LG LM-201U02-A3C3 Service manual

( ) Preliminary Specification
( ● ) Final Specification

LM201U02

Liquid Crystal Display

Product Specification

SPECIFICATION

FOR

APPROVAL

20.1” UXGA TFT LCDTitle

BENQBUYER

MODEL

*When you obtain standard approval,

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DATESIGNATURE

/

/

/

please use the above model name without suffix

S.W.Lee / G.Manager

REVIEWED BY

H. S. Baek / G. Manager

PREPARED BY

K.G Park / Manager

LG.Philips LCD Co., Ltd.SUPPLIER

LM201U02*MODEL

A3C3Suffix

DATESIGNATURE

Please return 1 copy for your confirmation with
your signature and comments.

The preliminary document is subject to change without prior notice.

Ver. 0.3 July.30. 2002

MNT/TV Products Engineering Dept.

LG. Philips LCD Co., Ltd

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Product Specification

Contents

LM201U02

Liquid Crystal Display

PageITEMNo

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

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POWER SEQUENCE3-6

OPTICAL SFECIFICATIONS4

MECHANICAL CHARACTERISTICS5

RELIABLITY6

1

2

3

4

5

6

6

8

11

12

13

14

15

19

22

INTERNATIONAL STANDARDS7

SAFETY7-1

EMC7-2

PACKING8

DESIGNATION OF LOT MARK8-1

PACKING FORM8-2

Ver. 0.3 July.30. 2002

23

23

23

24

24

24

25PRECAUTIONS9

27APPENDIX

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Product Specification

RECORD OF REVISIONS

First Draft (Preliminary)-Nov.13.20010.0

LM201U02

Liquid Crystal Display

DESCRIPTIONPageRevision DateRevision No

4Feb.20.20020.1

4

19

19

15

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Outline Dimension: 24.5(D) mm -> 24.3(D) mm

Weight: 4,100 g (typ.) ->3,700 g (typ.)

Outline Dimension: 24.1(D) mm(Max) -> 24.3(D) mm(Typ)

Weight: 4,100 g (Typ) ->3,700 g (Typ)

4,300 g (Max) ->4,000 g (Max)

Front View Update20

Rear View Update21

Electrical Characteristics Notes Update6,7

Front View Update20

Rear View Update21

4. Optical spec.
Response time changed

typ 30ms-Æ 25ms

Front View Update(Lamp Wire:165mm->175mm)20Mar.08.20020.2

Rear View Update21

TMDS signal interface connector 8Mar.21.2002

FI-WE21P-HF-E (JAE) ->FI-WE21P-HF-E (JAE)

GT121-21P-LD ( LG CABLE)

Added the table 815

Luminance Uniformity(TCO’99) : 1.7(max)

Front View Update20Mar.27.2002

Rear View Update21

CNC1 Pin Configuration:Pin 8-> No Connection8Apr.02.2002

CNC1 Pin Configuration:Pin 18-> No Connection8

CNC2 Pin Configuration:Pin 12-> No Connection9

Table 5; the color of backlight connector pin(LV) changed10Apr.17.2002

CN1: Pin2 (Blue -> Sky Blue), Pin 5(white -> Dark blue)

CN2: Pin 2(white -> black)

CN3: Pin 2(white -> black)

CN4: Pin2 (Blue -> Sky blue), Pin 5(white -> Dark blue)

Ver. 0.3 July.30. 2002

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Product Specification

RECORD OF REVISIONS

LM201U02

Liquid Crystal Display

DESCRIPTIONPageRevision DateRevision No

16Jul.30.20020.3

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4. Optical spec.

Viewing Angle changed

min 80 degreeÆ typ 88 degree

Ver. 0.3 July.30. 2002

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LM201U02

Liquid Crystal Display

Product Specification

1. General Description

The LM201U02 LCD is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent
Lamp(CCFL) back light system. The matrix employs a-Si Thin Film Transistor as the active element. It is a
transmissive type display operating in the normally black mode. This TFT-LCD has a 20.1 inch diagonally
measured active display area with UXGA resolution(1200 vertical by 1600 horizontal pixel array). Each pixel is
divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the
luminance of the sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a
palette of more than 16,777,216 colors.
The LM201U02 has been designed to apply the TMDS
interface method to enables a simple and low-cost implementation in both the host and monitor.

VCC, VDD

TM

(Transition Minimized differential Signaling) as the

RGB (48BIT)

CLK

RGB (48BIT)

V0~V17

SOURCE (Right)SOURCE (Left)

(20PIN)

USER CON

INPUT 18V

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(15PIN)

POWER CON

General Features

RXC +/­RX0 +/­RX1 +/­RX2 +/-

GND

Timing

Controller

DC/DC

Converter

20.1 inches(51cm) diagonalActive Screen Size

467.8(H) x 361.0(V) x 24.3(D) mm(Typ.)Outline Dimension

0.255 mm x 0.255mmPixel Pitch

1600 horiz. By 1200 vert. Pixels RGB stripes arrangementPixel Format

8-bit, 16,777,216 colorsColor Depth

250 cd/m

Total 41.0 Watt(Typ.)Power Consumption

3,700 g (typ.)Weight

Transmissive mode, normally blackDisplay Operating Mode

2

GAMMA

(Typ.)Luminance, White

L

K

C

VCC,VGH,VGL

G
A
T
E

PANEL

1600 X 1200

Surface Treatment

Hard coating(3H)
Anti-glare treatment of the front polarizer,

TMDSInterface

6 CCFL’s(Cold Cathode Fluorescent Lamp)LAMP

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Liquid Crystal Display

Product Specification

2. Absolute Maximum Ratings

The following are maximum values which, if exceeded, may cause operation or damage to the unit.

Table 1. ABSOLUTE MAXIMUM RATINGS

LM201U02

Parameter Notes

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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Symbol

OP

ST

OP

ST

Values

MaxMin

500T

60-20H

Units

°C

°C

at 25 ± 5°CVdc21-0.3Vcc

1

1

1%RH9010H

1%RH9010H

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LM201U02

Liquid Crystal Display

Product Specification

3. Electrical Specifications

3-1. Electrical Characteristics

The LM201U02 requires two power inputs. One input is employed to power the LCD electronics and to
drive the voltages to drive the TFT array and liquid crystal. And the second input which powers the CCFL,
is typically generated by an inverter. The inverter is an external unit to the LCD.

Table 2. ELECTRICAL CHARACTERISTICS

Parameter Symbol

MODULE :

Inrush Current

LAMP :

Operating Voltage

Operating Current

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at 25 °C
at 0 °C

Operating Frequency

Power Consumption

Rush

BL

BL

BL

BL

Values

MaxTypMin

Vdc22.020.018.0VccPower Supply Input Voltage

920(3mA)750(7.5mA)740(8mA)V

1080--

1500--

V

V

RMS

mA9.07.53.0I

RMS

RMS

NotesUnit

1A0.70.4-IccPower Supply Input Current

1Watt12.66.3-PcPower Consumption

2Ohm11010090ZmDifferential Impedance

3A3--I

3V

4VsEstablished Starting Voltage

5kHz605040F

6Watt37.233.8-P

7min3--TsDischarge Stabilization Time

8Hrs30,000Life Time

Notes : 1. The input current shall be measured at V

clock frequency of 125MHz under 256gray(B/W) (typ)

2. This impedance value is needed to proper display and measured from TMDS Tx output and
input connector of module.

3. The measuring condition
The duration of rush current is about 20ms, and rising time of Power input is 1ms.

4. Operating voltage is measured at 25°C. The variance of the voltage is ±10%.

5. The output voltage at the transformer in the inverter must be high considering to the loss of the

ballast capacitor in the inverter. The voltage above V

than 1 second for start-up. Otherwise, the lamps may not be turned on.

6. Lamp frequency may produce interface with horizontal synchronous frequency and as a result this
may cause beat on the display. Therefore lamp frequency shall be as away possible from the
horizontal synchronous frequency and from its harmonics in order to prevent interference.

Ver. 0.3 July.30. 2002

AA

of 18.0Vdc at 25℃, refresh rate of 60Hz, and pixel

should be applied to the lamps for more

S

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LM201U02

Liquid Crystal Display

Product Specification

7. The lamp power consumption shown above does not include loss of external inverter at 25°C.

lamp current is the lamp typical current.

8. Let’s define the brightness of The used the lamp after being lighted for 5 minutes as 100%.
TS is the time required for the brightness of the center of the lamp to be not less than 95%.
The used lamp current is the lamp typical current.

9. The life time is defined as the time at which brightness of lamp is 50% compare to that of initial
value at the typical lamp current on condition of continuous operating at 25±2°C.

Note. Do not attach a conducting tape to connecting wire.

If the lamp wire attach to a conducting tape, TFT-LCD Module has a low luminance and the
inverter has abnormal action. Because leakage current is occurred between lamp wire and
conducting tape.
The design of the inverter must have specifications for the lamp in LCD Assembly.
The performance of the Lamp in LCM, for example life time or brightness, is extremely influenced by

the characteristics of the DC-AC inverter. So all the parameters of an inverter should be carefully

designed so as not to produce too much leakage current from high-voltage output of the inverter.

When you design or order the inverter, please make sure unwanted lighting caused by the mismatch

of the lamp and the inverter(no lighting, flicker, etc) never occurs. When you confirm it, the LCD –

Assembly should be operated in the same condition as installed in you instrument
Requirements for a system inverter design, which is intended to have a better display performance, a
better power efficiency and a more reliable lamp.
It shall help increase the lamp lifetime and reduce its leakage current.

a. The asymmetry rate of the inverter current and voltage waveform should be 10% below;
b. The distortion rate of the current and voltage waveform should be within √2 ±10%;
c. The ideal sine current and voltage waveform shall be symmetric in positive and negative polarities.

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* Asymmetry rate = | I

I

p

I

-p

Ver. 0.3 July.30. 2002

* Distortion rate = I

–I –p| / I

p

(or I –p) / I

p

rms

rms

* 100%

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LM201U02

Liquid Crystal Display

Product Specification

3-2. Interface Connections

This LCD employs three kinds of interface connections. A 21 pin connector is used for TMDS signals from
the host computer. A 15-pin connector is used for LCD module power and LCM controls signal from external
monitor control circuits. And four connectors, a three pin and two pin connector, are used for the integral
backlight system.

3-2-1. Signal Interface

The TMDS signal interface connector is FI-WE21P-HF-E by JAE and GT121-21P-LD by LG CABLE .
Interface chip in host side, must be used TMDS
equivalent.
The pin configuration for the 21 pin connector is shown in the table below.

Table 3 21PIN CONNECTOR (CNC1) PIN CONFIGURATION

TM

, part No. SiI160, designed by Silicon Image Inc., or its

Pin

10

1. Interface chips

2. Connector

Symbol Description Pin Symbol

1

TX1+

2

TX1-

3

SHLD1

4

SHLDC

5

TXC+

6

TXC-

7

GND

8

NC

9

NC
NC

1.1 LCD : Sil253(Silicon Image)

2.1 LCD : FI-WE21P-HF-E,GT121-21P-LD

2.2 Mating : FI-W21S or FI-W21M or compatible

2.3 Connector pin arrangement

TMDS positive differential output
(channel1)
TMDS negative differential output
(channel1)
Shield for TMDS channel 1
Shield for TMDS clock
TMDS positive differential output
(reference clock)

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TMDS negative differential output
(reference clock)
Logic Ground
No Connection
No Connection
No Connection

11

12

13
14
15

16

17
18
19
20
21

TX2+

TX2-

SHLD2
SHLD0
TX0+

TX0-

NC
NC
DDC_DAT
DDC_CLK
NC

Description

TMDS positive differential output
(channel2)
TMDS negative differential output
(channel2)
Shield for TMDS channel 2
Shield for TMDS channel 0
TMDS positive differential output
(channel 0)
TMDS negative differential output
(channel 0)
No Connection
No Connection
DDC2B Data (See note 2)
DDC2B Clock (See note 3)
No connection

121

CNC1

Notes: 1. All shield pins and GND(ground) pin should be connected together and should also be

connected to the LCD’s metal frame.

2, 3. These pins are only for external monitor control circuits and directly connected to CNC2 connector.

Ver. 0.3 July.30. 2002

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