Page 1 S N B 7 0 0 1 0 0 an d A B O V E (2 2 4 6 1Y, 2R ) S N B 1 0 0 1 0 0 an d A B O V E (2 2 4 6 M O D A) Tektronix COMMOTED TO EXCELLENCE...
Page 2 -< ■ SN B100100 and ABOVE (2246 MOD A) The 2246 2R Is a rackmount version of the 2246 1Y. This service manual and the 2240F1R Instruction sheet (Tektronix part number 070-6332-00) are required to fully service the 2246 2R oscilloscope.
Page 3 Copyright© 1988 Tektronix, Inc. All 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 issued and pending. are registered TEKTRONIX, TEK, SCOPE-MOBILE, and trademarks of Tektronix, Inc.
Page 4: Table Of Contents
2246 1Y and 2246 Mod A Service TABLE OF CONTENTS Page Page LIST OF ILLUSTRATIONS........vi VERTICAL INPUTS (Diagram 1) ......LIST OF TABLES ............vii OPERATORS SAFETY SU M M A R Y...... viii VERTICAL PREAMPS AND OUTPUT AMPLIFIER SERVICING SAFETY SUMMARY ......
Page 5 2246 IV and 2246 Mod A Service TABLE OF CONTENTS (cont) Page Page VERTICAL ........4-6 A AND B SWEEPS AND DELAY COMPARATORS Input COUPLING Functional (Diagram 5) ........3-31 Check ......... 4-6 HORIZONTAL OUTPUT AMPLIFIER CH 1 and CH 2 VOLTS/DIV (Diagram 6) ........3-37 Trace Shift ........
Page 6 2246 1Y and 2246 Mod A Service TABLE OF CONTENTS (cont) Page Page AC-Coupled Lower -3 dB Delay Time Position Range ........4-21 Point ..........4-13 X-Axis Gain A c c u ra c y ..4-21 Vertical ALT and CHOP M o d e s ..........
Page 7 2246 1Y and 2246 Mod A Service TABLE OF CONTENTS (cont) Page Page CH 3 Step Balance (R141) . . . ADJUSTMENT PROCEDURE Section 5 CH 4 Step Balance (R161) . . . INTRODUCTION .........5-1 CH 1 MF/LF Gain (R13) and PURPOSE ........
Page 8 2246 1Y and 2246 Mod A Service Horizontal X I 0 Gain (Timing) CORRECTIVE MAINTENANCE . . . 6-34 (R825) ......... 5-12 INTRODUCTION......6-34 Readout Horizontal Gain (R823) MAINTENANCE and MAG Registration (R809) . 5-12 PRECAUTIONS......6-34 A 0.5 p.s Timing (C314) ..5-13 OBTAINING REPLACEMENT B 0.5 |xs Timing (C329) ..
Page 9: List Of Illustrations
Simplified 2246 1Y and 2246 Mod A 2 - 1 Optional power cords .......2-1 block diagram 9-5a Detailed 2246 1Y or 2246 Mod A block 3 - 1 Display Sequencer 1C (SLIC, U600) diagram—part 1 pin-out d ia g ra m ........3-16...
Page 10 2246 1Y and 2246 Mod A Service LIST OF TABLES Table Page Page Electrical C h a racte ristics......1-3 3-25 Front-Panel Multiplexer Channel Select B its ..........3-41 Environmental C haracteristics....1-15 3-26 Measurement Processor Signals ..
Page 11: Operators Safety Summary
2246 1Y and 2246 Mod A Service OPERATORS SAFETY SUMMARY The safety information in this summary is for operating personnel. Warnings and cautions will also be found throughout the manual where they apply. Grounding the Product Terms in this Manual CAUTION statements identify conditions or practices This product is grounded through the grounding con...
Page 12: Servicing Safety Summary
2246 1Y and 2246 Mod A Service SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Refer also to the preceding Operators Safety Summary Disconnect power before removing protective Do Not Service Alone panels, soldering, or replacing components. Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present.
Page 13 2246A Service 7062-01 The 2246 1Y or 2246 Mod A Portable Oscilloscope...
Page 14: Specification
Section 1 - 2 2 4 6 1Y and 2 2 4 6 M od A Service SPECIFICATION INTRODUCTION STANDARD ACCESSORIES The following items are standard accessories shipped The 2246 1Y and 2246 Mod A are 100 MHz, fou r- channel, dual-sweep, portable oscilloscopes for with the 2246 1Y and 2246 Mod A instrument: general-purpose use.
Page 15: Performance Conditions
Specification—2246 1Y and 2246 Mod A Service that define the measurement capabilities of the PERFORMANCE CONDITIONS instrument. The electrical characteristics given in Table 1-1 are valid when the instrument has been adjusted at an Environmental characteristics given ambient temperature between +20°C and +30°C, Table 1-2.
Page 16: Electrical Characteristics
Specification—2246 1Y and 2246 Mod A Service Table 1-1 Electrical Characteristics Characteristics Perform ance Requirements VERTICAL DEFLECTION SYSTEM - CH 1 AND CH 2 Deflection Factor Range 2 mV/div to 5 V/div in 1 -2 -5 sequence? Accuracy (includes ADD MODE and CH 2 INVERT) Within ±2%.
Page 17 Specification—2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements Delay Match (CH 1 to CH 2) Less than 400 ps difference. At least 25:1 up to 10 MHz and at least 10:1 up to 100 MHz...
Page 18 Specification—2246 IV and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements VERTICAL DEFLECTION SYSTEM - CH 3 AND CH 4 Deflection Factor 0.1 V per division and 0.5 V per division.3 Range Accuracy 15°C to 3 5 ° C Within ±...
Page 19 Specification—2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements VERTICAL DEFLECTION SYSTEM - ALL CHANNELS Bandwidth Limit 20 MHz ±25%. (-3 dB bandwidth) Low Frequency Linearity (Relative to center screen) Within ±5%. Linearity is measured by positioning a two-division test signal anywhere on screen and noting the amplitude change.
Page 20 Specification—2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements Sweep Linearity ± 5%. Sweep Linearity applies over the center eight divisions of an unmagnified sweep. Excludes the first 1/4 division or 25 ns from the start of the sweep.
Page 21 Specification—2246 IV and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements A AND B TRIGGER Sensitivity—CH 1 through CH 4: AUTO LEVEL, NORM AND SINGLE SEQUENCE Trigger sensitivity is defined as the minimum peak-to-peak sine-wave trigger signal amplitude required to show the test signal with horizontal jitter of less than 3.0% of one period (p -p viewed over two seconds).
Page 22 Specification—2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements ± (0.3% of reading + 10% of one vertical division). TRIGGER LEVEL READOUT Accuracy HOLDOFF Control Range Increases A Sweep holdoff time by at least a factor of 2 .a...
Page 23 Specification —2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements PK-PK VOLTS Accuracy—Full Bandwidth ±(2.0% of reading + 15% of one vertical division + 1.5 mV). 25 Hz to 25 MHz Greater Than 25 MHz to 100 MHz + 0.5 dB/-3 dB ±1.5 mV.
Page 24 Specification—2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Performance Requirements PHASE — H (manually positioned cursors) Accuracy Readout calculated from l<- SEC — H cursor positions. TRACK MEASUREMENT Position Accuracy (Cursor Within ± 0.05 vertical division.
Page 25 Specification—2246 1Y and 2246 Mod A Service Table 1-1 (cont) Electrical Characteristics Characteristics Perform ance Requirements X -Y OPERATION Deflection Factors Same as Vertical deflection system with the VOLTS/DIV variable controls in calibrated detent position.3 Accuracy Y Axis 15°C to 35°C Within ±...
Page 26 Electrical Characteristics Performance Requirements Characteristics FRONT PANEL SETUP MEMORY Battery Type 2246 1Y, 2R Two 1.5 V, 43 mAH, silver-oxide button cells in series.3 SN B700100-B714999 SN B715000 and above One, dry, 3.0 V, Lithium.® One, dry, 3.0 V, Lithium.®...
Page 27: Maximum Input Voltage Vs Frequency
Specification—2246 1Y and 2246 Mod A Service 10 kHz 50 kHz 100 kHz 500 kHz 1 MHz 100 MHz FREQUENCY 6555-21 Figure 1-1. Maximum input voltage vs frequency derating curve for the CH 1, CH 2, CH 3, or CH 4 input connectors.
Page 28 Specification—2246 1Y and 2246 Mod A Service Table 1-2 Environmental Characteristics Characteristics Description STANDARD INSTRUMENT Environmental Requirements Instrument meets or exceeds the environmental requirements of MIL-T-28800D for Type III, Class 3, Style D equipment, as described below.3 Temperature Operating -10°C to +55°C (+14°F to +131 °F ).
Page 29 Specification—2246 1Y and 2246 Mod A Service Table 1-2 (cont) Environmental Characteristics Description Characteristics Meets the following requirements in accordance with MIL-T-28800D and M1L-STD-461C. CE 0 1 :Part 2, narrow band requirements up to 15 kHz. CE 03: Part 4.
Page 30: Mechanical Characteristics
Specification—2246 1Y and 2246 Mod A Service Table 1-3 Mechanical Characteristics Description Characteristics STANDARD INSTRUMENT Weight With Front Cover, Accessories, 8.9 kg (19.6 lb). and Accessories Pouch (without manual) With Power Cord 7.9 kg (17.4 lb). Shipping Weight (Domestic) 11.7 kg (25.8 lb).
Page 31 Specification—2246 1Y and 2246 Mod A Service Table 1-3 (cont) Mechanical Characteristics Description Characteristics RACKMOUNT INSTRUMENT Weight With Power Cord 10.0 kg (22.0 lb). Shipping Weight Domestic, includes manual 14.2 kg (31.3 lb). See Figure 1-3, Dimensional drawing. Overall Dimensions...
Page 32 S pecification—2246 1Y and 2246 Mod A Service Table 1-3 (cont) Mechanical Characteristics Description Characteristics Required Clearance dimensions Height > 1 7 8 mm (7 in ). Width > 4 4 8 mm (17-5/8 in). Depth > 5 0 8 mm (20 in ).
Page 33: Dimensional Outline Drawing, Standard Cabinet
Specification—2246 1Y and 2246 Mod A Service 6083-02 Figure 1-2. Dimensional outline drawing, standard cabinet. 1-20...
Page 34: Dimensional Outline Drawing
Specification—2246 1Y and 2246 Mod A Service 2.0 in 51 mm C L E A R A N C E R E C O M M E N D E D AT R E A R AND TOP VIEW S I D E S FOR 17.7 in...
Page 36: Preparation For Use
S td . 120V IEC 83 UL 198.6 This section tells how to prepare tor and to proceed with the initial start-up of the TEKTRONIX 2246 1Y or 2246 Mod A Oscilloscope. CEE (7), EURO II, IV, VII 2 20 V...
Page 37: Instrument Cooling
Trigger To verify the proper value of the power-input fuse MODE LEDs may be flashing to indicate the circuit for the 2246 1Y or 2246 Mod A, use the following location of a start-up error. Also, under certain procedure.
Page 38: Theory Of Operation
This section contains general and detailed descrip a system where the more positive of two levels is tions of the 2246 1Y and 2246 Mod A Oscilloscope the TRUE (or 1) state; the more negative level is the circuitry. The Block Diagram Description describes FALSE (or 0) state.
Page 39: Vertical Preamps And Output Amplifier
Amplifier where it gets its final boost in power to The Measurement Processor controls the operation drive the vertical crt deflection plates. of much of the switchable circuitry of the 2246 1Y and 2246 Mod A via a common shift register data An auxiliary Vertical Comparator circuit (U702 and line (SR DATA).
Page 40: Display And Trigger Logic And Processor Interface
Theory of Operation—2246 1Y and 2246 Mod A Service from the measurement channel signal. That dc level When the trigger signal level crosses the com is then applied to the B Trigger Level Comparator parator threshold set by the Trigger LEVEL and where its value is determined by successive approxi...
Page 41: A And B Sweeps And Delay Comparators (Diagram 5)
Theory of Operation—2246 1Y and 2246 Mod A Service (decreases horizontal gain), and the horizontal A AND B SWEEPS AND DELAY position signal for positioning the display. The X-Y COMPARATORS (Diagram 5) signal controlling U301B reduces the range of the Horizontal POSITION signal delivered to the Hori...
Page 42: Measurement Processor (Diagram 8)
Theory of Operation—2246 1Y and 2246 Mod A Service or probe code to determine if a change has operating modes; all circuit operating functions that occurred and, if so, the amount and direction of the either change with front panel settings only or at a change.
Page 43: Switch Board And Interface (Diagram 10)
Measurement The low and high voltages required to power the Processor to check if one is being pressed. When a 2246 1Y and 2246 Mod A are produced by a high- switch closure detected, Measurement efficiency, switching power supply.
Page 44: Shift Register 0 Bit Assignment
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-1 Shift Register 0 Bit Assignment Signal Controls U171 CH 1 GND K101— CH 1 GND Coupling (last bit) CH 1 AC K100-CH 1 AC Coupling CH 1 X10 1 K102—CH 1 X I 0 Attenuator 1...
Page 45: Amplifier (Diagram 2 )
Theory of Operation—2246 1Y and 2246 Mod A Service low-impedance attenuator at the output of the Table 3-2 amplifier. The switchable low-impedance, voltage Input Coupling Control Bit States divider network of U112 provides 1, 2, and 5 times attenuation of the output signal for application to the...
Page 46: Ch 1 And Ch 2 Attenuator And Gain Control Bit States
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-3 CH 1 and CH 2 Attenuator and Gain Control Bit States CH 1 PREAMP 0 CH 1 X I 0 2 CH 1 XI CH 1 X5 CH 1 PREAMP 1...
Page 47: Ch 3 And Ch 4 Gain Control Bit
Theory of Operation—2246 1Y and 2246 Mod A Service The no-signal dc output voltage from Q252 is Table 3-5 +7.5 V, and the standing current is about 15 mA. CH 3 and CH 4 Gain Control Bit The differential voltage between the positive and...
Page 48 Theory of Operation—2246 1Y and 2246 Mod A Service more. The higher value of R206 on pin 13 of U201 POSITION VOLTAGE SWITCHES. Selection of the channel or readout position signals to be supplied to reduces the TRACE SEP range to ±4 divisions as the paraphase amplifier summing node is controlled compared to ±12 divisions for the vertical signals.
Page 49: A And B Trigger System (Diagram 3)
Theory of Operation—2246 1Y and 2246 Mod A Service Manual calibration of the vertical signal display to the A AND B TRIGGER SYSTEM (Diagram 3) crt graticule is done using VO Gain potentiometer R703. The components between pins 12 and 22 of...
Page 50: Trigger Selection Logic
Theory of Operation—2246 1Y and 2246 Mod A Service trigger the oscilloscope for Television signal display hysteresis is increased so that a larger signal change is required to produce a state change at the (see TV Trigger Detector description). Selection output of the comparators.
Page 51 Theory of Operation—2246 1Y and 2246 Mod A Service MEASUREMENT SIGNAL LOW-PASS FILTER. The is set using the front panel Trigger LEVEL control. A fixed amount of hysteresis in the A Trigger Level average dc level of a signal is obtained for measure...
Page 52: (Diagram 4)
Theory of Operation—2246 1Y and 2246 Mod A Service B TV TRIG EN: Switches between the B TV Trigger selects the correct sync polarity for the applied sig nal, the middle of the sync tips is at the threshold signal and the DC measurement signal voltage level of the comparator.
Page 53: Display Sequencer 1C (Slic, U600)
Theory of Operation—2246 1Y and 2246 Mod A Service The readout interface circuit responds to the cannot move the voltage on U1102B pin 5 across the readout request and readout blanking inputs, and comparison threshold (ground on pin 6). generates a blanking signal (BLANK, pin 18) to...
Page 54 Theory of Operation—2246 1Y and 2246 Mod A Service DIO: Data 10 pin. This pin is tied to the LFC: Low-frequency clock input. A signal derived from the calibrator circuit is used for Measurement Processor MB DATA line. Data skewing the chop-clock phase.
Page 55: Display Sequencer (U600) Control Bit Assignments
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-7 Display Sequencer (U600) Control Bit Assignments Action when WR Strobed DIO when RD LO DIO clocked into Control Reg. (a) Control Reg. msb RAM comparator RAM written from Control Reg.
Page 56: A Trigger Source Select Bits
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-9 ATS 2, ATS 1, ATS 0: A Trigger Source Select outputs. These bits either correspond Horizontal Display Mode Select Bits to three bits of the control register, or they track with the vertical channel enable out...
Page 57: Shift Register 1 Control Bit Data
Theory of Operation—2246 1Y and 2246 Mod A Service inhibited). Lastly, this output may be forced Table 3-10 high Measurement Processor Shift Register 1 Control Bit Data interface. Bit Nr Control Signal Name(s) T E S T : Test mode enable input (active low).
Page 58: Trigger Source Select
Theory of Operation—2246 1Y and 2246 Mod A Service B2S2, B2S1, B2S0: B2 Trigger SOURCE mode is enabled, the force B1/B2 feature is disabled, and THO is strobed once (or RESET select bits. Encoded the same as A Trigger is strobed once while THO is high). At this...
Page 59: Holdoff Counter Encoding
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-14 Holdoff Counter Encoding Count Length Count Length 10000 20000 50000 50000 100000 200000 500000 500000 100000 200000 500000 500000 100000 1000 200000 2000 500000 5000 5000 a Strobing RESET presets the holdoff counter to 499999 to simplify testing.
Page 60: Display Sequencer Channel Select Logic Bits
Theory of Operation—2246 1Y and 2246 Mod A Service In CHOP Vertical Mode, the leading edge of the chop Table 3-15 blanking pulses advance the vertical display enable Display Sequencer Channel Select Logic Bits outputs. RAM bits RD5, RD4, and RD3 still determine...
Page 61: Horizontal And Vertical Display Response
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-16 Horizontal and Vertical Display Response HORIZONTAL CONTROL SIGNAL OUTPUTS Delay Readout Inactive (ROR = 1 ) Vertical Signal Horizontal Modes (HM1 HMO) Readout Modes Active Names A Only A Alt B...
Page 62: Readout Interface Relative
T h eo ry of O p eratio n —2246 1Y and 2246 M od A Service NOTES (c o n t): (g) NSSS = The number of states programmed into the vertical sequencer. (h) Programmable with the vertical sequencer.
Page 63: Trigger Logic 1C (Flic, U602)
Theory of Operation—2246 1Y and 2246 Mod A Service Trigger Logic 1C (FLIC) V ee S I N The Trigger Logic 1C or FLIC (fast-logic integrated circuit, U602 Diagram 4) does most of the fast logic B L A N K functions required to run the oscilloscope.
Page 64 Theory of Operation—2246 1Y and 2246 Mod A Service B GATE: B Sweep gate output. Starts the B DLY2: Input from second delay comparator. Sweep ramp. Active high. This comparator normally switches from low to high after the end of the second sweep delay (in dual-delay mode).
Page 65: Control Register Signal-Bit Names
Theory of Operation—2246 1Y and 2246 Mod A Service ARUN: This bit determines whether the A Table 3-18 Sweep is in the free-run mode or in the trig Control Register Signal-bit Names gered mode. ARUN=1 selects the free-run mode. Name A Sweep Logic When ARUN is high, the A Sweep logic works as fol...
Page 66 Theory of Operation—2246 1Y and 2246 Mod A Service can be read at the TDO pin with A1 and A0 set this all. When DM1 and DM0 = 10, the B Sweep won’t be way. The Measurement Processor reads the state of...
Page 67: Z-Axis Switching Logic
ECL range of and Q605). The output signal is taken across R612 in about 0.6 V. All the ECL logic devices in the 2246 1Y the emitter of Q604. The emitter of Q605 is con...
Page 68: A And B Sweeps And Delay Comparators (Diagram 5)
Theory of Operation—2246 1Y and 2246 Mod A Service Display Logic Clock voltage divider formed by resistor pack R313. The voltages at the taps of the voltage divider set the for ward bias on the charging-current pass transistor, The Display Logic clock signal at 10 MHz is generated Q307, via operational amplifier U304.
Page 69 Theory of Operation—2246 1Y and 2246 Mod A Service + 15 V 6081-07 Figure 3-4. S im plified Sweep Circuit. 3-32...
Page 70 Theory of Operation—2246 1Y and 2246 Mod A Service The selectable sweep timing capacitors come in a baseline, run-up, and retrace (see Figure 3-5). matched set of three capacitors, two for the A Sweep start length sweep run-up Sweep timing (C307A and C307B) and one for the B controlled by the A GATE and A GATE signals from Sweep timing (C307C).
Page 71: A Sweep Timing Selections
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-22 A Sweep Tim ing Selections SPEED Min H.O. C timing 1 timing 2.0 jxs 20 ns 2 mA C314/C315 50 ns 800 jxA 2.0 jxs 2.0 jxs 100 ns...
Page 72: B Sweep Timing Selections
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-23 B Sweep Timing Selections SPEED tim in g C tim in g 20 ns 2 mA C329/C330 50 ns 800 |xA 100 ns 400 ixA 100 ms 200 jxA...
Page 73: A Sweep Start Circuit Waveforms
Theory of Operation—2246 1Y and 2246 Mod A Service 6081-08 Figure 3-5. A Sweep Start circuit waveforms. are done. The Trigger Logic 1C then switches the A and B Sweep Buffers states of the A GATE or the B GATE signal (as...
Page 74: Horizontal Output Amplifier (Diagram 6)
Theory of Operation—2246 1Y and 2246 Mod A Service ramp at pin 9 crosses the second (delta) delay level signal source is the CH 1 trigger signal from applied to pin 6. At that point, the DLY END 1 signal U421A (Diagram 3).
Page 75: Z-Axis, Crt, Probe Adjust, And Control Mux (Diagram 7)
Theory of Operation—2246 1Y and 2246 Mod A Service As the gate voltage of Q802 increases to follow the Driver Amplifiers input ramp signal, the drain voltage goes negative from about 87 V toward the 15 V source voltage. At...
Page 76 Theory of Operation—2246 1Y and 2246 Mod A Service the Z-Axis and the Auto Focus Amplifier outputs to Base biasing for Q2701 is provided by R2715 and the crt grids. Direct coupling of the Z-Axis and Auto R2716 in series between ground and the +130 V Focus signals to the crt control grid is not employed supply.
Page 77: Simplified Diagram Of The Dc Restorer Circuitry
Theory of Operation—2246 1Y and 2246 Mod A Service +66--- -2700 C2711 + 16 TO CRT GRID 6081-09 Figure 3-6. Simplified diagram of the DC Restorer circuitry. held constant by the long tim e-constant discharge The charge held by C2711 sets the control-grid bias path of C2711 through R2724.
Page 78: Front-Panel Multiplexer Channel Select Bits
T h eo ry of O p eratio n —2246 1Y and 2246 M od A Service then follows the Z-Axis output-voltage level to set 11) where it is digitized and sent to the Measure- the new bias voltage for the crt control grid.
Page 79: Measurement Processor (Diagram 8)
Theory of Operation—2246 1Y and 2246 Mod A Service and transceivers, the Address Decoding circuitry, Operational amplifier U930B a free-running and the Power-On Reset 1C (U2502). oscillator circuit with a period of about 1 ms. The oscillator frequency is determined mainly by the charging time constant of C935 and R935.
Page 80: Measurement Processor Signals
Theory of Operation—2246 1Y and 2246 Mod A Service When these measurements are running, a new selects a pot to be scanned by connecting it digital value is displayed, cursor or to Comparator U2306 in the d -to -a circuitry.
Page 81 Theory of Operation—2246 1Y and 2246 Mod A Service enabling occurs when pin 39 (DEN) goes low while Data Buffers pin 38 (MCSO) is high. BUS 0 BIDIRECTIONAL BUFFER. Buffer U2515 communicates the serial bit data to and from the BUS ARBITRATION GATES.
Page 82: Readout System (Diagram 9)
Theory of Operation—2246 1Y and 2246 Mod A Service Address Latches the battery circuitry should be checked and the bat tery replaced if necessary. Also, the SELF CAL routine should be run again after the instrument is MULTIPLEXED AD BUS ADDRESS LATCH. Since the...
Page 83 Theory of Operation—2246 1Y and 2246 Mod A Service Each refreshed dot or character is refreshed with 1. The Readout Processor waits until RO INTR is the appropriate display position attributes. asserted (the Measurement Processor is attributes define the characters or dots as: ready to receive).
Page 84 Theory of Operation—2246 1Y and 2246 Mod A Service READOUT DOT. A Readout dot is refreshed in this 6. Given the row and column containing the way: character, and the vertical and horizontal position of the dot, U2412 generates the vertical analog current for the dot, and U2413 1.
Page 85: Display Addresses
Theory of Operation—2246 1Y and 2246 Mod A Service address lines defines either text (menus, measure character is finished and the next character can be ment readouts, error messages), vertical started. cursors, or horizontal cursors. Each field has space for up to 255 characters, and each field is super...
Page 86: Position Enable Bit Assignment
Table 3-28). the display. When positionable text is displayed (such as time cursors), the cursor position signal is The 2246 1Y and 2246 Mod A Readout Output Mixer mixed with horizontal output signal.
Page 87: Character Pixel Arrangement
Theory of Operation—2246 1Y and 2246 Mod A Service Table 3-28 Field and Mixer A ttribute Bit Assignm ent MIX3 MIX2 MIX1 MIXO FLD2 FLD1 FLDO Value Field number (0,1, or 2) Route Horiz DAC to Horiz Ampl Route CursorO to Horiz Amplifier...
Page 88: Switch Board And Interface (Diagram 10)
Theory of Operation—2246 1Y and 2246 Mod A Service closed) of the connected column of switches is read. The voltage at U2416 pin 14 depends on two things: All six columns of LEDs and the six columns of the current from U2414 pin 13, and the voltage at switches are completely refreshed and checked U2414 pin 3.
Page 89: Adc And Dac System (Diagram 11)
Theory of Operation—2246 1Y and 2246 Mod A Service Pot M ultiplexer Latch Switch Reading Latch U2313 latches data from the data bus (D0-D7) At the same time the ASO LED column is refreshed, to control multiplexers U2308 and U2309 on this the connected ASO switch column is pulled high diagram and U506 on Diagram 7.
Page 90: Power Supply (Diagram 12)
Theory of Operation—2246 1Y and 2246 Mod A Service for changes to the control settings. Those control Both overvoltage and overcurrent protection are voltages are held constant between refreshes by provided to protect the oscilloscope circuitry from sam ple-and-hold circuits formed by a capacitor (to further damage if a circuit component fails.
Page 91: Power Supply Block Diagram
Theory of Operation—2246 1Y and 2246 Mod A Service 6081 6557-99 Figure 3-9. Power Supply block diagram. 3-54...
Page 92 Theory of Operation—2246 1Y and 2246 Mod A Service With U2201 on and drawing current from C2204, the into and out of the summing node balanced. The voltage across C2204 begins fall. actual current through R2206 is the output voltage...
Page 93 Theory of Operation—2246 1Y and 2246 Mod A Service 116 V) across pins 1 and 2 of T2203 and current restart after about half a second, but will shut down begins increasing linearly in that coil, also flowing again if the overvoltage condition continues (this is through Q2201 to the +44 V supply.
Page 94 Theory of Operation—2246 1Y and 2246 Mod A Service line voltage level means a shorter on time of Q2201 T2205. Current rapidly ramps up through the primary is needed to maintain +44 V across C2203. of T2205 and induces a positive feedback base current in one-half of its center-tapped secondary that keeps Q2210 turned on.
Page 95: Main Board Power Distribution (Diagram 13)
Theory of Operation—2246 1Y and 2246 Mod A Service filter. A neon lamp across the second section of the the Inverter power transformer consist of rectifier filter provides protection against arcing if there is a and filter components only. All the regulation is done...
Page 96: Performance Check Procedure
QUIT to return to the normal oscilloscope mode. N O T E To ensure instrument accuracy, check the performance of the 2246 1Y or 2246 Mod A after every 2000 hours of operation, or once each year if used infrequently. If the Performance accuracies are ensured only...
Page 97: Test Equipment Required
Performance Check Procedure —2246 1Y and 2246 Mod A Service Table 4-1 Test Equipment Required Example of Item and Minimum Test Equipment Description Specification TEKTRONIX SG 503 Leveled Sine-Wave Frequency: 250 kHz to Vertical, horizontal, Generator above 150 MHz. Output triggering, measure...
Page 98 Performance Check Procedure—2246 1Y and 2246 Mod A Service Table 4-1 (cont) Example of Minimum Item and Test Equipment Specification Description Signal termination. Tektronix Part Number Termination Impedance: 50 Cl. (2 required) Connectors: BNC. 011-0049-01. Tektronix Part Number 10X Attenuator Ratio: 10X.
Page 99: Index To Performance Check Procedure
Performance Check Procedure—2246 1Y and 2246 Mod A Service 6. Single Sweep Mode ......4-16 INDEX TO PERFORMANCE CHECK 7. Trigger LEVEL Control Range ... 4-16 PROCEDURE 8. TV Field Trigger S ensitivity....4-17 9. TV Line Trigger Sensitivity ....
Page 100: Display
Performance Check Procedure—2246 1Y and 2246 Mod A Service DISPLAY Equipment Required (See Table 4-1) Tim e-m ark generator 50 f l BNC coaxial cable 50 f l BNC termination 1. TRACE ROTATION CHECK—trace rotation control range is adequate to align trace with center graticule line using a small straight-bladed alignment tool.
Page 101: Vertical
Performance Check Procedure—2246 1Y and 2246 Mod A Service VERTICAL Equipment Required (See Table 4-1) 50 f l precision BNC coaxial cable Leveled sine-wave generator 50 O termination Calibration generator Adapter BNC-m ale-to-m iniature probe tip Function generator Dual-input coupler...
Page 102: Ch 3 And Ch 4 Volts/Div Trace Shift
Perform ance Check Procedure—2246 1Y and 2246 Mod A Service Switch CH 2 VOLTS/DIV through all positions 5. CH 1 and CH 2 Input COUPLING Trace Shift from 2 mV to 5 V. Position trace to center graticule line. CHECK—trace shift does not exceed 0.2 division between steps.
Page 103: Low-Frequency Linearity
Performance Check Procedure —2246 1Y and 2246 Mod A Service Set: Move the test signal to the CH 1 input. Set: CH 1 VAR VOLTS/DIV Detent (calibrated) Vertical MODE CH 1 (CH 2 off) Vertical MODE CH 2 (CH 1 off)
Page 104: Add Mode And Ch 2 Invert Deflection Accuracy
Performance Check Procedure—2246 1Y and 2246 Mod A Service Disconnect the test setup from the 2246 1Y or Move the test signal to the CH 4 input. 2246 Mod A. Set Vertical MODE to CH 4 (CH 3 off). Position the trace two graticule lines below the Vertical POSITION Range (all channels) center horizontal graticule line.
Page 105: Ch 1 To Ch 2 Signal Delay Match
Performance Check Procedure—2246 1Y and 2246 Mod A Service Set: Set X I 0 MAG On (for 2 ns/div sweep speed). Vertical MODE CH 3 (CH 2 off) CHECK—that the leading edges of the two waveforms have less than 0.2 horizontal division...
Page 106: Ch 3 And Ch 4 Vertical Bandwidth
Performance Check Procedure—2246 1Y and 2246 Mod A Service Set the Leveled Sine-Wave Generator output for 18. CH 1 and CH 2 Aberrations a six-division signal amplitude at 50 kHz. a. Set: d. Set generator Frequency Range CH 1 (CH 4 off)
Page 107: Common-Mode Rejection Ratio
Performance Check Procedure—2246 1Y and 2246 Mod A Service 21. Channel Isolation 20. Common-mode Rejection Ratio Set: Connect leveled sine-wave generator (SG 503) output to the CH 1 and CH 2 input connectors via Vertical MODE CH 1 and CH 2...
Page 108: Ac-Coupled Lower -3 Db Point
Performance Check Procedure—2246 1Y and 2246 Mod A Service Position all traces for two divisions of separation CHECK—display amplitude is 0.1 division or less, excluding trace width, on the CH 1, CH 2, and with the CH 1 trace near the top; then in order down the graticule area with the CH 4 trace near CH 3 traces.
Page 109: S E N S Itiv Ity
Performance Check Procedure—2246 IV and 2246 Mod A Service TRIGGERING Equipment Required (See Table 4-1) Function generator Leveled sine-wave generator 10X BNC attenuator 50 O BNC coaxial cable 2X BNC attenuator 50 O BNC termination TV signal generator Dual-input coupler NOTE 1.
Page 110: S E N S Itiv Ity
Performance Check Procedure—2246 1Y and 2246 Mod A Service Set: 2. 500 kHz Trigger Sensitivity Trigger CPLG Set: Horizontal MODE B Trigger A/B SELECT SCOPE BW B SEC/DIV 20 ns Horizontal MODE A/B SELECT A Trigger CHECK—that using the Trigger LEVEL control the...
Page 111: Trigger Sensitivity
Performance Check Procedure —2246 1Y and 2246 Mod A Service e. Set: Move test signal from CH 1 to the CH 2 input. A Trigger MODE NORM h. Set leveled sine-wave generator output to pro CH 1 Input COUPLING duce a 1.0 division display amplitude at 100 MHz.
Page 112: Tv Field Trigger Sensitivity
Performance Check Procedure—2246 1Y and 2246 Mod A Service 8. TV Field Trigger Sensitivity Set: Set: CH 2 INVERT Trigger SLOPE ~\_ (negative) CH 2 (CH 1 off) Vertical MODE CH 2 VOLTS/DIV CHECK—that a stable display is obtained. 0.2 ms...
Page 113: Horizontal
Performance Check Procedure—2246 1Y and 2246 Mod A Service HORIZONTAL Equipment Required (See Table 4-1) Tim e-m ark generator 50 £1 BNC coaxial cable 50 Q BNC termination Set: 1. A and B Sweep Length Horizontal MODE B SEC/DIV 1 ms a.
Page 114: Magnifier Registration
Performance Check Procedure—2246 1Y and 2246 Mod A Service 4. Magnifier Registration 6. A and B Magnified Timing Accuracy Set X I 0 MAG on. Set tim e-m ark generator for 5 ns time marks. Position the rising edge of a time marker to the center vertical graticule line.
Page 115: Delay Time Jitter
Performance Check Procedure—2246 1Y and 2246 Mod A Service Table 4-3 Settings for Timing Accuracy Checks SEC/DIV Setting Tim e-M ark Setting Normal Normal X I 0 MAG X I 0 MAG 20 ns 2 ns 20 ns 5 ns...
Page 116: Delay Time Accuracy
Performance Check Procedure—2246 1Y and 2246 Mod A Service Position the intensified dot to the leading edge of Table 4-4 the 10th time marker to display the rising edge on Delay Time Accuracy the B Trace (using the k- OR DELAY control).
Page 117: Y Phase Difference
Performance Check Procedure—2246 1Y and 2246 Mod A Service Position dot to graticule center. Connect calibration generator STD AMPL output to the CH 1 input via a 5 0 -0 precision BNC coax Set CH 1 Input COUPLING to DC.
Page 118: Time And Cursors Measurements
Performance Check Procedure—2246 1Y and 2246 Mod A Service TIME AND CURSORS MEASUREMENTS Equipment Required (See Table 4-1) Time mark generator Calibration generator 5 0 0 BNC coaxial cable 50 0 BNC termination 1.K-SEC-*! and k- 1/SEC-H Cursor Accuracy CHECK—that readout 7.940 ms...
Page 119: K- Phase -H Cursor A C C U Ra C Y
Performance Check Procedure—2246 1Y and 2246 Mod A Service 3. k- PHASE-* Cursor Accuracy CHECK—that the readout is between 0.495 V and 0.505 V. Set generator for 1 ms time marks. 5. fh VOLTS'* Cursor Accuracy Set: Select MEASUREMENTS CURSORS menu, then Horizontal MODE select rb VOLTS-* CURSORS.
Page 120: Ch1/Ch2 Voltmeter Measurements
Performance Check Procedure—2246 1Y and 2246 Mod A Service CH1/CH2 VOLTMETER MEASUREMENTS Equipment Required (See Table 4-1) Calibration generator 50 O BNC coaxial cable 50 O BNC termination Leveled sine-wave generator Function generator Set calibration generator for Std Ampl output of 1.
Page 121: Peak, -Peak, Peak-To-Peak Volts Accuracy
Performance Check Procedure—2246 1Y and 2246 Mod A Service 4. 25 MHz +Peak, - Peak, and Peak-to-Peak Volts 3. +Peak, -Peak, Peak-to-Peak Volts Accuracy Accuracy a. Set: Connect leveled sine-wave generator (SG 503) CH 2 (CH 1 off) output to the CH 2 input via a 50-.Q BNC coaxial Vertical MODE cable and a 50-.Q BNC termination.
Page 122 Performance Check Procedure—2246 1Y and 2246 Mod A Service Connect calibration generator (PG 506) Std Set the intensified dot to a positive peak of the Ampl output to the CH 2 input via a 5 0 -n displayed waveform. precision BNC coaxial cable. Set the generator to Std Ampl output, 50 mV.
Page 123: External Z-Axis, Probe Adjust And Front-Panel Setup Functions
CH 2 INVERT SCOPE BW Connect a 10X probe to the CH 1 input con CH 1 Input COUPLING nector and connect the probe tip to the 2246 1Y Horizontal MODE or 2246 Mod A PROBE ADJUST output. (When A SEC/DIV 0.5 ms...
Page 124: Adjustment Procedure
S ection 5 - 2 2 4 6 1Y and 2 2 4 6 M O D A Service ADJUSTMENT PROCEDURE INTRODUCTION IM P O R TA N T -P LE A S E READ BEFORE USING THIS PROCEDURE PURPOSE and +30°C, and the instrument must have had a This Adjustment Procedure returns the instrument to warm -up period of at least 20 minutes.
Page 125: Adjustment Interactions
Adjustment Procedure—2246 1Y and 2246 Mod A Service Table 5-1 Adjustment Interactions ADJUSTMENTS OR ADJUSTMENTS AFFECTED REPLACEMENTS MADE ” < < f— P s J < (1 ) < = > < < < + 7 .5 V ADJUST 22 2 GRID BIAS Y<...
Page 126: Preparation For Adjustment
A djustm ent Procedure—2246 1Y and 2246 Mod A Service Specific interactions are called out within certain 2. CH 1 Step Balance (R12) ....adjustment steps to indicate that the adjustments 3. CH 2 Step Balance (R22) ......must be repeated until no further improvement is 4.
Page 127: Power Supply, Display, And Z-Axis
Adjustment Procedure—2246 1Y and 2246 Mod A Service POWER SUPPLY, DISPLAY, AND Z-AXIS Equipment Required (See Table 4-1): 50 n Coaxial Cable Digital Multimeter (DMM) 50 f l Termination Leveled Sine— Wave Generator Test Oscilloscope w/lO X Probe See the ADJUSTMENT LOCATIONS section at the back of this manual for locations of test points and adjustments.
Page 128: Grid Bias (R2719)
Adjustm ent Procedure —224 6 1Y and 2 2 4 6 M O D A Service ble and a 50 C BNC termination. Set for a 5-division Table 5 - 2 display at 50 kHz. Pow er Supply Voltage Limits ADJUST-ASTIG (R2788) together with front-panel FOCUS control for best overall resolution of the Nominal...
Page 129: Readout Jitter (R724)
Adjustment Procedure—2246 1Y and 2246 Mod A Service Connect calibration generator (PG 506) STD 7. Readout Jitter (R724) AMPL output to CH 1 input via 50 H Precision coaxial cable. Set generator for STD AMPL and 1 Set: volt. READOUT (intensity) 12 o ’clock...
Page 130: Vertical
Adjustment Procedure—2246 1Y and 2246 Mod A Service VERTICAL Equipment Required (See Table 4-1): 50 f l Termination Calibration Generator (PG506) Precision Normalizer (20 pF) Leveled Sine-Wave Generator 50 H Coaxial Cable ADJUSTMENT LOCATIONS th e s e c tio n a t th e b a c k o f th is m a n u a l fo r lo c a tio n s o f te s t p o in t s a n d a d ju s tm e n t s .
Page 131: Ch 2 Step Balance (R22)
Adjustment Procedure —2246 1Y and 2246 MOD A Service Add precision normalizer between termination and CH 2 Step Balance (R 22) CH 1 input connector. Set calibration generator Pe riod to 1 kHz and adjust Pulse Amplitude for 5-divi Set: sion display.
Page 132: Ch 2 Input Capacitance (Cl 24)
A djustm ent P ro c e d u re - 2 2 4 6 1Y and 224 6 M O D A Service ADJUST- CH 2 GAIN (R221) for exactly a 5-division Set calibration generator for HIGH AMPL. Set Period display amplitude.
Page 133: Delay-Line Hf Compensation (R272, R273, R275, C274, C273)
Adjustment Procedure—2246 1Y and 2246 Mod A Service Set calibration generator for STD AMPL. Set amplitude to 2 V. Remove 50 f I termination. ADJUST—CH 4 GAIN (R241) exactly a 4-division display amplitude. Disconnect calibration generator from CH 4. e. CHECK-MEASUREMENT BANDWIDTH and SELF CHARACTERIZATION procedure and adjust as necessary.
Page 134: Ch 3 And Ch 4 Bandwidth Check
Adjustment Procedure—2246 1Y and 2246 Mod A Service Repeat the complete bandwidth check pro Set leveled sine-wave generator output for a cedure for Channel 2. six-division signal amplitude at 50 kHz. CHECK—the displayed signal amplitude is at 24. CH 3 and CH 4 Bandwidth Check least 4.2 divisions as the generator frequency is...
Page 135: Horizontal
A djustm ent Procedure —224 6 1Y and 224 6 M O D A Service HORIZONTAL Equipm ent Required (S ee Table 4 -1 ): 50 G Coaxial Cable Time-Mark Generator Calibration Generator 50 n Termination See the section A D JU S T M E N T LO C A TIO N S at the back of this manual for locations of test points and adjustments.
Page 136: A 0.5 P.s Timing (C314)
Adjustm ent Procedure —224 6 1Y and 2 2 4 6 M O D A Service Set: 6. 2 - 5 ns Timing (C 8 0 7 , C 81 4) Set: X I0 MAG SEC/DIV 50 )j.s Horizontal MODE A INTEN CCW (Off) SEC/DIV...
Page 137: Measurement Bandwidth And Self Characterization
Adjustment Procedure—2246 1Y and 2246 Mod A Service MEASUREMENT BANDWIDTH AND SELF CHARACTERIZATION Equipment Required (See Table 4-1): Digital Multimeter (DMM) 50 f l Coaxial Cable Leveled Sine— Wave Generator See the ADJUSTMENT LOCATIONS section at the back of this manual for locations of test points and adjustments.
Page 138 Adjustment Procedure—2246 1Y and 2246 Mod A Service SELF CAL MEASUREMENTS. Press RUN to start SETTINGS MENU. Press SELECT, then press the down-arrow button to select MAKE FACTORY the routine. When the routine is done, continue SETTINGS. Press RUN to start the routine. When with part b.
Page 140: Maintenance
Section 6—2246 1Y and 2246 Mod A Service MAINTENANCE Com ponents.” Routine cleaning instructions and This section of the manual contains information for conducting preventive maintenance, trouble visual inspection checking for defects are covered in “ Preventive Maintenance." Internal testing capa...
Page 141: Preventive Maintenance
V T J INSPECTION AND CLEANING Do not allow moisture to get inside the instru ment during external cleaning. Use only Visually inspect and clean the 2246 1Y or 2246 enough liquid dampen cloth Mod A as often as operating conditions require.
Page 142: External Inspection Checklist
Maintenance—2246 1Y and 2246 Mod A Service Table 6-2 External Inspection Checklist Repair Action Item Inspect For Cracks, scratches, deformations, Touch up paint scratches and Cabinet, Front Panel, and damaged hardware or gaskets. replace defective components. Cover Missing, damaged, or loose knobs,...
Page 143: Lubrication
Maintenance—2246 1Y and 2246 Mod A Service SWITCH CONTACTS. Switch contacts are perma INSPECTION. Inspect the internal portions of the 2246 1Y or 2246 Mod A for damage and wear, using nently treated when assembled. Neither cleaning nor Table 6-3 as a guide.
Page 144: Troubleshooting
Maintenance—2246 1Y and 2246 Mod A Service TROUBLESHOOTING shown on each diagram. Waveform illustrations are INTRODUCTION located adjacent to their respective schematic diagram. Preventive maintenance performed on a regular basis should reveal most potential problems before Circuit Board Illustrations instrument malfunctions.
Page 145: Troubleshooting Equipment
Maintenance—2246 1Y and 2246 Mod A Service components on the circuit board, the table also lists Semiconductor Lead Configurations the grid coordinates of each component in the Figure 9-2 in the Diagrams section shows the lead circuit board illustration. configurations for semiconductor devices used in the instrument.
Page 146 4. Check Associated Equipment W A R N IN G Before proceeding, ensure that any equipment used with the 2246 1Y or 2246 Mod A is operating cor rectly. Verify that input signals are properly con For safety reasons, an isolation transformer...
Page 147: Power Supply Voltage And Ripple Limits
Maintenance—2246 1Y and 2246 Mod A Service NOTE 10. Check Voltages and Waveforms Often the defective component can be located by Use 20 MHz bandwidth limiting on the test checking circuit voltages or waveforms. Typical oscilloscope. A higher bandwidth may pro...
Page 148 Maintenance—2246 1Y and 2246 Mod A Service 11. Check Individual Components a sensitive voltmeter across the junction rather than comparing two voltages taken with respect to ground. If the former method is used, both leads of the voltmeter must be isolated from ground.
Page 149: Internal Testing Capabilities
INTERNAL TESTING CAPABILITIES The diagnostics built into the 2246 1Y and 2246 DIODES. A diode can be checked for either an open Mod A permit the technician to test much of the or a shorted condition by measuring the resistance digital circuitry and the digital-to-analog interface.
Page 150: Service Mode
Maintenance—2246 1Y and 2246 Mod A Service ROM diagnostics—failures indicated by flashing the left side of the screen with the name of the AUTO lamp. Tests all of ROM, except for ROM selected sub-menu displayed in the top line. header. Runs proprietary version of CROC test.
Page 151: Service Menu With Diagnose
Maintenance—2246 1Y and 2246 Mod A Service SERVICE MENU/ SERVICE MENU/ DIAGNOSE DIAGNOSE CONFIGURE SELF CAL MEASUREMENTS INTERNAL SETTINGS MENU/ CONFIGURE MAKE FACTORY SETTINGS LOAD STORE/RECALL SETUPS INTERNAL SETTINGS MENU/ ADJUST VERTICAL OUTPUT EXERCISER MENU/ FRONT PANEL MENU/ FRONT PANEL MENU/...
Page 152 RECALL ONLY (IN STORE/RECALL)? This feature is not available on the CONFIGURE (cont) 2246 1Y and 2246 Mod A. However, a selection must be made when step ping through the CONFIGURE menu. KEEP MENU ON WHEN S/R SELECTED. This feature is not available on the 2246 1Y and 2246 Mod A.
Page 153 Maintenance—2246 1Y and 2246 Mod A Service Table 6-5 (cont) SERVICE MENU Selections Action Menu Item EXERCISE LEDS Uses the delay control to check for adjacent-row or adjacent-column shorts in the front panel board and for inoperative LEDs.The exerciser displays the circuit number and illuminates each LED as the control is rotated.
Page 154 Maintenance—2246 1Y and 2246 Mod A Service Table 6-5 (cont) SERVICE MENU Selections Menu Item Action SHOW AUTO Shows the address being executed if a software error occurs that causes RESTARTS execution out of normal memory space. This is for factory use only and is of no use in field servicing of the instrument.
Page 155: Diagnose Routines
Maintenance—2246 1Y and 2246 Mod A Service troubleshooting the instrument. Testing routines and DIAGNOSE Tests troubleshooting information for use in the event of a The complete DIAGNOSE routine may be called up failed test are given in Table 6-6. by the service technician as needed to aid in...
Page 156 Maintenance—2246 1Y and 2246 Mod A Service Table 6-6 (cont) DIAGNOSE ROUTINES Path, devices tested, and troubleshooting actions Error Label REG SR 2 Front Panel Potentiometer Multiplexer data path check. WROTE (hex data written, 1 character). READ (hex data read, 1 character).
Page 157 Maintenance—2246 1Y and 2246 Mod A Service Table 6-6 (cont) DIAGNOSE ROUTINES Path, devices tested, and troubleshooting actions Error Label Switch board data path check. REG SR 3 WROTE (hex data written, 4 characters). READ (hex data read, 4 characters).
Page 158: Troubleshooting Hints By Diagram
Maintenance—2246 1Y and 2246 Mod A Service Table 6-6 (cont) DIAGNOSE ROUTINES Error Label Path, devices tested, and troubleshooting actions Time Base Cal Signal Code 128 AS 8.192 ms 256 AS 4.096 ms 2.048 ms 512 AS 32.768 ms 1.024 ms...
Page 159 Maintenance—2246 1Y and 2246 Mod A Service 3. Check the outputs of the relay driver transistor " arrays (U174 and U175). When a transistor is w a r n i n g blown in one of the arrays, the usual symptom is 8 V on its output.
Page 160 Maintenance—2246 1Y and 2246 Mod A Service 8. The vertical outputs to the crt may be momen front-panel setup condition, such as changing tarily shorted together to check for offsets in the trigger mode, vertical mode, etc. crt. (This should center the vertical trace.) 7.
Page 161: Horizontal Display State Logic
Maintenance-2246 1Y and 2246 Mod A Service f t A A / W V W Table 6-7 £ C A U T I O N A / w w w ^ Horizontal Display State Logic DO NOT short the horizontal output leads Display together or to ground.
Page 162: Measurement Processor I/O Memory M A P
Maintenance—2246 1Y and 2246 Mod A Service Table 6-8 Measurement Processor I/O M em ory Map Address range (A19 - A0) Signal name and Signal 1^-_____ D irto rw description source o x x x x x x x U2501 pin 25...
Page 163 Maintenance—2246 1Y and 2246 Mod A Service Table 6-8 (cont) Measurement Processor I/O M em ory Map Signal Address range (A19 - AO) Signal name and description source r*= ----- U2518 pin 11 100X x x x x x x x x...
Page 164: Troubleshooting Measurement Errors
Maintenance—2246 1Y and 2246 Mod A Service Schematic Diagram 12-POW ER SUPPLY 2. Check Readout Request pulse (RO REQ, U2410 pin 14). W A R N IN G I 3. Check Readout Blanking signal ( RO BLANK, U2410 pin 16).
Page 165: Measurement Error Troubleshooting Hints
Maintenance—2246 1Y and 2246 Mod A Service +PEAK, -PEAK, PK-PK Conditions: Type 4 volts measurements are: All vertical channels can be successfully dis played and positioned independently. GATED +PEAK, GATED -PEAK, and GATED PK-PK The A and B sweeps both free-run and trigger successfully.
Page 166 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Symptoms Problem Gross cursor problems for Types 2, 3, and 4 measurements. RO FREEZE line stuck high (U173-11) Gross cursor problems for A TL and B TL.
Page 167 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Symptoms Problem May get “ SEARCH FAILED at . . . ” for “ SELF CAL” on time A Trig Cplg Multiplexer measurements if coupling is stuck in HF REF coupling.
Page 168 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Problem Symptoms B Trig Gross value problems with Types 2, 3, and 4 measurements. (U431C) Gross value problems with B TL. “ SEARCH RETURNED BAD VALUE AT . . . ’’ on time measurements.
Page 169 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Symptoms Problem Effects same as those caused by malfunctions in SR 1. SR 1 CLK line (U606B-4) Test: Check that the A Sweep rate changes when SEC/DIV knob is rotated in the A Horizontal Display Mode.
Page 170 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Problem Symptoms “ SEARCH RETURNED BAD VALUE AT 5 p s ” for “ SELF CAL” on time DLY SEL line stuck low measurements. (U602-32) Test: Use settings given in previous test.
Page 171 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Symptoms Problem Gross value problems with Types 1, 2, 3, and 4 measurements. VOLT CAL 0-2 (U302 & U303) Gross value and cursor problems with A TL and B TL.
Page 172 Maintenance—2246 1Y and 2246 Mod A Service Table 6-9, (cont) Measurement Error Troubleshooting Hints Circuit Symptoms Problem ADC, DAC SYSTEM (schematic Diagram 11) A TRIG LVL See notes for “ A TRIG” (schematic Diagram 3). (U2304C-8) Test: Select A trigger, set A Trig mode to NORM.
Page 173: Corrective Maintenance
If it is necessary to ship your instru 6. Use an isolation transformer to supply power to ment to a Tektronix Service Center for repair or the 2246 1Y or 2246 Mod A if you troubleshoot in service, refer to the Repackaging for Shipment infor power...
Page 174: Repackaging For Shipment
The following information provides the replacement procedures for the various type connectors. 2. If instrument is being shipped to a Tektronix Service Center, enclose the following infor mation: show the owner’s address, name and...
Page 175: Maintenance Aids
Maintenance—2246 1Y and 2246 Mod A Service Table 6-10 Maintenance Aids Specification Usage Description Example Antex Precision General soldering Soldering Iron 15 to 25 W. and unsoldering. Model C. Tektronix Part Numbers: Assembly and Torx Screwdriver Tips Torx tips; #T7, #T9, #T10, #T15, and #T20.
Page 176: Battery
M a in ten a n ce —2246 1Y and 2246 M od A Service BATTERY I CAUTION | t v w w w v r S The 2246 1Y instruments serial numbered B714999 and below use a pair of silver-oxide cells with an life A f t e r r e p la c in g a p o w e r tr a n s is t o r , c h e c k th a t expectancy of 1 year.
Page 177: Removal And Replacement Instructions
Maintenance—2246 1Y and 2246 Mod A Service solder connection with an approved flux- £ CAUTION | removing solvent (such as isopropyl alcohol) and « v w w allow it to air dry. Excessive heat can cause the etched circuit conductors...
Page 178 M ain te n a n c e —2246 1Y and 2246 M od A Service 7. Install the rear-panel. Secure it with four #15 and reinstallation of individual components or sub- assemblies. Circuit board and component locations Torx-head screws.
Page 179 Maintenance—2246 1Y and 2246 Mod A Service BNC Connectors (Vertical Inputs) 5. Remove rear crt shield (held in place by 3 self tapping screw s), To replace BNC Connectors: 6. Place your left hand on crt neck shield and your 1.
Page 180 Maintenance—2246 1Y and 2246 Mod A Service 4. Position the board to align the screw holes and > CAUTION < install the six Torx-head attaching screws (two, 2 v w w w v « 5/8 in. screws in the center and one, 7/16 in.
Page 181 Maintenance—2246 1Y and 2246 Mod A Service 6. Move the Potentiometer/Switch board assembly 13. Secure the circuit board with six screws. back away from the front panel and lift it out of the instrument. 14. Install the power-switch-extension shaft. Snap the shaft onto the switch, then onto the tran...
Page 182 Maintenance—2246 1Y and 2246 Mod A Service A10 Main Board 9. Unsolder the main delay-line wires from both sides of board (see Figures 6-4 and 6-5). NOTE 10. Unclip the delay line from both sides of the board and from the two clips at the lower side of This procedure is intended for the complete the rear panel.
Page 183 Maintenance—2246 1Y and 2246 Mod A Service 22. Install the inside attenuator shield (secure with 20. Connect the three-w ire cable from the c rt- one screw ). Then install the outside attenuator socket cable assembly to J2208 on the Power shield (secure with five screw s).
Page 184 Maintenance—2246 1Y and 2246 Mod A Service 24. Install the Processor board. 25. Dress the two ribbon cables to the top of the instrument. Connect them to the Processor and Potentiometer boards. 26. Install the crt socket. Turn the socket sideways and push it through the crt-socket holder in the rear panel.
Page 186: Introduction
S ection 7 —2246 1Y and 2246 M od A Service OPTIONS INTRODUCTION OPTION 1R RACKMOUNTED INSTRUMENT This section contains a general description of the in When the 2246 1Y or 2246 Mod A Portable Oscil strument options and accessories available at the loscope is ordered with Option 1R, it is shipped in a time of publication of this manual.
Page 188: Replaceable Electrical Parts
If a part you have ordered has been replaced with a new or assemblies and parts). improved part, your local Tektronix, Inc. Field Office or represen tative will contact you concerning any change in part number. Chassis-mounted parts have no assembly number prefix and are located at the end of the Electrical Parts List.
Page 189 Replaceable Electrical Parts 22461Y arid 2246 MOD A Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. City, State, Zip Code Manufacturer Address Code 8300 LANDSHUT GERMANY LUDMILLASTRASSE 23-25 D5243 ROEDERSTEIN E SPEZIALFABRIK FUER KONDENSATOREN GMBN TOKYO JAPAN SONY CONSUMER ELECTRONICS S0482 TOKYO JAPAN OSHINO ELECTRIC LAMP WORKS LTD...
Page 190 Replaceable Electrical Parts 22461Y and 2246 MOD A Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. Code Manufacturer Address City, State, Zip Code 04713 MOTOROLA INC 5005 E MCDOWELL RD PHOENIX AZ 85008-4229 SEMICONDUCTOR PRODUCTS SECTOR 05828 GENERAL INSTRUMENT CORP 600 W JOHN ST HICKSVILLE NY 11802 GOVERNMENT SYSTEMS DIV...
Page 191 PHILADELPHIA DIV TRW FIXED RESISTORS 75498 MULTICOMP INC 3005 SW 154TH TERRACE #3 BEAVERTON OR 97006 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077-0001 PO BOX 500 84411 AMERICAN SHIZUKI CORP 301 WEST O ST OGALLALA NE 69153-1844...
Page 192 Mfr. Part No. 670-9783-01 CIRCUIT BD A£SY:CRT £6NTRd>L 80009 670978301 671-0978-00 B700100 B710099 CIRCUIT BD ASSY:2 MILLIVOLT BANDWIDTH 80009 671097800 (2246 1Y) 671-0978-00 B100100 B110099 CIRCUIT BD ASSY:2 MILLIVOLT BANDWIDTH 80009 671097800 (2246 MOD A,2Y) 671-0875-00 B700100 B710099 CIRCUIT BD ASSYMAIN...
Page 193 Replaceable Electrical Parts 22461Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Mfr. Part No. Number Part No. Effective Dscont Name & D escription Code 80009 670978301 670-9783-01 CIRCUIT BD ASSYiCRT CONTROL BA17140001 A8R901 311-2344-00 RES,VAR,NONWW:CKT BD.4.7K 71590 OHM,20%,1.25WLINE AR...
Page 194 Part No. Effective Dscont Name & Description Number Code Mfr. Part No. 671-0978-00 B700100 B710099 " CIRCUIT BD ASSY:2 MILLIVOLT BANDWIDTH 80009 671097800 (2246 1Y) 671-0978-00 B100100 B110099 CIRCUIT BD ASSY:2 MILLIVOLT BANDWIDTH 80009 671097800 (2246 MOD A,2Y) A9C185 281-0810-00 B100100...
Page 195 Effective Dscont Name & Description Code Mfr. Part No. A9W107 131-0566-00 B700100 B710099 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA 07 (2246 1Y) A9W108 131-0566-00 B100100 B110099 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA 07 (2246 MOD A,2Y) A9W108 131-0566-00...
Page 196 Name & Description Code Mfr. Part No. 671-0875-00 B700100 B710099 80009 671087500 ir c u it b d a s s y m a in (2246 1Y) 671-0875-01 B710100 B710629 CIRCUIT BD ASSYMAIN 80009 671087501 (2246 IV ) 671-0875-02 B710630...
Page 197 B110100 CAR FXD.CER Dl :5.6PF, + /-0.5PF, 10OVTUBULAR, M1 04222 SA102A5R6DAA (2246 MOD A,2Y) A10C185 281-0810-00 B710100 CARFXD.CER DI:5.6PF, + /-0.5PF,100VTUBULAR,MI 04222 SA102A5R6DAA (2246 1Y) A10C186 281-0810-00 B110100 CARFXD.CER DI:5.6PF, + /-0.5PF,100VTUBULAR,MI 04222 SA102A5R6DAA (2246 MOD A,2Y) A10C186 281-0810-00 B710100 CARFXD.CER DI:5.6PF, + /-0.5PF.100VTUBULAR.MI...
Page 198 Part No. Effective Dscont 281-0909-00 B110100 CARFXD.CER D!:0.022UF,20%,50V 04222 SA105C223MAA A10C188 (2246 MOD A.2Y) A10C188 281-0909-00 B710100 CARFXD.CER DI:0.022UF.20%,50V 04222 SA105C223M AA (2246 1Y) A10C190 281-0797-00 CARFXD.CER DI:15PF,10%,100V„TUBULAR,MI 04222 SA106A150KAA A10C191 281-0797-00 CARFXD.CER DI:15PF,10%.100V„TUBULAR,MI 04222 SA106A150KAA A10C201 290-0974-01 CAP,FXD,ELCTLT:10UF,20%,50V 1W344...
Page 199 281-0305-00 B100100 B101874 CARVAR.CER DI:1.5-4.0PF 52769 GKU 4R000 (2246 MOD A,2Y) 281-0305-00 B700100 B700723 CARVAR.CER DI:1.5-4.0PF 52769 GKU 4R000 A10C274 (2246 1Y) 281-0872-00 B100100 B101874 CARFXD.CER DI:91PF,5%.100V 04222 MC101A910J A10C275 (2246 MOD A.2Y) A10C275 281-0776-00 B101875 CARFXD.CER DI:120PF,5%,100V 04222 SA102A121JAA...
Page 200 TK1743 CGB510GEN A10C322 281-0909-00 B110100 CARFXD.CER DI:0.022UF,20%,50V 04222 SA105C223MAA (2246 MOD A,2Y) A10C322 281-0909-00 B710100 CARFXD.CER DI:0.022UF,20%,50V 04222 SA105C223MAA (2246 1Y) A10C326 281-0909-00 CARFXD.CER DI:0.022UF,20%.50V 04222 SA105C223MAA A10C329 281-0307-00 CARVAR.CER DI:3-8-25PF 52769 GKU 25000 A10C330 281-0799-00 CARFXD.CER DI:62PF.2%,100V 04222 SA101A620GAA...
Page 201 SA101A431JAA A10C453 281-0864-00 T322B105K035AS 31433 290-0183-00 CARFXD,ELCTLT:1UF,10%,35V A10C454 SA101C681KAA B710290 CARFXD.CER Dl:680 PF,10%,50V 04222 281-0820-00 B700100 A10C455 (2246 1Y) SA101A271JAA CARFXD.CER DI:270PF.5%,50V 04222 281-0861-00 B710291 A10C455 (2246 1Y) SA101C681KAA CARFXD.CER Dl:680 PF,10%,50V 04222 A10C455 281-0820-00 B100100 B110637 (2246 MOD A,2Y)
Page 202 (2246 MOD A,2Y) SR155C271KAA 283-0196-00 B120000 CARFXD.CER DI:270PF,10%,50V 16299 A10C485 (2246 MOD A,2Y) 04222 SA102A101JAA 281-0765-00 B700100 B710099 CARFXD.CER DI:100PF.5%,100V A10C485 (2246 1Y) B710100 B714999 CARFXD.CER DI:270PF,5%,50V 04222 SA101A271JAA A10C485 281-0861-00 (2246 1Y) SR155C271KAA 283-0196-00 B715000 CARFXD.CER DI:270PF.10%,50V 16299 A10C485...
Page 203: (2246 Mod A)
A10C613 281-0909-00 SA102A121JAA CARFXD.CER DI:120PF,5%,100V 04222 A10C614 281-0776-00 B110100 (2246 MOD A) B710100 CARFXD.CER DI:120PF,5%,100V 04222 SA102A121JAA A10C614 281-0776-00 (2246 1Y) B120000 CARFXD.CER DI:0.022UF,20%,50V 04222 SA105C223MAA A10C636 281-0909-00 (2246 MOD A,2Y) SA105C223MAA CARFXD.CER DI:0.022UF,20%,50V 04222 A10C636 281-0909-00 B715000 (2246 1Y)
Page 204 Part No. Effective Dscont Name & Description Code Number 285-1460-06 B715000 CAR FXD, MTLZD :0.1U F,20% ,250V,5M M LEAD TK1913 MKS 2 0.1/250/2 A10C802 SPACING (2246 1Y) MA302C153KAA A10C803 281-0707-00 B100100 B110099 CARFXD.CER DI:15000PF,10%,200V 04222 (2246 MOD A,2Y) SA105C223MAA A10C803 281-0909-00 B110100 CARFXD.CER DI:0.022UF,20%.50V...
Page 205 {2246 MOD A,2Y) CARVAR.CER DI:0.6-3PF,400V 52763 313613-140 A10C814 281-0214-00 B110100 (2246 MOD A.2Y) 52769 ER-530-013 A10C814 281-0064-00 B700100 B710099 CARVAR,PLASTIC:0.25-1.5PF.600V (2246 1Y) CARVAR.CER DI:0.6-3PF,400V 52763 313613-140 A10C814 281-0214-00 B710100 (2246 1Y) CARFXD.CER DI:0.022UF.20%,50V 04222 SA105C223MAA A10C815 281-0909-00 04222 SA105C223MAA A10C816 281-0909-00 CARFXD.CER DI:0.022UF,20%.50V...
Page 206 285-1339-00 CARFXD,MTLZD:0.022UF.10%,63V TK1913 A10C1001 290-0974-01 CARFXD,ELCTLT:10UF,20%,50V 1W344 KMC50VB10RM5X11 A10C1002 290-0974-01 B700100 B710172 CAR FXD, ELCTLT: 10UF,20% ,50V 1W344 KMC50VB1ORM5X11 (2246 1Y) A10C1002 290-0974-00 B710173 CARFXD, ELCTLT: 10UF,20% ,50VDC 55680 UVX1H100MAA (2246 1Y) A10C1002 290-0974-01 B100100 B110288 CARFXD,ELCTLT:10UF,20%,50V 1W344 KMC50VB1ORM5X11 (2246 MOD A.2Y)
Page 207: (2246 Mod A)
Code Mfr. Part No. Name & D escription Effective Dscont Number Part No. 31433 T322B105K035AS CAR FXD.ELCTLT: 1UF. 10% ,35V 290-0183-00 B710630 A10C1108 (2246 1Y) 31433 T322B105K035AS CARFXD,ELCTLT:1UF,10%,35V B111186 A10C1108 290-0183-00 (2246 MOD A,2Y) SA101A620GAA 04222 CARFXD.CER DI:62PF,2%,100V A10C1110 281-0799-00 SA101A620GAA CARFXD.CER DI:62PF,2%.100V...
Page 208 B120000 £ARFXD.MTLZD:0.1 UF,20%,250V.5MM LEAD TK1913 MKS 2 0.1/250/2 SPACING (2246 MOD A,2Y) 283-0057-00 B700100 B714999 A10C2708 CAP.FXD.CER DI:0.1UF, + 80-20%.200V 04222 SR302E105ZAA (2246 1Y) A10C2708 285-1460-00 B715000 MKS 2 0.1/250/2 CARFXD,MTLZD:0.1UF,20%.250V,5MM LEAD TK1913 SPACING (2246 1Y) A10C2709 283-0057-00 B100100 B119999 CARFXD.CER DLO.IUF,+ 80-20% ,200V...
Page 209 MKS 2 0.1/250/2 A10C2783 285-1460-00 SPACING (2246 A,2Y) 04222 SR302E105ZAA CARFXD.CER Dl:0.1 UF, + 80-20% ,200V 283-0057-00 B700100 B714999 A10C2783 (2246 1Y) CARFXD,MTLZD:0.1UF,20%,250V,5MM TK1913 MKS 2 0.1/250/2 285-1460-00 B715000 LEAD A10C2783 SPACING (2246 1Y) 04222 SA105C223MAA 281-0909-00 CARFXD.CER DI:0.022UF,20%,50V A10C2784...
Page 210 Mfr. Code Mfr. Part No. Number Part No. Effective Dscont Name & Description A10CR802 152-0061-00 B700100 B710099 SEMICOND DVC,DI:SW,SI,175V,0.1A,DO-35CD8393 12969 PV122 (2246 1Y) A10CR802 152-0141-02 B710100 DIODE.SIG:,ULTRA FAST;40V,150MA,4NS,2PF 27014 FDH9427 (2246 1Y) A10CR803 152-0141-02 B113047 DIODE.SIG:,ULTRA FAST;40V,150MA,4NS,2PF 27014 FDH9427 (2246 MOD A.2Y)
Page 211 (2246 MOD A,2Y) 00779 1-86479-3 B710099 CONN,HDR:PCB,;MALE,RTANG,2 X 1,0.1 CTR, A10J927 131-2921-00 B700100 0.318 MLG X 0.110 TAIL,0.238 H,30 GOLD (2246 1Y) CONN,HDR:PCB,;MALE,STR,1 X 2,0.1 CTR,0.230 00779 103239-2 131-4546-00 B710100 A10J927 MLG X 0.120 TAIL,30 GOLD (2246 1Y) CONN,BOX PWR:PCB,;FEMALE,STR,1 X 13,0.156...
Page 212 IR-2.330 MICRO A10L446 108-1339-00 B100100 B110099 COIL,RF:FXD,330NH (2246 MOD A,2Y) IR-2.330 MICRO A10L446 108-1339-00 B700100 B710099 COIL,RF:FXD,330NH 91637 (2246 1Y) A10L462 108-1341-00 COIL,RF:FXD,180NH,10%,0.1 OHM.1100MA Ml 91637 IR-2 0.180 MICR AXIAL LEADS 108-1339-00 COIL,RF:FXD,330NH 91637 IR-2.330 MICRO A10L475 A10L476 108-1339-00 B100100 B110099 CO 1 L, RF: FXD.330N H...
Page 213 Replaceable Electrical Parts 22461Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Code Mfr. Part No. Effective Dscont Name & Description Number Part No. TRANSl£rOR,SIG:BIPOLAR,NPN;30V,500MA, 0JR04 MPSA14, TPE2 A10Q301 151-0254-03 125MHZ, AMPLIFIER, DARLINGTON 2N3906 TRANSISTOR,SIG:BIPOLAR,PNP;40V,200MA, 04713 A10Q302 151-0188-00 250MHZ,AMPLIFIER TRANSISTOR,SIG:BIPOLAR,PNP;40V,200MA,...
Page 214 (2246 MOD A,2Y) A10Q801 151-0270-00 B110100 TRANSISTOR:PNRSI,TO-39 04713 ST919 (2246 MOD A,2Y) A10Q801 151-1212-00 B700100 B710099 VP0116N2 TRANSISTOR,PWR:MOS,P-CH;160V,0.25A,25 OHM 59640 (2246 1Y) A10Q801 151-0270-00 B710100 TRANSISTOR: PN P,SI,TO-39 04713 ST919 (2246 1Y) A10Q802 151-1211-00 B100100 B110099 TRANSISTOR,PWR:MOS,N-CH;160V,0.25A,40 OHM 59640 VN1316N2...
Page 215 (2246 MOD A,2Y) 0JR04 2N4401 A10Q803 151-0736-00 B700100 B710099 TRANSISTOR:NPN,SI,TO-92 (2246 IV ) B710100 TRANSISTOR,SIG:BIPOLAR,NPN;40V,200MA, 04713 2N3904 A10Q803 151-0190-00 300MHZ,AMPLIFIER (2246 1Y) A10Q804 151-0712-00 B100100 B110099 TRANSISTOR,SIG:BIPOLAR,PNP;20V,50MA,600MHZ 04713 MPSH81 AMPLIFIER (2246 MOD A.2Y) A10Q804 151-0190-00 B110100 TRANSISTOR,SIG:BIPOLAR,NPN;40V,200MA, 04713 2N3904 300MHZ,AMPLIFIER...
Page 216 AMPLIFIER TRANSISTOR,SIG:BIPOLAR,NPN;40V,200MA, 04713 2N3904 B110100 A10Q811 151-0190-00 300MHZ.AMPLIFIER (2246 MOD A,2Y) TRANSISTOR,SIG:BIPOLAR,NPN;40V,200MA, 04713 2N3904 151-0190-00 B710100 A10Q811 300MHZ,AMPLIFIER (2246 1Y) 2D532 PTBTC105BK 151-0220-00 TRANSISTOR,SIG:BIPOLAR,PNP;40V,200MA, A10O812 B110100 400MHZ,AMPLIFIER (2246 MOD A,2Y) TRANSISTOR,SIG:BIPOLAR,PNP;40V,200MA, 2D532 PTBTC105BK 151-0220-00 B710100 A10Q812 400MHZ,AMPLIFIER (2246 1Y)
Page 217 315-0620-00 B120000 TK1727 RES,FXD,FILM:62 OHM,5%.0.25W SFR25 2322-181- (2246 MOD A.2Y) 315-0390-00 B714999 TK1727 A10R131 B700100 RES,FXD,FILM:39 OHM,5%,0.25W SFR25 2322-181- (2246 1Y) A10R131 315-0620-00 B715000 RES,FXD,FILM:62 OHM,5%.0.25W TK1727 SFR25 2322-181- (2246 1Y) A10R132 322-3443-00 RES,FXD,FILM:402K OHM.1 %,0.2W,TC = T0MI 91637 CCF501G40202F...
Page 218 Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A10R151 315-0620-00 B715000 RE&,FXD,FILM:62 OHM,5%,0.25W TK1727 SFR25 2322-181- (2246 1Y) A10R152 322-3443-00 RES,FXD.FILM:402K OHM.1%,0.2W,TC=T0MI CCF501G40202F 91637 A10R153 322-3443-00 RES,FXD,FILM:402K OHM,1%,0.2W,TC = T0MI CCF501G40202F 91637 A10R154 322-3414-00 RES,FXD,FILM:200K OHM,1%,0.2W,TC=T0MI...
Page 219 Name & Description Code Mfr. Part No. Part No. Effective Dscont Number RES,VAR,N6NWW:TRIMMER,5K OHM,10% 32997 3386R-EA5-502 A10R211 311-2329-00 B700100 B710099 (2246 1Y) 3362U-EP6-502R RES,VAR,NONWW:TRMR,5K OHM,20%,0.5W.LOG 32997 A10R211 311-2454-00 B710100 B714999 (2246 1Y) TK2073 311-2232-00 B715000 RES,VAR,NONWW:TRMR,2K OHM,20%,0.5W GF06UT2 202 M L...
Page 220 GF06UT2 202 M L A10R231 311-2232-00 B120000 RES,VAR,NONWW:TRMR,2K OHM,20%,0.5W LINEAR (2246 MOD A,2Y) B710099 3386R-EA5-502 A10R231 311-2329-00 B700100 RES,VAR,NONWW:TRIMMER,5K OHM,10% 32997 (2246 1Y) A10R231 311-2454-00 B710100 B714999 RES.VAR, NONWW:TRM R,5K OHM,20%,0.5W.LOG 32997 3362U-EP6-502R (2246 1Y) A10R231 311-2232-00 B715000 RES,VAR,NONWW:TRMR,2KOHM,20%,0.5W TK2073...
Page 221 313-1243-00 B700100 B714999 RES,FXD,FILM:24K OHM,5%,0.2W 57668 (2246 IV) 91637 CCF50-2-47001J A10R261 313-1473-00 B715000 RES,FXD,FILM:47K OHM,5%,0.2W (2246 1Y) RES,FXD,FILM:71.5 OHM,1 %,0.2W,TC = T0MI 91637 CCF501G71R50F A10R262 322-3083-00 RES,FXD.FILM:71.5 OHM, 1 % ,0.2W,TC = TOM 1 91637 CCF501G71R50F A10R263 322-3083-00 CCF501G71R50F 322-3083-00 RES,FXD,FILM:71.5 OHM.1 %,0.2W,TC = T0MI...
Page 222 Replaceable Electrical Parts 22461Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Effective Dscont Name & Description Code Mfr. Part No. Number Part No. 91637 66F501 Cal 62R0F A10R296 322-3117-00 RES,FXD,FILM: 162 OHM, 1 %,0.2W,TC = TOM 1...
Page 223 Replaceable Electrical Parts 22461Y and 2246 MOD A Service Mfr. Serial No. Component Tektronix Effective Dscont Name & Description Code Mfr. Part No. Number Part No. RES,FXD,FILM:1.6K OHM,5%,0.2W 91637 CCF50-2-16000J A10R343 313-1162-00 RES,FXD,FILM:3.3K OHM.5%.0.2W 91637 CCF50-2-33000J A10R344 313-1332-00 RES,FXD,FILM:10 OHM,5%,0.2W...
Page 224 313-1101-00 B100100 B110099 RES,FXD,FILM:100 OHM,5%,0.2W 91637 CCF50-2-100R0J (2246 MOD A,2Y) A10R402 313-1101-00 B700100 B710099 RES,FXD,FILM:100 OHM,5%,0.2W CCF50-2-1 O OROJ 91637 (2246 1Y) A10R403 313-1511-00 B110100 RES,FXD,FILM:510 OHM,5%,0.2W 91637 CCF50-2-51OROJ (2246 MOD A,2Y) A10R403 313-1511-00 B710100 RES,FXD,FILM:510 OHM,5%,0.2W 91637 CCF50-2-51ORO J...
Page 225 CCF50-2-330ROJ 313-1331-00 B110100 RES,FXD,FILM:330 OHM,5%,0.2W 91637 A10R413 (2246 MOD A,2Y) CCF50-2-51ORO J RES,FXD,FILM:510 OHM,5%,0.2W 91637 A10R413 313-1511-00 B700100 B710099 (2246 1Y) CCF50-2-330ROJ 313-1331-00 B710100 RES,FXD,FILM:330 OHM,5%,0.2W 91637 A10R413 (2246 1Y) A10R414 313-1511-00 B100100 B110099 RES,FXD,FILM:510 OHM,5%,0.2W 91637 CCF50-2-51 ORO J (2246 MOD A.2Y)
Page 226 CCF50-2-330ROJ 91637 CCF501G90900F A10R447 322-3285-00 B110100 RES,FXD,FILM:9.09K OHM,1%,0.2W,TC = T0MI (2246 MOD A,2Y) A10R447 322-3285-00 B710100 RES,FXD,FILM:9.09KOHM,1%,0,2W,TC = T0MI 91637 CCF501G90900F (2246 1Y) B110100 RES,FXD,FILM:28.7K OHM,0.2W,.5% 91637 CCF501D28701D A10R448 322-3333-02 (2246 MOD A,2Y) A10R448 B710100 RES,FXD,FILM:28.7K OHM,0.2W,.5% 91637 CCF501D28701D 322-3333-02 (2246 1Y) RES,FXD,FILM:3.9K OHM,5%,0.2W...
Page 227 (2246 MOD A,2Y) RES,FXD.FILM:8.87K OHM,1%,0.2W.TC=T0MI 91637 CCF501G88700F 322-3284-00 B110100 A10R477 (2246 MOD A,2Y) RES,FXD,FILM:9.09K OHM,1%,0.2W,TC=T0MI 91637 CCF501G90900F A10R477 322-3285-00 B700100 B710099 (2246 1Y) RES,FXD,FILM:8.87K OHM,1%.0.2W,TC = T0MI 91637 CCF501G88700F A10R477 322-3284-00 B710100 (2246 1Y) 91637 CCF501D28701D A10R478 322-3333-02 B100100 B110099 RES,FXD,FILM:28.7K OHM,0.2W„5%...
Page 228 RES,FXD,FILM:1K OHM,5%,0.2W CCF501G51ROOJ A10R607 313-1510-00 B100100 B110099 RES,FXD,FILM:51 OHM,5%,0.2W 91637 (2246 MOD A,2Y) 91637 CCF501G51ROOJ 313-1510-00 B700100 B710099 RES,FXD,FILM:51 OHM.5%,0.2W A10R607 (2246 1Y) A10R609 313-1101-00 RES,FXD,FILM:100 OHM,5%,0.2W 91637 CCF50-2-100R0J 313-1391-00 RES,FXD,FILM:390 OHM,5%,0.2W 91637 CCF50-2-390R0J A10R610 A10R611 313-1101-00 RES,FXD,FILM:100 OHM,5%,0.2W 91637 CCF50-2-100R0J...
Page 229 91637 CCF50-2-33001J A10R673 313-1331-00 B110100 RES,FXD,FILM:330 OHM,5%,0.2W 91637 CCF50-2-330ROJ (2246 MOD A,2Y) A10R673 313-1331-00 B710100 RES,FXD,FILM:330 OHM,5%.0.2W 91637 CCF50-2-330ROJ (2246 1Y) A10R674 313-1201-00 B110100 RES,FXD,FILM:200 OHM,5%,0.2W 91637 CCF50-2-200R0J (2246 MOD A.2Y) B710100 A10R674 313-1201-00 RES,FXD,FILM:200 OHM.5%,0.2W 91637 CCF50-2-200R0J (2246 1Y)
Page 230 Effective Dscont RES,FXD,FILM:75 OHM,5%,0.2W 91637 CCF50-2-75R0OJ A10R690 313-1750-00 B110100 (2246 MOD A,2Y) RES,FXD.FILM:75 OHM,5%,0.2W 91637 CCF50-2-75R00J A10R690 313-1750-00 B710100 (2246 1Y) 91637 CCF50-2-75R00J A10R691 313-1750-00 B110100 RES,FXD.FILM:75 OHM,5%,0.2W (2246 MOD A.2Y) RES,FXD,FILM:75 OHM.5%,0.2W 91637 CCF50-2-75R00J A10R691 313-1750-00 B710100 (2246 1Y) RES,FXD,FILM:75 OHM.5%,0.2W...
Page 231 (2246 MOD A,2Y) 91637 CCF50-2-680ROJ RES,FXD,FILM:680 OHM,5%,0.2W A10R801 313-1681-00 B110100 (2246 MOD A,2Y) 91637 CCF50-2-430ROJ B710099 RES,FXD,FILM:430 OHM,5%,0.2W A10R801 313-1431-00 B700100 (2246 1Y) 91637 CCF50-2-680ROJ 313-1681-00 B710100 RES,FXD,FILM:680 OHM,5%,0.2W A10R801 (2246 1Y) RES,FXD,FILM:75 OHM,5%,0.2W 91637 CCF50-2-75R00J A10R802 313-1750-00 91637 CCF50-2-56000J...
Page 232 RES,FXD,FILM:5.62K OHM,1%,0.2W,TC = T0MI 91637 CCF501G56200F (2246 MOD A,2Y) A10R811 322-3266-00 B700100 B710099 RES.FXD,FILM:5.76K OHM, 1 %,0.2W,TC = TOM 1 91637 CCF501G57600F (2246 1Y) A10R811 322-3265-00 B710100 RES,FXD.FILM:5.62K OHM,1 %,0.2W,TC = TOM 1 91637 CCF501G56200F (2246 1Y) A10R812 322-3266-00 B100100 B110099 RES,FXD,FILM:5.76K OHM.1 %,0.2W,TC = T0MI...
Page 233 Mfr. Part No. Number Part No. Effective Dscont CMF6042G15002F 322-0402-00 RES, FXD.FILM: 150K OH M ,1 % ,0.25W,TC= TO 91637 A10R820 B715000 (2246 1Y) CCF50G15002F 322-3402-00 B100100 B119999 RES,FXD,FILM:150K OHM,1%,0.2W,TC = T0MI 91637 A10R821 (2246 MOD A,2Y) CM F6042G15002F A10R821...
Page 234 Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A10R&40 313-1470-00 B700100 B710099 RES,FXD,FILM:47 OHM,5%,0.2W 91637 CCF50-2-47ROOJ (2246 1Y) A10R841 B100100 B110099 313-1100-00 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-10R00J (2246 MOD A.2Y) A10R841 313-1100-00 B700100 B710099 RES,FXD,FILM:10 OHM,5%,0.2W...
Page 235 Part No. CCF50-2-47R00J RES,FXD.FILM:47 OHM,5%,0.2W 91637 313-1470-00 B100100 B110099 A10R853 (2246 MOD A,2Y) 91637 CCF50-2-47R00J RES,FXD,FILM:47 OHM,5%,0.2W B700100 B710099 A10R853 313-1470-00 (2246 1Y) 91637 CCF50-2-200R0J RES,FXD,FILM:200 OHM,5%,0.2W A10R854 313-1201-00 CCF50-2-200ROJ RES,FXD,FILM:200 OHM,5%,0.2W 91637 313-1201-00 A10R855 91637 CCF50G10001F RES,FXD,FILM:10K OHM,1%,0.2W,TC=T0 A10R856 322-3289-00 RES,FXD,FILM:5.62K OHM,1 %,0.2W,TC = T0MI...
Page 236 Serial No. Code Mfr. Part No. Number Effective Dscont Name & D escription Part No. 91637 CCF50-2-75R00J A10R892 313-1750-00 B710100 RES,FXD,FILM:75 OHM,5%,0.2W (2246 1Y) RES,FXD,FILM:390 OHM,5%,0.2W 91637 CCF50-2-390ROJ A10R893 313-1391-00 B110100 (2246 MOD A,2Y) CCF50-2-390R0J A10R893 313-1391-00 B710100 RES,FXD,FILM:390 OHM,5%,0.2W...
Page 237 313-1100-00 B100100 B i l l 186 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-10R00J (2246 MOD A,2Y) A10R1101 313-1100-00 B700100 B710630 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-10R00J (2246 1Y) A10R1102 313-1100-00 B100100 B111186 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-10R00J (2246 MOD A,2Y) A10R1102 313-1100-00 B710630 CCF50-2-10R00J B700100 RES,FXD,FILM:10 OHM,5%,0.2W...
Page 238 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-10R00J A10R1160 313-1100-00 B110100 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-10R00J (2246 MOD A,2Y) A10R1160 313-1100-00 B710100 RES,FXD,FILM:10 OHM,5%,0.2W 91637 CCF50-2-1OROOJ (2246 1Y) A10R1162 313-1302-00 RES,FXD,FILM:3K OHM,5%,0.2W 91637 CCF50-2-30000J A10R1163 313-1152-00 RES,FXD,FILM:1,5K OHM,5%,0.2W 91637 CCF50-2-15000J A10R1170 313-1152-00 RES,FXD,FILM:1.5K OHM,5%,0.2W CCF50-2-15000J 91637...
Page 239 Serial No. Component Mfr. Part No. Name & D escription Code Part No. Effective Dscont Number 91637 CCF50-2-1OOROJ RES,FXD,FILM:100 OHM,5%,0.2W 313-1101-00 A10R1211 (2246 1Y) CCF50-2-100R0J RES,FXD.FILM:100 OHM,5%.0.2W 91637 313-1101-00 B120000 A10R1220 (2246 MOD A,2Y) 91637 CCF50-2-1 OOROJ RES,FXD,FILM:100 OHM,5%,0.2W 313-1101-00 B715000...
Page 240 Replaceable Electrical Parts 22461Y and 2246 MOD A Service Serial No. Component Tektronix Mfr. Mfr. Part No. Number Part No. Effective Dscont Name & D escription Code A10R2701 322-3112-00 RES,FXD,FI LM: 143 OHM,1%,0.2W,TC = T0MI 91637 CCF501G143R0F A10R2702 313-1393-00 RES,FXD,FILM:39K OHM,5%,0.2W...
Page 241 165-2232-01 B101583 MICROCKT,LINEAR:BUFFER AMPLIFIER W/3 GAIN 80009 165223201 SETTINGS (2246 MOD A,2Y) A10U112 165-2232-00 B700100 B700493 MICROCKT,LINEAR:BUFFER AMPLIFIER 80009 165223200 (2246 1Y) B700494 MICROCKT,LINEAR:BUFFER AMPLIFIER W/3 GAIN A10U112 165-2232-01 80009 165223201 SETTINGS (2246 1Y) A10U122 165-2232-00 B100100 B101582 MICROCKT,LINEAR:BUFFER AMPLIFIER...
Page 242 74HCT4094N A10U173 156-3944-00 AND STORE BUS REGISTER (2246 MOD A,2Y) 04713 MC14094BCP A10U173 156-0796-00 B700100 B714999 1C,DIGITALiCMOS,SHIFT REGISTER;8-STAGE SHIFT/STORE, 3-STATE (2246 1Y) A10U173 156-3944-00 B715000 IC,DIGITAL:HCTCMOS,REGISTER;8-STAGE SHIFT 18324 74HCT4094N AND STORE BUS REGISTER (2246 1Y) A10U174 IC.LINEAR:BIPOLAR,TRANSISTOR 34371 CA3082-98 156-1190-00 ARRAY;SEVEN,NPN,COMMON COLLECTOR,OPEN...
Page 243 Mfr. Part No. Code Name & Description Part No. Effective Dscont Number 80009 234023930 QUICK CHIPlTRIGGER 1C PACKAGE B710100 B710999 A10U421 234-0239-36 (2246 1Y) 80009 234023931 QUICK CHIPlTRIGGER CIRCUIT,28PLCC W/AU 234-0239-31 B711000 A101)421 LEAD (2246 1Y) 80009 234023920 B100100 B110099...
Page 244 (2246 MOD A.2Y) 156-0158-00 B120000 A10U801 IC,LINEAR:BIPOLAR,OP-AMP;DUAL 04713 MC1458P1 (2246 MOD A,2Y) A10U801 156-0158-07 B700100 B714999 1C,LINEARiBIPOLAR,OP-AMP 01295 MC1458P (2246 1Y) A10U801 156-0158-00 B715000 IC,LINEAR:BIPOLAR,OP-AMP;DUAL 04713 MC1458P1 (2246 1Y) QUICK CHIP:GPS HORIZ PREAMP A10U802 234-0401-21 80009 234040121 A10U901 156-2702-00 IC,LINEAR:BIPOLAR,OP-AMP;DUAL,HIGH OUTPUT...
Page 245 152-0265-00 B100100 B110099 DIODE,ZENER:,;24V,5%,0.4W 04713 (2246 MOD A,2Y) 04713 1N970BRL A10VR802 152-0265-00 B700100 B710099 DIODE, ZENER:, ;24V, 5%, 0.4W (2246 1Y) 04713 1N960BRL A10VR2701 152-0306-00 SEMICOND DVC,DI:ZEN,SI,9.1V,5%,0.4W,DO-71 N9 60B.MI A10W9 198-5523-00 WIRE SET,ELEC:SOCKET ASSY CRT, 0J7N9 PER TEK DRAWING 0J7N9...
Page 246 BUS,CONDUCTOR:DUMMY RES.0.094 OD X 0.225L 24546 OMA 07 (2246 MOD A,2Y) A10W403 131-0566-00 B700100 B710099 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA 07 (2246 1Y) A10W4Q4 131-0566-00 B100100 B110099 BUS,CONDUCTOR:DUMMY RES.0.094 OD X 0.225L 24546 OMA 07 (2246 MOD A,2Y) A10W404 131-0566-00...
Page 247 24546 131-0566-00 B110100 A10W506 (2246 MOD A,2Y) OMA07 BUS,CONDUCTOR:DUMMY RES.0.094 OD X 0.225L 24546 131-0566-00 B710100 A10W506 (2246 1Y) OMA07 BUS.CONDUCTOR:DUMMY RES.0.094 OD X 0.225L 24546 B110100 A10W507 131-0566-00 (2246 MOD A,2Y) 24546 OMA07 BUS,CONDUCTOR:DUMMY RES.0.094 OD X 0.225L 131-0566-00...
Page 248 Effective Dscont Name & D escription Code Mfr. Part Number Part No. BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L A10W1104 131-0566-00 B710630 24546 (2246 1Y) A10W1104 131-0566-00 B111186 BUS,CONDUCTOR:DUMMY RES.0.094 OD X 0.225L 24546 OMA07 (2246 MOD A.2Y) 131-0566-00 24546 OMA 07...
Page 249 B112869 (2246 MOD A,2Y) B710999 00779 3-821581-1 A10X421 136-1005-00 B700100 SKT.PL-IN ELEK:PLCC,PCB,28 POS.0.05 CTR, 0.360 H X 0.125 TAIL,TIN,0.55-0.75 1C SHOULDER; TUBE/18 EA. (2246 1Y) 136-1065-00 B711000 SKT.PL-IN ELEK:MICROCKT,28 PIN.LOW PROFILE 00779 641746-2 A10X421 (2246 1Y) A10X431 136-1005-00 B100100 B112868 SKT,PL-IN ELEK:PLCC,PCB,28 POS.0.05 CTR,...
Page 250 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. 66664 670-9402-01 CIRCUIT BD ASSY:P6TENTIOMETER 670940201 A12J2105 131-3626-00 CONN,BOX::PCB,SIP; FEMALE,STR.1 X 17,0.1 00779 2-643649-3 CTR.0.21 H X 0.120 TAIL,TIN,BECU,BD RETENTION...
Page 251 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Serial No. Component Tektronix Mfr. Part No. Name & D escription Code Number Part No. Effective Dscont 80009 670939901 CIRCUIT BD ASSY:SWITCH 670-9399-01 DIODE,SIG:,ULTRA FAST;40V,150MA,4NS,2PF 27014 FDH9427 A14CR2001 152-0141-02 DIODE,SIG:,ULTRA FAST;40V,150MA,4NS,2PF...
Page 252 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Component Tektronix Serial No. Mfr. Number Pert No. Effective Dscont Name & Description Code Mfr. Part No. A14DS2045 LT EMITTING DIO:YELLOW QLMP-1487 150-1161-00 50434 A14DS2046 150-1161-00 LT EMITTING DIO:YELLOW 50434...
Page 253 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Tektronix Serial No. Component Effective Dscont Name & Description Code Mfr. Part No. Number Part No. B700100 B711092 CIRCUIT BD ASSY:PROCESSOR ’ 80009 672130600 672-1306-00 (2246 1Y) (WITH U2519 FIRMWARE) B711093 CIRCUIT BD ASSYPROCESSOR.671-1086-XX...
Page 254 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Part No. Effective Dscont Code Mfr. Part No. Number Name & Description TK2190 V391 A16A1BT2502 146-0067-00 B700100 B715000 BATTERY,DRY:SILVER bXIDE,MODEL #391 (2246 1Y) SA101A220KAA A16A1C2300 281-0759-00 CARFXD.CER DI:22PF,10%,100V...
Page 255 281-0809-00 CARFXD.CER Dl:200 PF.5%,100V 04222 SA105E104MAA A16A1C2415 281-0775-01 CARFXD.CER DI:0.1UF,20%,50V 04222 CARFXD.CER Dl:51 PF,1 %.100V TK1743 CGB510GEN A16A1C2416 281-0798-00 B700100 B710099 (2246 1Y) CARFXD.CER DI:47PF,10%,100V 04222 SA102A470KAA A16A1C2416 281-0763-00 B710100 (2246 1Y) A16A1C2416 281-0798-00 B100100 B110099 CARFXD.CER DI:51PF,1%,100V TK1743 CGB510GEN...
Page 256 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A16A1C2420 281-0763-00 B710100 CARFXD.CER DI:47PF,10%,100V 04222 SA102A470KAA (2246 1Y) A16A1C2420 281-0798-00 B110099 TK1743 B100100 CARFXD.CER DI:51PF,1%,100V...
Page 257 Number SA102A470KAA CARFXD.CER DI:47PF,10%,100V 04222 B110100 A16A162551 281-0763-00 (2246 MOD A.2Y) TK1743 CGB510GEN CARFXD.CER DI:51PF,1%,100V 281-0798-00 B700100 B710099 A16A1C2552 (2246 1Y) SA102A470KAA CARFXD.CER DI:47PF,10%,100V 04222 281-0763-00 B710100 A16A1C2552 (2246 1Y) TK1743 CGB510GEN 281-0798-00 B100100 B110099 CARFXD.CER DI:51PF,1%,100V A16A1C2552 (2246 MOD A,2Y)
Page 258 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Serial No. Component Tektronix Mfr. Part No. Effective Dscont Name & D escription Mfr. Part No. Number Code TRANSISTOR:NPN,SI,PWR DARLINGTON,1W.TO-92 151-0716-01 04713 MP&e/^SALftp A16A1Q2503 PLUS TRANSISTOR:NPN,SI,PWR DARLINGTON,1W.TO-92 04713 A16A1Q2504 151-0716-01...
Page 259 — 3 “ 3 “ 3 “ 3 — 3 — 3 ~3 — 3 — 3 — y — 3 — 3 — 3 — > h» h*. N . h» © '0 - M- M ’ CM CM CM CM CM CM CM CM CM C M CM CM CM CM §...
Page 260 “ 3 O “ 3 “ 3 “ 3 “ 3 ” 3 “ 3 “ 3 “> cr X C M O C M 5 N- K N- N . ■ ' t f ' H" C O C O CM CM CM CM C M CM CM...
Page 261 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Component Tektronix Mfr. Serial No. Code Mfr. Part No. Number Part No. Effective Dscont Name & Description CCF50-2-620ROJ A16A1R2503 313-1621-00 RES,FXD,FILM:620 OHM,5%,0.2W 91637 A16A1R2504 313-1472-00 RES,FXD,FILM:4.7K OHM,5%,0.2W 91637 CCF50-2-47000J A16A1R2505 313-1621-00 RES,FXD,FILM:620 OHM,5%,0.2W...
Page 262 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Serial No. Component Tektronix Code Mfr. Part No. Name & Description Effective Dscont Part No. Number 91637 CCF50-2-22R00J RES,FXD,FILM:22 OHM,5%,0.2W A16A1R2551 313-1220-00 CCF50-2-22R00J 91637 RES,FXD,FILM:22 OHM,5%,0.2W 313-1220-00 A16A1R2552 91637 CCF50-2-22R00J RES,FXD.FILM:22 OHM,5%,0.2W...
Page 263 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Number Part No. Effective Dscont Code Mfr. Part No. Name & Description CY6116-55PC A16A1U2406 156-2016-00 B102626 IC,MEMORY:NMOS,SRAM;2K X 8,100NS,OE 65786 (2246 MOD A,2Y) A16A1U2406 156-1594-00...
Page 264 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Serial No. Component Tektronix Code Mfr. Part No. Part No. Effective Dscont Name & Description Number 00779 2-644018-3 136-0963-00 SOCKET,DIP:PCB,;STR,2 X 16,32 P6S,0.1 X 0.6 A16A1XU2519 M 0.008-0.014 THK 1C LEAD 51406 CSA 16.00MX11...
Page 265 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Tektronix Serial No. Component Mfr. Part No. Code Number Part No. Effective Dscont Name & Description 670939804 CIRCUIT BD ASSYLV POWER SUPPLY 80009 670-9398-04 (2246 1Y) 670939804 CIRCUIT BD ASSYLV POWER SUPPLY...
Page 266 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Tektronix Serial No. Component Effective Dscont Name & D escription Code Mfr. Part No. Part No. Number 281-0773-00 CARFXD.CER DI:0.01UF,10%,100V„TUBU1_AR,MI 04222 SA201C103KAA A1862249 04713 MUR460RL 152-0661-01 SEMICOND DVC,DI:RECT,SI,600V,3A A18CR2201...
Page 267 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Mfr. Part No. Number Part No. Effective Dscont Name & Description Code INDUCTOR,FIXED:33UH,10%.1.8A S4583 TSL1110-330K 1R A18L2206 108-1319-00 B113047 (2246 MOD A,2Y) A18L2207 108-1357-00 COIL,RF:FXD,POWER...
Page 268 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Tektronix Serial No. Component Name & Description Code Part No. Part No. Effective Dscont Mfr. Number 91637 CCF50-2-20001J RE£,FXD,FILM:20K OHM,5%,0.2W 313-1203-00 A18R2221 91637 CCF50-2-10001J RES,FXD,FILM:10K OHM,5%,0.2W A18R2222 313-1103-00 91637...
Page 269 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Serial No. Component Tektronix Code Mfr. Part No. Effective Dscont Name & Description Number Part No. CT3-5R100J RES,FXD,FILM:5.1 OHM,5%,0.2W 91637 A18R2272 313-1051-00 91637 CT3-5R100J RES,FXD,FILM:5.1 OHM,5%,0.2W 313-1051-00 A18R2273 CCF50-2-10001J RES,FXD,FILM:10K OHM,5%,0.2W...
Page 270 Replaceable Electrical Parts 2246 1Y and 2246 MOD A Service Mfr. Component Tektronix Serial No. Code Mfr. Part No. Number Part No. Effective Dscont Name & Description 119-2063-00 B700100 B710985 FAN,TUBEAXIAL:12V,130MA,19.4 dFM 61529 A1F891003 (2246 1Y) 119-3564-00 B710986 FAN,TUBEAXIAL:12VDC,2.6W,3200RPM,36CFM TKOIH...
Page 271 Section 9— 2246 1Y and 2246 Mod A Service DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS Symbols Graphic symbols and class designation letters are Y14.15-1966 Drafting Practices. based on ANSI Standard Y32.2-1975. Y14.2M-1979 Line Conventions and Lettering. ANSI/IEEE 280-1985 Letter Symbols for Quantities Used in Electrical Science Logic symbology is based on ANSI/IEEE 91-1984.
Page 272 © and © - 1st, 2nd, and 3rd significant figures —m u ltip lie r —tolerance —temperature co e fficie n t —p o la rity and voltage rating COLOR RESISTORS SIGNIFICANT FIGURES MULTIPLIER TOLERANCE BLACK — ±i% BROWN ±2% 102 or 100 ±3% ORANGE...
Page 273 and Q - 1st, 2nd, and 3rd significant figures —m u ltip lie r —tolerance —temperature co e fficie n t —p o la rity and voltage rating RESISTORS COLOR S IG N IF IC A N T FIG URES M U L T IP L IE R T O LE R A N C E BLA C K...
Page 274: Semiconductor Lead Configurations
METAL CASE ___________________ , ,_________________ PLASTIC CASE TRANSISTORS TRANSISTORS TRANSISTOR CATHODE IS FLAT SIDE WITH SHORT LEAD L-------------------------------------------------------- FLAT PACK « ----------------- LED INTEGRATED CIRCUITS LEAD CONFIGURATIONS AND CASE STYLES ARE TYPICAL, BUT MAY VARY DUE TO VENDOR CHANGES OR INSTRUMENT MODIFICATIONS.
Page 275: Locating Components On Schematic Diagrams And Circuit Board Illustrations
3. Locate the Component on the Schematic Diagram. 2. Determine the Circuit Number and Schematic Diagram. 2246 1Y and 2246 Mod A Service 1. Locate the Circuit Board Illustration. a. Locate the tabbed page that corresponds to the Schematic Diagram num...
Page 276 2. Determine the Circuit Number and Schematic Diagram. 3. Locate the Component on the Schematic Diagram. a. Locate the tabbed page that corresponds to the Schematic Diagram num c. In the SCHEM LOCATION column next to the component, read the grid a.
Page 277 TO ALL CH 1-CH2 VAR PROBE BLOCKS CHl-4 POS CODES TIME VAR FROM TRIG LEVELS D0-D7 BUS HOLDOFF FRONT-PANEL POTS (EXCEPT A INTEN. B INTEN. READOUT) 7062-05 Figure 9-4. Simplified 2246 1Y or 2246 Mod A block diagram. REV JUN 1991...
Page 278 Figure 9-5b. Detailed 2246 1Y or 2246 Mod A block diagram— part 2.
Page 279 CH 3 POS > D 0 -D 7 U 2 5 1 9 U 25 2 1 CH 2 POS CH 1 POS TRACE SEP Figure 9-5b. Detailed 2246 1Y or 2246 Mod A block diagram— part 2. 7062-07 REV JUN 1991...
Page 280: Signal Line Locations
2246 1Y and 2246 Mod A Service Table 9-1 SIGNAL LINE LOCATIONS GOES TO SIGNAL NAME ORIGINATES® DIAG/CIR#(VIA) DIAG/CIR#(VIA) 5/VR302 A GATE 4/U 603-11 4/U603-14 5/VR301 A GATE 4/Q604 9/U2410-9 A GATE T 11/U2312-14(R2357) 7/U1001-12 A INTEN 4/U602-17 7/Q1001 A INTEN GATE A RAMP 5/Q312.Q328...
Page 281 Table 9-1 (cont) ORIGINATES® GOES TO SIGNAL NAME DIAG/CIR#(VIA) DIAG/CIR#(VIA) 2/U220-2 1/U173-4 POT MUX CLK 2/U220-7 1/U122-8 REF CURSOR 2/U220-20 3/1)421-5,11431-5 REF DELAY 2/U220-10(R227) 11/U2309-5(R2351) RO BLANK 4/U600-37 2/U230-11 (R233) RO BUF RD 11/U2311-4(R2327) 2/U203-10 RO BUF WR 7/U506-1 1/R107.C131 RO CH 1 POS E 2/U230-2 1/U173-7...
Page 282 Table 9-1 (cont) SIGNAL NAME ORIGINATES® GOES TO DIAG/CIR#(VIA) DIAG/CIR#(VIA) 1/U173-4 2/U220-2 CH 2 PREAMP 1 CH 2 PREAMP IN + 1/U122-8 2/U220-7 CH 2 TR + 2/U220-20 3/U421-5.U431-5 2/U220-10(R227) CH 2 VAR 11/U2309-5(R2351) 4/U600-37 2/U 230-11(R233) CH 3 EN 2/U203-10 CH 3 POS 11 /U2311-4(R2327)
Page 283 Table 9-1 (cont) SIGNAL NAME ORIGINATES® GOES TO DIAG/CIR#(VIA) DIAG/CIR#(VIA) 8/U2517-13 11/U2313-11 POT MUX CLK REF CURSOR 11/U2304-14 9/U2414-5.U2415-5 REF DELAY 11/U2305-8 5/U301-13(R329) 9/U2410-16(R2419) RO BLANK 4/U600-12 RO BUF RD 8/U2501-2 9 (R2515) 9/U2402-1 8/U2501-28(R2516) 9/U2417-9.U2401-11 RO BUF WR RO CH 1 POS EN 9/U2403-19 2/U202-10 RO CH 2 POS EN...
Page 284 V O LT CAL CH 1 - 4 TR+ V A R - OR X <>> CH 2 V A R - DELAY L IN E + V E R TIC A L OUTPUT VERT OUTPUT IN P U T DRIVER DELAY L IN E PREAMP IN +...
Page 285 2246 1Y and 2246 Mod A Service Figure 9-5a. Detailed 2246 1Y or 2246 Mod A block diagram— part 1 (6557-93)7062-06 REV JUN 1991...
Page 286 VOLTAGE/WAVEFORM SETUP CONDITIONS supply, first connect the power cord of the WAVEFORMS 2246 1Y or 2246 Mod A under test through an isolation transformer, then connect probe Test waveforms are shown on a page just before the ground wire to ground “ P” (rear side of R2256).
Page 288 C 9 0 4 nqnfl 0905 R 9 0 .8 ; A D D J U N 1991 Figure 9-6a. A lO -M a ln board for SN B715000 and above (2246 1Y), and B12j0000 and above (2246 MOO A).
Page 289 R209 0 0 G R501 c OG W501 . . L462 " W25Q2/P2S02 : R470 R481 (O C D C 4 0O ..,. *-.h ilD C 5 Q 4 7 0 : i l fiC O C ■ - • y i u i LO cn cn R 2 4 2 L475...
Page 290 OTHER PARTS CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER J2726 FL2201 Static Sensitive Devices See Maintenance Section COMPONENT NUMBER EXAMPLE Component Number A 2 3 A 2 R 1 2 3 4 Schematic Assembly Circuit Number Subassembly Number...
Page 291 A 10-M AIN BOARD (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER...
Page 292 A10 —MAIN BOARD (cont) (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER...
Page 293 A10 —MAIN BOARD (cont) (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION...
Page 294 2246 1Y and 2246 Mod A Service A10 —MAIN BOARD (cont) (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM LOCATION LOCATION NUMBER NUMBER...
Page 295 A10 — MAIN BOARD (cont) (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER NUMBER...
Page 296 2246 1Y and 2246 Mod A Service A10 —MAIN BOARD (cont) (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT NUMBER NUMBER LOCATION NUMBER...
Page 297 c n > □ < to - tsw ze 1 3 £ zs to ' ■ tetjtt 3sta - i e i d m s i •a : ^ t / fr t r --ztM/ztr [>...
Page 298 C . R 209■ ■ R 4 7 3 I 4 6 2 ^ FJ * 5 0 :1 wSO i C 61 3 P«1 ; tT7t> P *5*; lap,. »9 U6C1 * 2 4 2 ; C D CO C O CO s L 4 7 S "s»-CO<Sl—...
Page 299 A10 —MAIN BOARD (SN B710100 to B714999, 22 461Y SN B110100 to B119999, 2246 MOD A) CIRCUIT SCHEM BOARD SCHEM BOARD CIRCUIT CIRCUIT SCHEM BOARD BOARD CIRCUIT SCHEM LOCATION LOCATION NUMBER NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER NUMBER NUMBER C463 C l 002 C224...
Page 300 A10 —MAIN BOARD (cont) (SN B710100 to B714999, 2246 1Y SN B110100 to B119999, 2246 MOD A) CIRCUIT SCHEM BOARD SCHEM BOARD CIRCUIT SCHEM BOARD SCHEM BOARD CIRCUIT CIRCUIT LOCATION LOCATION NUMBER NUMBER NUMBER LOCATION NUMBER NUMBER NUMBER LOCATION NUMBER...
Page 301 A10-M AIN BOARD (cont) (SN B710100 to B714999, 2246 1Y SN B110100 to B119999, 2246 MOD A) CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER NUMBER...
Page 302 A10-M AIN BOARD (cont) (SN B710100 to B714999, 2246 1Y SN B110100 to B119999, 2246 MOD A) CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM SCHEM BOARD BOARD NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER NUMBER LOCATION...
Page 303 2246 1Y and 2246 Mod A Service A10 —MAIN BOARD (cont) (SN B710100 to B714999.,2 2 4 6 1Y SN B110100 to B119999, 2246 MOD A) SCHEM CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT CIRCUIT BOARD SCHEM BOARD NUMBER NUMBER...
Page 304 A D D J U N 1991...
Page 305 2246 1Y and 2246 Mod A Service A10 —MAIN BOARD (cont) (SN B710100 to B714999. ,2 2 4 6 1Y SN B110100 to B119999, 2246 MOD A) BOARD CIRCUIT CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM SCHEM BOARD NUMBER...
Page 306 W 2 3 G 2 / P 2 3 0 2 C D C D D S 9 0 3 0 £ e (5555-80)7062-08 Figure 9-6c. A lO -M a in board for SN B710099 and below (2246 1Y), and B110099 and below (2246 MOD A). REV JUN 1991...
Page 307 A10 —MAIN BOARD (SN B710099 AND BELOW, 2246 1Y SN B110099 AND BELOW, 2246 MOD A) CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER...
Page 308 A10 —MAIN BOARD (cont) (SN B710099 AND BELOW, 2246 1Y SN B110099 AND BELOW, 2246 MOD A) CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER...
Page 309 A10 —MAIN BOARD (cont) (SN B710099 AND BELOW, 2246 1Y SN B110099 AND BELOW, 2246 MOD A) CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER...
Page 310 2246 1Y and 2246 Mod A Service A10 —MAIN BOARD (cont) (SN B 710099 AND BELOW, 224 6 1Y SN B 110099 AND BELOW, 2246 MOD A) CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER...
Page 311 2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 1 ■ ' : B f e I l i 6555-39...
Page 312: A9-2 Mv Bandwidth Board For Sn B700100
Figure 9-7. A9—2 mV Bandwidth board for SN B700100 to B714999 (2246 1Y), and SN B100100 to B119999 (2246 MOD A ). A9— 2 mV BANDWIDTH BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER C l 85...
Page 313 Figure 9-7. A9—2 mV Bandwidth board for SN B700100 to B714999 (2246 1Y), and SN B100100 to B119999 (2246 NOD A ). A9— 2 mV BANDWIDTH BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER C l 85...
Page 314 11 10 9 A T 117 A T I 27 1 4 5 6 6555-70 Figure 9-8. Hybrid pin identifiers.
Page 315 VER TIC A L INPUTS DIA G R A M 1 (SN B 710100 AND AB O VE, 2246 1Y SN B 110100 AND ABO VE, 2246 M O D A) ASSEMBLY A10 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT...
Page 316 H ~3l + 2.5V p R 1 0 4 ^ 8 .2 K J C104 ± . i o k (g :— v L - 2246 1Y AND 2246 MOD A REV JUNE 1991 7062-33...
Page 317 SCHEM BOARD LOCATION LOCATION...
Page 318 VERTICAL INPUTS DIAGRAM 1 (SN B710099 AND BELOW, 2246 1Y SN B110099 AND BELOW, 2246 MOD A) A S S E M B L Y A9 CIRCUIT SCHEM CIRCUIT BOARD SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION...
Page 321 2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 2 SET READOUT CONTROL CCW (OFF). 6555-40...
Page 322 VERTICAL PREAMPS AND OUTPUT AMPLIFIER DIAGRAM 2 (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) ASSEMBLY A10 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION...
Page 325 V ER TIC A L PREAM PS AND O U TP U T AM PLIFIER D IAG RAM 2 (SN B 714999 AND BELOW, 2246 1Y SN B 1 19999 AND BELOW, 2246 M O D A) ASSEMBLY A10 CIRCUIT...
Page 328 2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 3 SET HORIZONTAL MODE TO ALT. CONNECT 4 DIVISION COMPOSItr CONNECT 4-DIVISION COMPOSITE VIDEO SIQNAL SET TRIQQ1R MODE VIDEO SIGNAL. SET TRIGGER MODE TO TV FIELD. TO TV FIELD MORE...
Page 329 CONNECT 4-DIVISION COMPOSITE VIDEO SIGNAL. CONNECT 4-DIVISION COMPOSITE SET SLOPE TO A_ (NEGATIVE-GOING) FOR VIDEO SIGNAL. SET TRIGGER MODE BOTH 2245A AND TEST OSCILLOSCOPE. TO TV FIELD. ■ ■ i • ■ r — o v • ..£ ; s i L J r n i l —...
Page 330 A AND B TR IG G ER SYS TE M DIAG RAM 3 (SN B710100 AND ABO VE, 2246 1Y SN B110100 AND ABO VE, 2246 M O D A) ASSEMBLY A10 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM...
Page 332 SCHEM BOARD LOCATION LOCATION...
Page 333 A AND B TRIGGER SYSTEM DIAGRAM 3 (SN B710099 AND BELOW, 2246 1Y SN B110099 AND BELOW, 2246 MOD A) ASSEMBLY A10 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION...
Page 334 BTS 2 B TRIGGER COUPLING SELECTOR! S t a t i c S e n s i t i v e D e v i c e s See Maintenance Section 2246 1Y AND 2246 MOD A REV JUNE 1991 7062-16...
Page 335 BOARD SCHEM LOCATION LOCATION...
Page 336 2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 4 + 3.6 V SET SEC/DIV TO 20 M S. WAVEFORM VARIES WITH SETTING OF TRIGGER HOLDOFF CONTROL. SET A & B SEC/DIV TO 0.1 ms, READOUT CONTROL CCW (OFF), AND HORIZONTAL MODE TO ALT.
Page 338 DISPLAY AND TIR G G E R LOGIC AND P R O C E S S O R INTERFACE D IA G R A M 4 (SN B710100 AND ABO VE, 2246 1Y SN B110100 AND ABO VE, 2246 M O D A)
Page 339 - RO TR SEP EN T O U 2 0 1 - U < $ > 8C 10. 13. 16. 1. 21 U602 U604C 25. 28. 31 10116 ► TB CAL TO R1170 <§>3A U603 1. 16 U604 1. 16 U606 A10 i 2246 1Y AND 2246 MOD A -A________________________ A_...
Page 341 DISPLAY AND TIR G G ER LOGIC AND P R O C E S S O R INTERFACE DIA G R A M 4 (SN B710099 AND BELOW, 2246 1Y SN B 110099 AND BELOW, 2246 M O D A)
Page 342 RO TR SEP EN * RO TR SEP EN TO U 20 1 -1 * 8C - TB CAL TO R1170 3A <§> TB CAL 4 - U604C 10116 2246 1Y AND 2246 MOD A REV JUNE 1991 __________& ______________ &_...
Page 343 C l ]...
Page 344 2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 5 HORIZ MODE A, A SEC/DIV 2M S, HOLDOFF MIN (CCW)
Page 345 HORIZ MODE ALT, A SEC/DIV 2M s, B SEC/DIV HOLDOFF MIN, DELAY-INTENSIFIED ZONE STARTS MIDSCREEN...
Page 346 A AND B SWEEPS AND DELAY COMPARATORS DIAGRAM 5 ASSEMBLY A10 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C301 0328 R335 R382 C302 0329 R336 R383...
Page 347 BEV JUNE 1991 7062-18...
Page 348 SCHEM BOARD LOCATION LOCATION...
Page 349 2246 1Y and 2246 Mod A Service W A V E FO R M S FOR D IA G R A M 6 6555-43...
Page 350 HO RIZO NTAL O U TP U T AM PLIFIER DIAG RAM 6 (SN B710100 A N D ABO VE, 2246 1Y SN B110100 AND ABO VE, 2246 M O D A) ASSEMBLY A10 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD...
Page 351 CIRCUIT +15V +7.5V NUMBER U301 U801 U802 2246 1Y AND 2246 MOD A REV JUNE 1991 ° 7062-37...
Page 352 UB02 FOR INTEGRATED CIRCUIT SUPPLY CONNECTIONS AND POWER SUPPLY DECOUPLING NETWORKS SEE: MAIN BOARO POWER DISTRIBUTION ^ 2246 1Y AND 2246 MOD A SN B710100 AND ABOVE (2246 1Y) HORIZONTAL OUTPUT AMPLIFIER REV JUNE 1991 7062-37 SN B 1 10100 AND ABOVE (2246 MOD A) <t>...
Page 353 HORIZONTAL OUTPUT AMPLIFIER DIAGRAM 6 (SN B710099 AND BELOW, 2246 1Y SN B110099 AND BELOW, 2246 MOD A) ASSEMBLY A10 SCHEM BOARD BOARD CIRCUIT CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION...
Page 354 7062-19 2246 1Y AND 2246 MOD A REV JUNE 1991 _________A ---------------------- fc -- . A .
Page 355 BOARD LOCATION...
Page 356: A8-Crt Control Board
2246 1Y and 2246 Mod A Service D ______ I _____ E ______ i E _____ i W900 R903 R902 R901 Figure 9-9. A8—CRT Control board. Static Sensitive Devices See Maintenance Section COMPONENT NUMBER EXAMPLE Component Number A 2 3 A2 R 1 2 3 4 S c h e m a tic ♦...
Page 357 ____ H +0.62 V R905 (6081 32)7062-09 W A V E FO R M S FOR D IA G R A M 7 SET READOUT CONTROL CCW (OFF) AND A INTEN CONTROL CW (FULLY ON). SET READOUT CONTROL CCW (OFF) AND SET READOUT CONTROL CCW (OFF) AND A INTEN CONTROL CW (FULLY ON).
Page 358 Rt03 R90S (0081 32)7062-09 W A V E FO R M S FOR DIAGRAM 7 SET READOUT CONTROL CCW (OFF) AND A INTEN CONTROL CW (FULLY ON). SET READOUT CONTROL CCW (OFF) AND SET READOUT CONTROL CCW (OFF) AND A INTEN CONTROL CW (FULLY ON). A INTEN CONTROL CW (FULLY ON).
Page 359 + 0.62 V SET READOUT CONTROL CCW (OFF), SET READOUT CONTROL CCW (OFF) AND A INTEN CCW (OFF), B ENTEN CW (FULLY A INTEN CONTROL CW (FULLY ON). ON), AND HORIZONTAL MODE TO ALT. SET READOUT CONTROL CCW (OFF), A INTEN CCW (OFF), B ENTEN CW (FULLY ON), AND HORIZONTAL MODE TO ALT.
Page 360 Z-AXIS, CRT, PROBE ADJUST AND CONTROL MUX DIAGRAM 7 (SN B715000 AND ABOVE, 2246 1Y SN B120000 AND ABOVE, 2246 MOD A) ASSEMBLY A8 CIRCUIT SCI II M HOAMI) SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT ItK ;AII< IN...
Page 361 ^ ■ ■ H i i r r r g P2302A <r RO HORIZ - RO HORIZ TO R807 5B PROBE ADJUS1 RO VERT < - - RO VERT TO R207 7C A TRIG LVL < - A TRIG LVL TO W410 CONTROL MULTIPLEXER <...
Page 363 Z-AXIS, CRT, PROBE ADJUST AND CONTROL MUX DIAGRAM 7 (SN B714999 AND BELOW, 2246 1Y SN B119999 AND BELOW, 2246 MOD A) ASSEMBLY A8 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD LOCATION LOCATION LOCATION NUMBER...
Page 364 •*™ T PROBE P2302* < & > RO HORIZ TO R807 5B RO HORIZ <- CONTROL MULTIPLEXER no VERT <- RO VERT TO R207 7C < 2 ^ A TRIG LVL <- A TRIG LVL TO W410 B REF TRIG LVL B REF TRIG LVL TO U 1 106-3 R 9 38 <...
Page 365 SCHEM BOARD LOCATION LOCATION SCHEM BOARD LOCATION LOCATION SCHEM BOARD LOCATION LOCATION CHASSIS...
Page 366 2246 1Y and 2246 Mod A Service » » • e W . 40 C" fG > < P U2403 U2417 i C M C M C M C M : C M 't> f J 'O 'U «P CIRCUIT * a # * ^ «...
Page 367 *" o m m i/) < n ,tn c j in U2503 U2513 U2518 LO O tO — ID O — • O m in in in U2515 Static Sensitive Devices CM CM CM CM Maintenance Section OC U OC oc in 'fr —...
Page 368: A16-Processor Board
A16— -PROCESSOR BOARD CIRCUIT SCHEM SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER R2363 R2540 U2408 C2514 Q2506 BT2501 R2364 R2542 U2409 BT2502 C2515 Q2507 R2546 U2409 R2365 C2516...
Page 369 MEASUREMENT PROCESSOR DIAGRAM 8 ASSEMBLY A16 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION NUMBER LOCATION LOCATION LOCATION LOCATION NUMBER U2501 R2516 BT2501 U2502 R2517 BT2501 J2502 U2503A J2502 R2518 BT2502 U2503B R2519...
Page 370 1 ----- W V ----- -- RO BUF RD TO U 2402-1 6A <9> □RQO PCSB/A1 DRQ1 PC56/A2 £ R2518 U2503C CR2504 > L_9T- ^ 8 74LS32 POWER-ON RESET! DS2501 S 6 2 0 . A16 PROCESSOR BOARD I 2246 1Y AND 2246 MOD A REV JUNE 1991 7062-21 ________________A ----------------------------------------- A —...
Page 371 SCHEM BOARD LOCATION LOCATION...
Page 372 2246 1Y and 2246 Mod A Service W A V EFO R M S FOR D IA G R A M 9 MORE...
Page 373 (6555-72)6557-88...
Page 374 R E A D O U T SYS TE M D IAG RAM 9 ASSEMBLY A16 CIRCUIT SCHEM BOARD CIRCUIT BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION LOCATION LOCATION NUMBER C2411 R2404 R2420...
Page 376 SCHEM BOARD LOCATION LOCATION...
Page 377 2246 1Y and 2246 Mod A Service W2501/P2501 S20OI S2017 S2G33 S2006 S2022 S2038 S20IO S2026 S2042 S20I2 S203I 52002 U200I DS204I S2030 © S > DS2042 S20IB DS2026 DS2034 DS200I DS2003 DS2020 _ S2028 DS2023 S2034 DS2002 DS2004 DS202I...
Page 378: A14-Switch Board
A 14 — S W ITC H BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM © NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER C2001 DS2023 S2030 DS2025 R2001 S2031 CR2001 DS2026 R2002 S2033 CR2002 DS2027 S2034 CR2003 DS2028 S2001 S2035 CR2004...
Page 379 A 14— SW ITC H BOARD SCHEM CIRCUIT CIRCUIT SCHEM CIRCUIT SCHEM SCHEM CIRCUIT NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER 52030 DS2023 C2001 52031 R2001 DS2025 52033 R2002 DS2026 CR2001 52034 DS2027 CR2002 52035 S2001 DS2028 CR2003 52036 S2002 DS2029 CR2004...
Page 380 W A V E FO R M S FOR D IA G R A M 10...
Page 381 SWITCH BOARD AND INTERFACE DIAGRAM 10 ASSEMBLY A14 SCHEM BOARD BOARD CIRCUIT CIRCUIT SCHEM CIRCUIT SCHEIY BOARD BOARD CIRCUIT SCHEM LOCATION LOCATION LOCATION NUMBER LOCATION NUMBER LOCATION NUMBER LOCATIC LOCATION LOCATION NUMBER S2024 R2001 DS2025 CR2001 S2028 R2002 DS2026 CR2002 52030 DS2027 CR2003...
Page 382 \V 0L TS /D ivj L Vi S2033 nasoi [FRONT JANEL^.LEDS] |LAST M E A S ‘ Ml PROCESSOR BOARO I A 1 4 2246 1Y AND 2246 MOD A * > 6 2 -1 3 PARTIAL SWITCH BOARO |...
Page 383 SCHEM BOARD LOCATION LOCATION SCHEM BOARD LOCATION LOCATION...
Page 384 2246 1Y and 2246 Mod A Service J2I05 R2I06 R2II0 R2II2 < < ' W — ■ * — y— R2I02 R2I04 T — •r— C V i C N J R2I0I R2I03 R2I07 R2I05 R2I08 <noni ,*ri)ns».s Figure 9-12. A12— Potentiometer board.
Page 385: A12-Potentiometer Board
A12— POTENTIOMETER BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER J2105 R2104 R2110 J2105 R2105 R2111 R2106 R2112 R2101 R2107 R2113 R2102 R2108 R2103 R2109 -2 .5...
Page 386 A12— POTENTIOMETER BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER J2105 R2104 R2110 J2105 R2105 R2111 R2106 R2112 R2101 R2107 R2113 R2102 R2108 R2103 R2109 A12— POTENTIOMETER BOARD...
Page 387 WAVEFORMS FOR DIAGRAM 11 (6555-73)6557-48...
Page 388 A D C , DAC SYSTEM DIAG RAM 11 ASSEMBLY A12 BOARD BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM BOARD SCHEM BOARD CIRCUIT LOCATION LOCATION LOCATION LOCATION NUMBER LOCATION NUMBER LOCATION NUMBER LOCATION LOCATION NUMBER R2111B R2108 R2104 J2105 R2112 R2109 R2105 R2113A...
Page 389 DECOUPLING NETWORKS SEE: PROCESSOR BOARD POWER DISTRIBUTION <$J> R2318 < 2 .9 4 K > - 2 .5 V P -2.5Vp A 1 6 PARTIAL PROCESSOR BOARD 7 062-2 4 2246 1Y AND 2246 MOD A REV JUNE 1991 —A______________________________A -...
Page 390 SCHEM BOARD LOCATION LOCATION SCHEM BOARD LOCATION LOCATION...
Page 391 2246 1Y and 2246 Mod A Service R2252 CR2204 R223I CR2205 C22I6 I22R 8 2243 R2250 [ R222I R2238 R225B Q22II R2232 R2273 C22I0 R2222 L2206 R2239 R2254 T2205 VR220Z R2225 VR2204 C22I9 CR2227 R2224 R2220 02204 C2244 R2242 VR2205...
Page 392 '© R223I « n w r * % R225S R2273 C22I0 L2206 T2203 R2234 CR2227 C2244 R2242 CR2236 ReZ7« J» T ... ! C2243 « ) OtIIC) C2248 R2266 R226? DS220I T2204 R2259 C2221 U2230 c u ts L?Z01 C2229 C2228 C2226 €2232...
Page 393: A18-Power Supply Board
A18—POWER SUPPLY BOARD CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM CIRCUIT SCHEM NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER C2201 CR2209 Q2211 R2252 C2202 CR2210 Q2212 R2253 C2203 CR2211 Q2213 R2254 C2204 Q2214 CR2212 R2255 C2206 CR2213 R2256 C2207 CR2214 R2257 R2201 C2208...
Page 394 2246 1Y and 2246 Mod A Service W A V E FO R M S FOR DIAGRAM 12 — f * '“ I S ®<*1 »? 4 £ f c i...
Page 395 2246 1Y and 2246 Mod A Service W A V EFO R M S FOR D IA G R A M 12 (co n t)
Page 396 POWER SUPPLY DIAGRAM 12 ASSEMBLY A18 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT LOCATION LOCATION LOCATION LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER NUMBER LOCATION NUMBER 02211 R2252 C2201 CR2209 R2253 CR2210 Q2212 C2202 02213 R2254 C2203 CR2211 R2255...
Page 399: Main Board
M AIN BOARD PO W ER D ISTRIBUTIO N DIA G R A M 13 (SN B 710100 AND ABOVE, 2246 1Y SN B 110100 AND ABOVE, 2246 M O D A) ASSEMBLY A8 CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD...
Page 400 7062-39 REV JUNE 1991...
Page 402 MAIN BOARD PO W ER D ISTRIBUTIO N DIA G R A M 13 (SN B 710099 AND BELOW, 2246 1Y SN B 1 10099 AND BELOW, 2246 M O D A) ASSEMBLY A8 SCHEM CIRCUIT SCHEM BOARD CIRCUIT BOARD...
Page 405 P R O C E SS O R BO ARD PO W ER DIS TR IB U TIO N D IAG RAM 14 ASSEMBLY A12 BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION...
Page 406 2246 IV AND 2246 MOD A...
Page 409: Ns Timing
DELAY LINE HF COMP 2246 1Y and 2246 Mod A Service R231 R241 R455 CH 3 GAIN CH 4 GAIN R275 C274 C273 R272 R273 B TRIG BANDWIDTH ATTENUATOR COMPENSATION ADJUSTMENTS CHANNEL 1 C l— MF/LF COMP CIO— INPUT COMP X I00 C l 1—...
Page 410 Detail Part o f Assembly and/or Component Attaching parts for Detail Part If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or END ATTACHING PARTS representative will contact you concerning any change in part number.
Page 411 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. City, State, Zip Code Address Code Manufacturer Summerset NJ 08873 72 Veronica Ave S3109 FELLER Unit 4 BERKELEY CA 94170 S3629...
Page 412 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. Code Manufacturer Address City, State, Zip Code >8189 ILLINOIS TOOL WORKS INC ST CHARLES ROAD ELGIN IL 60120 SHAKEPROOF DIV 80009...
Page 413 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Index Tektronix Serial No. Mfr. Effective Dscont 12345 Name & Description Part No. Code Mfr. Part No. 334-6445-00 MlAAkER.IDENTMKD TEKTRONIX 2246 07416 £ r d er by d e 437-0390-00 CABINET ASSY:390-1057-00 W/FEET &...
Page 414 ©_...
Page 415 2246 1Y/2246 MOD A...
Page 417 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service F ig . Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 334-6446-00 MARKEft,IDENT:MKD TEKTRONIX 2246 07416 r d e r by d e s c...
Page 418 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Mfr. Index Tektronix Serial No. Code Mfr. Part No. Effective Dscont 12345 Name & Description Part No. 0J9P9 ORDER BY DESd SHIELD,ELEd:CRT,REAR 337-3411-00 B100100 B114611 (2246 MOD A,2Y)
Page 419 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Mfr. Serial No. Index Tektronix Code Mfr. Part No. Effective Dscont 12345 Name & Description Part No. CIRCUIT BD ASSY:POTENTIOM ETER (SEE A12) 83014 3P-32-4-1 214-3826-00 LATCH,PLUNGER:BLACK GROMMET,FSTNR:0.187 DIA,BLACK...
Page 420 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Mfr. Tektronix Serial No. Index Code Mfr. Part No. Effective Dscont 12345 Name & Description Part No. .TRANSISTOR: (SEE A18Q22l4 ATTACHING PARTS .SCREW,TPG,TR:6-32 X 0.437 TAPTITE.PNH.STL 0KB01 ORDER BY DESC...
Page 421 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Tektronix Serial No. Index Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. B100100 131-3960-00 B110494 .CONTACT,ELEC:BNC GROUNb.Cll-BE ALLOY TK2147 ORDER BY DESC .(2246 MOD A,2Y)
Page 422 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10-10 REV OCT 1991...
Page 423 2246 1Y/2246 MOD A...
Page 424 2246 1Y/2246 MOD A...
Page 426 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Tektronix Serial No. Mfr. Index Code Mfr. Part No. Effective Dscont 12345 Name & Description Part No. STANDARD ACCESSORIES TK2432 ORDER BY DESC 161-0230-01 CABLE ASSY,PWR,:3,18 AWG,92.0 L...
Page 427 Replaceable Mechanical Parts 2246 1Y and 2246 MOD A Service Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10-12 REV OCT 1991...
Page 428 MANUAL CHANGE INFORMATION At Tektronix, we continually strive to keep up with latest electronic developments by adding circuit and component improvements to our instruments as soon as they are developed and tested. Sometimes, due to printing and shipping requirements, we can’t get these changes immediately into printed manuals.
Page 429 5-13-91 Change Reference: M73903_______ committed to excellence Product: 2246 1Y and 2246 MOD A SERVICE MANUAL___________ Manual Part Number: 070-7062-00 D ES C R IP TIO N Product Group 46 E FFE C TIV E SER IA L NU M BER: B715003 (1Y, 2R)
Page 430 070-7062-00 _______________________ ,_______________________ D E S C R IP TIO N _________________________ Product Group E FFE C TIVE SER IA L NUM BER: B715476 (2246 1Y, 2R) B121427 (2246 M O D A, 2Y, 9X) REPLACEABLE ELECTRICAL PARTS LIST CHANGES...
Page 431 Tektronix m a n u a l c h a n g e in f o r m a t io n Date: 9~23“91 Chanae Reference: C l 1/0991 c o m m it t e d t o e x c e l l e n c e...
Page 432 Tektronix manual change information coMMrrreo Date: 9-25-91 Change Reference: C l 2/0991______ to excellen ce Product: 2246 Mod A / 1Y SERVICE____________________________ Manual Part Number: 070-7062-00 D E S C R IP T IO N Product Group E FFE C TIVE ALL SER IA L NU M B ER S...

This manual is also suitable for:

2246 2r 2246 mod a

Tektronix 2246 1Y Service Manual

Quick Links

Troubleshooting

Related Manuals for Tektronix 2246 1Y

Summary of Contents for Tektronix 2246 1Y

This manual is also suitable for:

Table of Contents