This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Published by MW 0767 BU CD Customer Service Printed in the Netherlands Subject to modification EN 3122 785 16910
Contents Page1. Technical Specifications, Connections, and Chassis
Overview 22. Safety Instructions, Warnings, and Notes 33. Directions for Use 44. Mechanical Instructions 55. Service Modes, Error Codes, and Fault Finding 86. Block Diagrams, Test Point Overviews, and
Waveforms 97. Circuit Diagrams and PWB Layouts 98. Alignments 99. Circuit Descriptions, Abbreviation List, and IC Data
Sheets 910. Spare Parts List 911. Revision List 9
Technical Specifications, Connections, and Chassis OverviewEN 2 LCD CPT 2K71.
1. Technical Specifications, Connections, and Chassis Overview
Index of this chapter:1.1 Introduction1.2 Specifications
Note:• Specifications are indicative (subject to change).
1.1 Introduction
In this Service Manual you will find all necessary information to perform the Board Level Repair (= board swap) scenario on LCD panels. These LCD repair manuals are created per brand, and they will contain all necessary information for the different panels used in Philips flat LCD TVs.
1.2 Specifications
Below find attached the data sheets of the different LCD panels. Click on the “model number” to open.• Model CLAA320WB02P
Safety Instructions, Warnings, and Notes EN 3LCD CPT 2K7 2.
2. Safety Instructions, Warnings, and Notes
Index of this chapter:2.1 General2.2 Safety Precautions2.3 Servicing Precautions
2.1 General
Notes:• Only authorised persons should perform servicing of this
module.• When using/handling this unit, pay special attention to the
LCD Module: it should not be enforced into any other way then next rules, warnings, and/or cautions.
• "Warning" indicates a hazard that may lead to death or injury if the warning is ignored and the product is handled incorrectly.
• "Caution" indicates a hazard that can lead to injury or damage to property if the caution is ignored and the product is handled incorrectly.
2.2 Safety Precautions
2.2.1 Warning
• Do not supply a voltage higher than specified to this product. This may damage the product or can create hazardous situations.
• Do not use this product in locations where the humidity is extremely high, where it may be splashed with water, or where flammable materials surround it.
• Do not install or use the product in a location that does no satisfy specified environmental conditions. This may damage the product or can create hazardous situations.
• If a foreign substance (such as water, metal, or liquid) gets inside the product, immediately turn “OFF” the power. Continuing to use the product may cause electric shock or can create hazardous situations.
• If the product emits smoke and abnormal smell, or makes an abnormal sound, immediately turn “OFF” the power. Continuing to use the product may cause electric shock or can create hazardous situations.
• Do not (dis)connect the connector while power to the product is “ON”. It takes some time for the voltage to drop to a sufficiently low level after the power has been turned “OFF”. Confirm that the voltage has dropped to a safe level before (dis)connecting the connector.
• Do not pull out or insert the power cable from/to an outlet with wet hands. It may cause electric shock.
• If the power cable is damaged, or if the connector is loose, do not use the product, otherwise, this can lead to hazardous situations or may cause electric shock.
• The LCD Backlight Inverter unit uses a high voltage for the lamps. Keep the cautions concerning electric shock and do not touch the device circuitry handling the inverter unit. And because the capacitors of the device circuitry may remain charged at the moment of Power “OFF”, standing for 1 minute is required in order to discharge the device circuitry.
2.2.2 Caution
• Do not place this product in a location that is subject to heavy vibration, or an unstable surface such as an inclined surface. The product may fall off or fall over, causing injuries.
• Before disconnecting cable from the product, be sure to turn off the power. Be sure to hold the connector when disconnecting cables. Pulling a cable with excessive force may cause the core of the cable to be exposed or break the cable, and this can lead to fire or electric shock.
• This product contains glass. If shock, vibration, heat or distortion is applied to the product, the glass may be broken.
• If glass surface of the display breaks or is scratched, do not touched the broken pieces or the scratched with bare hands. You may be injured.
• LCD Module requires to be handled with special care. LCD Module is not to be touched with metal or hard materials. Must not be stressed by heat or mechanical impact.
• There are some particular components on the rear panel of this product. Skin contact with these components may cause an electric shock. So, handle with care.
• While moving the product, be sure to turn off the power, disconnect all cables and watch your step. Dropping the product may cause injuries from electric shock. So, while moving the product handle with care.
• When cleaning the panel is necessary, wipe it with a soft and moistened cloth a neural detergent. Caution on connector area. Do not use chemicals such as thinner or benzene.
• LCD Module emits heat from the Lamp, Backlight lamp, and component parts. Therefore, the environmental temperature must not exceed 50 deg. C. LCD Module Backlight Inverter system is driven by high voltage, so it must avoid conductive materials.
• If repairing components with a lead line, high voltage or high temperature components must be put out from a lead line and fix.
• Do not place an object on the surface of the display. The glass may break or be scratched.
• This product may be damaged if it is subject to excessive stresses (such as excessive voltage, current, or temperature). The absolute maximum ratings specify the limits of these stresses.
• Do not cover or wrap with any covering materials while power is applied to the product.
• This product is made from various materials such as glass, metal, and plastic. When discarding it, be sure to contact a purchase place.
• If a discrepancy occurs due to any arbitrary modification or disassembly, supplier is not responsible for function, quality or other items.
• Within the warranty period, general faults may be charged for depending on responsibility for the faults. You handle with care
2.3 Servicing Precautions
A colour TFT LCD Module can easily be damaged by both electrical and mechanical stresses. Users therefore, are requested to follow the “Servicing precautions of colour TFT LCD Module” on the following.
2.3.1 System Assembler
• Follow the power sequence: An abnormal power sequence may cause critical malfunction or electrical damage.
• Prevent physical stress.• Prevent overheat:
– High temperatures on the surface of the screen may cause poor quality. Please use the LCD Module on the specified temperatures.
– Low temperatures (under 10 deg. C) makes the LCD Module respond slowly, make the Backlight worse operated, and will shorten very much the lifetime accordingly.
• Keep LCD Module dust-free: The LCD Module is sensitive against dust; it can cause visual or functional problems.
Directions for UseEN 4 LCD CPT 2K73.
• Do not touch TCP area: Do not touch TCP area at any case. It can cause Driver IC cracks, film cracks, etc. The TCP is the weakest point of the LCD Module.
• Do not pull Backlight wire: Please do not pull the Backlight wire, as it can cause the wire to become disconnected or damaged.
• Check the connections of the Inverter & Backlight connectors: Incomplete connection can cause burnt in Backlight connectors or damage the inverter.
• Handle with care:– Please do not drop, bend, or hit the LCD Module.– Physical stress can cause defects as broken panels.
• Keep mounting screw length and motor driver’s torque: Strong motor driver’s torque can make a mechanical defect on LCD Module. Please keep within the specifications.
• Do not operate for a long time under the same pattern: Operating the LCD Module for a long time with the same video pattern can cause image persistence and can eventually damage it.
• Defective panels must also be handled with care:– To prevent making other defects, please handle the
defective LCD Module as a good one.– Defective LCD Modules must be repaired.
• Do not stack LCD Modules: The LCD Module consists of fragile components such as TCPs or Glasses. Stacking the LCD Modules can cause undesired defects.
• Do not provide strong pressure at connecting: Strong pressure can transfer the force to the TCP, which is the weakest part of the LCD Module. It eventually can make the TCP crack or lead to other unexpected defects.
• Let the Backlight Wire at the backside of the LCD Module: If let the Backlight wire in front of the LCD Module, the Backlight connector can hurt the surface of the polariser.
• Never (dis)connect at power “ON”: The LCD Module consists of CMOS components, which are known as weak components against EOS. It can damage the product.
• Electro-static discharge can make damage:– Semi-assembled product should be handled with wrist
strap.– Earth human body when handle the LCD Module.– Please do not touch the interface connector pin.
2.3.2 System Assembler/End User
• Keep clean the surface: – Please wear rubber gloves when you touch the surface
of the LCD Module screen.– Please use soft and anti-static material with n-Hexane
as cleaner.• Be careful not to make polariser scratch:
– Surface of polariser is soft, so it’s easily scratched.– Please do not touch, press or rub on polariser surface
with materials over HB hardness.• Be careful with swift temperature and humidity
changes: Swift temperature and or humidity change can make dew condensation or ice, which can cause non-conformance such as malfunctioning.
• Keep out of water:– Water on in the LCD Module can cause electrical short
or corrosion.– Please wipe out or dry water carefully.
• Keep the LCD Module free from corrosive gasses: Corrosive gas can chemically damage the polariser and the circuitry parts and eventually will cause defects.
• Keep the suitable temperature and humidity: High temperatures and high humidity will shorten the lifetime
3. Directions for Use
Not applicable.
Mechanical Instructions EN 5LCD CPT 2K7 4.
4. Mechanical Instructions
Index of this chapter:4.1 General4.2 Model CLAA320WB02P
4.1 General
4.1.1 Warnings
• Figures can deviate due to the different module executions.• During repair, place the set face down on a soft surface
(e.g. on foam bars as mentioned in next paragraph), in order to prevent damaging the display.Note: With some chassis, it is possible to measure and replace the boards while the TV is still on its stand.
• All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD �). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential.
Figure 4-1 ESD wristband
• Be careful during measurements in the high voltage section. Never pull plugs out under operation conditions, just to prevent danger caused by electrical sparks.
• Never replace modules or other components while the unit is switched “on”.
• Connectors “to” and “from” the Inverter Boards must be thoroughly connected to avoid any electrical sparks during operation.
4.1.2 Foam Bars
Figure 4-2 Foam bars
The foam bars (order code 3122 785 90580 for two pieces) can be used for all types and sizes of flat displays. See figure “Foam bars” for details. Displays with a size of 42” and larger, require four foam bars [1]. Ensure that the foam bars are always supporting the cabinet and never only the display.Caution: Failure to follow these guidelines can seriously damage the display!By laying the TV face down on the (ESD protective) foam bars, a stable situation is created to perform measurements and alignments. By placing a mirror under the display, you can monitor the screen.
4.1.3 Torque Values
Table 4-1 Recommended Torque Values
H_16920_001.eps060407
Screw Type (cross head) Recommended Torque Value
M2 2.0 kg*F ± 0.1 kg*F
M2.5 3.0 kg*F ± 0.5 kg*F
M2.6 3.0 kg*F ± 0.5 kg*F
M3 6.0 kg*F ± 0.5 kg*F
E_06532_018.eps171106
1
Required for sets42"
1
Mechanical InstructionsEN 6 LCD CPT 2K74.
4.2 Model CLAA320WB02P
4.2.1 Control Board
Disassembly1. Place the panel face down on the foam bars, and locate the
Control board.
Figure 4-3 Control board location
2. Remove the four screws of the metal cover: start with the right-down one, then the left-up, one, then the right-up one and finally the left-down one and lift the cover from the Control board.
Figure 4-4 Cover screws removal
3. Carefully disconnect the flat cable/FPCs from their connectors.
Figure 4-5 Unplug FPCs
4. You can now remove the Control Board.
ReassemblyTo reassemble, perform all processes in reverse order. Important: Be sure to insert the FPCs correctly: the white line must be invisible when inserted correctly (see figure below).
Figure 4-6 Correct FPC insertion
H_16900_018.eps260607
H_16910_002.eps260607
H_16910_003.eps260607
H_16900_007.eps110707
Mechanical Instructions EN 7LCD CPT 2K7 4.
4.2.2 Inverter Board
Disassembly
1. Place the panel face down on the foam bars, and locate the Inverter board.
2. Remove the cover screws.
Figure 4-7 Remove Inverter cover
Figure 4-8 Remove Inverter cover screws
3. Unplug the lamp connectors on the inverter. Start at the top, and be careful not to pull and drag the wires. The use of a pair of pliers can be helpful.
Figure 4-9 Remove Inverter connectors
Figure 4-10 Remove Inverter board
4. You can now remove the Inverter board.
ReassemblyTo reassemble, perform all processes in reverse order.
H_16910_004.eps270607
H_16910_005.eps270607
H_16910_006.eps270607
H_16910_007.eps270607
Service Modes, Error Codes, and Fault FindingEN 8 LCD CPT 2K75.
5. Service Modes, Error Codes, and Fault Finding
Index of this chapter:5.1 Service Modes5.2 Error Codes5.3 Fault Finding
5.1 Service Modes
Not applicable.
5.2 Error Codes
Not applicable.
5.3 Fault Finding
Figure 5-1 Symptom/Cure overview
- Exchange Inverter : Case.15 ~ Case18 (Back light No light / dim light left,right,center)
- Exchange Control Board : Case.1 ~ Case14 (Abnormal display / No display /Noise)
H_16890_004.eps120707
Block Diagrams, Test Point Overviews, and Waveforms EN 9LCD CPT 2K7 6.
6. Block Diagrams, Test Point Overviews, and Waveforms
Not applicable.
7. Circuit Diagrams and PWB Layouts
Not applicable
8. Alignments
Not applicable.
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.1 Circuit Descriptions
Not applicable
9.2 Abbreviation List
AUO Acer Unipack Optronics (supplier)CCFL Cold Cathode Fluorescent LampCMO Chi Mei Optoelectronics (supplier)CPT Chunghwa Picture Tubes (supplier)COF Chip On Flex / Foil / FilmCPT Chunghwa Picture Tubes (supplier)DC Direct CurrentFET Field Effect TransistorFFC Flat Foil CableFPC Flexible Printed CircuitIC Integrated CircuitLCD Liquid Crystal DisplayLCM Liquid Crystal ModuleLED Light Emitting DiodeLPL LG Philips LCD (supplier)PCB Printed Circuit Board (same as PWB)PSU Power Supply UnitPWB Printed Wiring Board (same as PCB)RGB Red, Green, Blue colour spaceTCP Tape Carrier Package
9.3 IC Data Sheets
Not applicable
10. Spare Parts ListPlease refer to the Philips Service website, for an actual overview (monthly updated).
11. Revision ListManual xxxx xxx xxxx.0• First release.
CLAA320WB02P is 32” color (80.04cm) TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel, LVDS driver ICs, control circuit, backlight, and inverter. By applying 8 bit digital data, 1366*768, 16.7 million-color images are displayed on the 32” diagonal screen.The panel meets the regulation of RoHs.General specification are summarized in the following table:
1.1 GENERAL INFORMATION
ITEM SPECIFICATION UNIT
Display Area 697.68 (H) × 392.25 (V) (31.51 inch diagonal) mm
Number of Pixels 1366 (H) × 768 (V) 16:9
Pixel Pitch 0.51075 (H) × 0.51075 (V) mm
Color Pixel Arrangement RGB Vertical Strip
Display Mode Normally Black
Number of Colors 16.7M (8bit) color
Surface Treatment Hard coating: 3H , Haze:26% Anti-GlareTreatment of the front polarizer. <Reflection :4 %>
Total Module Power 102 (typ) W
1.2 MECHANICAL INFORMATION ITEM MIN TYP. MAX. UNIT
Horizontal (H) 759.0 760.0 761.0 mm
Vertical (V) 449.0 450.0 451.0 mm Module outline
dimension Depth (D) with inverter 46.0 47.0 48.0 mm
2. ABSOLUTE MAXIMUM RATINGS The following are maximun values which, if exceeded, may cause faulty operation or damage to the unit.
ITEM SYMBOL MIN. MAX. UNIT REMARK Power Supply Voltage For LCD VCC -0.3 15.0 V Input Voltage of Inverter VBL -0.3 27.0 V Invert Dimming PDIM -0.3 5.0 Vdc BL on/off ON/OFF -0.3 5.0 Vdc ESD for Connector VESD -250 250 V ESD for Module VESD -15 15 KV Operation Temperature (Surrounding) Top 0 50 ℃ *1) *2) *3) *4)Storage Temperature Tstg -20 60 ℃ *1) *2) *3) *4)Storage Humidity Hst 90 % *1) [Note] *1) The relative temperature and humidity range are as below sketch, 90%RHMax. (Ta 40 )≦ ℃ *2) The maximum wet bulb temperature 39 (Ta≦ ℃ >40 ) and wi℃ thout dewing. *3) If you use the product in a environment which over the definition of temperature and humidity
too long to effect the result of eye-atching.
*4) If you operate the product in normal temperature range, the center surface of panel should be under 60 .℃
*3) The specified power supply current is under condition at Vcc=12V, Ta=25+/-2℃, fv=60Hz, whereas a power dissipation check pattern below is displayed.
a. White pattern b. Black pattern c. RGB Stripe pattern
T1 0.47 --- 30 ms T2 0.5 --- 50 ms T3 0 --- 50 ms T4 1000 --- --- ms T5 200 --- --- ms T6 200 --- --- ms T7 0.01 --- 300 ms
Notes: *1) Please avoid floating state of interface signal at invalid period. *2) When the interface signal is invalid, be sure to pull down the power supply for LCD to 0V. *3) Lamp power must be turn off after power supply for LCD interface signal valid.
Table 2 .VCC-dip State: 1) When 9V VCC≦ <10.8 V, td 10 ms.≦ 2) VCC > 10.8V, VCC-dip condition should also follow the VCC-turn-off condition.
When lamp luminance redue to 50% or lower than its initial value.
*2) Ripple voltage that occur at the instant of power-on can’t exceed 30V. *3) 25℃; ADIM=1.6V or Open and PDIM 100% Duty , after power on for 30 Minutes.
(Inverter Connecter CN1, Pin#11)
* 4) Duty Signal Input with 3.3V TTL specification.
[Note] *1) T1 describes rising time of 0V to 24V and is not applied at restarting time.
*2) When the Inverter is shut-down by ARC protection, T3 need 3.3sec *3) When VBL (24V) is supplied always, there is no reliability problem. *4)PDIM should be duty 100% in T4 section and ADIM recommend 1.65V.
a)Connector(Receptacle): S14B-PH-SM3-TB(JST) or compatible. b)Mating connector(Plug): PRH-14(JST) or compatible.
Pin no Symbol Description Note
1 VBL Supply Voltage 24V
2 VBL Supply Voltage 24V
3 VBL Supply Voltage 24V
4 VBL Supply Voltage 24V
5 VBL Supply Voltage 24V
6 GND Ground
7 GND Ground
8 GND Ground
9 GND Ground
10 GND Ground
11 ADIM(1) GND (0V) 80% / Open (1.6V) 100% / High (3.3V) 120%, Luminance
(1) Input impedance: > 50Kohm
12 ON/OFF BL On-Off: Open/High (3.3V) for BL On as default
Input impedance: > 50Kohm
13 PDIM(2) PWM Dimming: Open/High (3.3V, 100% Duty) for 100%
(2) Input impedance: > 50Kohm
14 GND GND
[Note]: *1) ADIM is control signal for Inverter’s output Power to Back Light Lamp Bulb. Input Signal should
be able to control Amplitude of Inverter Output voltage. From 0V to 3.3V, Inverter Output Voltage should be able to vary to control Brightness of Lamp from 80% to 120% Luminescence variation. Approx. 1.6V might be 100% Luminance control point.
*2) PDIM is PWM duty control Input for +3.3V TTL Level Signal. This Input Signal is Continuous
Pulse Signal with +3.3V, TTL Level Signal Spec. If this is NC or +3.3V, 100% Duty (i.e. +3.3V, DC level), Back Light should perform 100% Luminance. Duty Ratio of this Input signal should be proportional relationship in certain range of control without any kind of inherent side effect like Waterfall effect on Screen. Guaranteed Duty Range and Dimming Ratio should be specified with supplementary measurement result.
BACKLIGHT UNIT Lamp connector HV: BHR-02VS-1(JST)*8 or compatible Mating connector:SM02(8.0)B-BHS-1-TB(JST) or compatible LV1:BHR-02VS-1(JST)*1 or compatible Mating connector:SM02(8.0)B-BHS-1-TB(JST) or compatible
(1) Front side ( include inverter,if the sizes of a panel don’t show the differential value,please follow the values show as differential range table. )
(2) Rear side ( include inverter,if the sizes of a panel don’t show the differential value,please follow the values show as differential range table. )
Color Gamut CG -- 75 -- % *7) ※Definition of the ( . ) : The value is variation
[Note] These items are measured using:BM-5A (TOPCON) View Angle:EZ contrast XL-88,Response Time:Westar TRD-100 [ under the dark room condition (no ambient light). ] Definition of these measurement items is as follows: *1) Definition of Contrast Ratio:
CR=ON (White) Luminance/OFF (Black) Luminance *2) Definition of Luminance and Luminance uniformity and Contrast and the Deviation of Color
Luminance and Contrast:To measure at the center position “5” on the screen (NO.5),see Fig.8-1 below.
Luminance Uniformity:Lw (MAX) and Lw(MIN) are the maximum and minimum luminance value measure at the position “1~5” on the screen (NO.1~5),see Fig.8-1 and below show equation: ∆Lw=[Lw(MIN)] / Lw(MAX) ] × 100%
he Deviation of Color Coordinate:To measure at the position “1~5” on the screen (NO.1~5),see Fig.8-1 below.
Figure 8-3. Definition of Response Time ( White – Black )
*5) Definition of Response Time ( Gray to Gray Average )
L u m in a n ce
9 0 %9 0 %
1 0 %t r g t fg
(G r a y S ca le L e ve l)
(0 ~ 2 5 5 t h )
(0 ~ 2 5 5 t h ) 1 0 %
Figure 8-4. Definition of Response Time ( Gray Scale Level )
The driving signal time means the signal of gray level 0、16、32、48、64、80、96、112、128、144、160、176、192、208、224、240、255.
Gray to Gray Average means the average switching time of gray level 0、16、32、48、64、80、96、112、128、144、160、176、192、208、224、240、255 to each other.
The LCD module should be stabilized at given temperature for 1 hour to avoid abrupt temperature change during measuring. In order to stabilize the luminance,the measurement should be executed after lighting backlight for 1 hour in a windless room.
*6) Definition of Cross Talk Ratio: CMR = MAX ( ( | ( LB1-LA ) / LA | ) × 100﹪ , ( | (LB2 – LA ) / LA| ) × 100﹪ )
‧LA: Pattern A(Half-Tone pattern) Measure point Luminance
‧LB1,LB2: Pattern B1、Pattern B2 Measure point Luminance
Figure 8-6. The pattern of cross talk test *7) Definition of Color Gamut:
To measure RGB three sub-pixels color gamut coordinate at CIE coordinate chart from the center of module , to form a triangle area = ARGB. RGB three sub-pixels of NTSC at CIE coordinate chart to form a triangle area = NRGB.
*8) Definition of Central Luminance:
After lighting on the panel 30 mins, you can proceed the Central Luminance testing. The definiton of Typ value is under status of Inverter Dimming Voltage=3.3V.
High Temperature storage test Ta=60°C 90%RH 240 hours
Low Temperature storage test Ta=-20°C 240 hours
High Temperature operation test Ta=50°C 90%RH 240 hours
Low Temperature operation test Ta=0°C 240 hours
Vibration Test (Non-Operating)
Waveform:Random Vibration level:9.8m/s2(1.0G) zero to peak Frequency range:10 - 500 Hz Duration: X,Y,Z, 10 min,total 30 mins One time in each direction
Shock Test (Non-Operating)
Shock level:980m/s2(100G) Waveform:half sine wave, 2ms Direction: ±X, ±Y, ±Z One time in each direction.
(2) Judgment standard
The judgment of the above test should be made as follow: Pass: Normal display image with no obvious non-uniformity and no line defect.
Partial transformation of the module parts should be ignored. Fail: No display image, obvious non-uniformity, or line defects.
12. HANDLING PRECAUTIONS FOR TFT-LCD MODULE Please pay attention to the followings in handling TFT-LCD products; 12.1 ASSEMBLY PRECAUTION
(1) Please use the mounting hole on the module side in installing and do not beading or wrenching LCD in assembling. And please do not drop, bend or twist LCD module in handling.
(2) Please design display housing in accordance with the following guidelines. • Housing case must be destined carefully so as not to put stresses on LCD all sides and not to
wrench module. The stresses may cause non-uniformity even if there is no non-uniformity statically.
• Keep sufficient clearance between LCD module back surface and housing when the LCD module is mounted. Approximately 1.0 mm of the clearance in the design is recommended taking into account the tolerance of LCD module thickness and mounting structure height on the housing.
• When some parts, such as, FPC cable and ferrite plate, are installed underneath the LCD module, still sufficient clearance is required, such as 0.5mm. This clearance is, especially, to be reconsidered when the additional parts are implemented for EMI countermeasure.
• Design the inverter location and connector position carefully so as not to give stress to lamp cable, or not to interface the LCD module by the lamp cable.
• Keep sufficient clearance between LCD module and the others parts, such as inverter and speaker so as not to interface the LCD module. Approximately 1.0mm of the clearance in the design is recommended.
(3) Please do not push or scratch LCD panel surface with any-thing hard. And do not soil LCD panel surface by touching with bare hands. (Polarizer film, surface of LCD panel is easy to be flawed.)
(4) Please do not press any parts on the rear side such as source TCP, gate TCP, control circuit board and FPCs during handling LCD module. If pressing rear part is unavoidable, handle the LCD module with care not to damage them.
(5) Please wipe out LCD panel surface with absorbent cotton or soft clothe in case of it being soiled. (6) Please wipe out drops of adhesives like saliva and water on LCD panel surface immediately. They
might damage to cause panel surface variation and color change. (7) Please do not take a LCD module to pieces and reconstruct it. Resolving and reconstructing
modules may cause them not to work well. (8) Please do not touch metal frames with bare hands and soiled gloves. A color change of the metal
frames can happen during a long preservation of soiled LCD modules. (9) Please pay attention to handling lead wire of backlight so that it is not tugged in connecting with
inverter. 12.2 OPERATING PRECAUTIONS
(1) Please be sure to turn off the power supply before connecting and disconnecting signal input cable. (2) Please do not change variable resistance settings in LCD module. They are adjusted to the most
suitable value. If they are changed, it might happen LCD does not satisfy the characteristics specification.
(3) Please consider that LCD backlight takes longer time to become stable of radiation characteristics in low temperature than in room temperature.
(4) A condensation might happen on the surface and inside of LCD module in case of sudden change of ambient temperature.
(5) Please pay attention to displaying the same pattern for very long time. Image might stick on LCD. If then, time going on can make LCD work well.
(6) Please obey the same caution descriptions as ones that need to pay attention to ordinary electronic parts.
12.3 PRECAUTIONS WITH ELECTROSTATICS (1) This LCD module use CMOS-IC on circuit board and TFT-LCD panel, and so it is easy to be
affected by electrostatics. Please be careful with electrostatics by the way of your body connecting to the ground and so on.
(2) Please remove protection film very slowly on the surface of LCD module to prevent from electrostatics occurrence.
12.4 STORAGE PRECAUTIONS
(1) When you store LCDs for a long time, it is recommended to keep the temperature between 0℃ ~40℃ without the exposure of sunlight and to keep the humidity less than 90%RH.
(2) Please do not leave the LCDs in the environment of high humidity and high temperature such as 60℃ 90%RH.
(3) Please do not leave the LCDs in the environment of low temperature; below -20℃. 12.5 SAFETY PRECAUTIONS
(1) When you waste LCDs, it is recommended to crush damaged or unnecessary LCDs into pieces and wash them off with solvents such as acetone and ethanol, which should later be burned.
(2) If any liquid leaks out of a damaged-glass cell and comes in contact with the hands, wash off throughly with soap and water.
12.6 OTHERS
(1) A strong incident light into LCD panel might cause display characteristics' changing inferior because of polarizer film, color filter, and other materials becoming inferior. Please do not expose LCD module direct sunlight Land strong UV rays.
(2) Please pay attention to a panel side of LCD module not to contact with other materials in preserving it alone.
(3) For the packaging box, please pay attention to the followings: • Packaging box and inner case for LCD are designed to protect the LCDs from the damage or
scratching during transportation. Please do not open except picking LCDs up from the box. • Please do not pile them up more than 3 boxes. (They are not designed so.) And please do not
turn over. • Please handle packaging box with care not to give them sudden shock and vibrations. And also
please do not throw them up. • Packing box and inner case for LCDs are made of cardboard. So please pay attention not to get
them wet. (Such like keeping them in high humidity or wet place can occur getting them wet.)