Tektronix TM 502A User manual

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Instruction Manual
Tektronix
/
TM502A
Power Module
070-6502-01
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to the Safety Summary prior to
performing service.
Pleasecheckforchangeinformationat the rear
ofthismanual.
First Printing: January I993
Revised Printing: December 1993

Instrument Serial Numbers
Each instrument manufactured by Tektronix has a serial number on a panel insert or tag, or stamped on the
chassis. The first letter in the serial number designates the country of manufacture. The last five digits of the
serial number are assigned sequentially and are unique to each instrument. Those manufactured in the
United States have six unique digits. The country of manufacture is identified as follows:
B010000
E200000
J300000
H700000
Tektronix, Inc., Beaverton, Oregon, USA
Tektronix United Kingdom, Ltd., London
Sony/Tektronix, Japan
Tektronix Holland, NV,Heerenveen, The Netherlands
Instruments manufactured for Tektronix by external vendors outside the United States are assigned a two digit
alpha code to identify the country of manufacture (e.g., JP for Japan, HK for Hong Kong, ILfor Israel, etc.).
Tektronix, Inc., P.O.Box 500, Beaverton, OR 97077
Printed in U.S.A.
Copyright © Tektronix, Inc., 1993. All rights reserved. Tektronix products are covered by U.S. and foreign
patents, issued and pending. The following are registered trademarks: TEKTRONIX, TEK, TEKPROBE, and
SCOPE-MOBILE.
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WARRANTY
Tektronixwarrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the
date of shipment. Ifany 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.
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. Tektronixshall 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; or c) 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 BYTEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESSED 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 .

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Specification
Operating Instructions
Maintenance
TM 502A Instruction Manual
Contents
Operators Safety Summary .................................. .
Service Safety Summary .................................... .
Specification ............................................... .
Instrument Description .................................. .
Performance Conditions ................................. .
Operating Instructions ...................................... .
Power Source .......•...................................
Power Usage/ Loading Considerations ................... .
Line Voltage Selection/Fuse Replacement ................ .
Handleffilt Stand Installation ............................ .
Operating Temperature .................................. .
Power Modules .......•..................................
Family Compatibility .••..................................
Module Installation ....•..................................
Plug-in Retainer Clip Information ....................... .
Power-on Procedure .................................. .
Maintenance ..........•.....................................
Static Sensitive Components ............................ .
Cleaning ............................................... .
Obtaining Replacement Parts ............................ .
Preventive Maintenance and Calibration .................. .
Soldering Techniques ................................... .
Removing the Cabinet ................................... .
Removing the Circuit Board ............................. .
Removing the Voltage Selector/Fuse Holder Assembly .... .
Replacing the Series Pass Transistor ..................... .
Packaging information .................................. .
iii
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1-1
1-1
1-1
2-1
2-1
2-1
2-1
2-3
2-4
2-4
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2-5
2-5
3-1
3-1
3-2
3-3
3-3
3-4
3-4
3-4
3-5
3-5
3-6
i

Options
Replaceable Electrical Parts
Diagrams and Circuit Board Illustrations
Symbols ...••...........................................
Component Values ...................................... .
Graphic Items and Special Symbols Used in This Manual .. .
Component Locator Diagrams ........................... .
Replaceable Mechanical Parts
Index
6-1
6-1
6-2
6-2
ii Contents
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Symbols and Terms
TM 502A Instruction Manual
Operators Safety Summary
Pleasetake a moment to review these safety precautions. They are provided
for your protection and to prevent damage to the power module. This safety
information applies to all operators and service personnel.
These two terms appear in manuals:
• ~ statements identify conditions or practices that could result in
damage to the equipment or other property .
• IwARNtNGIstatements identify conditions or practices that could result in
personal injury or loss of life.
These two terms appear on equipment:
• CAUTIONindicates a personal injury hazard not immediately accessible
as one reads the marking, or a hazard to property including the equip-
ment itself.
• DANGERindicates a personal injury hazard immediately accessible as
one reads the marking .
This symbol appears in manuals:
®
Static-Sensitive Devices
These symbols appear on equipment:
DANGER
High Voltage Protective ground (earth)
terminal
This symbol indicates where
applicable cautionary or other
information is to be found .
ATTENTION
Referto
manual
iii

Specific Precautions
iv
Observe all of these precautions to ensure your personal safety and to
prevent damage to either the power module or equipment connected to it.
Power Source
The power module is intended to operate from a power source that will not
apply more than 250 Vrms between the supply conductors or between either
supply conductor and ground. A protective ground connection, through the
grounding conductor in the power cord, is essential for safe system opera-
tion.
Grounding the Power Module
The power module is grounded through the power cord. To avoid electric
shock, plug the power cord into a properly wired receptacle where earth
ground has been verified by a qualified service person. Do this before mak-
ing connections to the input or output terminals of the power module.
Without the protective ground connection, all parts of the power module are
potential shock hazards. This includes knobs and controls that may appear
to be insulators.
Use the Proper Power Cord
Use only the power cord and connector specified for your product. Use only
a power cord that is in good condition.
Use the Proper Fuse
Toavoid fire hazard, use only the fuse specified in the parts list for your
product, matched by type, voltage rating, and current rating.
Do Not Remove Covers or Panels
Toavoid personal injury, do not operate the power module without the
panels or covers.
Take Antistatic Precautions
Wear an antistatic grounding wrist strap when working with the input con-
nectors on the power module.
Do Not Operate in Explosive Atmospheres
The power module provides no explosion protection from static discharges
or arcing components. Do not operate the power module in an atmosphere
of explosive gases.
Safety
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• TM 502A Instruction Manual
Service Safety Summary
For Qualified Service Personnel Only
Refer also to the preceding Operators Safety Summary
Do Not Service Alone
Do not perform internal service or adjustment of this product unless another
person capable of rendering first aid and resuscitation is present.
Use Care When Servicing With Power On
Dangerous voltages may exist at several points in this product. Toavoid
personal injury, do not touch exposed connections and components while
power is on.
Disconnect power before removing protective panels, soldering, or replacing
components .
Power Source
The power module is intended to operate from a power source that will not
apply more than 250 Vrms between the supply conductors or between either
supply conductor and ground. A protective ground connection, through the
grounding conductor in the power cord, is essential for safe system opera-
tion.
V

vi Safety
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