Internal Use Only North/Latin America Europe/Africa Asia/Oceania http://aic.lgservice.com http://eic.lgservice.com http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LA31R / LD31S MODEL : 29LN45** 29LN45**-Z* CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS CONTENTS . ............................................................................................. 2 SAFETY PRECAUTIONS ......................................................................... 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ....................................................................................... 6 ADJUSTMENT INSTRUCTION ................................................................
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE 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.
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 publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1.
IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. Removal 1.
SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LED TV used LA31R / LD31S chassis. 3. Test method 2. Requirement for Test 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC Each part is tested as below without special appointment.
No.
5. Timing 5.1. RGB/HDMI (PC) No. Specification Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 1. 720*400 31.468 70.080 28.321 2. 640*480 31.469 59.940 25.175 3. 640*480 37.500 75.000 31.500 4. 800*600 37.879 60.317 40.000 5. 800*600 46.875 75.000 49.500 6. 1024*768 48.363 60.004 65.000 7. 1024*768 60.023 75.029 78.750 8. 1280*800 49.702 59.810 83.500 9. 1366*768 47.717 59.79 85.5 Remark 5.2. HDMI (DTV) No.
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. 720*576 15.625 50.000 13.500 SDTV, DVD 576I(625I) 50Hz 4. 720*480 31.470 59.940 27.000 SDTV 480P 5. 720*480 31.500 60.000 27.027 SDTV 480P 6. 720*576 31.250 50.000 27.000 SDTV 576P 50Hz 7. 1280*720 44.960 59.940 74.176 HDTV 720P 8. 1280*720 45.000 60.000 74.
ADJUSTMENT INSTRUCTION 1. Application Range (4) Click “Read” tab, and then load download file(XXXX.bin) by clicking “Read”. This document is applied to LA31R / LD31S chassis LED TV which is manufactured in TV(or Monitor) Factory or is produced on the basis of this data. (4) filexxx.bin 2. Designation (1) T he 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.
3.1. EDID Process 3.2. Function Check 3.1.1. EDID download 3.2.1. Check display and sound (1) Press "Power only" key of service remote control. (2) Press the ADJ KEY on R/C and enter EZ ADJUST (3) Enter EDID D/L mode by pushing "►" key at "11. EDID D/L". (4) EDID download is executed automatically. (5) Press EXIT key on service remote control. *Check Input and Signal items. (cf.
4. Total Assembly line process 4.1. Tool option & ADC Check (1) Press "Power on" key of service remote control. (2) Connect USB Port → USB to Serial Adapter (UC-232A) → RS-232C cable → PC(RS-232C port) (3) Check the 'Tool Option'(Refer to the BOM Comments or Adjustment spec) (4) Check the ‘ADC’ is ok. => Check the Download to CI+ Key value in LG set. (1) Check the method of CI+ Key value 1) Check the method on Instart menu 2) Check the method of RS232C Command a.
4.3. Function Check 4.4. White balance adjustment 4.3.1. Check display and sound - Equipment (1) Color Analyzer: CA-210 (LED Module : CH 14) (2) Adj. Computer(During auto adj., RS-232C protocol is needed) (3) Adjust Remote control ■ Check Input and Signal items. (cf.
4.5. DPM Operation check ■ Measurement Condition: 100~240V@ 50/60Hz (1) Set Input to RGB-PC and connect D-sub cable to set RGB Mode. Set Input to HDMI(with Input Label set to PC) and connect HDMI cable to set - HDMI Mode (2) Cut off H sync or V sync of signal. (3) Check DPM operation refer to the below table.
TROUBLE SHOOTING 1. No Power Check C820 All Voltage Level (19V) N Check Power connector OK ? N Replace Adapter Y Check IC809 Output Voltage Level (3.3V_ST) N Replace IC809 Y Check IC802 output Voltage Level (12V) N Replace IC802 & Recheck Y Check IC800 Output Voltage Level (5V) N Replace IC800 Y Check IC810 Output Voltage Level (2.5V) N Replace IC810 Y Check IC806 Output Voltage Level (1.15V) N Replace IC806 Y Check IC807 Output Voltage Level (1.
2. No Picture Module Back Light On ? N Check WLED_ENABLE high R131 N Check IC101 Replace Main Scaler IC N Check LED Driver IC1100 Replace LED Driver IC Y Y Check LED Driver output (LED Driver B’d P1100 #1) Check Panel power P601(#27,28,29,30) 12V IC804Output 12V N Replace IC804 Y Check Panel clock P601(#9,10) N Check IC101 Repair Main B/D Y Check FFC Cable for damage or open conductors. N Replace Cable Y Replace T-con Board or module 3.
(2) 29LN45*3/29LN45*B Check RF Cable Y 1. Check Tuner(TU3702 #5) Power (3.3V) 2. Check IC803 Output voltage(3.3V) N Replace IC803 Y 1. Check Tuner(TU3702 #7) Power (1.8V) 2. Check IC805 Output voltage(1.8V) N Replace IC805 Y Check Tuner(TU3702) I2C Signal SCL(R3735), SDA(R3736) N Check IC101 Y Check Tuner(TU3702) Data, CLK, SYN, VAL N Replace Tuner(TU3702) Recheck (3) 29LN45*5 Check RF Cable Y 1. Check Tuner(TU2601 #5) Power (3.3V) 2. Check IC803 Output voltage(3.3V) N Replace IC803 Y 1.
4. No Video - Component Check input signal format Is it supported? Y Wave f orm of Comp Y Wave f orm of Comp Pb Check Component Cable Wave f orm of Comp Pr Y Check JK2800 N Replace JK2800 or Check Device N Replace R239,R237,R241 C220,C218,C222 Y Check signal R239,R237,R241 C220,C218,C222 Y IC101 has problem Wave f orm of C218 Wave f orm of C220 Wave f orm of C222 5.
6. No Video - HDMI Check input signal format Is it supported? Y Check HDMI Cable for damage or open connector Y N Check JK501 for proper connection or damage Replace connector Y N Check I2C Signal (JK501) (#15, #16) Re download EDID data Y N Check HDCP Key (IC101) Replace Scaler(IC101) 7. No Audio Make sure you can’t hear any audio and Device support the audio signal normally.
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EXPLODED VIEW IMPORTANT SAFETY NOTICE 910 501 531 300 510 511 A2 301 A31 200 900 801 800 LV1 540 521 401 120 400 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 X-RADIATION, Shock, Fire, or other Hazards.
IC102 H27U1G8F2CTR-BC +3.3V_Normal WP NC_11 R106 1K NC_12 NC_13 R102 3.
MODEL_OPT_7 A8 OPT OPT OPT 0.1uF 0.1uF 0.1uF 0.1uF OPT 0.1uF 1 0.1uF 1 0.1uF 256M+128M OPT 0.1uF 0 OPT OPT C4024 B8 1 C4019 MODEL_OPT_6 256M MIU0-256M C4013 NON_DVB_S 1 C4006 MIU0-128M T24 0 0 C4011 U23 0 C299 MODEL_OPT_4 MODEL_OPT_5 128M 128M+128M C292 M120 +1.15V_VDDC VDDC : 2026mA C283 DVB_T2 NON_M120 VDDC 1.15V Note 1uF NON_DVB_T2 T25 +1.
TP for EU_T/C TP for SCART TP for CI slot /PCM_REG PCM_D[0] PCM_A[8] CI_TS_CLK SCART1_MUTE /PCM_OE PCM_D[1] /PCM_WE PCM_D[2] PCM_A[9] CI_TS_VAL SC1_ID PCM_A[10] CI_TS_SYNC SC1_FB /PCM_IORD PCM_D[3] PCM_A[11] CI_TS_DATA[0] SC1_SOG_IN /PCM_IOWR PCM_D[4] PCM_A[12] CI_TS_DATA[1] DTV/MNT_VOUT /PCM_CE PCM_D[5] PCM_A[13] CI_TS_DATA[2] SCART1_Lout /PCM_IRQA PCM_D[6] PCM_A[14] CI_TS_DATA[3] SCART1_Rout /PCM_CD PCM_D[7] CI_TS_DATA[4] SC1_CVBS_IN /PCM_WAIT CI_TS_DATA[5] SC1_R+
USB(SIDE) PC AUDIO(SIDE) 0 OPT R449 C +5V_Normal 0 +3.3V_ST D416 MMBD6100 A2 R451 DSUB RGB IC400 AP2191DSG +5V_USB A1 NC +3.3V_Normal OUT_2 OUT_1 12.08.10 47K->470K R448 10K R447 10K R468 470K C400 0.1uF R471 1K PC_AUDIO_DET C404 10uF 10V OPT FLG 8 1 7 2 6 3 5 4 GND IN_1 IN_2 C405 EN USB_CTL RGB_DDC_SCL DSUB_HSYNC OPT R455 0 12.07.02 BY.Hwang +3.
HDMI For CEC R520 100 HDMI_CEC CEC_REMOTE_S7 130221 Added +5V_Normal A2 A1 +3.3V_ST A2 A1 5V_HDMI_2 MMBD6100 D503 R521 R522 2.7K 2.7K C C MMBD6100 D502 DDC_SDA_2 DDC_SCL_2 MHL OCP AVDD5V_MHL LN4500 5V_HDMI_2 R531 0 R511 10 HDMI_2 With MHL IC500 BD82020FVJ LN4500 D500 MBR230LSFT1G OUT_3 8 1 +5V_USB R539 0 30V C500 10uF 10V LN4500 100K OPT R516 121109 Change 0ohm -> 10ohm (EOS Issue..Mstar Recommand) OUT_2 7 2 6 3 5 4 +3.3V_Normal IN_1 IN_2 C503 0.
IR/LED and Control Module +3.3V_ST P601 10031HR-30 P600 12507WR-12L KEY2 L600 BLM18PG121SN1D R616 3.3K KEY1 KEY_SCL R614 100 KEY_SDA R617 3.3K 1 JP600 1 2 3 JP601 2 4 +3.3V_ST +3.3V_ST R615 100 R604 1/10W 270 1% R610 1/10W JP602 330 1% JP605 Red LED:7.8mA Amber LED:9.
AUDIO AMP +3.3V_AMP L700-*1 10.0uH (OPT)Audio_Coil_TAIYO NRS6045T100MMGK AMP_RST AGND_PLL VDD_PLL 2 DGND_PLL 3 GND 4 DGND 5 C4072 1uF 10V 50V PVDD1B OUT1A PVDD1A 32 33 34 PGND1A RESET AD CLK_I BST1A 35 36 37 31 VCC5 JP704 25 AGND 24 VDR2 JP705 23 BST2A 21 OUT2A 19 20 PVDD2A 17 PGND2B 18 16 BST2B OUT2B 15 MONITOR_2 PVDD2B 14 5.
R803 36K 11.10.27 C818 0.1uF 50V +3.3V_ST C807 0.1uF 16V JP800 300K R815 1 FREQ C803 10uF 25V C820 111129 47uF 47uF DEL 25V 12.03.08 EAE42868301(3225)-> EAE61081701(3216) +12V_PANEL_POWER 6 GND EN 2 5 FB 4 11.11.07 6604->6601 C869 220pF 50V R816 68K R819 0 OPT C808 150pF 50V R838 15K 1% C840 10uF 10V C814 0.1uF 50V POWER_ON/OFF1 VOLTAGE HIGHER 11.11.05 +2.5V_Normal S C895 0.1uF 50V G PMV48XP Q805 R889 D 11.10.
R1227 +1.5V_DDR 0.1uF C1220 1uF 1uF C1241 1uF C1238 1uF C1219 1uF C1218 C1217 0.1uF 0.1uF C1239 10uF C1206 OPT C1251 1K 1% 1% 0.1uF C1250 1K 1000pF C1249 1% R1225 1K 0.1uF C1248 1000pF CLose to Saturn7M IC 121118 Change from bead to 0 ohm for Cost down R1228 R1224 1K 1% CLose to Saturn7M IC B-MVREFDQ B-MVREFCA C1247 A-MVREFCA 1000pF 0.1uF C1204 1% R1205 1K C1203 1000pF 0.1uF C1202 C1201 A-MVREFDQ CLose to DDR3 +1.5V_DDR +1.5V_DDR 1K 1% R1204 +1.
* Option name of this page : CI_SLOT (because of Hong Kong) CI Region CI SLOT +5V_CI_ON CI_DATA[0-7] CI TS INPUT /CI_CD1 R1908 100 4 CI_DATA[4] CI_DATA[5] 39 5 CI_DATA[6] CI_TS_DATA[6] CI_TS_DATA[7] 40 6 CI_DATA[7] 41 7 37 3 R1919 47 CI_DATA[0-7] 38 FE_TS_DATA[0-7] R1929 CI_MISTRT 9 CI_IORD 44 10 CI_ADDR[11] CI_IOWR 45 11 CI_ADDR[9] 46 12 CI_MDI[0] 47 13 CI_ADDR[13] CI_MDI[1] 48 14 CI_ADDR[14] CI_MDI[2] 49 15 CI_MDI[3] 50 16 51 17 OPT R1910 C1905 0.
FE_AGC_SPEED_CTL IF_AGC_SEL GLOBAL tuner block except T2/S2 FE_BOOSTER_CTL LNA2_CTL R3741-*3 2.2K (BR)TU_IIC_2.2K RF_SWITCH_CTL R3740-*3 2.2K (BR)TU_IIC_2.2K Pull-up can’t be applied because of MODEL_OPT_2 TU3704 TDSN-T701F (ASIA)ISOLATOR_DVB_1INPUT_H TU3703 TDSN-B601F(B) (BR)SI2178_BR_2INPUT_H (OPT)SI2178_TW_LNA_2INPUT_H R3705 0 121220 US(+3.3V_TU Pull-up) 1.2K->1.
SCART / COMPONENT&CVBS 121017 Change SCART AMP COMP_NON_ADC_FILTER L2807-*1 (OPT)COMP_ADC_FILTER_L 0 L2807 CM2012FR10KT COMPONENT&CVBS COMP_Y+/AV_CVBS_IN ZD2801 5.6B (OPT)COMP_ADC_FILTER C2829 47pF 50V R2822 75 ZD2800 5.6B (OPT)COMP_ADC_FILTER C2830 47pF 50V +3.3V_Normal R2837 10K +12V_Normal +5V_USB 130219 BJ.KIM OPT R2801 0 R2800 0 R2838 1K AV_CVBS_DET OPT D2817 5.6V 121017 Change COMP_Pb+ 6A (OPT)COMP_ADC_FILTER [GN]O-SPRING ZD2803 5.
TOTAL LED DRIVER BLOCK REDUCE INDUCTOR TEMP ISSUE +19V L1101 L2901 33uH L1102 D1103 D2901 BR210 VOUT#1=53.2V 33uH 33uH UF3D(SUZHOU GRANDE) 100V C2901 47uF 25V C2902 10uF 25V C2903 0.1uF 50V OPT C2911 33uF 100V C2905 100pF R2909 220K R2911 30K 50V 1/16W 1/16W IC2901 TPS40210DGQR C2912 C2913 1uF 1uF 100V 100V C2914 1uF 100V C2915 1uF 100V C2916 1uF 100V REDUCE RIPPLE CURRENT C2917 1uF 100V REDUCE RIPPLE CURRENT [EP] +19V R1127 100 D +3.3V_ST 6 1/16W 121211 R2914 1K->3.9K 3.