LG 22LE6500 Schematic

LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

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Internal Use Only

Printed in China

CHASSIS : LC01A

MODEL : 22LE6500 22LE6500-CA

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Only for training and service purposes

CONTENTS

CONTENTS .............................................................................................. 2

PRODUCT SAFETY ................................................................................. 3

SPECIFICATION ....................................................................................... 4

ADJUSTMENT INSTRUCTION ................................................................ 8

EXPLODED VIEW .................................................................................. 14

SVC. SHEET ...............................................................................................

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Only for training and service purposes

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 MΩ and 5.2 MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.

Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5 mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument's exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

When 25A is impressed between Earth and 2nd Ground for 1 second, Resistance must be less than 0.1

*Base on Adjustment standard

IMPORTANT SAFETY NOTICE

0.15 uF

Ω

1. Application range

This specification is applied to the LCD TV used LC03E chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

1) Temperature: 25 ºC ± 5 ºC(77 ºF ± 9 ºF), CST: 40 ºC ± 5 ºC

2) Relative Humidity : 65 % ± 10 %

3) Power Voltage: Standard input voltage (AC 100-240 V~ 50 / 60 Hz) * Standard Voltage of each products is marked by models.

4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with

BOM.

5) The receiver must be operated for about 5 minutes prior to the adjustment.

3. Test method

1) Performance: LGE TV test method followed

2) Demanded other specification

- Safety : CE, IEC specification

- EMC :CE, IEC

4. Module General Specification

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Only for training and service purposes

SPECIFICATION

NOTE : Specifications and others are subject to change without notice for improvement

No. Item Speciﬁcation Remark

1 Display Screen Device 22 inch wide color display module

2 Aspect Ratio 16:9

3 LCD Module 22 inch TFT LCD FHD

4 Operating Environment Temp. : 0 deg ~ 50 deg

Humidity : 20 % ~ 90 %

5 Storage Environment Temp. : -20 deg ~ 60 deg

Humidity : 10 ~ 90 %

6 Input Voltage AC 100-240V~, 50 / 60Hz

7 Power Consumption Power on (White)

LGD Typ : 40.8W LCD (Module) + Backlight(Lamp)

8 Module Size 495.6(H) x 292.2(V) x 14.5 mm(D)

8 Pixel Pitch 0.2475 (H) x 0.2475 (V)

9 Back Light LED(EDGEL)

10 Display Colors 1.06 B(true) colors

11 Coating 3H,AG

Only for training and service purposes

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No. Item Speciﬁcation Min. Typ. Max. Remark

1. Viewing Angle<CR>10> Right/Left/Up/Down 89 Degree

Luminance (cd/m

) 150

2. Luminance

- no i tair aV 1.3

3. Contrast Ratio CR 700 1000

White WX 0.279

WY Typ 0.292 Typ

RED Xr - 0.03 0.615 +0.03

4. CIE Color Coordinates Yr 0.343

Green Xg 0.319

Yg 0.631

Blue Xb 0.155

Yb 0.046

5. LCD Module

5.1. 22” LCD Module (LGD) LC216EXN-SCA1

1) Optical characteristics are determined after the unit has been ‘ON’ and stable in a dark environment at 25 °C ± 2 °C

2) Surface luminance is the luminance value at center 1-point across the LCD surface 50cm from the surface with all pixels displaying white.

No. Item Min Typ Max Remark

1. Cool White Balance,X axis 0.274 0.276 0.278 DQA : ±0.015 PSM: Vivid,

White Balance,Y axis 0.281 0.283 0.285 White (85IRE)

2. Medium White Balance,X axis 0.283 0.285 0.287 Color Temp : C50 -> Cool

White Balance,Y axis 0.291 0.293 0.295 0 -> Medium

3. Warm White Balance,X axis 0.311 0.313 0.315 W50 -> Warm

White Balance,Y axis 0.327 0.329 0.331

6. Chroma (Vivid)

- except “RGB PC Mode PSM: Standard, Color Temperature:Medium” ** The W/B Tolerance is ±0.002 for Adjustment, but for DQA ±0.015

MAX/MIN

Only for training and service purposes

7. Component Video Input (Y, CB/PB, CR/PR)

Specification

Remark

Resolution H-freq(kHz) V-freq(Hz)

1. 720x480 15.73 60.00 SDTV,DVD 480i

2. 720x480 15.63 59.94 SDTV,DVD 480i

3. 720x480 31.47 59.94 480p

4. 720x480 31.50 60.00 480p

5. 720x576 15.625 50.00 SDTV,DVD 625 Line

6. 720x576 31.25 50.00 HDTV 576p

7. 1280x720 37.50 50.00 HDTV 720p

8. 1280x720 44.96 59.94 HDTV 720p

9. 1280x720 45.00 60.00 HDTV 720p

10. 1920x1080 28.125 50.00 HDTV 1080i

11. 1920x1080 33.75 60.00 HDTV 1080i

12. 1920x1080 33.72 59.94 HDTV 1080i

13. 1920x1080 56.250 50 HDTV 1080p

14. 1920x1080 67.43/67.5 59.94/60 HDTV 1080p

Speciﬁcation

Proposed Remark

Resolution H-freq(kHz) V-freq(Hz) Pixel Clock(MHz)

1. 720*400 31.468 70.08 28.321 For only DOS mode

2. 640*480 31.469 59.94 25.17 VESA

Input 848*480

60Hz, 852*480 60Hz

-> 640*480 60Hz Display

3. 800*600 37.879 60.31 40.00 VESA

4. 1024*768 48.363 60.00 65.00 VESA(XGA)

5. 1280*768 47.78 59.87 79.5 WXGA

6. 1360*768 47.72 59.8 84.75 WXGA

8. 1280*1024 63.595 60.0 108.875 SXGA FHD model

10. 1920*1080 66.587 59.93 138.625 WUXGA FHD model

8. RGB (PC)

7. 1366*768 47.56 59.6 84.75 WXGA

9. 1280*720 45 60 74.25 720p DTV standard

FHD model

WXGA model

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Only for training and service purposes

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No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark

1. 720*400 31.468 70.08 28.321 HDCP

2. 640*480 31.469 59.94 25.17 VESA HDCP

3. 800*600 37.879 60.31 40.00 VESA HDCP

4. 1024*768 48.363 60.00 65.00 VESA(XGA) HDCP

5. 1280*768 47.78 59.87 79.5 WXGA HDCP

6. 1360*768 47.72 59.8 84.75 WXGA HDCP

7. 1280*1024 63.595 60.0 108.875 SXGA HDCP，FHD model

8. 1920*1080 67.5 60 148.5 WUXGA HDCP，FHD model

9.2. PC Mode

9. HDMI Input (PC/DTV)

9.1. DTV Mode

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark

1. 720*480 31.469 /31.5 59.94 / 60 27.00/27.03 SDTV 480P

2. 720*576 31.25 50 54 SDTV 576P

3. 1280*720 37.500 50 74.25 HDTV 720P

4. 1280*720 44.96 / 45 59.94 / 60 74.17/ 74.25 HDTV 720P

5. 1920*1080 33.72 / 33.75 59.94 / 60 74.17/ 74.25 HDTV 1080I

6. 1920*1080 28.125 50.00 74.25 HDTV 1080I

7. 1920*1080 26.97 / 27 23.97 / 24 74.17/ 74.25 HDTV 1080P

8. 1920*1080 33.716 / 33.75 29.976 / 30.00 74.25 HDTV 1080P

9. 1920*1080 56.250 50 148.5 HDTV 1080P

10. 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50 HDTV 1080P

Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LCD TV with

chassis.

2. Designation

1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing.

2) Power Adjustment: Free Voltage

3) Magnetic Field Condition: Nil.

4) Input signal Unit: Product Specification Standard

5) Reserve after operation: Above 5 Minutes (Heat Run)

Temperature : at 25 ºC ± 5 ºC Relative humidity : 65 % ± 10 % Input voltage : 220 V, 60 Hz

6) Adjustment equipments: Color Analyzer (CA-210 or CA-

110), Pattern Generator(MSPG-925L or Equivalent), DDC Adjustment Jig equipment, Service remote control.

7) Push the “IN STOP” key - For memory initialization.

3. Main PCB check process

* APC - After Manual-Insert, executing APC

* Boot file Download

(1) Execute ISP program “Mstar ISP Utility” and then click

“Config” tab.

(2) Set as below, and then click “Auto Detect” and check “OK”

message. If “Error” is displayed, Check connection between computer, jig, and set.

(3) Click “Read” tab, and then load download file (XXXX.bin)

by clicking “Read”.

(4) Click “Connect” tab. If “Can’t” is displayed, check

connection between computer, jig, and set. (5) Click “Auto” tab and set as below (6) Click “Run”. (7) After downloading, check “OK” message.

* USB DOWNLOAD(*.epk file download)

(1) Put the USB Stick to the USB socket. (2) Automatically detecting update file in USB Stick.

- If version of update file in USB Stick is Lower, it didn’t work. But version of update file is Higher, USB data is automatically detecting

filexxx.bin

(7) .........OK

(6)

(5)

(1)

Please Check the Speed : To use speed between from 200KHz to 400KHz

(2)

filexxx.bin

(3) (4)

Case1 : Software version up

1. After downloading S/W by USB, TV set will reboot automatically

2. Push “In-stop” key

3. Push “Power on” key

4. Function inspection

5. After function inspection, Push “I n-stop” key.

Case2 : Function check at the assembly line

1. When TV set is entering on the assembly line, Push “In-stop” key at first.

2. Push “Power on” key for turning it on.

-> If you push “Power on” key, TV set will recover channel information by itself.

3. After function inspection, Push “In-stop” key.

LC01A

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(3) Show the message “Copying files from memory”

(4) Updating is staring.

(5) After updating is complete, the TV will restart automatically.

(6) If TV turns on, check your updated version and Tool

option. (refer to the next page about tool option)

* If downloading version is higher than your TV have, TV

can lost all channel data. In this case, you have to channel recover. If all channel data is cleared, you didn’t have a DTV/ATV test on production line.

* After downloading, have to adjust Tool Option again.

(1) Enter ‘EZ ADJUST’ mode by pushing ‘ADJ’ key. (2) Select each ‘Tool Option(1~5)’ and push ‘OK’ or ‘G’ key. (3) Correct the number. (Each model has their number.)

(4) Correction Tool option is complete.

3.1. ADC Process

* You need not connecting RGB(D-sub) cable. Because ADC

uses TV internal pattern.

• Enter ‘EZ ADJUST’ mode by pushing ‘ADJ’ key,

• Enter ‘ADC Calibration’ mode by pushing ‘OK’ or “G ” key after selecting “6. ADC Calibration”.

<Caution> Turn on Tv by pushing ‘POWER ON’ or ‘P-ONLY’ key.

* ADC Calibration Protocol (RS232)

Adjust Sequence

• aa 00 00 [Enter Adjust Mode]

• xb 00 40 [Component1 Input (480i)]

• ad 00 10 [Adjust 480i Comp1]

• xb 00 60 [RGB Input (1024*768)]

• ad 00 10 [Adjust 1024*768 RGB]

• aa 00 90 End Adjust mode

* Required equipment : factory Service Remote control

3.2. Function Check

(1) Check display and sound

- Check Input and Signal items.

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Only for training and service purposes

Model Tool option1 Tool option2 Tool option3 Tool option4 Tool option 5

22LE6500 9056 18954 52260 14604 32

Item CMD1 CMD2 Data0

Adjust A A 0 0 When transfer the ‘Mode In’,

‘Mode In’ Carry the command.

ADC Adjust A D 1 0 Automatically adjustment

(The use of a internal pattern)

ADC Calibration

ADC Comp 480i

ADC Comp 1080p

ADC RGB

Start Reset

EZ ADJUST

0. Tool Option1

1. Tool Opti on2

2. Tool Option3

3. Tool Option4

4. Tool Option5

5. Country Group

6. ADC Calibration

7. White Balance

8. 10 Point WB

9. Test Pattern

10. EDID D/L

11. Sub B/C

12. V-Com

13. P-Gamma

1) TV

2) AV

3) COMPONENT (480i)

4) RGB (PC : 1024 x 768 @ 60hz)

5) HDMI 1/2/3

6) PC Audio In

* Display and Sound check is executed by remote control.

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Only for training and service purposes

4.3. White Balance Adjustment

4.3.1 Overview

(1) W/B adj. Objective & How-it-works (2) Objective: To reduce each Panel’s W/B deviation (3) How-it-works : When R/G/B gain in the OSD is at 192, it

means the panel is at its Full Dynamic Range. In order to prevent saturation of Full Dynamic range and data, one of R/G/B is fixed at 192, and the other two is lowered to find the desired value.

(4) Adj. condition : normal temperature

1) Surrounding Temperature : 25 ºC ± 5 ºC

2) Warm-up time: About 5 Min

3) Surrounding Humidity : 20 % ~ 80 %

4.3.2 Equipment

1) Color Analyzer: CA-210 (LED Module : CH 14)

2) Adj. Computer(During auto adj., RS-232C protocol is needed)

3) Adjust Remocon

4) Video Signal Generator MSPG-925F 720p/216-Gray (Model:217, Pattern:78)

-> Only when internal pattern is not available

A Color Analyzer Matrix should be calibrated using CS-1000

4.3.3. Equipment connection MAP

Color Analyzer

Comp uter

Pattern Generator

RS- 232C

RS-232C

Probe

Signal Source

* If TV internal pattern is used, not needed

4.3.4. Adj. Command (Protocol)

- LEN: Number of Data Byte to be sent

- CMD: Command

- VAL: FOS Data value

- CS: Checksum of sent data

- A: Acknowledge Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]

A RS-232C Command used during auto-adj.

Ex) wb 00 00 -> Begin white balance auto-adj.

wb 00 10 -> Gain adj. ja 00 ff -> Adj. data jb 00 c0 ... ... wb 00 1f -> Gain adj. completed

*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj.

wb 00 ff -> End white balance auto-adj.

A Adj. Map

LEN CMD VAL

RS-232C COMMAND Explanation

[CMD ID DATA]

wb 00 00 Begin White Balance adj.

wb 00 10 Gain adj.(internal white pattern)

wb 00 1f Gain adj. completed

wb 00 20 Offset adj.(internal white pattern)

wb 00 2f Offset adj. completed

wb 00 ff End White Balance adj.(Internal pattern disappears)

ITEM Command Data Range Default

(lower case ASCII) (Hex.) (Decimal)

Cmd 1 Cmd 2 Min Max

Cool R-Gain j g 00 C0

G-Gain j h 00 C0

B-Gain j i 00 C0

R-Cut

G-Cut

B-Cut

Medium R-Gain j a 00 C0

G-Gain j b 00 C0

B-Gain j c 00 C0

R-Cut

G-Cut

B-Cut

Warm R-Gain j d 00 C0

G-Gain j e 00 C0

B-Gain j f 00 C0

R-Cut

G-Cut

4.3.5. Adj. method

4.3.6. Reference (White Balance Adj. coordinate and temperature)

A Luminance : 216 Gray A Standard color coordinate and temperature using CS-1000

(over 66cm(26 inch))

A Standard color coordinate and temperature using CA-210

(CH 9)

A 10 Point White Balance

A Color Coordinate Variation by Aging time

Mode Color Coordination Temp ∆UV

COOL 0.269 0.273 13000 K 0.0000

MEDIUM 0.285 0.293 9300 K 0.0000

WARM 0.313 0.329 6500 K 0.0000

Mode Color Coordination Temp ∆UV

COOL 0.269 ± 0.002 0.273 ± 0.002 13000 K 0.0000

MEDIUM 0.285 ± 0.002 0.293 ± 0.002 9300 K 0.0000

WARM 0.313 ± 0.002 0.329 ± 0.002 6500 K 0.0000

LGD Edge LED Aging Time Cool Medium Warm

(Min.) (13,000 K) (93,000 K) (65,000 K)

1 0-2 276/285 292/305 315/334

2 3-5 274/282 290/302 313/332

3 6-9 273/280 289/300 312/330

4 10-15 272/278 288/298 311/328

5 20-35 271/276 287/296 310/326

6 36-49 269/274 286/294 309/324

7 50-79 269/273 286/293 308/323

8 Over 80 269/273 285/293 308/323

On / Off On / Off

Pattern Outer(default)

IRE 100

Luminance 130

Red(130.0 nit) 0

Green(130.0 nit) 0

Blue(130.0 nit) 0

(1) Auto adj. method

1) Set TV in adj. mode using POWER ON key.

2) Zero calibrate probe then place it on the center of the Display.

3) Connect Cable (RS-232C)

4) Select mode in adj. Program and begin adjustment.

5) When adj. is complete (OK Sing), check adj. status pre mode. (Warm, Medium, Cool)

6) Remove probe and RS-232C cable to complete adj.

A W/B Adj. must begin as start command “wb 00 00” , and

finish as end command “wb 00 ff”, and Adj. offset if need.

(2) Manual adj. method

1) Set TV in Adj. mode using POWER ON

2) Zero Calibrate the probe of Color Analyzer, then place it on the center of LCD module within 10cm of the surface.

3) Press ADJ key -> EZ adjust using adj. R/C -> 7. WhiteBalance then press the cursor to the right (KEY G).

(When KEY(G) is pressed 216 Gray internal pattern will be displayed)

4) One of R Gain / G Gain / B Gain should be fixed at 192, and the rest will be lowered to meet the desired value.

5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of color temperature.

A If internal pattern is not available, use RF input. In EZ

Adj. menu 7.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern.

A Adj. condition and cautionary items

1) Lighting condition in surrounding area

2) Probe location

3) Aging time

Surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding.

: Color Analyzer (CA-210) probe should be within 10 cm and perpendicular of the module surface (80° ~ 100°)

- After Aging Start, Keep the Power ON status during 5 Minutes.

- In case of LCD, Back-light on should be checked using no signal or Full-white pattern.

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LGE Internal Use Only

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