LG Electronics 42LN548C/549C manuals
TV and Video > Flat Panel Television
When we buy new device such as LG Electronics 42LN548C/549C we often through away most of the documentation but the warranty.
Very often issues with LG Electronics 42LN548C/549C 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 42LN548C/549C is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Flat Panel Television on our side using links below.
LG Electronics 42LN548C/549C Service Manual
38 pages 6.48 Mb
3 SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICEGeneral GuidanceBefore returning the receiver to the customer, Leakage Current Cold Check(Antenna Cold Check) Leakage Current Hot Check (See below Figure) Leakage Current Hot Check circuit 4 SERVICING PRECAUTIONS6 SPECIFICATION10 ADJUSTMENT INSTRUCTION1. Application Range 2. Designation 3. Main PCB check process* Boot file Download * USB DOWNLOAD* After downloading, have to adjust Tool Option again. 11 3.1. ADC Process3.2. EDID Download 3.3. EDID data 3.4 Function Check 12 4. Total Assembly line process4.1. White Balance adjustment* Auto-control interface and directions * Manual W/B process using adjust Remote control. 4.5. Outgoing condition Configuration 13 5. GND and HI-POT Test5.1. HI-POT auto-check preparation 5.2. HI-POT auto-check 5.3. Checkpoint 6. Model name & Serial number D/L6.1. Signal Table 6.2. Command Set 6.3. Method & notice 14 7. CI+ key downloadGP4_LOW 7.1. Communication Prot connection 7.2. CI+ Key Download 15 8. Check Commercial Features.8.1. External speaker(8OHM, 1W, Single-End) 8.2. IR OUT 16 TROUBLE SHOOTING GUIDE21 TunerBLOCK DIAGRAM 22 EXPLODED VIEW23 LGE2112-T8 PM MODEL OPTION I2C Internal demod out EEPROM A0h FLASH/EEPROM/MAINIC101-*1 LGE2111A-T8 NVRAM_ST EAN61548301 LGE2112-T8 AR102 22 AR101IC104 M24256-BRMN6TP IC104-*1 from CI SLOTfor SYSTEM/HDCP EEPROM&URSA3 NAND FLASH MEMORY <CHIP Config> (I2S_OUT_BCK,I2S_OUT_MCK,PAD_PWM1PAD_PWM0) DIMMING <CHIP Config(LED_R/BUZZ)> Boot from SPI CS1N(EXT_FLASH) 1b0 Boot from SPI_CS0N(INT_FLASH) 1b1 for SERIAL FLASH 24 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS MAIN2H/P OUT DTV_IF DSUB SOC_RESET CVBS In/OUT DDR3 1.5VSCART1_RGB/COMP1 SIDE USB ANALOG SIF TUNER_I2C RSDS Power OPT Normal 2.5V 2HDMI MODEL_OPT_1 3D NON_OLED MODEL_OPT_3 MODEL_OPT_2 PHM_OFF MODEL_OPT_5 AB2 VDDC 1.05V Normal Power 3.3VPIN NO. NON_3D MODEL OPTION MODEL_OPT_0 NON_DVB_T2 T24 OLED LOW NON_DVB_S STby 3.5VF4 U23 PHM_ON T25 AB3 MODEL_OPT_4 PIN NAME FHD HD HIGH I2S_I/F DVB_T2 MODEL_OPT_6 MODEL_OPT_7 B8 A8 READEY EXTERNAL SPEAKER SCART OUT FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Vout=0.827*(1+R1/R2)=1.225V Vout=0.8*(1+R1/R2)=1.5319 4A POWER 4 25 +1.5V_DDR+3.3V_Normal +2.5V/+1.8V S7LR core 1.2V volt FROM LIPS & POWER B/D Power_DET+5V_Normal & +5V_USB Vout=0.8*(1+R1/R2) 26 NTP-7500LIC501FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS POWER 5 27 IR & LEDFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IR/CONTROL 6 CONTROLIR OUT FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS LVDS Change in S7LR [30Pin LVDS Connector] (For HD 60Hz_Normal) [51Pin LVDS Connector] (For FHD 60Hz) FOR FHD REVERSE(8bit) 28 LVDSMIRROR Change in S7LR FOR FHD REVERSE(10bit) 7 29 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS HDMI 8 HDMI_1 SIDE_HDMI HDMI_2 For CEC HDMI EEPROM FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 10 30 RS232C34 REAR COMPONENT PHONE JACKFull Scart 35 SPEAKER OUT JACKFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 18 EXT_SPK EXT_SPEAKER_AMPFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS CI TS INPUT CI POWER ENABLE CONTROL CI DETECT+3.3V_CI +3.3V_Normal 0.1uF C1902 CI SLOT CI HOST I/F 36 * 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 close to TUNERVo=VREF*(1+R2/R1) Vo=0.8*(1+R2/R1) TDSN-G301DTU2603-*1 TDSN-C201DIF_AGC_MAIN IC2602 TJ4220GDP-ADJ +3.3V_T2_TU +3.3V_Normal +1.8V_TU IF_P_MSTAR IF_N_MSTAR 7+1.8V 8CVBS 9IF_AGC 4SDA 10 DIF[P] 11 DIF[N] TDSS-G101D TU26035+3.3V 2RESET 1NC 3SCL 6SIF 12 SHIELD +3.3V_T2_TU TU_CHINA TU_T2/C+1.23V_TU 13_bushing_T/C ERROR & VALID PIN 37 GP4R_GLOBAL_TUNER_BLOCKClose to TUNER 26 20 12 .1 1. 122013 S7LR2 TUNER
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