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LG Electronics 37LN548C/549C, 37LN548C/549C-ZA, 37LP360H/361H-ZA service manual - page 2

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CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ........................................................................ 3

SERVICING PRECAUTIONS ................................................................... 4

SPECIFICATION ...................................................................................... 6

ADJUSTMENT INSTRUCTION ............................................................. 10

TROUBLE SHOOTING GUIDE ............................................................... 16

BLOCK DIAGRAM ................................................................................. 21

EXPLODED VIEW .................................................................................. 22

SCHEMATIC CIRCUIT DIAGRAM ..............................................................

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) 5.3. RGB Input (PC) - FHD Model 5.2. RGB Input (PC) - HD Model 5.3. HDMI Input(PC/DTV) 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. White Balance adjustment * Auto-control interface and directions * Manual W/B process using adjust Remote control. 4.5. Outgoing condition Configuration 5. GND and 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. CI+ key download GP4_LOW 7.1. Communication Prot connection 7.2. CI+ Key Download 8. Check Commercial Features. 8.1. External speaker(8OHM, 1W, Single-End) 8.2. IR OUT TROUBLE SHOOTING GUIDE 1. Check the booting Voltage 2. Digital TV Video 3. Analog TV Video 4. AV Video 6. HDMI Video 5. RGB Video 7. Audio of All iput 8. TV Audio 9. AV Audio 10. RGB Audio S7LR2 (LGE211A-T8) Tuner BLOCK DIAGRAM CI EXPLODED VIEW LGE2112-T8 22 PM MODEL OPTION I2C Internal demod out LGE2112-T8 AR102 AT24C256C-SSHL-T 22 AR101 IC104 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS DVB_S MAIN2 H/P OUT DTV_IF +1.5V_DDR +3.3V_Normal +2.5V/+1.8V S7LR core 1.2V volt FROM LIPS & POWER B/D NTP-7500L IC501 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS POWER 5 IR & LED FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IR/CONTROL 6 CONTROL LVDS MIRROR Change in S7LR FOR FHD REVERSE(10bit) 7 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS HDMI 8 HDMI_1 SIDE_HDMI HDMI_2 RS232C RS-232C FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS SPDIF OPTIC JACK 11 HEADPHONE PC AUDIO FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS CLose to DDR3 12 H5TQ1G63DFR-H9C LGE2112-T8 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 13 S_FLASH FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS PSC008-01 REAR COMPONENT PHONE JACK Full Scart SPEAKER OUT JACK FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 18 EXT_SPK IC1800 * Option name of this page : CI_SLOT CI Region (because of Hong Kong) CLOSE TO MSTAR PCMCI 19 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS TU2602 GP4R_GLOBAL_TUNER_BLOCK Close to TUNER 26 20 12 .1 1. 122013 S7LR2 TUNER