1 WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered b electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product deal with in this service information by anyone else could result in serious injury or death. COLOR TV Model No. DX-LDVD22-10A CHASSIS: ZORAN775 2009 (Qingdao Electronics limited company) All rights reserved. Unauthorized copying and distribution is a violation of law.
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WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does
not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products
powered b electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the
product deal with in this service information by anyone else could result in serious injury or death.
COLOR TV
Model No. DX-LDVD22-10A
CHASSIS: ZORAN775
2009 (Qingdao Electronics limited company)
All rights reserved. Unauthorized copying and distribution is a violation of
law.
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CONTENTS Table of contents………………..................………………….……….2 1. General Information…………...............…………………………..4
1.1 General Guidelines................................................................................4 1.2 Important notice…………………………………………………………..…4 1.3 How to read this Service Mauna…………………………………………..5
2. SPECIFICATIONS………………………………………………….…...7
3. LOCATION OF CONTROLS AND COMPONENTS…..…..9
3.1Board Location……………………………….. ………….……………..…..9
3.2 A Board----Main Board……….………………………..…………...……....9
3.3 B Board------- (Power Board)………………………..………….... ……..14
3.4 LCD Panel……………………………….. ………..………………………14
4. Disassemble and assemble…...………..…………………….....17
4.1 Tearing down the base…..……………….…….…………..………….….17
4.2 Tearing down the plastic front cabinet…………………………..….……17
4.3 Tearing down the panel…………………………………………..........…17
4.4 Tearing down the panel joint pieces………………………………..……18
4.5 Tearing down the main board…………..………………………...………19
4.6 Tearing down the power supply….………….………………….…….….19
4.7 Tearing down the DVD….……………………….…………..………....…20
4.8 Tearing down the speaker……………………….....................…………20
4.9 Tearing down the DVD keypad assembly………………………….……21
4.10 Tearing down the rotated axis.……………………………………….…21
4.11 Tearing down the terminal board…………………………….....………22
4.12 Tearing down the keypad and remote control board…………………22
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5. INSTALLATION INSTRUCTIONS…………………………...….24
6. OPERATION INSTRUCTIONS……………………………….…..27
6.1 Front Panel Controls…………………………………………..................27
6.2 Back Panel Controls………………………………………….……….......28
6.3 Setting up Your Remote Control…………..……………………………..29
1. General Information 1.1 General Guidelines When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1) Leakage Current Cold Check 2) Leakage Current Hot Check 3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive
1.2 Important notice 1.2.1 Follow the regulations and warnings Most important thing is to list up the potential hazard or risk for the service personnel to open the units and disassemble the units. For example, we need to describe properly how to avoid the possibility to get electrical shock from the live power supply or charged electrical parts (even the power is off).
This symbol indicates that high voltage is present inside. It is dangerous to make any king of contact with any inside part of this product. This symbol indicates that there are important operating and maintenance instructions in the literture accompanying the appliance
1.2.2 Be careful to the electrical shock To prevent damage which might result in electric shock or fire, do not expose this TV set to rain or excessive moisture. This TV must not be exposed to dripping or splashing water, and objects
Filled with liquid, such as vases, must not be place on top of or above the TV 1.2.3 Electro static discharge (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such Components commonly are called Electrostatically Sensitive (ES) Devices. The following tech-niquesshouldbeusedtohelpreducetheincidenceofcomponentdamagecausedbyelectro Static discharge (ESD). 1.2.4 About lead free solder (PbF) This product is manufactured using lead-free solder as a part of a movement within the consum-er products industry at large to be environmentally responsible. Lead-free solder must be used in the servicing and repair of this product. 1.2.5 Use the genewing parts (specified parts) Special parts which have purposes of fire retardant (resistors),high-quality sound (capacitors), low noise(resistors), etc. are used. When replacing any of components, be sure to use only manufacture's specified parts shown in the parts list.
Safety Component ● Components identified by mark have special characteristics important for safety.
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1.2.6 Take Care to Deal With The Cathode-Ray Tube
In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is se-cured
against implosion. However, when removing it or serving from backward, it is dangerous to give a
shock. Take enough care to deal with it.
1.2.7 Safety Check after Repairment Confirm that the screws ,parts and wiring which were removed in order to service are put in the
original positions, or whether there are the portions which are deteriorated around the serviced
places serviced or not. Check the insulation between the antenna terminal or external metal and
the AC cord plug blades. And be sure the safety of that.
Insuration Test 1. Unplug the plug from the AC outlet.
2. Remove the antenna terminal on TV and turn on the TV. 3. Insulation resistance between the cord plug terminals and the eternal exposure metal
should be more than M ohm by using the 500V insulation resistance meter
4. If the insulation resistance is less than M ohm, the inspection repair should be required. If you have not the 500V insulation resistance meter, use a Tester. External exposure metal: Antenna terminal Headphone jack
1.2.8 Ordering Spare Parts Please include the following informations when you order parts. (Particularly the Version letter) 1. Model number and Version letter
The model number can be found on the back of each product and the Version letter can be found at the end of the serial number.
2. Part No. and Description You can find them in your service manual.
1.2.9 Photo used in this manual The illustration and photos used in this Manual may not base on the final design of products, which may differ from your products in some way.
1.3 How to read this Service Manual 1.3.1 Using Icons Icons are used to attract the attention of the reader to specific information. The meaning of each icon is
described in the table below:
Note: A “note” provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks.
Caution: A “caution” is used when there is danger that the reader, through incorrect manipulation,
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may damage equipment, loose data, get an unexpected result or has to restart(part of) a procedure.
Warning: A “warning” is used when there is danger of personal injury.
Reference:
A “reference” guides the reader to other places in this binder or in this manual, where he/she will find additional information on a specific topic.
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2. Specification Screen Size 21.6" Display Type LCD
RF Input (back) Yes (SIDE BACK) Earphone Jack Location (side or back) side (1) (SIDE BACK)
Watts/Channel (Min at 10% THD) 3W x 2 Sound Leveler Yes
Audio-only (panel off) Yes MTS/SAP Yes
Mono or Stereo Speaker Stereo IR/RF IR
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Power Light On-Green; Off-red Power: AC 120volt/60Hz Yes
DVD Player Yes
Optical Disk Playback Support DVD Video/-R/-RW/+R/+RW/CD-R/-RW/JPEG
Photo DVD video interface to TV Component - Progressive
PC Input Max, Resolution (match panel) 1360*768 OSD Style Simple-standardized
OSD Languages (Eng/Fre/Spa/Mand) Eng/Fre/Spa Multi-Lingual Manuals (combined or divided) Combined
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3. LOCATION OF CONTROLS AND COMPONENTS 3.1. Board Location
No. Description A Board Main Board B Board Power supply Board C DVD D Speaker
3.2. A Board----Main Board
3.2. 1 Function Description:
Main Board:
A Board
D
B Board C DVD
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Process signal which incept from exterior equipment,then translate into signal that panel can display.
3.2.2 Connector definition
Main board connector
LVDS Connector (CN8)
PIN 1
11
Power supply and Inverter Connector(CN3)
Pin number Signal name Description 1 NC NC 2 NC NC 3 NC NC 4 NC NC 5 LVDS_D0E_N LVDS EVEN 0 - Signal 6 LVDS_D0E_P LVDS EVEN 0 + Signal 7 GND Ground 8 LVDS_D1E_N LVDS EVEN 1 - Signal 9 LVDS_D1E_P LVDS EVEN 1 + Signal
10 GND Ground 11 LVDS_D2E_N LVDS EVEN 2 - Signal 12 LVDS_D2E_P LVDS EVEN 2 + Signal 13 GND Ground 14 LVDS_CE_N LVDS EVEN Clock - Signal 15 LVDS_CE_P LVDS EVEN Clock + Signal 16 GND Ground 17 LVDS_D3E_N LVDS EVEN 3 - Signal 18 LVDS_D3E_P LVDS EVEN 3 + Signal 19 GND Ground 20 NC NC 21 NC NC 22 NC NC 23 GND Ground 24 GND Ground 25 GND Ground 26 Panel_power Power for panel 27 Panel_power Power for panel 28 Panel_power Power for panel 29 Panel_power Power for panel 30 Panel_power Power for panel
PIN 1
12
Pin number Signal name Description 1 ON/OFF Preparative switch control
2 GND Ground 3 GND Ground
4 ADJ INVERTER Lightness Adjust
5 BLON INVERTER Switch Control
6 +12V 12V Power
7 +12V 12V Power
Audio Output Connector(CN1)
Pin
number Signal name Description 1 LSPK Left Audio Output 2 GND Ground 3 GND Ground
1 STB stand by 2 5V 5V Power 3 GND Ground 4 GND Ground 5 12V 12V Power
DVD Video Connector (CN6)
Pin number Signal name Description
1 DVD_SW DVD自动跳转 2 DVD_PB Pb Signal 3 DVD_Y Y Signal 4 GND Ground 5 DVD_PR Pr Signal 6 GND Ground 7 DVD_IR IR control
DVD Audio Connector (P1)
Pin
number Signal name Description 1 DVD_L_IN Left track 2 DVD_R_IN Right track 3 GND Ground
PIN 1
PIN 1
PIN 1
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3.3.B Board------- (Power Board) Supply power for Main board and Panel
Power supply and Inverter Connector(CN10)
Pin number Signal name Description 1 NC
2 GND Ground
3 GND Ground
4 BL-ADJUST INVERTER Lightness Adjust
5 BL-ON/OFF INVERTER Switch Control
6 +12V 12V Power
7 +12V 12V Power Other Connector AC150V~AC240V Input (CN15) Power supply for panel (CN11) Power supply for panel (CN12) Power supply for panel (CN13) Power supply for panel (CN14)
3.4. LCD PANEL.
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Connector definition
16
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4. Disassemble and assemble
4.1 Tearing down the base
4.2 Tearing down the plastic front cabinet
4.3.1 Tearing down the panel
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4.3.2 Tearing down the panel
4.4 Tearing down the panel joint pieces
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4.5 Tearing down the main board
4.6 Tearing down the power supply
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4.7 Tearing down the DVD
4.8 Tearing down the speaker
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4.9 Tearing down the DVD keypad assembly
4.10 Tearing down the rotated axis
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4.11 Tearing down the terminal board
4.12 Tearing down the keypad and remote control board
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5. INSTALLATION INSTRUCTIONS Accessories
Remote Control User Manual Battery
25
26
27
6. OPERATION INSTRUCTIONS Basal information
6.1 Front panel controls
28
6.2 Back panel controls
29
6.3 Setting up Your Remote Control
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7. MEASUREMENTS AND ADJUSTMENTS The way to the factory mode menu: First: press menu, Second: choose the AUDIO, Third: input 8893. Finished these operations, system will be into the factory mode menu. Press to select articles, and then press the Right or enter button to sub-menu.
Software Upgrade
White Balance/Color Temp
31
Picture Mode Setting
Audio Mode Setting
32
SSPLL Setting
IF you want to exit this factory menu, please press the button” Exit” in the remoter.
Verify if the television is properly plugged Verify if the television is properly supplied power Verify if electricity is available
Blank screen
Verify if correct signals are input Press INPUT button to change signal input to TV input Restart the television of power supply is interrupted
No sound
Press Mute button and verify if Mute mode is set. Switch to other channel and verify if the same problem happens. Press VOL+ button to see of he problem can be solved.
Poor sound Verify if sound system is correct .Refer to some chapter for adjust.
No picture in some channel
Verify if correct channel is selected. Adjust the antenna. Make adjustments by Fine Tune and MANUAL Scan.
No color for some channel program(black and white)
Verify if the same problem exists in other channels. check out of picture and sound system. Refer to relative instructions in the Manual for color adjusts.
Spots with some or all pictures Verify if the antennal is correctly connected. Verify if the antennal is in good condition. Make fine adjustment of channel.
Horizontal/vertical bars or picture shaking
Check for local interference such as an electrical appliance or power tool.
Television out of control
Disconnect the television from power supply and 10 seconds later, connect the television to the power supply. If the problem still exists, contact authorized after-sales service for technical assistance.
9.2 Power Supply Board failure check
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9.3 Main board failure check
State: No power First, check cables which connect with PSU, then check as follows 1) Check PSB input voltage(AC input) voltage : ~120V Connector: CN13 2)Check PSB output voltage orderly: Voltage: +12V, +12V Connector: CN10
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State:No picture
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9.4 Panel failure
Failure Mode
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Part Name Description Phenomena Failure cause
V B/D Vertical bar
V Dim Vertal gray
line
V L/D
Vertical color
line(light or
dark forever)
H B/D Horizontal
bar
H Dim Horizontal
gary line
TCP
H L/D
Horizontal
line(light or
dark forever)
Block Defect :TCP cracking or cracking
Dim or L/D :TCP Sunken
:TCP lead cracking
:ACF bonding short
:Awful environment and something electric enter into
LCD
:Mis-align between TCP and Panel
:Panel failure
:TCP failure
Failure Mode
Part Name Description Phenomena Failure cause
Dot Defect Bright dot dark
dot in panel
Incoming Inspection Standard
Polarizer
Bubble
Bladder in
Polarizer
Bladder between Polarizer and top glass
Polarizer
Scratch Polarizer Scratch
Tine or rigidity arose
Panel or Polarizer
F/M inside
Polarizer
Eye winker inside
Polarizer
Eye winker inside Polarizer
Abnormal
Display Abnormal Display
Circuit
Flashing Bright and dark
display alternately
1. Chip lose action 2. IC ahort or jointiog bad 3. Pannel and vsc connect bad
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Failure Mode
Part Name Description Phenomena Failure cause
White
Screen
B/L normal, only
white screen
display
Black
Screen
B/L normal, only
Black screen
display
Maybe caused by surge current and EDS
FIIcker Crosstalk
LCD Vcom imbalance
Abnormal
Color
Only color
abormal
Capacitance improper bring crosstalk inside LCD
panel
Circuit
Abnormal
Color
Only color
abnormal
1. Chip lose action 2. IC short or jointion bad 3. Pannel and vsc connect bad
Failure Mode
Part Name Description Phenomena Failure cause
Mechanlcal
Nolse
When turn
panel,appear
cacophony
Caused by Mechanica noise of backlight unit
Ripple Connectric circle
Causeed by between mechanism and pannel
B/L off B/L lose action *Connect badness between wire and electrode
B/L dark B/L brightness
darker than normal
*Connect badness Short between wire and electrode
B/L wire
damaged B/L wire damaged Operation abnormal or systemic noise
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B/L wire
open Without backlight Operation abnormal or systemic noise