LG Electronics 42LM340S, 42LM340T, 42LM340T-ZA service manual

Printed in KoreaP/NO : MFL67360733 (1204-REV00)

CHASSIS : LD21C

MODEL : 42LM3400/340S/340T

MODEL : 42LM3400/340S/340T-ZA

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

Contents

Main Page SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE General Guidance Before returning the receiver to the customer, Leakage Current Cold Check(Antenna Cold Check) SERVICING PRECAUTIONS Page SPECIFICATION 1. Application range 2. Requirement for Test 3. Test method 4. Model General Specification Page 5. Video resolutions (2D) 5.1. Component Input (Y, CB/PB, CR/PR) 5.2. RGB Input (PC) - HD Model 5.3. RGB Input (PC) - FHD Model 5.4. HDMI Input(PC/DTV) 6. Video resolutions (3D) ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Main PCB check process * Boot file Download 3.1. ADC Process 3.2. EDID Download 3.3. EDID data 3.4 Function Check 4. Total Assembly line process 4.1. Adjustment Preparation * Auto-control interface and directions * Manual W/B process using adjust Remote control. 4.2. EYE-Q function check 4.3. 3D function test 4.4. IR emitter inspection 4.5. Outgoing condition Configuration 5. HI-POT Test 5.1. HI-POT auto-check preparation 5.2. HI-POT auto-check 5.3. Checkpoint 6. Model name & Serial number D/L 7. MAC Address & CI+ key download 7.1 MAC Address SET PC 7.1.1 Equipment & Condition 7.1.2 Download method BLOCK DIAGRAM Applied Model : **LM5800, **LS5600, **LS3500, **CS460, **LM3400 Applied Model : **LM580T, **560T, **LS350T, **CS460T, **LM340T TDSN TDSN- G301D G301D Except of LS350T/CS460T Applied Model : **LM580S, **560S, **LS350S, **CS460S, **LM340S TDSQ TDSQ- G001D G001D Except of LS350S/CS460S EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS POWER_LARGE 2012/01/13 4 IC407 AP7173-SPG-13 HF(DIODES) FROM LIPS & POWER B/D Power_DET S7LR core 1.2V volt +1.5V_DDR ERROR_OUT is used for lamp(CCFL/EEFL) models. In other words, LED models need not use. LVDS for large inch [51Pin LVDS Connector] (For FHD 60Hz) FOR FHD REVERSE(8bit) MIRROR Pol-change Shift FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS K4B1G1646G-BCH9 H5TQ1G63DFR-H9C NT5CB64M16DP-CF H5TQ1G63DFR-H9C Serial Flash for SPI boot FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS CI TS INPUT CI POWER ENABLE CONTROL CI HOST I/F * Option name of this page : CI_SLOT CI Region (because of Hong Kong) CLOSE TO MSTAR CI DETECT GP4L_S7LR2 ETHERNET ETHERNET * H/W option : ETHERNET FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2011/08/17 23 IR/LED and control for on.y 12 sub without IR-OUT. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2011/12/23 TUNER_EU 26 +2.5V_TU Vo=0.8*(1+R2/R1) GP4R_GLOBAL_TUNER_BLOCK close to TUNER ERROR & VALID PIN Close to TUNER close to TUNER DVB-S2 LNB Part Allegro PCB_GND and A_GND are connected DCDC_GND and A_GND are connected in pin#27 Input trace widths should be sized to conduct at least 3A DCDC_GND and A_GND are connected AUDIO AMP(STA380BWE) FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS AR101 22 LOCAL DIMMING *Option : HDCP_EEPROM HDCP EEPROM EEPROM FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2011.08.24 POWER,IN/OUT,H/W OPT 51 MODEL_OPT_2 MODEL_OPT_3 USB (SIDE) USB1_DIODES FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS HDMI_2EA(NON SIDE HDMI) 2011/08/12 53 HDMI_2EA(NON SIDE HDMI) HDMI_2 HDMI_1 For CEC FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Full Scart COMPONENT SCART AUDIO OUT RS-232C 4PIN MSTART DEBUG_4PIN Page Contents of LCD TV Standard Repair Process First of all, Check whether there is SVC Bulletin in GCSC System for these model. Contents of LCD TV Standard Repair Process Detail Technical Manual Continue to the next page date Revis ed date 1/14 symptom A. Video error No video/ Normal audio First of all, Check whether all of cables between board is inserted properly or not. (Main B/DPower B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) A4 A5 A6 A5 A6 Color error A7 A8/ A9 A10 date Revis ed date 5/14 symptom 2012. 01 .14 Vertical/Horizontal bar, residual image, light spot Vertica l / Horizontal bar, residual image, light spot, external device color error A10 External device screen error-Color error device and cable B. Power error Off when on, off while viewing, power auto on/off A13 A14 date Revis ed date 8/14 C. Audio error A15 A16 abnormal audio/di scontinuation/noise is same after Check input signal compared to No audio C. Audio error A16 Wrecked audio/ discontinuation/noise date Revis ed date 10/14 D. Function error 1. Remote control(R/C) operating error A4 D. Function error E. Noise F. Exterior defect