TCL NX56LA Service Manual
TCL
SERVICE MANUAL
NX56LA
1、 Caution………………………………………………………………………2
2、 Specification…………………………………………………………………6
3、 Alignment Procedure………………… … ………………………………13
4、 Block Diagram………………………………… …………………………25
5、 Signal Processing Introduction……………………………………………26
6、 PCB Layout…………………………………………………………………33
7、 Schematic Diagram…………………………………………………………35
8、 Specification of Main IC……………………………………………………40
9、 BOM list (Temporal lacking )………………………………………………61
10、 Explode V iew Diagram(Temporal lacking )………………………………74
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product
WARNING: TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION: TO REDUCE THE RISK OF
ELECTRICAL SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The lighting flash with arrowhead symbol, with an equilateral triangle is intended to
alert the user to the presence of uninsulated voltage within the products
enclosure that may be of sufficient magnitude to constitute a risk of electric shock to
the person.
The exclamation point within an equilateral triangle is intended to alert the user to the
presence of important operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
CAUTION:
Use of controls, adjustments or procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION
RISK RISK OF OF ELECTRIELECTRICC
SHOCK SHOCK DO DO NOT NOT OPEN.OPEN.
2
dangerous
1、
3
FOR YOUR PERSONAL SAFETY
1. When the power cord or plug is damaged or frayed, unplug this television set from the wall outlet and refer servicing to
qualified service personnel.
2. Do not overload wall outlets and extension cords as this can result in fire or electric shock.
3. Do not allow anything to rest on or roll over the power cord, and do not place the TV where power cord is subject to
traffic or abuse. This may result in a shock or fire hazard.
4. Do not attempt to service this television set yourself as opening or removing covers may expose you to dangerous
voltage or other hazards. Refer all servicing to qualified service personnel.
5. Never push objects of any kind into this television set through cabinet slots as they may touch dangerous voltage
points or short out parts that could result in a fire or electric shock. Never spill liquid of any kind on the television set.
6. If the television set has been dropped or the cabinet has been damaged, unplug this television set from the wall outlet
and refer servicing to qualified service personnel.
7. If liquid has been spilled into the television set, unplug this television set from the wall outlet and refer servicing to
qualified service personnel.
8. Do not subject your television set to impact of any kind. Be particularly careful not to damage the picture tube surface.
9. Unplug this television set from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.
10.1. Do not place this television set on an unstable cart, stand, or table. The television set may fall, causing serious injury
to a child or an adult, and serious damage to the appliance. Use only with a cart or stand recommended by the
manufacturer, or sold with the television set. Wall or shelf mounting should follow the manufacturer s instructions, and
should use a mounting kit approved by the manufacturer.
10.2. An appliance and car t combination should be moved with care. Quick stops, excessive force, and uneven surfaces
may cause the appliance and cart combination to overturn.
CAUTION:
Read all of these instructions. Save these instructions for later use. Follo w all Warnings and
Instructions marked on the audio equipment.
1. Read Instructions- All the safety and operating instructions should be read before the product is operated.
2. Retain Instructions- The safety and operating instructions should be retained for future reference.
3. Heed Warnings- All warnings on the product and in the operating instructions should be adhered to.
4. Follow Instructions- All operating and use instructions should be followed.
IMPORTANT SAFETY INSTRUCTIONS
4
PROTECTION AND LOCATION OF YOUR SET
11. Do not use this television set near water ... for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a
wet basement, or near a swimming pool, etc.
Never expose the set to rain or water. If the set has been exposed to rain or water, unplug the set from the wall
outlet and refer servicing to qualified service personnel.
12. Choose a place where light (artificial or sunlight) does not shine directly on the screen.
13. Avoid dusty places, since piling up of dust inside TV chassis may cause failure of the set when high humidity persists.
14. The set has slots, or openings in the cabinet for ventilation purposes, to provide reliable operation of the receiver, to
protect it from overheating. These openings must not be blocked or covered.
Never cover the slots or openings with cloth or other material.
Never block the bottom ventilation slots of the set by placing it on a bed, sofa, rug, etc.
Never place the set near or over a radiator or heat register.
Never place the set in enclosure, unless proper ventilation is provided.
PROTECTION AND LOCATION OF YOUR SET
15.1. If an outside antenna is connected to the television set, be sure the antenna system is grounded so as to provide some
protection against voltage surges and built up static charges, Section 810 of the National Electrical Code, NFPA No.
70-1975, provides information with respect to proper grounding of the mast and supporting structure, grounding of the
lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna discharge unit, connection
to grounding electrode, and requirements for the grounding electrode.
15.2. Note to CATV system installer : (Only for the television set with CATV reception)
This reminder is provided to call the CATV system attention to Article 820-40 of the NEC that provides
guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding
system of the building, as close to the point of cable entry as practical.
16. An outside antenna system should not be located in the vicinity of overhead power lines or other electric lights or power
circuits, or where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care
should be taken to keep from touching such power lines or circuits as contact with them might be fatal.
17. For added protection for this television set during a lightning storm, or when it is left unattended and unused for long
periods of time, unplug it from the wall outlet and disconnect the antenna. This will prevent damage due to lightning
and power-line surges.
ANTENNA
LEAD- IN WIRE
ANTENNA DISCHARGE
UNIT (NEC SECTION
810-20)
GROUNDING
CONDUCTORS
(NEC SECTION810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250. PART H)
ELECTRIC SERVICE
EQUIPMENT
GROUND CLAMP
NEC-NATIONAL ELECTRICAL CODE
EXAMPLE OF ANTENNA GROUNDING AS PER
NATIONAL ELECTRICAL CODE
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE INSTRUCTIONS
a built-in
installer s
OPERATION OF YOUR SET
18.
This television set should be operated only from the type of power source indicated on the marking label. If you are not
sure of the type of power supply at your home, consult your television dealer or local power company. For television
sets designed to operate from battery power, refer to the operating instructions.
19. If the television set does not operate normally by following the operating instructions, unplug this television set from the
wall outlet and refer servicing to qualified service personnel. Adjust only those controls that are covered in the operating
instructions as improper adjustment of other controls may result in damage and will often require extensive work by a
qualified technician to restore the television set to normal operation.
20. When going on a holiday : If your television set is to remain unused for a period of time, for instance, when you go on
a holiday, turn the television set and unplug the television set from the wall outlet.
IF THE SET DOES NOT OPERATE PROPERLY
21. If you are unable to restore normal operation by following the detailed procedure in your operating instructions,
do not attempt any further adjustment. Unplug the set and call your dealer or service technician.
22. Whenever the television set is damaged or fails, or a distinct change in performance indicates a need for
service, unplug the set and have it checked by a professional service technician.
23. It is normal for some TV sets to make occasional snapping or popping sounds, particularly when being
turned on or off. If the snapping or popping is continuous or frequent, unplug the set and consult your
dealer or service technician.
FOR SERVICE AND MODIFICATION
24. Do not use attachments not recommended by the television set manufacturer as they may cause hazards.
25. When replacement parts are required, be sure the service technician has used replacement parts specified
by the manufacturer that have the same characteristics as the original part. Unauthorized substitutions
may result in fire, electric shock, or other hazards.
26. Upon completion of any service or repairs to the television set, ask the service technician to perform
routine safety checks to determine that the television is in safe operating condition.
5
off
TCL-Thomson Electronics R&D Center (Shen’Zhen Lab)
Chassis Name Serial No.
Issued On Page
Updated On Version
Product Functional Specification
NX56-LA
2008-5-19 1 of 7
1.0
TTE Corporation R&D Center (Shen’Zhen Lab)
Disclosure
Chassis Name
Issued On
Updated On
Proprietary Information: These drawings and specifications are the property of TCL-Thomson Electronics and shall not be
reproduced or copied or used as the basis for the manufacture or sale of apparatus or devices without the written
permission of TCL-Thomson Electronics.
Version Information: Version states by two Arabic Numbers, which is separated by one dot, e.g. 1.2. The first number “1”
means the version of approved file, the second one ”2” means the version of draft.
NX56-LA Serial No.
2008-5-19 2 of 7
1.0
Page
Version
TTE Corporation R&D Center (Shen’Zhen Lab)
Revision History
Model No. Date
Prepared by
lipeng 2008.5.19
Checked by
Released by:
Prepared by
lipeng 2008.5.19
Checked by
Released by:
Revised by
Checked by
Released by:
Revised by
Checked by
Released by:
Chassis Name
Issued On
Updated On
3 of 7
29185
V1.0
03-B185SAE-SC31
21M63US
V1.0
03-DM63SAE-SC31S
Version 1.0
Status Comment
NX56-LA
2008-5-19
Serial No.
Page
TTE Corporation R D Center (Shen’Zhen Lab)
Model
Item
Master Data
-Version
11
-Customer ID
EM EM
-Destination
EM EM
-Brand
-BOM NO.
03-B185SAE-SC31 03-DM63SAE-SC31S
-Chassis
Reception
-Tuning [Channels Amt.]
181 181
-Tuning [Technology]
PLL PLL
-Tuning [Indication]
Channel Channel
-Frequency Bands
Antenna AND Cable Antenna AND Cable
-IF Frequency
45.7MHz 45.7MHz
-TV Systems (Color+ Sound)
PAL M/N NTSC M PAL M/N NTSC M
-AV Systems
NTSC PAL NTSC PAL
Picture-Processing
-SCAN
Standard Standard
-Wide Screen Switching
-Comb filter
-Picture Enhancement
LTI / CTI
Black Stretch
Dynamic Skin
Others
-Picture Control [General]
Brightness
XX
Sharpness
XX
Contrast
XX
Tint
XX
Color
XX
-Picture Control [Special]
Smart Pictures * modes
4 modes 4 modes
VM
Color Temperature
3 modes 3 modes
Others
-Picture Noise Reduction
XX
Picture – Display
-CRT Type
Normal Flat
Pure Flat
XX
Super Flat
-Deflection system
1Fh
XX
2Fh
-Tube Technology
Iron
AK
XX
Black Matrix
Others
-CRT Deflection ( * Deg.)
110 120
-CRT Magnetic Field
-Screen Type
4:3 4:3
-Screen Size / Vis. Size
29' 21' Super Slim
Sound
-Audio Power Consumption
5W+5W 4W+4W
-Surround Sound
NX56-LA
29185
NX56-LA
21M63US
Chassis: NX56-LA
Version: 1.0
TTE Corporation R D Center (Shen’Zhen Lab)
Model
Item
NX56-LA
29185
NX56-LA
21M63US
-Nicam
-America Stereo (MTS,BTSC,MPS)
XX
-America SAP
-Korea Stereo
-Thai Bilingual
-Super Woofer
-AVL
-Sound Control [General]
Volume
XX
Mute
XX
-Sound Control [Special]
Treble
Bass
Balance
XX
Equalizer
Smart Sound * modes
Others
-Speakers Quantity
2X1 2X1
User Interface
-Menu Language
English/Portugal/Espanol English/Portugal/Espanol
-Features [General]
AT
Biological Clock
Calendar
Clock
Channel Swap
XX
Channel Naming
Child Lock
XX
Favorite Channel
XX
Game
Hotel Mode
XX
High Sensitive
Notebook
On/Off Timer
Preset
XX
Recall
XX
Rotation
Sleep
XX
AVC
-Features [Special]
V-chip / CCD
XX
Teletext *Pages
Others
New Features
Smart signal
Voltage display
环境光检测
Easy search
Tuning Features
-Auto Channel Program
XX
-Auto/Manual Tuning
XX
-Auto/Manual Store
XX
-Fine Tuning
XX
-Factory Mode
XX
-Service Mode
Cabinet
-Cabinet Name
Chassis: NX56-LA
Version: 1.0
TTE Corporation R D Center (Shen’Zhen Lab)
Model
Item
NX56-LA
29185
NX56-LA
21M63US
-Front Cabinet Color
-Middle Cabinet Color
-Rear Cabinet Color
-Local Controls Front
Mains Switch
XX
CH+ CH- VOL+ VOL-
XX
TV/AV
XX
Menu
XX
Auto Search
-Local Controls Top
CH+ CH- VOL+ VOL TV/AV
Menu
Auto Search
-Indicator
RC Received LED
XX
Standby LED
XX
Remote Controller
-Type
RC166 RC166
-Batteries
Connectors Rear
-SCART Full w/o Y/C
-SCART Full with Y/C
-SCART Single (CVBS)
-Component In (YPbPr) Cinch for 50Hz
-In Y/C+Cinch(CVBS+ Stereo)
1 + 1 1 + 2
-In Y/C+Cinch (CVBS+ Mono)
-In Cinch(CVBS+ Stereo)
-In Cinch (CVBS+ Mono)
-Out Cinch(CVBS+ Stereo)
-Out Cinch(CVBS+ Mono)
1(follow TV) 1(follow TV)
- Y,Cb,Cr input
XX
-Super Woofer
-Digital Audio Out
-Loudspeakers
-Control Busses
-Feature Slot
-ITV Smart Port
- Antenna in
75 Ohms (F Type)
XX
Connectors Front/Side
-In Y/C+Cinch(CVBS+ Stereo)
-In Y/C+Cinch (CVBS+ Mono)
-In Cinch(CVBS+ Stereo)
X
-In Cinch (CVBS+ Mono)
-Out Headphone
Mini-Jack 3.5mm
Final Equipment
-Packing –Methods
2 Color Printing
Carton Color
-Documents and Manuals
Instruction Book
Screen Sticker
Plastic Bag
Warranty Card
Chassis: NX56-LA
Version: 1.0
TTE Corporation R D Center (Shen’Zhen Lab)
Model
Item
NX56-LA
29185
NX56-LA
21M63US
Guarantee Doc.
Warning Label
Approbation Label
Others
-Languages DFU
-Indication on BACKOVER
Made-in in family sheet
FCC/Elect Shock Caution Label
CE/Elect Shock Caution Label
Warning Label
Others
Miscellaneous
-Mains Voltage
100-240V 100-240V
-Mains Frequency
50/60Hz 50/60Hz
-Type Mains Cord
-Power Consumption TV in ON
75W 75W
-Power Consumption TV in Standby
<3W <3W
Approbation
IEC65 IEC65
Chassis: NX56-LA
Version: 1.0
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name
NX56-LA
Serial No.
Issued on
2008-05-19
Page
Page 1 of 12
Updated on
Version
1.0
NX56-LA Chassis
Alignment Procedure
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name
NX56-LA
Serial No.
Issued on
2008-05-19
Page
Page 2 of 12
Updated on
Version
1.0
Disclosure
Proprietary Information: These drawings and specifications are the
property of TCL-Thomson Electronics and shall not be reproduced or
copied or used as the basis for the manufacture or sale of apparatus or
devices without the written permission of TCL-Thomson Electronics.
Version Information: Version states by two Arabic Numbers, which is
separated by one dot, e.g. 1.2. The first number “1” means the version of
approved file, the second one ”2” means the version of draft.
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name
NX56-LA
Serial No.
Issued on
2008-05-19
Page
Page 3 of 12
Updated on
Version
1.0
Revision History
Model No. Status Date Comment
Prepared by LIPENG 2008-05-15
Checked by
29185
Released by
03-B185SAE-SC31
（29185/NX56-LA）
Prepared by LIPENG 2008-05-15
Checked by
21M63US
Released by
03-DM62SAE-SC31S
（21M63US/NX56-LA）
Revised by
Checked by
Released by
Revised by
Checked by
Released by
Revised by
Checked by
Released by
Revised by
Checked by
Released by
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name
NX56-LA
Serial No.
Issued on
2008-05-19
Page
Page 4 of 12
Updated on
Version
1.0
1.1. The way to enter P-Mode
a) Method one
A) Switch on the TV set.
B) Press the “MENU” key on RC to show the “PICTURE” OSD menu.
C) Move the cursor to “Contrast” item then press the “9”, “7”, “3”, “5” key
continuously on RC within 3 seconds then enter P-Mode. The “P” letter will
appear on the left low corner of the screen when enter P-Mode. Also the
“FACTORY HOTKEY” will be set to “ON ( = 1 )”.
b) Another method
Press the “RECALL” key on RC to enter P-mode directly.
*Notes:
1. This will be active only when the “FACTORY HOTKEY” had set to “ON ( = 1 )”.
2. When the power on with “FACTORY HOTKEY” had set to “ON ( = 1 )”, the set
will enter the P-Mode automatically.
1.2. Exit the P-Mode
Press the “RECALL” or “MENU” key on RC to exit the P-Mode.
1.3. Keys’ function on RC at the P-Mode
Use the RC to navigate in P-Mode:
Press “0” to “9” key to select factory adjustment page.
Press “▲▼” key to select option.
Press “►◄” key to adjust or select option.
Press “DISPLAY” key to display software version.
Press “MENU” key to exit the P-Mode.
Press “RECALL” key to enter or exit the P-Mode.
All change in P-Mode will be saved in EEPROM automatically
1.4. The adjustment page list on P-Mode:
RC key Item Description
0 Screen voltage adjustment
1 Picture Geometric adjustment 1 Vertical geometry
2 Picture Geometric adjustment 2 Horizontal geometry
3 White Balance Adjustment
4 Setup 1
5 Setup 2
6 Setup 3
7 Setup 4
8 Setup 5
9 I2C Bus OFF
Press this key to enter or exit BUS
OFF mode
DISPLAY Display software version
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name
NX56-LA
Serial No.
Issued on
2008-05-19
Page
Page 5 of 12
Updated on
Version
1.0
2. Flowchart of alignment procedure
B+ adjustment Electrical
properties
checking for
chassis
RF AGC
adjustment
Parameter setup White balance
Adjustment
Aging
Adjustment of
focus voltage
Adjustment of
screen voltaget
PAL geometry
adjustment
NTSC
geometry
adjustment
Set shopping
status
QC checking
1) B+ Adjustment
2) RF AGC Adjustment
3) Screen & Focus adjustment
4) White balance adjustment
5) Producing parameter setup and option
6) Picture Geometry adjustment ( Vertical first)
7) Set Shopping status
8) QC
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name
NX56-LA
Serial No.
Issued on
2008-05-19
Page
Page 6 of 12
Updated on
Version
1.0
3. Adjustment description
*Notes: Alignment should be done after 3 minutes warm up of TV.
3.1 B+ Voltages
1. All relevant connectors and modules must be connected and inserted.
2. Main voltage is at 220VAC, 50Hz.（voltage range:110VAC~240VAC,50Hz）
3. Connect a voltmeter to B+ (Cathode of D808) and switch on the set.
4. Input Philips test pattern signal and standard mode.
5. Adjust VR801, it should as the value in below form B+ Voltage.
Table 3.1.1: The B+ value for vary tubes
CRT type (Part Number) B+ Voltage
A68ERF185X013/MS (44-29RFLT-HFCA) 125V+/-0.5V
A51QGT420X34(44-21RFLS-LGDA) 108V+/-0.5V
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