User's Manual

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Printed in KoreaP/NO : MFL67360902 (1202-REV00)

CHASSIS : LD22E

MODEL : 37LS570S 37LS570S-ZB

MODEL : 37LS570T 37LS570T-ZB

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

LED LCD 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 (119 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 LCD TV SERVICE MANUAL CHASSIS : LD22E MODEL : 37LS570S MODEL : 37LS570T 37LS570S-ZB 37LS570T-ZB 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 LCD TV used LD22E chassis. 3. Test method 2. Requirement for Test Each part is tested as below without special appointment.
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No.
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5. Component Video Input (Y, Cb/Pb, Cr/Pr) No. Resolution H-freq(kHz) V-freq(Hz) Porposed 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, DVD 625 Line 6 720×576 31.25 50.00 HDTV 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 1920×1080 33.75 60.
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7. HDMI Input 7.1. DTV mode No. Resolution H-freq(kHz) V-freq.(kHz) Proposed 1. 640*480 2. 720*480 31.469 / 31.5 59.94/60 SDTV 480P 31.469 / 31.5 59.94 / 60 SDTV 480P 3. 4. 720*576 31.25 50 SDTV 576P 720*576 15.625 50 SDTV 576I 5. 1280*720 37.500 50 HDTV 720P 6. 1280*720 44.96 / 45 59.94 / 60 HDTV 720P 7. 1920*1080 33.72 / 33.75 59.94 / 60 HDTV 1080I 8. 1920*1080 28.125 50.00 HDTV 1080I 9. 1920*1080 26.97 / 27 23.97 / 24 HDTV 1080P 10.
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ADJUSTMENT INSTRUCTION 1. Application Range 3.1.3. Adjustment This specification sheet is applied to all of the LED LCD TV with LD22E chassis. 2. Designation (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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3.2. M AC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L 3.3.3. WIDEVINE key Inspection - Confirm key input data at the "IN START" MENU Mode. Connect: USB port Communication Prot connection ▪ Com 1,2,3,4 and 115200(Baudrate) Mode check: Online Only ▪ check the test process: DETECT -> MAC -> CI -> Widevine -> ESN ▪. Play: START ▪. Result: Ready, Test, OK or NG ▪. Printer Out (MAC Address Label) G 3.4. LAN PORT INSPECTION(PING TEST) Connect SET → LAN port == PC → LAN Port SET PC 3.4.1.
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3.5. Model name & Serial number Download 2) Check the key download for transmitted command (RS232: ci 00 10) 3.5.1. Model name & Serial number D/L Press "Power on" key of service remote control. (Baud rate : 115200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ Write Serial number by use RS-232. ▪ Must check the serial number at Instart menu. ▪ CMD 1 CMD 2 C I Data 0 1 0 3) Result value - Normally status for download : OKx - Abnormally status for download : NGx 3.5.2.
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4. Manual Adjustment * ADC adjustment is not needed because of OTP(Auto ADC adjustment) 4.1 EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download 4.1.1. Overview It is a VESA regulation. A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input. It is a realization of "Plug and Play". 4.1.2. Equipment - Since embedded EDID data is used, EDID download JIG, HDMI cable and D-sub cable are not need.
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4.2. White Balance Adjustment Ex) wb 00 00 -> Begin white balance auto-adj. wb 00 10 -> Gain adj. ja 00 ff -> Adj. data jb 00 c0 ... ... wb 00 1f → Gain adj. completed *(wb 00 20(Start), wb 00 2f(end)) → Off-set adj. wb 00 ff → End white balance auto-adj. 4.2.1. Overview ▪ W/B adj. Objective & How-it-works (1) Objective: To reduce each Panel's W/B deviation (2) How-it-works : When R/G/B gain in the OSD is at 192, it means the panel is at its Full Dynamic Range.
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▪ Adjustment condition and cautionary items 1) Lighting condition in surrounding area Surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding. 2) Probe location : Color Analyzer(CA-210) probe should be within 10 cm and perpendicular of the module surface.(80° ~ 100°) 3) Aging time - After Aging Start, Keep the Power ON status during 5 Minutes. - In case of LCD, Back-light on should be checked using no signal or Full-white pattern. 4.3.
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4.7. Wi-Fi Test 4.8. LNB voltage and 22KHz tone check Step 1) Turn on TV Step 2) Select Network Connection option in Network Menu. (only for DVB-S/S2 model) ▪ Test method (1) Set TV in Adj. mode using POWER ON. (2) Connect cable between satellite ANT and test JIG. (3) Press Yellow key(ETC+SWAP) in Adj Remote control to make LNB on. (4) Check LED light ‘ON’ at 18 V menu. (5) Check LED light ‘ON’ at 22 KHz tone menu. (6) Press Blue key(ETC+PIP INPUT) in Adj Remote control to make LNB off.
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6. USB S/W Download(Service only) 4.12. GND and Internal Pressure check 4.12.1. Method (1) Put the USB Stick to the USB socket. (2) 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, USB data is automatically detecting. (Download Version High & Power only mode, Set is automatically Download) (3) Show the message "Copying files from memory".
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SCREW ASSEMBLY WORKING GUIDE ■ Screw specification and application situation ‫ ח‬ͷͲͳͤͤͤͪͥͣ͢͡ A A A A ͙;ͤ͛ͽͥͦ͑͟͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ‫ͣ͢ ח‬ͶͲ A A B B A ‫ ח‬ͷͲͳͤͨͩͩͣ͑͢͡͡ ͙;ͧ͛ͽ͑͢͡͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ͥͶͲ A B B A A C C A A C C C C C C ‫ ח‬ͷͲͳͤͤͤͪͣ͢͢͡ ͙;ͤ͛ͽ͑͢͡͝ͳͼ͑͝΅ΒΡΥΚΥΖ͚ ‫ͩ ח‬ͶͲ D D D D ‫ ח‬ͷͲͳͤͧͣͣ͑͢͢͡͡ ͙;ͥ͛ͽͣ͑͡͝ͳͼ͑͝΅ΒΡΥΚΥΖ͚ ‫ͥ ח‬ͶͲ Check Screw Type When Screw is assembled at 'A' Part. If 'C' Screw is used at the 'A' part, Module will get damaged. Copyright © LG Electronics. Inc.
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EXPLODED VIEW IMPORTANT SAFETY NOTICE Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes - 20 - A21 A2 300 510 A5 A7 310 A10 120 * Set + Stand * Stand Base + Body 200 900 910 530 LV1 540 810 521 400 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.
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EAX6430790* : LD22* / LC22* EAX6443420* : LT22* / LJ22* / LA22* / LB22* Crystal Matching Test result : 27pF -> 20pF -> 24pF IC104-*1 M24256-BRMN6TP NVRAM +3.3V_NORMAL E0 E1 E2 R103 4.7K R105 4.7K OPT R104 VSS 8 2 7 3 6 4 5 A1 A2 1 8 2 7 3 6 X-TAL IC104-*2 R1EX24256BSAS0A VCC A0 WC A1 SCL A2 SDA VSS NVRAM_ST A0 4.7K OPT +3.3V_NORMAL IC104 AT24C256C-SSHL-T 1 1 8 2 7 3 6 4 5 +3.
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PLACE AT JACK SIDE C319 10uF 16V 1608 sizs For EMI R314 PC_L_IN PC_L_IN_SOC 1608 sizs For EMI R333 0 R300 C300 560pF 50V OPT 470K OPT C314 100pF 50V OPT AV1_CVBS_IN AV1_CVBS_IN_SOC 1608 sizs For EMI R336 120-ohm C344 27pF 50V OPT ZD300 5.48VTO5.76V C320 10uF 16V ZD301 5.48VTO5.76V C348 100pF 50V R330 75 1% C340 47pF 50V PC_R_IN_SOC PC_R_IN 1.0Vpp 0 1608 sizs For EMI 0 COMP1_Y C315 100pF 50V OPT C301 560pF 50V OPT R301 470K OPT ZD303 5.48VTO5.
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+3.3V_NORMAL +1.2V_MTK_CORE VDD3V3 C503 10uF C500 10uF 5600mA 60mA L500 BLM18PG121SN1D C510 0.1uF C506 10uF C524 10uF C504 2.2uF C529 0.1uF C505 10uF C532 0.1uF IC105 LGE2112 C535 0.1uF IC105 LGE2112 +1.2V_MTK_CORE +1.2V_MTK_CORE AR7 AT7 AU7 AP8 AR8 +1.2V_MTK_CORE AT8 AU8 AM7 C539 10uF C543 0.1uF C546 0.1uF C548 0.1uF C550 0.1uF C552 0.1uF AN7 C553 0.1uF AP7 AM8 AN8 P14 R14 T14 VDD3V3 U14 AVDD_33SB V14 L501 BLM18PG121SN1D W14 Y14 AA14 C501 0.1uF +1.2V_MTK_CORE +1.
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PLACE AT JACK SIDE R610 51K SC_ID_SOC SC_ID 1/16W 1% EU R613 10K EU READY FOR FILTER (EMI) R611 SC_CVBS_IN SC_CVBS_IN_IF 120-ohm C601 10pF OPT C607 100pF EU EU R604 75 1% EU SC_FB_SOC SC_FB R608 75 1% EU R609 22 EU PLACE AT MAIN SOC SIDE R623 SC_R R605 75 1% EU C615 100 0.01uF EU C604 10pF EU R622 SC_R_SOC EU C614 100 0.01uF SC_G_SOC SC_G R606 75 1% EU EU C605 10pF EU R620 EU 100 C612 0.01uF 100 C613 EU 0.
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+1.5V_DDR IC703 H5TQ2G63BFR-PBC IC701 H5TQ2G63BFR-PBC A_RVREF2 A_RVREF4 M8 A0 VREFCA A1 A_RVREF1 A_RVREF1 C713 0.1uF R706 1K 1% A3 VREFDQ R710 R707 1K 1% A2 H1 1% 240 A4 A5 L8 A6 ZQ C714 0.1uF +1.5V_DDR A7 A8 B2 D9 G7 +1.5V_DDR K2 K8 A_RVREF4 C715 0.
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CI_DATA[0-7] CI_A_DATA[0-7] CI_A_DATA[0] AR904 0 CI CI_A_DATA[1] CI DETECT CI_DATA[1] CI_A_DATA[2] CI_DATA[2] CI_A_DATA[3] CI_DATA[3] CI_A_DATA[4] +3.
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FROM LIPS & POWER B/D PANEL_POWER L2408 BLM18SG121TN1D Q2401 R2408 3 GND 3.5V 9 10 3.5V 3.5V 11 12 3.5V GND 13 14 GND R2423 0 L/DIM0_VS POWER_16_VSYNC GND 15 16 GND/V-sync 12V 17 18 INV ON R2425 100 12V 19 20 A.DIM A_DIM 21 22 P.DIM1 GND/P.DIM2 23 24 Err OUT C2401 0.1uF 50V 25 SMAW200-H24S2 P2401 #16/#20/#23 LD - GND OR USE LE(N.L.D.) - OPEN LE(L.D.) - USE D S R2442 10K MTK_EPI Q2406 MMBT3904(NXP) PWM_DIM1 E +3.3V_NORMAL R2424 4.
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Renesas MICOM +3.3V_NORMAL R3035 4.7K OPT For Debug 12V_EXT_PWR_DET 10K HDMI_WAUP:HDMI_INIT R3000 +3.5V_ST COMMERCIAL_12V_CTL 7 8 GND +3.5V_ST MICOM_RESET 22 (GP3_Soft touch) MHL MODEL_OPT_6 NON_GED GED P120/ANI19 KEY1 MODEL1_OPT_1 10K OPT SIDE_HP_MUTE MODEL1_OPT_4 MODEL1_OPT_3 24 23 22 P27/ANI7 21 25 20 12 19 P26/ANI6 18 26 17 R3036 MODEL1_OPT_0 27 16 +3.
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5V_HDMI_4_JACK 5V_HDMI_3_JACK BODY_SHIELD R3312 4.
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RGB/ PC AUDIO/ SPDIF RGB_5V RGB PC +5V_NORMAL RGB_5V A1 C 8 R3642 2.7K 2.7K VCC R3645 10K RGB_EDID E1 E2 VSS 2 7 3 6 4 5 JK3602 2F11TC1-EM52-4F +3.3V_NORMAL WC EDID_WP R3643 SCL 22 SPDIF OUT RGB_DDC_SCL R3644 SDA 22 RGB_DDC_SDA C3633 18pF 50V C3634 18pF 50V R3615 33 R3620 2.7K OPT SPDIF_OUT D3613-*1 5.5V ADUC 5S 02 0R5L ESD_MTK DSUB_VSYNC D3621 ADUC 5S 02 0R5L 5.5V OPT D3615 30V OPT D3613 5.5V ADUC 5S 02 0R5L OPT C3615 0.
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HP_LOUT JK3700 KJA-PH-0-0177 +3.3V_NORMAL GND 5 R3700 10K HP_OUT HP_DET HP_ROUT L 4 DETECT 3 R 1 EAG61030001 HP_OUT VA3700 5.6V OPT ESD for MTK ESD for LG1152 VA3700-*1 VA3700-*2 5.6V 5.6V ESD_MTK_HP_OUT ESD_LG1152_HP_OUT THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
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12V_COMMERCIAL_OUT 12V 1A FOR COMMERCIAL(RS-232C POWER) 12V_COMMERCIAL_OUT CVBS 1 PHONE JACK RS232C 10 5 +3.3V_NORMAL 9 4 IR_OUT IC3800 0.1uF C1+ C3800 1 16 0.1uF +3.5V_ST V+ C3801 2 15 3 14 GND D3805 20V OPT D3804 20V OPT RS232 C1- 3 DOUT1 AV1_CVBS_DET 7 RS232 100 R3821 VCC RS232 R3810 10K 8 RS232 100 R3820 +3.5V_ST MAX3232CDR 2 JK3800 KJA-PH-1-0177 6 OPT_RS232 R3834 1 10K D3800 5.
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+3.5V_ST IR & KEY RGB Sensor EEPROM_SCL C KEY2 C4100 0.1uF +3.5V_ST R4107 10K B E EEPROM_SDA R4114 100 +3.5V_ST COMMERCIAL_IR R4103 3.3K R4102 10K IR Q4100 MMBT3904(NXP) COMMERCIAL_IR KEY1 COMMERCIAL_IR R4101 1K R4104 47K COMMERCIAL_IR C IR_BYPASS +3.5V_ST E C4102 0.1uF R4124 100 1 2 D4101 5.6V AMOTECH CO., LTD. OPT D4106 ADUC 20S 02 010L 20V OPT D4100 5.6V AMOTECH CO., LTD.
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+3.3V_NORMAL +5V_USB FOR USB1 R4327 10K OPT MAX 2A R4323 10K POWER_ON/OFF2_4 IC4303 TPS2554 11 3AU04S-305-ZC-(LG) JK4303 1 R1 R4336 20K C4328 0.01uF 50V ILIM1 OPT C4338 1000pF 50V USB_DM1 2 C4334 4700pF 50V 6 1% R2 2K R4339 USB_DP1 Vout=0.8*(1+R1/R2) DVR Ready MAX 1.
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+3.3V_NORMAL +12V EU R4601 10K Full Scart(18 Pin Gender) CLOSE TO JUNCTION SC_DET EU E MMBT3906(NXP) Q4600 EU D4611-*1 5.6V 200pF D4611-*2 5.6V 200pF D4611 5.6V OPT ESD_LG1152_SCART C4604 0.1uF C ESD_MTK_SCART SC_CVBS_IN D4609-*2 5.5V 15pF ESD_LG1152_SCART D4609-*1 5.5V 15pF ESD_MTK_SCART D4609 5.5V OPT SHIELD AV_DET 17 16 15 14 13 12 11 75 COM_GND EU Q4601 EU MMBT3904(NXP) C R4602 390 B Gain=1+Rf/Rg Rf R4600 EU C4605 100uF 16V D4610-*1 5.5V 15pF ESD_MTK_SCART SYNC_OUT EU C4606 0.
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ZigBee_Radio Pulse M_REMOTE OPTION +3.3V_NORMAL P4800 12507WR-08L L4800 120-ohm M_REMOTE 1 M_REMOTE 3.3V C4800 2 3 4 5 6 7 8 GND 0.1uF AR4800 100 1/16W RX M_REMOTE_RX TX M_REMOTE_TX RESET M_RFModule_RESET DC M_RFModule_ISP DD 3D_SYNC_RF GND M_REMOTE 9 3D_SYNC_RF Only For PDP ALL M_REMOTE OPTION THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
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Ethernet Block LAN_JACK_POWER C5000 0.1uF 16V C5001 0.01uF 50V C5002 0.1uF 16V C5003 0.01uF 50V JK5000 XRJH-01A-4-DA7-180-LG(B) LAN_XML 1 2 3 4 5 6 7 8 9 10 11 D1 D2 D3 D4 P1[CT] P2[TD+] EPHY_TDP P3[TD-] EPHY_TDN P4[RD+] EPHY_RDP P5[RD-] EPHY_RDN P6[CT] P7 D5000 D5001 D5002 5.5V OPT 5.5V OPT 5.5V OPT D5003 5.5V OPT P8 P9 P10[GND] P11 YL_C YL_A GN_C GN_A ESD for MTK ESD for LG1152 12 ESD_LG1152 SHIELD D5000-*1 ESD_MTK D5000-*2 ADUC 5S 02 0R5L 5.
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+24V +24V_AMP +3.
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+12V EU AUD_OUT >> EU/CHINA_HOTEL_OPT IC6000 AZ4580MTR-E1 L6000 EU EU R6000 OUT1 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 50V SIGN600005 R6011 2.2K [SCART AUDIO MUTE] EU C6008 DTV/MNT_R_OUT EU 3 VCC 6 IN2- R6008 EU 33K OPT R6010 470K 5 OPT 1uF C6007 25V DTV/MNT_L_OUT 6800pF +3.
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+3.3V_NORMAL EARPHONE AMP L6100 120-ohm BLM18PG121SN1D C6105 10uF 10V C6107 0.1uF 16V HP_LOUT_AMP C6104 1uF 10V C6100 1uF 10V 16 INL- 15 +3.3V_NORMAL EN VDD SGND OUTL Close to the IC 14 13 1 12 2 11 HPVDD C6108 2.2uF 10V R6104 100K OPT R6105 4.7K HP_LOUT_MAIN C6103 1uF 10V INR- HP_ROUT_MAIN 10 3 4 6 THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
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CI POWER ENABLE CONTROL +5V_CI_ON +5V_NORMAL G C6202 0.1uF 16V D CI OPT S Q6201 AO3407A CI R6241 22K R6221 10K OPT R6223 4.7K PCM_5V_CTL R6218 10K CI C6207 4.7uF 10V OPT C6210 1uF 25V OPT R6248 10K CI R6242 2.2K CI C Q6200 MMBT3904(NXP) CI B CI E Option FOR MTK Option FOR LG1152 C6210-*1 1uF 25V CI_MTK THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
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T/C/S & H/NIM & T2/C TUNER(EU & CHINA) RF_SWITCH_CTL USE: T2/C,T/C,ATSC,DTMB.ISDB-T TU6501 TDSN-G351D TU6500 TDSS-G151D TU6504 TDSH-T151F TU6502 TDSQ-H051F TU6503 TDSQ-G051D +3.3V_TU CHB +5V_TU L6508 BLM18PG121SN1D RESET T/C_H/NIM_V 1 2 NC T2/C_F/NIM_DEV NC_1 1 RESET CHB_V 2 RESET 3 SCL T/C/S2_V +5V[SPLITTER] 1 1 2 RESET 3 TU_SCL CHB N.C_1 RF_SWITCH OPT R6511 100K C6520 0.
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DCDC_GND and A_GND are connected DCDC_GND and A_GND are connected in pin#27 PCB_GND and A_GND are connected DVB-S2 LNB Part Allegro (Option:LNB) Input trace widths should be sized to conduct at least 3A Ouput trace widths should be sized to conduct at least 2A 2A D6901-*1 LNB_SX34 D6903-*1 40V 40V LNB_SX34 D6901 LNB_SMAB34 D6903 C6901 0.
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FOR COMMERCIAL 12V OUT RS-232C 9 PIN (OPT:COMMER_EXT_12V) R7001 100 IC7000 MP5000DQ GND C7000 470pF 50V DV/DT 1 10 2 9 SOURCE_5 +3.5V_ST FOR COMMERCIAL AUDIO OUT (OPT:COMMER_EXT_AMP) SOURCE_4 12V_COMMERCIAL_OUT R7000 1K ENABLE/FAULT COMMERCIAL_12V_CTL FOR 12V CONTROL (FROM MICOM) I-LIMIT NC 3 8 4 7 5 6 R7006 10K SOURCE_3 L7000 BLM18PG121SN1D SOURCE_1 C7003 22uF 25V C7004 0.
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LVDS LVDS_51PIN P7100 FI-RE51S-HF-J-R1500 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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 [51Pin LVDS OUTPUT Connector] NC NC R7100 33 LGD_2D/3D_CTRL [41Pin LVDS OUTPUT Connector] 2D/3D_CTL LVDS_SEL NC NC NC AUO_65_MIRROR R7105 33 CP_BOX R7106 33 CP_BOX +3.3V_NORMAL I2C_SDA1 I2C_SCL1 R7101 3.
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LOCAL DIMMING [To LED DRIVER] P7600 12507WR-08L L/DIM_OUT +3.3V_NORMAL R7600 10K OPT 1 2 R7601 10K L/DIM_OUT AR7600 33 1/16W 3 L/DIM0_SCLK 4 5 L/DIM0_MOSI 6 I2C_SCL1 7 8 L/DIM_OUT I2C_SDA1 R7606 33 L/DIM0_VS L/DIM_OUT 9 THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
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VCOM_P VCOM_N VCOM_LOOP VCC18 L7700 0 R7708 GMA4 DYN VCOMFB POS NEG VCOM GMA6 GMA5 GMA4 GMA3 GMA2 GMA1 45 44 43 42 41 40 39 38 37 32 TPS65178RSLR 31 CTRLP SWB2 6 7 30 TCOMP 8 29 VL SWB1_2 9 28 SDA 1/16W R7739 1.5K 1/16W 5% C7756 1uF 25V C7733 10uF 16V C7746 C7748 1uF 25V 1uF 25V D7704 1N4148W VGH SWP CTRLP E R7727 C7722 10uF 16V 0 1/16W VDD B C7731 0.
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eMMC I/F EMMC_VCCQ 10K 10K 10K 10K R8104 R8105 R8106 R8107 EMMC_DATA[0] A3 EMMC_DATA[1] A4 EMMC_DATA[2] A5 EMMC_DATA[3] EMMC_DATA[4] B2 EMMC_DATA[5] B4 B3 EMMC_DATA[6] EMMC_DATA[7] B5 AR8101 22 1/16W B6 DAT0 NC_25 DAT1 NC_26 DAT2 NC_27 DAT3 NC_28 DAT4 NC_29 DAT5 NC_30 DAT6 NC_31 DAT7 NC_32 NC_33 NC_34 M6 M5 CLK NC_35 CMD NC_36 NC_37 NC_38 A6 C5 E5 E8 AR8102 E9 22 E10 EMMC_CMD F10 EMMC_RST G3 G10 H5 OPT J5 C8107 10pF 50V K6 K7 K10 P7 P10 NC_3 NC_39 N
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BLM18PG121SN1D L8900 LOGO_LIGHT +3.5V_ST Place Near Micom +3.5V_ST P8900 12507WR-03L 1 LOGO_LIGHT 2 10K R8902 OPT R8900 22 LOGO_LIGHT LOGO_LIGHT B 3 4 C LOGO_LIGHT LOGO_LIGHT R8901 10K LOGO_LIGHT C8900 0.1uF 16V Q8900 1K R8903 E LOGO_LIGHT MMBT3904(NXP) THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
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◈ CONTENT ◈ New features Main PCBs Block Diagrams, IIC Map Structure of TV set and connection of sub ass’ys New sub ass’ys - Instruction of new sub ass’ys - How to use tool - Download Adjust way of new features (widevine…) Repair guide The latest issue and concerning issue Copyright © 2012 LG Electronics. Inc. All rights reserved.
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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 © 2012 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) -Difficult to upgrade bandwidth limit -Multiple number of wires needed for higher bandwidth HF mini-LVDS TCON 18 VCC 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 2 1 Protocol Features @10bit, FHD120 Merit Demerit • Multi Drop • Data rate: 660Mbps • External clock • Point to Point • Data rate : 1.
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Main PCB for Broadband Main + TCON all in one 1 xxLM760S-ZB Chassis : LD22E PCB P/No : EAX64307905 2 G/S model To PSU 3 5 LNB IC Only G/S model 2 1 To module WIFI 6 Soft touch +IR 4 Front Spk RF Assy Copyright © 2012 LG Electronics. Inc. All rights reserved.
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MTK5369 Block Diagram( LM76 ) ANALOG DEMOD Air/ Cable CI slot TUNER (T/C) DIGITAL DEMOD (T/C) P_TS P_TS IF(+/-) CVBS DVB-S TUNER (S2) P_TS USB1 USB2 LNB CONTROLER A/B CVBS TS_S/P Power load Side HDMI2 eMMC X 1 (4GB) (HDCP HDMI MUX HDMI3 SYSTEM DDR3 X 1600 X 16 (2Gb) SYSTEM EEPROM X 1 (256Kb) USB USB3 USB_WIFI HDMI1 SYSTEM DDR3 X 1600 X 16 (2Gb) DDR T/C Demod DIGITAL DEMOD (S2) SYSTEM DDR3 X 1600 X 16 (2Gb) SYSTEM DDR3 X 1600 X 16 (2Gb) X_TAL 27MHz EEPROM) LVDS HDMI4 51P 41P 5
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Jack Interface Main SoC MTK SPDIF_OUT [SPDIF_OUT] [ASPDIF0] SPDIF Full Scart(18 Pin Gender) SC_R/G/B + [PR0P],[PB0P],[Y0P] SC_DET [OPCTRL8] SC_L/R_IN [AIN0_L_ADDC] [AIN0_R_AADC] SC_FB [SOY0] SC_ID [ADIN0_SRV] SC_CVBS_IN [CVBS2P] DTV/MNT_V_OUT DTV/MNT_L_OUT DTV/MNT_R_OUT AV1_CVBS_IN AV1_L_IN AV1_R_IN AV1_CVBS_DET [CVBS0P] [AIN3_L_AADC] [AIN3_R_AADC] [OPCTRL5] CVBS 1 PHONE JACK [AL0_ADAC] [AR0_ADAC HP_LOUT_MAIN HP_ROUT_MAIN IC6100 TPA6132A2 HP_LOUT_AMP HP_ROUT_AMP EARPHONE JACK [VDACX
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GP4 Backend block diagram (EPI & T-con) VCC 50Pin EPI LEFT SWN VGL_FB CTRLN IC7700 TPS65178 VDD CTRLP VGH_FB Main SoC MTK [TCON6] [TCON5] VCOM, GIP_RST DISCHG EO_SOC EO GST_SOC GST MCLK_SOC [TCON4] [TCON3] VGL_I VCOM_P/N/LOOP SWP R (47옴) GCLK_SOC MCLK GCLK R(0옴) OPT VGL_I VGH_ODD, VGH_EVEN IC7701 TPS65198 VGH_R, VGH_F, VST CLK1~6_I R CLK1~6 (0옴) 50Pin EPI RIGHT Copyright © 2012 LG Electronics. Inc. All rights reserved.
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GP4 Backend block diagram (EPI & T-Con) VCC18 50Pin EPI LEFT Vcore H_VDD VDD TXA1N/P, TXACLKN/P, TXA4N/P EPI CH1/2/3 [TCON8] PMIC_RESET [OPCTRL11] I2C_SDA2 [OPCTRL10] I2C_SCL2 IC7700 TPS65178 GMA[4][5][7][12][15] GMA[1][3][9][10][12][14][15][16][18] VCOM_DYN EPI_LOCK3 [TCON7] Z_OUT Main SoC MTK VCOMLFB EPI_LOCK6_SOURCE EPI_LOCK6 VCOMRFB EPI CH4/5/6 TXA0N/P, TXB1N/P, TXB2N/P VCC18 Vcore H_VDD VDD 50Pin EPI RIGHT Copyright © 2012 LG Electronics. Inc. All rights reserved.
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GP4 Backend block diagram (LVDS Tx & Local Dimming) [LDM_CK] [LDM_D0] [STB_SCL] [STB_SDA] L/DIMO_SCLK L/DIMO_MOSI I2C_SCL1 I2C_SDA1 L/DIMO_VS [LDM_VSYNC] Main SoC MTK PANEL_VCC (+12V) Dual-link LVDS Output 24 10-bit (R) LVDS Tx Block LVDS_SEL 51Pin LVDS Output BIT_SEL_LOW Dual-link LVDS Output 24 10-bit (R) 41Pin LVDS Output • LVDS_SEL : “H”=JEIDA, “L” or NC=VESA (LGD) • BIT_SEL : “H” or NC = 10-bit, “L” = 8-bit Copyright © 2012 LG Electronics. Inc. All rights reserved.
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Interconnection - 1 [PCBs] xxLM760S-ZA 3 6 2 1 1 Main PCB 2 Power Board 3 Tact key PCB 4 RF Assy 5 WIFI Assy 1 [Cables] 2 3 4 T-con Driver 5 7 5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
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2012Y IR + Soft touch PCB Pinmap Circuit Block Diagram KEY1, KEY2 Voltage (Tolerance of voltage ±0.2V) Ass’y Picture Pin Configuration Copyright © 2012 LG Electronics. Inc. All rights reserved.
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2012Y IR + Soft Touch LED Lighting Scenario Power LED Scenario Spec 내용 구분 - 12Y GP4 High(L9), GP4 Mid(MTK), GP4 Low(S7LR2) Æ “ Power Light” UI Delete compared with 11Y(GP3 model) - 11Y Carry Over Model : 12Y same Power LED scenario process Æ “ Power Light “ UI Delete, The way of 11Y Soft Touch Ass’y is used.
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Introductions of GP4 Sensor (Touch IC) Manual of Touch Sensitivity 1. Verify the number of THR at first. 2. Once you correctly touch Touch button for more than 1 sec, you can see a Touch data while you keep touching the button. 3. Keep in mind that you can only read the Touch data during touch status. 4. It doesn’t matter that Touch data gets low value after taking off your finger. Touch Key Threshold Level (Ta = 25ºC ) Copyright © 2012 LG Electronics. Inc. All rights reserved.
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Introductions of GP4 Sensor (Touch IC) Touch EEPROM Register change with USB port 1. Write all of the address, value (Hex) as a below. capable of only Touch.txt file based on the left picture 2. Make the file [ Filename : ‘Touch.txt’ ] and move it to USB (The outermost area, Don’t move it to any folder) 3. Connect USB to TV and press button ‘ADJ menu’ and then choose the ‘touch sensitivity setting’ 4. Press button ‘SIMPLINK (Simply Link key)’ and then you can see the OK Pop up. 5.
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1. System RF Remote UART or USB RF Receiver TV 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 (M3 vs.
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3. M4 Block Diagram MPU-3050 (Gyro) (Invensense) I2C Antenna Antenna I2C LIS331DLH(Accel.) (STMicro) BCM20702M X-tal 24 MHz BCM20733M (BROADCOM) Bluetooth 3.0 Voice (BROADCOM) Bluetooth 4.0 512Kbit (Serial Flash) SPI I2S 256Kbit (E2PROM) WM8950 (Wolfson) SPI X-tal 20 MHz MIC. (Knowles) Key Button (4x5) UART M4 4-mode Only Power Management Connector AA x 2 Battery DC-DC 2.8V LDO Bluetooth Remocon Copyright © 2012 LG Electronics. Inc. All rights reserved.
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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(0x29) to TV. • When TV receive the IR signal, it should send "pairing request packet" to the RF receiver.
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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 9 High-bandwidth Digital Content Protection 9 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. 9 Specification developed by Intel Corporation to protect digital entertainment across the DVI/HDMI interface. Why HDCP2.0? 9 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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4. Changed BOM As-Was Current Æ 추가 Add Item 1.Marlin (Yes/No) 2.CNTV (Yes/No) 3.HDCP Tx (Yes/No) 4.DTCP Rx (Yes/No) 5.HDCP Rx (Yes/No) 주3) CNTV [Yes] : China Smart TV Only Copyright © 2012 LG Electronics. Inc. All rights reserved.
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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 1 2 No video/No audio 2 3 A.
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Contents of LCD TV Standard Repair Process Detail Technical Manual No.
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Standard Repair Process Error symptom LCD TV A. Video error Established date No video/ Normal audio Revised date 2010. 12 .14 1/13 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 ☞A4 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 2010. 12 .14 2/13 ☞A4 No Video/ No audio Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) Normal voltage? N Y Check and replace MAIN B/D End Replace Power Board and repair parts Copyright © 2012 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 Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) → DVD Player ,Set-Top-Box, Different maker TV etc` ■ Menu→Setup →Booster ☞ A7 Check RF Cable Connection 1. Reconnection 2. Install Booster Normal Picture? Y Check S/W Version N N 3/13 . By using Digital signal level meter .
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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 2011. 01 .24 3/13 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 ☞A8 A. Video error Established date Color error Revised date 2010. 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 2010. 12 .
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Standard Repair Process LCD TV Error symptom B. Power error Established date No power Revised date ☞A17 Check Power LED . Stand-By: Red . Operating: white 2010. 12 .14 6/13 ☞A19 DC Power on by pressing Power Key On Remote control Y Power LED On? N Normal N operation? Check Power On ‘”High” OK? Y Replace Power B/D N Y Check Power cord was inserted properly Replace Main B/D ☞A4 Measure voltage of each output of Power B/D N Normal? Y Close Y ※ 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 2010. 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 2010. 12 .14 8/13 ☞A25 N Off Check audio B+ 24V of Power Board Normal voltage Y Cancel OFF Check Speaker disconnection Y N Replace Power Board and repair parts N Disconnection Replace MAIN Board End Y Replace Speaker Copyright © 2012 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 2010. 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 2010. 12 .14 10/13 1. Remote control(R/C) operating error ☞A27 Check R/C itself Operation ☞A27 Check & Repair Cable connection Connector solder Y Normal operating? N Normal operating? Y Check R/C Operating When turn off light in room Check & Replace Baterry of R/C If R/C operate, Explain the customer cause is interference from light in room.
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Standard Repair Process LCD TV Check input signal Established date D. Function error Error symptom External device recognition error Y Signal input? N Check and fix external device/cable Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes Check technical information - Fix information - S/W Version Technical information? 2010. 12 .
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Standard Repair Process LCD TV Identify nose type Error symptom Circuit noise Mechanical noise E. Noise Established date Circuit noise, mechanical noise Revised date Check location of noise 12/13 Replace PSU(with LED driver) OR Replace LED driver Check location of noise ※ Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage.
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Standard Repair Process LCD TV F. Exterior defect Error symptom Zoom part with exterior damage Exterior defect Module damage Replace module Established date Revised date 2010. 12 .14 13/13 Adjust VCOM ☞A28 Cabinet damage Remote controller damage Stand dent Copyright © 2012 LG Electronics. Inc. All rights reserved.
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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 5V A18 Checking method when power is ON A19 POWER BOARD voltage measuring method A4 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 Detail Technical Manual LCD TV Error symptom A. Video error_No video/Normal audio Content Check White Balance value Established date Revised date 2010. 12 .14 A4 Entry method method Entry 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. 7. 3. 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 2010. 12 .14 A5 Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) Edge LED SMAW200-H24S (YEONHO) 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3.5V 10 3.5V 11 3.5V 12 3.5V 13 GND 14 GND 15 GND 16 GND 17 12V 18 Inverter On/off 19 12V 20 Lamp : A-Dim LED : N.
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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 2010. 12 .14 A6 MENU -Æ Set up Æ support -Æ signal test -Æ select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2012 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual Error symptom LCD TV A. Video error_Video error, video lag/stop LCD-TV Version checking method Content Established date Revised date 2010. 12 .14 A7 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment Copyright © 2012 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 2010. 12 .14 A8 As the part connecting to the external input, check the screen condition by signal Copyright © 2012 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 2010. 12 .14 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 © 2012 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 2010. 12 .14 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 © 2012 LG Electronics. Inc. All rights reserved.
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Appendix : Exchange T-Con Board (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 CNTBroken Broken T-Con Defect, Abnormal Power Section Solder defect, Short/Crack Copyright © 2012 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 © 2012 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 © 2012 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 2010. 12 .14 A17 Front LED control : Menu Æ Option Æ Power Indicator Æ Standby light ON ST-BY condition: Red Power ON condition: white Copyright © 2012 LG Electronics. Inc. All rights reserved.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom Content Established date Revised date B. Power error _No power Check power input voltage and ST-BY 5V 2010. 12 .14 A18 For ’10 models, there is no voltage out for st-by purpose. When st-by, only 3.5V is normally on. Check the DC 20V/24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) Edge LED Edge LED SMAW200-H24S (YEONHO) 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3.5V 10 3.5V 11 3.5V 12 3.
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Standard Repair Process Detail Technical Manual LCD TV Error symptom Content Established date Revised date B. Power error _No power Checking method when power is ON 2010. 12 .14 A19 Check “power on” pin is high 24 Pin (Power Board ↔ Main Board) SMAW200-H24S (YEONHO) Edge LED Edge LED 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3.5V 10 3.5V 11 3.5V 12 3.5V 13 GND 14 GND 15 GND 16 GND 17 12V 18 Inverter On/off 19 12V 20 Lamp : A-Dim LED : N.
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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 2010. 12 .14 A22 Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Copyright © 2012 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 2010. 12 .14 A24 Checking method 1. Press the MENU button on the remote controller 2. Select the AUDIO function of the Menu 3. Select TV Speaker from Off to On Copyright © 2012 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 2010. 12 .14 A25 24 Pin (Power Board ↔ Main Board) SMAW200-H24S (YEONHO) ② 1 ② Power on 2 20V (24V) 3 20V (24V) 4 20V (24V) 5 GND 6 GND 7 GND 8 GND 9 3.5V 10 3.5V 11 3.5V 12 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 2010. 12 .14 A27 ③ ④ ② 1 2 3 4 5 6 7 8 9 10 P4102 SCL SDA GND KEY1 KEY2 St 3.5V GND RED_LED IR GND ① Checking order 1, 2. Check IR cable condition between IR & Main board. 3. Check the st-by 3.3V on the terminal 6. 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 2010. 12 .14 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.