LG 55LM760T - Manuals - manualsarea.com

Page 2 - CONTENTS

- 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ................................................

Page 3 - General Guidance; Before returning the receiver to the customer,; Leakage Current Cold Check(Antenna Cold Check); Leakage Current Hot Check circuit; IMPORTANT SAFETY NOTICE; SAFETY PRECAUTIONS

- 3 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 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 e...

Page 4 - SERVICING PRECAUTIONS

- 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this ...

Page 6 - SPECIFICATION; Requirement for Test

- 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LCD TV used LD22E ch...

Page 10 - ADJUSTMENT INSTRUCTION; Automatic Adjustment

- 10 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to all of the LED LCD TV with LD22E chassis. 2. Designation (1) Because this is not a hot chassis,...

Page 11 - SET

- 11 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L Connect: USB port Communication Prot connection ▪ Com 1,2,3,4 and 115200(Baudrate) Mode check: Online Only ▪ check th...

Page 13 - EDID(The Extended Display Identification

- 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4. Manual Adjustment * ADC adjustment is not needed because of OTP(Auto ADC adjustment) 4.1 EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download 4.1....

Page 15 - and color temperature)

- 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ▪ Adjustment condition and cautionary items 1) Lighting condition in surrounding area Surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding....

Page 18 - TK; ea; BLOCK DIAGRAM

- 18 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes L / R I n S P D IF OU T U S B A u d io A M P ( ST A ) I2 S Ou t M TK j pG j pG P_TS C V B S P_TS T/ C D em od IF (+ /- ) U S B1 R S- 2 3 2 C P C -R G B P C -A U D I...

Page 19 - EXPLODED VIEW

- 19 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes A22 A2 A21 A5 A10 AG1 900 300 200 400 540 521 530 800 810 710 700 910 560 410 570 120 510 501 500 310 * Set + Stand * Stand Base + Body LV1 LV2 AG2 AG3 122122 Dual Play 123 EXPLO...

Page 20 - N V R A M; H D C P E E P R O M

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 21 - PLACE AT JACK SIDE

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 22 - S M D G a s k i t

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 26 - F R O M L I P S & P O W E R B / D

T H E R M A L THERMAL THERMAL THERMAL T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W ...

Page 27 - F o r D e b u g; R e n e s a s M I C O M; M I C O M M O D E L O P T I O N; M I C O M M O D E L O P T I O N

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 32 - Z e n e r D i o d e i s; c l o s e t o w a f e r

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 33 - F r o m S o C

U S B D O W N S T R E A M U S B D O W N S T R E A M U S B D O W N S T R E A M THERMAL THERMAL THERMAL T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N ....

Page 36 - Ethernet Block

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 39 - E A R P H O N E A M P

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 40 - O p t i o n F O R M T K

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 42 - D V B - S 2 L N B P a r t A l l e g r o

T H E R M A L T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G ...

Page 44 - L V D S

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 46 - < L E V E L S H I F T E R B L O C K >

T H E R M A L T H E R M A L T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E ...

Page 47 - D o n ’ t C o n n e c t P o w e r A t V D D I

T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...

Page 51 - CONTENT

◈ CONTENT ◈ New features Main PCBs Block Diagrams, IIC Map Structure of TV set and connection of sub ass’ys New sub ass’ys - Instruction of new sub ass’ys - How to use tool - Download Adjust way of new features (widevine…) Repair guide The latest issue and concerning issue Copyright © 2012 LG Electr...

Page 52 - EPI Interface; Features

EPI Interface EPI(Embedded Point-Point Interface) Features • Point-Point topology (support 2 Pair option) • CDR (Clock Data Recovery) • Bandwidth up to 1.85Gbps/pair at FHD 120Hz 10 bit application • Lock signal cascading and feedback to T-Con • Embedded Control Data Merits • Better reliability on c...

Page 53 - Difficult to upgrade bandwidth limit; EPI

EPI Interface (mini-LVDS vs. EPI) Comparison HF mini-LVDS What to change EPI (Embedded clock P-to-P Interface) - Difficult to upgrade bandwidth limit - Multiple number of wires needed for higher bandwidth HF mini- LVDS FHD (10bit) 60Hz 120Hz 240Hz No. of Signal 36 36 72 Connector 60pin (2ea) 60pin (...

Page 55 - Main PCB for Broadband; Micom for Key/IR sensing; model; Level shifter

Main PCB for Broadband Main + TCON all in one To PSU 1 2 6 4 1 Main processor, DDR MemoryeMMC Memory 2 3 4 Micom for Key/IR sensing PMIC Audio AMP (10W+10W) xxLM760S-ZB Soft touch +IR Front Spk To module 5 5 EPI Wafer G/S model 2 1 LNB IC Only G/S model 1 2 Chassis : LD22EPCB P/No : EAX64307905 3 6 ...

Page 56 - MTK; CI slot; Side; HDMI; LVDS

MTK5369 Block Diagram( LM76 ) L/R In SPDIF OUT USB Audio AMP (NTP7500 or STA) I2S Out MTK CI slot CI slot P_TS CVBS P_TS T/C Demod IF(+/-) USB1 RS-232C PC-RGB PC-AUDIO OPTIC LAN SYSTEM DDR3 X 1600 X 16 (2Gb) HDMI1 HDMI2 HDMI3 Side Rear RGB,H/V Ethernet CVBS UART SYSTEM EEPROM X 1 (256Kb) HDMI MUX (H...

Page 57 - Jack Interface; Main SoC

Jack Interface [PR0P],[PB0P],[Y0P] [OPCTRL8] [VDACX_OUT][VDACY_OUT] [AUOUTL0] [ADIN0_SRV] [CVBS2P] [AIN0_L_ADDC][AIN0_R_AADC] [SPDIF_OUT] [AUOUTR0] Main SoC MTK [SOY0] [Y1P],[PB1P],[PR1P] [OPCTRL9] [AL0_ADAC] [AR0_ADAC [VGA_SCL] [VGA_SDA] [OPCTRL7] [VSYNC], [HSYNC] [RP],[GP],[BP] [ASPDIF0] SPDIF SPD...

Page 58 - Main

GP4 Backend block diagram (EPI & T-con) IC7700 TPS65178 IC7701 TPS65198 50Pin EPI LEFT 50Pin EPI RIGHT VCOM, GIP_RST R(0 옴 ) OPT DISCHG VGL_I VGL_I VGH_ODD, VGH_EVEN VGH_R, VGH_F, VST R (0 옴 ) CLK1~6_I CLK1~6 V C OM_P/N/LOOP VGL_FB CTRLN VCC CTRLP VGH_FB VDD SWP SWN Main SoC MTK R (47 옴 ) EO_SOC...

Page 59 - EPI LEFT

GP4 Backend block diagram (EPI & T-Con) Main SoC MTK IC7700 TPS65178 50Pin EPI LEFT 50Pin EPI RIGHT GM A[1][3][9][10][12 ][14][15][16][18] GMA[4][5][7][12][15] E P I_LOC K 3 TXA1N/P, TXACLKN/P, TXA4N/P EPI CH1/2/3 EPI CH4/5/6 TXA0N/P, TXB1N/P, TXB2N/P Z_OUT Vcore VDD H_VDD Vcore H_VDD VDD VCC18 ...

Page 60 - Output; Dual-link LVDS Output

GP4 Backend block diagram (LVDS Tx & Local Dimming) LVDS Tx Block Main SoC MTK LVDS_SEL BIT_SEL_LOW 51PinLVDS Output PANEL_VCC (+12V) 41PinLVDS Output 10-bit (R) Dual-link LVDS Output 24 10-bit (R) 24 Dual-link LVDS Output • LVDS_SEL : “H”=JEIDA, “L” or NC=VESA (LGD) • BIT_SEL : “H” or NC = 10-b...

Page 62 - 012Y IR + Soft touch PCB Pinmap; Circuit Block Diagram

2012Y IR + Soft touch PCB Pinmap Circuit Block Diagram Pin Configuration KEY1, KEY2 Voltage(Tolerance of voltage ± 0.2V) Ass’y Picture Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only

Page 63 - 012Y IR + Soft Touch LED Lighting Scenario; Spec; Power LED Scenario

2012Y IR + Soft Touch LED Lighting Scenario 구분 Spec 내용 비고 Power Indicator UI - 12Y GP4 High(L9), GP4 Mid(MTK), GP4 Low(S7LR2) Æ “ Power Light” UI Delete compared with 11Y(GP3 model) - 11Y Carry Over Model : 12Y same Power LED scenario process Æ “ Power Light “ UI Delete, The way of 11Y Soft Touch As...

Page 64 - Manual of Touch Sensitivity

Introductions of GP4 Sensor (Touch IC) Touch Key Threshold Level (Ta = 25ºC ) 1. Verify the number of THR at first. 2. Once you correctly touch Touch button for more than 1 sec, you can see a Touch data while you keep touching the button. 3. Keep in mind that you can only read the Touch data during ...

Page 65 - Touch EEPROM Register change with USB port; Hex; Addr

Introductions of GP4 Sensor (Touch IC) Touch EEPROM Register change with USB port 1. Write all of the address, value ( Hex ) as a below. capable of only Touch.txt file based on the left picture 2. Make the file [ Filename : ‘Touch.txt’ ] and move it to USB (The outermost area, Don’t move it to any f...

Page 66 - Introductions of 12Y RF ass’y + Magic Remote control

Page 67 - Pairing Information Transmission (Send to TV after Paired)

1. System Remote RF Receiver TV UART or USB RF Pairing Information Transmission (Send to TV after Paired) • Static Calibration Data (Bypass only) • Remote FW ver. (Save also in Receiver) • BD_ADDR (Save also in Receiver) • Pairing Information Transmission Sequence • When it is paired, the remote s...

Page 68 - M3 Remote

2. Remote Buttons (M3 vs. M4) BUTTON RF Unpaired IR_CODE RF Paired RF_CODE IR continuous repeat ETC. Phsical Buttons POWER 0x08 0x08 Y IR only BACK 0x28 0x8028 Y HOME 0x7C 0x807C Y ← 0x07 0x8007 Y → 0x06 0x8006 Y ↑ 0x40 0x8040 Y ↓ 0x41 0x8041 Y OK 0x75 0x8044 Y CH + 0x00 0x8000 Y CH - 0x01 0x8001 Y ...

Page 69 - AA x 2 Battery; Power Management; Connector; Antenna

MPU-3050 (Gyro)(Invensense) LIS331DLH(Accel.)(STMicro) BCM20733M (BROADCOM) Bluetooth 3.0 Key Button( 4 x 5 ) AA x 2 Battery DC-DC 2.8V LDO Power Management Bluetooth Remocon Bluetooth Receiver BCM20702M (BROADCOM)Bluetooth 4.0 Antenna Connector X-tal20 MHz Antenna X-tal24 MHz 3. M4 Block Diagram 2....

Page 70 - 주요; Item

주요 Item IC Manufacturer Function Remocon Voice Voice Codec WM8950 Wolfson 16KHz Sampling of Audio data MEMS Mic. SPU0414HR5H Knowles Sensing Voice Motion Sensor Gyro Sensor ITG3050 Invensense Sensing angular velocity of X, Y, Z-axis Accelerometer MMA8452 Stmicro Sensing device tilt (Pitch & Roll...

Page 71 - RF Pairing

5. RF Pairing / Un-pairing Method Method Description RF Pairing Method1 – If unpaired, just press "OK" button. – If paired, press "OK" button after unpairing. Method 2 (Repairing) – Press “BACK" button for 5 sec. • When do pairing, the remote should make pairing request IR si...

Page 72 - Introductions of 12Y WIFI built in ass’y

Page 73 - WIFI built in feature; PIN

WIFI Built in ass’y feature(LGIT) WIFI built in feature PIN USB interface 1 5V 2 DM 3 DP 4 GND - Pin map - Block diagram Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only

Page 75 - WIFI Built in ass’y Specification

Page 78 - HDCP; High-bandwidth Digital Content Protection; Netflix

HDCP 9 High-bandwidth Digital Content Protection 9 Protect high-value digital motion pictures, television programs and audio against unauthorized interception and copying between a digital set top box or digital video recorder and a digital TV or PC. 9 Specification developed by Intel Corporation ...

Page 80 - Current; 추가; Add Item

4. Changed BOM As-Was Current Æ 추가 Add Item 1.Marlin (Yes/No)2 .CNTV (Yes/No) 3.HDCP Tx (Yes/No)4.DTCP Rx (Yes/No)5.HDCP Rx (Yes/No) 주 3) CNTV [Yes] : China Smart TV Only Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only

Page 82 - Contents of LCD TV Standard Repair Process

Contents of LCD TV Standard Repair Process No. Error symptom (High category) Error symptom (Mid category) Page Remarks 1 A. Video error No video/Normal audio 1 2 No video/No audio 2 3 Video error, video lag/stop, fail tunning 3, 4 4 Color error 5 5 Vertical/Horizontal bar, residual image, light spot...

Page 83 - Continue to the next page

Contents of LCD TV Standard Repair Process Detail Technical Manual No. Error symptom Content Page Remarks 1 A. Video error_ No video/Normal audio Check LCD back light with naked eye A1 2 LED driver B+ 24V measuring method A2 3 Check White Balance value A3 4 Power Board voltage measuring method A4 6 ...

Page 84 - Standard Repair Process; LCD TV

Normal audio Y N Move to No video/No audio No videoNormal audio Check Back LightOn with naked eye On Y N Check Power Board12v,3.5v etc. Normal voltage Y N Replace T-con Board or moduleAnd Adjust VCOM Repair Power Board or parts Check Power Board 24v output Normalvoltage Y Replace Inverter or module ...

Page 85 - Established; Error

Normal voltage? Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) No Video/No audio Check and replace MAIN B/D Y Replace Power Board and repair parts N End Standard Repair Process A. Video error No video/ No audio ☞ A4 Established date Revised date 2/13 LCD TV Error symptom 2010. 12 .14 ...

Page 88 - Check and

Color error? Y N ※ Check and replace Link Cable(LVDS) and contact condition Y N Replace Main B/D Color error? Check error color input mode Check color by input-External Input-COMPONENT - RGB - HDMI/DVI Y External device /Cable normal External Input/ Component error Check external device andcable Y E...

Page 89 - External device screen error-Color error; For LGD panel; For other panel

Screen normal? N Y Check external device connection condition Y N Check and replace Link Cable Normal? Y N Screen normal? Replace Main B/D(adjust VCOM) Replace module Check color condition by input-External Input-Component - RGB - HDMI/DVI End Vertical/Horizontal bar, residual image, light spot Requ...

Page 91 - * Please refer to the all cases which

B. Power error Off when on, off while viewing, power auto on/off Error? N Y Check Power OffMode Fix A/C cord & Outlet and check each 3 phase out Check A/C cord Check for all 3- phase power out Check outlet Replace Main B/D CPU Abnormal (If Power Off mode is not displayed)Check Power B/D voltage ...

Page 94 - D. General Function Problem; Cable connection

D. General Function Problem Remote control & Local switch checking Y N 1. Remote control(R/C) operating error Check R/C itself Operation Normal operating? Normal operating? Y Close Replace R/C If R/C operate, Explain the customer cause is interference from light in room. Check R/C Operating When...

Page 97 - Adjust VCOM

Replace module Zoom part with exterior damage Module damage Cabinet damage Replace cabinet Replace remote controller Remote controller damage Stand dent Replace stand F. Exterior defect Exterior defect Adjust VCOM Established date Revised date 13/13 LCD TV Error symptom Standard Repair Process ☞ A28...

Page 98 - Continued from previous page

Contents of LCD TV Standard Repair Process Detail Technical Manual No. Error symptom Content Page Remarks 21 B. Power error_No power Check front display LED A17 22 Check power input Voltage & ST-BY 5V A18 23 Checking method when power is ON A19 24 POWER BOARD voltage measuring method A4 25 26 B....

Page 99 - Press the ADJ button on the remote controller for adjustment.; Entry method; Press the ADJ button on the remote controller for adjustment.

Entry method 1. Press the ADJ button on the remote controller for adjustment. 2. Enter into White Balance of item 6. 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re- enter the value after replacing the MAIN BOARD. Standard Repair Process Detail Technical Manual ...

Page 100 - Edge LED

Standard Repair Process Detail Technical Manual Power Board voltage measuring method A. Video error_No video/ Audio A5 Established date Revised date Error symptom Content LCD TV Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) SMAW200-H24S (YEONHO) 1 Power on 2 24V 3 24V 4 24V 5 GND 6 ...

Page 102 - Checking method for remote controller for adjustment

Standard Repair Process Detail Technical Manual LCD-TV Version checking method A. Video error_Video error, video lag/stop 1. Checking method for remote controller for adjustment Press the IN-START with the remote controller for adjustment Version <ALL MODELS> A7 Established date Revised date E...

Page 103 - residual image, light spot

Standard Repair Process Detail Technical Manual LCD TV connection diagram (1) A. Video error _Vertical/Horizontal bar, residual image, light spot As the part connecting to the external input, check the screen condition by signal A8 Established date Revised date Error symptom Content LCD TV <ALL M...

Page 105 - You can view 6 types of patterns using the ADJ Key

Standard Repair Process Detail Technical Manual Adjustment Test pattern - ADJ Key A. Video error_Color error You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/...

Page 109 - In this case please exchange the module.

Appendix : Exchange the Module (1) Panel Mura, Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura, Light leakage Press damage Un-repairable Cases In this case please exchange the module. Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purp...

Page 111 - Option

Standard Repair Process Detail Technical Manual Check front display LED B. Power error _No power A17 Established date Revised date Error symptom Content LCD TV ST-BY condition: RedPower ON condition: white Front LED control :Menu Æ Option Æ Power Indicator Æ Standby light ON 2010. 12 .14 Copyright ©...

Page 113 - Check “power on” pin is high

Standard Repair Process Detail Technical Manual Checking method when power is ON B. Power error _No power A19 Established date Revised date Error symptom Content LCD TV Check “power on” pin is high 2010. 12 .14 24 Pin (Power Board ↔ Main Board) SMAW200-H24S (YEONHO) 1 Power on 2 24V 3 24V 4 24V 5 GN...

Page 115 - Checking method; Press the MENU button on the remote controller

Checking method 1. Press the MENU button on the remote controller 2. Select the AUDIO function of the Menu 3. Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C. Audio error_No audio/Normal video <ALL MODELS> A24 Es...

Page 116 - Checking order when there is no audio; Check the contact condition of or 24V connector of Main Board

Checking order when there is no audio ① Check the contact condition of or 24V connector of Main Board ② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and check the connector) ③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chi...

Page 117 - Checking order

Checking order 1, 2. Check IR cable condition between IR & Main board.3. Check the st-by 3.3V on the terminal 6.4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all. Standard Repair Pro...

Page 118 - Sequence of the Vcom adjustment

Standard Repair Process Detail Technical Manual Sequence of the Vcom adjustment D. VCOM Adjustment 1. Case ■ LCD module change ■ T-Con board change 2. Equipment ■ Service Remote controller 3. Adjust sequence ■ Press the ‘adj’ key ■ select V-COM ■ As pushing the right or the left button on the remote...