User's Manual

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Printed in KoreaP/NO : MFL67733202 (1302-REV00)

CHASSIS : LD34D

MODEL: 42LA790V/W 42LA790V/W-ZA

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

LED TV

SERVICE MANUAL

North/Latin America http://aic.lgservice.com

Europe/Africa http://eic.lgservice.com

Asia/Oceania http://biz.lgservice.com

Internal Use Only

Summary of content (125 pages)

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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 : LD34D MODEL: 42LA790V/W 42LA790V/W-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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CONTENTS CONTENTS . ............................................................................................. 2 SAFETY PRECAUTIONS ......................................................................... 3 SERVICING PRECAUTIONS..................................................................... 4 SPECIFICATION........................................................................................ 6 ADJUSTMENT INSTRUCTION...............................................................
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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.
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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.
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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. 3. Solder the connections.
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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 LD34D chassis. 3. Test method 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC - Wireless : Wireless HD Specification (Option) 2. Requirement for Test Each part is tested as below without special appointment.
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No.
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5. External input format 5.1. 2D Mode (1) Component input(Y, CB/PB, CR/PR) No. Resolution H-freq(kHz) V-freq(Hz) 1. 720×480 15.73 60.00 SDTV, DVD 480i 2. 720×480 15.63 59.94 SDTV, DVD 480i 3. 720×480 31.47 59.94 480p 4. 720×480 31.50 60.00 480p 5. 720×576 15.625 50.00 SDTV 576i 6. 720×576 31.25 50.00 SDTV 576p 7. 1280×720 45.00 50.00 HDTV 720p 8. 1280×720 44.96 59.94 HDTV 720p 9. 1280×720 45.00 60.00 HDTV 720p 10. 1920×1080 31.25 50.00 HDTV 1080i 11.
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5.2. 3D Mode (1) RF Input(3D supported mode manually) No. Resolution Proposed 1 HD - DTV 1080I 720P SD - DTV 576P 576I 2 3 3D input proposed mode 2D to 3D Side by Side(Half) Top & Bottom SD - ATV(CVBS/SCART) (2) RF Input(3D supported mode automatically) No. Signal 1 Frame Compatible 3D input proposed mode Side by Side(Half), Top & Bottom (3) HDMI 1.3 (3D supported mode manually) No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 1 720*480 31.5 60 27.
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(4) HDMI 1.4b (3D supported mode automatically) No. Resolution 1 H-freq(kHz) V-freq.
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(5) HDMI-PC Input (3D) (3D supported mode manually) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode Proposed 1 1024*768 48.36 60 65 2D to 3D, Side by Side(half) Top & Bottom HDTV 768P 2 1360*768 47.71 60 85.5 2D to 3D, Side by Side(half) Top & Bottom HDTV 768P 148.
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(7) USB, DLNA – Movie (3D) (3D supported mode manually) No. Resolution 1 Under 704x480 2D to 3D 2 Over 704x480 interlaced 2D to 3D, Side by Side(Half), Top & Bottom 3 4 H-freq(kHz) Over 704x480 progressive V-freq.
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ADJUSTMENT INSTRUCTION 1. Application Range 3.1.3. Adjustment (1) Adjustment method - U sing RS-232, adjust items in the other shown in "3.1.3.3)" This specification sheet is applied to all of the LED TV with LD34D chassis. (2) Adj. protocol 2. Designation Protocol (1) Because this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isolation transformer will help protect test instrument. (2) Adjustment must be done in the correct order.
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3.3. LAN Inspection 3.4. LAN PORT INSPECTION(PING TEST) Connect SET → LAN port == PC → LAN Port 3.3.1. Equipment & Condition SET ▪ Each other connection to LAN Port of IP Hub and Jig PC 3.4.1. Equipment setting (1) Play the LAN Port Test PROGRAM. (2) Input IP set up for an inspection to Test Program. *IP Number : 12.12.2.2 3.4.2. LAN PORT inspection(PING TEST) (1) Play the LAN Port Test Program. (2) Connect each other LAN Port Jack. (3) Play Test (F9) button and confirm OK Message.
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* Manual Download (Model Name and Serial Number) If the TV set is downloaded by OTA or service man, sometimes model name or serial number is initialized.(Not always) It is impossible to download by bar code scan, so It need Manual download. 1) Press the "Instart" key of Adjustment remote control. 2) Go to the menu "7.Model Number D/L" like below photo. 3) Input the Factory model name(ex 47LM960V-ZB) or Serial number like photo. 3.6.2.
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4. Manual Adjustment * ADC adjustment is not needed because of OTP(Auto ADC adjustment) ⓓ Model Name(Hex): LGTV Cf) TV set’s model name in EDID data is below. MODEL NAME MODEL NAME(HEX) LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV) 4.1. EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download ⓔ Checksum(LG TV): Changeable by total EDID data. 4.1.1. Overview FHD EDID C/S data It is a VESA regulation.
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4.2.2.
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▪ Adj. Map Adj. item Cool Command (lower caseASCII) Data Range (Hex.) CMD1 MIN MAX R Gain j g CMD2 00 C0 G Gain j h 00 C0 B Gain j i 00 C0 R Gain j a 00 C0 G Gain j b 00 C0 B Gain j c 00 C0 * CASE Cool First adjust the coordinate far away from the target value(x, y). 1. x, y > target i) Decrease the R, G. 2. x, y < target i) First decrease the B gain, 3. x > target, y < target i) First decrease B, so make y a little more than the target.
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▪ Standard color coordinate and temperature using CA-210(CH 18) Coordinate Mode Temp ∆uv x y Cool 0.271±0.002 0.270±0.002 13000K 0.0000 Medium 0.285±0.002 0.293±0.002 9300K 0.0000 Warm 0.310±0.002 0.325±0.002 6500K 0.0000 4.3. Local Dimming Function Check Step 1) Turn on TV. Step 2) At the Local Dimming mode, module Edge Backlight moving right to left Back light of IOP module moving. Step 3) Confirm the Local Dimming mode. Step 4) Press "exit" key. 4.2.7.
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4.6. Wi-Fi Test 4.8. Inspection of light scattering Step 1) Turn on TV Step 2) Select Network Connection option in Network Menu. ▪ Test Method Step 3) Select Start Connection button in Network Connection. (1) Push “Power only” key. (2) Push “HDMI” hot key. (3) Inspect whether light scattering is occurred in internal black pattern or not. (4) Push “Power only” key. 4.9. Option selection per country Step 4) If the system finds any AP like blow PIC, it is working well. 4.9.1.
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4.11. Tool Option selection - Method: Press ADJ key on the Adj. R/C, then select Tool option. 5. Audio 4.12. Ship-out mode check(In-stop) ▪ After final inspection, press "IN-STOP" key of the Adjustment remote control and check that the unit goes to Stand-by mode. Item Min Typ Max Unit Remark 9.0 10.0 12.0 W Measurement condition 1. Audio practical max Output, L/R (Distortion=10% max Output) 8.5 8.9 9.8 Vrms 2. Speaker (8 Ω Impedance) 10.0 15.
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EXPLODED VIEW IMPORTANT SAFETY NOTICE 900 570 Dual Play (Option) 400 * Set + Stand 501 Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 510 200 121 300 530 Assembly 540 310 580 301 560 500 LV1 LV2 120 A22 A10 AG1 AG2 AT1 410 910 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.
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System Configuration Clock for LG1154D NVRAM EEPROM_ST IC102-*1 M24256-BRMN6TP +3.3V_NORMAL E0 MAIN Clock(24Mhz) E1 X-TAL_1 C101 E2 1 8 8 2 7 3 6 4 5 VCC WC SCL SDA - Low : Normal Operation - High : Write Protection VCC 1M A0 1 Write Protection VSS R108 1 GND_1 10pF C103 0.
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LG1154A LG1154D LG1154A IC100 LG1154D_H13D H13A_NON_BRAZIL +3.
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IC101 LG1154AN_H13A +3.3V_NORMAL OP MODE Setting & Select XTAL Input Clock for H13A CLK_54M_VTT INTR_GBB INTR_AFE3CH +3.
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IC100 LG1154D_H13D F15 M0_DDR_A[0] M0_DDR_A[1] M0_DDR_A[2] M0_DDR_A[3] M0_DDR_A[4] M0_DDR_A[5] M0_DDR_A[6] M0_DDR_A[7] M0_DDR_A[8] M0_DDR_A[9] M0_DDR_A[10] M0_DDR_A[11] M0_DDR_A[12] M0_DDR_A[13] M0_DDR_A[14] M0_DDR_A0 F13 M0_DDR_A1 F17 M0_DDR_A2 F19 M0_DDR_A3 E10 M0_DDR_A4 E18 M0_DDR_A5 E11 M0_DDR_A6 F18 DDR_SAMSUNG IC500 K4B4G1646B-HCK0 M0_DDR_A7 F11 M0_DDR_A8 F16 M0_DDR_A9 E9 VDDC15_M0 M0_DDR_CKE M0_DDR_A10 E12 N2 P8 M0_DDR_A12 E16 F14 R541 R520 M0_DDR_A13 M0_DDR_A14 F12
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+5V_CI_ON R711 10K OPT R712 10K OPT CI_DATA[0-7] CI JK700 10120698-015LF R716 /CI_CD1 CI_TS_DATA[3] R708 10K OPT R706 10K OPT 100 CI /PCM_WAIT R700 33 OPT 5 CI_DATA[6] CI_TS_DATA[6] CI_TS_DATA[7] 6 CI_DATA[7] CI R721 41 R707 10K OPT CI_ADDR[10] 8 43 9 44 10 CI_ADDR[11] 45 11 CI_ADDR[9] 46 12 CI_IN_TS_DATA[0] 47 13 CI_IN_TS_DATA[1] 48 14 CI_IN_TS_DATA[2] 49 15 CI_IN_TS_DATA[3] 50 16 51 17 52 18 0 OPT 0 OPT R722 C706 0 R718 0.
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PWR ON 1 3.5V 3 3.5V C2307 0.1uF 16V +12V UBW2012-121F L2303 C2306 0.1uF 50V 5 2 INV ON 4 PDIM#1 6 PDIM#2 8 GND GND 7 24V 9 10 24V GND 11 12 GND 12V 13 14 12V 12V 15 16 24V GND 17 18 GND 19 20 21 19 23 L/DIM0_MOSI S R2309 100 INV_CTL C2333 10uF 16V PWM_DIM PWM_DIM2 L2306 UBW2012-121F +24V C2316 0.1uF 50V +3.5V_ST R2338 10K OPT IC2307 NCP803SN293 VCC R2317 33K L2304 UBW2012-121F R2337 100K PD_+3.
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Renesas MICOM For Debug 32.768KHz 2 HDMI_WAUP:HDMI_INIT MICOM_DEBUG MICOM_DEBUG X3000 1 R3028 LOGO_LIGHT LOGO_LIGHT 8pF C3003 MICOM_RESET 8pF Don’t remove R3014, not making float P40 C3002 R3016 1K P3000 12507WS-04L R3014 10K MICOM_DEBUG MICOM_DEBUG +3.5V_ST +3.5V_ST 3 MHL_DET MICOM_RESET 4 4.7M OPT 5 R3030 P120/ANI19 MICOM_RESET_SW SW3000 JTP-1127WEM 270K OPT P124/XT2/EXCLKS 41 37 P123/XT1 42 P41/TI07/TO07 P137/INTP0 43 P40/TOOL0 P122/X2/EXCLK 44 C3001 +3.
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CK_GND D3215 RCLAMP0524PA 1 10 CK+ 2 CK- 12 6 7 D0+_HDMI1 6 HDMI_ESD_SEMTEK D1_GND 5 5 D1+ 4 3 4 D3211 RCLAMP0524PA 1 10 D2- HDMI_ESD_NXP D3211-*1 IP4283CZ10-TBA D1-_HDMI1 2 D2_GND 2 D2+ 1 9 3 8 4 7 TMDS_CH1- TMDS_CH1+ D1+_HDMI1 GND_1 TMDS_CH2- TMDS_CH2+ 1 10 2 9 3 8 4 7 5 6 3 5 6 2 NC_2 1 9 8 4 7 ARC TX2P TX2N TX1P TX1N TX0P TX0N TXCP TXCN TCVDD12 TPVDD12 R0XCN R0XCP R0X0N R0X0P R0X1N R0X1P R0X2N R0X2P VDD33_2 [EP]GND VDD12_3 67
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JK3401 JSTIB15 R3400 33 VIN A VCC B GND C SPDIF_OUT C3400 0.1uF 16V VA3400 5.5V 1/10W 5% HP_OUT R3409 100 4 OPT JK3403 PEJ038-3B6 +3.3V_NORMAL GND 5 L 4 DETECT 3 R 1 R3406 10K HP_OUT HP_DET 1/16W 5% SHIELD C3402 47pF 50V R3404 150 HP_LOUT Fiber Optic +3.3V_NORMAL SPDIF OUT R3405 150 HP_ROUT ADUC 5S 02 0R5L EAG61030009 HP_OUT 1/10W 5% COMPONENT 1 PHONE JACK VA3405 5.6V CVBS 1 PHONE JACK +3.3V_NORMAL +3.
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Place Near Micom +3.5V_ST LOGO_LIGHT R4003 33 10K R4000 OPT LOGO_LIGHT R4004 33 LOGO_LIGHT B LOGO_LIGHT_WAFER C LOGO_LIGHT LOGO_LIGHT R4001 10K LOGO_LIGHT C4000 0.1uF 16V 1K Q4000 R4002 MMBT3904(NXP) E LOGO_LIGHT +3.5V_ST R4008 10K 5% R4009 10K 5% R4006 100 KEY1 R4007 100 NON_EYE_Q_8P VA4001 5.6V AMOTECH CO., LTD. KEY2 C4001 0.1uF P4002 12507WR-08L C4002 0.1uF 1 VA4000 5.6V AMOTECH CO., LTD. 2 3 +3.5V_ST L4001 BLM18PG121SN1D 4 +3.
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+3.3V_NORMAL CAMERA C4202 4.7uF 17 RESET 6 16 DP4 7 15 DM4 14 13 DP3 AVDD_2 CAMERA R4214 1% 680 RREF C4205 1/16W 5% 5 DM2 DP2 100K CAMERA R4216 TEST/SCL 0.1uF CAMERA R4217 10K PGANG PSELF R4215100K CAMERA 22 23 10K R4218 OPT10K R4219 OVCUR2 24 SDA 25 V5 18 4 AVDD_1 CAMERA C4208 /RST_HUB C4209 0.1uF CAMERA AVDD_3 USB_CAMERA_DP IC4200 GL852G-31 0 R4210 CAMERA DP1 12 0.
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+5V_USB_1 USB1 (3.0) MAX 1.2A C4400 10uF 10V JK4400 SJ113262 +3.3V_NORMAL VBUS OCP USB1 R4500 10K OPT DUSB3_DM R4501 10K D+ USB3_DP IC4500 BD82020FVJ GND +5V_USB_1 1 2 3 4 +5V_NORMAL 7 3 6 4 5 USB3_RX0M STDA_SSRX+ OUT_2 USB3_RX0P OUT_1 C4501 GND_DRAIN 10uF 10V STDA_SSTX- OC USB3_TX0M STDA_SSTX+ USB_CTL1 OCP USB2/3 +5V_USB_2 3 6 4 5 10uF 10V FLT2 D4402 RCLAMP0502BA D4401 RCLAMP0502BA 9 3AU04S-305-ZC-(LG) JK4300 1 3 2 2 C4322 8 USB3 (2.0) MAX 1.
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+3.3V_NORMAL Full Scart(18 Pin Gender) EU R4801 10K CLOSE TO JUNCTION EU R4802 100 EU C4804 0.1uF VA4801 5.6V EU SC_DET 1/16W 5% SC_CVBS_IN VA4807 5.5V EU SHIELD 19 AV_DET 18 17 16 15 14 13 12 11 75 COM_GND R4800 EU VA4808 5.5V OPT SYNC_IN DTV/MNT_V_OUT SYNC_OUT SYNC_GND RGB_IO SC_FB R_OUT VA4802 5.6V EU R_GND G_OUT 10 G_GND 9 SC_R ID 8 VA4803 5.5V EU B_OUT 7 AUDIO_L_IN 6 B_GND 5 SC_G AUDIO_GND 4 VA4804 5.5V EU AUDIO_L_OUT 3 AUDIO_R_IN 2 AUDIO_R_OUT 1 SC_B VA4805 5.
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Ethernet Block LAN_JACK_POWER C5100 0.1uF 16V C5101 0.01uF 50V C5102 0.1uF 16V C5103 0.01uF 50V JK5100 XRJH-01A-4-DA7-180-LG(B) LAN_XML 1 2 3 4 5 6 P1[CT] P2[TD+] EPHY_TDP P3[TD-] EPHY_TDN P4[RD+] EPHY_RDP P5[RD-] EPHY_RDN P6[CT] VA5100 5.5V 7 8 9 10 11 D1 D2 D3 D4 VA5101 5.5V VA5102 5.5V VA5103 5.
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Ethernet Block R5215 3.3K +3.3V_WOL EPHY_ACTIVITY R5217 3.3K ET_RXER LAN_JACK_POWER +3.3V_WOL Place this cap. near IC +3.5V_WOL EPHY_CRS_DV C5203 0.1uF 16V ET_RXER 33 21 PHYRSTB RXDV 8 17 TXD[1] 1/16W 5% R5219 10K 1/16W 1% 3.3K EPHY_MDC 33 R5220 /RST_PHY (from SOC) EPHY_EN C5212 0.1uF OPT OPT 33 R5221 EDID_WP (PHY reset from MICOM) EPHY_TXD1 TXD[0] +3.3V_WOL 5pF C5202 R5209 C5211 0.1uF 16V G EPHY_INT R5208 3.
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R5602 0 Separate DGND AND AVSS C5613 2200pF 50V OUT_A NC_6 44 NC_5 43 BST_B 42 BST_C 41 NC_4 40 NC_3 19 LRCLK 20 SCLK 21 SDIN 22 39 OUT_C SDA 23 38 PGND_CD_2 SCL 24 37 PGND_CD_1 L5606 10.0uH NRS6045T100MMGK NRS6045T100MMGK 50V 0.033uF C5625 L5604 10.0uH SPK_R+ SPEAKER_R C5631 0.47uF 50V WOOFER_MUTE +3.3V_NORMAL C5606 L5602 0.1uF BLM18PG121SN1D 16V C5617 C5610 0.1uF 16V OUT_D PVDD_CD_2 BST_D PVDD_CD_1 GVDD_OUT VREG GND AGND DVSS C5614 0.1uF R5604 C5619 0.
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WOOFER R5700 0 P5701 GND-4 FW25001-02(SPK 2P) WOOFER Separate DGND AND AVSS 2 21 PVDD_AB_1 OUT_A 1 2 BST_A PVDD_AB_2 3 NC_1 5 4 WOOFER C5713 2200pF 50V SSTIMER NC_2 AVSS PLL_FLTM PBTL 8 9 6 R5708 470 PLL_FLTP WOOFER C5716 0.033uF 50V PGND_AB_1 46 OUT_B 45 NC_6 44 NC_5 43 BST_B 42 BST_C 41 NC_4 40 NC_3 WOOFER 39 23 38 PGND_CD_2 37 PGND_CD_1 36 35 34 33 32 25 31 24 OPT R5710 22 SDA WOOFER C5710 0.
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+12V EU AUD_OUT >> EU/CHINA_HOTEL_OPT IC6000 AZ4580MTR-E1 L6000 EU EU OUT1 R6000 C6000 1uF 25V EU OPT C6002 6800pF OPT R6002 33K EU R6004 IN1- 470K C6003 33pF EU IN1+ VEE SCART_AMP_L_FB 1 8 2 7 4 C6004 EU 0.1uF OUT2 R6011 2.
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HP_OUT_H13 HP_OUT_H13 C6109-*1 18pF C6104-*1 18pF EARPHONE AMP IC6100 TPA6138A2 HP_OUT C6100 R6100 1uF 10V HP_OUT 10K +INR HP_OUT_MTK C6104 180pF HP_OUT R6106 43K HP_OUT -INR HP_ROUT_MAIN 1% R6103 33K HP_OUT_MTK HP_OUT_H13 R6103-*1 43K C6108 10pF 50V OUTR 1 14 2 13 3 12 +INL HP_OUT_MTK HP_OUT R6104 -INL HP_OUT 43K C6109 180pF HP_OUT R6101 10K C6101 1uF 10V HP_OUT HP_LOUT_MAIN OUTL C6106 10pF 50V 1% R6102 33K HP_OUT_MTK HP_LOUT_AMP HP_ROUT_AMP GND_1 +3.
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CI POWER ENABLE CONTROL IC6200 AP2151WG-7 +5V_NORMAL IN 5 +5V_CI_ON 1 OUT CI 2 CI R6217 100 PCM_5V_CTL EN 4 3 GND FLG C6210 1uF 25V CI R6219 10K CI R6218 10K CI THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc.
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B-CAS (SMART CARD) INTERFACE +3.3V_NORMAL INT CMDVCC : STATUS --------------------------------HIGH HIGH CARD PRESENT LOW HIGH CARD not PRESENT +3.3V_NORMAL IC6300 TDA8024TT OPT OPT R6304 2.7K JAPAN R6306 5V/3V R6300 22 R6302 SMARTCARD_PWR_SEL/SD_EMMC_DATA[1] PGND +5V_NORMAL S2 JAPAN 28 2 27 3 26 4 25 5 24 6 23 AUX2UC AUX1UC JAPAN R6316 1.2K JAPAN 1 OPT R6319 1.2K CLKDIV2 JAPAN R6315 1.2K CLKDIV1 OPT R6318 1.
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/TU_RESET2 RF_SWITCH_CTL_50 FE_DEMOD1_TS_ERROR +3.3V_TU TU_Q/W_KR/BR/TW/CO/JP L6508 BLM18PG121SN1D TU_S/N/Q/W close to TUNER /TU_RESET1 C6520 0.1uF 16V TU_N/M/W_CN/TW/BR/CO R6508-*1 TU_N_TW/BR /TU_RESET1_TU 3 I2C_SCL6_TU TU_N/Q/W_KR/TW/BR/CO_H 4 I2C_SDA6_TU 5 +3.3V_TU 6 TUNER_SIF_TU 7 TU_+1.8V_TU 8 TU_CVBS_TU 10 C6508 47pF 50V mA(MAX) R6501 1K TU_M/W_BR/TW/CO/CN C6506 47pF 50V 12 +3.3V_TU 13 Power_D_Demod_TU CN_RESET_TU OPT R6516 470 R6510 33 I2C_SDA6 C6503 0.1uF 16V 0.
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4 5 6 7 8 9 10 11 A1 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 SCL SCL SDA SDA I2C_SCL6_TU +B1[3.3V] I2C_SDA6_TU SIF +3.3V_TU +B2[1.8V] CVBS +B1[3.3V] TU6701 TDSM-C651D(B) SIF +B2[1.8V] TUNER_SIF_TU TU_M_CN TU_+1.8V_TU 8 IF_AGC 9 DIF[P] 10 DIF[N] 11 A1 12 13 12 14 SHIELD 15 16 17 18 RF_S/W_CTL RF_SWITCH_CTL_50 RESET TU_PIN2 SCL I2C_SCL6_TU SDA I2C_SDA6_TU +B1[3.3V] +3.3V_TU SIF TUNER_SIF_TU +B2[1.8V] TU_+1.
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DVB-S2 LNB Part Allegro (Option:LNB) Input trace widths should be sized to conduct at least 3A 3A Ouput trace widths should be sized to conduct at least 2A +12V 2A D6904-*1 Max 1.3A 40V LNB_SX34 VIN 14 GND 13 VREG 12 ISET 11 TCAP LNB 5 A_GND Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes LNB A_GND LNB R6903 39K C6912 1/16W 1% LNB 0.
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LVDS [51Pin LVDS OUTPUT Connector] [41Pin LVDS OUTPUT Connector] P7202 FI-RE41S-HF-J-R1500 LVDS P7201 FI-RE51S-HF-J-R1500 LVDS 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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 NC OLED R7209 0 I2C_SCL1 OLED R7208 0 I2C_SDA1 UD_CPBOX R7200 0 I2C_SDA1 UD_CPBOX R7201 0 I2C_SCL1 NC NC NC NC LVDS_SEL R7204 0 OLED 1 2 FRC_RESET OLED : FRC_RESET = LVDS_VAL INV_CTL = ELVDD_ON 3 4 5 6 UD INV_CTL 7 R7217
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LOCAL DIMMING 1 [To LED DRIVER] P7400 12507WR-08L +3.3V_NORMAL L/DIM_OUT R7400 10K OPT 1 2 R7401 10K L/DIM_OUT 3 L/DIM0_SCLK 4 L/DIM0_MOSI L/DIM_OUT_I2C R7411 33 5 I2C_SCL2 8 9 THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
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VCC VCOM_P R7730 OPT 1/16W VCOM_N R7759 0 1/16W R7737 OPT 1/16W R7760 0 INSTEAD OF AMCC0208 1/16W Q7700 MMBT3904(NXP) 100K E R7728 C VCOM_LOOP VCOM1_FB VCC18 D7703 1N4148W 1/16W 5% VGL_FB B CTRLN L7700 VGL R7710 VCOM_DYN GMA4 GMA5 GMA7 VCOMFB POS NEG VCOM GMA6 GMA5 GMA4 GMA3 GMA2 GMA1 43 42 41 40 39 38 37 VGH TPS65178RSLR 31 CTRLP TCOMP 29 VL SWB1_2 COMP PVINB1_2 12 25 SS VGH I2C_SDA2 COMP R7727 100K C7755 1uF 50V D7706 1N4148W 100V
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VDD locate different direction for each C7923 10uF 25V C7926 10uF 25V C7930 10uF 25V VDD_EPI C7924 10uF 25V C7928 10uF 25V locate different direction for each THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2013 LG Electronics. Inc.
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eMMC I/F A5 B2 B3 3.
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EPI Interface EPI(Embedded Point-Point Interface) TCON 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 LOCK 2 VCC 1 Figure1. Topology Merits • • • • Better reliability on common noise No data skew and better EMI margin Fewer lines than mini-LVDS Slim PCB design Copyright © 2013 LG Electronics. Inc. All rights reserved.
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EPI Interface (mini-LVDS vs. EPI) Comparison What to change HF mini-LVDS LCM (T-con to S-Driver IC) FHD (10bit) HF miniLVDS 60Hz 120Hz 240Hz No. of Signal 36 36 72 Connector 60pin (2ea) 60pin (2ea) 80pin (2ea) HF mini-LVDS TCON 18 VCC -Difficult to upgrade bandwidth limit -Multiple number of wires needed for higher bandwidth 18 1 (FHD 120Hz) EPI (Embedded clock P-to-P Interface) FHD (10bit) EPI 60Hz 120Hz 240Hz 960ch 960ch 720ch No.
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EPI Interface (mini-LVDS vs. EPI) HF mini-LVDS EPI TCON TCON Lock Topology 1 2 Protocol Features @10bit, FHD120 Merit Demerit • Multi Drop • Data rate: 660Mbps • External clock • Point to Point • Data rate : 1.
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NFC (Near field communication) User Action Area Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication with each other by touching them together or bringing them into close proximity, usually no more than a few centimetres. Present and anticipated applications include contactless transactions, data exchange, and simplified setup of more complex communications such as Wi-Fi.
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LINE OUT Line out is used when you want to send the TV audio signal to an external device. It works like headphone. The signal out or line out remains at a constant level, regardless of the current setting of the volume control. What is the difference between headphones and line out headphone adjusts the volume on the television whereas, line out adjust the volume on the external devices such as amp or receiver. Line-out is a two-channel stereo output and you need a cable to connect an external speaker.
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Main PCB for Broadband Main + TCON all in one xxLA790V-Zx Chassis : LD34D PCB P/No : EAX65040103 3 To PSU 5 1 Main processor, DDR Memory eMMC Memory 2 Micom for Key/IR/Logo sensing 3 PMIC 4 Audio AMP 5 EPI Wafer 6 Level shifter 1 To module 6 2 WIFI/BT 4 Front Spk Key+IR+Logo Copyright © 2013 LG Electronics. Inc. All rights reserved.
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1. H13 Block Diagram (External) PC_Audio_L/R PC_AUDIO AV1_CVBS AV1_Audio L/R AV1 H13 LG1154AN Comp1 Y,Pb,Pr COMP1 M-Remote_Rx/Tx DAC_DATA HSR_P/M AAD_DATA CVBS BB_TP_DATA AUD Motion-R SPDIF H13 LG1154D SC_CVBS, RGB, Audio L/R SCART DTV/MNT_LR/V_OUT OPTIC H/P Audio L/R I2S H/P AMP Audio AMP H/P Line out SPK Tuner Woofer LNB HDMI1 SPDIF_OUT_ARC CI HDMI Switch HDMI2 HDMI3 MHL 1A CI HDMI4 PMIC HDMI_CEC FRC TCON EPI LEVEL SHIFTER Logo Light WOL / WOW RMII LAN PHY USB 2.
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2. LG1154 I2C Map +3.3V_NOR 23 [SDA] 24 [SCL] 23 [SDA] I2C_SCL1 33 Ω I2C_SDA1 33Ω AR15 [SCL0/GPIO66] AP15 [SDA0/GPIO65] I2C_SCL_MICOM_SOC [P60/SCLA0] 33 Ω 2 [P61/SDAA0] 33 Ω [SDA] 8 AP6 [SCL3] I2C_SCL4 22 Ω AR6 [SDA3] I2C_SDA4 22 Ω I2C_SDA_MICOM_SOC 33Ω AR16 [SCL1/GPIO64] AP16 [SDA1/GPIO79] 3.3k Ω I2C_SCL6 33 Ω AH33 [SDA5] I2C_SDA6 33 Ω 33 Ω Copyright © 2013 LG Electronics. Inc. All rights reserved.
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3. Power Block Diagram MICOM IR Ass’y Logo Light Ass’y Wi-Fi Ass’y Ethernet PHY 3.5V PANEL_VCC LNB SCART AMP 12V H13-D (VDD25) H13-D (AVDD25) H13-D (XTAL_VDDP) H13-D (HDMI_VQPS) H13-A (VDD25_CVBS) H13-A (VDD25_AUD) H13-A (VDD25_COMP) H13-A (VDD25_VSB) H13-A (VDD25_APLL) H13-A(AVDD33) H13-A (VDD_XTAL) H13-A (SDRAM_VDDQ) H13-A (AUAD_REF) H13-A (VDD25_REF) 1.5V DDR 3A H13-D (VDDC) DDR (VDD) DDR (VDDQ) 1.0V Core 3A H13-A (VDDC10) H13-A (AVDD10) H13-A (XTAL) 1.
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4. Tuner/CI Block Diagram TDSQG651D [+3.3V_S2_DEMOD] 32 +3.3V_D_Demod +3.3V_TU +1.8_TU +1.23V_D_Demod +3.3V_NORMAL [+3.3V_TUNER] 5 [+.1.8V_TUNER] 7 CI Slot 3.3K Ω [+1.
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5.
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6.
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7.
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8. Panel Interface Block Diagram VCC TX0P/N (EPI CH1 ±) 32/31 TX1P/N (EPI CH2 ±) 28/27 TX2P/N (EPI CH3 ±) 24/23 SWN VGL_FB CTRLN VCOMLFB/RFB CTRLP VDD VGH_FB SWP V core VDD VDD VGL_I VCOM_LOOP 50 DISCHG VGL VST GIP_RST VGL VGH GCLK LEVEL SHIFTER IC7701 TPS65198 38 37 36 35 H_VDD VCOM 34 VDD VGH_EVEN/ODD 39/40 VGH_F/R 41/42 CLK1/2/3/4/5/6 48~43 GMA_4/5/7/12/14/15 TX_LOCKN Copyright © 2013 LG Electronics. Inc. All rights reserved.
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9. PMIC & Level Shift Bloc Diagram PANEL_VCC Boost Converter Buck 1 converter(VCC) Buck 2 converter(Vcore) Buck 3 converter(HVdd) Buck 4 converter(VCC18) Vdd VCC Vcore HVdd SWN Positive Charge Pump Controller Negative Charge Pump Controller 6-Ch Gamma Buffer(DAC output) Level Shift VCC18 CTRLN SWP CTRLP TPS65198 TR/ Diode TR/ Diode VGL VGH GAM4/5/7/12/14/15 VCOM_P Vcom reference & gain Reset VCOM_N VCOM_LOOP PMIC_RESET PMIC TPS65178 Copyright © 2013 LG Electronics. Inc.
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10. USB / WIFI / M-REMOTE / UART [USB3_DM0] [USB3_DP0] USB1(3.
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Introductions of 13Y RF ass’y + Magic Remote control 1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List 5. Pairing/Un-pairing Method Copyright © 2013 LG Electronics. Inc. All rights reserved.
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1. System UART or USB RF RF Receiver TV Remote  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 sends packets(pairing success, F/W version, BD_ADDR) to the receiver. • The receiver sends the pairing success packet to TV directly. • F/W version and BD_ADDR packets are just saved on the receiver.
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2. Remote Buttons (M4 vs. MR13P) POWER BACK OK ← → Phsical Buttons Screen RMT Q.MENU VOL MUTE CH Logical Buttons M4 Remote MR13P Remote Copyright © 2013 LG Electronics. Inc. All rights reserved.
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3. MR13P Block Diagram MPU-6150 (Gyro+ACC) (Invensense) IR Emitter1 I2C ch1 512Kb (Serial F/M) IR Emitter2 (Voice Scene IR) BCM20733M A2 (BROADCOM) Bluetooth 3.0 Key Button (4x4) Antenna (BROADCOM) Bluetooth 4.0 Light Control 512Kbit (Serial Flash) Voice Antenna Partron BCM20702M SPI I2S X-tal 24 MHz WM8950 (Wolfson) I2C ch2 Codec(ADC ) Wheel Encoder MIC. (Knowles) X-tal 20 MHz UART 4-mode Only Power Management AA x 2 Battery DC-DC Boost TI TPS61097 SOT23-5 2.8V LDO 2.
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4. Function list 주요 Item IC Voice Codec Manufacturer Function WM8950 Wolfson 16KHz Sampling of Audio data SPU0414HR5H Knowles Sensing Voice Voice MEMS Mic.
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5. RF Pairing / Un-pairing Method Method RF Pairing RF Unpairing Description  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 signal(0x75) to TV. • When TV receive the IR signal, it should send "pairing request packet" to the RF receiver.
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WIFI Built in ass’y feature Block diagram 30 48 3.3V Wafer USB DP, DN 3.3V DCDC EUP3010 1.2V - Pin map GND 6pin 1.25mm WOL 3.3V 1.2V RX/TX USB DP, DN Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes Antenna 2.4G/5G BCM43236B RX/TX Crystal 20MHz Switch DM3030 Switch DM3030 27 / 90 Antenna 2.
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Widevine & HDCP 2.0 & NETFLX Contents 표지 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM 2012. 12. 08 LCD TV LCD TV R&D Lab / HW1 team Copyright © 2013 LG Electronics. Inc. All rights reserved.
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1. Widevine? [Widevine] Widevine is the Solution(Library) offering Adaptive Streaming and DRM. In BBTV, when special CP do service, this module is required key. Currently CP which is requested to widevine, is typically Australian Bigpond Live and North American CinemaNow. Furthermore, because the future will be the spread of CP, widevine key download for the global model should be applied to production.
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2. HDCP 2.0 & NETFLIX?  HDCP  High-bandwidth Digital Content Protection  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.  Specification developed by Intel Corporation to protect digital entertainment across the DVI/HDMI interface.  Why HDCP2.0?  HDCP revision 2.0 supports a broader range of wired and wireless interfaces.
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3. DTCP? [DTCP] The Digital Transmission Content Protection Specification defines a cryptogrphic protocol for protecting audio/video entertainment content from unauthorized copying, intercepting, and tampering as it traverses digital transmission mechanisms such as a high-performance serial bus that conforms to the IEEE 1394-1995 standard.
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Contents of LCD TV Standard Repair Process No. Error symptom (High category) Error symptom (Mid category) Page 1 No video/Normal audio 37 2 No video/No audio 38 3 A.
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Contents of LCD TV Standard Repair Process Detail Technical Manual No. Error symptom 1 2 3 Content Check LCD back light with naked eye A. Video error_ No video/Normal audio Page A1 LED driver B+ 24V measuring method Check White Balance value A4 Power Board voltage measuring method A5 TUNER input signal strength checking method A6 LCD-TV Version checking method A7 9 LCD TV connection diagram A8 10 Tuner Checking Part A9 4 6 7 11 A. Video error_ No video/Video lag/stop A.
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Contents of LCD TV Standard Repair Process Detail Technical Manual Continued from previous page No. Error symptom Content Page 21 Check front display LED A17 22 Check power input Voltage & ST-BY 3.5V A18 Checking method when power is ON A19 POWER BOARD voltage measuring method A5 23 B. Power error_No power 24 Remarks 25 26 B. Power error_Off when on, off while viewing POWER OFF MODE checking method A22 27 B.
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Standard Repair Process Error symptom LCD TV A. Video error Established date No video/ Normal audio Revised date 2012. 12 .06 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) ☞A1 No video Normal audio Normal audio Y Check Back Light On with naked eye N Move to No video/No audio ☞A5 Y On Check Power Board 12v,3.5v etc.
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Standard Repair Process LCD TV Error symptom A. Video error Established date No video/ No audio Revised date 2012. 12 .06 ☞A5 No Video/ No audio Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) Normal voltage? Y N Check and replace MAIN B/D End Replace Power Board and repair parts Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Error symptom LCD TV ☞ A6 Check RF Signal level Normal Signal? Y A. Picture Problem Established date Picture broken/ Freezing Revised date 2012. 12 .06 . By using Digital signal level meter . By using Diagnostics menu on OSD ( Menu→ Set up→ Support → Signal Test ) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%) Check whether other equipments have problem or not.
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Standard Repair Process Error symptom LCD TV ☞ A6 Check RF Signal level Normal Signal? Y N A. Picture Problem (DVB-S/S2) Established date Tuning fail, Picture broken/ Freezing Revised date 2012. 12 .06 Check RF signal cable (DVB satellite signal or not) Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) → Set-Top-Box, Different maker TV etc Check satellite setting. - Check LNB frequency.
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Standard Repair Process LCD TV Error symptom A. Video error Established date Color error Revised date 2012. 12 .
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Standard Repair Process LCD TV Established date A. Video error Error symptom Vertical / Horizontal bar, residual image, light spot, external device color error 2012. 12 .
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Standard Repair Process LCD TV Error symptom B. Power error Established date No power Revised date ☞A17 Check Logo LED 2012. 12 .06 ☞A19 DC Power on by pressing Power Key On Remote control Y Power LED On? N Normal operation? N Check Power On ‘”High” OK? Y Replace Power B/D Y Check Power cord was inserted properly Replace Main B/D ☞A5 N Measure voltage of each output of Power B/D Normal? Y Y ※ Close Check ST-BY 3.
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Standard Repair Process LCD TV Established date B. Power error Error symptom Off when on, off while viewing, power auto on/off 2012. 12 .
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Standard Repair Process LCD TV Error symptom C. Audio error Established date No audio/ Normal video Revised date ☞A24 No audio Screen normal Check user menu > Speaker off 2012. 12 .06 ☞A25 N Off Check audio B+ 24V of Power Board Normal voltage Y N Cancel OFF Check Speaker disconnection Y Replace Power Board and repair parts Disconnection N Replace MAIN Board End Y Replace Speaker Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process LCD TV C. Audio error Error symptom Wrecked audio/ discontinuation/noise Established date 2012. 12 .
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Standard Repair Process Error symptom LCD TV D. General Function Problem Established date Remote control & Local switch checking Revised date 2012. 12 .06 1. Remote control(R/C) operating error ☞A27 Check R/C itself Operation ☞A27 Check & Repair Cable connection Connector solder Normal Y operating? N Check R/C Operating When turn off light in room If R/C operate, Explain the customer cause is interference from light in room. Normal operating? N Y ☞A27 Check B+ 3.
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Standard Repair Process LCD TV Check input signal Signal input? Established date D. Function error Error symptom External device recognition error Y N Check and fix external device/cable Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes Check technical information - Fix information - S/W Version Technical information? 2012. 12 .
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Standard Repair Process LCD TV Identify noise type Error symptom Circuit noise Mechanical noise E. Noise Established date Circuit noise, mechanical noise Revised date Check location of noise Replace PSU(with LED driver) OR Replace LED driver Check location of noise ※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description) ※ Mechanical noise is a natural phenomenon, and apply the 1st level description.
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Standard Repair Process LCD TV F. Exterior defect Error symptom Zoom part with exterior damage Exterior defect Module damage 2012. 12 .06 Revised date Adjust VCOM ☞A28 Cabinet damage Remote controller damage Stand dent Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Error symptom LCD TV Check Network status Normal Signal? Y N Established date G. Network Error Exterior defect 2012. 12 .06 Revised date Check Wired ethernet cable connection Check whether AP has a probelm or not. Setting  Network  Networ Status Check Network connection Case1 WiFi .
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Standard Repair Process LCD TV Error symptom Exterior defect Established date 2012. 12 .06 Revised date Check defect CI slot pin Check it’s worked CI+ 1.2 or 1.3 Setting  Antenna  CI information Check CI CAM status Read Y Information? G.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_No video/Normal audio Content Check LCD back light with naked eye Established date Revised date 2012. 12 .06 A1 After turning on the power and disassembling the case, check with the naked eye, whether you can see light from 4 locations. Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom Content A. Video error_No video/Normal audio Check White Balance value Established date Revised date 2012. 12 .06 A4 Entry Entry method method 1. 1. Press Press the the ADJ ADJ button button on on the the remote remote controller controller for for adjustment. adjustment. 2. 2. Enter Enter into into White White Balance Balance of of item item 6. 10. 3.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_No video/ Audio Content Power Board voltage measuring method Established date Revised date 2012. 12 .06 A5 Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) SMAW200-H24S Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes 1 Power on 2 Inverter On/off 3 3.5V 4 PWM Dim #1 5 3.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_Video error, video lag/stop Content TUNER input signal strength checking method Established date Revised date 2012. 12 .06 A6 MENU  support  signal test  select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual Error symptom LCD TV Content A. Video error_Video error, video lag/stop LCD-TV Version checking method Established date Revised date 2012. 12 .06 A7 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom Content A. Video error _Vertical/Horizontal bar, residual image, light spot LCD TV connection diagram (1) Established date Revised date 2012. 12 .06 A8 As the part connecting to the external input, check the screen condition by signal Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_Video error, video lag/stop Content TUNER checking part Established date Revised date 2012. 12 .06 A9 Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_Color error Content Adjustment Test pattern - ADJ Key Established date Revised date 2012. 12 .06 A12 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/D!) Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Appendix : Exchange EPI Cable or Main B/D (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con T-Con Defect, Defect, CNT CNT Broken Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Appendix : Exchange the Module (1) Panel Mura, Light leakage Crosstalk Panel Mura, Light leakage Press damage Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Appendix : Exchange the Module (2) Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Vertical Line Source TAB IC Defect Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Vertical Block Source TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom B. Power error _No power Content Check front display LED Established date Revised date 2012. 12 .06 A17 You can set the LG Logo Light to on or off by selecting OPTION in the main menus.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom B. Power error _No power Content Check power input voltage and ST-BY 3.5V Established date Revised date 2012. 12 .06 A18 Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) SMAW200-H24S Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes 1 Power on 2 Inverter On/off 3 3.5V 4 PWM Dim #1 5 3.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom B. Power error _No power Content Checking method when power is ON Established date Revised date 2012. 12 .06 A19 Check “power on” pin is high 24 Pin (Power Board ↔ Main Board) SMAW200-H24S Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes 1 Power on 2 Inverter On/off 3 3.5V 4 PWM Dim #1 5 3.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom B. Power error _Off when on, off whiling viewing Content POWER OFF MODE checking method Established date Revised date 2012. 12 .06 A22 Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual Error symptom LCD TV Content C. Audio error_No audio/Normal video Checking method in menu when there is no audio Established date Revised date 2012. 12 .06 A24 Checking method 1. Press the MENU button on the remote controller 2. Select the SOUND function of the Menu 3. Change TV Sound Out to TV Speaker Copyright © 2013 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom C. Audio error_No audio/Normal video Content Voltage and speaker checking method when there is no audio Established date Revised date 2012. 12 .06 A25 24 Pin (Power Board ↔ Main Board) ① SMAW200-H24S ② 1 Power on 2 Inverter On/off 3 3.5V 4 PWM Dim #1 5 3.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom D. Function error_ No response in remote controller, key error Content Remote controller operation checking method Established date Revised date 2012. 12 .06 A27 P4101 ③ ④ 1 2 3 4 5 6 7 8 GND KEY1 KEY2 +3.5V_ST GND LOGO/LED_R IR GND ② ① Checking order 1, 2. Check IR cable condition between IR & Main board. 3. Check the st-by 3.5V on the terminal 4. 4.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom D. VCOM Adjustment Content Sequence of the Vcom adjustment Established date Revised date 2012. 12 .06 A28 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 controller, And find the V-COM value Which is no or minimized the Flicker.