RCA 27V530T Diagram
VERTICAL
TO
E8
RED BIAS
<21-B>
TO
E7
GRN BIAS
E5003
E5007
TP50
RED OUTPUT
TP24
194V
TECHNICAL TRAINING
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
0
1
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
1
0
1
1
0
0
0
1
1
0
1
0
1
1
0
0
0
ITC008 Technical
Training Manual
0
0
1
0
1
1
1
0
0
1
0
1
1
1
1
0
FOREWORD
The ITC008 training course is an objective based training course designed to provide
the service technician with information key to the servicing of the chassis. This
training course is to be used in conjunction with the service data and additional
information found in the ESI Service Data. Upon completion of this training course
the service technician will:
· Have a basic understanding of features and menu’s
· Gain a block diagram understanding of major systems and their function
· Identify key circuits and use troubleshooting procedures to service those
circuits
· Isolate a dead set condition to a defective circuit or component area.
SAFETY INFORMATION CAUTION
Safety information is contained in the appropriate Thomson Service Data. All
product safety requirements must be complied with prior to returning the instrument
to the consumer. Servicers who defeat safety features or fail to perform safety
checks may be liable for any resulting damages and may expose themselves and
others to possible injury.
All integrated circuits, all surface mounted devices, and
many other semiconductors are electrostatically sensitive
and therefore require special handling techniques.
First Edition - First Printing
Copyright 2003 Thomson
Trademark(s)® Registered Marca(s) Registrada(s)
Printed in U.S.A.
Prepared by
Thomson
Technical Training Department, INH905
PO Box 1976
Indianapolis, Indiana 46206 U.S.A.
Contents
FOREWORD ............................................................. 3
SAFETY INFORMATION CAUTION ......................... 3
INTRODUCTION....................................................... 6
ALERT GUARD OVERVIEW .................................... 7
CUSTOMER MENUS .............................................. 11
OVERVIEW ............................................................. 13
CIRCUIT OVERVIEW.............................................. 16
AUDIO VIDEO PROCESSING................................ 16
MAV CBA SWITCHING...........................................17
MAIN CBA PROCESSING...................................... 18
SYSTEM CONTROL............................................... 20
Page 4
Contents
POWER SUPPLY .................................................... 22
SWITCHED POWER SUPPLY ................................ 24
HORIZONTAL DEFLECTION ................................. 25
E/W CORRECTION.................................................26
VERTICAL DEFLECTION....................................... 28
SHUTDOWN ........................................................... 30
TROUBLESHOOTING............................................ 32
DEAD SET TROUBLESHOOTING .................... 32
SHUTDOWN TROUBLESHOOTING................. 34
HORIZONTAL TROUBLESHOOTING............... 36
SYSTEM CONTROL TROUBLESHOOTING..... 37
Page 5
Introduction
New for 2003 is the ITC008 chassis. The ITC in ITC008 stands for International
Television Chassis. Designed after the TX809, the ITC008 will be used in other
countries and the US. This chassis will replace the TX series and CTC203 core line
chassis. Screen sizes for the ITC008 include 13 “ to 36“. An E/W module is used
for pincushion correction on the larger screen sizes. A new Ultimate One Chip (UOC)
system control and single audio / video switch IC is used in the ITC008. Other
additions to the ITC08 are YPrPb input and the US version will incorporate the Alert
Guard module.
Other features of the set include:
• Universal Remote with Alert Guard buttons
• Chipper Check connection “TECI Bus” (Thomson Equipment Communications
Interface)
• Shared inputs S-Video / Composite / Y
• Audio Output
• Kid Pass
The ITC008 training course will cover:
• Overview of Alert Guard and how it works
• Basic understanding of features and menu’s: This includes new menu items
associated with Alert Guard.
• Overview of chassis
• Key circuits: Key circuits being power supplies, deflection, shutdown, and
system control.
• Dead set troubleshooting
Page 6
Alert Guard
Alert Guard
CBA
CBA
MAV CBA
MAV CBA
Chipper Check (TECI)
Chipper Check (TECI)
EW
EW
CBA
CBA
Chassis Layout
Alert Guard Overview
Alert Guard is designed to detect alerts that include 30-plus natural disasters such
as avalanches, blizzards, forest fires, tsunami, hurricanes, tornados, volcanoes,
flash floods, and earthquakes. Local and state emergency alerts cover chemical
spills, nuclear power plant emergencies, gas line breaks, chemical storage center
mishaps, train derailments and refinery fires, among others. The system also
provides for high-level state or federal emergencies such as terrorist alerts, biowarfare alerts, bombing threats and immediate life-threatening emergencies relayed
by FEMA and NOAA over the all hazard NWR (NOAA Weather Radio) network from
several federal agencies. In the event of an emergency, the decoded data is
displayed as text on the TV and or the audio alert is announced via the TV’s speakers.
The Alert Guard module in the ITC008 allows the set to receive alert information from
NOAA (National Oceanic and Atmospheric Administration). This information can be
displayed as text or audio from the National Weather Radio service. Alert Guard
receives digital data known as SAME (Specific Area Message Encoding) combined
with audio information provided by NOAA Weather Radio (NWR) and alerts the
consumer to various levels of emergency.
Page 7
NOAA has numerous transmitter towers across the US transmitting on any one of
seven frequencies. This level of coverage allows NOAA to cover just about every
household in the US. Note: For more information about NOAA, visit www.noaa.gov.
162.400
MHz
162.425
MHz
162.450
MHz
162.475
MHz
162.500
MHz
162.525
MHz
162.550
MHz
NWR Frequencies
There are four status levels for Alert Guard:
1. System Ready (Green LED)
2. Advisory (Yellow LED)
3. Watch (Orange LED)
4. Warning (Red LED)
System Ready indicates that a NWR signal is being received from one of the seven
frequencies setup by NOAA and decoded. The LED will be lit only when the NWR
signal is strong enough to decode the SAME data. This is not an indication that the
NWR signal being received is correct for a particular area only that a signal is being
received.
Page 8
Alert Guard CBA
Advisory indicates conditions when the area setup by the user is listed in a advisory
condition. The Advisory conditions are: Administrative Message Child Abduction
Emergency (AMBER alerts), Emergency Action Termination, Flash Flood Statement,
Flood Statement, Hurricane Statement, Local Area Emergency, National Information
Center Message, Network Message Notification, 911Telephone Outage Emergency,
Severe Weather Statement, and Special Weather Statement.
NOAA conducts a weekly test for the all hazards broadcast system. The test is once
a week on Wednesday between 10 a.m. and 12 noon for approximately 15 minutes.
The yellow ADVISORY light blinks during the test. If there is ongoing severe weather
or a threat of severe weather, the test is postponed until the next available goodweather day. Alert Guard uses this test to ensure proper setup of channel and
location. If Alert Guard detects a problem, on-screen messages appear to provide
help.
Watch indicates conditions when the area setup by the user is listed in a Watch
condition. The Watch conditions are: Avalanche Watch, Coastal Flood Watch,
Flash Flood Watch, Flood Watch, High Wind Watch, Hurricane Watch, Severe
Thunderstorm Watch, Tornado Watch, Tropical Storm Watch, Tsunami Watch, and
Winter Storm Watch
Warning indicates conditions when the area setup by the user is listed in a warning
condition. The warning conditions are: Avalanche Warning, Blizzard Warning, Civil
Danger Warning, Civil Emergency Message, Coastal Flood Warning, Dust Storm
Warning, Earthquake Warning, Emergency Action Notification, Fire Warning, Flash
Flood Warning, Flood Warning, Hazardous Materials Warning, High Wind Warning,
Hurricane Warning, Immediate Evacuation, Law Enforcement Warning, Nuclear
Power Plant Warning, Practice/Demo Warning, Radiological Hazard Warning,
Severe Thunderstorm Warning, Shelter in Place Warning, Special Marine Warning,
Tornado Warning, Tropical Storm Warning, Tsunami Warning, Volcano Warning,
and Winter Storm Warning.
The Alert Guard system broadcasts alerts for the U.S. U.S. territories, possessions
and associated states. The TV can’t receive any alerts for locations outside these
areas. Also, if alerts are issued for areas other than those that are set in the Location
menu, Alert Guard won’t notify the user of these alerts.
There are several Alert Guard menus that the user can use to setup and customize
Alert options.
Page 9
Alert Guard Menus:
• Alert Options
• Locations
• News Weather
• NWR Channel
Alert Options have to do with how the alert is sounded, type of alarm, and or text
display. These options are customized for each of the three alert types. Different
types of alarms can be set for each alert. This allows the user hear a different alarm
for each of the alert types. The alarm volume is also set independent for each alert.
Locations menu provides up to four area locations starting with My Area. My Area
is the location of the set. Areas 1-3 are used for the surrounding areas. Only areas
listed in the NWR broadcast will remain in area setup. In other words if the user lives
in Texas and selects a location in Florida, the Florida area will be removed when the
next NWR test is conducted. This is also true for adjoining counties that are covered
by different transmitters.
News Weather allows the user to select the local news weather channel to go to when
the news weather button is pressed. There are four locations the user can setup.
When the user pushes the news weather button the set will toggle through each of
the four choices, similar to a favorite channel list with only four channels.
NWR Channel sets the strongest NWR radio station received. If more then one
station is heard in the area, the strongest station will be stored. The user has the
option to manually set this to the proper station for their location.
Page 10
Customer Menus
There are five main menu items for the standard ITC008. The Alert Guard version
has an additional setup menu for Alert Guard. The five standard menu items cover
the typical customer menu options found in most TV’s. These menu options are:
• Sound
• Picture
• Setup
• Parental Control
• Time
• Alert Guard (Alert Guard equipped sets)
Sound Menu
The sound menu allows the user to customize the audio by adjusting base, treble,
and balance. Stereo mode selection includes mono, stereo, and enhanced. SAP
(secondary audio programming), internal speakers and auto volume level can be
turned on or off in the sound menu. Audio out can be set to fixed or variable.
Picture Menu
The picture menu provides the user with options to customize picture settings.
These setting include:
• Brightness
• Contrast
• Color
• Tint
• Tilt (on some sets)
Picture preset option allows the user to select from bright, natural, personal, and soft.
These settings are preset at the factory and only the personal setting can be
customized by the above adjustments. Auto color and Color warmth settings are
also included in the picture menu.
Page 11
Setup Menu
• Auto Channel Search
• List and Labels
• Closed Caption
• Auto Tuning
• Language
Parental Control
New parental controls, which work with a simple password, include a wide variety of
options including setting the maximum hours viewed per day before automatically
shutting down. The Kid Pass allows the parent to set how long the viewing time of
the set is for each day of the week. The times are set in 30 min increments and after
the set has been on for the preset length of time it will shutdown. The password will
need to be entered for set operation after the Kid Pass time has expired. Kid Pass
is only available after the time is set.
NOTE: The password can be reset if it is unknown. First make sure the TV is off.
Then simultaneously press and hold VOL< on the TV’s front panel and CLEAR on
the remote for approximately 5 seconds.
Time Menu
The time menu is used to set the correct time. This is critical for Kid Pass operation
and will be blocked by password when Kid Pass is set.
Page 12
ITC008 Chassis Layout
Loading...