LG Electronics 29LN45**-Z* 2. No Picture, 3. No Video

Only for training and service purposes

2. No Picture

Module

Back Light On ?

Check WLED_ENABLE high

R131

Check IC101

Replace Main Scaler IC

N N

Check Panel clock

P601(#9,10)

Check IC101

Repair Main B/D

Check Panel power

P601(#27,28,29,30) 12V

IC804Output 12V

Replace IC804

Replace T-con

Board or module

Check FFC Cable for damage

or open conductors. Replace Cable

Check LED Driver output

(LED Driver B’d P1100 #1)

Check LED Driver IC1100

Replace LED Driver IC

3. No Video - Digital TV

(1) 29LN45U / 29LN45R

Check RF Cable

Check Tuner(TU2602)

Data, CLK, SYN, VAL

Replace Tuner(TU2602)

Recheck

1. Check Tuner(TU2602 #5) Power (3.3V)

2. Check IC803 Output voltage(3.3V)

Replace IC803

Check Tuner(TU2602) I2C Signal

SCL(R2609), SDA(R2610)

Check IC101

1. Check Tuner(TU2602 #7) Power (1.8V)

2. Check IC805 Output voltage(1.8V)

Replace IC805

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. Timing 5.1. RGB/HDMI (PC) 5.2. HDMI (DTV) 5.3. Component ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Main PCB check process * Boot le Download 3.1. EDID Process 3.1.1. EDID download 3.1.2. RGB EDID Data 3.1.3. HDMI EDID Data 3.2. Function Check 4. Total Assembly line process 4.1. Tool option & ADC Check 4.2. Model name & Serial number download 4.2.1. Model name & Serial number D/L 4.2.2. Method & notice 4.3. Function Check 4.3.1. Check display and sound 4.3.2. PCMCIA CARD Check 4.3.3. PIP Check 4.3.4 HDMI MHL Function Inspection(HDMI2 Port only) 4.5. DPM Operation check 4.6. Model name & SW version & Adjust check 4.6.1. Model Name& SW Version Check 4.6.2. Adjust Check 4.7. Outgoing condition Configuration TROUBLE SHOOTING 1. No Power 2. No Picture 3. No Video - Digital TV (1) 29LN45*U / 29LN45*R (2) 29LN45*3/29LN45*B (3) 29LN45*5 4. No Video - Component 5. No Video - RGB 6. No Video - HDMI 7. No Audio BLOCK DIAGRAM LGE2121-MS10 Option(Only for DVB) - ATSC: TDSS-H501F (Half NIM) Option EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS AR101 2013.1.14 1 13 I2C MODEL OPTION FHD MODEL_OPT_0 DVB_T2 HD NON_DVB_S TP for EU_T/C TP_EU 3 12 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS INTERFACE 4 13 PC AUDIO(SIDE) USB(SIDE) Jack Shield (HDMI1,RGB) HDMI For CEC HDMI_2 With MHL MHL OCP MODULE&CONTROL IR/LED and Control IR_OUT(Ready) Module EAX65283603 2013.1.1429LN4500 Headphone block EAX65283603 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS R842 M1 Core H/W Option:FULL_NIM 19V TO 5V DCDC CONVERTER 2G 1600(BRAZIL - GINGA) K4B1G1646G-BCK0 1G 1600 DDR_256 12 13 S7LR-M_NON_MS10 * Option name of this page : CI_SLOT CI HOST I/F CI TS INPUT CI SLOT 121022 Swich block change FET->IC GLOBAL tuner block except T2/S2 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS SCART JACK SCART&COMP 28 13 JK2801 PSC008-01 SCART / COMPONENT&CVBS SCART AMP FULL SCART COMPONENT&CVBS LED DRIVER 29 13 TOTAL LED DRIVER BLOCK FIRST BOOST UP REDUCE INDUCTOR TEMP ISSUE VOUT = VREF*(1+51K/680) = 0.7 *(1+51K/680) = 53.2V VOUT#1=53.2V