TCL 21M62US User manual
TCL
SERVICE MANUAL
21M62US NX56E-LA
1. Caution…………………………………………………………………………2
2. specification……………………………………………………………………6
3. Alignment Procedure…………………………………………………………13
4. Block Diagram ……………………………………………………………… 28
5. Signal Processing Introduction………………………………………………29
6．PCB Layout ……………………………………………………………………34
7. Scheme Diagram………………………………………………………………36
8. Specification of Main IC………………………………………………………40
9．Trouble Shooting ………………………………………………………………61
10. BOM List……………………………………………………………………64
11．Explode Diagram………………………………………………………………76
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 product s
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
ELECTRI
ELECTRIC
SHOCK
SHOCK
DO
DO
NOT
NOT
OPEN.
OPEN.
2
dangerous
1
ǃ
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 cart 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. Follow 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 SECTION 810-21)
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 restorenormal operation by following the detailedprocedure 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 OLSHQJ
Checked by
Released by:
Prepared by OLSHQJ
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
9
%6$(6&
086
9
'06$(6&6
Version 1.0
Status Comment
NX56-LA
2008-5-19
Serial No.
Page
77(&RUSRUDWLRQ5'&HQWHU6KHQÿ=KHQ/DE
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
21M5US
&KDVVLV1;/$ Version: 1.0
77(&RUSRUDWLRQ5'&HQWHU6KHQÿ=KHQ/DE
Model
Item
NX56-LA
29185
NX56-LA
21F5US
-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
⦃๗ܝẔ⌟
(DV\VHDUFK
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
&KDVVLV1;/$ Version: 1.0
77(&RUSRUDWLRQ5'&HQWHU6KHQÿ=KHQ/DE
Model
Item
NX56-LA
29185
NX56-LA
21F5US
-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
&KDVVLV1;/$ Version: 1.0
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Model
Item
NX56-LA
29185
NX56-LA
21F5US
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
&KDVVLV1;/$ 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 15
Updated on 2010-01-27 Version 2.2
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 15
Updated on 2010-01-27 Version 2.2
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 15
Updated on 2010-01-27 Version 2.2
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˅
Prepared by LIPENG 2008-07-4
Checked by
21M83S
Released by
03-DM83SAE-SC31S
˄21M83S/NX56-LA˅
A
ll NX56-LA
chassis Prepared by LIPENG 2009-02-23
Ver2.0
Updated the description
accord with the software
changing.TO NX56B
Prepared by LIPENG 2009-04-10
Checked by
14N23
Released by
Ver2.1
Add AKB adjust method
Prepared by LIPENG 2010-01-27
Checked by
A
ll NX56-LA
chassis
Released by
Ver2.2
Add background color set
A
dd Software eliminate bright
Spot when turn off switch
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name NX56-LA Serial No.
Issued on 2008-05-19 Page Page 4 of 15
Updated on 2010-01-27 Version 2.2
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
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name NX56-LA Serial No.
Issued on 2008-05-19 Page Page 5 of 15
Updated on 2010-01-27 Version 2.2
9 I2C Bus OFF Press this key to enter or exit BUS
OFF mode
AT DISPLAY STATE SCREEN
DISPLAY Display software version
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 15
Updated on 2010-01-27 Version 2.2
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) 99
A51QGT420X34(44-21RFLS-LGDA) 99
A51ERS357X440(44-21RFLE-HF4A) 99
A51ALQ13X04(44-21RFLM-CHDA 99
37SX110Y22-DC05( 44-14OFLN-IR6A) 99
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name NX56-LA Serial No.
Issued on 2008-05-19 Page Page 7 of 15
Updated on 2010-01-27 Version 2.2
3.2 RF AGC alignment
3.2.1 Method 1
A. Connect the detector as shown below (Picture 3.2) to collector of Q101.
B. Receive a grey scale signal with 70dBV amplitude.
C. Enter P-Mode, press “6” key on RC to select “AGCT”.
D. Adjust AGCT item until the output of the detector becomes 0.8Vpp
Picture 3.2
3.2.2 Method 2
A. Receive a grey scale signal with 60dBV amplitude.
B. Enter P-Mode, press “6” key on RC to select “AGCT”.
C. Adjust the “AGCT” value until the hint display “AGC” just change between “0” and “1”.
3.3 Screen & Focus adjustment
*Notes: Alignment below should be done after 15 minutes warm up of TV.
1. Input cross hatch pattern signal to RF input.
2. Enter P-Mode.
3. Press “0” key on the RC and the screen will become a horizontal line.
4. Adjust the “SCREEN” VR of the FBT until the horizontal line can just be seen barely
(minimum visible intensity).
PHWKRGZLWK$.%2))
1RWH
Adjust the “SCREEN” VR
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$GMXVWWKH6&5((195RIWKH)%7XQWLO9*6WDWH/2:2.+,*+GLVSOD\2.
5. Press “0” key again on the RC to exit the screen voltage adjustment mode.
5. Adjust the “FCOUS” VR of the FBT until the vertical line and horizontal line becomes
clear, like picture 3.3.
Collector
of
Q
101
To CRO
TCL-THOMSON Electronics R&D Center (Shen’Zhen Lab)
Chassis Name NX56-LA Serial No.
Issued on 2008-05-19 Page Page 8 of 15
Updated on 2010-01-27 Version 2.2
Picture 3.3
3.4 White Balance Adjustment
1. Input a black and white pattern to RF input.
2. Enter P-Mode, press key “3 ” to select white balance adjustment menu.
3. Use the color analyzer to measure the black side of the screen. Adjust the value of
“RC”,”GC” and “BC” to set the reading of the color analyzer to x=274, y=280. (11500 K).
4. Then measure the white side of the screen. Adjust the value of “RD”, “GD” and “BD” to
set the reading of the color analyzer to x=274, y=280. (11500 K).
5. Repeat step 3&4 until you can get the correct reading for both black and white sides.
*Notes:
A. The “SUBB” and “SubCON” items are used to assistant the white balance adjustment.
It is the same function as the user OSD menu “Brightness” and “Contrast” items. You can
adjust these items to get the expect intensity when adjusting the white balance.
B. YUV white balance black level offset setup:
It is not need to adjust the white balance for YUV mode when production, but the
BLOR-Y, BLOG-Y and BLOB-Y items which locate in EEPROM address 0x0A, 0x0B and
0x0C need to write in the right values to set the YUV mode black level offset before
production. These offset values should be written by the PE engineer when making the
EEPROM copy for the new lot with difference tube.
Table 3.4.1: The White Balance adjustment setup and option page “3”
OSD menu Default Value Description Remark
RC 32 R cut-off setting(BLOR) Adjust to right value
GC 32 G cut-off setting(BLOG) Adjust to right value
BC 32 B cut-off setting(BLOB) Adjust to right value
RD 37 R drive setting(WPR) Adjust to right value
GD 32 G drive setting(WPG) Adjust to right value
BD 37 B drive setting(WPB) Adjust to right value
BLOC 8 Black level offset course(BLOC) Adjust to right valuege
This manual suits for next models
1
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