Page 1 070-6603-00 Product Group 37 2440 OSCILLOSCOPE SERVICE W A R N I N G THE FOLLOWING SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID PERSONAL INJURY, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING...
Page 2 Copyright © 1988 Tektronix, Inc. Ail rights reserved. Contents of this publication may not be reproduced in any form without the written permission of Tektronix, Inc. Products of Tektronix, Inc. and its subsidiaries are covered by U.S. and foreign patents and/or pending patents.
Page 3: Table Of Contents
2440 Service TABLE OF CONTENTS Page Page LIST OF ILLUSTRATIONS........FRONT PANEL PROCESSOR.... 3-28 LIST OF TABLES............FRONT PANEL CONTROLS....3-30 OPERATORS SAFETY SUMMARY......SYSTEM DAC AND ACQUISITION SERVICING SAFETY SUMMARY......CONTROL REGISTERS....... 3-31 SYSTEM DAC (cont) AND Section 1 SPECIFICATION AUXILIARY FRONT PANEL....
Page 4 MAINTENANCE AIDS......6-12 Diagnostics........ 6-25 . INTERCONNECTIONS......6-12 Diagnostic Operation........6-30 TRANSISTORS AND Diagnostic Procedures..^......6-32 INTEGRATED CIRCUITS....6-12 2440 Troubleshooting Procedures Table___ 6-35 SOLDERING TECHNIQUES....6-14 Video Option Troubleshooting Table..6-99 REMOVAL AND REPLACEMENT Troubleshooting Charts.........Section 9 PROCEDURE........6-15...
Page 5: List Of Illustrations
Dimensional drawing....................... 1-24 2- 1 LINE VOLTAGE SELECTOR, line fuse, and power cord receptacle....:....3- 1 2440 simplified block diagram....................Simplified Memory Map of the 2440..................3-18 System Clock waveforms......................3-37 Simplified Peak Detector block diagram..............-... 3-47 Simplified CCD architecture....................3-49 Trigger Logic Array Control Data Byte......
Page 6 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 A33—Gain Cell Boards.
Page 7: List Of Tables
Minimum Signal Level for EXT1 or EXT2 Triggering............4-21 Relative Susceptibility to Static-Discharge Damage............. External inspection Check List..................... Internal Inspection Check List....................6-6 Power Supply Voltage and Ripple Limits................6-10 6-4. Maintenance Aids........................ 6-13 2440 Troubleshooting Procedures..................6-37 Video Option Troubleshooting..............6-104 INIT PANEL States......................6-108...
Page 8: Operators Safety Summary
2440 Service OPERATORS SAFETY SUMMARY The general safety information in this part o f 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 9: Servicing Safety Summary
2440 Service SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY R efer also to the preceding O perators S afety Summary. Do Not Service Alone Disconnect power before removing protective panels, sol dering, or replacing components. Do not perform internal service or adjustment of this pro...
Page 10 ■)
Page 11: Section 1 Specification
VERTICAL SYSTEM INTRODUCTION The two vertical channels have calibrated deflection The TEKTRONIX 2440 Digital Oscilloscope is a factors from 2 mV to 5 V per division in a 1-2-5 sequence portable, dual-channel instrument with a maximum digitiz- of 14 steps. Use of coded probes having attenuation fac...
Page 12 Specification—2440 Service mode is discussed “Controls, Connectors, delay may be set from 1 to 65,536, with a resolution of one event. The DELTA DELAY feature produces two Indicators" in Section 5 of the Operators manual. independently settable delayed B Traces in DELAY by TIME.
Page 13 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 number of acquisitions from 1 to 256 plus CONT (continu cation of the two channels) to any REF memory or to move a stored reference from one REF memory to ous).
Page 14: 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 15 Specification— 2440 Service Table 1-1 Electrical Characteristics Characteristics Performance Requirements ACQUISITION SYSTEM—CHANNEL 1 AND CHANNEL 2 Resolution 8 bits.8 Displayed vertically with 25 digitization levels (DL)b per division. Dynamic Range8 SEC/DIV 100 or slower -1 2 8 to +127 DL’s.
Page 16 Specification—2440 Service Table 1-1 (cont) Characteristics Performance Requirements ACQUISITION SYSTEM-— CHANNEL , 1 AND CHANNEL 2 (cont) Bandwidth is measured with a leveled, low distortion, 50-Q source, Bandwidth sine-Wave generator, terminated in 50 £ 2 . 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 17 Specification— 2440 Service Table 1-1 (cont) Performance Requirements Characteristics ACQUISITION SYSTEM- -CHANNEL 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®...
Page 18 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements ACQUISITION SYSTEM--CHANNEL 1 AND CHANNEL 2 (cont) Maximum input Voltages y | \ Input Coupling Set to DC, AC, or GND 400 V (dc + peak ac); 800 V p-p ac at 10 kHz or less.8 Common-Mode Rejection Ratio (CMRR);...
Page 19 Specification—2440 Service Table 1-1 (cont) Performance Requirements Characteristics TRIGGERING—A and B Minimum P-P Signal Amplitude for Stable® 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 20 Specification— 2440 Service Table 1-1 (Cont) Characteristics Performance Requirements 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 21 Specification-— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements 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 DC Coupled Within ±...
Page 22 Specification— -2440 Service Table 1-1 (coni) Characteristics Performance Requirements TRIGGERING—A and B (cont) A SEC/D!Va MIN HOa MAX HO? Variable A Trigger Holdoff 500 ns 5-id / i s 10-20 20-40 100-150 50-100 f iS 0.1-0.2 ms 0.2-0.4 ms 1-1,5 ms 0.5-1.0 ms...
Page 23 Specification— 2440 Service Table 1-1 (cont) ) ----------------------------------------- - ------------------------------------- Characteristics Performance Requirements TIME BASE Sample Rate Accuracy Average Over 100 or More Samples ± 0.0015%.3 External Clock Repetition Rate Minimum 1 MHz.3 Maximum 100 MHz.a Events Count 1 to 65,536a Events Maximum Repetition Rate 100 MHz.a...
Page 24 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...
Page 25 Specification— 2440 Service Table 1-1 (cont) Performance Requirements Characteristics NONVOLATILE MEMORY Front-Pane! Setting, Waveform Data, Sequencer, and Greater than 3 years. Calibration Data Retention Time 3.6-volt, 1.6-Amp Hour, Lithium Thionyl Chloride; Manufacturer Battery EAGLE PICHER, Type LTC16P/P, TEK Part Number 146-0062- 00;...
Page 26 Specification— 2440 Service Table 1-1 (cont) Characteristics Performance Requirements SIGNAL OUTPUTS VIBRATOR 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) 1 MO Load 0.4 V ±1% .3...
Page 27 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 Mfi. 10 mV per divison ± 10% into 50 fi. Offset ± 10 mV into 50 when dc balance has been performed within ±5°C of the operating temperature.
Page 28 Specification— 2440 Service Table 1-1 (cont) Performance Requirements Characteristics DISPLAY 80 mm X 100 mm ( 8 x 1 0 divisions).3 Graticule Phosphor P31 .a 16 kV.a Nominal Accelerating Potential ■ Waveform,and Cursor Display, Vertical Resolution, Electrical One part in 1024 (10 bit). Calibrated for 100 points per division.3...
Page 29 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 30 (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 31 Meets MIL-T-28800C; MIL-STD-461B, part 4 (CE-03 and CS-02), part 5 (CS-06 and RS-02), and part 7 (CS-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. Electrostatic Discharge Susceptibility Meets Tektronix Standard 062-2862-00.
Page 32: Dimensional Drawing
479 mm (18.86 in). With Front Cover 550 mm (21.65 in). With Handle Extended Forced air circulation; no air filter. Cooling Tektronix Blue vinyl-clad material on aluminum cabinet. Finish Construction Aluminum-alloy/plastic-composite chassis (spot-molded). Plastic- laminate front panel. Glass-laminate circuit boards. RACKMOUNTING...
Page 33 Specification— 2440 Service Table 1-4 Option O S (TV Trigger) Electrical Characteristics Performance Requirements Characteristics VERTICAL—CHANNEL 1 AND CHANNEL 2 Frequency Response Full Bandwidth Within ±1%. 50 kHz to 5 MHz Within +1%, -2% . Greater than 5 MHz to 10 MHz Within +2%, -3% .
Page 34 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, interfaced or noninterlaced systems. Trigger Modes A Horizontal Mode Ail lines: Field 1, selected line (1 to n).
Page 35 Specification—2440 Service D i m e n s i o n s ar e i n c h e s [ m m ] 4916-39 Figure 1-1. Dimensional drawing. 1-25...
Page 37: Section 2 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 38 Preparation for Use— 2440 Service Table 2-1 Voltage, Fuse, and Power-Cord Data Line Factory Power Cord Voltage Fuse Reference Voltage Installed • Plug Range Holder Category Standards1 1 Configuration Selector Instrument Plug Type (AC) Setting Fuse 5A, 250V ANSI C73.11 U.S.
Page 39: 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 40: Power-Down
MUST be used to access the SELF CAL menu—see Section 6 for more information). If failures persist after Jhe SELF CAL is performedr refer the 2, If the instrument is being shipped to a Tektronix instrument to qualified service personnel. Service Center, enclose the following informa...
Page 41: Section 3 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 42: Simplified Block Diagram Description
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.
Page 43 Theory of Operation— 2440 Service Figure 3-1. Simplified block diagram. 3 -3...
Page 44 Theory of Operation—2440 Service Latches comes from the System Clock circuit and is refer The.rBus Connect circuitry includes logic gating that enced to the Output Clocks to maintain the correct data arbitrates when the Waveform jtiP memory space (RAM) input to the magnitude comparators for making the and addressable devices are under control of the System Envelope min-max comparisons.
Page 45 Theory of Operation—2440 Service Front Panel (diagram 4) and Auxiliary Front Panel System Processor (diagram 1) (diagram 6) The System yP, under program direction, controls all the functions of the scope and coordinates the functions of All the buttons and knobs of the Front Panel and Auxili...
Page 46 Theory of Operation*-2440 Service Registers to. control the setup of the Peak Detectors, the liP 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 47 Probe power connectors are an option for supplying the System Clocks circuitry. A Secondary Clock Generator power requirement of active Tektronix probes. The option state-machine circuit produces three clocking signals to consists of two probe power connectors installed on the the Waveform yP to control the activity of that device.
Page 48: Detailed Block Diagram Description
Theory of 6peration-<-2440 Service frequency switching, arid much more efficient power Low Voltage Regulators (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 49 Theory of Operation—2440 Service 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 50: Acquisition Process And Control
Theory of Operation—2440 Service When the Trigger Logic Array determines that the addi At this point in the sampling process the Time Base tional triggering condition^ are also met, the Time Base Controller is waiting for a triggering gate from the Trigger System to complete the acquisition (see "Acquisition Pro...
Page 51: Analog Data Conditioning And A/D Conversion
Theory of Operation—2440 Service The remainder of the Short-Pipeline save operation is not needed to fill the 1024-point waveform record have similar to a FISO save. The Acquisition Memory Address been clocked out so that only the samples properly posi...
Page 52: Acquisition Processing And Display
Theory of Operation—2440 Service SampIe-and-Hold outputs of both CH I an GH2 are gated continue to control the enabling of the outputs of the acquisition latches as described, but the new data , bytes in turn to the A/D Converter. The: cycle then repeats, until are not continually clocked into the latches.
Page 53 Theory of Operation—2440 Service Data Transfer 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 54 Theory of Operation—2440 Service passed through ail rc integrator that produces vectors The Vector Generators consist of a High-Current between the min-max data points of . the Envelope Mode Difference Amplifier, a SampIe-and-Hold circuit, and a display. Integrator to produce the vectors that connect the sample points in the display/Signals for vectored displays are con...
Page 55: Detailed Circuit Description
Theory of Operation— 2440 Service DETAILED CIRCUIT DESCRIPTION The RD signal is derived from U844A, which NANDs SYSTEM PROCESSOR the HVMA signal with the »P 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 56 Theory of Operation— 2440 Service incrementing address lines in the forced “ KERNEL” ing program with all electrical components in valid (defined) 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 57 Theory of Operation—2440 Service interrupts is present at the same time as the NMI, the fiP 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 58 Theory of Operation— 2440 Service SYSTEM ftp ADDRESS WAVEFORM PROG ADDRESS BUS (HEX) ADDRESS BUS OOOOh SAVE MEMORY MISCELLANEOUS U350 RAM UB64 (32K IN FOUR 8K (16K) BANK-SWITCHED PAGES) lOOOh 2000h DISPLAY MEMORY U431, U440 ..(3K) -- — -...
Page 59 Theory of Operation—2440 Service the output of AND-gate U862B HI. If the System Proces the System Data Bus or the Waveform Processor Data sor is accessing these locations in Waveform Processor bus. If they are originated by the Waveform Processor,...
Page 60 Theory of Operation—2440 Servibe address memory map and shows the blocks assigned for Host Memory-Mapped I/O memory-mapped I/O. Each of the' memory-mapped I/O To permit the System jiP to control the hardware func blocks consists of 16 consecutive addresses from 6000h...
Page 61 Theory of Operation—2430A Service The chip-select circuit for System RAM U664 consists Table 3-2 of Q842, Q960, CR944, and associated components. With Processor Control Register Functions instrument power off, no bias current for Q960 is available, and the transistor is off. Power for maintaining the stored Output Function Output Name contents of the RAM is applied to U664 from the Battery...
Page 62: Waveform Processor System
Theory of Operation—2440 Service Table $-3 « return path). Diode CR802- acts as the current switch and Processor-Miscellaneous Register prevents reverse current through the lithium battery during (PMREG) Output Functions normal power-on operation. Resistor R900 provides reverse-current limiting in the event that CR802 becomes shorted.
Page 63 Theory of Operation— 2440 Service U580B, diagram 1). This tells the Waveform ^P that the Initially, with power-on, WPRESET (Waveform iiP reset) current display cycle has completed and the next update from Processor Controlled Register U860 (diagram 1) will to Display Memory may be started.
Page 64 Theory of Operation— 2440 Service U3.60 will be. HI. The center sight bits of the Waveform pP With the “Bn--select input held HI for all Waveform pP data- bus will,; then be buffered onto: .the WD (waveform accesses by BUSCONNECT, U366 routes DADB to data) bus by U360 and .
Page 65 Theory of Operation—2440 Service U850A LO, its output goes HI and enables the Bus One input to U850A is BUSGRANT. Since BUSGRANT Connect Buffer via U254D. Waveform ^P RAM is HI, BUSGRANT is L0 a few nanoseconds after BUS- GRANT enables. While HI, BUSGRANT holds U850A’s...
Page 66 Theory of Operation—2440 Service bits for any given instruction, the 5-MHz dock applied to System fiP RAM (U664, diagram 1). The circuit ROM address inputs AO through delay line DL580 and determines chip selection during norma) operation associated components delays the...
Page 67 Theory of Operation—2440 Service Table 3-4 Waveform Address Decoding fJ P ADDRESS BITS OUTPUT SIGNAL (Active LO) (Y0 or Y1) SAVE from NAND-gate U580C to enable the SAVE memory. (Y2) DISP—Selects display memory. (Y3) DATT—Selects attribute memory. (Y4) ACQ— Selects acquisition memory.
Page 68: Front Panel Processor
Theory of Operation— 2440 Service AND-gate U580B (diagram 1) where it either masks the is used only for further scratch-pad storage. Interpolation RAM is used for storing interpolation calculation DISDN (display done) interrupt from the System when used it occurs or lets the interrupt pass. Masking the DISDN the MEASURE feature of this scope.
Page 69 Theory of Operation— 2440 Service The System tiP handles the interrupt by reading the main program routine sets up the data direction for the byte from the Front Panel ^P; and then, via the various port lines, sets the AN0-AN3 (analog inputs 0-3) to...
Page 70: Front Panel Controls
Theory of Operation— 2440 Service bytes to be given to the System p,P on its PA0-PA7. (port FRONT PANEL CONTROLS A—bits 0 through 7) outputs. It then asserts WRTOHOST (write to host) HI,, clocking the FP1NT (front-panel interrupt) The Front Panel is the operator's interface for control...
Page 71: System Dac And Acquisition Control Registers
Theory of Operation— 2440 Service The System DAC portion of the circuitry consists of a In addition front-panel push-button 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 72 Theory of Operation—2440 Service DAC I-t6-E CONVERTER. This circuit changes the deviation from the correct +1.25 V level produces a gain- differential output currents from DAC U860 into a single- correction voltage applied to the DAC via R760. Capacitor ended output voltage that is routed to a selected Sample- C662 maintains the correction voltage between Da6 and-Hold circuit via one of the analog multiplexers.
Page 73: 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 DAC Multiplexers for the CH 1 and CH 2-BAL voltage followers. The Jitter DAC Multiplexers U821, U830, and U831 route the Gain circuits (formed by U661A and U661B) produce a...
Page 74 Theory of Operation—2440 Service Selecting an input to pass through multiplexer U811 is current through that transistor by a small amount. The change ■ in current is in the appropriate direction to make done by two active input signals, BRIGHTZ and RO. (The...
Page 75: System Clocks
Theory of Operation—2440 Service OVL levels (used to indicate when an excessive voltage is Secondary Clocks applied to the input connector), or one of the two, 180 The Secondary Clocks circuit further divides the degree out-of-phase wipers on the Intensity control (a 20 MHz clock to produce other system clock rates.
Page 76 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 CHI and CH2 CCD array, the TTL version of the Phase-...
Page 77 Theory of Operation— 2440 Service 2X P C |—--------------- s o o n s ------------------ j T T L C a ----------------------------------------- lOOOnS ----------------------------------------- <-j SYMCC2 "1______________________________________: _ ______________________ 1 1 ___________ = ° "s /u ¥ m riiw L n jirL iiiiJ irm jij^ ^...
Page 78 Theory of Operation— 2440 Service A similar 250 ns cycle occurs for the OS2 LO state, That same 20 MHz 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 79: Time Base Controller And Acquisition Memory
Theory of Operation'—2440 Service modes of the CCD (charge-coupled devices) arrays must MSI 3 + MS11, and MS23+MS21 to drive these Acquisi be controlled by U670; these are the FISO mode (fast-in, tion Latch Switches. (For example, MS12 + MS14 indicates slow-out) and the Short-Pipe mode.
Page 80 Theory of Operation—2440 Service ■The F!SO (fast-in, slow-Out, pin 36), ROLL (pin 2), and B register that are extra. When the analog samples are ENVL (envelope, pin 39) outputs are set indirectly by Sys seriaity moved out of the CCD array for digitization, these...
Page 81 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 fiP and control is given back to the System UP...
Page 82 Theory of Operation—2440 Service Memory Mode Control When the TB2MEM signal goes LO, the counters become “transparent" This connects the Waveform yP address The Memory Mode Control circuit is made up primarily bus to the address inputs of the Acquisition Memory so...
Page 83: Attenuators And Preamplifiers
Theory of Operation—2440 Service on whether FISO or Short-Pipe mode is called for. The 1 M £2 position to prevent damage to the attenuator, and TBTRIG bit used in Short-Pipe mode tells the Waveform the error message “50 £ 2 OVERLOAD" is displayed on the fiP when the Time Base Controller detected Record CRT.
Page 84 Theory of Operation—2440 Service the Attenuator Control Register and strobed into the relay. approximately every 64 ms, holding the Preamplifier in a All coif leads for the remaining relays are set HI, and only dc-ba!aneed condition. the selected relay will be set.
Page 85: Peak Detectors And Ccd/Clock Drivers
Theory of Operation—2440 Service between +PICK (pin 12) and -P IC K (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 86: Simplified Block Diagram
Theory of Operation— 2440 Service supplied externally to the CCD via Q450, Q460, and Q551. 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 87 Theory of Operation— 2440 Service L530 L531 ' V Y y \ 15 16 14 17 PEAK DETECTORS OUTPUT MULTIPLEXORS . R431 b a n d w i d t h FILTERS “ 7515 "M A— > SLOW ' MIN...
Page 88 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 of 50 fis and faster. At SEC/DIV settings of 100 ^s and This “op-amp"...
Page 89: Simplified Ccd Architecture
Theory of Operation—2440 Service 6603-39 Figure 3-5. Simplified CCD architecture. 3-49...
Page 90 Theory of Operation— 2440 Service output source follower amplifiers. The RESET clock 50 Q to view them. Using the standard 10 Mfl probe will discharges the output wells between output sample inter cause the signals to have a displayed rise time of about 30 ns;...
Page 91: Triggers And Phase Clocks
Theory of Operation—2440 Service RESET DRIVER. This driver consisting of Q551 is ident- A/B Trigger Generator ical to the C Clock Driver states. It takes the RESET sig The A/B Trigger Generator circuit, composed of U150 nal input from U731C in the System Clocks circuitry and associated components, provides for selection and (diagram 7).
Page 92 Theory of Operation— 2440 Service and is ready to complete the acquisition. With EPTHO set Depending on the address written to, one of the follow 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 93: Trigger Logic Array Control Data Byte
Theory of Operation—2440 Service CONTROL DATA BYTE J T l R T l ONEVNT A T I ABTRIG DON'T CARE EVDEL SELEVENTS JITTER TRIGGER BITS RECDRD TRIGGER BITS ONE EVENT B IT B TRIGGER B IT SOURCE ONEVNT EVENTS-1 DELAYED IN S T . TRIGGER...
Page 94 Theory of Operation-— 2440 Service The A TRIG 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 95 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 f i S FISO f i S...
Page 96: 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 zeroWolt damp level (ground) on pin 5. When the summing node attempts to go below ground The Jitter Correction Ramps located on .diagram 12 are...
Page 97: Jitter Correction Waveforms
Theory of Operation— 2440 Service RAMP (JTRIGJ SLRMP1 SLRMP2 JIT COR RAMP 1 J I T COR RAMP 2 START1 START2 ST0P1 ST0P2 <917-06 Figure 3-7, Jitter Correction waveforms. 3 -5 7...
Page 98: 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 99 Theory of Operation—2440 Service with the capacitance value, of the integration capacitor, HOREF (holdoff reference) level, the output of ramp com parator U871 will go LO. This resets flip-flop U872A of the determines charge rate (slope) of the holdoff ramp; and thereby, the holdoff time.
Page 100 Theory of Operation—2440 Service LO. This LQ 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 101: Ccd Output
Theory of Operation— 2440 Service CCDO11 signal outputs from U450 pass to the Calibrator 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 102: 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 digitized by the A/D Converter is controlled by the MS11 inverted by U880 to produce the 1.5 V reference voltage (Multiplexer Select-Channel 1—...
Page 103: 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. In non-envelope corresponding with the selected CCD output (CH 1 or...
Page 104 Theory of Operation—2440 Service Data that may be stored in the H o rizo n ta l Display ; RAM Vertical Display RAM includes two 512-point waveforms and I K x 8 o f reado ut Vertical Display R A M...
Page 105 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 106: Display Control
Theory of Operation— 2440 Service memory space (stored in the Horizontal RAM). To display Vertical 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 107 Theory of Operation— 2440 Service The 5 MHz clock signal from the Time Base Controller latched bits are used as enables to other portions of the circuit is buffered and inverted by U413C and is used to display circuitry and control the overall function of the drive the Readout State Machine.
Page 108 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 109 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 110 Theory of Operation—2440 Service D2^~AND gate U233A watches for the 12th character a line (only the center 40 are displayed) arid the next four address (11). LSBs are applied to the Vertical DAC to select 1-of-16 display lines. D3-— EOCH (end of character) goes LO on the last Once this rough positioning is done, the Readout State character dot and Causes the next state to be loaded.
Page 111: Readout State Machine Flow Chart
Theory of Operation—2440 Service READOUT S T A T E - M A C H I N E "STATE" ADDRESS TO U232 AND U330 **"0" WATCH "RO" AT ---- ► 00 OF U230 (DISPLAY READOUT) DELAY 1 CLOCK. (200ns) -----►...
Page 112 Theory of Operation--2440 Service data selector U230 is enabled. The three data bits (01 clock. State 7 disables U230, terminating the test condition. through 03) from U232 define which condition needs to be tested and selects one of the D inputs of U230 to route to U231 via the COUNT/LOAD line.
Page 113: 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 U170 to move in the same direc The Display Output circuits (diagram 18) convert the...
Page 114 Theory of Operation-* 1 — 2440 Service input (pin 2) causes .the output (pin 6) of U28.1 to move in (applied to pin 2 of U281A).This difference voltage is sam pled and stored on Hold Capacitor C260 where it sets a...
Page 115: High Voltage Power
Theory of Operation—2440 Service Spot-Wobble Correction To produce a vector display of a waveform, the System P selects the XI and Y1 inputs of U290. This routes the The Spot-Wobble Correction circuit provides a dynamic outputs from the Vector Generators (previously described) correction of spot-shift on the crt caused by signal Inten...
Page 116 Theory of Operation— 2440 Service If the Cathode Supply voltage level tends too positive, a transformer T525 negative. The negative level is applied to slightly positive voltage will develop across C260. This the base of switching transistor Q628 through the voltage causes, the output of integrator U168A to move transformer winding and forward biases it.
Page 117 Theory of Operation—2440 Service Anode Multiplier the base-drive current to Q145 and provides tracking between the two lenses as the FOCUS control is adjusted The Anode Multiplier circuit (also contained in High- during use of the instrument. Voltage Module CR565) uses voltage multiplication to pro...
Page 118 Theory of Operation-—2440 Service Figure 3-10. DC Restorer. 3-78...
Page 119 Theory of Operation—2440 Service the positive half-cycle (150 V peak) is applied to the on the negative plate is set by the crt cathode voltage junction of CR442, CR644, and R546 via R643 and R543. through resistor E and diode A. Capacitor D is charged to Transistor Q640 and associated components form a volt...
Page 120: System I/O
Theory of Operation—2440 Service The fast-rise and fast-fall transitions of the Z-Axis sig to the AutoStep Sequencer, Word-Trigger interface, an nal are coupled to the crt control grid through capacitor D. audio bell, and the probe-power connectors used to supply This ac-coupled fast-path signal sends the crt electron power to active probes.
Page 121 Theory of Operation— 2440 Service SOURCE ACCEPTOR 4917-12 Figure 3-11. GP1B data flow diagram. 3-81...
Page 122: Gpib Three-Wire Handshake State Diagram
R105 and VR 105 to provide the only device other than the 2440 on the bus. + 3 Volt collector supplies for Q104 and Q107.) Sequencer Output Circuit...
Page 123 Bell current-probe accessories. Contact your Tektronix sales The Bell circuit allows the scope to produce an audio representative for a list of approved probe accessories.
Page 124: Video Option
Theory of Operation—2440 Service cuitry. The-latched setting in the register is held until a 1. Selection of trigger field (Fieidi dr 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 125 Operation—2440 Service Theory of SYNC PICKOFF COMPARATOR. The Sync-Pickoff signal applied, the channel resistance of Q514 is minimum, setting the gain of the AGC Amplifier to maximum. With Comparator, composed of Q504 and Q510, switches when maximum gain and no signal, the feedback loops of the...
Page 126 Theory of Operation— 2440 Service Transconductance Amplifier U504 enabled by turning CLOCK FREE RUN. If non-NTSC standard television 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 127: Video Option Waveforms
Theory of Operation—2440 Service TruimnmMjarmnmrLmiJiJirui^^ HCLK HORIECLK DLY'D HCLK JLJl_Jl_X JU lX lU U TTinj^^ o w p sync VERT SYNC ANO ■EQUALIZATION* (-•-HORIZONTAL SYNC-*)-*— EQUALIZATION- SERRATIONS VERTSYNC U308 ru i_ iL J L _ U308-10 PLL E™** ___ \ ____...
Page 128 Theory of Operation— 2440 Service 3-88...
Page 129 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 130 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 131 Theory of Operation—2440 Service each holdoff interval. The resulting display will be stable Since, by definition, System-M fields begin numbering with respect to horizontal sync pulses but will not be lines three lines before the vertical field-sync occurs, and stable with respect to the vertical sync pulses.
Page 132: 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 133 Theory of Operation— 2440 Service Spark-gap electrodes E609 and E616 are surge voltage age supply for the +12 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 134 Operation— 2440 Service...
Page 135 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 136: Pwm Switching Waveforms
Theory of Operation— 2440 Service Figure 3-16. PWM switching waveforms. 3-96...
Page 137 Theory of Operation—2440 Service that the Q output of U829A is held high long enough for PRIMARY OVER-CURRENT SENSING. The primary current of T639 through R727 produces a voltage signal soft-start capacitor Cl 28 and Control Power Supply that is filtered by R728 and C728 to remove high- capacitor C244 to fully discharge.
Page 138: Low Voltage Regulators
Theory of Operation— 244Q Service signal HI. Through the PWRUP signal circuitry, a HI LINE reference level. In order to maintain a stable supply volt UP signal teds the System #P that ample line voltage is age, the reference voltage must itself be.highly stable. The available for normal instrument operation.
Page 139 Theory of Operation— 2440 Service + 8 V Regulator + 5 V Regulator Regulation of the +5 V supply is provided by a circuit The +8 V Regulator is composed of Q465, Q479, similar to that of the +8 V Regulator. As long as the rela...
Page 140 Theory of Operatidn^-2440 Service Operational amplifier U189A is configured as a com going to the main board and a small series resistor in the parator referenced, to + 10.VR EF . When, adequate power- line (R121 on the Main board) causes the actual output- line input .voltage is available, the LINE UP signal will be...
Page 141: Section 4 Performance Check And Functional Verification Procedure
Section 4—2440 Service PERFORMANCE CHECK AND FUNCTIONAL VERIFICATION PROCEDURE N O T E ■ P e r f o r m t h e S E L F - C A L p r o c e d u r e...
Page 142 Performance Check and Functional Verification Procedure 2440 Service Table 4-1 Test Equipment Required N O T E i t e m n u m b e r s 2 0 a n d 2 2 t h r o u g h 2 4 a r e n e e d e d f o r c h e c k i n g t h e 2 4 4 0 T V O p t i o n 0 5 o n l y .
Page 143 Performance Check and Functional Verification Procedure 2440 Service Table 4-1 (cont) Example of Suitable Minimum Item and Purpose Test Equipment Description Specification Tektronix Part Number Signal termination. Impedance: 50 £ 2 . Connectors: BNC. 12. Termination 011-0049-01. Tektronix Part Number Vertical and triggering 13.
Page 144 Performance Check and Functional Verification Procedure 2440 Service steps {in any order) can be performed as long as ALL the Select TRIGGER MODE to display B TRIG MODE parts of a step are performed in sequence and in menu and set TRIG AFTER ON. Select the A/B TRIG but...
Page 145: Initial Setup
Performance Check and Functional Verification Procedure 2440 Service L E V E L w h e n t h e i n i t i a l s e t u p r e c a l l e d , p r o v i d i n g 3.
Page 146: Vertical System
Performance Check and Functional Verification Procedure 2440 Service VERTICAL SYSTEM N O T E B e f o r e p e r f o r m i n g t h e s t e p s i n...
Page 147 Performance Check and Functional Verification Procedure 2440 Service Increase the Power Supply output level until the CH 1 Select CH 1 COUPLING/INVERT Set: 508 ON!OFF trace rises to the center graticule line (+20 V). Set: A SEC/DIV j. Set 500 ON!OFF to ON.
Page 148 Performance Check and Functional Verification Procedure 2440 Service . Move the probe from the CH 1 input connector to the N O T E CH 2 input connector. p r o p e r l y v e r i f y...
Page 149 Performance Check and Functional Verification Procedure 2440 Service 25. Set the HORIZ MODE to A. 13. Set the ACQUIRE menu back to NORMAL on. 26. Press the A/B TRIG button to set the A Trigger 14. Set the TRIGGER LEVEL control at the most System on.
Page 150 Performance Check and Functional Verification Procedure 2440 Service 38. Set HORIZONTAL MODE to A. 44. Select CH 1 COUPLING/INVERT and set INVERT ONIOFF to ON. 39. Set the CH 1 VOLTS/DIV control to 1 V and the Calibration Generator's output level to 5 V.
Page 151 Performance Check and Functional Verification Procedure 2440 Service 51. Remove the cable from CH 2 OR Y input and 4. Check LF Linearity. connect the 5-V standard amplitude signal to a. Recall the Initial Front-Panel Setup, labeled “FPNL" CH 1 OR X and CH 2 OR Y through a Dual- (see step i in “INITIAL SETUP"...
Page 152 Performance Check and Functional Verification Procedure 2440 Service envelope “fill" when performing parts g and i and use 1.84 CHECK—That the bottom of the waveform is within and 2.16 divisions as limits for those parts. +0.4 —0.7 division center horizontal graticule line.
Page 153 Performance Check and Functional Verification Procedure 2440 Service f. Return the A SEC/DIV to 100 ns and set the CH 1 u. Set VERTICAL BANDWIDTH FULL VOLT/DIV control to the next higher setting. A SEC/DIV to 10 /is. Select VERTICAL MODE and set CH 1 on and CH 2 off.
Page 154 Performance Check and Functional Verification Procedure 2440 Service c. Set the generator output level for a 5-division display (cursor readout will be In DIV instead of V units if CH 1 of the reference signal on CH 1. VARIABLE is used).
Page 155 Performance Check and Functional Verification Procedure 2440 Service Move the cable to CH 2 input and change CH 2 Connect the Calibration Generator's STD AMPLI VOLT/DIV control to 100 mV. TUDE output to the CH 2 OR Y input connector via a 50-S) cable.
Page 156 Performance Check and Functional Verification Procedure 2440 Service CHECK—That the cursor readout indicates 90.00- cedure). Make the following changes to the front-panel 110.00 mV. Set 500 ON!OFF back to ON. setup: Disconnect the 50-J2 cable from the Calibration Select VERTICAL MODE Generator's output and connect it to the output of a Lev...
Page 157 Performance Check and Functional Verification Procedure 2440 Service m. Disconnect the Calibration Generator from CH 1 Use the CHI VERTICAL POSITION control to move the displayed trace up 3 divisions and down 3 divisions to connector. create a 6-division "filied” envelope on screen.
Page 158: Triggering Systems
Performance Check and Functional Verification Procedure 2440 Service TRIGGERING SYSTEMS T h e C H 1 a n d C H 2 T r i g g e r L e v e l R e a d o u t A c c u r a c i e s a r e c h e c k e d i n t h e V e r t i c a l S y s t e m s s u b s e c t i o n .
Page 159 Performance Check and Functional Verification Procedure 2440 Service Table 4-3 Minimum Display Level for CH 1 or CH 2 Triggering (in divisions) Trigger Test TRIGGER COUPLING SEC/DIV System Frequency Setting NOISE REJ HF REJ LF REJ 60 Hz 0.35 0.35 (0.35)b...
Page 160 Performance Check and Functional Verification Procedure 2440 Service Select VERTICAL MODE and set ADD on and s i g n a l p a t h s . H o w e v e r , s o u r c e ' s t r i g g e r CH 2 off.
Page 161 Performance Check and Functional Verification Procedure 2440 Service Table 4-4 Minimum Signal Level for EXT1 or EXT2 Triggering (in millivolts) Trigger Test VOLTS/ SEC/ TRIGGER COUPLING System Fre Setting NOISE REJ HF REJ quency Setting LF REJ 17.5 60 Hz...
Page 162 Performance Check and Functional Verification Procedure 2440 Service Select TRIGGER SOURCE Select TRIGGER SOURCE and push the EXT menu Set: A*B!WORD button. Set the A EXT SOURCE 112 TO 2. Select TRIGGER COUPLING. Press A/B TRIG to display the B TRIG SOURCE menu.
Page 163 Performance Check and Functional Verification Procedure 2440 Service e. Using the TRIGGER LEVEL control, VERIFY that the m. VERIFY—That for Trigger Level settings between display can be triggered on the positive going slope of the approximately 0 mV and —200 mV the display is stably ac waveform for the + (plus) selection of the SLOPE but...
Page 164 Performance Check and Functional Verification Procedure 2440 Service g, Set the A COUPLING menu back to DC on. N O T E T " T h e T r i g g e r P o i n t i n d i c a t o r...
Page 165 Performance Check and Functional Verification Procedure 2440 Service j. Use the HORIZONTAL POSITION control to position m. Press A/B TRIG to select the B Trigger System and the time marker with superimposed Trigger Point Indicator set the HORIZONTAL mode to B. Use the TRIGGER to the extreme left graticule line.
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) Termination (Item 12) Coaxial Cable (Item 10) 10X Probe (Item 16) Precision Coaxial Cable (Item 11) IX Probe (Item 17) 1.
Page 167 Performance Check and Functional Verification Procedure 2440 Service Set the generator's marker period to match the vertical graticule line divisions left acquisition rate set in the last part. center screen. VERIFY—That one marker per horizontal graticule Connect the MARKER OUT signal of a Time Mark line is displayed.
Page 168 Performance Check and Functional Verification Procedure 2440 Service p. Rotate the CURSOR/DELAY control to set the A g. Select TRIGGER SOURCE and push the EXT menu DELAY TIME readout to 500 ^s. button. Set A AND B EXT to EXT1/5.
Page 169: Additional Verifications And Checks
Performance Check and Functional Verification Procedure 2440 Service ADDITIONAL VERIFICATIONS AND CHECKS N O T E i t e m s 2 0 a n a 2 2 t h r o u g h 2 4 a r e o n l y n e e d e d - t o c h e c k i n s t r u m e n t s e q u i p p e d w i t h t h e V i d e o O p t i o n ( O p t i o n 0 5 ) .
Page 170 Performance Check and Functional Verification Procedure 2440 Service a. Recall the Initial Front-Panel Setup, labeled “FPNL" k. Select CURSOR FUNCTION and set 1/TIME on. (see step i in “INITIAL SETUP" at the start of this pro VERIFY—That the cursor readout indicates approximately 500.00 Hz.
Page 171 Performance Check and Functional Verification Procedure 2440 Service Select TRIGGER MODE Select: VERTICAL MODE Set: AUTO Set: Select: CH 1 COUPLING/INVERT Set: 50ft ON I OFF Use the VERTICAL POSITION controls to position the CH 1 trace 2 divisions above graticule center and the CH 2 trace 2 divisions below graticule center.
Page 172 Performance Check and Functional Verification Procedure 2440 Service Push AUTO. VERIFY—That the scope sizes the Set the RES (Resolution) back to LO and the Auto waveform to handle the offset by increasing the VOLT/D1V Setup mode to PULSE. setting. The display amplitude should be about 2.5 divi...
Page 173 Performance Check and Functional Verification Procedure 2440 Service Set CH 2 on in the VERTICAL MODE menu (leave 5. V erify MEASURE SNAPSHOT CH 1 on). Set the CH 2 VOLT/DIV to the same setting as Continuous-U pdate Modes. CH 1.
Page 174 Performance Check and Functional Verification Procedure 2440 Service Adjust the active cursor to the same Ya-cycle as the 2. When you have displayed the letter for the first character of the label, push CURSOR < > to other cursor. VERIFY—That the PK-PK value drops to approximately 0 volts.
Page 175 Performance Check and Functional Verification Procedure 2440 Service The message should now say STEP 3. Position the necting the adapter to the DMM, put the side with the CH 1 trace to the graticule line 1 division below graticule bump marked "GRD" to the LOW or (—) input jack.
Page 176 Performance Check and Functional Verification Procedure 2440 Service a. Recall the Initial Front-Panel Setup, labeled “FPNL" o. Enter 1 in response to the controller’s prompt for the . oscilloscope's address (the controller may or may not (see step i in "INITIAL SETUP" at the start of this pro...
Page 177 Performance Check and Functional Verification Procedure 2440 Service y. Select BEAMFIND. VERIFY—That front panel c. Connect the TRIGGER OUTPUT (rear panel) to the CH 2 input connector via a 50-Q cable and a 50-Q STATUS readout Indicates the control setting changes terminator, sent over the controller In part I have been performed.
Page 178 Performance Check and Functional Verification Procedure 2440 Service Select CHI COUPLING/INVERT I. First set the CH 2 VOLTS/DIV control to 50 mV, then Set: 50fi ON!OFF set CHI on and CH2 off. Select CH2 COUPLING/INVERT Set: 50fl ON!OFF m. Move the cable from the CH2 input connector to the CHI input connector.
Page 179 Performance Check and Functional Verification Procedure 2440 Service b. Connect the output of a Leveled Sine-Wave Genera q. Remove the last 10X attenuator from the test setup. tor to the CHI input connector via a 50-12 cable, two 10X attenuators, and a 50-11 terminator.
Page 180 Performance Check and Functional Verification Procedure 2440 Service Set the oscillator to produced 60-Hz, six-division ' Select VERTICAL MODE display. Slightly adjust the output frequency of the oscilla Set: tor to stabilize the 60-Hz display. Set: CH2 VOLTS/DIV 50 mV...
Page 181 Performance Check and Functional Verification Procedure 2440 Service Use the HORIZONTAL POSITION control to position triggered, but any further decrease in period causes an the Trigger Point Indicator (small “T" riding on the unstable display. waveform) to the vertical graticule line 4 divisions left of graticule center.
Page 182 Performance Check and Functional Verification Procedure 2440 Service k. CHECK—That the readout Trigger Point indicator Push front-panel button labeled “MENU OFF/EXTENDED FUNCTIONS" twice to display the (small “T" riding on the displayed waveform) indicates the scope is triggered on the last line of field 2.
Page 183 MEMORY to display that menu. memory contents, If such verification is necessary, it is strongly recommended that it be performed by Tektronix service personnel only. In any case, any Execute Teksecure Erase Memory: Push ERASE. procedure requiring cabinet removal must be referred The instrument screen will blank momentarily and then the to qualified service personnel.
Page 184 ,> Performance. Check and Functional Verification—2430A Service menu; ;T snd push_ ERASE to execute another form parts g and h again to reexecute an Erase Memory. .Erase,-: Memory, .-Then,, if the Erase Memory If status is still failed, this verification fails and the instru- '•...
Page 185: Section 5 Adjustment Procedure
Section 5— 2440 Service ADJUSTMENT PROCEDURE INTRODUCTION IMPORT ANT— PLEASE READ BEFORE USING THIS PROCEDURE This procedure is used to return the instrument to con Display Adjustments in “ Internal Adjustments” subsec tion). The instrument cabinet must be installed and the formance with its “...
Page 186: 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 187: 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) 5X Attenuator (Item 14) Secondary Leveled Sine-Wave Generator (Item 2) Dual-Input Coupler (Item 18) Calibration Generator (Item 3)
Page 188: Adjustment Locations For Displays 4 Through 6
Adjustment Procedure— 2440 Service o. ADJUST— R200 (Geometry control) for the least NOTE 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 189: Display 5—Vertical And Horizontal Gain, Offset, And Vector Compensation Adjustment Pattern
Adjustment Procedure— 2440 Service HORIZON' SIDES ■P wchTir»Ai cm cc PART aa • LARGE CROSS * ' ' ' PARTS V,W,X,Y DTI IS • « • « • • • tOFF fGAIN * 'OFF /GAIN • • IVECO SMALL CROSS ^ PARTS V,W,X,Y •...
Page 190: Display 6— Integrator Time Adjustment Pattern
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 191 Adjustment Procedure— 2440 Service b. Preset clock adjustments: Center all adjustment d. Preset Common-Mode counts: controls shown in Figure 5-4 so they are halfway between full clockwise and ful! counter-clockwise rotation. Display GN-DAC counts: VOLTS/DIV control to 50 mV, and set the SEC/DIV to 500 ns.
Page 192: Ccd Counts Display And Cm Adjustment Menu
Adjustment Procedure—2440 Service CCD CLOCK ADJUSTMENTS CH 2 CH 1 R449 R44B R349 R442 ® ® ® L I D R 35B ® ® ® ® R443 R445 R347 R447 REAR OF L I S L 2 S L I S...
Page 193 Adjustment Procedure-—2440 Service Set CM/GN-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 194 Adjustment Procedure—2440 Service horizontally align its rising edge to center screen. 5. GN-DAC counts check: SEC/DIV should be 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 195 Turn off display vectors: Push the front-panel erator with a highly stable frequency output, button SELECT, and when the menu changes, push such as the TEKTRONIX SG 503. the menu button to set VECTORS ON!OFF to OFF (OFF should be underlined).
Page 196 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 197: Sides 1 And 3 Before Adjustment Of Lis And After
Adjustment Procedure— 2440 Service 1 arid 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. Be sure to adjust the CH 2 LIS and L2S adjustments and not the equivalent CH 1 L-clock adjust...
Page 198: Ch 1 With L-Clocks Correctly Adjusted, But With Stray Samples
Adjustment Procedure—2440 Service screen. Push the MENU OFF/EXTENDED FUNC o. Align an even CH 2 CCD side to an odd: Position TIONS button twice; then push SPECIAL; then push CH 1 up off screen and CH 2 on. Adjust the CH 2 LID for CCD ADJ.
Page 199: Display For Adjusting Ccd A And T Clocks
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 200: Typical Ch 1 And Ch 2 Displays After Clock Adjustment
Adjustment Procedure—2440 Service For SN 5010249 & Below N O T E Mainly check the failing and rising parts of the 7. 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 201: Checking Sample Dispersion
Adjustment Procedure—2440 Service Alias display: Vary the generator output fre quency slightly (if required) until only one or two cycles of the untriggered sine wave are displayed ND MORE THAN i VERTICAL (about ±100 KHz). D IV IS IO N DISPERTION ON EACH CHANNEL 4.
Page 202 Adjustment Procedure—2440 Service Adjust CH 1 transient response: Adjust R436, ADJUST—C414 (near the front edge of the Main C456, and R525 for best front-corner. (These adjustments board) for the same waveform front corner as noted in are located near the front of the instrument on the Main part d.
Page 203 Adjustment Procedure—2440 Service 7. Adjust the 10 mV, mV, and 2 mV Match CH 1 bandwidth at remaining VOLT/DIV 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 204 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 205 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 206: Self Calibration
Adjustment Procedure—2440 Service SELF CALIBRATION Equipment Required: None 1. Seif Calibration NOTE a. Turn the instrument POWER ON 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 207: External Calibration
Adjustment Procedure—2440 Service EXTERNAL CALIBRATION Equipment Required (see Table 4-1): Calibration Generator (Item 3) Press the ATTEN GAIN button again. (“RUN NOTE NING" will be displayed near the lower right corner of J156 must be removed (see step 1 , part a of Internal the screen.)
Page 208 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 instrument to qualified personnel for form the Seif Calibration subsection of this procedure.
Page 209 A d ju s tm en t P ro c e d u re — 24 4 0 S e rv ic e Press the menu button labeled EXT C A L to display N O T E the EXT CAL menu. Then press the menu b u tto n labeled A f t e r s u c c e s s f u l c o m p l e t i o n o f t h e T r i g g e r C a l i b r a t i o n CTE CAL.
Page 211: Section 6 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 212: National Bureau Of Standards Traceability
Maintenance— 2440 Service Manual Adjustments (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 213: 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 214: 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. The...
Page 215 Maintenance—2440 Service corrective procedure for most visible defects is obvious; ) C A U T I O N < however, particular care must be taken if heat-damaged components are found. Overheating usually indicates other trouble in the instrument; it is important, therefore,...
Page 216: Lubrication
Maintenance— 2440 Service Table 6-3 Internal Inspection Check List Item Repair Action Inspect For Circuit Boards Clean solder corrosion with an eraser and Loose, broken i dr corroded solder connec flush with isopropyl alcohol. Resolder defec tions: Burned circuit boards. Burned, bro...
Page 217: 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 218: Multipin Connector
Maintenance—2440 Service for the individual pins or wires distributing the supplies. By Troubleshooting Charts 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 219: Troubleshooting Equipment
Maintenance— 2440 Service TROUBLESHOOTING EQUIPMENT 3. Check Control Settings Incorrect control settings can give a false indication of The equipment listed in Table 4-1 of this manual, or instrument malfunction. If there is any question about the equivalent equipment, may be useful when troubleshooting correct function or operation of any control, refer to either this instrument.
Page 220 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 221: Corrective Maintenance
"Repackaging for Shipment" 5. 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 222: 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 tured for Tektronix, Inc.
Page 223 Removing DIP 1C packages. Augat T il4-1. 11. IC-Removal Tool Reagent grade. Cleaning attenuator 2-Isopropanol. 12. Isopropyl Alcohol. front-panel assemblies. . Tektronix Part Number 13. isolation Isolate the instrument from Transformer3 the ac power source for 006-5953-00. safety. Power supply ripple check. TEKTRONIX...
Page 224: 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, replacing these transistors.
Page 225: Removal And Replacement Procedure
Maintenance—2440 Service Cut off any excess lead protruding through the cir NOTE cuit board (if not clipped to the correct length in Step 3). Some components are difficult to remove from the circuit board due to a bend placed in the component leads during machine insertion.
Page 226: Circuit Board Location
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 227 Maintenance—2440 Service 1. Cabinet Removal W A R N I N G Disconnect the power cord from any ac power source. The line-rectifier capacitors normally retain a charge for several minutes after the Instrument is powered off and can remain charged for a longer period if a...
Page 228 Maintenance— 2440 Service h. Using a 7/32 inch nutdriver, rotate the two black Grasp the left edge of the Timebase/Dispiay board plastic retaining latches counterclockwise 1/4 turn to and rotate it (and the, Top chassis) upward about 45 unlock them. The two retaining latches are located near degrees.
Page 229 Maintenance—2440 Service 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. Take care not to separate the male end of that lead from the female end.
Page 230 Maintenance—2440 Service e. Disconnect the two flex cable connectors at J104 6. Side Board Removal and J108, and the ribbon cable connector at J105. J104, a. Perform Step 1 to remove the cabinet from the J105, and J108 are located near the right-front corner of instrument.
Page 231 Maintenance—2440 Service Disconnect the remaining ribbon connector from Reverse parts a through I to install the Side board in 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 232 Maintenance—2440 Service Grasp the front of the Low Voltage Power Supply d. Disconnect the ribbon cable connector at J.14,8 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 233: Installation Sequence For Installing The Crt Frame Screws
Maintenance—2440 Service I. Remove the eight screws (two at each corner) secur e. Disconnect the crt anode lead (male end) from the 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 234 Maintenance— 2440 Service Perform parts c through i of Step 4 to remove the c. Insert the tip of a short screwdriver through the trim band from the instrument. large slot in the front "casting (above arid right Of the asso...
Page 235: Diagnostics And Internal Calibration Routines
Maintenance—2440 Service DIAGNOSTICS AND INTERNAL CALIBRATION ROUTINES In addition to the calibration and diagnostic routines INTRODUCTION 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 236 Maintenance—2440 Service EXT CAL <status> <status> <status> <warm-up-msg> SELF SELF Extended Calibration is an interactive procedure requir DIAG DIAG ing a Calibration Generator that produces accurate dc volt ages and a fast-rise pulse. The dc voltages are used to verify the internal 10-V Calibration Reference and to adjust Pushing SELF CAL runs the previously described rou...
Page 237: Diagnostic Routines
Maintenance—2440 Service (EXT DIAG). Both types can be executed from scope a failure occurs, <STATUS> is not immediately updated; menus. The Self Diagnostics, as well as those subtests rather, a new test must be run to determine current status: below the 7000-9000 level that run when EXT CAL is exe...
Page 238 Maintenance— 2440 Service Any individual test selected can be made to loop to 1. Levels 3700 and 3800 may only be executed isolate signal path problems with external test and from EXT D IAG S and then only if internal jumper...
Page 239: Diagnostics Operation
Maintenance—2440 Service DIAG again. If failure prevents display of the EXT menu, you must turn off the scope and turn it back on again to rerun the tests. It takes a little practice to read the failure ° codes from the LEDs.
Page 240: Main Ext Diag Menu
Maintenance— 2440 Service Pushing EXT DIAG displays the main Extend Diagnos NOTE 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 follow ed b y an asterisk is n o t testable. The number is “0000".
Page 241 Maintenance—2440 Service level in the displayed menu) and pressing RUN/SEL NOTE selects another lower-level submenu where the 3500 level The status fo r sublevel tests in the EXT DIAG test is the top level. This process can be continued until menus can also be blank.
Page 242 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 was an EXT CAL (or near-normal) operation may be recovered by the user test that failed.)
Page 243 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 must be performed to return the instrument to its ambient temperature.
Page 244: Via The Gp1B 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 245: 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 246: Initial Troubleshooting Chart................................................................ -
Maintenance— 2440 Service 6603-33 Figure 6-6. Initial troubleshooting chart. 6-36...
Page 247 Maintenance— 2440 Service Table 6-6 2440 Troubleshooting Procedures INITIAL INDICATIONS TESTS FOR Are TRIGGER LEDs flashing? If all lights are flashing, suspect Waveform nP ROM U480 or U490 LIFE (diagram 2) or their selects. 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 248 Timebase troubleshooting chart (Ideated in the “Diagrams" section) and troubleshoot the System Clocks. NOTE Use 2440 CURSOR function o f 1/TIME to measure the frequency. The cursor posi tion difference will read out directly in frequency. Check U381 pin 9 for 10 MHz.
Page 249 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.
Page 250 Maintenance— 2440 Service Table 6-6 (cont) GPIB GPIB Test for Activity (schematic diagram 20): Press the OUTPUT 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 251: Mux Test Waveforms
MUXSEL2 at R800 pin 4. Set the SEC/DIV switch to 100 M s and the VOLTS/D1V 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 252 M aintenance-2440 Service Table 6-6 fcbht) 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 te rotated through the continuous range (not its end-switching region).
Page 253 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/D1V to 100 fis, and VOLTS/PIV to 2 V. Probe A12U754 pin 5 for clock pulses.
Page 254 Maintenance— 2440 Service Table 6-6 (cont) Force DAC Ranges " ' FORCE DAC Values/ Effect of Voltage Range Output Output DAC Voltage After Increasing Value Location Cold Start 4095 U641-7 -1 .37 Trace shifts down CHIBal 2048/—0.50 1.36 V U641-1...
Page 255 Maintenance— 2440 Service Table 6-6 (cont) Force DAC Ranges FORCE DAC Values/ Voltage Range Effect of DAC Voltage After Output Output Increasing Value Cold Start Location 4095 1650/—0.27 V +4.76 CM20 U640-7 + 12.1 CH 2 CCD Sides 1 and 3 offset from 2 and 4.
Page 256 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 257 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 258 Machine (see the “ No Display" troubleshooting tree at the back of this manual). * 1 2 SYSTEM>P 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 259 Vertical Deflection Bad (Horizontal stripe only) or Horizontal Deflection Bad (Vertical stripe only). * 2 1" Press PRGM“aTfdThen"press^the+tfth“menu“selectioni3utton-to-do-a-PANEtHNIT;— 2. 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. 6-49...
Page 260 (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.) Troubleshoot as necessary if incorrect waveforms are found.
Page 261 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 ROM0.1 (U682).
Page 262 Maintenance— 2440 Service Table 6-6 (cont) 1310 ROMO. 1-9 3rd quarter of A12U682 ( page 9 ) 1310 ROMO.I-D 4th quarter of A12U682 { page D ) 1410ROM0.2-2 1st quarter of A12U690 ( page 2 ) 1410 ROMO.2-6 2nd quarter of A12U690 ( page 6 ) 1410 ROM0.2-A...
Page 263 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 = T (stuck at zero).
Page 264 Maintenance— 2440 Service Table 6-6 (cont) 2130 BUSTAKE Page Control Register A121)860 (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 265 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 266 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 WRR on U550 pin 9 goes LO-to-HI.
Page 267 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 WORD TRIG, there should be four clock pulses, one at each end of the trigger strobe and two under it.
Page 268 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 269 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 Ml SC to be LO during the time of the trigger strobe.
Page 270 Maintenance— 2440 Service Table 6-6 (cont) 2230 Display Control Register A11U530 and A11U531 (schematic diagram 17): DISCON Testing Method: The DISCON (display control) register is two components, latch U530 and read-back buffer U531. The test result is set to PASS, any failure sets it to FAIL.
Page 271 Maintenance— 2440 Service Table 6-6 (cont) Volts Cursors Register A11U241 (schematic diagram 16) Testing Method: 2310 VCURS The Volts Cursors Register test checks two components; latch U241 readback is via Diagnostic Buffer U141. The test result is set to PASS, any failure sets it to FAIL.
Page 272 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 273 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 274 Maintenance—'2440 Service Table 6-6 (cont) Test 1. 10100101 is loaded and read back via U243. Test result is set to fail if not.a match on bits 0 through 5. Test 2. 01001011 is loaded and read back via U243. Test result is set to fail if not a match on bits 0 through 5.
Page 275 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 276 Maintenance— 2440 Service Table 6-6 (cont) NOTE QO through Q3 0, and Q4 through Q11 map to DO to D7. i.e., Q7 = D3. By knowing which te st FAILs and the b it pattern, one m ay easily determine the problem bit(s) (look fo r the b it column in the failed tests that are the same).
Page 277 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 10 ^s from the LO-to-HI transition of the trigger pulse.
Page 278 Maintenance— 2440 Service Table 6-6 (cont) Using the CH 2 probe: Run test 2370 in CONTINUOUS 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 279 Maintenance— 2440 Service Table 6-6 (cent) 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 (J641 pin 18 is DO.
Page 280 Maintenance—-2440 Service Table 6-6 (cont) 2510 INIT Acquisition Control Shift Registers A10U270 (Gate Array), A10U530 (Peak Detector), A10U140 (Trig SHIFT REGS .. Control), DAC Input Shift Register A10U850/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 281 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 282 NOTE For the following, se t the Trigger Position o f the te s t 2440 to 3/4. i f using an analog scope fo r testing, use the appropriate holdoff and trigg er level to view the signals o f interest.
Page 283 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 284 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 285 Maintenance— 2440 Service Table 6-6 (cont) 3200 RAM A11U440 (schematic diagram 16): A11U440 ______________ ________________________ ________________________________________ 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, pin 18, and trigger the scope on the CH 1 signal.
Page 286 Maintenance— 2440 Service Table 6-6 (cont) 3400 RAM A11U430 (schematic diagram 16): A11U430 _ ______ Troubleshooting Procedure: If test = FAIL then look for failure and correct using the following steps: Run test 3410 in CONTINUOUS mode. Using CH 1 probe: Check the write enable to U430 (WRA, pin 8) for activity and trigger on the signal if active.
Page 287 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 288 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 11,12,11,15.16,17,18,18) for activity.
Page 289 Maintenance— 2440 Service Table 6-6 (cont) Troubleshooting Front-Panel pP 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 290 Maintenance— 2440 Service Table 6-6 (cont) NOTE Since the Front Panel fiP 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 291 Maintenance— 2440 Service Table 6-6 (cont) Check for L0 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. 4600 A13U742/A13U751: Check for a pattern of 10100101 at U742 pin 19, 16, 15, 12, 9, 6, 5, and 2 at the rising edge of the trigger strobe (Word Recognizer Probe is useful for this check).
Page 292 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 293 .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 294 Maintenance— 2440 Service Table 6-6 (cont) WARMING ff 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), incinerate, or expose contents o f the battery to water.
Page 295 Maintenance— 2440 Service Table 6-6 (cent) CCD/CLGCK 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 ASSUME THE HARDWARE IS DEFECTIVE UNLESS THE SAME TEST FAILS A SELF CAL.
Page 296 (CCDOD21+/CCDOD21-, CCDOD22+/CCDOD22-, CCDOD23+/CCDOD23-, and CDOD24+/CCDOD24-). Input the 2440 calibrator signal to the channel that is not operating properly,. If neither is work- in grstart*tf 'componariS'are referenced; see NOTE above.) Set the bad channel to 100 mV/div, DC coupled, with 50 Q termination off. Adjust the screen waveform so the ground dot on the scope under test is 2 divisions below center screen if possible.
Page 297 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 298 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 ASSUME THE HARDWARE IS...
Page 299 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 300 Maintenance— 2440 Service Table 6-6 (cont) Acquisition System Position Offset: 8100 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 301 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 302 Maintenance— 2440 Service Table 6-6 (cont) 8400 Testing Method: PREAMP GAIN and 8500 During calibration, gain constants are computed by using the Balance control to position +2.5 and PREAMP. —2.5 divisions , and computing the next gain DAC- value until the result is set to be within INVERT GAIN specifications.
Page 303 Maintenance— 2440 Service Table 6-6 (cont) Channel 1 and Channel 2 Attenuators AT400 and AT300 (schematic diagram 9): 8700 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 304 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, Q621, U520, and associated components) on diagram 9.
Page 305 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 306 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 307 Maintenance— 2440 Service Table 6-6 (cont) CHI 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 308 Maintenance— 2440 Service Table 6-6 (cent) 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 309 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 310 Maintenance— 2440 Service Table 6-6 (cent) 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 .
Page 311 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 HMMIO 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 312 Maintenance— 2440 Service Table 6-6 (cont) — HMMIO 6000-6FFF | - - NVRAM 7000-77FF j r --- SYSRAM 7800-7FFF I I f ROMQ. X ROM1 B O O O - » 4 « * ■ « C000- ► BFFF | FFFF...
Page 313 Maintenance— 2440 Service Table 6-6 (cont) WAVEFORM nP Waveform nP Kernel Mode: This mode is used when a fault has been found on either the System mP data bus or the System nP address bus while in the BUS CONNECT mode or when SELF TEST 5100 (RUN TASK) fails in the Extended Diagnostics menu.
Page 314 Maintenance— 2440 Service Table 6-7 Video Option Troubleshooting VIDEO Video Option (schematic diagram 21): OPTION FAULT If VIDEO is pressed and an error message of “VIDEO OPTION NOT INSTALLED OR FAULTY" is displayed, then the power-on SELF TEST has detected a problem (assuming the Video Option is installed).
Page 315 Maintenance— 2440 Service Table 6-7 (cont) Auto triggering or unstable trigger in VIDEO CPLG: VIDEO 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 316 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 *ts 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 o f +4.5 V.
Page 317 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 ns 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 318 Maintenance— 2440 Service Table 6-7 (cont) Did Ahe.GH 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 319 Maintenance—2440 Service Table 6-8 (cont) GPIB SETUP (OUTPUT) MEASURE Controls DEBUG MARK LONG DISPLAY LOCK WINDOW PATH METHOD MIN/MAX RQS Mask LEVEL (units) OPC Mask ON ! LEVEL (settings) CER Mask PROXIMAL 10%/0.4 volts EXR Mask MESIAL 50%/1.3 volts EXW Mask MESIAL2 50%/1.3 volts...
Page 320 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 PREFLD Line Start...
Page 321 Maintenance—2440 Service Cut off any excess lead protruding through the cir NOTE cuit board (if not clipped to the correct length in Step 3). Some components are difficult to remove from the circuit board due to a bend placed in the component leads during machine insertion.
Page 322 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 323 Maintenance— 2440 Service 1. Cabinet Removal W A R N I N G a. Disconnect the power cord from any ac power source. The line-rectifier capacitors normally retain a charge for several minutes after the instrument is powered off and can remain charged for a longer period if a b.
Page 324 Maintenance— 2440 Service Grasp the left edge of the Timebase/Display board Using a 7/32 inch nutdriver, rotate the two black and rotate it (and the Top chassis) upward about 45 plastic retaining latches counterclockwise 1/4 turn to degrees. While supporting the Top chassis, disconnect the unlock them.
Page 325 Maintenance—2440 Service p. Remove the anode lead from its retainer and dress c. Pull straight out on the INTENSITY control knob to it away from the lower square hole in the Main chassis. remove it from its shaft. Take care not to separate the male end of that lead from the female end.
Page 326 Maintenance—2440 Service e. Disconnect the two flex cable connectors at J104 6. Side Board Removal and J108; and the ribbon cable connector at J105. J104, a. Perform Step 1 to remove the cabinet from the J105, and J108 are located near the right-front corner of instrument.
Page 327 Maintenance—2440 Service Disconnect the remaining ribbon connector from Reverse parts a through I to install the Side board in J105 on the Main board. the instrument. Take care to fit the rear edge of the board to the channel notch when reinstalling to the chassis.
Page 328 Maintenance— 2440 Service d. Disconnect the ribbon cable connector at J148 of p. Grasp the front of the Low Voltage Power Supply the Timebase/Display board. bracket and lift up until the Low Voltage Power Supply board is clear of.the retaining latches unlocked in. part m.
Page 329 Maintenance— 2440 Service I. Remove the eight screws (two at each corner) secur e. Disconnect the crt anode lead (male end) from the 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 330 Maintenance—2440 Service Insert the tip of a short screwdriver through the Perform parts c through i of Step 4 to remove the trim band from the instrument. large slot in the front casting (above and right of the asso ciated input BNC connector). Remove the screw securing the front of the Attenuator to the Main board.
Page 331: Section 7 Options And Accessories
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 332: 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 CRT Filter, Clear Plastic 378-0208-00 the Word Recognizer Probe optional accessory.. Instru 1 Front Cover 200-3199-01 ments purchased with Option—03 include the WR Probe.
Page 333: Section 8 Replaceable Electrical Parts
A2 with its sub- If a part you have ordered lias been replaced with a new or assemblies'and parts)........-----... - ..improved part, your local Tektronix, Inc. Field Office or represen tative will contact you concerning change in part number.
Page 334 Replaceable E le c tric a l Parts - 2440 Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. ' Code Manufacturer________________ Address City. State. Zip Cede 00213 NYTRONICS COMPONENTS GROUP INC ORANGE ST DARLINGTON SC 29532 SUBSIDIARY OF NYTRONICS INC...
Page 335 Replaceable E le c tric a l Parts - 2440 Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. Citv. State, Zip Code Address Code Manufacturer NORWOOD MA 02062 RT 1 INDUSTRIAL PK 24355 ANALOG DEVICES INC PO BOX 9106...
Page 336 Replaceable E le c tric a l Parts - 2440 Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER M fr. Code Address M a n u fa c tu r e r City. State. ZiD Code SANYO ELECTRIC CO LTD...
Page 337 Replaceable E le c tric a l Parts - 2440 Service Mfr. Serial/Assembly No. Tektronix Code Mfr. Part No. Name & Description Effective Dscont Ccnconent No. Part No. 80009 671-0365-00 CIRCUIT BD ASSY:MAIN 671-0365-00. B010100 B010185 671-0365-02 80009 CIRCUIT BD ASSY:MAIN...
Page 338 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assert)!y No. Mfr. Conocnent No. Part No. Effective Dscont Cods Mfr. Part No. ' Name & Descriotion : 671-0365-00 B010100 B01Q185 671-0365-00 ' ' CIRCUIT BD ASSY :MAIN ' v...
Page 339 Replaceable Electrical Parts - 2440 Service Mfr. Serial/Assembly No. Tektronix Code Mfr. Part No. Name & Description Effective Dscont Caroonent No. Part No. 4' V 59660 CAP,VAR,CER DI:l-5PF,+2 -2.5%,10OV 513-011A1-5 2B1-0218-00 A10C257 54583 MA12X7R1H223M-T CAP,FXD,CER DI:0.022UF,20%,50V 281-0909-00 A10C2B0 55680 UVX1E470MAA1TD...
Page 340 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assaibly No. Hfr. Canoarient No. Part No. Effective Dscont Name & DescriDtion Code ...Hfr. Part No. A10C473" 281-C909-00 CAP,FXD.CER DI:0.022UF,20%r 50V 54583 MA12X7R1H223M-T A10C474 281-0909-00 CAP.FXD.CER DI:0.022UF,20%,50V 54583...
Page 341 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Name & Description Canoonent No. Part No. Effective Dscont 54583 MA12X7R1H223M-T CAP,FXD,CER DI:0.022UF,20%,50V . A10C654 • 281-0909-00 54583 MA12X7R1H223M-T CAP,FXD,CER DI:0.022UF.20%,50V...
Page 342 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Conoonent No. Name & Description Code Mfr. Part No. Part No. Effective Dscont A10C835 CAP,FXD, MTLZD:6.47UF,10%,50V 55112 1850.47K50ABB .285-1301-01 A10C840 . . CAP,FXD,MTLZD:0.47UF.10%,50V 55112 1850.47K50ABB...
Page 343 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assanbly No. Mfr. Code Mfr. Part No. CaiDonent No. Part No. Effective Dscont Nans & Description SEMIC0ND DVC,DI:SW,SI ,30V,150MA,30V,D0-35 03508 DA2527 (1N4152) 152-0141-02 A10CR581 SEMICOND DVC,DI:VVC,30V,11.5PF,A276 50101 Ull-4101...
Page 344 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Asseifoly No. Mfr. Canconent No. Part No. Effective Code Mfr. Part No. Dscont- Name & Descriution A10J2002 131-0679-13 131-0679-13 7 CONTACT,ELEC:2 CONTACT,BNC 80009 — ---- A10J2004 (PART OF A10AT400)
Page 345 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Name & DescriDtion Part No. Effective Dscont Caroonent No. 80009 151-0188-00 TRANSISTOR:PNP,SI,TO-92 151-0188-00 A10Q251 80009 151-0188-00 TRANSIST0R:PNP,SI,T0-92 A10Q270 151-0188-00 80009 151-0190-00...
Page 346 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assaifcly No. Mfr. Canxnent No. Part No. Dscont Effective Name & Descriution Cods Mfr. Part No. A10Q885 151-0216-04 ' TRANSIST0R:PNP,SI,T0-92 04713 SPS8803RL A10Q970 151-0190-00 TRANSISTOR:NPN,SI, TO-92 80009 151-0190-00...
Page 347 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Code Mfr. Part No. Part No. Effective Dscont Nans & Description Component No. 19701 5033ED16K50F RES.FXD,F1LM:16.5K OHM,1%.0.125W, A10R236 321-0310-00 19701 5033ED16K50F RES,FXD,FILM:16.5K 0M,1%,D.125W,TC=TD A10R237 321-0310-00...
Page 348 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial /Assaibly No. Mfr. Component No. Part No. Effective Dscont Code Mfr. Part No. Name & Description A10R347 311-2234-00 TK1450 GF06JT 5K RES,VAR,NDNUWiTRMR,5K OHM,20%,0.5W LINEAR A10R348 311-2234-00 . RES, VAR, NONW: TRMR, 5K OHM,20%0.5W LINEAR...
Page 349 Replaceable E le c tric a l Parts - 2440 Service Teictronix Serial/Assembly No. Mfr. Code Mfr. Part No. Nans & Description Caroonent No. Part No. Effective Dscont 57668 TR20JE 03K3 RES,FXD,FILM:3.3K 0HM,5%,0.2W 313-1332-00 B010250 A10R438 RES, FXD,FILM:301 OHM,1%,0.125W,TC=T0 07716...
Page 350 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenfcly No. Mfr. Caiccnent No . Part No. Effective Dscont Name & Description Code Mfr. Part No. A10R523 315-0220-00 RES,FXD,FILM:22 OHM,5%,0.25W 19701 5043CX22R00J A10R525 311-2229-00 RES,VAR,N0NWW:TRMR,250 0HM,20%,0.5W LINEAR...
Page 351 Replaceable Electrical Parts - 2440 Service Seri a!/Assembly No. Mfr. Tektronix Name & Description Coda Mfr. Part No. Part No. Effective Dscont ■ v Ccnpcnent No. 07716 RES, FXD, FI LM: 5.49K OEM, 1%, 0.125Wr TC=T0 CEAD549D0C A10RB27 321-0264-00 07716 321-0295-00 RES,FXD,FILM:11.5K OHM,1%,0.125W,TC=T0...
Page 352 Replaceable Electrical Parts - 2440 Service Tektronix Serial/Asssifely No. Hfr. Name & Description Ccmoonent No. Part No. EffectiveDscont Code Mff. Part No. A10R710 RES NTV/K, FXD,FI: 10K 0HM,2Q%,(9)RES 307-0446-00 11236 750-101-R10K A10R726 321-0295-00 RES,FXD,FILM:11.5K 0WU%,0.125W,TC=T0 CEAD11501F 07716 A10R730 RES,FXD,FILM:5.49K 0HM,1%,0.125W,TC=T0...
Page 353 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assent)! y No. Mfr. Dscont Name & Description Cods Mfr. Part No. Ccnponent No. Part No. Effective 19701 5043CX10KDOJ RES,FXD,FILM:10K 0HM,5%,0.25W A10R828 315-0103-00 19701 RES,FXD,FILM:10.OK 0HM,1%,0.125W,TC=T0 5033ED10KDF A10R830...
Page 354 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenfcly No. Mfr. Caroonent No. Part No. Cocte Effective Dscont Name & OescriDtion Mfr. Part No. , 131-0608-00 A10TP288 ' ' TERMINAL,PIN:0.3c5 L X 0.025 BRZ GLD PL...
Page 355 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Name & Description Code Mfr. Part No. Ccnoonent No. Part No. Effective Dscont 80009 A10U770 156-1272-00 MICR0CKT,LINEAR: DUAL OPERATIONAL AMPLIFIER 156-1272-00 MICR0CKT,LINEAR: DUAL OPERATIONAL AMPLIFIER...
Page 356 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenfcly No. Hfr. Caiucnent No. Effective Dscorrt Part No. Name & Descriotion Cods Mfr. Part No. 671-0366-00 B010100. ' 3010504 CIRCUIT BD ASSY:TIME BASE DISPLAY 80009 671-0366-00 671-0366-01 B010505...
Page 357 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assent! y No. Code Mfr. P a rt No. Name & Description Effective Dscont Canoonent No. Part No. 54583 MA12X7R1H223MtT CAP,FXD,CER DI:0.022UF,20%,50V 281-0909-00 A11C520 54583 MA12X7R1H223M-T CAP, FXD,CER DI:0.022UF,20%,50V...
Page 358 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenbly No. Hfr. Cancanent No. Part No. Name & Description Code Mfr. Part No. Effective Dscont A11C881 281-0758-00 B010330 04222 SA102A150MAA CAP, FXD.CER 01:15PF,20%,100V (STANDARD ONLY) Ailc881 281-0758-00...
Page 359 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Part No. Effective Dscont Name & Description Mfr. Part No. Cormnent No. RES,FXD,FILM:5K 0HM,1/.,0.125W,TC=TD 24546 NA55D5D01F A11R156 321-0816-00 RES,FXDr FILM:5K OHM,1%,0.125W,TC=T0 24546 NA55D5001F AUR160...
Page 360 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenbly No. Mfr. Effective CatDonent No. Dscont Name & DescriDtion Code Mfr: Part No. Part No. A11R501 315-0101-00 ' RES,FXDrFILM:100 OHM,5%,0.25W '57668 NTR25J-E lOOE 57668 A11R522 315-0560-00 RES,FXD,FILM:56 OHM,5%,0.25W NTR25J-E56E0 A11R530 ■...
Page 361 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Name & Description Coda Mfr. Part No. Ccnponent No. Part No. Effective Dscont RES,FXD,FILM:49.9 OHM.1%,0.2W,TC=T0 80009 322-3068-00 A11R891 322-3068-00 B010330 (STANDARD ONLY) RES,FXD,FILM:49.9 0HM,1“ / .,0.2W,TC=T0...
Page 362 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Hfr. Conconent No. Part No. Effective Dscont Nane & Description Code Hfr. Part No. A11U411 156-0386-00 :' MICRXKT,DGTL:TRIrLE 3-INP NANO GATE 01295 SN74LS10(N OR J) A11U412...
Page 363 Replaceable Electrical Parts - 2440 Service Mfr. Tektronix Serial/Asssnbly No. Code Mfr. Part No. Nans & Description Component No. Part No. Effective Dscont 156-3353-01 80009 MICROCKT,DGTL:CMOS,SEMI CUSTOM,STD CELL 156-3353-01 A11UG70 (2440M) 18324 N74LS244(N OR F) MICROCKT,DGTL:OCTAL BFR W/3 STATE OUT...
Page 364 Replaceable Electrical Parts - 2440 Service Tektronix Serial/Assarbly No. , Mfr. ucrmnern: no. rare no. tTTective uscone Name 8 Descriotion Cods Mfr. Part No. 670-9746-17 .. CIRCUIT 3D ASSY:PROCESSOR 80009 670-9746-17 (STANDARD ONLY)' 670-9745-25 CIRCUIT BD ASSY:PROCESSOR 80009 670-9746-25 (OPTION 05 ONLY)
Page 365 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assart!y No. Code Mfr. Part No. Name & DescriDtion Part No. Effective Dscont Comment No. 54583 MA12X7R1H223M-T CAP,FXD,CER D1:0.022UF,20%,50V A12C462 281-0909-00 54583 MA12X7R1H223M-T CAP,FXD.CER DI:0.D22UF,2D%,50V 281-0909-00 A12C464...
Page 366 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Asseniily No. Mfr. Canocnerrt No. Part No. Effective Dscont Nane & Description Code ■ Mfr. Part No. 54583 A12C780 281-0909-00 CAP.FXO.CER DI:0.022UF,20%,50V MA12X7R1H223M-T A12C790 CAP,FXD.CER. DI:0.022UF,20%,50V 54583 281-0909-00 MA12X7R1H223M-T A12C850.
Page 367 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Part No. Effective Dscont Name & Description Canxnent No. • (OPTION 05 ONLY) SEMICOND DVC,DI:SW,SI,30V,150MA,30V,D0-35 03508 DA2527 (1N4152) 152-0141-02 A12CR722 SEMIC0ND DVC,DI:SCH0TTKY,SI,60V,2.25PF...
Page 368 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Ccnocnent No. Part No. Effective Dscont Nane & Description Cede Mfr. Part No. A12Q512 151-0188-00 TRANSISTOR:PNP;SI,TO-92 80009 151-0188-00 (OPTION 05 ONLY) A12Q514 151-1059-00 TRANSIST0R:FET, N-CHAN, 30NW, TO-92 CASE...
Page 369 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Code Mfr. Part No. Name & DescriDtion Part No. Effective Dscont Ccmponent No. (OPTION 05 ONLY) 57B68 NTR25J-E12K0 RES,FXD,FILM:12K OHM,5%,0.25W 315-0123-00 A12R324 (OPTION 05 ONLY) 57668 NTR25J-E150K RES,FXD,FILM:150K OHM,5%,0.25W...
Page 370 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Coroonent No. Part No. Effecti ve Dscont Name & Descriotion Code Mfr. Part No. (OPTION 05 ONLY) A12R417 315-0103-00 RES,FXD,FILM:10K 0HM,5%,0,25W. 19701 5043CX10K00J (OPTION 05 ONLY)
Page 371 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Name & Description Part No. Effective Dscont Conxment No. 57668- NTR25JE01K0 ' RES.FXD,FILMtlK 0HM,5%,0.25W A12R609 315-0102-00 (OPTION 05 ONLY) 01121 CB4755 RES,FXD,FILM:4.7M 0HM,5%D.25W...
Page 372 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Ccnoonent No. Part No. Effective Dscont Name & DescriDtion Code Mfr. Part No. A12R822 313-1560-00 RES,FXD.FILM:56 OHM,57=,0.2W 57668 TR20JE 56E A12R830 307-0675-00 .RES NTWK,FXD,FI:9,1K 0HM,2%1.25W...
Page 373 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Canwnent No. Effective Dscont Naie & Description Part No. MICROCKT,DGTL:ASTTL,DUAL 4 INP MUX 04713 MC74F153 ND/JD A12U366 156-1662-00 02735 MICR0CKT,L1NEAR:3 NPN,2 PNP.XSTR ARRAY...
Page 374 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Dscont Caroonent No. Effective Name & Descrirrtion Mfr. Part No. Part No..Code ' ; 160-4941-01 B010198 B010662 : A12U670 MICRXKT, DGTL: 16384 X 8 EPROM,PRGM...
Page 375 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assent! y No. Mfr. Code Mfr. Part No. Name & Description Part No. Effective Dscont Caroonent No. MICROCKT, DGTL: OCTAL D FF W/CLR 80009 156-0865-00 156-0865-00 A12U754 80009...
Page 376 Replaceable E le c tric a l Parts - 2440 Service T e k tro n ix S e ria l/A s s e n b ly N o . H fr. N a r ie & D e s c rip tio n P a rt N o .
Page 377 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Coda Name & Description Mfr. Part No. Component No. Part No. Effective Dscont TRANSISTOR:PNP,SI,TO-92 80009 151-0188-00 A13Q761 151-0188-00 80009 151-0188-00 TRANSISTOR:PNP,SI,TO-92 A13Q771 151-0188-00 80009 151-0188-00...
Page 378 Replaceable E le c tric a l Parts - 2440 Service .Tektronix Serial/Assaribly No. Kff. Camonent No. Part No. Effective Dscont Name & Descriotion Code ttfr. Part No. A13R871 313-1102-00 RES,FXD,FILM:IK OHM,5%,0.2W 57668 TR20JE01KD A13R881 313-1103-00 57668 RES,FXD,FILM;10K 0HM,5%,0.2W TR20JE10K0...
Page 379 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Name & Description Mfr. Part No. Component No. Part No. Effective Dscont 80009 ■ 614-0752-00 FRONT PNL ASSY:STANDARD 614-0752-00 (STANDARD) 80009 614-0753-00 614-0753-00 FRONT PNL ASSY:TV OPT 05...
Page 380 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix; Serial/Assentily No. CaiDcnent No..Part No.. Effective Dscont Name 6 Descriuticfi Code Mfr. Part No. A14DS903 150-1109-00 LT EMITTING OIC:GREEN,SOMA 50434 QLMP-0549 ■ i _ : LT EMITTING DIO:GREEN,30MA A14DS904 ■...
Page 381 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Name & Description_____________ _ Component No. Part No. Effective Dscont 59821 2LL199NB0210B8 SWITCH,PUSH:1 BTN,1 POLE.TRIGGER 260-2088-00 A14S964 59821 2LL199NB021068 SWITCH,PUSH:1 BTN.l POLE,TRIGGER...
Page 382 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenbly No. Mfr. Caioonent No. Part No._____ Effective Dscont ... Nam e & Description ________ Code Hfr. Part Ho. 175-3270-01 FLEX CKT ASSY:6PIB r POLYMIDE 80009 175-9270-01 A15DS920...
Page 383 Replaceable Electrical Parts - 2440 Service Tektronix Serial/Assembly No. Mfr. Code Mfr. Part No. Name & Description Part No. Effective Dscont Conoonent No. 80009 670-9902-01 CIRCUIT BD ASSY:LV PWR SPLY 670-9902-01 00853 DCM681T200AL2PC CAP,FXD,ELCTLT:680UF,+50-10%,200V A16C105 290-1022-00 05397 T3228105K035AS CAP,FXD,ELCTLT:1UF,10%,35V 290-0183-00...
Page 384 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. Hfr. Component No. Part No._____ Effective Dscont Nam e S Description Code H fr. Part No. A16C900 290-0183-00 05397 ’ T3228105K035AS ■ ■ CAP, FXD,ELCtLf: 1UF,1C%, 35 V A16C901 .
Page 385 Replaceable E le c tric a l Parts - 2440 Service Mfr. Serial/Assent)]y No. Tektronix Code Mfr. Part No. Dscont Name & Description Component No. Part No. Effective 80009 108-1234-00 COIL,RF:FIXED,5UH A1BL256 108-1234-00 80009 108-1234-00 COIL, RF: FIXED, 5 m...
Page 386 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assembly No. . Mfr. Ccrocnent No. Part No. Effective Dscont Name & Descriotion Code Mff. Part No. A16R240 ■ '321-0932-00 RES,FXD,FILM:2:5K OHM,1%,0.125W,TC=T0 24546 NA55D2501F A16R244 315-0753-00 RES,FXD,FILM:75K 0HM,5%,0.25W 57668 .
Page 387 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenbly No. Mfr. Name & Description Code Mfr. Part No. Component No. Part No. Effective Dscont 57668 RES,FXD,FILM.-47 0HM,5%,D.25W NTR25J-E47E0 A16R724 315-0470-00 91637 RS1A-90-R2J RES,FXD, WW:0.2 0HM,5%,1/0W A16R727 308-0843-00 RES, FXD, FILM:806 OHM,1%,0.125W,TC=T0...
Page 388 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assaibly No. Mfr. Ccnrianent No. Part No. Effective Dscont Code Nam e & DescriDtion Mfr. Part No. A16U155 156-0885-00 04713 . CPLR,0PT0ELECTR: LED, 5KV ISOLATION SO C 123A...
Page 389 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Nam e & Description Component No. Part No. Effective Dscont 80009 670-9748-00 CIRCUIT B D ASSYtHV P O W E R SPLY...
Page 390 Replaceable E le c tric a l P a rts '- 2440 Service Tektronix Serial/Assaibly No. Mfr, Ccnuonent No. Part No. Effective Dscont ..Name & Descriotion Code Mfr. Part No. A17Q269 ' 151-0443-00 04713 SPS7950 . TRANSISTOR:PNP,SI,T0-92 A17Q500 151-0443-00 TRANSISTOR:PNP,SI,T0-92...
Page 391 Replaceable E le c tric a l Parts - 2440 Service Hfr. Serial/Assembly No. Tektronix Cocte H fr. Part No. Nare & Description Effective Dscont Component No. Part No. CB1025 01121 R E S tFXD,CMPSN:IK. 0 H M , 5 % 0 . 2 5 W...
Page 392 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assent!y No. Mfr. Carocnent No. Part No. E ffective Dscont Name & Description Code M fr. Part No. 670-7280-00 CIRCUIT. BD ASSY: SCALE ILLUM 80009 670-7280-00 A18DS100 150-0057-01 , .
Page 393 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assarfcly No. Code Mfr. Part No. Name & Description Conoonent No. Part No. Effective Dscont 80009 671-0367-00 CIRCUIT BD ASSY:CCD OUT 671-0367-00 04222 MA101A510GAA CAP,FXD,CER DI:51PF,1%100V 281-0798-00...
Page 394 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assenbly No. M fr. Comment No. Part No. Effective Dscont Nane & Descriution Cods M fr. Part No. 671-0367-00 CIRCUIT BD ASSY:CCD O U T 80009 671-0367-00 A31C114 281-0798-00 CAP.FXD.CER DI:51PF,1%,100V...
Page 395 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assent)! y No. & Cods M fr. Part No. Part No. Effective Dscont Nam e Description Catoonent No. B0009 671-0367-00 CIRCUIT BD ASSY:CCD OUT 671-0367-00 04222 MA101A510GAA CAP,FXD,CER DI:51PF,1%.100V...
Page 396 Replaceable E le c tric a l Parts - 2440 Service Tektronix Serial/Assaifcly No. Mfr. CcmDonent No. Part No. Effective Dscont Name & Description Code Mfr. Part No..671-0367-00 CIRCUIT BD ASSY:CCD OUT 80009 671-0367-00 A33C114 281-0798-00 CAP,FXD,CER 01:51PF,1%,100V...
Page 397 Replaceable E le c tric a l Parts - 2440 Service Mfr. Tektronix Serial/Assembly No. Code Mfr. Part No. Name & Description Part No. Effective Dscont Corocnent No. 800D9 119-1770-01 FAN, TUBEAXIAL:12V,1.72 W,42 CFM W/CONN B1000 119-1770-01 MTH-CW-5 714D0 FUSE, CARTRIDGE.-3AG, 5A, 250V, D.8SEC...

Tektronix 2440 Manual

List of Illustrations

List of Tables

Operators Safety Summary

Servicing Safety Summary

1 Dimensional Drawing

3 Simplified Block Diagram

Section 4 PERFORMANCE CHECK and FUNCTIONAL VERIFICATION PROCEDURE

6 Multipin Connector

Section 7 OPTIONS and ACCESSORIES

Section 8 REPLACEABLE ELECTRICAL PARTS

Change Information

Quick Links

Troubleshooting

Related Manuals for Tektronix 2440

Summary of Contents for Tektronix 2440

Table of Contents