LG 22LK230 Service Manual Download Page 1

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LP92R

MODEL : 22LK230

22LK230-TA

North/Latin America

http://aic.lgservice.com

Europe/Africa

http://eic.lgservice.com

Asia/Oceania

http://biz.lgservice.com

Internal Use Only

Printed in China

P/NO : MFL62298310 (1107-REV00)

Summary of Contents for 22LK230

Page 1: ...READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP92R MODEL 22LK230 22LK230 TA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only Printed in China P NO MFL62298310 1107 REV00 ...

Page 2: ...Only Copyright 2011 LG Electronics Inc All right reserved Only for training and service purposes 2 CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 7 EXPLODED VIEW 10 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...heck 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...

Page 4: ... on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge...

Page 5: ...the solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replac...

Page 6: ...pecification Safety CE IEC specification EMC CE IEC 4 Model specification No Item Specification Measurement Remark 1 Market Non EU 2 Broadcasting system PAL SECAM B G D K PAL I II NTSC M 3 Available BAND PAL NTSC China DK Channel VHF UHF E2 C69 2 78 C1 C62 Cable S21 47 1 71 S1 S41 4 Receiving system Upper Heterodyne 5 Video Input PAL SECAM NTSC Rear 1EA 6 AV Audio Output RF AV HDMI Audio Output Re...

Page 7: ...ce of above 15 ºC G In case of keeping module is in the circumstance of 0 C it should be placed in the circumstance of above 15 C for 2 hours G In case of keeping module is in the circumstance of below 20 C it should be placed in the circumstance of above 15 C for 3 hours 3 Adjustment items 3 1 PCB assembly adjustment items 1 Download the MSTAR main software IC604 Mstar ISP Utility 1 Using D L Jig...

Page 8: ...ompleting the function inspection Don t connect HDMI cable when downloading the EDID If the cables are connected Downloading of EDID could be failed 4 3 EDID Data EDID D L method The EDID data is automatically saved 22LK230 4 5 Check SW Version 1 Method 1 Push In star key on Adjustment remote control 2 SW Version check Check Main Vx xx LK230 8 LGE Internal Use Only Copyright 2011 LG Electronics In...

Page 9: ...mode with aging command F3 00 00 4 Release the adjust mode of white balance Release the white balance adjustment mode with aging command F3 00 FF Luminance min value is 150cd in the Cool Medium Warm mode For LCD 5 2 2 Adjustment of White Balance for Manual adjustment 1 Color analyzer CA100 CA210 should be used in the calibrated ch by CS 1000 2 Operate the zero calibration of the CA100 or CA 210 th...

Page 10: ...anical 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 X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SA...

Page 11: ... 5600pF 50V C102 5600pF 50V R109 220K R108 220K JK101 PPJ234 03 5A RD1 O SPRING 6A RD1 E LUG 4A RD1 CONTACT 7B WH1 E LUG S 5B WH1 O SPRING 7C RD2 E LUG S 5C RD2 O SPRING 4C RD2 CONTACT 5D WH2 O SPRING 4E YL CONTACT 5E YL O SPRING 6E YL E LUG 16 5V_AOUT R114 47 FOR DEBUG Q101 ISA1530AC1 FOR DEBUG E B C R106 220 FOR DEBUG R111 470 FOR DEBUG R112 68 FOR DEBUG JP101 MNT_VOUT_T ZD101 SD05 ZD102 SD05 Q1...

Page 12: ...09 100pF 50V READY C208 100pF 50V C204 100pF 50V READY C203 0 1uF 50V C202 0 1uF 50V READY C201 0 1uF 50V C207 0 1uF 50V C212 100pF 50V READY KEY2 ST_3 3V R203 10K R206 4 7K P201 12507WR 08L 1 KEY1 2 KEY2 3 GND 4 ST_5V 5 GND 6 IR 7 LED_KEY 8 LED_POWER 9 R230 0 JEIDA P204 FF10001 30 1 30 2 29 3 28 4 27 5 26 6 25 7 24 8 23 9 22 10 21 11 20 12 19 13 18 14 17 15 16 16 15 17 14 18 13 19 12 20 11 21 10 ...

Page 13: ... 5 6 R305 5 6 R310 5 6 R307 5 6 R306 5 6 R312 5 6 JK301 YKF45 7058V 14 13 5 20 SHIELD 12 11 2 19 18 10 4 1 17 9 8 3 16 7 6 15 D304 30V D303 30V DSUB_SCL DSUB_SDA JK302 SPG09 DB 010 6630TGA004Q RED 1 GREEN 2 BLUE 3 GND_1 4 DDC_GND 5 RED_GND 6 GREEN_GND 7 BLUE_GND 8 NC 9 SYNC_GND 10 GND_2 11 DDC_DATA 12 H_SYNC 13 V_SYNC 14 DDC_CLOCK 15 SHILED 16 HD_5V 5V_M R329 4 7K C302 0 1uF 50V R331 4 7K D302 ENK...

Page 14: ... GND 1 INPUT 5 OUTPUT2 4 OUTPUT1 3 CHIP_CARRIER GND R417 10K TU_SW_VIF R429 0 TU_SW_VIF R424 10K TU_SW_VIF 5V_M 5V_M Q403 2SC3875S ALY TU_SW_VIF E B C TU_CTL_VIF D403 35V KDS114E KEC TU_SW_VIF R425 3 3K TU_SW_VIF R419 6 8K TU_SW_VIF 5V_M R420 6 8K TU_SW_VIF R430 0 NO_SW_VIF R403 0 No PRE AMP 5V_M R409 0 PRE AMP TU401 TDTK G701D ONLY_TA 5 B 5V 11 AIF 2 NC_2 10 NC_6 4 RF_AGC 1 NC_1 9 NC_5 8 NC_4 3 N...

Page 15: ...5 MCLK 16 OSC_RES 17 DVSS_1 18 VR_DIG 19 PDN 20 LRCLK 21 SCLK 22 SDIN 23 SDA 24 SCL 25 RESET 26 STEST 27 DVDD 28 DVSS_2 29 GND 30 AGND 31 VREG 32 GVDD_OUT_2 33 BST_D 34 PVDD_D_1 35 PVDD_D_2 36 OUT_D 37 PGND_CD_1 38 PGND_CD_2 39 OUT_C 40 PVDD_C_1 41 PVDD_C_2 42 BST_C 43 BST_B 44 PVDD_B_1 45 PVDD_B_2 46 OUT_B 47 PGND_AB_1 48 PGND_AB_2 C532 2200pF C536 0 033uF 50V C524 0 01uF I2S_WS 10uF C509 25V JP5...

Page 16: ...5 1uF 10V IC603 MX25L1606EM2I 12G 3 WP AGC 2 SO SIO1 4 GND 1 CS 5 SI SIO0 6 SCLK 7 HOLD 8 VCC R_TX2 R_TX2 DSUB_SCL R675 22 R674 4 7K ST_3 3V ST_3 3V MAIN_SDA MAIN_SCL C662 0 1uF 16V AUAMP_SCL AUAMP_SDA MUTE_LINE R685 100 ST_3 3V SW_RESET R670 100 A_DIM R669 100 P_DIM C631 0 1uF VDDC 100 R651 READY 100 R649 HDMI_5V_DET R606 6 8K TU_CTL_VIF DDC_CTL R614 4 7K R617 22 3 3V_M R655 100 R658 0 READY R618...

Page 17: ...K60706901 3 S1 2 G2 4 G1 1 S2 5 D1_1 6 D1_2 7 D2_1 8 D2_2 C775 0 01uF 50V C780 0 1uF 16V R785 75K 1 8W 1 C776 3300pF 50V C771 10uF 10V R782 7 5K 1 16W 5 IC702 SN1007054RTER 1 VIN_1 3 GND_1 7 COMP 9 SS 10 PH_1 11 PH_2 12 PH_3 13 BOOT 14 PWRGD 15 EN 16 VIN_3 5 AGND 8 RT CLK 6 VSENSE 4 GND_2 2 VIN_2 17 EP GND R784 22K 1 C779 100pF 50V C773 0 1uF 16V R783 24K 1 C772 0 1uF 16V C774 0 1uF 16V R781 330K ...

Page 18: ......

Page 19: ...mplifier Digital TAS5709PHPR MSTAR MARIA8 LGE7873 BIG BANG Revision MSTAR Analog AUDIO out DESIGN CONCEPT Module HD Speaker RF AV COMPONENT HDMI Digital Inputs Analog Inputs Audio Amplifier Digital NPT3200L MSTAR MARIA8 LGE7871 BIG BANG MSTAR Hotel speaker out Option ...

Page 20: ...yer 130 x 103 2 Layer PIP N N 1080p input support N Support up to 720p for Component HDMI N Support up to 720p for Component HDMI 1080p Panel support N N AV Output X Only Support AV Audio Output X Only Support AV Audio Output Hotel Speaker Out Optional X HDMI 1EA 1EA Component 1EA X AV 1EA 1EA S Video X X RGB_PC X X RS 232 X X USB Function X X USB D L SVC X X Tuner 1EA 1EA Spec Comparison ...

Page 21: ...d Standard Cinema Each items support User Mode Advanced Control Picture Mode value can be changed for all mode Picture Mode value can be changed for all mode Audio Sound Mode Standard Music Cinema In Standard Music Cinema Support Treble Bass setting for all input Standard Music Cinema In Standard Music Cinema Support Treble Bass setting for all input Clear Voice Not Support Not Support Input Input...

Page 22: ... OP AMP IC502 x4 Gain 36 35 P703 P204 Audio L Out 8 9 10 11 79 88 17 12 42 43 Audio R Out HDMI SCL SDA 114115 116 117 70 69 Audio_SCL Audio_SDA LVDS Output P Dim Inv ON OLP A Dim P_16 5V ST_3 3V S_AMP_16 5V A_OUT_16 5V VIF_12V P_16 5V Tuner_5V P_5V IC701 3 3V REG Q705 DUAL FET AO4813 Main_5V IC704 3 3V REG Main_3 3V IC702 DCDC Main_1 2V A_OUT_16 5V 23 24 15 20 21 22 I2S_MCLK I2S_WS I2S_SCK I2S_SDO...

Page 23: ...S5709 2 PVDD_A_1 3 PVDD_A_2 13 AVDD 27 DVDD 34 PVDD_D1 35 PVDD_D2 40 PVDD_C1 41 PVDD_C2 44 PVDD_B_1 45 PVDD_B_2 IC502 Audio Amp IC501 TAS5709PHPR 1 2 3 4 5 P204 HD 8 VCC IC602 HDCP EEPROM 8 VCC IC603 Serial Flash 8 VCC IC601 EEPROM TU401 TDTK G701D B IF Pre amp IC604 MST7873KM 44 77 120 4 ST_5V IC604 MST7873KM 4 AVDD_ADC 11 AVDD_ADC 16 AVDD_MPLL 21 AVDD_VIF 22 AVDD_VIF 30 AVDD_VIF 32 AVDD_AUSDM 44...

Page 24: ...1 35 PVDD_D_2 C511 C523 C516 C509 C525 C523 3 3V_M HDCP EEPROM A8 IC602 CAT24C08WI GT3 H RECV L602 L504 8 VCC M Star IC IC604 MST7873KM 8 VCC 7 HOLD Serial Flash 2M IC603 MX25L1606EM2I 12G 46 AVDDP1 56 63 89 101 109 118 4 AVDD_ADC 11 125 21 AVDD_VIF 22 30 32 AVDD_AUSDM ST_3 3V R691 Ready 27 DVDD 60 PWM1 61 PWM0 13 AVDD Sound Amp IC501 TAS5709PHPR EEPROM A0 IC601 AT24C64D SSHM T 8 VCC L501 3 3V 3 A...

Page 25: ... PC with USB Cable then JIG RED LED on 1 Unzip H5 Mstar Program zip file to HDD RGB D Sub Cable to VSC H5 TV USB Cable to PC Move Switch to the Left end Right RED LED On PLUG USB Cable ISP Program Download Method ISP METHOD ...

Page 26: ...o 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 4 Execute Setup exe in DB07 6 driver directory The location of directory can be different Double Click ...

Page 27: ...ext 5 1 Select appropriate Directory Path and Push Next 5 2 and Push Next 5 3 6 While installation Warning Windows pop up then push continue 5 1 Click 5 2 Click 5 3 Click 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: ...3 Click the Connect button and confirm Dialog Box 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 S W ISP Method ...

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: ... indicator off Check 5V of Power B D Change Power B D Pass Check Voltage of P201 4 St_5V Check P201 Connector Change LED Assy A PROCESS Fail Fail Pass Pass Check LED Assy Change Main B D Fail TROUBLE SHOOTING GUIDE ...

Page 33: ...PROCESS Pass Fail Check Output of Q705 Change Q705 Fail Change Inverter Connector Or Inverter Fail Pass Fail Pass Change Module Fail Check LVDS Cable Pass Check Panel Link Cable Or Module Change Panel Link Cable Or Module Check Inverter Connector Or Inverter Pass ...

Page 34: ...Output Of JK101 Fail Pass No Raster on HDMI Signal Check Input source Cable And Jack Pass Check the Input Output Of JK301 Fail Re soldering or Change the defect part Pass Pass Fail Pass Check EDID state in SVC Mode Fail Re Download software Pass Check the Input Output Of IC602 Fail Re soldering or Change the defect part Pass Pass Check the Input Output Of IC604 Fail Re soldering or Change the defe...

Page 35: ...defect part Pass Fail Pass Repeat A B Process Check the Input Output Of IC604 Fail Re soldering or Change the defect part Pass Check The Input Output Of TU401 Pass Re soldering or Change the defect part Fail Check the Input Output Of IC703 Fail Re soldering or Change the defect part Repeat A B Process Check the Input Output Of L402 L403 Fail Re soldering or Change the defect part Pass Pass ...

Page 36: ...und Check The Input Sourse Check The Input Output Of IC501 Re soldering or Change the defect part Fail Pass Pass Check The Speaker Change Speaker Fail Check The Speaker Wire Pass Change The Source Input Fail ...

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