Tektronix 1741C Manual de usuario

1741C

Waveform Monitor

ZZZ

Service Manual

*P077015502*

077-0155-02

1741C

Waveform Monitor

ZZZ

Service Manual

Warning

The servicing instructions are for use by qualiﬁed personnel

only. To avoid personal injury, do not perform any servicing

unless you are qualiﬁed to do so. Refer to all safety summaries

prior to performing service.

Revision A

www.tektronix.com

077-0155-02

or suppliers, and are protected by national copyright laws and international treaty provisions.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication

supersedes that in all previously published material. Speciﬁcations and price change privileges reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

Contacting Tektronix

Tektronix, Inc.

14150 SW Karl Braun Drive

P.O. Box 500

Beaverton, OR 97077

USA

For product information, sales, service, and technical support:

In North America, call 1-800-833-9200.

Worldwide, visit www.tektronix.com to ﬁnd contacts in your area.

Warranty

Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)

year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its

option, either will repair the defective product without charge for parts and labor, or will provide a replacement

in exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty

work may be new or reconditioned to like new performance. All replaced parts, modules and products become

the property of Tektronix.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of

the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible

for packaging and shipping the defective product to the service center designated by Tektronix, with shipping

charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within

the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping

charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate

maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage

resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;

b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage

or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modiﬁed or

integrated with other products when the effect of such modiﬁcation or integration increases the time or difﬁculty

of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY

OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY

IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE

AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.

TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,

OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS

ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

[W2 – 15AUG04]

Table of Contents

General Safety Summary .......................................................................................... v

Service Safety Summary......................................................................................... vii

Preface.............................................................................................................. ix

Manual Conventions.......................................................................................... ix

Related Manuals ............................................................................................... x

Introduction

Introduction ....................................................................................................... 1-1

Service Strategy.............................................................................................. 1-1

Speciﬁcations................................................................................................. 1-1

Performance Veriﬁcation.................................................................................... 1-1

Options and Accessories.................................................................................... 1-1

Conﬁgurations................................................................................................ 1-1

Hardware Installation........................................................................................ 1-2

Product Upgrade............................................................................................. 1-2

Operating Information....................................................................................... 1-2

Theory of Operation

Theory of Operation.............................................................................................. 2-1

Main Board................................................................................................... 2-3

Front Panel ................................................................................................... 2-4

Composite Input ............................................................................................. 2-4

Fan Control................................................................................................... 2-4

Power Supply and Distribution............................................................................. 2-4

Adjustment Procedures

Adjustments....................................................................................................... 3-1

Required Equipment......................................................................................... 3-1

Procedures.................................................................................................... 3-2

Maintenance

General Maintenance............................................................................................. 4-1

Preventing ESD.............................................................................................. 4-1

Inspection and Cleaning..................................................................................... 4-2

Troubleshooting.............................................................................................. 4-5

Detailed Troubleshooting Procedures ..................................................................... 4-9

1741C Waveform Monitor Service Manual i

Table of Contents

Removal and Replacement Procedures ...................................................................... 4-16

Preparation.................................................................................................. 4-16

Module Removal........................................................................................... 4-17

Repackaging Instructions...................................................................................... 4-24

Packaging................................................................................................... 4-24

Shipping to the Service Center........................................................................... 4-24

Replaceable Parts

Replaceable Parts................................................................................................. 5-1

Parts Ordering Information ................................................................................. 5-1

Using the Replaceable Parts Lists.......................................................................... 5-2

ii 1741C Waveform Monitor Service Manual

List of Figures

Figure 2-1: Main block diagram................................................................................ 2-2

Figure 4-1: Main board power supply test points and LEDs .............................................. 4-15

Figure 4-2: Front panel cable connections................................................................... 4-20

Figure 4-3: Front panel disassembly ......................................................................... 4-21

Figure 4-4: LCD assembly bracket and backlight lock .................................................... 4-22

Figure 4-5: Backlight removal................................................................................ 4-23

Figure 5-1: Circuit boards and connectors..................................................................... 5-4

Figure 5-2: Chassis components................................................................................ 5-7

Figure 5-3: Main board replaceable components ............................................................. 5-9

1741C Waveform Monitor Service Manual iii

Table of Contents

List of Tables

Table i: Related documentation................................................................................... x

Table 3-1: Required equipment for adjustment ............................................................... 3-1

Table 4-1: External inspection check list ...................................................................... 4-3

Table 4-2: Internal inspection check list ....................................................................... 4-3

Table 4-3: Required test equipment ............................................................................ 4-6

Table 4-4: Symptoms and causes............................................................................... 4-6

Table 4-5: Main board secondary supplies .................................................................. 4-12

Table 4-6: Advanced diagnostic measurements............................................................. 4-14

Table 4-7: Tools required for module removal.............................................................. 4-16

Table 4-8: Module removal ................................................................................... 4-17

Table 5-1: Replaceable parts list (See Figure 5-1.) ........................................................... 5-2

Table 5-2: Chassis components (See Figure 5-2.) ............................................................ 5-5

Table 5-3: Replaceable parts list (See Figure 5-3.) ........................................................... 5-8

Table 5-4: Replaceable parts list.............................................................................. 5-10

iv 1741C Waveform Monitor Service Manual

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