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LG 22LK230 Service Manual
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LG 22LK230 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LP92R
MODEL : 22LK230
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL62298310 (1107-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
22LK230-TA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in China

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Summary of Contents for LG 22LK230

  • Page 1: Service Manual

    Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LP92R MODEL : 22LK230 22LK230-TA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL62298310 (1107-REV00) Printed in China...

  • Page 2: Product Safety

    PRODUCT SAFETY ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ............... 7 EXPLODED VIEW .................. 10 SCHEMATIC CIRCUIT DIAGRAM .............. Copyright © 2011 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2011 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    Copyright © 2011 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2011 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
  • Page 6 SDTV 576P 1280*720 44.96 59.94 74.176 HDTV 720P 1280*720 60.00 74.25 HDTV 720P 1280*720 37.5 50.00 74.25 HDTV 720P Copyright © 2011 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 (5) Factoring Option Data input 3) Click the “Config” button and Change speed. I2C Speed setting : 350 Khz ~ 400 Khz Copyright © 2011 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...

  • Page 8: Edid Data

    - Don’t connect HDMI cable when downloading the EDID. If the cables are connected, Downloading of EDID could be failed. Copyright © 2011 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 (4) Release the adjust mode of white balance - Release the white balance adjustment mode with aging command(F3, 00, FF) Copyright © 2011 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. INPUT [AV] Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 2011/5/6 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS/IR/KEY Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 2011/5/6 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI/RGB Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 2011/5/6 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 2011/5/6 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. AUDIO Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 MARIA8 128PIN THE CRITICAL COMPONENTS IN THE THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SYMBOL MARK OF THE SCHEMETIC. Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 2011/5/6 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2011 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 [ DESIGN CONCEPT ] BIG-BANG (MSTAR) BIG-BANG Revision (MSTAR) Module (HD) Speaker Module (HD) Speaker Audio Amplifier Audio Amplifier (Digital) (Digital) MSTAR MSTAR NPT3200L TAS5709PHPR (MARIA8) (MARIA8) Hotel speaker out Analog AUDIO out LGE7871 LGE7873 Analog Inputs Analog Inputs Digital Inputs Digital Inputs RF/AV HDMI...
  • Page 20 Spec. Comparison TV Minimalist & Value Maximizers Spec Maria8 (HD) Maria8-Revision (HD) MSTAR Maria8(LGE7871) MSTAR Maria8(LGE7873) Main Chip Module WXGA WXGA PSU (19”/22” Lips) PSU (22” Lips) PCB Size 206 x 90.5 (2 Layer) 130 x 103 (2 Layer) N (Support up to 720p for Component/HDMI ) N (Support up to 720p for Component/HDMI ) 1080p input support 1080p Panel support...
  • Page 21 UI Comparison Item Detailed Item BigBang BigBang-Revision Font Type GUI Font Type GUI Setup Program Edit Favorite Channel: supports 8 favorite Favorite Channel: supports 8 favorite channel channel Picture Picture Mode Vivid/Standard/Cinema Vivid/Standard/Cinema (In Vivid/Standard/Cinema, Each (In Vivid/Standard/Cinema, Each items items support User Mode) support User Mode) Advanced...

  • Page 22: Block Diagram

    [ BLOCK DIAGRAM ] Module POWER BOARD IR/KEY P204 P201 P703 10 11 LVDS Output 66 55 58 59 52 106 79~88 SIF SAW VIF_12V IC603 SPI_CLK K9362M Input SPI_DI Serial Flash SPI_CZ A_OUT_16.5V SPI_DO VIF SAW S_AMP_16.5V K7257M IC601 IC602 Input Main SDA...
  • Page 23 [ POWER FLOW DIAGRAM(1) ] P204 : HD L708 Q705 SMAW200-11 P_5V 5V_LCD 1, 2, 3, 4, 5 P703 AO4813(Switching) 4.98V / 5.13V / IC604 : MST7873KM IC604 : MST7873KM IC702 5V_M ----------------------------- 1.2V_VDDC_M8 44 , 77, 120 4 : AVDD_ADC 5.09V / 4, 11, 21, 22, 30, 46, 11 : AVDD_ADC...
  • Page 24 [ POWER FLOW DIAGRAM (2) ] 4 : VCC C550 16.5V_AOUT 6 : INPUT2- Audio Amp R539 Q503 R544 7 : OUT2 C556 IC502 C555 R537 MNT_R OUT 1 : OUT1 R541 R539 Q502 4 : INPUT1- R536 C553 C552 MNT_R OUT C511 C523...
  • Page 25 [ ISP METHOD ] ISP Program Download Method 1. Unzip H5 Mstar Program.zip file to HDD 2. PLUG DownLoad JIG to PC with USB Cable, then JIG RED LED on. USB Cable to PC Move Switch to the Left-end & Right RED LED On PLUG USB Cable RGB(D-Sub) Cable to VSC(H5 TV)
  • Page 26 3. After a few seconds later, new HardWare setup wizard window will pop up. – Ignore this window (No Need to push anything). You’ll see this window several times until finishing install DownLoad Program, but no need to push anything for this window. After finishing Installation, this window will be disappeared.
  • Page 27 5. Push Next(5-1), Select appropriate Directory Path and Push Next(5-2), and Push Next(5-3). (5-2) Click ! (5-3) Click ! (5-1) Click ! 6. While installation, Warning Windows pop up, then push continue. (6-2) Click ! (6-3) Click ! (6-4) Click ! (6-5) Click !
  • Page 28 7. After a minute, install will be finished. (7-1) Click ! (7-2) Click ! 8. Make a ISP_tool.exe short cut to desktop. (8-1) Right Click ! (8-2) Fix the cursor to send(N) ! (8-3) Click “Make a short cut to desktop” !
  • Page 29 S/W ISP Method 1. Connect the download jig to D-sub (RGB) jack 2. Execute ‘ISP Tool’ program, the main window (M star ISP utility Vx.x.x) will be opened 3. Click the “Connect” button and confirm “Dialog Box”...
  • Page 30 4. Click the “Config.” button and Change speed, I2C Speed setting : 350Khz~400Khz 5. Read and write bin file, Click “(1)Read” tab, and then load download file(XXXX.bin) by clicking “Read”.
  • Page 31 6. Click “(2)Auto” tab and set as below 7. Click “(3)Run”. 8. After downloading, you can see the “(4)Pass” message.

  • Page 32: Trouble Shooting Guide

    [ TROUBLE SHOOTING GUIDE ] No power [A] PROCESS (LED indicator off) Fail Check 5V Change Power B/D of Power B/D Pass Fail Check Voltage of P201#4 Change Main B/D St_5V Pass Fail Check LED Assy Change LED Assy Pass Check P201 Connector...
  • Page 33 [B]: Process No Raster Pass Check LED status Repeat A PROCESS On Display Unit Fail Pass Check Panel Link Cable Change Panel Link Cable Or Module Fail Or Module Pass Check Inverter Connector Change Inverter Connector Or Inverter Fail Or Inverter Pass Check Output of Q705 Change Q705...
  • Page 34 No Raster on HDMI Signal No Raster on COMPONENT Signal Pass Pass Check Input source Cable And Jack Check Input source Cable And Jack Pass Pass Check the Input/Output Re-soldering or Of JK301 Change the defect part Fail Re-soldering or Check The Input/Output Pass Pass...
  • Page 35 No Raster On AV Signal No Signal On TV(RF) Signal Pass Pass Check Input source Check Input source Cable And Jack Cable And Jack Pass Pass Re-soldering or Check The Input/Output Change the defect part Of TU401 Re-soldering or Fail Check The Input/Output Change the defect part Of JK101...
  • Page 36 No Sound Check The Input Sourse Change The Source Input Fail Pass Check The Input/Output Re-soldering or Of IC501 Fail Change the defect part Pass Change Speaker Check The Speaker Fail Pass Check The Speaker Wire...

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