Tektronix WFM4000 Series User manual

xx
WFM4000 and WFM5000
Waveform Monitors
ZZZ
Service Manual
*P077244201*
077-2442-01

WFM4000 and WFM5000
Waveform Monitors
ZZZ
Service Manual
xx
Revision B
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.
www.tektronix.com
077-2442-01

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 ......................................................................................... iv
Service Safety Summary.......................................................................................... vi
Preface............................................................................................................. vii
Manual Conventions......................................................................................... vii
Related Manuals ............................................................................................. viii
Introduction ......................................................................................................... 1
Service Strategy................................................................................................ 1
Specifications................................................................................................... 1
Performance Verification...................................................................................... 1
Options and Accessories...................................................................................... 1
Configurations.................................................................................................. 1
Hardware Installation.......................................................................................... 2
Product Upgrade............................................................................................... 2
Operating Information......................................................................................... 2
Theory of Operation................................................................................................ 3
SDI I/O Board.................................................................................................. 5
Reference I/O Board........................................................................................... 5
Main Board..................................................................................................... 5
Front Panel ..................................................................................................... 6
Audio............................................................................................................ 7
Fan Control..................................................................................................... 7
Power Supply and Distribution............................................................................... 7
General Maintenance............................................................................................... 9
Preventing ESD................................................................................................ 9
Inspection and Cleaning...................................................................................... 10
Troubleshooting............................................................................................... 12
Detailed Troubleshooting Procedures ...................................................................... 15
Repackaging Instructions......................................................................................... 21
Packaging...................................................................................................... 21
Shipping to the Service Center.............................................................................. 21
Removal and Replacement Procedures ......................................................................... 22
Preparation..................................................................................................... 22
Module Removal.............................................................................................. 24
Replaceable Parts.................................................................................................. 41
Parts Ordering Information .................................................................................. 41
Using the Replaceable Parts Lists........................................................................... 42
WFM4000 and WFM5000 Service Manual i

Table of Contents
List of Figures
Figure 1: Block diagram........................................................................................... 4
Figure 2: Backplane board power supply test points.......................................................... 18
Figure 3: WFM overview view 1................................................................................ 25
Figure 4: WFM overview view 2................................................................................ 26
Figure 5: Rear panel cover removal............................................................................. 27
Figure 6: I/O bracket removal.................................................................................... 29
Figure 7: Main board removal ................................................................................... 30
Figure 8: SDI and REF connectors.............................................................................. 31
Figure 9: SDI and Ref board removal........................................................................... 32
Figure 10: Backplane board view 1 ............................................................................. 33
Figure 11: Backplane board view 2 ............................................................................. 34
Figure 12: Backlight driver board removal..................................................................... 35
Figure 13: Front panel assembly removal ...................................................................... 36
Figure 14: Front panel board and backlight removal.......................................................... 37
Figure 15: Removing the LCD assembly bracket.............................................................. 39
Figure 16: Backlight removal.................................................................................... 40
ii WFM4000 and WFM5000 Service Manual

Table of Contents
List of Tables
Table i: Related documentation................................................................................. viii
Table 1: External inspection check list.......................................................................... 11
Table 2: Internal inspection check list........................................................................... 11
Table 3: Required test equipment................................................................................ 13
Table 4: Symptoms and causes .................................................................................. 14
Table 5: Backplane board secondary supplies.................................................................. 17
Table 6: Lead-free solder and paste ............................................. ...................... .......... 23
Table 7: Tools required for module removal ................................................................... 24
Table 8: Module removal......................................................................................... 24
Table 9: Parts list column descriptions.......................................................................... 42
Table 10: Figure 3 replaceable parts list ........................................................................ 42
Table 11: Figure 4 replaceable parts list ........................................................................ 43
Table 12: Figure 5 replaceable parts list ........................................................................ 43
Table 13: Figure 6 replaceable parts list ........................................................................ 43
Table 14: Figure 7 replaceable parts list ........................................................................ 44
Table 15: Figure 8 replaceable parts list ........................................................................ 44
Table 16: Figure 9 replaceable parts list ........................................................................ 44
Table 17: Figure 10 replaceable parts list....................................................................... 45
Table 18: Figure 11 replaceable parts list....................................................................... 45
Table 19: Figure 12 replaceable parts list....................................................................... 46
Table 20: Figure 13 replaceable parts list....................................................................... 46
Table 21: Figure 14, Figure 15, and Figure 16 replaceable parts list ........................................ 46
Table 22: Accessories............................................................................................. 48
WFM4000 and WFM5000 Service Manual iii

General Safety Summary
General SafetySummary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of a larger system.
Read the safety sections of the other component manuals for warnings and
cautions related to operating the system.
To Avoid Fire or Personal
Injury
Use proper power cord. Use only the power cord specified for this product and
certified for the country of use.
Ground the product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Power disconnect. The power cord disconnects the product from the power source.
Donotblockthepowercord;itmustremain accessible to the user at all times.
Do not operate without covers. Do not operate this product with covers or panels
removed.
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
Replace batteries properly. Replace batteries only with the specified type and
rating.
Recharge batteries properly. Recharge batteries for the recommended charge cycle
only.
Use proper AC adapter. Use only the AC adapter specified for this product.
iv WFM4000 and WFM5000 Service Manual

General Safety Summary
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Provide proper ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
TermsinThisManual These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION.Caution statements identify conditions or practices that could result in
damage to this product or other property.
Symbols and Terms on the
Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the marking.
WARNING indicates an injury hazard not immediately accessible as you
read the marking.
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
WFM4000 and WFM5000 Service Manual v

Service Safety Summary
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
vi WFM4000 and WFM5000 Service Manual

Preface
This manual supports servicing to the module level of the WFM4000 and
WFM5000 Waveform Monitors, which process video signals for display on
an internal XGA LCD. These instruments are used in video and television
broadcasting, production, and post-production environments.
This manual explains how to troubleshoot and service the monitor to the module
level. The manual is divided into the following sections:
Introduction provides a general product description and tells where to find
product installation information.
Theory of Operation provides descriptions of the WFM4000 and WFM5000
Series Waveform Monitors modules.
Maintenance tells you how to troubleshoot the product to the module
level, remove the modules, and provides lists of replaceable modules and
mechanical parts, and replacement part numbers.
Manual Conventions
The following terms and conventions are used throughout this manual:
The term “monitor” is used interchangeably with the more formal term
“WFM4000 and WFM5000 Series Waveform Monitors.”
Theterm“instrument”isusedinterchangeably with the term “monitor.”
The term “module” refers to a collection of parts.
WFM4000 and WFM5000 Service Manual vii

Preface
Related Manuals
This manual assumes you have access to the following manuals and documentation
when servicing this product. The manuals ship with the product on the Product
Documentation CD and are also downloadable from the Tektronix Web site. The
Online Help comes pre-installed on the instrument.
Table i: Related documentation
Item Purpose Location
WFM4000 and WFM5000 Waveform
Monitors User Manual
Installation and high-level operational
overview
WFM4000 and WFM5000 Online Help In-depth operation and UI help
WFM4000 and WFM5000 Waveform
Monitors Specifications and Performance
Verification
Procedure for checking performance and
list of specifications
viii WFM4000 and WFM5000 Service Manual

Introduction
The WFM4000 and WFM5000 Waveform Monitors provide a powerful and
portable monitoring solution for broadcast, production, and post-production
environments.
Service Strategy
The WFM4000 and WFM5000 Series Waveform Monitors will be repaired to the
module level at selected Tektronix service centers. Repair includes functional
verification of the product. Component level repair by the customer is not
supported.
Specifications
The specifications for this product are found on the WFM4000 and WFM5000
Product Documentation CD that ships with the product. (See page viii, Related
Manuals.)
Performance Verification
The Performance Verification procedures for this product are found in the
WFM4000 and WFM5000 Product Documentation CD that ships with the
product. (See page viii, Related Manuals.)
Options and Accessories
The lists of options and accessories for this product are found in the WFM4000
and WFM5000 Waveform Monitors User Manual provided in the WFM4000
and WFM5000 Product Documentation CD that ships with the product. (See
page viii, Related Manuals.)
Configurations
The WFM4000 Waveform Monitor has SD SDI inputs. The WFM5000 Waveform
Monitor has dual mode SD/HD SDI inputs. No other configurations are available
with these instruments.
WFM4000 and WFM5000 Service Manual 1

Introduction
Hardware Installation
The waveform monitor is shipped in a one-piece, unpainted, bathtub shaped,
EMI shell. It can be used as-is or installed into a hard carry case, soft carry case
(requires hard carry case), or rack mount cabinet. For installation instructions
into a rack mount or cabinet, refer to the WFM4000 and WFM5000 Waveform
Monitors and WVR4000 and WVR5000 Waveform Rasterizers System Integration
Technical Reference.
Product Upgrade
No field upgrades are available for the WFM4000 or WFM5000 Waveform
Monitors. When software updates become available, you can access them from
the Tektronix Web site: www.tek.com. The WFM4000 and WFM5000 Waveform
Monitors User Manual includes instructions for updating product software.
Operating Information
For basic operating instructions, refer to the WFM4000 and WFM5000 Waveform
Monitors User Manual that can be found on the WFM4000 and WFM5000
Product Documentation CD that shipped with this product. For more detailed
reference information, refer to the Waveform Monitor Online Help. (Press the
Help button on the instrument and then use the General knob, up/down arrow
keys, and SEL button to navigate through the topics.)
In addition, there is context sensitive help to identify the buttons, knobs, and soft
keys. Press the Help button to enable the context sensitive help. Touch it again
to turn the context sensitive help off.
Power-On Procedure 1. Connect the power cord to the AC adapter. If the instrument has a
rechargeable battery as a power source, connect the connector on the battery
to the rear panel of the instrument and then proceed to step 3.
2. Connect the AC adapter to the rear panel of the instrument and the power cord
to an AC line frequency of 50 or 60 Hz within the range of 100 to 240 volts.
3. Press the Power button.
4. Wait for the system to complete its power-on self-tests.
Power-Down Procedure There are two methods to power down the instrument:
Power Button –PressthePowerbuttontoturntheinstrumentoff.
Power Supply – Unplug the instrument from the power source to turn the
instrument off.
2 WFM4000 and WFM5000 Service Manual

Theory of Operation
The WFM4000 and WFM5000 are modular waveform monitors. They are
configured to accept serial SD digital or HD digital inputs, and digital audio inputs.
All models use an internal XGA monitor for the display.
This theory of operation is mainly based on the High-level Block diagram. (See
Figure 1.)
WFM4000 and WFM5000 Service Manual 3

Theory of Operation
Figure 1: Block diagram
4 WFM4000 and WFM5000 Service Manual

Theory of Operation
SDI I/O Board
Serial Digital Input
Processing
The serial digital inputs are AC coupled and buffered passive loopthroughs.
The signal passes through an amplifier while traveling to the channel selection
switch. Only the amplifier corresponding to the selected channel is “on” (meaning
that only the selected amp gets DC power). The selected signal passes through
an equalizer whose digital differential pair output is sent over the ribbon cable
to the Main board.
AES Audio Input
Processing
The AES digital audio input is AC coupled and bit sliced by a comparator, the
single ended digital output of which is sent over the ribbon cable to the Main
board.
Reference I/O Board
Reference Input The Reference input is an AC coupled and buffered passive loopthrough. The
reference signal is applied to a sync separator, the single ended digital output of
which is sent over the ribbon cable to the Main board.
LTC Input The LTC input is a differential pair that is bit sliced by a comparator, the single
ended digital output of which is sent over the ribbon cable to the Main board.
Ground Closure Interface
Signals
The ground closure interface (GCI) signals are heavily filtered and protected
against adverse customer connections. Inputs (except Future 3 and 4) are buffered
and the digital outputs are sent over the ribbon cable to the Main board. Future
3 and 4, since they have no directional circuitry, could be used as outputs in the
future.
Main Board
Reference Input The Reference input is a passive loopthrough, which is AC coupled and buffered.
The reference signal is applied to a sync separator whose output is supplied to the
DSP FPGA, where the timing information is derived.
Digital Waveform
Processing Engine
The data stream from the SDI video input is applied to the waveform processing
FPGA. This block deformats, up-samples, interpolates, demodulates, and
otherwise processes the data to generate the signals needed to create the displays.
WFM4000 and WFM5000 Service Manual 5

Theory of Operation
Rasterizing Engine The Rasterizer engine resides in the same DSP FPGA as the waveform processing
FPGA. This block builds up the variable intensity images in the fast static RAM.
For each pixel of the display, the Rasterizer Engine increments the intensity of that
pixel every time the waveform hits its coordinates. As a result the waveform areas
hit more frequently are brighter. For any given frame the intensity map is built up
in one memory chip and read out of the other. The functions swap on the next field.
Recursion and Picture
Processing Engine
The output of the rasterizer feeds the picture and recursive processing engine
in the second large FPGA. This engine adds the previous frame to the present
frame to reduce flicker and improve brightness. It also converts the picture and
waveform signals from the input rate to 59.94 Hz frame rate to work with the
XGA monitor. The picture and waveform data combine with the graphics and
audio bar information from the control processor, and then output to the XGA
LCD display drive. Note that the parallel data from the serial digital input connect
directly to this FPGA to provide the picture display functionality, bypassing the
waveform processing engine, which is the DSP FPGA.
Control Processor The control processor is in charge of all the operational modes in the instrument.
It draws the audio bars, communicates with the front panel through SPI signaling,
and controls most other internal devices though either the SPI or the I2Cserial
buses.
The control processor interfaces to the Ethernet through a dual rate connection.
This allows the network connection to run at 10 or 100 MB/s. The control
processor has an internal USB 1.1 port that it uses to interface to the USB.
LTC LTC inputs come from the remote connector on the REF I/O board where it is
converted from differential to single-ended. The LTC signal is applied to the
waveform processing FPGA, which decodes the time code information.
NOTE. The FPGAs decode VITC signals digitally.
Front Panel
The front panel contains a small processor which communicates with the control
processor through SPI signaling. Reprogramming can be done through SPI as
well, if the front panel processor flash code needs to be updated.
6 WFM4000 and WFM5000 Service Manual