LG 29LN300B, Service Manual

Page 1: ...p eic lgservice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL MFL67714491 1306 REV00 29LN300B 29LN300B PX LB32B LED TV ...

Page 2: ...s Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 13 BLOCK DIAGRAM 20 EXPLODED VIEW 21 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ... 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 ...

Page 4: ...n 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 b...

Page 5: ...e 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 replaced...

Page 6: ... 10 3 Power Voltage Standard input voltage 100 V 240 V 50 60 Hz Standard Voltage of each products is marked by mod els 4 Specification and performance of each parts are followed each drawing and specification by part number in accord ance 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 spe...

Page 7: ...lution Analog Max 1366 x 768 60 Hz Recommend 1366 x 768 60 Hz Digital Max 1366 x 768 60 Hz Recommend 1366 x 768 60 Hz 4 Operating Environment Temp 10 C 35 C Humidity 20 80 5 Storage Environment Temp 10 C 60 C non condensing Humidity 5 90 non condensing No Item Specification Remarks 1 Market Brazil 2 Broadcasting system ISDB T PAL M PAL N 3 Component Input 1EA Y Cb Cr Y Pb Pr 4 RGB Input RGB PC Ana...

Page 8: ... 50 00 74 25 HDTV 1080I 7 1920 1080 27 00 24 74 25 HDTV 1080P 8 1920 1080 33 75 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 5 2 HDMI DTV 5 3 Component No Specification Remark Resolution H freq kHz V freq Hz Pixel clock MHz 1 720 480 15 730 59 940 13 500 SDTV DVD 480I 525I 2 720 480 15 750 60 000 13 514 SDTV DVD 480I 525I 3...

Page 9: ...XX bin by clicking Read 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD epk file download 1 Make New folder named LG_DTV and put ISP file epk in the folder 2 Put the USB Stick to the USB socket 3 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn t work But your downloaded version is High U...

Page 10: ...ize Color Characteristics 3 2 Function Check 3 2 1 Check display and sound Check Input and Signal items cf work instructions 1 TV 2 AV CVBS 3 COMPONENT 480i 4 RGB PC 1366 x 768 60 Hz 5 HDMI PC 1366 x 768 60 Hz Display and Sound check is executed by Remote controller Caution Not to push the INSTOP KEY after completion if the function inspection NO Item CMD 1 CMD 2 Data 0 Enter download MODE Downloa...

Page 11: ...y D book 4 0 Manual Download Model Name and Serial Number If the TV set is downloaded By OTA or Service man Some times model name or serial number is initialized Not always There is impossible to download by bar code scan so It need Manual download 1 Press the Instart key of ADJ remote controller 2 Go to the menu Model Number D L like below photo 3 Input the Factory model name ex 24MN33D or Serial...

Page 12: ...ration refer to the below table 4 6 Model Name SW Version Adjust check Press the Instart key of ADJ remote controller 4 6 1 Model Name SW Version Check 1 Check Model Name 2 Check S W Version Refer to the IC Ver in the BOM 4 6 2 Adjust Check 1 Check Country Group 2 Check Area Option 3 Check Tool Option Refer to the BOM Comments 4 Check Adjust ADC Comp RGB is OK 5 Check EDID RGB HDMI is OK After che...

Page 13: ...e Level 5V Replace IC806 Recheck N Check IC802 Output Voltage Level 3 3V_ST Replace IC802 N Y Y Y Y Check IC801 Output Voltage Level 12V Replace IC801 N Y Check IC808 Output Voltage Level 2 5V Replace IC808 N Check X201 Clock 24MHz Replace X201 N Replace IC100 Flash Memory Y Check IC803 Output Voltage Level 1 15V Replace IC803 N Y Y Check IC807 Output Voltage Level 1 5V Replace IC807 N Check IC809...

Page 14: ... R100 Check IC101 Replace Main Scaler IC N N Check Panel clock P601 9 10 Check IC101 Repair Main B D N Check Panel power P601 27 28 29 30 12V IC801 Output 12V Replace IC801 N Y Replace T con Board or module Check FFC Cable for damage or open conductors Replace Cable N Y Y Y Check LED Driver output LED Driver B d P1100 1 Check LED Driver IC1100 Replace LED Driver IC N Y ...

Page 15: ... 3 3V 2 Check IC802 Output voltage 3 3V Replace IC802 Y N Check RF IC IC2600 I2C Signal SCL R2608 SDA R2609 Check IC101 N 1 Check RF IC L2604 Power 1 8V 2 Check IC805 Output voltage 1 8V Replace IC805 Y N N Y N Y 1 Check Demodulator L2619 Power 1 23V 2 Check IC809 Output voltage 1 23V Replace IC809 1 Check Demodulator L2621 Power 3 3V 2 Check IC802 Output voltage 3 3V Replace IC802 ...

Page 16: ... Wave form of C220 Wave form of C218 Wave form of C222 Wave form of Comp Y Wave form of Comp Pb Wave form of Comp Pr Check input signal format Is it supported Check signal R239 R237 R241 C220 C218 C222 Replace R239 R237 R241 C220 C218 C222 Y N Check JK2800 Replace JK2800 or Check Device Y N Y IC101 has problem Y Check Component Cable ...

Page 17: ...ve form of R4024 Hsync Wave form of R230 C206 Wave form of R228 C204 Wave form of R232 C208 Check input signal format Is it supported Check Hsync Vsync R266 R267 Replace R266 R267 Check signal RGB R228 R230 R232 C204 C206 C208 N Check JK400 Replace JK400 or Check Device Y N Y Replace R228 R230 R232 C204 C206 C208 N IC101 has problem Y Check RGB Cable Y Y ...

Page 18: ...and service purposes 6 No Video HDMI Check input signal format Is it supported Y Check JK501 for proper connection or damage Replace connector Y N Y Check HDMI Cable for damage or open connector Check I2C Signal JK501 15 16 Re download EDID data Y N Check HDCP Key IC101 Replace Scaler IC101 N ...

Page 19: ... t hear any audio and Device support the audio signal normally Check Speaker and its wire connection P700 and the resistance Check Signal from IC700 L700 L701 L706 L709 Y Replace IC700 N Check R879 Voltage Level 3 3V Y Replace IC807 3 3V N Y Check Signal from IC101 SDA SCL R703 R214 R707 R213 Y Replace IC101 N Replace connector or Speaker N ...

Page 20: ... 20 LGE Internal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 21: ...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 X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTAN...

Page 22: ...O5 43 I O6 44 I O7 45 NC_26 46 NC_27 47 NC_28 48 NC_29 17 AL 3 NC_3 6 NC_6 16 CL 15 NC_10 14 NC_9 13 VSS_1 12 VDD_1 11 NC_8 10 NC_7 9 E 8 R 7 RB 4 NC_4 5 NC_5 25 NC_16 24 NC_15 23 NC_14 2 NC_2 22 NC_13 21 NC_12 1 NC_1 20 NC_11 19 WP 18 W PWM1 R148 33 C114 0 1uF Q100 MMBT3904 NXP E B C PWM2 3 3V_Normal C103 0 1uF PWM2 PF_OE MULTI_ON IC103 1 M24256 BRMN6TP NVRAM_ST EAN61548301 3 E2 2 E1 4 VSS 1 E0 5...

Page 23: ...GND_28 V15 GND_29 W16 GND_30 V8 GND_31 T18 GND_32 G10 GND_33 G11 GND_34 G12 GND_35 G13 GND_36 G14 GND_37 G17 GND_38 G18 GND_39 G19 GND_40 G24 GND_41 H11 GND_42 H12 GND_43 H13 GND_44 H14 GND_45 H15 GND_46 H16 GND_47 H17 GND_48 H18 GND_49 H19 GND_50 J9 GND_51 J10 GND_52 J11 GND_53 J12 GND_54 J13 GND_55 J14 GND_56 J15 GND_57 J16 GND_58 J18 GND_59 J19 GND_60 J25 GND_61 K9 GND_62 K13 GND_63 K14 GND_64 ...

Page 24: ... 5 DDC_GND 6 RED_GND 7 GREEN_GND 8 BLUE_GND 9 NC 10 SYNC_GND 11 GND_2 12 DDC_DATA 13 H_SYNC 14 V_SYNC 15 DDC_CLOCK 16 SHILED VA401 20V VA400 20V D416 MMBD6100 A2 C A1 R408 10K JP401 R434 47K DSUB_B R418 47K RGB_DDC_SCL VA418 20V DSUB_VSYNC 2 E18 Q400 MMBT3904 NXP E B C VA406 5 5V 3 3V_ST VA415 20V JP408 DSUB_G 5V_Normal JP406 DSUB_R R400 75 R413 10K R435 10K JP405 R401 75 JP410 JP430 JP431 4 12 11...

Page 25: ...D 19 18 10 CK 4 D1 1 D2 17 9 D0 8 D0_GND 3 D2 16 7 D0 6 D1 15 CK _HDMI2 D0 _HDMI2 CK _HDMI2 D506 1 IP4283CZ10 TBA ESD_HDMI_NXP 3 GND_1 2 TMDS_CH1 4 TMDS_CH2 1 TMDS_CH1 5 TMDS_CH2 6 NC_1 7 NC_2 8 GND_2 9 NC_3 10 NC_4 VA513 20V OPT VA503 20V R521 2 7K VA502 20V VA510 20V OPT 3 3V_ST R528 1K Q505 MMBT3904 NXP E B C R529 10K HPD2 DDC_SCL_2 HDMI_CEC R520 100 D2 _HDMI2 D1 _HDMI2 R500 47K VA505 OPT 5V_No...

Page 26: ...MMBT3904 NXP E B C RXA0 KEY1 JP611 R600 10K RXA3 3 3V_ST JP612 12V_PANEL_POWER P601 10031HR 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 JP603 R630 200 R604 270 1 10W 1 R610 330 1 10W 1 R625 5 6K R624 5 6K C605 0 1uF 16V C601 1000pF 50V R677 10K OPT R678 10K OPT 6 12 12 07 17 Change D601 3 IR LED and Control NC4_S7LRM 4 7K 10W 4ea 5 6 10W 2ea Module 111116...

Page 27: ... FAULT 13 MONITOR_0 14 MONITOR_1 15 MONITOR_2 16 BST2B 17 PGND2B 18 OUT2B 19 PVDD2B 20 PVDD2A 21 OUT2A 22 PGND2A 23 BST2A 24 VDR2 25 AGND 26 VCC5 27 VDR1 28 BST1B 29 PGND1B 30 OUT1B 31 PVDD1B 32 PVDD1A 33 OUT1A 34 PGND1A 35 BST1A 36 RESET 37 AD 38 CLK_I 39 GND_IO 40 VDD_IO 41 EP GND R738 12K AUD_MASTER_CLK 3 3V_Normal C723 22000pF 50V L701 LPH6045T 100M Audio_Coil_ABCO 10uH L709 1 NRS6045T100MMGK ...

Page 28: ...0K OPT C810 0 1uF 50V C811 0 1uF 50V JP802 C821 10uF 10V OPT R810 10K L802 10uH R805 47K R817 33K 12V 3 3V_ST C814 0 1uF 16V R827 10K 1 C830 10uF 10V 3 3V_Normal IC805 AP1117E18G 13 2 OUT 3 IN 1 ADJ GND 1 8V_TUNER C831 1uF 10V R831 1 C801 10uF 25V OPT C802 10uF 25V OPT C823 0 1uF 16V C824 0 1uF 16V C845 0 1uF 16V C825 0 1uF 16V C838 0 1uF 16V C834 1uF 10V Q801 MMBT3904 NXP E B C D801 40V SMAB34 C8...

Page 29: ...0K 1 R1132 30K 1 IC1100 TPS40210DGQR 3 DIS EN 2 SS 4 COMP 1 RC 5 FB 6 GND 7 ISNS 8 GDRV 9 BP 10 VDD 11 EP C1128 0 1uF 25V WLED_ENABLE R1100 4 7K R1106 220K 1 16W R1120 1M 1 8W 1 C1105 470pF 50V R1121 6 2K 1 R1103 18K 1 16W 1 R1111 0 1 1W R1127 10K R1122 100K 1 C1104 100pF 50V Q1101 AOD478 S D G C1119 100pF 50V C1101 10uF 25V R1107 30K 1 16W R1108 3 9K 1 16W 1 R1133 0 1 1W 1 R1129 1 5K 1 JP1100 3 3...

Page 30: ... VDD_4 K2 VDD_5 K8 VDD_6 N1 VDD_7 N9 VDD_8 R1 VDD_9 R9 VDDQ_1 A1 VDDQ_2 A8 VDDQ_3 C1 VDDQ_4 C9 VDDQ_5 D2 VDDQ_6 E9 VDDQ_7 F1 VDDQ_8 H2 VDDQ_9 H9 NC_1 J1 NC_2 J9 NC_3 L1 NC_4 L9 NC_6 T7 VSS_1 A9 VSS_2 B3 VSS_3 E1 VSS_4 G8 VSS_5 J2 VSS_6 J8 VSS_7 M1 VSS_8 M9 VSS_9 P1 VSS_10 P9 VSS_11 T1 VSS_12 T9 VSSQ_1 B1 VSSQ_2 B9 VSSQ_3 D1 VSSQ_4 D8 VSSQ_5 E2 VSSQ_6 E8 VSSQ_7 F9 VSSQ_8 G1 VSSQ_9 G9 B MDQU0 B MA14...

Page 31: ...16V C2647 0 1uF 16V C2663 0 1uF 16V FE_TS_SYNC R2624 10K FE_TS_DATA 0 C2656 0 1uF 16V OPT C2645 0 1uF 16V C2653 56pF 50V C2667 4 7uF 10V R2625 22K L2620 BLM18SG121TN1D FE_TS_CLK R2617 75 L2616 0603CS R27XGLW FE_TS_VAL_ERR R2616 75 L2617 0603CS R27XGLW R2618 75 1 16W 5 R2626 1K 1 16W 5 BR_RESET_DEMOD SCL SDA R2620 270 R2622 270 C2648 27pF 50V C2649 27pF 50V R2615 82 TU_SIF C2634 1000pF 50V C2650 0 ...

Page 32: ...R2831 10K COMP_Pb R2841 10K COMP_Pr D2817 5 6V OPT R2833 12K R2832 10K ZD2806 5 6B ZD2805 5 6B R2822 75 COMP_DET R2838 1K R2825 470K OPT JP2811 3 3V_Normal JP2810 R2826 470K OPT COMP_Y AV_CVBS_IN JK2800 PPJ234 05 5A GN O SPRING 6A GN E LUG 4A GN CONTACT 7B BL E LUG S 5B BL O SPRING 7C RD E LUG S 5C RD O SPRING_1 4C RD CONTACT_1 5D WH O SPRING 4E RD CONTACT_2 5E RD O SPRING_2 6E RD E LUG 20V D2816 ...

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