LG Electronics 345T, 42LM3450, 42LM3450/345S/345T-ZA, 42LM345S, 42LM345T-ZA First of all, Check whether all of cables between board is inserted properly or not.

Normal

audio

Move to No

video/No audio

No video

Normal audio Check Back Light

On with naked eye On Y

Check Power

Board

12v,3.5v etc.

Normal

voltage

Replace T-con

Board or module

Repair Power

Board or parts

Check Power Board 24v output

Normal

voltage YReplace Inverter

or module

Repair Power

Board or parts

End

Always check & record S/W Version and White

Balance value before replacing the Main Board Replace Main Board Re-enter White Balance valu e

※Precaution

Established

date

Standard Repair Process

Revis ed date 1/14

LCD TV Error

symptom A. Video error

No video/ Normal audio

☞A4☞A1

☞A2

☞A6 & A3

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,,,)

2012. 01 .14

Only for training and service purposes

LGE 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 : 42LM3450 Applied Model :42LM345T TDSN TDSN- G301D G301D Except of LS350T/CS460T Applied Model : 42LM345S TDSQ TDSQ- G001D G001D Except of LS350S/CS460S EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 22 LOCAL DIMMING Addr:10101-- I2C MODEL OPTION T25 T24 FHD HD MODEL_OPT_4 MODEL_OPT_0 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. IR/LED and control for normal models. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP4_S7LR2 10/08/13 USB_OCP_DIODE 7 IC1450 AP2191DSG USB (SIDE) USB2_DIODESUSB1_DIODES FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS HDMI_2 2011.10.04 GP4L_S7LR2 HDMI 8 HDMI HDMI_1 For BDP In-Packing Model - EMI Gasket Touch Jack FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS RGB-PC / SPDIF SPDIF OPTIC JACK PC AUDIO FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS RS232C_PHONE RS-232C COMMERCIAL MODEL OPTION COMMERCIAL/NonOS MODEL OPTION For Comsumer model, use 4PIN Wafer. ONLY 32LS3500 US MODEL(H:10mm)(H:7mm) 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 2011/10/04 HEADPHONE 15 Headphone *Option : HEAD_PHONE 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 2011/12/23 TUNER_EU 26 +2.5V_TU 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 SCART / COMPONENT&COMPSIT FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2011/11/16 AMP_STA380BWE 34 IC3400 STA380BW AUDIO AMP(STA380BWE) 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

LG Electronics First of all, Check whether all of cables between board is inserted properly or not.

Models: 345T 42LM3450 42LM3450/345S/345T-ZA 42LM345S 42LM345T-ZA

date

Revis ed date 1/14

symptom A. Video error

No video/ Normal audio

☞A4☞A1

☞A2

☞A6 & A3

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,,,)