Service Center, enclose the following informa...
Page 43: Theory Of Operation
Section 3— 2440 Service THEORY OF OPERATION SECTION ORGANIZATION INTEGRATED CIRCUIT DESCRIPTIONS This section of the manual is divided into three subsec tions, with each subsection increasing in detail. The first subsection is the “Simplified Block Diagram Description” Digital logic circuits perform most of the functions which contains a general summary of instrument operation within the instrument.
Page 44: Simplified Block Diagram Description
Theory ol Operation— 2440 Service SIMPLIFIED BLOCK DIAGRAM DESCRIPTION This discussion is of the block diagram shown in Common-mode adjust circuitry on the output of the Figure 3-1. Peak Detectors is used to control the overall gain of the Peak Detector/CCD acquisition subsystem. Using digital signals to the DAC system, analog voltages are generated that set the gain of the Common-mode adjust amplifiers.
Page 45 Theory of Operation— 2440 Service CH 1-2 CH 1-3 CH 1-4. TRIG CH 2-1. CH 2-2. CH 2-3r CH 2-4 HMMIO SELECTS AND R/W TO SYSTEM PROCESSOR <A> SYSTEM Z-INT AUXILIARY DIGITAL FRONT MUX SELECTS AND ACQUISITION PANEL<6> CONTROL FRONT...
Page 46 Theory of Operation— 2440 Service The Bus Connect circuitry includes logic gating that Latches comes from the System Clock circuit and is refer arbitrates when the Waveform memory space (RAM) enced to the Output Clocks to maintain the correct data...
Page 47 Theory of Operation— 2440 Service S y s te m P ro c e s s o r (d ia g ra m 1) F ro n t P a n e l (d ia g ra m 4 ) a n d A u x ilia ry F ro n t P a n e l (d ia g ra m 6) The System #/P.
Page 48 Theory of Operation— 2440 Service Registers to control the setup of the Peak Detectors, the will determine which measurement is the one actually A/B Trigger Generator, the Trigger Logic Array, and the used. The RAMP and RAMP signals from the Trigger cir...
Page 49 Theory of O peration— 2440 S ervice S y s te m C lo c k s (d ia g ra m 7 ) Three BNC connectors comprise a third interface which used help control AutoStep Sequencer. System Clocks circuitry...
Page 50: Detailed Block Diagram Description
Theory of Operation—2440 Service frequency switching, much more efficient power Low V o ltage R egulators (diagram 23) transfer is possible. Regulation of the power to the switch ing transformer is controlled by a pulse-width modulator The Low Voltage Regulators remove ac noise and rip...
Page 51 Theory of O peration— 2440 S ervice buffered signals are then either amplified further or “peak two of the output signal pairs from the Peak Detectors. detected" and amplified, depending on the acquisition FISO and Short-Pipeline analog sampling modes are both mode setting.
Page 52: Acquisition Process And Control
Theory of Operation— 2440 Service At this point in the sampling process the Time Base When the Trigger Logic Array determines that the addi Controller is waiting for a triggering gate from the Trigger tional triggering conditions are also met, the Time Base System to complete the acquisition (see “Acquisition Pro...
Page 53: Analog Data Conditioning And A/D Conversion
Theory of O peration— 2440 S ervice not needed to fill the 1024-point waveform record have The remainder of the Short-Pipeline save operation is been clocked out so that only the samples properly posi similar to a FISO save. The Acquisition Memory Address...
Page 54: Acquisition Processing And Display
Theory of Operation— 2440 Service Sample-and-Hold outputs of both CH 1 an CH2 are gated continue to control the enabling of the outputs of the in turn to the A/D Converter. The cycle then repeats until acquisition latches as described, but the new data bytes 1024 samples from all four sides of both CCDs have are not continually clocked into the latches.
Page 55 Theory of O peration— 2440 Service Data T ransfer to Display DACs to move stored data out to the Waveform Data bus via the Data Bus buffer. This data is written either into the When the System initiates the display of the data...
Page 56 Theory of Operation— 2440 Service Vector Generators consist of a High-Current passed through an rc integrator that produces vectors Difference Amplifier, a Sample-and-Hold circuit, and a between the min-max data points of the Envelope Mode Integrator to produce the vectors that connect the sample display.
Page 57: Detailed Circuit Description
Theory of O peration— 2440 Service DETAILED CIRCUIT DESCRIPTION SYSTEM PROCESSOR The RD signal is derived from U844A, which NANDs the HVMA signal with the R/W signal. Inverting buffer U572C provides added driving power to the R/W signal, The System Processor (diagram 1) is the control center and inverting buffer U884B reinverts it back to its original of all operations in the scope.
Page 58 Theory of Operation— 2440 Service ing program with all electrical components in valid (defined) incrementing address lines in the forced “KERNEL” troubleshooting mode described in the “ Data Bus Buffer" states after the instrument is powered on. description. The Power-Up Reset circuit consists of a Texas Instru...
Page 59 Theory of O peration— 2440 Service interrupts is present at the same time as the NMI, the U654. The enabled buffer passes the status of the various gives preference to the NMI and immediately branches to interrupt lines at its inputs to the data bus for the ^P to the power-down routine.
Page 60 Theory of Operation— 2440 Service SYSTEM ADDRESS WAVEFORM PROC ADDRESS BUS (HEX) ADDRESS BUS OOOOh SAVE MEMORY MISCELLANEOUS U350 RAM U664 (32K IN FOUR 8K (16K) BANK-SWITCHED PAGES) lOOOh 2000h DISPLAY MEMORY U431. U440 _____ ( 3 K ) _____...
Page 61 T h eo ry o f O p e ratio n —2 4 4 0 Service As indicated by the memory map, addresses from 4000h-4FFFh or from 7000h-7FFFh. In these address 0000h-7FFFh are overlapping addresses; that is, if they are ranges, the LO host RAM enable holds off the BUS- GRANT-forced HI at the output of U250D from driving the originated by the System Processor, they may map to...
Page 62 Theory o f O p eratio n - 2 4 4 0 Service Host M em o ry-M ap p ed I/O Table 3-1 H ost-M em ory-M apped I/O To permit the System |iP to control the hardware functions of the scope, several control registers have been assigned to W /R O utput Signal...
Page 63 Theory of O p e ratio n - 2 4 4 0 Service Operation of U760, the Processor Miscellaneous Register The chip-select circuit for System RAM U664 consists of (PMREG), is similar to U860 just described. Data is written Q842, Q960, CR944, and associated components. With into the register with the PMISCOUT (processor miscella...
Page 64: Waveform Processor System
Theory of O p e ratio n - 2 4 4 0 Service instruction-data busses. The Waveform pP is clocked at Table 3-3 2.5 MHz and executes one instruction each clock cycle. Processor M iscellaneous R egister Internally the Waveform pP uses a 32-bit wide instruction (PMREG) O utput Functions word.
Page 65 T h e o ry o f O p e ra tio n - 2 4 4 0 S e rv ic e inverts the output from the OR-gate (WVMA—waveform W aveform O p eratio n —When the Waveform jjP gains valid-memory address), and when that output again goes control of the waveform bus, it sequentially moves the 1024 LO, the rising edge of the inverted WVMA signal on the clock...
Page 66 Theory of O p e ratio n - 2 4 4 0 Service W aveform pP R ead/W rite Enabling—Once latched, the request) to the Waveform pP and waits until the Waveform address is removed from the bus and, depending on wheth pP outputs a BUSACK (bus acknowledge) to OR-gate er jaP U470 is supposed to be reading or writing, data will be U332D.
Page 67 Theory o f O p eratio n - 2 4 4 0 Service One input to U850A is BUSGRANT. Since BUSGRANT is HI, To summarize, the conditions that must be present for the BUSGRANT is LO a few nanoseconds after BUSGRANT decoding circuitry to produce an enable to the Bus Connect enables.
Page 68 T heory o f O p eratio n - 2 4 4 0 Service higher memory location. This address selection scheme is Table 3-4 the “double-fetch” of instruction data mentioned previously W aveform pP A ddress Decoding in the Waveform pP description. A ddress Bits O utput Signal (Active LO) Removing jum per P128 disables the Waveform ROMs and...
Page 69 T h eo ry of O p eratio n - 2 4 4 0 Service The System Processor can also access this address bus by A ddresses 2000h-4FFFh and 6 0 00h -6F F F h —Addresses in these ranges select either Y2 (DISP), Y3 (DATT), Y4 asserting BUSGRANT and WPRAM H I.
Page 70: Front Panel Processor
Theory o f O p e ratio n - 2 4 4 0 Service ACQDN (acquisition done) signals on the WD bus where Front Panel pP they may be read. These status bits are used by the reading pP to determine when to execute the next phase of a display Front Panel pP U700 does the reading of the front-panel or acquisition sequence.
Page 71 T h eo ry o f O p e ratio n - 2 4 4 0 Service front-panel switch data out) lines, where it is read by the Handshake Logic Front Panel pR This cycle is then repeated for the seven remaining rows of the matrix to read all the switches.
Page 72: Front Panel Controls
Theory of O p e ra tio n - 2 4 4 0 Service Trigger Status Indicators Front-Panel Sw itch Scanner The Front Panel Trigger Status Indicators provide visual information regarding trigger slope and trigger status to the The Front Panel switches are arranged in an electrical array user.
Page 73: System Dac And Acquisition Control Registers
Theory of Operation— 2440 Service addition front-panel push-button The System DAC portion of the circuitry consists of a continuous-rotation switches connected in the switch data latch that stores the digital value to be converted, a array, there is a rate switch associated with the Horizontal D/A converter that does the actual conversion, a multi...
Page 74 Theory of Operation— 2440 Service DAC l-TO-E CONVERTER. This circuit changes the deviation from the correct + 1 .2 5 V level produces a gain- differential output currents from DAC U860 into a single- correction voltage applied to the DAC via R760. Capacitor...
Page 75: System Dac (Cont) And Auxiliary Front Panel
Theory of Operation— 2440 Service Jit 1 Gain and Jit 2 Gain amplifiers and down to about 1 D A C M u ltip le x e rs for the CH 1 and CH 2-BAL voltage followers. The Jitter DAC Multiplexers U821, U830, and U831 route the...
Page 76 Theory of Operation— 2440 Service Selecting an input to pass through multiplexer U811 is current through that transistor by a small amount. The done by two active input signals, BRIGHTZ and RO. (The change in current is in the appropriate direction to make...
Page 77: System Clocks
Theory of Operation— 2440 Service OVL levels (used to indicate when an excessive voltage is S e c o n d a ry C lo c k s applied to the input connector), or one of the two, 180 Secondary...
Page 78 Theory of Operation— 2440 Service After one run through the counting cycle at power-on, When acquired samples are to be shifted out of the any unknown counter states in divide-by-ten counter U622 C H I and CH2 CCD array, the TTL version of the Phase-...
Page 79 Theory of Operation— 2440 Service 2X P C -------------- soons -----------------H T T L C 2 " V ----------------------------------------- tOOOnS ----------------------------------------- - | S YN C C 2 “ 1 _________________________________ 1 ______ C 2 0 M 2 ^=ruvinjuuinjijuuuuirinjuu^ 1 ______1...
Page 80 Theory of Operation— 2440 Service A similar 250 ns cycle occurs for the OS2 LO state, That same 20 M Hz clock loads counter U721 with 1100 ending with the LO being shifted to the QD output of binary and clocks SYNC from pin 15 of U830 HI. With U730.
Page 81: Time Base Controller And Acquisition Memory
Theory of Operation— 2440 Service modes of the CCD (charge-coupled devices) arrays must M S 1 3 + M S 1 1 , and M S 2 3 + M S 2 1 to drive these Acquisi tion Latch Switches. (For example, M S 1 2 + M S 1 4 indicates be controlled by U670;...
Page 82 Theory of Operation— 2440 Service B register that are extra. When the analog samples are The FISO (fast-in, slow-out, pin 36), ROLL (pin 2), and ENVL (envelope, pin 39) outputs are set indirectly by Sys serially moved out of the CCD array for digitization, these...
Page 83 Theory of Operation— 2440 Service of the last-saved point from the Record-End Latch (U502 data bytes are moved to the Save Memory by the and U601). Since the Acquisition Memory addresses are Waveform ^P and control is given back to the System UP...
Page 84 Theory of Operation— 2440 Service When the TB2M EM signal goes LO, the counters become M em ory M ode Control “transparent.” This connects the Waveform address The Memory Mode Control circuit is made up primarily bus to the address inputs of the Acquisition Memory so...
Page 85: Attenuators And Preamplifiers
Theory of Operation— 2440 Service on whether FI SO or Short-Pipe mode is called for. The 1 Mfi position to prevent damage to the attenuator, and TBTRIG bit used in Short-Pipe mode tells the Waveform the error message “50 OVERLOAD" is displayed on the when the Time Base Controller detected Record CRT.
Page 86 Theory of Operation— 2440 Service the Attenuator Control Register and strobed into the relay. approximately every 64 ms, holding the Preamplifier in a All coil leads for the remaining relays are set HI, and only dc-balanced condition. the selected relay will be set.
Page 87: Peak Detectors And Ccd/Clock Drivers
Theory of Operation— 2440 Service between + PICK (pin 12) and — PICK (pin 15) of U420. Any the external trigger inputs will exceed the control ranges of common-mode signals present are inverted and applied to the Trigger System. The logic levels of control bits applied...
Page 88 Theory of Operation— 2440 Service supplied externally to the CCD via Q450, Q460, and Q 551. CCD input register. The outputs of the positive peak All control logic for the CCD/Clock Drivers, with the excep detectors are multiplexed to the differential OUTEVEN pins...
Page 89 Theory of Operation— 2440 Service L530 L531 CAL; F A S T PEAK D E TE C TO R TRACK HOLD HOLD TRACK TRACK DISPLAY DISPLAY DISPLAY DISPLAY HOLD TRACK TRACK DISPLAY DISPLAY DISPLAY HOLD HOLD TRACK DISPLAY DISPLAY DISPLAY...
Page 90 Theory of Operation— 2440 Service U540A, Q640, and associated circuitry are configured store the digitized samples. This type of operation is called as an operational amplifier capable of high current output. Fast-ln-Slow-Out (FISO) and is used at SEC/DIV settings This “op-amp" outputs a supply voltage as VCCODD to of 50 and faster.
Page 91 Theory of Operation— 2440 Service Figure 3-5. Simplified CCD architecture. 3 -4 9...
Page 92 Theory of Operation— 2440 Service output source follower amplifiers. The RESET clock 50 Q to view them. Using the standard 10 MO probe will discharges the output wells between output sample inter cause the signals to have a displayed rise time of about vals so that charge does not accumulate at the input to 30 ns;...
Page 93: Triggers And Phase Clocks
Theory of Operation— 2440 Service RESET DRIVER. This driver consisting of Q 551 is ident- A /B T rig g e r G e n e ra to r ical to the C Clock Driver states. It takes the RESET sig...
Page 94 Theory of Operation— 2440 Service Depending on the address written to, one of the follow and is ready to complete the acquisition. With EPTHO set ing actions may occur: HI, the trigger logic begins watching the trigger source (as defined by the control data byte), waiting for a trigger event to occur.
Page 95 Theory of Operation— 2440 Service CONTROL DATA BYTE A TI ONEVNT ABTRIG DON’ T CARE EVOEL SELEVENTS RECORD TRIGGER BITS JITTER TRIGGER BITS SOURCE SOURCE A TRIGGER A TRIGGER B TRIGGER END DELAY TIME END DELAY EVENTS END EVENTS B TRIGGER...
Page 96 Theory of Operation— 2440 Service The A TRI(a and R TRIG outputs from Q287 and Q288 FISO MODE. As explained in the CCD description, each are TTL-buffered versions of the corresponding trigger sig CCD is made up of two identical differential channels using nals and are routed to rear-panel BNC connectors.
Page 97 Theory of Operation— 2440 Service Table 3-6 Phase Clock Array Control Lines (CC3 through CCO) Control Bits Mode SEC/DIV Setting EXT CLK FISO 100 ns and faster FISO 200 ns FISO 500 ns FISO 2 /us FISO FISO FISO 10 M S...
Page 98: Jitter Correction Ramps
Theory of Operation— 2440 Service summing-node voltage is applied to U590B on pin 6 where JITTER CORRECTION RAMPS it is compared to the zero-volt clamp level (ground) on pin 5. When the summing node attempts to go below ground The Jitter Correction Ramps located on diagram 12 are...
Page 99 Theory of Operation— 2440 Service RAMP (JTRIG) SLRMP1 SLRMP2 JIT COR RAMP 1 JIT COR RAMP 2 START1 START2 ST0P1 ST0P2 Figure 3-7. Jitter Correction waveforms. 3 -5 7...
Page 100: Trigger Holdoff, Jitter Counters, And Calibrator
Theory of Operation— 2440 Service the opposite edge of the sample clock. The RAMP2 Jitter linearly charge a capacitor (one-of-two selectable cap Correction Counter produces a count defining the trigger values). The resulting integrator output is a linear ramp point relative to the opposite edge of the sample clock.
Page 101 Theory of Operation— 2440 Service with the capacitance value, of the integration capacitor, HOREF (holdoff reference) level, the output of ramp com determines charge rate (slope) of the holdoff ramp; and parator U871 will go LO. This resets flip-flop U872A of the thereby, the holdoff time.
Page 102 Theory of Operation— 2440 Service LO. This LO turns Q781 off and allows the selected Initially, the upper eight bits of the RAMP1 Counter current source(s) to charge the capacitors. At the same (composed of U852A and U852B) are held reset by the HI...
Page 103: Ccd Output
Theory of Operation— 2440 Service C alibrator C C D O II signal outputs from U450 pass Gain-Cell board (diagram 14A), where they are applied to The Calibrator circuit is composed of U731, U831, the bases of U111A, U111B, U111C and U111D via R113 Q831, and associated components.
Page 104: A/D Converter And Acquisition Latches
Theory of Operation—2440 Service Selection of the CH 1— Side 1 current signal to be The A2D REF voltage (— 0.5 V) is amplified and MSlI digitized by the A/D Converter is controlled by the inverted by U880 to produce the 1.5 V reference voltage (Multiplexer Select-Channel 1—...
Page 105: Display And Attributes Memory
Theory of Operation— 2440 Service Acquisition Latch Switching lines. The Q outputs of the flip-flops control output ena bling of the four latches, causing the Acquisition Latch NORMAL MODE ACQUISITIONS. non-envelope corresponding with the selected CCD output (CH 1 or...
Page 106 Theory of Operation—2440 Service Vertical D isplay RAM Data that may be stored in the Horizontal Display RAM includes two 512-point waveforms and IK 8 of readout Vertical Display U431 stores vertical- information. During a waveform display, the data output deflection data for four 512-point waveforms.
Page 107 Theory of Operation— 2440 Service and writing a LO to the YON output of the register. Now, Volts Cursor Register data addressed in the Horizontal RAM is applied to the Volts Cursor Register U241 is an address-decoded Vertical DAC to produce vertical waveform deflections.
Page 108: Display Control
Theory of Operation— 2440 Service memory space (stored in the Horizontal RAM). To display V ertical DAC the readout, the Readout State Machine sequentially Vertical DAC U142 generates complementary vertical- reads through the readout memory and displays the deflection currents used to drive the vertical deflection sys...
Page 109 Theory of Operation— 2440 Service latched bits are used as enables to other portions of the The 5 MHz clock signal from the Time Base Controller display circuitry and control the overall function of the circuit is buffered and inverted by U413C and is used to display.
Page 110 Theory of Operation—2440 Service enables U220. Due to a two-gate propagation delay three lower AND gates within U313 are LO, thereby ena through U222 to the RCO output, U220 will still be bling the output AND gate (it has inverting inputs). With enabled on the rising edge of the next clock.
Page 111 Theory of Operation— 2440 Service The DISDN signal is also sent to the System Inter For cursor displays, the HI DISPLAY signal enables D rupt Logic to tell it when the currently assigned display flip-flop U414B, and the 250 kHz clock begins clocking the task is complete.
Page 112 Theory of Operation— 2440 Service a line (only the center 40 are displayed) and the next four D2— AND gate U233A watches for the 12th character LSBs are applied to the Vertical DAC to select 1-of-16 address (11). display lines.
Page 113 Theory of Operation— 2440 Service " ) start READOUT I POWER UP STATE-MACHINE NOTE: TIME BETWEEN "STATES", WHETHER CLOCKED OR LOADED, IS 200ns U231 ( 1 CLOCK CYCLE) HELD RESET NOTE: "DISPLAY" "STATE" ADDRESS TO GOES HI U232 AND U330 -"0"...
Page 114 Theory of Operation— 2440 Service data selector U230 is enabled. The three data bits (01 clock. State disables U230, terminating test through 03) from U232 define which condition needs to be condition. tested and selects one of the D inputs of U230 to route to U231 via the COUNT/LOAD line.
Page 115: Display Output
Theory of Operation— 2440 Service DISPLAY OUTPUT Current from the Vertical DAC output connected to pin 3 of U170 develops a voltage across R163. This volt age causes the output of U 170 to move in the same direc The Display Output circuits (diagram 18) convert the...
Page 116 Theory of Operation—2440 Service input (pin 2) causes the output (pin 6) of U281 to move in (applied to pin 2 of U281A). This difference voltage is sam the opposite direction. This voltage change is applied to pled and stored on Hold Capacitor C260 where it sets a...
Page 117: Supply And C R T
Theory of O peration—2440 Service To produce a vector display of a waveform, the System S p o t-W o b b le C o rre c tio n Processor selects the X I a n d Y l inputs of U290. This routes The Spot-Wobble Correction circuit provides a dynamic the outputs from the Vertical and Horizontal Vector Genera...
Page 118 Theory of Operation-2 4 4 0 Service transformer primary winding. The increasing magnetic field er. The increased energy in the resonant circuit increases induces an in-phase voltage in the base-drive winding that the secondary voltages until the Cathode Supply voltage returns to the balanced condition (0 V across C260).
Page 119 Theory of O peration—2440 Service A n o d e M ultiplier the two lenses as the FOCUS control is adjusted during use of the instrument. Anode Multiplier circuit (also contained High-Voltage Module CR565) uses voltage multiplication to A u to FOCUS produce the + 1 4 kV CRT anode potential.
Page 120 Theory of Operation—2440 Service Figure 3-10. DC Restorer. 3-78...
Page 121 Theory of Operation—2440 Service Transistor Q640 is configured as a shunt-feedback plate of capacitor C through R443, CR442, and R546; the amplifier with R645, C639, and R639 (C639 and R639 for level on the negative plate is set by the CRT cathode voltage instruments with serial numbers B012403 and above) and through resistor E and diode A.
Page 122: System I/O
IEEE 488-1980 Standard using protocols path “catches up” to handle the DC and low-frequency defined in the Tektronix GPIB Codes and Formats Standard. components of the Z-Axis drive signal. Neon lamps DS490 and DS491 prevent arcing inside the...
Page 123 Theory of Operation— 2440 Service SOURCE ACCEPTOR 4 9 1 7 - 1 2 Figure 3-11. GPIB data flow diagram. 3-81...
Page 124 + 3 V via R108. (The + 5 Volt supply is only device other than the 2440 on the bus. zener-regulated by R105 and VR 105 to provide the + 3 Volt collector supplies for Q104 and Q107.)
Page 125 Theory of Operation— 2440 Service trigger level at pin 2 of U274. This sets the output applied put of OR-gate U132A LO. This LO enables the upper-four to the base of Q594 LO, turning the transistor off, and buffers of the Octal Buffer U120. With the Q-output of sets the discharge output at pin 7 to ground potential.
Page 126: Video Option
Theory of Operation— 2440 Service cuitry. The latched setting in the register is held until a 1. Selection of trigger field (Fieldl or Field2). different mode is needed. Programmable counters, also under System processor control, count the extracted hor 2. Choice of triggering on positive- or negative-sync izontal sync pulses (lines) until the line number for the input signals (NEG-SYNC).
Page 127 Theory of Operation— 2440 Service signal applied, the channel resistance of Q514 is minimum, SYNC PICKOFF COMPARATOR. Sync-Pickoff setting the gain of the AGC Amplifier to maximum. With Comparator, composed of Q504 and Q510, switches when the amplitude of a sync pulse crosses the comparator...
Page 128 Theory of Operation— 2440 Service CLOCK FREE RUN. If non-NTSC standard television Transconductance Amplifier U504 is enabled by turning transistor U410A off on the falling (trailing) edge of the signals are being used, the vertical-sync block may not be serrated. To maintain the proper horizontal-sync rate dur...
Page 129 Theory of Operation— 2440 Service HCLK H0R1ZCLK DLY'D HCLK c o m p s y n c VERT SYNC AND ^HORIZONTAL SYNC- • > { " « — EQUALIZATION- - EQUAL IZATI ON - SERRATIONS VERTSYNC JLJLJL U308-6 JT_JT_JT_JT_JT_J"LJT n j U L ^...
Page 130 Theory of Operation— 2440 Service 3 -8 8...
Page 131 Theory of Operation— 2440 Service slight lag prevents the possibility of jitter in the HORIZCLK DELAYED HORIZONTAL CLOCK. The Delayed Hor signal going to clock TV Trigger flip-flop U524B. izontal Clock (DLY'D HCLK) is used to remove alternate equalizing pulses...
Page 132 Theory of Operation— 2440 Service vertical-sync rising edge always_occurs during a HI portion To differentiate it from the GPIB circuitry (which also of the HCLK signal, and the Q output of U310B will be answers for the same block of decoded addresses), the clocked HI;...
Page 133 Theory of Operation— 2440 Service Since, by definition, System-M fields begin numbering each holdoff interval. The resulting display will be stable lines three lines before the vertical field-sync occurs, and with respect to horizontal sync pulses but will not be due to the line-adjustment requirements described above, stable with respect to the vertical sync pulses.
Page 134: Low-Voltage Power Supply
Theory of Operation— 2440 Service Offset Buffer. With FET Q710 turned off via U710A, the Offset Buffer Amplifier U710D applies this “stored” offset line to the Channel 2 Vertical Preamplifier is open offset level to the Channel 2 Preamplifier (via Q710), shift...
Page 135 Theory of Operation— 2440 Service Spark-gap electrodes E609 and E616 are surge voltage age supply for the + 1 2 V regulator stage formed by Q836, protectors. If excessive source voltage is applied to the VR929, R240, and R640. With Q240 on, R244 is placed in...
Page 136 Theory of Operation— 2440 Service Figure 3-15. PWM Regulator and Inverter. 3 -9 4...
Page 137 Theory of Operation— 2440 Service the + 5 V Inverter Feedback amplifier (U189, diagram 23) PREREGULATOR START-UP. As the supply for the and is directly related to the level of the + 5 VD supply Preregulator control 1C is established, an internal oscillator begins to run.
Page 138 Theory of Operation— 2440 Service Figure 3-16. PWM switching waveforms. 3-96...
Page 139 Theory of Operation— 2440 Service PRIMARY OVER-CURRENT SENSING. The primary that the Q output of U829A is held high long enough for current of T639 through R727 produces a voltage signal soft-start capacitor C l 28 and Control Power Supply that is filtered by R728 and C728 to remove high- capacitor C244 to fully discharge.
Page 140: Low-Voltage Regulators
Theory of Operation— 244Q Service reference level. In order to maintain a stable supply volt signal HI. Through the PWRUP signal circuitry, a HI LINE age, the reference voltage must itself be highly stable. The UP signal tells the System P that ample line voltage is circuit composed of U180, U170B, U900, and associated available for normal instrument operation.
Page 141 Theory of Operation—2440 Service + 8 V Regulator + 5 V R egulator The + 8 V Regulator is composed of Q465, Q479, Regulation of the + 5 V supply is provided by a circuit U470A, U470B, and the associated components. The cir...
Page 142 Theory of Operation— 2440 Service going to the main board and a small series resistor in the Operational amplifier U189A is configured as a com line (R121 on the Main board) causes the actual output parator referenced to + 1 0 V REF . When adequate power...
Page 143: Performance Check And Functional Verification Procedure
Perform the SELF-CAL procedure before doing this procedure. Refer to the Self Calibration procedure in Section 5 of this manual. A demonstration procedure of SELF-CAL is given in the 2440 Operators manual in Section 2, and a detailed description of the built-in calibration and diagnostics is given in Appendix A.
Page 144 Performance Check and Functional Verification Procedure 2440 Service Table 4-1 Test Equipm ent Exam ples of Suitable Description Minimum Specification P urpose Test Equipm ent Leveled Sine-Wave Frequency: 250 kHz to above Vertical, horizontal, and TEKTRONIX SG 503 250 MHz. Output amplitude:...
Page 145 Oscillator.® operation. into 75 f l . 21. Pulse Generator Check Auto Setup. TEKTRONIX P G 502 Pulse Period Range: 1 ms to 2 jxs. Generator.® Pulse Range: 0.5 ms to 1 ps. Amplitude variable from - 5 to + 5 V, independent pulse top and pulse bottom.
Page 146: Initial Setup
Performance Check and Functional Verification Procedure 2440 Service BEFORE PERFORMING TH E REMAINDER OF TH IS Select PRGM to display the AUTOSTEP SEQUENCER PROCEDURE, TH E “INITIAL S ETU P ” AT menu. Press SAVE in the main menu to display the BEG INNING OF THE PROCEDURE STEPS.
Page 147 Performance Check and Functional Verification Procedure 2440 Service Push the front-panel button PRGM. This will bring NOTE up the action selection menu. The following steps turn the Trigger Point Do not select any actions. Push the menu button Indicator (a small “T" displayed on waveforms) labeled SAVE SEQ to store the sequence under the and the BELL on for use in this procedure.
Page 148: Vertical System
Performance C heck and Functional Verification Procedure 2440 Service VERTICAL SYSTEM Equipment Required (see table 4-1) Leveled Sine-Wave Generator (Item 1) 10X Attenuator (Item 13) 5X Attenuator (Item 14) Calibration Generator (Item 3) 2X Attenuator (Item 15) Power Supply (Item 6)
Page 149 Performance Check and Functional Verification Procedure 2440 Service Select: CH 1 COUPLING/INVERT Increase the Power Supply output level until the CH 1 trace rises to the center graticule line (+ 2 0 V). Set: 50 f t ON | OFF...
Page 150 Performance Check and Functional Verification Procedure 2440 Service 3. Check CH 1 and CH 2 VOLTS/DIV Display and Push the CURSOR SELECT button to select the Readout Accuracies. Check the A and B other cursor (it will change from solid to seg...
Page 151 Performance Check and Functional Verification Procedure 2440 Service 18. Set the TRIGGER LEVEL control for a stable dis 29. Use the VERTICAL POSITION control to set the bottom of the signal 3 divisions below grati play. cule center. 19. Press the A/B TRIG button to set the B Trigger System on.
Page 152 Performance Check and Functional Verification Procedure 2440 Service Table 4-2 Accuracy Limits CH 1 and CH 2 CURSOR VOLTS Readout and A and B TRIGGER Readouts VOLTS/ Standard Amplitude CURSOR VOLTS Readout Accuracy TRIGGER LEVEL Readout Control NORMAL MODE ENVELOPE MODE Limits-DC Coupling (2% + 0.04 div)
Page 153 Perform ance Check and Functional Verification Procedure 2440 Service Check LF Linearity. 51. Remove 50 0 Coaxial Cable from CH 2 OR Y input connector and connect the 5 V Recall the Initial Front-Panel Setup, labeled “FPNL” standard amplitude signal to CH 1 OR X and (see step i in “INITIAL S ETU P ”...
Page 154 Performance Check and Functional Verification Procedure 2440 Service 5. Check CH 1 and CH 2 Position Range. Check CH 1 and CH 2 Bandwidth and Bandwidth Limit (20 MHz and 100 MHz). Recall the Initial Front-Panel Setup, labeled “FPNL” Recall the Initial Front-Panel Setup, labeled “FPNL”...
Page 155 Perform ance Check and Functional Verification Procedure 2440 Service Increase the Leveled Sine-Wave Generator’s output NOTE frequency until the display amplitude is 4.2 divisions. When the Initial Front Panel Setup is recalled in part a, the CH 1 and CH 2 traces will be C H E C K -T h a t the Leveled Sine-Wave Generator’s out...
Page 156 Performance Check and Functional Verification Procedure 2440 Service m. Set both VOLTS/DIV controls to 100 mV, the SEC/DIV 8. Check Channel Isolation. control to 2 ns. Select TRIGGER SOURCE and set Recall the Initial Front-Panel Setup, labeled “FPNL” CHAN 1 |2 t o 1 .
Page 157 Performance Check and Functional Verification Procedure 2440 Service Using the CURSOR/DELAY control, align the movable 10. Check Display Versus Graticule Centering and cursor (segmented) to the top of the CH 1 waveform. Dot Versus Vector Display Offset. Check VECTOR Response for NORMAL and Press CUR SO R/SELECTto enable the alternate cursor.
Page 158 Performance Check and Functional Verification Procedure 2440 Service Select STORAGE A CQ UIRE and set ENVELOPE on. Press the SELECT button (next to the INTENSITY Repeatedly press the ENVELOPE menu button until control). C O N T (Continuous) appears above the label.
Page 159: Triggering Systems
Performance C heck and Functional Verification Procedure 2440 Service TRIGGERING SYSTEMS NOTE The CH 1 and CH 2 Trigger Level Readout Accuracies are checked in the Vertical Systems subsection. In this procedure, a “stable trigger" refers to a consistent trigger; that is, one that results in a uniform, regular display triggered on the selected slope ( ±) .
Page 160 Perform ance C heck and Functional Verification Procedure 2440 Service Table 4 -3 M inim u m D is p la y L evel fo r C H 1 o r C H 2 T rig g e rin g...
Page 161 Performance C heck and Functional Verification Procedure 2440 Service Press A/B TRIG to select the B Trigger System (the B Connect the sine wave output of the appropriate COUPLING menu will be displayed). generator through a 50 O Coaxial Cable, a 5X Attenua...
Page 162 Performance Check and Functional Verification Procedure 2440 Service Select TRIGGER SO U RC E and push the EXT menu Select TRIGGER CPLG and repeat part j to check A button. Set A and B EXT GAIN to EXT 1-j-5 on in the EXT 1-i-5 coupling, menu displayed.
Page 163 Performance Check and Functional Verification Procedure 2440 Service If trigger sensitivity was near the specified limits for the C h e c k A * B T rig g e r S o u rc e . EXT 1 or EXT 1-F5 sources with the trigger coupling set Recall the Initial Front-Panel Setup, labeled “FPNL”...
Page 164 Performance Check and Functional Verification Procedure 2440 Service V E R IF Y -T h a t for settings which are less (more nega 5. Check Trigger Noise Rejection. tive) than approximately 200 mV the display is not Recall the Initial Front-Panel Setup, labeled “FPNL”...
Page 165 Perform ance C heck and Functional Verification Procedure 2440 Service Position the start of the display to the extreme left WARNING graticule line using the HORIZONTAL POSITION control. DO NOT connect the 10X Probe ground lead to Select TRIG POSITION and set Vs on.
Page 166: Horizontal System
Performance Check and Functional Verification Procedure 2440 Service HORIZONTAL SYSTEM Equipment Required (see table 4-1) Time-Mark Generator (Item 4) 50 f t Precision Coaxial Cable (Item 11) 50 f t Coaxial Cable (Qty 2) (Item 10) 50 f t Termination (Item 12) 1.
Page 167 Perform ance Check and Functional Verification Procedure 2440 Service Set the Time Mark Generator’s marker period to match Use the HORIZONTAL POSITION control to align the the acquisition rate set in the last part. Trigger Point Indicator (a small “T ” on the displayed trace) to the vertical graticule line 3 divisions left of m.
Page 168 Perform ance Check and Functional Verification Procedure 2440 Service Use the VERTICAL POSITION controls to position the R otatetheC U R S O R /D E LA V controltosetthe A DELAY CH 1 and CH 2 displays for easy viewing.
Page 169: Additional Verifications And Checks
Performance C heck and Functional Verification Procedure 2440 Service ADDITIONAL VERIFICATIONS AND CHECKS Equipment Required (see table 4-1) Calibration Generator (Item 3) Dual-Input Coupler (18) Digital Voltmeter (DMM) (Item 7) BNC Female-to-Dual Banana Adapter (Item 19) GPIB Controller* Sine-Wave Oscillator (Item 20)
Page 170 Performance Check and Functional Verification Procedure 2440 Service 2. Verify the Cursor Units and Functions. Set A | ABS to ABS. V ER IFY —That the cursor readout indicates approximately 180.00°. NOTE Set % on. V E R IF Y -T h a t the cursor readout indicates This check VERIFIES the functionality of the approximately 50.00% .
Page 171 Performance C heck and Functional Verification Procedure 2440 Service 3. Verify STORAGE SAVE Functions. 4. Verify Auto Setup. NOTE Recall the Initial Front-Panel Setup, labeled “FPNL" In this step, certain parts will require that you do (see step i in “INITIAL SETUP" at the start of this an Auto Setup on a waveform to verify specific, procedure).
Page 172 Perform ance Check and Functional Verification Procedure 2440 Service Set RES HI | LO to HI in the Auto Setup menu. Push the front-panel button labeled AUTO to do an Auto Setup on the input waveform for CH 1. Push AUTO. V E R IF Y -T h a t the waveform is displayed...
Page 173 Perform ance Check and Functional Verification Procedure 2440 Service ad. Set the RES HI | LO to HI. Push menu item AGAIN. VER IFY—That SNAPSHOT readout updates the parameters (P-P and TOP are now ae. Push AUTO. VERIFY—That the falling (negative-going) about 200 mV).
Page 174 Performance C heck and Functional Verification Procedure 2440 Service 6. Verify Operation of the AutoStep Sequencer. V E R IF Y -T h a t the SET STEP ACTIO NS for Step 1 is displayed. Recall the Initial Front-Panel Setup, labeled “FPNL”...
Page 175 RECALL menu following parts of this step only give some is returned. examples of commands you can have your controller send to the 2440 over the GPIB Bus to ak. Push EXIT. V ER IFY —That the main AUTOSTEP verify the GPIB Interface in this Instrument.
Page 176 Performance Check and Functional Verification Procedure 2440 Service Ask for the user to enter the 2440’s GPIB address. Set: 50 f l ON | OFF (This was set to 1 in part o.) Select: CH 2 C OUPLING/INVERT Have the user send the command RQS ON.
Page 177 Perform ance C heck and Functional Verification Procedure 2440 Service 9. Check Square-Wave Flatness (Video Option Move the test setup from the CH 2 OR Y input connector 05 only). to the CH 1 OR X input connector. Set the CH 1 VOLTS/DIV control to 5 mV.
Page 178 Performance Check and Functional Verification Procedure 2440 Service Set: CH 1 VOLTS/DIV 10 mV Move the 50 A Coaxial Cable from the CH 1 OR X input CH 2 VOLTS/DIV 10 mV connector to the CH 2 OR Y input connector. Insert the two 10X attenuators back into the test setup.
Page 179 Performance C heck and Functional Verification Procedure 2440 Service NOTE 13. Check Sync Separation ( ± SLOPE) Video Option 05 only). An easy method of checking the expanded 60-Hz sine wave's amplitude is to observe the Recall the Initial Front-Panel Setup, labeled “FPNL"...
Page 180 Performance Check and Functional Verification Procedure 2440 Service Press CURSOR SELECT and use the CURSOR/DELAY Connect the composite sync output of a Sync Genera control to adjust the right-most cursor for a readout tor to the CH 1 OR X input connector via a 75 f t Coaxial value of 13.000 n-s.
Page 181 Performance Check and Functional Verification Procedure 2440 Service Recall the Initial Front-Panel Setup, labeled “FPNL” NOTE (see Step i in “INITIAL SETUP" at the start of this procedure). By switching A VIDEO COUPLING (SET VIDEO menu) between FIELD 1, FIELD 2, and ALT, it is...
Page 182 Perform ance C heck and Functional Verification Procedure 2440 Service F ailureofth eS E L F TE S Tthatru nsw h en Erase Memory V ER IFY—Internal memory status: After the SELF TEST is executed—even for reasons not related to internal...
Page 183: Adjustment Procedure
Section 5— 2440 Service ADJUSTMENT PROCEDURE INTRODUCTION IMPORTANT— PLEASE READ BEFORE USING THIS PROCEDURE This procedure is used to return the instrument to con Display Adjustments in "Internal Adjustments" subsec formance with its “Performance Requirements” as listed in tion). The instrument cabinet must be installed and the the "Specification”...
Page 184: Preservation Of Instrument Calibration
Adjustment Procedure— 2440 Service CONSTANTS BY USERS IS RECOMMENDED. Perfor PRESERVATION OF INSTRUMENT mance of a Self Calibration only, without performance of CALIBRATION either of the other two subsections, does not require the removal of the jumper or cabinet. Both the Internal Adjustments and External Calibration subsections require enabling the EXTENDED CALIBRA...
Page 185: Internal Adjustments
Adjustment Procedure— 2440 Service INTERNAL ADJUSTMENTS Equipment Required (See Table 4-1): 10X Attenuator (Item 13) Primary Leveled Sine-Wave Generator (Item 1) Secondary Leveled Sine-Wave Generator (Item 2) 5X Attenuator (Item 14) Dual-Input Coupler (Item 18) Calibration Generator (Item 3) Coaxial Cable (Item 10)
Page 186 Adjustment Procedure— 2440 Service NOTE o. ADJUST— R200 (Geometry control) for the least curvature overall of the display lines at the vertical and When the Spot-wobble compensation is badly out of horizontal edges of the crt screen. adjustment, three dots will be visible at each of the 33 dot locations.
Page 187 Adjustment Procedure— 2440 Service HORIZONTAL SIDES STEP Z procedure steps affecting those components. ADJl ST: HOFF IN ' VOFF HVEdtr v v ECCT Typical display (No. 5) when horizontal and vertical offsets, gains and vector compensations are correctly adjusted. 4917-16...
Page 188 Adjustment Procedure— 2440 Service v. ADJUST— R276 (Vertical Vector Compensation con trol) to align the 3 vertically oriented dots of the small cross pattern to the vertical vector of the large cross pattern. w. ADJUST— R376 (Horizontal Vector Compensation control) to align the 3 horizontally oriented dots of the small cross pattern to the horizontal vector of the large cross pattern.
Page 189 Adjustment Procedure— 2440 Service d. Preset Common-Mode counts: b. Preset clock adjustments: Center all adjustment controls shown in Figure 5-4 so they are halfway between full clockwise and full counter-clockwise rotation. Display GN-DAC counts: VOLTS/DIV control to 50 mV, and set the SEC/DIV to 500 ns.
Page 190 Adjustment Procedure— 2440 Service C C D C L O C K A D J U S T M E N T S CH 1 CH 2 8449 R448 H I | ® j « f ® [ ® ] [ ®...
Page 191 Adjustment Procedure— 2440 Service 4. Set CM/G N-DAC counts, CH 1 side 2 and 4, Do a SELF CAL and verify initial CCD gain: Skip at 500 ns: Push the left-most menu button to move to, and perform, the procedure found under SELF CALI...
Page 192 Adjustment Procedure— 2440 Service GN-DAC counts check: SEC/DIV should be horizontally align its rising edge to center screen. Position the top of the waveform to 3.5 divisions set to 500 ns. Push MENU OFF/EXTENDED FUNC below center graticule. Push ACQUIRE and set TIONS twice;...
Page 193 Adjustment Procedure— 2440 Service For SN B010250 & Above g. Check for correct CCD operation: 3. Input test signal: Connect the output of the secondary Leveled Sine-wave Generator (Item 2) to 1. Display GN-DAC counts: Push MENU the CH 1 and CH 2 input connectors via a precision...
Page 194 Adjustment Procedure— 2440 Service For SN B010249 & Below to the Extended Functions menu; push SPECIAL and, when the menu changes, push CCD sides. 2. Set up test signal: Set the generator output level for about a 6-division display at a frequency of...
Page 195 Adjustment Procedure— 2440 Service 1 and 3 for CH 1. When setting the L clocks to align any and k, using the CH 2 L-clock adjustments to align the two given sides, set for equal alignment between the rising CH 2 CCD sides.
Page 196 Adjustment Procedure— 2440 Service Align an even CH 2 CCD side to an odd: Position screen. Push the MENU OFF/EXTENDED FUNC CH 1 up off screen and CH 2 on. Adjust the CH 2 L I D for TIONS button twice; then push SPECIAL; then push best alignment of SIDE 1 and SIDE 2.
Page 197 Adjustment Procedure— 2440 Service For SN B010249 & Below When making an adjustment after a failed check, start by adjusting TID and then TIS, continuing with A2S and A2D only if needed. Adjustment of these controls is best determined by trial: Start with TID ------- and “rock”...
Page 198 Adjustment Procedure— 2440 Service NOTE For SN B010249 & Below Mainly check the falling and rising parts of the Check/adjust CH 2 A and T clocks: Push sine wave, rather than the peaks, since the VERTICAL MODE and set CH 1 off and CH 2 on in amplitude may differ somewhat between chan...
Page 199 Adjustment Procedure— 2440 Service 3. Alias display: Vary the generator output fre quency slightly (if required) until only one or two cycles of the untriggered sine wave are displayed NO MORE THAN 1 VE RTICAL (about ± 1 0 0 KHz).
Page 200 Adjustment Procedure— 2440 Service f. ADJUST— C414 (near the front edge of the Main Adjust CH 1 transient response: Adjust R436, board) for the same waveform front comer as noted in C456, and R525 for best front-corner. (These adjustments part d.
Page 201 Adjustment Procedure— 2440 Service e. Match CH 1 bandwidth at remaining VOLT/DIV Adjust settings: bandwidth: Install a 5X attenuator between the 10X attenuator and the CH 1 input. Perform subparts 4 and 5 for the 50-mV, 10-mV, 5-mV, and 2-mV set...
Page 202 Adjustment Procedure— 2440 Service e. Move the test setup to the CH 2 input connector. f. Select VERTICAL MODE and set CH 2 on and CH 1 off. f. Select VERTICAL MODE and set CH 2 on and CH 1 off.
Page 203 Adjustment Procedure— 2440 Service a. First, power the scope off. Then, perform subparts moves up slightly. Adjustment is correct when the output b-f of part 3 of the Removal and Replacement procedure is not overdriven, with the IRE pedestal missing on the ris...
Page 204: Self Calibration
Adjustment Procedure— 2440 Service SELF CALIBRATION Equipm ent Required: None 1. Self Calibration NOTE a. Turn the instrument POWER and allow a After successful completion of the automatic calibra 10 minute warm-up period. Note that the instrument's tion routine, “RUNNING’ will disappear from the cabinet should be in place when performing this subsection CRT screen and “PASS’...
Page 205: External Calibration
Adjustment Procedure— 2440 Service EXTERNAL CALIBRATION Equipm ent R equired (se e T a b le 4-1): Calibration Generator (Item 3) Press the ATTEN GAIN button again. (“RUN N O T E NING” will be displayed near the lower right corner of J 1 5 6 m u s t b e re m o v e d (s e e s te p 1, p a rt a o f In te rn a l the screen.)
Page 206 Adjustment Procedure— 2440 Service Repeat parts a through i. If the instrument Recheck the test setup and ensure that the Cali fails the Attenuator Gain Calibration sequence again, bration Generator is set for a fast rise output. Reper refer the...
Page 207 Adjustment Procedure— 2440 Service Press the menu button labeled EXT CAL to display N O T E the EXT CAL menu. Then press the menu button labeled A fte r s u c c e s s fu l c o m p le tio n o f th e T rig g e r C a lib ra tio n CTE CAL.
Page 209: Maintenance
Section 6— 2440 Service MAINTENANCE This section presents descriptive information about instrument calibration as well as preventive maintenance, corrective maintenance, and troubleshooting information. Circuit board removal procedures are included in the “Corrective Mainte nance” subsection. An extensive diagnostics procedures table (Table 6-6) is in the “Diagnostics” subsection at the back of this section.
Page 210: National Bureau Of Standards Traceability
Maintenance— 2440 Service M anual A djustm ents (ATTEN) and external trigger amplifiers (TRIGGER) with an NBS traceable voltage reference. As the fine gain adjust Adjustments requiring internal access to the scope are ment of the attenuators is made, the relative accuracy of...
Page 211: Static-Sensitive Components
Maintenance— 2440 Service operating temperature since the last SELF CAL was done, Hard Failures or hard failures caused by component problems in the A hard failure affecting calibration may also be indicated instrument’s circuitry that prevent calibration. by the loss of SELF CAL, but running the SELF CAL rou...
Page 212: Preventive Maintenance
INSPECTION. Inspect the internal portions of the scope water. Before using any other type of cleaner, con for damage and wear, using Table 6-3 as a guide. sult your Tektronix Service Center or representative. Deficiencies found should be repaired immediately.
Page 213 Maintenance— 2440 Service corrective procedure for most visible defects is obvious; however, particular care must be taken if heat-damaged components are found. Overheating usually indicates other trouble in the instrument; it is important, therefore, E x c e p tio n s to th e fo llo w in g cle a n in g p ro c e d u re a re that the cause of overheating be corrected to prevent th e C H 1 a n d C H 2 A tte n u a to r a s s em b lies.
Page 214: Lubrication
Maintenance— 2440 Service Table 6-3 Internal Inspection Check List Item Inspect For Repair Action Clean solder corrosion with an eraser and Circuit Boards Loose, broken, or corroded solder connec flush with isopropyl alcohol. Resolder defec tions. Burned circuit boards. Burned, bro...
Page 215: Troubleshooting
Maintenance— 2440 Service TROUBLESHOOTING INTRODUCTION reference numbers (enclosed in hexagonally-shaped boxes) are also shown on each diagram. Waveform illustrations Preventive maintenance performed on a regular basis are located adjacent to their respective schematic diagram. should reveal most potential problems before an instru...
Page 216 Maintenance— 2440 Service Troubleshooting Charts for the individual pins or wires distributing the supplies. By referencing the numbers for the assembly and its connec troubleshooting charts contained tor wire(s), the diagram showing that section of the power "Diagrams” section are to be used in conjunction with the distribution path immediately preceding the section illus...
Page 217: Troubleshooting Equipment
M aintenance— 2440 Service TROUBLESHOOTING EQUIPMENT 3 . C h e c k C o n tro l S e ttin g s Incorrect control settings can give a false indication of The equipment listed in Table 4-1 of this manual, or instrument malfunction.
Page 218 After the trouble has been isolated to a particular cir Before measuring ac ripple, set the STORAGE ACQUIRE cuit, again check for loose or broken connections, improp mode of the 2440 to SAVE. Use a IX probe having as erly seated...
Page 219: Corrective Maintenance
“ Repackaging for Shipment” Use an isolation transformer to supply power to the information in Section 2 of this manual. 2440 if removing the shield and troubleshooting in the power supply. MAINTENANCE PRECAUTIONS To reduce the possibility of personal injury or instru...
Page 220: Maintenance Aids
If the connectors are faulty, the entire wire assembly In addition to the standard electronic components, should be replaced. many special parts are used in this scope. These com ponents are manufactured or selected by Tektronix, Inc. to meet specific performance requirements, or are manufac Multipin Connectors tured Tektronix, Inc.
Page 221 M aintenance— 2440 S ervice T able 6-5 M aintenance Aids Exam ple Description S pecification Usage General soldering and Antex Precision Model C. 1. Soldering Iron 15 to 25 W. unsoldering. Assembly and disassembly. Tektronix Part Numbers: Torx tips # T 7 , # T 9 , 2.
Page 222: Soldering Techniques
Use rosin-core wire solder containing 63% tin and 37% lated from the chassis by a heat-transferring mounting lead. Contact your local Tektronix Field Office or repre block. Reinstall the mounting block and bushings when sentative to obtain the names of approved solder types.
Page 223: Removal And Replacement Procedure
M aintenance— 2440 Service N O T E Cut off any excess lead protruding through the cir cuit board (if not clipped to the correct length in Step 3). S o m e c o m p o n en ts a re d iffic u lt to re m o v e from the c irc u it b o a rd d u e to a b e n d p la c e d in th e c o m p o n e n t le a d s durin g m ach in e in sertio n .
Page 224 Maintenance— 2440 Service A12— PROCESSOR BOARD Located near the back on the A10— Main board bottom (component) side. 6603-32 Figure 6-2. Circuit Board Location. 6-16...
Page 225 M aintenance— 2440 Service 1. C abinet R em oval W A R N I N G a. Disconnect the power cord from any ac power source. T he lin e -re c tifie r c a p a c ito rs n o rm a lly re ta in a c h a rg e...
Page 226 Maintenance— 2440 Service Using a 7/32 inch nutdriver, rotate the tw o black Grasp the left edge of the Timebase/Display board plastic retaining latches counterclockwise 1/4 turn to and rotate it (and the Top chassis) upward about 45 unlock them. The tw o retaining latches are located near degrees.
Page 227 M aintenance— 2440 S ervice c. Pull straight out on the INTENSITY control knob to p. Remove the anode lead from its retainer and dress remove it from its shaft. it away from the lower square hole in the Main chassis.
Page 228 Maintenance— 2440 Service e. Disconnect the tw o flex cable connectors a t J104 6. S id e Board R em oval and J108, and the ribbon cable connector at J105. J104, Perform Step 1 to remove the cabinet from the J105, and J108 are located near the right-front com er of instrument.
Page 229 M aintenance— 2440 S ervice Reverse parts a through I to install the Side board in Disconnect the remaining ribbon connector from the instrument. Take care to fit the rear edge of the board J105 on the Main board. to the channel notch when reinstalling to the chassis.
Page 230 Maintenance— 2440 Service Grasp the front of the Low Voltage Power Supply Disconnect the ribbon cable connector at J148 of bracket and lift up until the Low Voltage Power Supply the Timebase/Display board. board is clear of the retaining latches unlocked in part m.
Page 231 M aintenance— 2440 S ervice e. Disconnect the crt anode lead (male end) from the I. Remove the eight screws (two at each corner) secur ing the crt frame to the Front casting. high-voltage module lead. Discharge the crt anode lead by grounding its tip to the metal chassis.
Page 232 Maintenance— 2440 Service c. Perform parts c through i of Step 4 to remove the c. Insert the tip of a short screwdriver through the large slot in the front casting (above and right of the asso trim band from the instrument.
Page 233: Diagnostics And Internal Calibration Routines
M aintenance— 2440 Service DIAGNOSTICS AND INTERNAL CALIBRATION ROUTINES INTRODUCTION In addition to the calibration and diagnostic routines just mentioned, there are the “Special” diagnostic features, useful for instrument troubleshooting, and Service Rou tines which are usually used with the Extended Diagnos...
Page 234 Maintenance— 2440 Service < s ta tu s > < status> < s ta tu s > <w arm -up-m sg> EXT CAL SELF SELF Extended Calibration is an interactive procedure requir DIAG DIAG ing a Calibration Generator that produces accurate dc volt...
Page 235: Diagnostic Routines
M aintenance— 2440 Service a failure occurs, < S T A T U S > is immediately updated; (EXT DIAG). Both types can be executed from scope n o t rather, a new test must be run to determine current menus.
Page 236 Maintenance— 2440 Service Any individual test selected can be made to loop to Levels 3700 and 3800 may only be executed isolate signal path problems with external test and from EXT DIAG and then only if internal jumper measurement equipment, once the area of failure has been J156 is removed.
Page 237 M aintenance— 2440 Service again. If a failure prevents display of the EXT DIAG menu, you must turn off the scope and turn it back on again to T R IG 'D = 2 ° = 1 rerun the tests. It takes a little practice to read the failure codes from the LEDs.
Page 238 Maintenance— 2440 Service NOTE Pushing EXT DIAG displays the main Extend Diagnos tics menu (see Figure 6-5). In this menu, the top level test A diagnostics name in the Extended Diagnostics is listed as ‘ EXTENDED DIAGNOSTICS" and its level menu followed by an asterisk is not testable.
Page 239 M aintenance— 2440 S ervice NOTE level in the displayed menu) and pressing RUN/SEL selects another lower-level submenu where the 3500 level T he s ta tu s fo r s u b le v e l te s ts...
Page 240 Maintenance— 2440 Service The causes of a failure in the 6100-6300 bracket may the result of the sublevel Extended Calibration test, the be non-fatal to continued instrument operation, and normal EXT DIAG can be used to determine if it w as an EXT CAL (or near-normal) operation may be recovered by the user test that failed.)
Page 241 Maintenance— 2440 Service these new values are stored and then used to run the calibration constants. After a COLD START, a SELF CAL tests. One of the criteria for modifying these constants is and the ATTENuator, TRIGGER, and REPET EXT CAL ambient temperature.
Page 242: Diagnostics Operation Via The Gpib Interface
Maintenance— 2440 Service troubleshoot an internal fault using external testing and If an error occurs during SELFCal, it is reported to the measuring equipment. Where possible, the Extended Diag controller when the ERRor? query Is issued to the instru nostics routines are used for looping to allow access to ment.
Page 243: Diagnostic Procedures
Maintenance— 2440 Service These troubleshooting procedures are broken down into DIAGNOSTIC PROCEDURES several types. The Troubleshooting Procedures of Table 6-6 provides a description of the tests made, and in many cases, the troubleshooting procedure used in case of a The various tests resident in the scope are organized test failure.
Page 244 Maintenance— 2440 Service PLUG IN AND TURN ON _ NO. PROCEDURE 6 DEAD START _ ^ / X l S THE ' — PROCEDURE 5 THERE ANY CRT CRT DISPLAY GPIB OPERATION ^DISPLAY?__« N^NORMAL? 1 YES 1 YES PROCEDURE 3...
Page 245 Maintenance— 2440 Service Table 6-6 2440 Troubleshooting Procedures INITIAL INDICATIONS Are TRIGGER LEDs flashing? If all lights are flashing, suspect Waveform #tP ROM U480 or U490 TESTS FOR (diagram 2) or their selects. LIFE Is there activity from GPIB LEDs during turn-on? If the three LEDs above the crt (LOCK, SRQ, and ADDR) all light then go through a binary counting pattern (test number 2170), the diagnos...
Page 246 Maintenance— 2440 Service Table 6-6 (cont) Phase-Locked Loop Circuit (schematic diagram 11). TIMING ERROR AT 50 MS/div AND FASTER Check the 10-MHz input to U381 pin 6. If there is no 10-M Hz clock at TP174 then go to the Timebase troubleshooting chart (located in the “Diagrams”...
Page 247 Maintenance— 2440 Service Table 6-6 (cont) Check that STOP1 and STOP2 are present at U841 pin 12 and U842 pin 12 (on the Side board). These signals are not coincident and should be jittering with respect to one another. If missing, backtrack to U490 and/or U390 (located on the Main board and shown on diagram 12) to locate the defective component.
Page 248 Maintenance— 2440 Service Table 6-6 (cont) GPIB GPIB Test for Activity (schematic diagram 20): Press the OU TPU T menu button, then SETUP, then MODE. Select L/ONLY and see if the ADDR LED is on. Select T/L and see if the ADDR LED is off. Select T/ONLY and see if the ADDR again is on.
Page 249 MUXSEL2 at R800 pin 4. Set the SEC/DIV switch to 100 M s and the VOLTS/DIV to 2 V. Power on the 2440. When it does the power-on test, it will signal a test failure of 4300 on the Trigger LEDs, and there will be no display on the 2440 crt.
Page 250 Maintenance— 2440 Service Table 6-6 (cont) Check that both sides of the pot have equal output range (approximately 0 V to 5 V) and that the voltage level for each side of each pot moves smoothly from one extreme to the other as the pot is rotated through the continuous range (not its end-switching region).
Page 251 WORD Word Trigger (schematic diagram 20): TRIGGER Make sure the Word Trigger probe connector is properly installed (connector is on the 2440 rear panel). Select TRIG POSITION to 1/8, SEC/DIV to 100 and VOLTS/DIV to 2 V. Probe A12U754 pin 5 for clock pulses.
Page 252 Maintenance— 2440 Service Table 6-6 (cont) Force DAC Ranges FORCE DAC Values/ Voltage Range Effect of Output Output DAC Voltage After Increasing Value Location Cold Start 4095 C H lB al U641-7 2 0 4 8 /-0 .5 0 Trace shifts down - 1 .
Page 253 Maintenance— 2440 Service Table 6-6 (cont) Force DAC Ranges FORCE DAC V alues/ Voltage Range Effect of Output Output DAC Voltage After Increasing Value Location Cold Start 4095 CM20 U640-7 1 650/- 0 . 2 7 V + 4 .7 6 + 12.1...
Page 254 Maintenance— 2440 Service Table 6-6 (cont) HOLDOFF Trigger Holdoff Circuitry (schematic diagram 13): PROBLEMS Run Extended Diagnostic test 2600 for the SIDE-BOARD registers U761 and U762. If that fails, troubleshoot the indicated failure. If not, troubleshoot the Trigger Holdoff circuitry.
Page 255 Front Panel is locked up due to a front-panel failure or when there is no display visible. The importance of this is that the initial step of locating all problem areas is simplified when the 2440 can do it itself.
Page 256 (schematic diagram 17). If not correct, troubleshoot the Readout State Machine (see the "No Display" troubleshooting tree at the back of this manual). SYSTEM Test 3000— TRIG and READY LEDs on or Test 6000— READY and ARM LEDs on, and the 2440 Self HALTS IN Test has halted.
Page 257 Press PRGM and then press the fifth menu selection button to do a PANEL INIT. Connect the CALIBRATOR output signal to the CH 1 BNC using one of the supplied 10X coded probes. Set the 2440 VOLTS/DIV setting to 200 mV. Press SAVE on the 2440, then MENU OFF.
Page 258 Use the test scope to compare the circuit signals at the points indicated in schematic diagram 18 to the corresponding waveforms shown next to the diagram. (The HOLDOFF control will be of some use in obtaining a stable display if using an analog scope. If using a 2440 as the test scope, press SAVE to obtain a stable display, if necessary, for viewing.)
Page 259 Maintenance— 2440 Service Table 6-6 (cont) For tests 1200-1500, the sublevel test number and the numerical suffix in the test label indicate the page and ROM device the test is run on. For instance, the sublevel test ‘ 1320 ROMO.1-5” is run on page 5 of 16 possible pages, where page 5 is part of ROMO.1 (U682).
Page 260 Maintenance— 2440 Service T able 6-6 (cont) 1310 ROMO. 1-9 3rd quarter of A12U682 ( page 9 ) 1310 ROM O .I-D 4th quarter of A 12U682 ( page D ) 1410 ROMO.2-2 1st quarter of A 12U690 ( page 2 ) 1410 ROMO.2-6...
Page 261 Maintenance— 2440 Service Table 6-6 (cont) 2110 Page Control Register (PCREG) A12U860 (schematic diagram 1): DIAGO Testing Method: Sets PCREG (bit D7) = 0 and tests for = 0 (stuck at one). Sets PCREG (bit D7) = 1 and tests for = 1 (stuck at zero).
Page 262 Maintenance— 2440 Service Table 6-6 (cont) 2130 BUSTAKE Page Control Register A12U860 (schematic diagram 1), OR-gate A12U332D (schematic diagram 2), and Interrupt Register A12U654: Testing Method: To test for stuck at 1, PCREG U860 is written the pattern xOOxxxxx to clear BUS REQUEST and BUSTAKE bits.
Page 263 Maintenance— 2440 Service Table 6-6 (cont) 2150 Interrupt Latch (COMREG) A12U550 and Display Status Register (SSREG) A12U542 (schematic COMREG diagram 2): Testing Method: A BUSTAKE is executed (previously tested) and the 4Q output of U550 (pin 15) is set LO. SSREG U542 bits 0 and 1 (pins 16 and 18) are then tested to see if they are LO, and the test results are set accordingly.
Page 264 Maintenance— 2440 Service Table 6-6 (cont) Check that U550 pin 15 has a LO-to-HI transition after the second clock pulse goes LO-to-HI. If no transition, change U550; if ok, check chip enable of U542 on pin 1 (SSREG) to be LO after W RR on U550 pin 9 goes LO-to-HI.
Page 265 Maintenance— 2440 Service Table 6-6 (cont) Now using CH2 probe: Check that U754 pin 1 RESET is HI. Run test 2170 in CONTINUOUS mode and check the clock line to A12U754 at pin 11 for LO-to-HI transitions. Since this is the register that provides the strobe to W ORD TRIG, there should be four clock pulses, one at each end of the trigger strobe and two under it.
Page 266 2) is set LO during the period that the clock line U550 pin 9 has a LO-to-HI transition. This may be done by saving the COMREG signal in REF1 (if using a 2440 as the test scope) and displaying it while acquiring the clock pulse on U550 pin 9. If these signals are not coincident, then troubleshoot the cause.
Page 267 Maintenance— 2440 Service Table 6-6 (cont) Troubleshooting Procedure: If test = FAIL for all tests, then look for failure using the following steps: Set up the test scope as per Step 1 of the 2110 troubleshooting procedure. Now using the CH 2 probe: Run test 2210 in CONTINUOUS Mode and check U532 pin 1 for MISC to be LO during the time of the trigger strobe.
Page 268 Maintenance— 2440 Service Table 6*6 (cont) 2230 Display Control Register A 11U530 and A 11U531 (schematic diagram 17): DISCON Testing Method: The DISCON (display control) register is tw o components, latch U530 and read-back buffer U 531. The test result is set to PASS, any failure sets it to FAIL.
Page 269 Maintenance— 2440 Service Table 6-6 (cont) 2310 Volts Cursors Register A11U241 (schematic diagram 16) Testing Method: VCURS The Volts Cursors Register test checks two components; latch U241 readback is via Diagnostic Buffer U 141. The test result is set to PASS, any failure sets it to FAIL.
Page 270 Maintenance— 2440 Service Table 6-6 (cont) 2330 Ramp Buffer A11U130 (schematic diagram 16): U130 Testing Method: If run from this level, all four tests are selected in turn, or one may execute any one test by selecting 2331 to 2334.
Page 271 Maintenance— 2440 Service Table 6-6 (cont) LDCOUNT might not be strobing the data into Display Counters U220 and/or U211 (schematic diagram 17). U414A may not be resetting, or U323 pin 3 might be HI due to a failure. Address Multiplexers U221, U212, and U210 may not be operating properly.
Page 272 Maintenance— 2440 Service Table 6-6 (cont) Test 1. 10100101 is loaded and read back via U 243. Test result is set to fail if not a match on bits 0 through 5. Test 2. 01001011 is loaded and read back via U 243. Test result is set to fail if not a match on bits 0 through 5.
Page 273 Maintenance— 2440 Service Table 6-6 (cont) Verify that U323 pin 3 is LO. Verify the outputs of U221, U212, and U210 are stable and correct after the LDCOUNT strobe to the previous bus. 5a. Verify the RO chip enable to U140 pin 1 is HI for about half of the Trigger strobe positive period, and then that it goes LO and stays LO for the remaining time.
Page 274 Maintenance— 2440 Service Table 6-6 (cont) NOTE Q0 through Q3 0, and Q4 through Q11 map to DO to D7. i.e., Q7 = D3. By knowing which test FAILS and the bit pattern, one may easily determine the problem bit(s) (look for the bit column in the failed tests that are the same).
Page 275 Maintenance— 2440 Service Table 6-6 (cont) Troubleshooting Procedure: Set up the test scope as in Step 1 of the 2110 troubleshooting procedure. Using the CH 2 probe: Run test 2360 in CONTINUOUS mode and check U322 pin 19 for a negative strobe YSEL at from the LO-to-HI transition of the trigger pulse.
Page 276 Maintenance— 2440 Service Table 6-6 (cont) Using the CH 2 probe: Run test 2370 in CO NTINUOUS mode and check U314 pin 19 for a negative strobe XSEL at from the LO-to-HI transition of the trigger pulse. If not present, troubleshoot U323 and the inputs to it.
Page 277 Maintenance— 2440 Service Table 6-6 (cont) Position CH 2 down to allow room to display the signal and probe U641 pin 11 through 18. While the REF1 signal TBSEL is LO and REF2 signal RD is HI, compare the results to 01100101 where U641 pin 11 is D7 and U641 pin 18 is DO.
Page 278 Maintenance— 2440 Service Table 6-6 (cont) 2510 INIT Acquisition Control Shift Registers A10U270 (G ate Array), A101)530 (Peak Detector), A 10U 140 (Trig SHIFT REGS Control), DAC Input Shift Register A 10U850/U851 (schematic diagram 5), and Attenuator Shift Regis ter A10U221/U511 (schematic diagram 9): Testing Method: For this test to pass, the MSB of the five output registers above must be high.
Page 279 Maintenance— 2440 Service Table 6-6 (cont) Check U221 pins 1 and 2 for activity (ACD line is the data input). If ACD missing, troubleshoot the signal path to and gating on the inputs of DAC Multiplexer Select register U272 (diagram 5).
Page 280 S et up the test scope as in Step 1 of the 2110 troubleshooting procedure. NOTE For the following, set the Trigger Position of the test 2440 to 3/4. if using an analog scope for testing, use the appropriate holdoff and trigger level to view the signals of interest.
Page 281 Maintenance— 2440 Service Table 6-6 (cont) Check U850 pin 13 that the first 8-bits of the 16-bit pattern comes out as the second is shifted into U850 at pins 1 and 2. (A Sec/Div setting of 0.5 ms on the test scope is good for viewing the data pattern, and the latched data on pin 13 is much easier to view than the input data pulses).
Page 282 Maintenance— 2440 Service Table 6-6 (cont) 3000 All RAM tests are non-destructive. The Display RAM is tested first, and, if found good, the contents of SYS-RAM the other RAMs are stored in the Display RAM as they are tested. The contents are returned after the test is complete.
Page 283 Maintenance— 2440 Service Table 6-6 (cont) 3200 RAM A 11U440 (schematic diagram 16): A 11U440 ___________________________________________________________________________________________ Troubleshooting Procedure: If test = FAIL then look for failure and correct using the following steps: Run test 3210 in CONTINUOUS mode. Using the CH 1 probe: Check for activity on the chip select line U440 (CSX.
Page 284 Maintenance— 2440 Service Table 6-6 (cont) 3400 RAM A 11U430 (schematic diagram 16): A11U430 _______________________________________________________________________________________________ Troubleshooting Procedure: If test = FAIL then look for failure and correct using the following steps: Run test 3410 in CO NTINUO US mode. Using CH 1 probe: Check the write enable to U 430 (W RA, pin 8) for activity and trigger on the signal if active.
Page 285 Maintenance— 2440 Service Table 6-6 (cont) Troubleshooting Procedure: If test = FAIL then look for failure and correct, using the following steps: Run test 3610 in the CONTINUOUS mode. Using the CH 1 probe: Check for activity on the chip select line to A12U440 (pin 20), and trigger the scope on the signal if active.
Page 286 Maintenance— 2440 Service Table 6-6 (cont) Using the CH 2 probe: Check for activity on the write enable line pin 27. Check for activity on the output enable line pin 22. Check the data I/O pins (pins 11, 12, 1 1 ,1 5 , 16, 17, 18, 18) for activity.
Page 287 Maintenance— 2440 Service Table 6-6 (cont) Troubleshooting Front-Panel A13U700: Check pin 5 for the 4 MHz clock. Check pin 4 for + 5 V, pin 1 for ground. Check pins 8, 14, 16, 17, 19, 31, and 32 for + 5 V and pins 6, 7, and 20 for ground.
Page 288 Maintenance— 2440 Service Table 6-6 (cont) NOTE Since the Front Panel P is being reset in this test, there is no way to HALT if one chooses a CONTINUOUS loop mode and runs the tests from the front panel. However, to allow access to these features for any possible troubleshooting, looping has not been dis...
Page 289 M ain ten a n ce - 2 4 4 0 Service Table 6-6 2440 Troubleshooting P rocedures (cont) Check for LO at U861 pin 6; replace U861 if pin 6 is HI. Check A12U654 pin 13 for LO. Replace A12U654 if pin 13 is LO and test is failing.
Page 290 Troubleshooting Procedure: Set up the 2440 test scope as in Step 1 of the 2110 troubleshooting procedure. Run test 5200 in CONTINUOUS mode. Using the CH 2 Probe: Check U860 pin 15 for LO-to-HI transition. If not occurring, replace U860.
Page 291 Maintenance— 2440 Service Table 6-6 (cont) 5300 Waveform ROM A12U480 and A12U490 (schematic diagram 2): VERSION-CHK Testing Method: The version number in the header is preset to “?" and is filled in by this test. If the test fails, the “?"...
Page 292 Maintenance— 2440 Service Table 6-6 (cont) W A R N I N G If replacing the lithium battery, avoid personal injury by observing proper methods for han dling and disposal, improper handling may cause fire, explosion, or severe bums. Don’t attempt to recharge and don't crush, disassemble, heat the battery above 212°F (100°C),...
Page 293 Maintenance— 2440 Service Table 6-6 (cont) CCD/CLOCK DRIVERS A10U350 (CH 2) and A10U450 (CH 1) (schematic diagram 10): 7000 Testing Method: These tests, if passed, indicate that the hardware is functional. IF A SELF DIAG OR EXTENDED DIAG TEST FAILS, ONE CANNOT A SSUM E THE HARDWARE IS DEFECTIVE UNLESS THE SAME TEST FAILS A SELF CAL.
Page 294 CCDOD22+ /CCDOD22 CCDOD23+/CCDOD23-, and CDOD24+/CCDOD24-). Input the 2440 calibrator signal to the channel that is not operating properly. If neither is work ing, start with CH 1. (CH 1, side 1 components are referenced: see NOTE above.) Set the bad channel to 100 mV/div, DC coupled, with 50 fl termination off.
Page 295 Maintenance— 2440 Service Table 6-6 (cont) 7300 CCD/CLOCK DRIVERS A10U350 and A10U450 (schematic diagram 10): EFFICIENCY Testing Method: This test measures the transfer efficiency of the CCD by comparing the gain of columns 2 and 16 of the CCD B register arrays. To do this, a ± 4 division input is applied to the Peak Detector calibration inputs and acquired.
Page 296 Maintenance— 2440 Service Table 6-6 (cont) 8000 Preamplifiers A10U320 (CH 2) and A10U420 (CH 1) (schematic diagram 9): Testing Method: The PA tests, if passed, indicate that the analog acquisition circuitry is functional. IF A SELF DIAG OR EXTENDED DIAG TEST FAILS, ONE CANNOT A SSUM E THE HARDWARE IS DEFECTIVE UNLESS THE SAM E TEST FAILS A SELF CAL.
Page 297 Maintenance— 2440 Service Table 6-6 (cont) The check is set up by first doing a COLD START (to again set the calibration constants to known values), and then applying a 4-division signal to the CH 1 and CH 2 vertical inputs (or to the bad channel if only one is bad).
Page 298 Maintenance— 2440 Service Table 6-6 (cont) 8100 Acquisition System Position Offset: POSITION OFFSET Testing Method: Position Offset is calculated at 50 mV per division only. Position offset must be performed for all four acquisition modes to compensate for the common-mode offsets in the CCD arrays that are not corrected by CCD centering.
Page 299 Maintenance— 2440 Service Table 6-6 (cont) Troubleshooting Procedure (refer to test 8000 for more information): Check that the decoupling network, R420/C423 or R222/C222 is functional. Use the FORCE DAC test to determine if the CH1-PA-POS and/or CH2-PA-POS voltages are being controlled by the DAC System. If not, troubleshoot the DAC System.
Page 300 Maintenance— 2440 Service Table 6-6 (cont) Testing Method: 8400 PREAMP GAIN and 8500 During calibration, gain constants are computed by using the Balance control to position + 2 .5 and - 2 . 5 divisions and computing the next gain DAC value until the result is set to be within...
Page 301 Maintenance— 2440 Service Table 6-6 (cont) 8700 Channel 1 and Channel 2 Attenuators AT400 and AT300 (schematic diagram 9): ATTENUATORS Testing Method: THIS TEST IS ONLY PERFORMED USING EXTENDED CALIBRATION. With the Preamplifier set to 50 mV non-inverted, the Preamplifier gain test is repeated interactively using standard dc test voltages applied to the CH 1 and CH 2 inputs.
Page 302 Maintenance— 2440 Service Table 6-6 (cont) If none or only some audible clicks were heard, and assuming the Attenuator Register and Preamplifier tests passed the Power-on SELF TEST or a subsequent EXTENDED DIAGNOSTIC test, troubleshoot the magnetic-latch buffers (U510 and U220) and the latching circuitry (Q620, Q 621, U520, and associated components) on diagram 9.
Page 303 Maintenance— 2440 Service Table 6-6 (cont) c. ACD (Acquisition Control Data), A TRIG CLOCK, and B TRIG CLOCK are the signals that load the internal shift register of U150 with MODE, CPLG, and SLOPE requirements for the trigger signal. These lines should have TTL level voltage swings, and the A TRIG CLOCK clock and B TRIG CLOCK signal lines should only have transitions when the associated A or B Trigger MODE, CPLG, or SLOPE are changed.
Page 304 Maintenance— 2440 Service Table 6-6 (cont) c. The voltage at U100 pins 25 and 36 should be verified to be + 5 V to test for defective decou pling components (L210/C211 and L120/C112). INTERNAL TRIGGER PATH— EXCLUSIVE: CH 1 and CH 2 PREAMPS U420 and U320, U230A, U230B, and associated components...
Page 305 Maintenance— 2440 Service Table 6-6 (cont) C H I and CH2 TRIGGER signals should be at or near 0 V. (LR421/LR220 can be open and not cause a FAIL flag to appear at this diagnostic test level since this test only requires CH1/CH2 trigger signal to be near 0 V, which is the case with these components open.
Page 306 Maintenance— 2440 Service Table 6-6 (cont) 9300 This routine is not a test. Enough samples are acquired to calibrate the Jitter Correction Gain in REPET Extended Calibration. Troubleshooting Procedure: Use the Jitter Correction Troubleshooting procedure to locate the source of the failure.
Page 307 Maintenance— 2440 Service Table 6-6 (cont) In version 1.7 software, an abort will cause the Trigger LEDs to flash, but no coded flashing is done. The abort codes for version 2 software and possible causes of an abort are shown in the following...
Page 308 Maintenance— 2440 Service Table 6-6 (cont) Using the CH 2 probe: Check each address line in order (from AF to AO) for a valid TTL-level signal, with each lower address line having a frequency of exactly twice the frequency as the address above it. Any loss of the 50% duty cycle and/or distortion indicates a shorted address line.
Page 309 Maintenance— 2440 Service Table 6-6 (cont) Check the host memory-mapped I/O selects at the outputs of U830 to verify that selects are gen- erated and only during the time HM M IO is LO. With the power off, check that no two of the select outputs are shorted together. If shorted, troubleshoot the cause and repair.
Page 310 Maintenance— 2440 Service Table 6-6 (cont) | — HMMIO 601 HMMIO 6000-6FFF | - - NVRAM NVRAM 7000-77FF SYSRAM 7800-7FFF ROMO.X R0M1 « 8 0 0 0 - 4- C O O O - H BFFF FFFF 4V ■ -SYSTEM...
Page 311 Maintenance— 2440 Service Table 6-6 (cont) W AVEFORM Waveform mP Kernel Mode: This mode is used when a fault has been found on either the System mP data bus or the System address bus while in the BUS CONNECT mode or when SELF TEST 5100 (RUN TASK) fails in the Extended Diagnostics menu.
Page 312 Maintenance— 2440 Service Table 6-7 Video Option Troubleshooting VIDEO Video Option (schematic diagram 21): OPTION If VIDEO is pressed and an error message of “VIDEO OPTION NOT INSTALLED OR FAULTY” is FAULT displayed, then the power-on SELF TEST has detected a problem (assuming the Video Option is installed).
Page 313 Maintenance— 2440 Service Table 6-7 (cont) VIDEO Auto triggering or unstable trigger in VIDEO CPLG: TRIGGER PROBLEM INITIAL SETUP: Apply a negative-sync, flat-field, video signal to the CH 2 input. Select the correct protocol (System M or Nonsystem M) for the applied signal using the Extended Functions menus.
Page 314 Maintenance— 2440 Service Table 6-7 (cont) SIGNAL See INITIAL SETUP in VIDEO Trigger Problem for control settings and signal application. Set the test PROCESSING scope Sec/Div setting to 5 and the Volts/Div to 2 V. PROBLEM Check U610 pin 5 for a horizontal line sync signal having the negative sync tip at about 0.5 V and a back-porch level of + 4 .5 V.
Page 315 Maintenance— 2440 Service Table 6-7 (cont) INCORRECT See INITIAL SETUP in VIDEO Trigger Problem for control settings and signal application. Set the test LINE scope Sec/Div setting to 5 and the Volts/Div to 2 V. COUNTING Check that the correct protocol and Counter Restart choices are selected for the applied Video signal.
Page 316 Maintenance— 2440 Service Table 6-7 (cont) Did the CH 2 signal display change vertical position by any amount when CLAMP was turned on? If not, check that BPCLAMP is HI with CLAMP ON. Troubleshoot A12U750 (schematic diagram 20) if not correct.
Page 317 Maintenance— 2440 Service Table 6-8 (cont) GPIB SETUP (OUTPUT) MEASURE Controls DEBUG MARK LONG DISPLAY LOCK W INDOW PATH METHOD M IN/MAX RQS Mask LEVEL (units) OPC Mask LEVEL (settings) CER Mask PROXIMAL 10% /0.4 volts EXR Mask MESIAL 50% /1.3 volts...
Page 318 Maintenance— 2440 Service Table 6-8 (cont) VIDEO OPTION Setup (SET TV) WORD RECOGNIZER (SET WORD) Interlaced Coupling FIELD1 Word Match Don’t care Noninterlaced Coupling FIELD1 (all x) TV SYNC - (minus) RADIX CLAMP CLOCK ASYNC Line Count Line Start PREFLD...
Page 319: Section 7 Options And Accessories
161-0104-06 Option A2 (UK) This section contains a general description of available Power cord (2.5 m) 161-0104-07 options for the 2440 Digital Storage Oscilloscope at time of manual publication. The options are: Option A3 (Australian) Power cord (2.5 m) 161-0104-05 Option A4 (North American) Power cord (2.5 m)
Page 320: Standard Accessories
159-0014-00 the Word Recognizer Probe is included in the standard 1 CRT Filter, Blue Plastic (installed) 378-0199-03 2440 Digital Oscilloscope; it is only necessary to purchase 1 C RT Filter, Clear Plastic 378-0208-00 the Word Recognizer Probe optional accessory. Instru...
Page 321: Section 8 Replaceable Electrical Parts
If a part you have ordered has been replaced with a new or blies in numerical sequence (e.g., assembly A1 with its improved part, your local Tektronix, Inc. Field Office or subassemblies and parts, precedes assembly A2 with its representative will contact you concerning any change in subassemblies and parts).
Page 323 KENT WA 98032 0JR04 TOSHIBA AMERICA INC 9775 TOLEDO WAY IRVINE CA 92718 ELECTRONICS COMPONENTS DIV 0J7N9 M CXINC 30608 SAN ANTONIO ST HAYWARD CA 94544 0J9R2 HARISON ELECTRIC CO LTD ASAHIMACHI 5-CHOMEIMABARI EHIME JAPAN 2440 Service REV JUL 1993...
Page 324 CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. Address City, State, Zip Code Manufacturer Code 0MS63 QUALITY TECHNOLOGIES CORP 6 1 0 NMARY AVENUE SUNNYVALE CA 94086 ONOKO CALOGIC CORP 237 WHITNEY PLACE FREMONT CA 94539 00779 AMP INC 2800 FULLING MILL HARRISBURG PA 17105 PO BOX 3608...
Page 325 SUB OF AMP INC PO BOX 543 61857 S A N -0 INDUSTRIAL CORP 85 ORVILLE DR BOHEMIA LONG ISLAND NY PO BOX 511 11716-2501 62786 HITACHI AMERICA LTD 2000 SIERRA POINT PARKWAY BRISBANE CA 94005 HITACHI PLAZA 2440 Service REV JUL 1993...
Page 326 CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Manufacturer Mfr. Address City, State, Zip Code Code 64537 31 FARINELLA DR KDI E LE C T R O N IC S INC EAST HANOVER NJ 07936 SU B S ID IA R Y O F KDI C O R P 65786 3901 N 1ST ST SAN JOSE CA 95134-1506...
Page 327 CIRCUIT BD ASSYHV POWER SPLY 80009 670974800 B010108 CIRCUIT BD ASSYHV POWER SUPPLY 80009 670974801 670-9 748 -01 B010110 6 7 0 -9 7 4 8 -0 2 B010111 CIRCUIT BD ASSYHV POWER SUPPLY 80009 670974802 B010118 REVJUL 1993 2440 Service...
Page 328 Component T e k t r o n i x S e r i a l No. Name & Description M f r . M f r . P a r t No. Number P a r t No. E f f e c t i v e Dscont Code 670-9748-03 B010118...
Page 329 80009 119234206 119-2342-08 B010489 B011594 ATTENUATOR,VAR:1X-100X,CHANNEL 2 80009 119234208 A10AT300 ATTENUATOR,VAR: 1 X-1 00X,CHANNEL 2 80009 A10AT300 119-2342-10 B011595 119234210 (2440 ONLY) ATTENUATOR,VAR:1X-100X,CHANNEL 2 80009 A10AT300 119-2342-08 119234208 (2440M ONLY) 119-2342-05 B010100 B010488 ATTENUATOR,VAR:PROGRAMMABLE 1X-100X 80009 A10AT400 119234205 119-2342-07 B010589 B011594 ATTENUATOR,VAR:1X-100X,CHANNEL 1...
Page 330 Component Tektronix Serial No. Mfr. Mfr. Part No. Name & Description Part No. Number Effective Decent Code A10C211 290-0943-02 CAP,FXD,ELCTLT:47UF,20%,25V 1W344 SME25VB47RM5X11 A10C212 28 1 -0909-00 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222 SA105C223MAA A10C213 290—0943—02 1W344 CAP,FXD,ELCTLT:47UF,20%,25V SME25VB47RM5X11 A10C214 2 81 -0909-00 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222...
Page 331 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222 SAl 05C223MAA 281 -0909-00 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V A10C473 SAl 05C223MAA 04222 A10C474 281 -0909-00 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V 1W344 SME25VB47RM5X11 A10C480 CAP,FXD,ELCTLT:47UF,20%,25V 290-0943-02 04222 SAl 05C223MAA A10C481 2 81 -0909-00 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V SAl 05C223MAA 04222 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V A10C483 281 -0909-00 REV JUL 1993 2440 Service...
Page 332 > > > > > > > > > > > > > > •a. 8 8 8 8 8 8 8 8 8 " ‘ G O G O ro -» • rv > -*• § § § ro ro io ro c n oi oi -*•...
Page 333 > > > > > > > > > > > > > § § § § § 05 K 5 "• 3 IO -k 7 ® ! a c o < a • 8 ‘ s s $ £ >...
Page 334 2 8 1 -0 9 0 9 -0 0 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222 A10C747 2 8 5 -1 3 0 1 -0 1 CAP,FXD,MTLZD:0.47UF,10%,50V TK1913 MKS 2 .47/50 A10C748 TK1913 28 5 -1 3 0 1 -0 1 CAP,FXD,MTLZD:0.47UF, 10%,50V MKS 2 .47/50 2440 Service REV JUL 1993 8 -13...
Page 335 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A10C751 281 -0 8 1 4 -0 0 CAP,FXD,CERAMIC :MLC; 100 PF. 10%. 100V TK1743 CGB101KEN 2 8 5 -1 3 0 1 -0 1 A10C752 CAP,FXD,MTLZD:0.47UF, 10%.50V...
Page 336 DIODE,SIG:,ULTRA FAST;40V,150MA,4NS,2PF 27014 FDH9427 A10CR491 1 5 2 -0 1 4 1 -0 2 DIODE,SIG:,ULTRA FAST;40V,150MA,4NS,2PF 27014 FDH9427 A10CR500 27014 A10CR501 1 5 2 -0 1 4 1 -0 2 DIODE.SIG: .ULTRA FAST;40V,150MA.4NS.2PF FDH9427 8-15 REV JUL 1993 2440 Service...
Page 337 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Code Number Part No. Effective Dscont A10CR502 152-0141 - 0 2 DIODE,SIG:,ULTRA FAST;40V,150MA,4NS,2PF 27014 FDH9427 27014 FDH9427 A10CR503 1 5 2 -0 1 4 1 -0 2 DIODE.SIG:,ULTRA FAST;40V,150MA.4NS.2PF...
Page 338 1 0 8 -0 5 3 8 -0 0 A10L340 1 0 8 -0 5 3 8 -0 0 COIL.RRFIXED.2.7UH 0JR03 1 1 4 -0 2 6 6 -0 0 A10L431 1 1 4 -0 2 6 6 -0 0 COIL,RF:VARIABLE,370-575NH,FORM 8-17 REV JUL 1993 2440 Service...
Page 339 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Code Number Part No. Effective Decont A10L460 1 0 8-1 309 -00 COIL,RF:FXD,70NH,15% 0JR03 1 0 8 -1 3 0 9 -0 0 A10L480 0JR03 1 0 8-0 538 -00 COIL,RF:FIXED,2.7UH...
Page 340 1 5 1 -0 2 2 3 -0 0 TRANSISTOR,SIG:BIPOLAR,NPN;15V.500MA 04713 MPS2369A MPS6523RLRP A10Q774 1 5 1 -0 2 1 6 -0 4 04713 TRANSISTOR,SIG:BIPOLAR,PNP;25V,1 OOMA A10Q775 1 5 1 -0 2 1 6 -0 4 TRANSISTOR,SIG;BIPOLAR,PNP;25V,100MA 04713 MPS6523RLRP 8-19 2440 Service REV JUL 1993...
Page 341 Component Tektronix Mfr. Mfr. Part No. Serial No. Name & Description Number Code Part No. Effective Dscont A10Q780 04713 MPS2369A 1 5 1 -0 2 2 3 -0 0 TRANSISTOR,SIG:BIPOLAR,NPN;15V,500MA A10Q781 1 5 1 -0 2 1 6 -0 4 TRANSISTOR,SIG:BIPOLAR,PNP;25V,100MA...
Page 342 A10R240 3 2 1 -0 1 3 9 -0 0 RES,FXD,FILM:274 OHM,1%,0.125W,TC=T0 MR25 2 3 2 2 -1 5 1 -2 TK1727 A10R241 321 -0201 - 0 0 RES,FXD,FILM:1.21K OHM,1%,0.125W,TC=T0 MR252322—151 - I K TK1727 REVJUL 1993 2440 Service 8-21...
Page 343 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A10R242 3 1 5 -0 7 5 0 -0 0 RES,FXD,FILM:75 OHM,5%,0.25W TK1727 SFR25 2322-181 A10R243 3 1 5 -0 7 5 0 -0 0 RES,FXD,FILM:75 OHM,5%,0.25W...
Page 344 RES,FXD:METAL FILM;100K OHM,1%,0.2W (2440M) 321 -0 3 8 5 -0 0 19701 5043ED100K0F A10R379 B010100 B010185 RES,FXD,FILM:100KOHM.1%,0.125W,TC=T0 A10R379 3 2 2 -3 3 8 5 -0 0 B010186 91637 CCF501G10002F RES,FXD:METAL FILM;100K OHM,1%,0.2W (STANDARD) 8-23 2440 Service REV JUL 1993...
Page 345 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Effective Dscont Number Part No. Code B010186 A10R379 3 2 2 -3 3 8 5 -0 0 RES,FXD:METAL FILM;100K OHM,1%,0.2W 91637 CCF501G10002F (2440M) A10R380 3 1 5 -0 1 2 2 -0 0 RES,FXD,FILM:1.2K OHM,5%,0.25W...
Page 346 RES,FXD,FILM:100 OHM,5%,0.25W TK1727 SFR25 2322-181 A10R501 3 1 5 -0 1 0 1 -0 0 RES,FXD,FILM:100 OHM,5%,0.25W TK1727 SFR25 2322-181 A10R502 3 1 5 -0 2 7 2 -0 0 RES,FXD,FILM:2.7K OHM,5%,0.25W REV JUL 1993 8 -2 5 2440 Service...
Page 347 Component Serial No. Mfr. Mfr. Part No. Tektronix Name & Description Number Part No. Effective Dscont Code A10R510 3 1 5 -0 1 0 3 -0 0 RES,FXD,FILM:10K OHM,5%,0.25W TK1727 SFR25 2322-181 A10R512 RES,FXD,HLM:360 OHM,5%,0.5W 19701 5053CX360R0J 3 0 1 -0 3 6 1 -0 0...
Page 348 321 -0 2 8 9 -0 0 5043ED1OKOOF 19701 RES,FXD,FILM:10.0K OHM,1%,0.125W,TC=T0 A10R646 3 1 5 -0 4 7 2 -0 0 SFR25 2322-181 RES,FXD,FILM:4.7K OHM,5%,0.25W TK1727 A10R647 3 1 5 -0 1 5 0 -0 0 SFR25 2322-181 TK1727 RES,FXD,FILM:15 OHM,5%,0.25W 2440 Service 8-27 REVJUL 1993...
Page 349 Component Tektr o n i x S e r i a l No. M f r . M f r . P a rt No. Name & Description Number E f f e c t i v e Dscont Pa r t No. Code A10R648 3 1 5 -0 1 5 3 -0 0...
Page 350 CCF50— 2 — 20000J RES,FXD,FILM:2K OHM,5%,0.2W 91637 A10R784 3 2 2 -3 1 2 6 -0 0 91637 CCF501G200ROF RES,FXD,FILM:200 OHM,1%,0.2W,TC=T0 CCF50— 2-20000J A10R785 3 1 3 -1 2 0 2 -0 0 91637 RES,FXD,FILM:2K OHM,5%,0.2W 8-29 2440 Service REV JUL 1993...
Page 351 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Decent Code A10R786 3 1 3 -1 2 0 2 -0 0 RES,FXD,FILM:2K OHM,5%,0.2W 91637 CCF50— 2 —20000J A10R788 3 1 3 -1 2 0 2 -0 0 RES,FXD,FILM:2K OHM,5%,0.2W...
Page 352 1 3 1 -0 6 0 8 -0 0 TERMINAL,PIN:PRESSFIT/PCB,;MALE,STR 48283-018 22526 A10TP284 131 -0 6 0 8 -0 0 TERMINAL,PIN:PRESSFIT/PCB,;MALE,STR 22526 48283-018 A10TP288 48283-018 1 3 1 -0 6 0 8 -0 0 TERMINAL,PIN:PRESSFIT/PCB,;MALE,STR 22526 8-37 2440 Service REV JUL 1993...
Page 353 Component T e k t ronix S e r i a l No. Name & Description M f r . M f r . Pa r t No. Number P a r t No. E f f e c t i v e Dscont Code A10TP291 1 3 1 -0 6 0 8 -0 0...
Page 354 1 5 2 -0 1 6 6 -0 0 DIODE,ZENER:,;6.2V,5%,0.4W 04713 SZ11738RL A10VR298 1 5 2 -0 2 7 8 -0 0 DIODE,ZENER:,;3V,5%,0.4W 04713 1N4372ARL A10VR390 1 5 2 -0 6 6 2 -0 0 DIODE,ZENER:,:5V,1%,0.4W 04713 SZG195RL 2440 Service 8-3 3 REV JUL 1993...
Page 355 Mfr. Mfr. Part No. Tektronix Name & Description Component Serial No. Code Effective Dscont Number Part No. 04713 SZG195RL DIODE,ZEN ER:,;5V,1%,0.4W A10VR391 1 5 2 -0 6 6 2 -0 0 04713 SZ11738RL DIODE,ZENER:,;6.2V,5%,0.4W A10VR420 152— 0166— 00 SZG195RL 04713 DIODE,ZENER:,;5V,1%,0.4W...
Page 356 281 -0 9 0 9 -0 0 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V SAl 05C223MAA 04222 A11C342 281 -0 9 0 9 -0 0 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V SAl 05C223M AA 04222 A11C350 281 -0 9 0 9 -0 0 CAP,FXD.CERAMIC:MLC;0.022UF,20%,50V SA105C223MAA 04222 REV JUL 1993 2440 Service 8-35...
Page 357 Component Serial No. Tektronix Name & Description Mfr. Mfr. Part No. Number Effective Dscont Part No. Code A11C390 2 8 3 -0 5 9 4 -0 0 CAP,FXD,MICA DhO.001 UF,1 %,100V TK0891 RDM15FA102F03 A11C392 281 -0 9 0 9 -0 0 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V...
Page 358 281 -0 7 7 7 -0 0 CAP, FXD,CERAMIC: MLC; 51 PF,5%, 100V 04222 SA101C102MAA A11C900 281 -0 7 7 0 -0 0 CARFXD.CER DI:1000PF,20%,100V 04222 281-0762 -0 0 04222 SAl 02A270MAA A11C901 CARFXD.CER DI:27PF,20%,100V 8-37 2440 Service REVJUL 1993...
Page 359 Mfr. Mfr. Part No. Component Tektronix Serial No. Name & Description Number Part No. Effective Dscont Code 04222 SA102C271KAA A11C903 281 -0791 - 0 0 CAP.FXD,CERAMIC :MLC ;270PF,10%, 100V SA102C271KAA 281 -0791 - 0 0 04222 A11C907 CAP.FXD,CERAMIC:MLC;270PF,10%,100V A11C912 2 8 5 -1 3 4 3 -0 0...
Page 360 MR25 2 3 2 2 -1 5 1 -1 A11R363 3 2 1 -0 1 9 3 -0 0 RES,FXD,FILM:1 K OHM, 1 %,0.125W.TC=T0 TK1727 A11R364 3 2 1 -0 8 1 6 -0 0 RES,FXD,FILM:5K OHM,1%,0.125W,TC=T0 19701 5033RD5K000F 8-39 REVJUL 1993 2440 Service...
Page 361 Mfr. Serial No. Name & Description Mfr. Part No. Component Tektronix Effective Dscont Code Number Part No. 19701 5033RD5K000F A11R366 3 2 1 -0 8 1 6 -0 0 RES,FXD,FILM:5KOHM,1%,0.125W,TC=T0 TK2073 A11R376 RES,VAR,TRMR:CERMET;5KOHM,20%,0.5W GF06UT2 502 M L 311 -2 2 3 4 -0 0 A11R380 RES,FXD,FILM:10 OHM,1%,0.125W,TC=T0...
Page 362 MR25 2 3 2 2 -1 5 1 -9 RES,FXD,FILM:49.9 OHM,0.1%,0.125W,TC=T0 A11R881 3 2 1 -0 1 4 3 -0 0 RES,FXD,FILM:301 OHM,1%,0.125W,TC=T0 TK1727 MR25 2 3 2 2 -1 5 1 -3 (NOMINAL VALUE) 8-47 2440 Service REV JUL 1993...
Page 363 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A11R881 3 2 1 -0 1 4 9 -0 0 B010284 RES,FXD,FILM:348 OHM,1%,0.125W,TC=T0 TK1727 MR25 2322-151 - 3 A11R881 3 2 1 -0 1 5 2 -0 0 B010284 RES,FXD,FILM:374OHM,1%,0.125W,TC=T0...
Page 364 1 5 6 -0 4 8 0 -0 0 01295 SN74LS08N A11U460 156-1200-01 IC,LINEAR:BIFET,OP-AMP 01295 TL074CN A11U500 1 5 6 -0 3 8 2 -0 0 1C, DIGITAL:LSTTL,GATE;QUAD 2-IN P U T 01295 SN74LSOON REV JUL 1993 2440 Service 8 -4 3...
Page 365 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A11U501 1 5 6-1 909 -00 IC,DIGITAL:FTTL,MUX;QUAD 2 -T O -1 DATA 04713 MC74F157N A11U502 1 5 6-0 982 -03 IC,DIGITAL:LSTTL,FLIP FLOP 01295...
Page 366 CA ASSY,SP:RIBBON,;IDC,50,28 AWG.6.5 L 53387 A11W780 131 -0 5 6 6 -0 0 BUS.CONDUCTORrDUMMY RES.0.094 OD X 0.225L 24546 OMA0207 A11Y611 K1144 AM— 40MHZ 1 1 9 -2 4 3 0 -0 0 OSCILLATOR,RF:CRYSTAL CONTROLLER,40MHZ 01537 8-45 2440 Service REV JUL 1993...
Page 367 Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Component Number Part No. Effective Dscont Code 6 7 0 -9 7 4 6 -1 7 CIRCUIT BD ASSY: PROCESSOR 80009 670974617 (STANDARD ONLY) 6 7 0 -9 7 4 6 -2 5...
Page 368 281 -0 8 1 4 -0 0 TK1743 A12C590 CAP,FXD,ELCTLT:47UF.20%.25V 1W344 2 9 0 -0 9 4 3 -0 2 SME25VB47RM5X11 A12C592 CAP, FXD,CERAMIC: MLC ;0.022UF,20%,50V 04222 2 8 1 -0 9 0 9 -0 0 SAl 05C223MAA REV JUL 1993 2440 Service 8 -4 7...
Page 369 Component Tektronix Serial No. Mfr. Part No. Name & Description Mfr. Number Part No. Effective Dscont Code 281 -0 7 8 8 -0 0 A12C606 CAP.FXD.CERAMIC:MLC;470PF.10%,100V 04222 SA102C471KAA (OPTION 05 ONLY) A12C606 281 -0 8 1 4 -0 0 CGB101KEN CAP,FXD,CERAMIC:MLC;100 PF,10%,100V...
Page 370 DIODE,SIG:,ULTRA FAST;40V,150MA.4NS.2PF (OPTION 05 ONLY) A12CR620 1 5 2 -0 4 6 0 -0 0 DIODE, SIG:, REGLTR;100V,1.20MA IP,1,45V 04713 1N5299 (OPTION 05 ONLY) 152-0141 - 0 2 B010100 B013314 FDH9427 A12CR701 DIODE,SIG:,ULTRA FAST;40V,150MA.4NS.2PF 27014 8-49 REV JUL 1993 2440 Service...
Page 371 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A12CR702 1 5 2 -0 1 4 1 -0 2 B010100 B013314 DIODE,SIG:,ULTRA FAST;40V,150MA.4NS,2PF 27014 FDH9427 27014 FDH9427 A12CR715 152-0141 - 0 2 DIODE,SIG:.ULTRA FAST;40V,150MA.4NS.2PF...
Page 372 91637 CCF50— 2 — 47ROOJ A12R107 3 1 3 -1 4 7 0 -0 0 RES,FXD,FILM:47 OHM,5%,0.2W 91637 CCF50— 2 —10000J A12R108 3 1 3 -1 1 0 2 -0 0 RES,FXD,FILM:1 K OHM,5%,0.2W REV JUL 1993 8-51 2440 Service...
Page 373 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A12R120 3 1 3 -1 1 0 3 -0 0 RES,FXD,FILM:10K OHM,5%,0.2W 91637 CCF50— 2 -1 00 01J A12R122 3 1 3 -1 4 7 0 -0 0...
Page 374 3 1 5 -0 1 0 4 -0 0 A12R412 RES,FXD,FILM:100K OHM,5%,0.25W (OPTION 05 ONLY) SFR25 2322-181 TK1727 A12R413 3 1 5 -0 1 0 4 -0 0 RES,FXD,FILM HOOK OHM,5%,0.25W (OPTION 05 ONLY) 8-53 REV JUL 1993 2440 Service...
Page 375 Mfr. Mfr. Part No. Component Tektronix Serial No. Name & Description Number Part No. Effective Dscont Code SFR25 2322-181 A12R414 31 5-0 103—00 RES,FXD,FILM: 10K OHM,5%,0.25W TK1727 (OPTION 05 ONLY) SFR25 2322-181 A12R415 315— 0273— 00 RES,FXD,FILM:27K OHM,5%,0.25W TK1727 (OPTION 05 ONLY)
Page 376 91637 CCF50— 2 —10000J A12R648 3 1 3 -1 1 0 2 -0 0 RES,FXD,FILM:1K OHM,5%,0.2W 91637 CCF50— 2 —10000J A12R700 321 -0251 - 0 0 RES,FXD,FILM:4.02K OHM,1%,0.125W,TC=T0 19701 5043ED4K020F (OPTION 05 ONLY) REVJUL 1993 2440 Service 8 -5 5...
Page 377 Serial No. Name & Description Component Tektronix Mfr. Mfr. Part No. Number Effective Dscont Part No. Code •• A12R701 3 1 3 -1 1 0 2 -0 0 B010100 B013314 RES,FXD,FILM:1K OHM,5%,0.2W 91637 CCF50— 2-10000J A12R711 3 1 5 -0 4 7 5 -0 0 RES,FXD,RLM:4.7M OHM,5%,0.25W...
Page 378 1 5 6 -0 3 2 3 -0 0 IC,DIGITAL:STTL,GATES;HEX INV LM555CN A12U274 1 5 6 -0 4 0 2 -0 0 1C,MISC:BIPOLAR,TIMER 27014 04713 MC74F11N 1 5 6 -1 6 6 3 -0 0 1C,DIGITAL:FTTL,GATE;TRIPLE 3-INPU T A12U276 8 -5 7 REV JUL 1993 2440 Service...
Page 379 Component Tektronix Serial No. Mfr. Part No. Name & Description Mfr. Number Part No. Effective Dscont Code MC14025BCP A12U308 1 5 6 -0 5 7 5 -0 0 IC,DIGITAL:CMOS,GATE;TRIPLE 3-IN PU T 04713 (OPTION 05 ONLY) A12U310 1 5 6 -0 3 6 6 -0 0...
Page 380 80009 160494105 A12U670 160-4941 - 0 6 B011873 B012859 MICROCKT,DGTL:16384 X 8 EPROM PRGM 80009 160494106 A12U670 1 6 0 -4 9 4 1 -0 7 B012860 MICROCKT.DGTL:16384 X 8 EPROM.PRGM 80009 160494107 (STANDARD) 8-59 2440 Service REV JUL 1993...
Page 381 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A12U670 1 6 0 -4 9 4 1 -0 3 MICROCKT.DGTL:16384 X 8 EPROM.PRGM 160494103 80009 (2440M) A12U680 1 6 0 -4 9 4 2 -0 0...
Page 382 1 5 6 -0 8 6 5 -0 0 1C,DIGITAL:LSTTL.FLIP FLOP;OCTAL D-TYPE 01295 SN74LS240N A12U830 1 5 6 -0 9 1 4 -0 0 IC,DIGITAL:LSTTL,BUFFER/DRIVER;OCTAL INV 04713 MC74F32N A12U840 1 5 6 -1 7 2 4 -0 0 IC,DIGITAL:FTTL,GATES;QUAD 2-IN PU T 8-61 REV JUL 1993 2440 Service...
Page 383 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A12U844 156-1216-01 1C,DIGITAL: STTL.GATES 01295 SN74S37N 1 5 6 -0 9 8 5 -0 0 A12U850 IC,DIGITAL:LSTTL,GATES;DUAL 5-INPUT 04713 SN74LS260N 1 5 6 -0 9 5 6 -0 0 A12U854 IC,DIGITAL:LSTTL,BUFFER/DRIVER;OCTAL NONINV...
Page 384 281 -0 8 1 4 -0 0 TK1743 CGB101KEN CAP.FXD,CERAMIC:MLC;100 PF,10%,100V A13C884 2 8 1 -0 9 0 9 -0 0 04222 SAl 05C223MAA CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V A13C885 281 -0 7 7 5 -0 0 04222 SA105E104MAA CAP.FXD.CER DI:0.1UF,20%,50V 2440 Service REV JUL 1993 8-63...
Page 385 Serial No. Mfr. Mfr. Part No. Component Tektronix Name & Description Code Effective Dscont Number Part No. A13CR761 1 5 2-0 141 -02 27014 FDH9427 DIODE,SIG:,ULTRA FAST;40V,150MA.4NS.2PF A13CR771 FDH9427 15 2-0 1 4 1 -0 2 DIODE,SIG: .ULTRA FAST;40V,150MA.4NS.2PF 27014...
Page 386 19701 A13R883 321 -0 2 4 5 -0 0 RES.FXD,FILM:3.48K OHM,1%.0.125W,TC=T0 19701 5033ED3K48F C C F 5 0 -2 -10000J A13R884 3 1 3 -1 1 0 2 -0 0 RES,FXD.FILM:1K OHM,5%,0.2W 91637 8 -6 5 REVJUL 1993 2440 Service...
Page 387 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A13R885 3 1 3 -1 1 0 1 -0 0 RES,FXD,FILM:100 OHM,5%,0.2W 91637 C C F50-2 - 1 0OROJ A13R886 3 1 3 -1 1 8 3 -0 0 RES,FXD,FILM:18K OHM,5%,0.2W...
Page 388 CA ASSYSP:RIBBON.;IDC.40.28 AWG.3.5 L A13W122 1 7 5 -9 0 2 4 -0 0 53387 ORDER BY DESC BUS,CONDUCT OR: DUMMY RES,0.094 OD X 0.225L 131 -0 5 6 6 -0 0 A13W800 24546 OMA0207 REVJUL 1993 2440 Service 8 -6 7...
Page 389 Component T e k t r o n i x S e r i a l No. Name & Description M f r . M f r . P a rt No. Number Pa r t No. E f f e c t i v e Dscont Code 6 1 4 -0 7 5 2 -0 0 FRONT PNL ASSY:STANDARD...
Page 390 RES.FXD.RLM: 10K OHM,5%,0.2W CCF50— 2 —10001J 91637 A14R935 3 1 3 -1 1 0 3 -0 0 RES,FXD,FILM:10K OHM,5%,0.2W 91637 CCF50— 2 —10001J A14R936 3 1 3 -1 1 0 3 -0 0 RES,FXD,FILM:10K OHM,5%,0.2W 8-69 2440 Service REV JUL 1993...
Page 391 Tektronix Name & Description Mfr. Component Serial No. Mfr. Part No. Number Code Part No. Effective Dscont RES.FXD.FILM: 100 OHM,5%.0.2W A14R937 91637 C C F 5 0 -2 - 1 00R0J 313-1101 - 0 0 A14S901 SW-VAR RES ASSY2430 80009...
Page 392 IC.DIGITALLSTTL.DEMUX/DECODER A14U903 1C,DIGITAL-.CMOS,SHIFT REGISTER;8-BiT PtSO 27014 MM74C165N A14U904 1 5 6 -0 6 2 5 -0 0 53387 ORDER BY DESC A14W151 1 7 5 -9 0 2 2 -0 0 CA ASSYSP,ELEC:26,28 AWG,18.95 L REVJUL 1993 8-71 2440 Service...
Page 393 Mfr. Part No. Serial No. Name & Description Mfr. Component Tektronix Code Part No. Effective Dscont Number FLEX CKT ASSY:GPIB,POLYMIDE 80009 175927001 175-9270-01 50434 QLMP-1487 LT EMITTING DIO:YELLOW A15DS920 1 5 0 -1 1 6 1 -0 0 QLM P-1487...
Page 394 2 8 3 -0 6 6 5 -0 0 B010100 B010107 CAP,FXD,MICA DI:190PF,1%,100V TK0891 RDM15FD191F03 (2440M ONLY) A16C368 281 -0 7 7 5 -0 0 CARFXD.CER DI:0.1UF,20%,50V 04222 SA105E104MAA A16C384 281 -0 8 1 2 -0 0 CAP,FXD.CERAMIC:MLC;1000PF.10%,100V 04222 SA101C102KAA REV JUL 1993 2440 Service 8 -7 3...
Page 395 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code 2 8 5 -1 3 8 3 -0 0 CAP,FXD,PLASTIC:0.1UF,10%,100V 84411 TEK291 .1 1010 A16C405 C AP.FXD.ELCTLT:1200UF,+100 -10% ,6.3V 2 9 0 -0 8 7 7 -0 0...
Page 396 1 5 2 -0 4 0 0 -0 0 DIODE.RECT: .FAST RCVRY;400V,1 A.200NS MB2501 A16CR631 14552 A16CR650 1 5 2 -0 3 9 8 -0 0 B010100 B013269 DIODE.RECT:,FAST RCVRY;200V,1 A.200NS 14936 1N4935GP REV JUL 1993 2440 Service 8 -7 5...
Page 397 Mfr. Part No. Serial No. Name & Description Mfr. Component Tektronix Effective Dscont Code Number Part No. B013270 SEMICOND DVC,DI:RECTIFIER,SI,150V,1A,35NS 04713 MUR115RL A16CR650 152-0601 -0 1 (STANDARD ONLY) B010100 DIODE,RECT:,FAST RCVRY;200V,1A,200NS 1N4935GP A16CR650 1 5 2 -0 3 9 8 -0 0...
Page 398 1 5 1 -1 1 9 5 -0 0 B010111 (2440M) 1 5 1 -0 1 0 3 -0 0 TRANSISTOR,SIG:BIPOLAR,NPN;40V,800MA 04713 2N2219A A16Q465 1 5 1 -0 7 9 7 -0 0 TRANSISTOR,PWR:BIPOLAR,NPN;50V,12A S4091 2SD1062 Q OR R A16Q479 REVJUL 1993 8 -7 7 2440 Service...
Page 399 Mfr. Mfr. Part No. Serial No. Name & Description Component Tektronix Code Number Effective Dscont Part No. 04713 MTP5N40E TRANSISTOR, PWR:MOS,N-CH;400V,5.5A.1.0 OHM A16Q521 15 1-1 1 4 1 -0 0 TRANSISTOR,SIG:BIPOLAR.PNP;60V,600MA 04713 2N2905A A16Q665 15 1-0 1 3 4 -0 0...
Page 400 RES.FXD.FILM: 10 OHM.5%,0.25W A16R578 TK1727 SFR25 2322-182 A16R624 3 2 1 -0 1 1 4 -0 0 B010100 B012656 RES.FXD.FILM: 150 OHM.1 %.0.125 W,TC=T0 MR25 2 3 2 2 -1 5 1 -1 TK1727 REV JUL 1993 8 -7 9 2440 Service...
Page 401 Mfr. Part No. Mfr. Component Tektronix Serial No. Name & Description Code Number Part No. Effective Dscont SFR25 2322-181 RES,FXD,FILM:75 OHM,5%,0.25W TK1727 A16R624 3 1 5 -0 7 5 0 -0 0 B012657 (STANDARD ONLY) MR25 2 3 2 2 -1 5 1 -1 B010110 RES.FXD.FILM: 150 OHM.1 %,0.125 W,TC=T0...
Page 402 1 5 6 -0 8 5 3 -0 0 01295 LM393P A161)395 1 5 6 -1 2 2 5 -0 0 IC,LINEAR:BIPOLAR,COMPARATOR;DUAL 01295 LM358P 1 5 6 -0 8 5 3 -0 0 IC,UNEAR:BIPOLAR,OP-AMP;DUAL A16U470 8-81 REV JUL 1993 2440 Service...
Page 403 Mfr. Mfr. Part No. Component Tektronix Serial No. Name & Description Code Number Part No. Effective Dscont IC,UNEAR:BIPOLAR,OP-AMP;DUAL 01295 LM358P A16U570 1 5 6 -0 8 5 3 -0 0 A16U579 1C,UNEAR:BIPOLAR,VOLTAGE REGULATOR 04713 LM317T 1 5 6 -1 1 6 1 -0 0...
Page 404 2 9 0 -1 1 4 4 -0 0 B010108 CAP.FXD, ALUM: ;4.7UF,20%, 100V (2440M ONLY) SA105C223MAA 04222 A17C222 281 -0 9 0 9 -0 0 CAP.FXD.CERAMIC :MLC;0.022UF,20%,50V 04222 SA102A270MAA A17C234 281 -0 7 6 2 -0 0 CARFXD.CER DI:27PF,20%,100V 8 -8 3 2440 Service REV JUL 1993...
Page 405 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A17C239 281 -0 9 0 9 -0 0 CAP,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222 SA105C223MAA A17C260 2 8 3 -0 1 6 7 -0 2 CAP.FXD.CER DI:0.1UF,10%,100V...
Page 406 1 5 1 -0 1 9 2 -0 5 (2440M ONLY) TRANSISTOR, SIG:BIPOLAR,PNP;300V,500MA 04713 MPSA92 A17Q269 1 5 1 -0 4 4 3 -0 0 04713 TRANSISTOR,SIG:BIPOLAR,PNP;300V,500MA MPSA92 A17Q500 1 5 1 -0 4 4 3 -0 0 8 -8 5 REV JUL 1993 2440 Service...
Page 407 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A17Q628 151 -0 8 1 6 -0 0 0JR04 2SA1264N-R TRANSISTOR,PWR:BIPOLAR,PNP; 120V.8.0A.20MH2 A17Q640 151 -0 4 4 4 -0 0 TRANSISTOR.SIG:BIPOLAR.NPN;350V.500MA 04713 2N6517...
Page 408 RES,FXD,FILM:357KOHM,1%,0.2W,TC=T0 91637 5043ED357K0F B012403 A17R245 321 -0 4 3 8 -0 0 RES,FXD,FILM:357K OHM,1%,0.125W,TC=T0 19701 (STANDARD ONLY) CCF501G35702F A17R245 3 2 2 -3 4 3 8 -0 0 B010100 B010107 RES,FXD,FILM:357K OHM,1%,0.2W,TC=T0 91637 2440 Service REVJUL 1993 8 -8 7...
Page 409 Component Tektronix Serial No. Name & Description Mfr. Mfr. Part No. Number Part No. Effective Dscont Code A17R245 3 2 1 -0 4 3 8 -0 0 B010108 RES,FXD,FILM :357K OHM, 1 %,0.125W.TC =T0 19701 5043ED357K0F (2440M ONLY) A17R246 321 -0 4 4 7 -0 0 RES,FXD,FILM:442K OHM.1%,0.125W.TC=T0...
Page 410 CCF501G10002F 3 2 2 -3 3 8 5 -0 0 RES.FXD: METAL FILM;100K OHM,1%,0.2W (STANDARD ONLY) A17R639 3 2 2 -3 3 8 5 -0 0 B010108 RES,FXD:METAL FILM;100K OHM,1%,0.2W 91637 CCF501G10002F (2440M ONLY) 8-89 2440 Service REV JUL 1993...
Page 411 Mfr. Mfr. Part No. Component Tektronix Serial No. Name & Description Number Part No. Effective Dscont Code CCF501G10002F A17R641 3 2 2 -3 3 8 5 -0 0 B012403 RES,FXD:METAL RLM;100K OHM,1%,0.2W 91637 (STANDARD ONLY) CCF501G10002F A17R641 B010108 91637 3 2 2 -3 3 8 5 -0 0 RES,FXD:METAL FILM;100K OHM,1%,0.2W...
Page 412 1 5 2 -0 2 8 5 -0 0 (2440M ONLY) 04713 SZ13203 DIODE,ZENER:,;15V,5%,0.4W A17VR316 1 5 2 -0 2 4 3 -0 0 0J7N9 ORDER BY DESC CA ASSY,SP:RIBBON,;CPR,7,26 AWG.2.75 L A17W175 175-9231 -01 8-91 REV JUL 1993 2440 Service...
Page 413 Mfr. Part No. Mfr. Component Tektronix Serial No. Name & Description Code Effective Dscont Number Part No. 80009 670728000 6 7 0 -7 2 8 0 -0 0 CIRCUIT BD ASSY:SCALE ILLUM OL7153AS15TPL A18DS100 150-0057-01 LAMP,INCAND:5V,0.115A.WIRE LD.AGED & SEL S3774...
Page 414 1 5 6 -3 2 9 3 -0 0 01295 NE5532P IC,UNEAR:BIPOLAR,OP— AMP;DUAL,HIGH OUTPUT A30U118 15 6 -1 2 7 2 -0 0 24355 MAT04-006P A30U125 1C,LINEAR:BIPOLAR,TRANSISTOR ARRAY 1 5 6 -3 2 9 3 -0 0 8-93 REV JUL 1993 2440 Service...
Page 415 Component Serial No. Mfr. Mfr. Part No. Tektronix Name & Description Code Number Part No. Effective Dscont 80009 671036700 671 -0 3 6 7 -0 0 CIRCUIT BD ASSY:CCD OUT TK1743 CGB510GEN A31C114 281 -0 7 9 8 -0 0 CARFXD.CER DI:51PF,1%,100V...
Page 416 1 5 6 -3 2 9 3 -0 0 IC,LINEAR:BIPOLAR,TRANSISTOR ARRAY 01295 NE5532P A32U118 1 5 6 -1 2 7 2 -0 0 IC,LINEAR:BIPOLAR,OP-AMP MAT04-006P 24355 A32U125 1 5 6 -3 2 9 3 -0 0 IC.LINEAR:BIPOLAR,TRANSISTOR ARRAY 8-95 REV JUL 1993 2440 Service...
Page 417 Component Serial No. Mfr. Mfr. Part No. Tektronix Name & Description Effective Dscont Code Number Part No. 80009 671036700 6 7 1 -0 3 6 7 -0 0 CIRCUIT BD ASSY:CCD OUT TK1743 CGB510GEN A33C114 281 -0 7 9 8 -0 0 CAP.FXD.CER DI:51PF,1%,100V...
Page 418 SI 350 2 6 0 -2 2 0 2 -0 0 61545 CP85-41313 SW.PUSH BUTTON:MOMENTARY,5 BUTTON SI 666 2 6 0 -2 1 7 3 -0 0 80009 154085001 CRT ASSEMBLYiFINISHED V I000 154-0850-01 8 -9 7 REVJUL 1993 2440 Service...
Page 420 Section 9- 2440 S ervice DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS COLOR CODE T Y P IC A L D U A L Symbols Y14.15, 1966 Drafting Practices. Graphic symbols and class designation letters are Y14.2, 1973 Line Conventions and Lettering.
Page 421 identify »ny component Locate the Circuit Board Illustration 2 . D eterm in e the Circuit Num ber 3. Locate th e Com ponent on the S ch em atic Diagram mounted on a circuit board and 'Papuan' U n d e r th e S C H E M L O C A T IO N c o lu m n , re a d th e g rid to locate that component in the...
Page 422 MASK BITS INTRPT JITTER LOGIC CH 2 GAINS TRIG GPIBSEL DAC MUX COUNTERS TRIG STAT SIGNALS D0-D4 STAT TRIG <3> 4 SAMPLE CH 2 CENTERS. LEDS JITTER CORRECTION RAMPS AND HOLD CALIBRATOR RGTR 6603-41 Figure 9-4a. 2440 Block diagram— part 1.
Page 423 2440 Service 6330-27 Figure 9-4b. 2440 Block diagram— part 2.
Page 424 CIRCUIT BOARD INTERCONNECTIONS...
Page 425 Special conditions required of the test oscilloscope are given above the waveform; special condi tions for the 2440 under test are given beneath the waveform. Unless otherwise stated, the test conditions for the first waveform listed pertain to all the waveforms for a given schematic diagram. Normal control settings for the test oscillo...
Page 426 2440 Service O T H E R P A R T S S C H E M C IR C U IT S C H E M S C H E M C IR C U IT S C H E M...
Page 428 2440 Service W A V EFO R M S FOR DIA G R A M 1 6 2 8 5 - 3 2...
Page 430 A 1 2 — P R O C E S S O R B O A R D C O M P O N E N T N U M B E R E X A M P L E CIRCUIT SCHEM CIRCUIT...
Page 431 SY STEM PR O C E SSO R CIRCUIT SCHEM CIRCUIT BOARD CIRCUIT 8CHEM BOARD SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION ASSEMBLY A12 BT600 R941 U73Q 0604 R946 U760 C904 Q806 R846...
Page 432 2440 Service W A V EFO R M S FOR DIAGRAM 2 6 6 0 3 - 4 9 BUS ISOLATED...
Page 434 WAVEFORM PROCESSOR C IR C U IT S C H E M B O A R D C IR C U IT SCHEM B O A R D C IR C U IT 8 C H E M BOARD C IR C U IT S C H E M B O A R D N U M B E R...
Page 435 C702 C 7 5 7 C S » : WI22 0 7 5 8 I T ) I - * 0701 ■ ■ o C 7 0 0 U74I R76I W800 U74Z U75I R 7 8 3 U852 U 8 5 3 £...
Page 436 FRONT PANEL PROCESSOR C IR C U IT S C H E M B O A R D C IR C U IT S C H E M C IR C U IT 3 C H E M B O A R D C IR C U IT S C H E M B O A R D...
Page 437 2440 Service A 14— FRONT PANEL BOARD S9I8 ^ S9I9 £ S92I S i S9I6 5 ® S9I4 ± S932 S933 S9I7 : ' < y > • V, . ' O l . . . • S90I cr> CIRCUIT...
Page 438 F R O N T P A N E L CIRCUIT 8CHEM CIRCUIT 8CHEM BOARD CIRCUIT 8CHEM BOARD CIRCUIT 8CHEM BOARD BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION ASSEMB LY A14 R913 S919 C902 CR938 C903 CR939...
Page 440 2440 Service A 10-- M A IN BOARD (cont) C IR C U IT SC HE M C IR C U IT SC HEM C IR C U IT SC H E M C IR C U IT SC H E M...
Page 441 2440 Service A 1 0 — M A IN B O A R D (c o n t) CIRCUIT SCHEM SCHEM CIRCUIT SCHEM CIRCUIT CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER...
Page 442 ciio cm J 1 I 3 © m oiniM SIS'1 - 614 ^ t o t o t o IOIO — trctrE . ieko C I I 2 § UI 5 0 T^ 2 9 l J i l l e j N cn jco cE tE ta- : - J 1 4 I...
Page 443 SYSTEM DAC & ACQUISITION CONTROL REGISTERS BOARD 1 CIRCUIT 1 SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT 8CHEM BOARD CIRCUIT 1 SCHEM LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION ASSEMBLY A10 C l 72 U272 CR530 R750 C283 CR701...
Page 444 S Y S T E M D A C (C O N T ) & A U X IL IA R Y F R O N T P A N E L C IR C U IT S C H E M BO A R D C IR C U IT S C H E M...
Page 446 2440 Service W A V EFO R M S FOR D IA G R A M 7 NtITOT CHI ; r K I • MVIHi TRIGGER ON FALLING EDGE OF U832 PIN 8 MORE...
Page 447 2440 Service W A V E F O R M S FO R D IA G R A M 7 (c o n ’t) TEST SCOPE TRIGGERED ON U623 PIN 5 f i e : T ^ n r - g g t r ' 2 H .
Page 448 C O M P O N E N T N U M B E R E X A M P L E A l l — TIME BASE/DISPLAY BOARD C o m p o n e n t N u m b e r A23 A2 R1234, C IR C U IT S C H E M...
Page 449 SYSTEM C LO C K S C IR C U IT 8 C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT S C H E M BO A R D C IR C U IT...
Page 450 WAVEFORMS FOR DIAGRAM 8...
Page 451 TIME BASE CONTROLLER & ACQUISITION MEMORY S C H E M B O A R D C IR C U IT 8 C H E M C IR C U IT S C H E M C IR C U IT 8 C H E M B O A R D C IR C U IT...
Page 452 A TTEN UA TO R S & PR EAM PS CIRCUIT SCHEM BOARD CIRCUIT CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION ASSEMBLY A10 C523 LR220 AT300 R425 AT400 C524 LR410...
Page 453 2440 Service W A V EFO R M S FOR D IAG RAM 10 CAL SIGNAL ON CHI INPUT B2ECL IN SHORTPIPE MODE (20M S/DIV) NORMAL ACQUISITION C H I H S*« 2.11 U M E 2 T n T 1 -ri n jl 1^*1 1Tl;*! 1 1 1 1 1 1 ' 1 ■"...
Page 454 PEA K D ETEC TO R S & C C D /C L O C K DR IVERS CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT 8CHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION ASSEMBLY A10...
Page 455 WAVEFORMS FOR DIAGRAM 11...
Page 456 TRIGGERS & PHASE CLOCKS CIRCUIT SCHEM BOARD CIRCUIT 8CHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT 8CHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION ASSEMB LYA10 C150 J157 R250 R571 C160 R252 R572 C161 LI 50 R253 R573 L260...
Page 457 2440 Service W A V EFO R M S FOR D IA G R A M 12 TEST SCOPE TRIGGERED ON START U «E *T A 10 M s e t . u & ! UE*T c h i 2 •< - M i C H 2 s e e .u...
Page 459 JITTER C O R R E C T IO N R A M P S C IR C U IT S C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT S C H E M...
Page 460 2440 Service W A V EFO R M S FOR D IAG RAM 13 TEST SCOPE IN ENVELOPE e x i | * « T C l » T ..• — — — . . i _ INIT FRONT PANEL...
Page 461 TR IG G E R H O LD O FF, JITTER C O U N TE R S & C A LIB R A TO R < 1 3 C IR C U IT S C H E M B O A R D C IR C U IT 8 C H E M C IR C U IT...
Page 462 2 4 40 S ervice W A V EFO R M S FOR D IAG RAM 14 TEST SCOPE A TRIGGERED RISING EDGE OF SO & B TRIGGERED ON RISING EDGE OF TTLB1 C M ' ~l49mV1 «WCT •«•»<»» ■ .
Page 464 C C D O U T P U T < 1 4 . C IR C U IT S C H E M BO A R D C IR C U IT S C H E M BO A R D C IR C U IT S C H E M B O A R D...
Page 465 GAIN C ELL B O A R D C IR C U ITR Y C IR C U IT S C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT SCHEM BO A R D...
Page 466 A /D C O N V E R T E R & A C Q U IS IT IO N L A T C H E S < 1 5 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER...
Page 467 C H A S S I S P131 C H A S S I S WAVEFORMS FOR DIAGRAM 16 > o „ > H a , c /> -< 6 6 0 3 -1 7 DISPLAY S ATTRIBUTES MEMORY <16; 2440...
Page 468 2440 Service W A V E F O R M S F O R D IA G R A M 17 TEST SCOPE TRIGGERED ON 126 6330-46...
Page 469 D ISPLAY C O N T R O L < 1 7 C IR C U IT S C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT 8 C H E M B O A R D...
Page 470 2440 Service W A V EFO R M S FOR DIAGRAM 18 TRIGGERED ON AND DISPLAYING CAL SIGNAL 1 mS/DIV, 200 mV/DIV TRIG POS 1 / 2 , SAVE MODE HF REJ COUPLING MORE...
Page 472 HORIZONTAL VECTOR GENERATOR < s > S t a t i c S e n s i t i v e D e v i c e s Maintenance Section I A 11 PARTIAL TIME BASE DISPLAY BOARDI DISPLAY OUTPUT <18 2440...
Page 473 2440 Service W A V EFO R M S FOR DIAGRAM 19 ▼ ▼ ▼ ▼ TEST SCOPE A DELAY BY EVENTS □KH VR316 IQ ____ , 1 " i3C 638C j O l R500 ^ S)CH CR541 KXOOl R543 |OCH CR644 l t d ■...
Page 474 HIGH VOLTAGE SUPPLY & CRT DIAGRAM 19 CIRCUIT 8CHEM BOARD CIRCUIT 8CHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION CRT CONTROL VOLTAGES A10 MAIN BOARD J105 J105 J106 J141 Partial A10 also shown on diagrams 5 ,6 ,9 ,1 0 ,1 1 ,1 2 , 13, a nd 14.
Page 475 2440 Service W A V EFO R M S FOR DIAGRAM 20 EVENTS SOURCE CH 1 TEST SCOPE IN NORM TRIGGER $:* f * >• CM 2 ! t — CH 1 SIGNAL PRESS GPIB TRANSMIT TO RING BELL TEST SCOPE IN ROLL MODE C H 2 C M 1;...
Page 477 SYSTEM I/O < 2 0 C IR C U IT S C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT...
Page 478 2440 Service W A V EFO R M S FOR D IAG RAM 21 BW LIMIT; 20 MHz ON TEST SCOPE A H M 9- re v? «eR T tv ~ —I - * ' * H ~ r..J_..
Page 479 2 . 4 5 M E M C H i ! • :..i....• + » * ..........C H I i l l 2 » . 2 . 4 8 < f £ * T • J. . . -..6 2 8 5 - 4 6...
Page 480 VIDEO OPTION C IR C U IT S C H E M B O A R D C IR C U IT 8 C H E M B O A R D C IR C U IT S C H E M B O A R D C IR C U IT 8 C H E M...
Page 481 2440 Service Rtt? F269 R405 C262 L256 j-4\ R627 C405 J I02 T4I5 TII7 ■ iirt CR685 CR586 i .41 CR485 0 7 21 g 0 R428 T639 0279 C595 C487 L556 < o R 217 R5I6 W360 R5I8 0460...
Page 482 A 16 — LOW VO LTA G E POW ER SUPPLY BOARD CR463 CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT CR484 SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER C l 05 C873 R217 R640...
Page 483 2440 Service W A R N I N G W A V EFO R M S FOR D IAG RAM 22 PO RTIO NS OF THE PO W ER SUPPLY ARE AT THE A C LINE PO TEN TIAL- USE AN ISOLATION TRANSFO RM ER.
Page 484 2440 Service WAVEFORMS FOR DIAGRAM 22 (cont) EITHER AC LINE OR CONTROL CIRCUIT POWER EITHER AC POWER OR CONTROL CIRCUIT POWER f t 1*M *.84 V UttT E \---- H ,---- H --- "I* ...j ..► ..* ..I ..
Page 485 LO W V O LTA G E PO W ER SUPPLY < 2 2 C IR C U IT S C H E M B O A R D C IR C U IT C IR C U IT S C H E M B O A R D C IR C U IT S C H E M...
Page 486 LOW VOLTAGE REGULATORS CIRCUIT SCHEM BOARO CtRCUfT SCHEM CIRCUIT SCHEM BOARD BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION | NUMBER LOCATION LOCATION ASSEMB LYA16 C l 75 CR865 R368 R873 C l 84 CReee R3BB R674 C l 85...
Page 487 2440 Service POWER SUPPLY OVERCURRENT FAULT IN THE EVENT OF A SHORTED LOAD ON AN UNREGULATED VOLTAGE SUPPLY, THE POWER SUPPLY WILL GO INTO THE “CHIRP” MODE. IT CONTINUALLY STARTS UP AND SHUTS DOWN IN A REPEATED MANNER AS THE OVER-CURRENT SENSE CIRCUIT...
Page 488 CONNECT + OUTPUT OF DC POWER SUPPLY (PS503) TO JUNCTION OF CR245 AND R223i CONNECT - TO ANODE OF CR245 CONNECT A DVM BETWEEN THE + LEAD OF THE PS503 AND THE - LINE REFERENCE WARNING I TURN OFF ALL POWER BEFORE ATTEMPTING TO SOLDER OR REPLACE COMPONENTS OR TO MAKE RESISTANCE MEASUREMENTS.
Page 489 2440 Service CHECK GATE DRIVE WAVEFORMS AT PULSE WIDTH MODULATOR FET CHECK U 2 3 3 - PWM (PU L SE W ID TH MOOULATOR) I C OPERATION GATES BY ATTACHING CHECK T620 ( F O R PIN 15 - SAME VOLTAGE AS Q836 EMITTER.
Page 491 2440 Service U313 PIN 2 STOP 512 U313 PIN 1 U313 PIN 6 U414 PIN 6 DISDN U323 PIN 1 PRESTART 1 1 3 2 3 PIN 2 DISPLAY U415 PIN 5 START DIS U415 PIN 1 STOP DIS U412 PIN 8...
Page 493 Name & Description If a part you have ordered has been replaced with a new or Assembly and/or component improved part, your local Tektronix, Inc. Field Office or Attaching parts for assembly and/or component representative will contact you concerning any change in part number.
Page 495 30608 SA N A N T O N IO ST HAYW ARD C A 9 4 544 0 J9P 9 G E R O M E M FG C O INC PO BO X 737 N E W B E R G OR 97132 2440 Service 10-3 REVJUL 1993...
Page 496 CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Address C i t y , S t a t e , Zip Code M f r . Manufacturer Code TIG AR D OR 9 7 223 OKBOO S C H R A M M P LA S TIC FABR IC A TIO R S 7 8 8 5 S W H U N ZIKER P O R T LA N D OR 9 7 214 8 1 0 S E SH E R M AN...
Page 497 12345 Name & Description Fig. & Mfr. Mfr. Part No. Effective Dscont Part No. Code Index 3 3 4 -7 0 9 3 -0 0 MARKER,IDENT:MARKED 2440 22670 1 -1 ORDER BY DESC 378-0896-01 LENS,LIGHT:CLEAR LED TK1591 ORDER BY DESC 366-1833-01 KNOB:DOVE GRAY,0.25 ID X 0.392 OD X 0.466 H...
Page 498 Fig. & Tektronix Serial No. 12345 Name & Description Mfr. Mfr. Part No. Index Part No. Effective Dscont Code REVJUL 1993 Replaceable Mechanical Parts 10-6...
Page 500 2440 Service CHECK 0SAM1, 0SAM2 AND RESET. (CCD OUTPUT SAMPLE CLOCKS) TROUBLESHOOT U730, U621. U720A, U620B, U623B. U513E. U731. AND ASSOCIATED COMPONENTS TROUBLESHOOT MISSING OR WRONG CLOCKS CHECK MS 1 2 . MS22. MS 1 3 . MS23. MS 1 4 . MS24. MS 1 1 .
Page 502 2440 Service...
Page 504 3 6 6 -1 7 6 7 -0 0 PUSH BUTTON:BLACK,YELLOW INDICATOR 4 0 7 -2 9 0 4 -0 2 BRACKET,EXT SFT:POWER,POLYCARBONATE TK1163 4 0 7 -2 9 0 4 -0 2 -2 8 ATTACHING PARTS 10-7 2440 Service REVJUL 1993...
Page 505 Tektronix Serial No. 12345 Name & Description Mfr. Mfr. Part No. F ig .& Index Part No. Effective Dscont Code SCREW,MACHINE:6-32 X 0.312,FLH,STL ! —29 211-0718-00 0KB01 ORDER BY DESC END ATTACHING PARTS 626-0009-00 SHIELD,CRT ASSY: 0J9P9 ORDER BY DESC...
Page 506 SP AC E R ,C KT B D :0 .2 5 STAN D O FF,P O LY SU LFO N E 8 3 014 H N S T 4 —2 5 0 - 1 10-9 2440 Service REV JUL 1993...
Page 507 Fig. & Tektronix Serial No. Qty 12345 Name &Deecription Mfr. Mfr. Part No. Index Part No. Effective Decont Code 3—1 1 CKTBD ASSY:TIME BASE DSPLY (SEE A11 REPL) ATTACHING PARTS 213-0927-00 SCREW,TPG,TR:6-32 X 0 . 8 7 5 , TYPE TT.PNH.STL...
Page 508 ,SETSCREW;8-32 X 0 . 1 8 8 , STL TK0433 ORDER BY DESC END ATTACHING PARTS .CONN.RF JACK::BNC,;50 OHM,FEMALE,STR (SEE A10J2001, A10J2002 REPL) •TERMINAL,CAL: (SEE A10J2006 REPL) CKT BD ASSY:GAIN CELL (SEE A30.A31 . A 3 2 . A 3 3 ) 10-11 REV JUL 1993 2440 Service...
Page 509 Fig. & Tektronix Serial No. 12345 Name & Description Mfr. Mfr. Part No. Index Part No. Effective Dscont Code REVJUL 1993 10-12 Replaceable Mechanical Parts...
Page 510 SISSVHO...
Page 512 2440 Service...
Page 514 CKT BD ASSY:HIGH VOLTAGE (SEE A17 REPL) FAN .TUBEAXIAL: (SEE B1000 REPL) 1 3 1 -0707-00 CONTACT,ELEC:22—26 AWG.BRS & CU BE 22526 47439-000 204-0805-00 22526 65039-035 CONN BODYPLUG:HOLDE:.MINI PV 129-1044-00 TK0588 ORDER BY DESC SPACER,POST:0.575 L.6-32 INT THRU,STL 10-13 2440 Service REV JUL 1993...
Page 515 CABLE ASSY,PWR,:3.0 X 0.75,6A,240V,2.5M S3109 ORDER BY DESC (OPTION A5 - SWISS) ACCESSORY KIT:TWO PROBES,COMPACT TIP 016-0537-00 POUCH,ACCESSORY6 I N X 9 I N W/ZIPPER ZIP-6X9ID 05006 070-6599-00 MANUAL,TECH: OPERATORS,2440 80009 070659900 070-6600-00 MANUAL,TECH: USERS,2440 80009 070660000 070-6601 -00 MANUAL,TECH:PROGRAMMERS,2440 80009...
Page 516 UPGRADE KIT:DANISH 80009 020170300 020-1703-02 B012860 COMPONENT KIT:DANISH HELP TEXT 80009 020170302 (OPTION 4D ONLY) 020-1704-00 B010100 B012859 1 UPGRADE KIT:ENGLISH 80009 020170400 020-1704-02 B012860 COMPONENT KIT:ENGLISH HELP TEXT 80009 020170402 (2440 - ENGLISH) 10-15 2440 Service REV JUL 1993...
Page 517 10-16 Replaceable Mechanical Parts R E V J U L 1 9 9 3...
Page 518 2440 Service...
Page 520 FIG . 5 ACCESSORIES...
Page 522 M an u al Part N o. First Printing 0 7 0 -6 6 0 3 -0 0 July 1988 Product: 2440 Service Manual. Serial Number B014064 & below R evised July 1993 Manual Insert Status DATE C H A N G E R E F E R E N C E...
Page 524 R871 ( l o c a t i o n 3 D ) , R873 ( l o c a t i o n 3 J ) , R881 ( l o c a t i o n 7 D ) , and R883 ( l o c a t i o n 7 J ) t o 1. 5 K Q. EFFECTIVE SERIAL NUMBERS: 2440 B013321 and above...
Page 525 1 July 1993 C h an g e R eferen c e: C 7/0793 EFFECTIVE SERIAL NUMBERS: 2440 B013315 and above EFFECTIVE SERIAL NUMBERS: 2440M B010119 and above B O A R D C H A N G E S A12 PROCESSOR BOARD The f o l l o w i n g p a r t i a l A12 Processor Board shows t h e changes l i s t e d i n t h e Replaceable P a r t s L i s t Changes.
Page 526 BOARD CHANGES A IO MAIN BOARD On the A10 Main Board, R650 is teepee’d to C652 (location 7H). EFFECTIVE SERIAL NUMBERS: 2440 B012403 and above EFFECTIVE SERIAL NUMBERS: 2440M B010108 and above DIAGRAM CHANGES Replace the A17 HV Power Supply Circuit board layout and reference table with the new layout and table attached.
Page 527 1 July 1993 C h a n g e R eferen c e: C 7/0793 EFFECTIVE SERIAL NUMBERS: 2440 B012403 and above EFFECTIVE SERIAL NUMBERS: 2440M B010108 and above DIAGRAM CHANGES Replace CRS10 on Diagram 22 LV POWER SUPPLY with diodes CR511, CR512, CR513, and CR514 as shown.
Page 528 1 .a.Cabinet Installation Grasp the handle hubs (at right and left sides of the instrument) and pull outward. While holding the hubs outward, carefully lower the cabinet onto the instrument. Align the front edges of the cabinet with the EMI rope gasket (see Fig. 6 -2 a ). varning To obtain maximum EMI susceptibility protection, the front edges of the cabinet must be seated on the EMI rope gasket.

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