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LG Electronics 50PT490B, 50PT490B-SA, 50PT490B-SD 10. Digital TV Audio Trouble Shooting

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Download 70 pages, 6.25 Mb

Only for training and service purposes LGE Internal Use Only

10. Digital TV Audio Trouble Shooting

Check video output

Follow procedure All source audio

trouble shooting Maybe Mster S7 internal audio DSP

has problems. Replace It

Follow procedure digital TV video

trouble shooting

Contents

Main PLASMA TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : PB11K MODEL : 50PT490B MODEL : 50PT490B 50PT490B-SD CONTENTS - 3 - SAFETY PRECAUTIONS AC Volt-meter General Guidance Leakage Current Cold Check(Antenna Cold Check) Leakage Current Hot Check SPECIFICATION 1. Application Range 2. Specification 3. Test Method 4. General Specification ADJUSTMENT INSTRUCTION 1. Application Range 2. Specification 3. Adjustment items 3-1. PCB Assembly adjustment 5. Factory Adjustment 5-1. Auto Adjust Component 480i/1080p RGB 1080p 5-2. Use Internal ADC(S7R) 5-3. EDID(The Extended Display Identification Data) / DDC(Display Data Channel) download 5-4. Auto Download 5-5. Manual Download 5-6. Adjustment Color Temperature (White balance) Page 6. Test of RS-232C control. 7. Selection of Country option. 8. GND and ESD Testing 8-1. Prepare GND and ESD Testing. 8-2. Operate GND and ESD auto-test. 11. Touch Pen Operating check (Pen touch model only) 12. USB DOWNLOAD (*.epk file download) Page - 14 - EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC103 MX25L8005M2I-15G $0.199 512KBIT = $0.35 I2C : A0 FRC PART DSUB CVBS AUDIO IN MUST BE LINE IMPEADANCE 100 OHM !! +1.26V_MIU0VDDC +1.26V_MIU1VDDC Main IC Power 3 13 +1.26V_MIU0VDDC FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS C515 3A R2 S7 core 2.5V Multi Power(+3.3V_AVDD -->2.5V_AVDD) Stand-by (5V_ST --> +3.3V ST) +5V_ST_EN --> +1.5V_DDR_IN +5V_ST_EN --> +1.26V_VDDC P_CH FET(+5V_ST_EN Source) 1.8A BRAZIL DEMODULATOR THERMAL FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS STA368BWG IC700 ST Audio AMP 2010.10.21 Copyright 2011 LG Electronics Inc. All rights reserved. 8 14 HDMI SIDE HDMI(SMD TYPE) 10mm HDMI 1 HDMI 2 2010.10.21 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS PC AUDIO $0.179 USA IR JACK RGB/RS232/PC/USA IR 9 14 SPDIF COMP1_DET HIGH AV_CVBS CVBS/COM1/2 JACK 10 14 USB2 REAR(SVC) 11 14 USB1 SIDE 2010.10.21 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS CLose to Saturn7M IC H5TQ1G63BFR-H9C EAX63425902(5) DDR < KOREA / BRAZIL TUNER > LG8300 Close to LG8300 Close to DDR2(IC1401) LG8300_RESET 14 IC1400 LG8300 TF05-51S HD LGE8300 DDR2 256MBIT 104060-8017 FHD 3DF Page Page Block Diagram Overview() S7L Rear USB( SVC only) Side USB Page Power Up Sequence Power Up Timing Requirements Page S7 Power Sequence GP2-R I2C MAP CH 6 CH 12 CH 7 CH 2 GPIO Structure GP2-R Power flow Trouble Shooting Guide for LG Service Man Page Page Page 2. No OSD Trouble Shooting No OSD Trouble Shooting (Module Power Sequence) Normal Display Vcc (5V) Va Vs DISPEN Module Control Trouble Shooting Master : Image Board Slave : PDP Module Page 3. Digital TV Video Trouble Shooting Page 4. Analog TV Video Trouble Shooting Page 5. Component Video Trouble Shooting Page 6. RGB Video Trouble Shooting Page 7. AV Video Trouble Shooting Page 8. HDMI Video Trouble Shooting Page 9. All Source Audio Trouble Shooting Page 10. Digital TV Audio Trouble Shooting Page 11. Analog TV Audio Trouble Shooting Page 12. Component / RGB / AV Audio Trouble Shooting Page 13. HDMI Audio Trouble Shooting Page 14. USB Trouble Shooting