LG Electronics 50PT490B-SD manuals
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Very often issues with LG Electronics 50PT490B-SD begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Flat Panel Television LG Electronics 50PT490B-SD is responsible for and what options to choose for expected result.
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LG Electronics 50PT490B-SD Service Manual
70 pages 6.25 Mb
PLASMA TV SERVICE MANUALCAUTIONBEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : PB11K MODEL : 50PT490B MODEL : 50PT490B 50PT490B-SDInternal Use Only 2 CONTENTS3 SAFETY PRECAUTIONSAC Volt-meter General GuidanceLeakage Current Cold Check(Antenna Cold Check) Leakage Current Hot Check Leakage Current Hot Check circuit 1.5 Kohm/10W IMPORTANT SAFETY NOTICE 4 SPECIFICATION6 ADJUSTMENT INSTRUCTION1. Application Range 2. Specification 3. Adjustment items3-1. PCB Assembly adjustment 3-2. Set Assembly Adjustment 4. PCB Assembly Adjustment 7 5. Factory Adjustment11 6. Test of RS-232C control.7. Selection of Country option. 8. GND and ESD Testing8-1. Prepare GND and ESD Testing. 8-2. Operate GND and ESD auto-test. 8-3. Check Items. 9. POWER PCB Assy Voltage Adjustment(Va/Vs Voltage Adjustment) 9-1. Adjustment method 10. Default Service option.10-1. ADC-Set 10-2. White balance. Value. 10-3. Temperature Threshold 12 11. Touch Pen Operating check (Pen touch model only)12. USB DOWNLOAD (*.epk file download) 14 EXPLODED VIEW15 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC103 MX25L8005M2I-15G $0.199 512KBIT = $0.35 I2C : A0 1M BIT EEPROM S7R 8K BIT HDCP EEPROMIC109 M24M01-HRMN6TP ST_NVRAM_512K S7 IC Configuration 2G BIT NAND Flash 8M BIT serial FlashSerial FLASH MEMORY for BOOT S7R_NORMAL S7R-Multi(Brazil) FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2 14Close to IC as close as possible N/A COMPONENT 1/2 TV/MNT*Active High reset N/A AUDIO OUT 16 FRC PARTDSUB CVBSAUDIO IN MUST BE LINE IMPEADANCE 100 OHM !! S7 RESET CIRCUIT LVDS OUT HDMIClose to MSTAR MODEL OPTION3 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Vout=0.8*(1+R1/R2)EAX63425901(5) POWER 5 13 AC_DET L510 RL_ON BC R506 100 IN 1 3OUT +2.5V_AVDD 5V_ON VIN 3 2VOUT C564 +5V_ST C509 C508+3.3V_AVDD IC506 AZ1085S-3.3TR/E1 C573 C512 C567 C580 +3.3V_AVDD C562 IC505 MIC39100 0IPRPML001A 2GND C521 C514 IC500 AP2121N-3.3TRE1 EAN58801701 1 GND C530 READY C505 R507 100 R502 10K READY Q500 MMBT3904(NXP) E C502 10V ERROR_DET +5V_ST 17V Q501 RTR030P02 S D GR513 100 RL_ON C519 C501 C513 L501 +3.3V_ST C522 50V 18 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) POWER Wafer 18P2A 3.2A / P-CHANNEL R1 Vout=0.827*(1+R1/R2) Vout=0.8*(1+R1/R2) 17V => +5V +5V --> +3.3V +5V_ST_EN --> +3.3V_AVDDFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC602 MN884433BRAZIL DEMODULATOR +3.3V_DE 6 14 19 BRAZIL DEMODULATORTHERMAL FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS STA368BWG IC70017V [EP]GND 1GND_SUB 6OUT2B 3TEST_MODE 17 OUT3B/FFX3B 16 CONFIG 15 VDD 14 GND_REG 13 OUT1A 12 GND1 11 VCC1 10 OUT1B 9OUT2A 8VCC2 7GND2 4VSS 5VCC_REG 2SA 21 VDD_DIG_1 20 TWARN/OUT4A 19 EAPD/OUT4B 18 OUT3A/FFX3A 23 PWRDN 24 VDD_PLL 25 FILTER_PLL 22 GND_DIG_1 37 P700 SMAW250-H04R 7 14 AUDIO AMP 20 ST Audio AMP2010.10.21 Copyright 2011 LG Electronics Inc. All rights reserved. 21 SIDE HDMI(SMD TYPE)HDMI 1 HDMI 22010.10.21 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 22 PC AUDIOUSA IR JACKRGB/RS232/PC/USA IR 9 14 For RGB Debugging RS232CEMI_GND2 D900 RGB_DDC_SDA EAG60841801EMI_GND4 RGB_DDC_SCL EMI_GND1 GND EMI_GND3 DSUB_B- IC901 AT24C02BN-SH-T DSUB_HSYNC DSUB_VSYNC RGB_DDC_SCL GND C914 0.1uF 16V D906 14 13 12 11 10 9 8 7 6 DSUB_G- DSUB_R- R911 D907 D905 R917 1K D909 30V READY JK901IR JACK10K D904 D908 RGB_DDC_SDA DSUB_B PC_SER_CLK PC_SER_DATA P900 SPG09-DB-010 1 2 3 4 5 16 DSUB_R DSUB_G C922 0.1uF D901 ROM DOWNLOAD FOR PDP SUB Board I/F RGBSCREW GND SeperateSUB IR IR Wafer/ SIDE_HDMI/USB GASKET GND FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 23 SPDIFCOMP1_DET HIGH AV_CVBS CVBS/COM1/2 JACK 10 145H [RD1]O-SPRING_2 4H [RD1]CONTACT_2 5G [WH1]O-SPRING 4F [RD1]CONTACT_1 5F [RD1]O-SPRING_1 7F [RD1]E-LUG-S 5E [BL1]O-SPRING 7E [BL1]E-LUG-S 4D [GN1]CONTACT 5D [GN1]O-SPRING 6D [GN1]E-LUG 6N [RD2]E-LUG 5N [RD2]O-SPRING_2 4N [RD2]CONTACT 5M [WH2]O-SPRING 5L [RD2]O-SPRING_1 7L [RD2]E-LUG-S 5K [BL2]O-SPRING 7K [BL2]E-LUG-S 4J [GN2]CONTACT JK1000 PPJ239-01 5J [GN2]O-SPRING 6J [GN2]E-LUG 6H [RD1]E-LUGSIDE_LIN SIDE_CVBS_IN SIDE_CVBS_DET AV_CVBS_DET RESULT SIDE CVBS 24 USB2 REAR(SVC)USB1 SIDE2010.10.2125 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS CLose to Saturn7M IC H5TQ1G63BFR-H9C EAX63425902(5) DDR 12 14IC1201 +1.5V_DDR_IN H5TQ1G63BFR-H9C IC1202DDR3 1.5V By CAP - Place these Caps near Memory Close to DDR Power Pin CLose to Saturn7M IC CLose to DDR3 DDR3 1.5V By CAP - Place these Caps near Memory Close to DDR Power Pin CLose to DDR3 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ISDB_IF_AGC KOREA/BRAZIL CAN TUNER TU1300 TDTR-T036F7SDAT 16 IF/AGC 8NC_3 9SIF 4NC_1[RF_AGC] 10 NC_4 11 VIDEO 12 GND 13 +B2[1.2V] 14 +B3[3.3V] BR_TUNER 5NC_2 2BST_CTL 1RF_S/W_CTL 3+B1[5V] 6SCLT 15 RESET 18 DIF_2[P] 19 SHIELD 13 14 26 < KOREA / BRAZIL TUNER > LG8300 Close to LG8300 Close to DDR2(IC1401) 14 Vout=0.8*(1+R1/R2) 5.0V TO 3.3V 3.3V TO 1.8V 2010.10.21EAX63425902(5)P1402 P1401 +1.8V_ON IC1401 W9725G6JB-25 IC1400IC1406 AZ1085S-3.3TR/E1 P1403 12507WS-04L 27 IC1400 LG8300LGE8300 DDR2 256MBIT104060-8017 FHD 3DF EJTAG 5V TO 1.0V 2D BYPASS RF EMITTER (STRAIGHT) IR EMITTER (STRAIGHT) 2MBIT(256K X 8Bit) serial Flash +3.3V3D TO +3.3V_3D_A 30 Block Diagram Overview()33 Power Up Sequence
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