LG LM-270WQ1-SDA2 Service manual
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LM270WQ1
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
(●●●●) Final Specification
BUYER
www.jxlcd.com
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APPROVED BY
/
/
APPLE
K23MODEL
SIGNATURE
DATE
27.0” QHD TFT LCDTitle
LG Display Co., Ltd.SUPPLIER
LM270WQ1*MODEL
SDA2SUFFIX
*When you obtain standard approval,
please use the above model name without suffix
APPROVED BY
J H Park / G.Manager
REVIEWED BY
S J So / Manager
SIGNATURE
DATE
/
Please return 1 copy for your confirmation with
your signature and comments.
Ver. 1.0 SEP. 16. 2009
PREPARED BY
S R Yoo / Engineer
MNT Products Engineering Dept.
LG Display Co., Ltd.
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LM270WQ1
Liquid Crystal Display
Product Specification
Contents
ITEMNo
COVER
CONTENTS
RECORD OF REVISIONS
GENERAL DESCRIPTION1
ABSOLUTE MAXIMUM RATINGS2
ELECTRICAL SPECIFICATIONS3
ELECTRICAL CHARACTREISTICS3-1
INTERFACE CONNECTIONS3-2
SIGNAL TIMING SPECIFICATIONS3-3
SIGNAL TIMING WAVEFORMS3-4
COLOR INPUT DATA REFERNECE3-5
POWER SEQUENCE3-6
OPTICAL SFECIFICATIONS4
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MECHANICAL CHARACTERISTICS5
Page
1
2
4
6
8
9
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11
13
14
15
16
19
25
RELIABLITY6
INTERNATIONAL STANDARDS7
SAFETY7-1
EMC7-2
PACKING8
DESIGNATION OF LOT MARK8-1
PACKING FORM8-2
PRECAUTIONS9
MOUNTING PRECAUTIONS9-1
OPERATING PRECAUTIONS9-2
ELECTROSTATIC DISCHARGE CONTROL9-3
PRECAUTIONS FOR STRONG LIGHT EXPOSURE9-4
STORAGE9-5
HANDLING PRECAUTIONS FOR PROTECTION FILM9-6
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LM270WQ1
Liquid Crystal Display
Product Specification
Contents
ITEMNo
EDID DATA10
EDID DATA10-1
EDID READ/WRITE PROTOCOL10-2
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LM270WQ1
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision
No
DescriptionPageRevision Date
First Draft(Preliminary)-Dec. 9. 20080.0
Pin symbol name is changed11Jan. 15. 20090.1
Timing data of EDID is corrected34Jan. 22. 20090.2
Check sum value is changed from BO to F535
Update diagonal size (60.96 68.47)5Feb. 7. 20090.3
Update pixel pitch (0.270x0.270 0.2331x0.2331)5
Update pin configuration of 30pin CNT11
Change 30pin CNT (Hirose I-PEX)11
Update timing table13
Check sum value is changed from F5 to 3935
Update outline dimension5Feb. 25. 20090.4
Add LED Bar Electrical Characteristics9
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Update Backlight Interface11
Update Response time18
Add typo (= will be updated)25~26
Update LED Connector & Mating Connector11Feb. 27. 20090.5
Update Outline Dimension24
Update a mechanic drawing25~26
Update EDID data32~34
Change SUFFIX1Apr. 15. 20090.6
Update General Features5
Update Electrical Characteristics7
Update LED Bar Electrical Characteristics9
Update Timing Table12
Update Mechanical Characteristics25~26
Update Packing Form29
Update EDID data32~35
Update Power Consumption6May. 27. 20090.7
Ver. 1.0 SEP. 16. 2009
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LM270WQ1
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision
No
DescriptionPageRevision Date
Update LED Bar Electrical Characteristics10
Change 30pin CNT (I-PEX JAE)11
Update pin configuration of 30pin CNT
Update Timing Table13
Update Power Sequence16~17
Update Optical Characteristics20
Update Mechanical Characteristics26
Update a mechanic drawing27~28
Update EDID data34~37
Update Electrical Characteristics8Jul. 20. 20090.8
Update LED CNT pin configuration12
Update a mechanic drawing28
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Update EDID data34~37
Update LED Bar Electrical Characteristics10Aug. 14. 2009
Update Electrical Characteristics8~9Aug. 31. 20091.0
Update a mechanic drawing28Sep. 16. 2009
Ver. 1.0 SEP. 16. 2009
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LM270WQ1
Liquid Crystal Display
Product Specification
1. General Description
LM270WQHD is a Color Active Matrix Liquid Crystal Display with Light Emitting Diode ( White LED) backlight
system without LED driver. The matrix employs a-Si Thin Film Transistor as the active element.
It is a transmissive type display operating in the normally black mode. It has a 27inch diagonally measured
ac t iv e di s pl a y a r ea wi t h QHD re so lu t io n (2 56 0 hor iz o nt al b y 14 4 0 ve rti cal pixe l ar ray )
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes.
Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot,
thus, presenting a palette of more than 16,7M(True) colors.
It has been designed to apply the 8Bit 4Lane Display port interface.
It i s i n t en de d t o s up po rt di sp la ys wh er e h ig h b ri gh tn es s , s u p e r w id e v ie wi ng an gl e,
high color saturation, and high color are important.
Main Link
4 Lane
AUX CH
DP function
Logic Power
3.3V
LCD Power
12 V
HPD
CN1
(30pin)
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General Features
Flash
memory
SPI
Timing
Controller
Logic Power
3.3V / 1.2V
EEPR
OM
I2C
Power
Circuit
Block
27.0 inches(68.47cm) diagonalActive Screen Size
630.0(H) x 376.13(V) x 21.8(D) mm(Typ.)Outline Dimension
0.2331 mm x 0.2331 mmPixel Pitch
2560 horiz. By 1440 vert. Pixels RGB stripes arrangementPixel Format
8-bit, 16,777,216 colorsColor Depth
380 cd/m
Power
Enable
(Video On)
Vled
2
( 5 points Avg.)Luminance, White
Mini-LVDS (RGB)
Source Driver Circuit
S1 S2560
TFT - LCD Panel
(2560 × RGB × 1440 pixels)
B/L System (White LED)
View Angle Free (R/L 178(Typ.), U/D 178(Typ.))Viewing Angle(CR>10)
Power Consumption
Ver. 1.0 SEP. 16. 2009
Total 96.91 Watt (Max.)
(15.36 Watt @VLCD, Max 81.55 Watt_Duty 100% of DC 350 mA_w/o driver)
4600 g (typ.)Weight
Transmissive mode, normally blackDisplay Operating Mode
Glare (Low Reflection treatment of the front polarizer)Surface Treatment
HDCP key implemented in Tcon (DP628)HDCP
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LM270WQ1
Liquid Crystal Display
Product Specification
2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit.
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter Notes
Power Input Voltage
Power Input Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity
Note : 1. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be 39 °C Max, and no condensation of water.
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Wet Bulb
Temperature [C]
10
0
Symbol
50
40
30
20
Values
MaxMin
90%
60
60%
40%
Humidity [(%)RH]
10%
Units
Vdc14-0.3VLCD
Vdc4-0.5VDPLOGIC
°C500TOP
°C60-20TST
%RH9010HOP
%RH9010HST
at 25 ± 2°C
at 25 ± 2°C
1
Storage
Operation
10 20 30 40 50 60 70 800-20
Dry Bulb Temperature [C]
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LM270WQ1
Liquid Crystal Display
Product Specification
3. Electrical Specifications
3-1. Electrical Characteristics
It requires two power inputs. One is employed to power the LCD electronics and to drive the TFT array and
liquid crystal. The second input power for the DP Rx.
Table 2-1-1. ELECTRICAL CHARACTERISTICS (Normal Mode)
Values
SymbolParameter
MaxTypMin
NotesUnit
MODULE :
Vdc12.612.011.4VLCDPower Supply Input voltage
mVp-p400-VdRFPermissive Power Input Ripple
ILCDPower Supply Input Current
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PLCDPower Consumption
I_DPLOGICDP Logic Input Current
1025890-
14751280-
12.3010.68-
17.7015.36
Vdc3.473.33.13VCC_DPLOGICDP Logic Input Voltage
Watt1.0P_DPLOGICDP Logic Power Consumption
1mA
2mA
1Watt
2Watt
3A3.0--IRUSH_VLCDRush Current
1mA300
2mA300
3A1.0--IRUSH_DPLOGICDP Rush Current
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Liquid Crystal Display
Product Specification
Note :
1. The specified current and power consumption are under the V
whereas mosaic pattern(8 x 6) is displayed and fVis the frame frequency.
2. The current is specified at the maximum current pattern.
3. The duration of rush current is about 2ms and rising time of power Input is 1ms(min.).
White : 255Gray
Black : 0Gray
=12.0V, 25 ± 2°C,fV=60Hz condition
LCD
Maximum current pattern
LM270WQ1
Mosaic Pattern(8 x 6)
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White Pattern
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LM270WQ1
Liquid Crystal Display
Product Specification
Table 2-2. LED Bar ELECTRICAL CHARACTERISTICS
LED String Power
LED Bar Power
LED driver design guide
: The design of the LED driver must have specifications for the LED in LCD Assembly.
The performance of the LED in LCM, for example life time or brightness, is extremely influenced by
the characteristics of the LED driver.
So all the parameters of an LED driver should be carefully designed and output current should be
Constant current control.
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When you design or order the LED driver, please make sure unwanted lighting caused by
the mismatch of the LED and the LED driver (no lighting, flicker, etc) never occurs.
When you confirm it, the LCD module should be operated in the same condition as installed in
your instrument.
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ConditionSymbolParameter
Values
Max.Typ.Min.
150--TjLED Junction Temperature
Unit
℃
Notes
1,7LED :
2,7mA700350-IsLED String Current
3,7V4137.835VsLED String Voltage
3,7V233226.8-VBarLED Bar Voltage
4,6,7Watt14.3513.2312.25Ps
4,6,7Watt81.5579.38-PBar
5,7Hrs--(39,000)LED_LTLED Life Time
7
1. Specified values are for a single LED bar including Left & Right Bar.
2. The specified current is input LED chip 100% duty current.
3. The specified voltage is input LED string and Bar voltage at typical 350 mA 100% duty current.
4. The specified power consumption is input LED string & bar power consumption at typical 350 mA
100% duty current.
5. The life is determined as the time at which luminance of the LED is 50% compared to that of initial
value at the typical LED current on condition of continuous operating at 25 ± 2°C.
6. The LED bar power consumption shown above does not include loss of external driver.
The used LED bar current is the LED typical current.
String Power Consumption is calculated with PS = VS x Is
Bar Power Consumption is calculated with PL = VBarx Is
7. LED operating DC Forward Current and Junction Temperature must not exceed LED Max Ratings.
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LM270WQ1
Liquid Crystal Display
Product Specification
3-2. Interface Connections
3-2-1. LCD Module
- LCD Connector(CN1). : FI-X30SSL-HF (manufactured by JAE)
The pin configuration for the 30 pin connector is shown in the table below.
Table 3 MODULE CONNECTOR(CN_SIG) PIN CONFIGURATION
DescriptionSymbolPin No.
DDC_SCL1
GND3
AUX_CH N4
GND6
Lane0P7
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Lane0N8
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GND9
GND12
DDC for Clock
DDC for DataDDC_SDA2
High Speed Ground for Auxiliary
Channel
Component Signal for Auxiliary
Channel
True Signal for Auxiliary ChannelAUX_CH P5
High Speed Ground for Main
Link 0
True Signal for Main Link 0
Component Signal for Main Link 0
High Speed Ground for Main
Link 1
True Signal for Main Link 1Lane1P10
Component Signal for Main Link 1Lane1N11
High Speed Ground for Main
Link 2
Pin No.
16
17
18
19
20
21
22
23
24
25
26
27
Symbol
Lane3P
Lane3N
GND
VIDEO_
ON
HPD
GND
GND
GND
GND
VLCD
VLCD
True Signal for Main Link 3
Component Signal for Main Link 3
High Speed Ground
Audio output from DP RXSPDIF
Video status from DP RX
Hot Plug Detect Signal
GND for main power
GND for main power
GND for main power
GND for main power
12V for LCM main power
12V for LCM main power
Description
True Signal for Main Link 2Lane2P13
Component Signal for Main Link 2Lane2N14
GND15
Notes : 1. Connector
2.1 Connector(Receptacle) : FI-X30SSL-HF(JAE) or 20389-Y30E-01(I-PEX)
2.2 Mating Connector(Plug) : FI-X30HL(JAE) or 20385-Y30T-12F(I-PEX)
Ver. 1.0 SEP. 16. 2009
High Speed Ground for Main
Link 3
28
29
30
VLCD
VLCD
VCC_L_IN
12V for LCM main power
12V for LCM main power
3.3V for DP TCON power
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LM270WQ1
Liquid Crystal Display
Product Specification
3-2-2. Backlight Interface
- LED Connector : H401K-D12N-12B (Manufactured by E&T)
- Mating Connector : 4530K-F12N-01R (Manufactured by E&T)
Table 5. LED CONNECTOR PIN CONFIGULATION
Symbol
LED channel 1 AnodeL_LED1+1
LED channel 1 CathodeL_LED1-2
LED channel 2 AnodeL_LED2+3
LED channel 2 CathodeL_LED2-4
LED channel 3 AnodeL_LED3+5
LED channel 3 CathodeL_LED3-6
R_LED1+
R_LED1-
R_LED2+
R_LED2-
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R_LED3+
R_LED3-
LED channel 1 Anode7
LED channel 1 Cathode8
LED channel 2 Anode9
LED channel 2 Cathode10
LED channel 3 Anode11
LED channel 3 Cathode12
NoteDescriptionPin No.
Left bar
Right bar
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