Tektronix TG700 User manual

xx
TG700
TV Signal Generator Platform
ZZZ
Service Manual
*P077023005*
077-0230-05

TG700
TV Signal Generator Platform
ZZZ
Service Manual
xx
www.tektronix.com
077-0230-05

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
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 ........................................................................................ xiii
Service Safety Summary.......................................................................................... xv
Preface............................................................................................................ xvii
Manual Structure............................................................................................ xvii
Manual Conventions....................................................................................... xviii
Finding Other Information.................................................................................. xix
Introduction ........................................................................................................ xx
Performance Check Interval................................................................................. xx
Strategy for Servicing ........................................................................................ xx
Tektronix Service Offerings ................................................................................ xxi
Maintenance for Generators and Modules.................................................................... xxii
Preparation................................................................................................... xxii
Inspection and Cleaning................................................................................... xxiv
Repackaging Instructions .................................................................................. xxv
TG700 Platform
TG700 Mainframe Theory of Operation....................................................................... 1-1
A10 Main Board ............................................................................................. 1-1
Power Supply Module....................................................................................... 1-2
TG700 Adjustment Procedures ................................................................................. 1-3
Requirement for Adjustment ............................................................................... 1-3
Equipment Required......................................................................................... 1-3
Master Clock Frequency Adjustment...................................................................... 1-4
TG700 Mainframe Maintenance................................................................................ 1-5
Related Maintenance Procedures .......................................................................... 1-5
Preparation.................................................................................................... 1-6
Inspection and Cleaning..................................................................................... 1-6
TG700 Mainframe Removal and Installation Procedures.................................................. 1-10
Preparation.................................................................................................. 1-10
Access Procedure .......................................................................................... 1-15
Procedures for External Modules ........................................................................ 1-15
Procedure for Internal Modules .......................................................................... 1-20
TG700 Mainframe Troubleshooting.......................................................................... 1-24
Diagnostics ................................................................................................. 1-24
Troubleshooting Trees..................................................................................... 1-25
TG700 Mainframe Diagrams.................................................................................. 1-28
TG700 Mainframe Replaceable Parts List................................................................... 1-31
Parts Ordering Information ............................................................................... 1-31
TG700 TV Signal Generator Platform Service Manual i

Table of Contents
Using the Replaceable Parts List......................................................................... 1-32
Removing a Module............................................................................................ 1-41
AG7 Audio Generator
AG7 Audio Generator Theory of Operation................................................................... 2-1
AG7 Audio Generator Maintenance............................................................................ 2-2
AG7 Audio Generator Removal and Replacement ........................................................... 2-3
Tools Required ............................................................................................... 2-3
Replacing the Rear-Panel Connectors and Chassis ...................................................... 2-3
AG7 Audio Generator Troubleshooting........................................................................ 2-5
Equipment Required......................................................................................... 2-5
Backing Up the Instrument Settings ............ .......... .......... .......... .......... ................... 2-5
Troubleshooting Trees....................................................................................... 2-6
AG7 Audio Generator Diagram................................................................................. 2-8
AG7 Audio Generator Replaceable Parts List................................................................. 2-9
AGL7 Analog Genlock Module
AGL7 Analog Genlock Module Theory of Operation........................................................ 3-1
Analog Genlock.............................................................................................. 3-1
Black Burst Generator....................................................................................... 3-1
AGL7 Analog Genlock Adjustment Procedures .............................................................. 3-3
Requirements for Adjustment .............................................................................. 3-3
Equipment Required......................................................................................... 3-3
Output Offset and Gain Adjustment....................................................................... 3-4
Clock Timing Adjustment (Board Number 671-B089-XX and 671-B279-00 Only).. ............... 3-7
AGL7 Analog Genlock Module Maintenance............................................................... 3-11
AGL7 Analog Genlock Module Removal and Replacement .............................................. 3-12
Tools Required ............................................................................................. 3-12
Replacing the Rear-Panel Connectors and Chassis .................................................... 3-12
AGL7 Analog Genlock Module Troubleshooting .......................................................... 3-14
Equipment Required....................................................................................... 3-14
Backing Up the Instrument Settings .. .......... .......................... .......... ..................... 3-14
Troubleshooting Trees..................................................................................... 3-15
ii TG700 TV Signal Generator Platform Service Manual

Table of Contents
AGL7 Analog Genlock Module Diagram ................................................................... 3-17
AGL7 Analog Generator Module Replaceable Parts List.................................................. 3-18
ATG7 Analog Test Generator
ATG7 Analog Test Generator Theory of Operation .......................................................... 4-1
ATG7 Analog Test Generator Maintenance ................................................................... 4-2
ATG7 Analog Test Generator Removal and Replacement................................................... 4-3
Tools Required............................................................................................... 4-3
Replacing the Rear-Panel Connectors and Chassis ...................................................... 4-3
ATG7 Analog Test Generator Troubleshooting ............................................................... 4-5
Equipment Required......................................................................................... 4-5
Backing Up the Instrument Settings ................ ................................................ ....... 4-5
Troubleshooting Trees....................................................................................... 4-6
ATG7 Analog Test Generator Diagram ........................................................................ 4-8
ATG7 Analog Test Generator Replaceable Parts List ........................................................ 4-9
AVG7 Analog Video Generator
AVG7 Analog Video Generator Theory of Operation........................................................ 5-1
AVG7 Analog Video Generator Adjustment Procedures..................................................... 5-3
Requirements for Adjustment .............................................................................. 5-3
Equipment Required......................................................................................... 5-4
Output Offset and Gain Adjustment....................................................................... 5-4
Frame Timing and Clock Timing Adjustments........................................................... 5-7
Group Delay Adjustment ................................................................................. 5-10
Frequency Response Adjustment ........................................................................ 5-13
Interchannel Delay Adjustment .......................................................................... 5-17
Frequency Response Confirmation ...................................................................... 5-20
Interchannel Delay Confirmation ........................................................................ 5-20
AVG7 Analog Video Generator Maintenance............................................................... 5-21
AVG7 Analog Video Generator Removal and Replacement............................................... 5-22
Tools Required............................................................................................. 5-22
Replacing the Rear-Panel Connectors and Chassis .................................................... 5-22
AVG7 Analog Video Generator Troubleshooting........................................................... 5-24
Equipment Required....................................................................................... 5-24
Backing Up the Instrument Settings .................... .............................. ................... 5-24
Troubleshooting Trees..................................................................................... 5-25
TG700 TV Signal Generator Platform Service Manual iii

Table of Contents
AVG7 Analog Video Generator Diagram.................................................................... 5-27
AVG7 Analog Video Generator Replaceable Parts List.................................................... 5-28
AWVG7 Analog Wideband Video Generator
AWVG7 Analog Wideband Video Generator Theory of Operation ........................................ 6-1
AWVG7 Analog Wideband Video Generator Adjustment Procedures ..................................... 6-3
Requirements for Adjustment .............................................................................. 6-3
Equipment Required......................................................................................... 6-4
Output Offset and Gain Adjustment ....................................................................... 6-4
Frame Timing and Clock Timing Adjustments........................................................... 6-7
Frequency Response Adjustment ........................................................................ 6-10
AWVG7 Analog Wideband Video Generator Maintenance ............................................... 6-14
AWVG7 Analog Wideband Video Generator Removal and Replacement............................... 6-15
Tools Required ............................................................................................. 6-15
Replacing the Rear-Panel Connectors and Chassis .................................................... 6-15
AWVG7 Analog Wideband Video Generator Troubleshooting ........................................... 6-17
Equipment Required....................................................................................... 6-17
Backing Up the Instrument Settings .. .......... .......................... .......... ..................... 6-17
Troubleshooting Trees..................................................................................... 6-18
AWVG7 Analog Wideband Video Generator Diagram .................................................... 6-20
AWVG7 Analog Wideband Video Generator Replaceable Parts List .................................... 6-21
BG7 Black Generator
BG7 Black Generator Theory of Operation ................................................................... 7-1
BG7 Black Generator Adjustment Procedures ................................................................ 7-2
Requirements for Adjustment .............................................................................. 7-2
Equipment Required......................................................................................... 7-2
Output Offset and Gain Adjustment ....................................................................... 7-3
Luminance Gain Adjustment (Option CB Only)......................................................... 7-6
BG7 Black Generator Maintenance ............................................................................ 7-8
BG7 Black Generator Removal and Replacement............................................................ 7-9
Tools Required ............................................................................................... 7-9
Replacing the Rear-Panel Connectors and Chassis ...................................................... 7-9
BG7 Black Generator Troubleshooting ...................................................................... 7-11
Equipment Required....................................................................................... 7-11
BackingUptheInstrumentSett
ings..................................................................... 7-11
Troubleshooting Trees..................................................................................... 7-12
iv TG700 TV Signal Generator Platform Service Manual