Equipment information:

Tektronix 2235 Oscilloscope
Manufacturer:
Tektronix
Model: 2235
Date: 1983
Category: Measurement instruments
Group: Oscilloscope
Description:
Information:
                                    The TEKTRONIX 2235 oscilloscope is a rugged, lightweight,
dual-channel, 100-MHz instrument that features a bright,
sharply defined trace on an 80- by 100-mm cathode-ray tube
(crt). Its vertical system provides calibrated deflection
factors from 2 mV per division to 5 V per division.
Trigger circuits enable stable triggering over the full
bandwidth of the vertical system. The horizontal system
provides calibrated sweep speeds from 0.5 s per division to
50 ns per division along with delayed-sweep features for
accurate relative-time measurements. A X10 magnifier extends
the maximum sweep speed to 5 ns per division.

These manuals are available for the above equipment:

Tektronix -- 2235 -- Service and User Manual
File name: Tektronix-4495-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 229
Size: 54.46 Mbytes (57103053 Bytes)
Language: english
Revision: Revised
Manual-ID/Number: 070-4206-00
Date: May 1983
Quality: Scanned document, all readable.
Upload date:
MD5: c7925be4f58e3abe6b43dfb694abbdae
ed2kID: ddfd3a4989a571386800827826de6f3c
Downloads: 885 since 15 April 2013
Information:
LIST OF ILLUSTRATIONS ........................................ni

LIST OF TABLES ......................................................iii

OPERATORS SAFETY SUMMARY ..........................i v

SERVICING SAFETY SUMMARY..............................v

SECTION 1 SPECIFICATION

INTRODUCTION ................................1-1

ACCESSORIES..................................1-1

PERFORMANCE CONDITIONS ________1-1

SECTION 2 OPERATING INSTRUCTIONS

PREPARATION FOR USE ................2-1

SAFETY ........................................2-1

LINE VOLTAGE ............................2-1

POWER CORD..............................2-1

LINE FUSE ....................................2-1

INSTRUMENT COOLING..............2-2

CONTROLS, CONNECTORS, AND

INDICATORS......................................2-2

POWER, DISPLAY, AND PROBE

ADJUST ........................................2-2

VERTICAL ....................................2-3

HORIZONTAL................................2-4

TRIGGER ......................................2-6

REAR PANEL ................................2-7

OPERATING CONSIDERATIONS ...	2-8

GRATICULE ..................................2-8

GROUNDING ................................2-8

SIGNAL CONNECTIONS ..............2-8

INPUT COUPLING CAPACITOR

PRECHARGING ............................2-8

OPERATOR’S ADJUSTMENTS ________2-9

INTRODUCTION ..........................2-9

TRACE ROTATION........................2-9

PROBE COMPENSATION ............2-9

OSCILLOSCOPE DISPLAYS ............2-10

INTRODUCTION ..........................2-10

BASELINE TRACE........................2-10

SIGNAL DISPLAY ........................2-11

MAGNIFIED-SWEEP DISPLAY ..	2-11

DELAYED-SWEEP DISPLAY ________2-11

DELAYED-SWEEP

MEASUREMENTS ........................2-11

SINGLE-SWEEP DISPLAY............2-12

X-Y DISPLAY ................................2-12

TV SIGNAL DISPLAYS ................2-12
SECTION 3 THEORY OF OPERATION

INTRODUCTION ................................3-1

GENERAL DESCRIPTION ................3-2

DETAILED CIRCUIT DESCRIPTION	3-3

VERTICAL ATTENUATORS ..........3-3

Input Coupling ..........................3-3

Buffer Amplifier and Gain

Switching Network....................3-4

Paraphase Amplifier..................3-4

VERTICAL PREAMPLIFIERS ...	3-5 CHANNEL SWITCH AND

VERTICAL OUTPUT ....................3-5

Delay Line Driver ......................3-6

Vertical Output Amplifier ..........3-6

A/B Sweep Separation Circuit .	3-7 TRIGGER AMPLIFIERS AND

SWITCHING ..................................3-7

Internal Trigger..........................3-7

Internal Trigger Amplifier ..........3-8

A External Trigger Amplifier ...	3-8

Line Trigger Amplifier................3-8

A TRIGGER GENERATOR............3-9

A Trigger Level Circuit ..............3-9

A Trigger Level Comparator . .	3-9 A Schmitt Trigger and TV

Trigger Circuit ..........................3-9

A SWEEP GENERATOR AND

LOGIC............................................3-9

A Miller Sweep Generator ....	3-10

A Sweep Logic ........................3-11

ALTERNATE B SWEEP ................3-11

B Miller Sweep Generator ....	3-12

B Trigger Level Comparator . .	3-12

Runs After Delay ......................3-12

B Delay Time Position

Comparator ..............................3-12

B Sweep Logic ........................3-12

Alternate Display Switching

Logic ........................................3-13

B Z-Axis Logic ..........................3-13

HORIZONTAL................................3-13

Horizontal Preamplifier..............3-14

X-Y Amplifier ............................3-14

Horizontal Output Amplifier ...	3-15

Z-AXIS AMPLIFIER ......................3-15

Dc Restor
SECTION 3 THEORY OF OPERATION (cont)

POWER SUPPLY AND PROBE

ADJUST ........................................3-17

Power Input ..............................3-17

Preregulator ..............................3-17

Inverter......................................3-18

Crt Supply ................................3-18

Focus Circuit ............................3-18

Low-Voltage Supplies ..............3-19

Probe Adjust ............................3-19

SECTION 4 PERFORMANCE CHECK PROCEDURE

INTRODUCTION ................................4-1

PURPOSE ....................................4-1

STRUCTURE ................................4-1

TEST EQUIPMENT ......................4-1

LIMITS AND TOLERANCES ________4-1

PREPARATION FOR CHECKS . .	4-2 INTRODUCTION TO

PERFORMANCE CHECK STEPS	4-3

VERTICAL ....................................4-4

HORIZONTAL................................4-8

TRIGGER ......................................4-12

EXTERNAL Z-AXIS AND PROBE

ADJUST ........................................4-15

SECTION 5 ADJUSTMENT PROCEDURE

INTRODUCTION ................................5-1

PURPOSE ....................................5-1

STRUCTURE ................................5-1

TEST EQUIPMENT ......................5-1

LIMITS AND TOLERANCES ________5-1

ADJUSTMENT INTERACTION . .	5-1 PREPARATION FOR

ADJUSTMENT ..............................5-1

INDEX TO ADJUSTMENT

PROCEDURE STEPS ..................5-3

POWER SUPPLY AND CRT DISPLAY	5-4

VERTICAL..........................................5-6

HORIZONTAL ....................................5-14

TRIGGER ..........................................5-20

EXTERNAL Z-AXIS AND PROBE

ADJUST ............................................5-24

SECTION 6 MAINTENANCE

STATIC-SENSITIVE COMPONENTS 6-1 PREVENTIVE MAINTENANCE ..... 6-2
Page
SECTION 6 MAINTENANCE (cont)

INTRODUCTION ..........................6-2

GENERAL CARE ..........................6-2

INSPECTION AND CLEANING . .	6-2

LUBRICATION ..............................6-4

SEMICONDUCTOR CHECKS ...	6-4

PERIODIC READJUSTMENT ...	6-4

TROUBLESHOOTING........................6-5

INTRODUCTION ..........................6-5

TROUBLESHOOTING AIDS ________6-5

TROUBLESHOOTING

EQUIPMENT ................................6-6

TROUBLESHOOTING

TECHNIQUES ..............................6-6

CORRECTIVE MAINTENANCE ________6-10

INTRODUCTION ..........................6-10

MAINTENANCE PRECAUTIONS .	6-10 OBTAINING REPLACEMENT

PARTS ..........................................6-10

MAINTENANCE AIDS ..................6-10

INTERCONNECTIONS ..................6-10

TRANSISTORS AND

INTEGRATED CIRCUITS ..............6-11

SOLDERING TECHNIQUES ....	6-12 REMOVAL AND REPLACEMENT

INSTRUCTIONS ............................6-13

Cabinet......................................6-13

Cathode-Ray Tube....................6-13

Power-Supply Shield ................6-14

Filter Circuit Board....................6-14

Alt Sweep Circuit Board ..........6-15

Attenuator Circuit Board ..........6-15

Timing Circuit Board ................6-16

Bottom Shield, Attenuator and

Timing Circuit-Board Module ..	6-17

Front-Panel Circuit Board ....	6-17

Main Circuit Board....................6-18

REPACKAGING FOR SHIPMENT	6-20

SELECTABLE COMPONENTS . .	6-20
SECTION 7 OPTIONS

SECTION 8 REPLACEABLE ELECTRICAL PARTS SECTION 9 DIAGRAMS

SECTION 10 REPLACEABLE MECHANICAL PARTS

Accessories

CHANGE INFORMATION
Tektronix-4495-Manual-Page-1-Picture
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