LG Electronics 42LT760H-ZA manuals
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Even oftener it is hard to remember what does each function in Flat Panel Television LG Electronics 42LT760H-ZA is responsible for and what options to choose for expected result.
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LG Electronics 42LT760H-ZA Service Manual
55 pages 7.12 Mb
2 CONTENTS3 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 SPECIFICATION9 ADJUSTMENT INSTRUCTION1. Application Range 2. Designation 3. MAIN PCBA Adjustments3.1. ADC Calibration3.1.1. Overview 3.1.2. Equipment & Condition 3.1.3. Adjustment method 3.2. MAC address D/L, CI+ D/L3.2.1. Equipment & Condition 3.2.2. Communication Port connection 3.2.3. Download process 3.2.4. Communication Port connection 3.2.5. Download 3.2.6. Inspection 10 3.3. LAN Inspection3.3.1. Equipment & Condition SET PC3.3.2. LAN inspection solution 3.4. LAN PORT INSPECTION(PING TEST)3.4.1. Equipment setting 3.4.2. LAN PORT inspection(PING TEST) 3.5. Model name & Serial number Download3.5.1. Model name & Serial number D/L 3.5.2. Method & notice 3.6. CI+ Key checking method3.6.1. Check the method of CI+ Key value 3.6.2. Check the method of CI+ key value(RS232) 3.7. WIFI MAC ADDRESS CHECK 11 4. Manual Adjustment4.1. EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download4.1.1. Overview 4.1.2. Equipment 4.1.3. Download method 4.1.4. EDID DATA 12 4.2. White Balance Adjustment4.2.1. Overview 4.2.2. Equipment 4.2.3. Equipment connection MAP 4.2.4. Adj. Command (Protocol) 4.2.5. Adjustment method 4.2.6. Reference (White balance Adj. coordinate and color temperature) 13 4.3. Tool Option selection4.4. Wi-Fi Test 4.5. HDMI ARC Function Inspection4.5.1. Test equipment 4.5.2. Test method 14 5. Check Commercial features5.1. External SPK Out5.1.1. Equipment & Condition 5.1.2. Check the speaker out 5.2. IR Out and DC Power Outlet (12V) 15 6. AUDIO output check6.1. Audio input condition 6.2. Specification 7. GND and HI-POT Test7.1. GND & HI-POT auto-check preparation 7.2. GND & HI-POT auto-check 7.3. Checkpoint 16 8. USB S/W Download(Service only)9. Optional adjustments9.1. Manual ADC Calibration9.1.1. Equipment & Condition 9.1.2 Adjust method 9.2. Manual White balance Adjustment9.2.1. Adj. condition and cautionary items 9.2.2. Equipment 9.2.3. Adjustment 17 TROUBLESHOOTING GUIDEBLOCK DIAGRAMDVB T/C R L I2S Out Wi-Fi 51 P (FHD) 26 SideRearLVDSH/N TU Demod 30P(HD) Full Scart Speaker RearExt. Speaker RGB PC To MICOM 27 EXPLODED VIEWIC104 M24M01-HRMN6TP 8 MID_MAIN_1 NVRAM Model OptionClose to eMMC Flash (IC8100) I2C X-TAL JTAG 28 HDCP EEPROMCrystal Matching Test result : 27pF -> 20pF -> 24pF EAX6430790* : LD22* / LC22* EAX6443420* : LT22* / LJ22* / LA22* / LB22*FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 29 PLACE AT JACK SIDEC333 / C334 / C335 MTK Recommend : 10 pF CH5 CH4 CH2 CH1 CHANGE SYMBOL CH3 CH6USB Port was changed !!!! PLACE AT JACK SIDETo NEC & HDMI 30 10MID_MAIN_3 DECAP FOR SOC (HIDDEN - UCC) 31 PLACE AT MAIN SOC SIDE2011.11.21 11 MID_MAIN_SCART PLACE AT JACK SIDE PLACE AT IC860232 IC703IC701 IC704 IC702 DDR ONE SIDE 12 2011.09.06 33 132011.09.26 MID_MAIN_CI CI TS INPUT Close to MT5369 Close to MT5369 CI TS OUTPUT Close to MT5369 CI DETECT FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Vout=(0.763+0.0017*Vout.set)*(1+R1/R2) Vout=0.8*(1+R1/R2) 3A$ 0.145 12V-->3.58V 24V-->3.48V 3AVout=0.827*(1+R1/R2)=1.521V 34 On-semi+3.3V_NORMAL DDR MAIN 1.5V#16/#20/#23 LD - GND OR USE LE(N.L.D.) - OPEN LE(L.D.) - USE FROM LIPS & POWER B/D PANEL_POWER Power_DET +5V_Normal FOR LPB Download[To LED DRIVER] FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS +3.5V_STR3300 MTK Recommend : 0 Ohm UI : HDMI2 UI : HDMI3 UI : HDMI1 For CECFrom HDMI Connector To NEC LMTK_HPD B1 - A HPD_CTL CONNECTION HB0 - A 35 HPD SWITCHNEC_HPD FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS RGB PC2011.09.29 JACK HIGH / MID 36 SPDIF OUT37 RS232CHInteractive L Debug MTK CONNECTION 2011.09.29 JACK_COMMON 38UART_SW2 L B0 - A CONNECTION B1 - A USB Download EXT UART SWITCH EXT_SPK_CONTROL & DBG OUT UART DBG SWITCHB0 - A EXT.SPK VOL Control B1 - A B0 - A DEBUG_NEC/MTK Debug NEC CONNECTION B1 - A DBG_SW NVRAM I2C SWITCHB0 - A NVRAM - NEC LCONNECTION NVRAM - MTK UART_SW2 B1 - A DBG_SW B1 - AH B0 - A MTK ADJL CONNECTION MTK DEBUG 38 IR & KEYZener Diode is close to wafer2011.09.26 IR / KEY 41 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Vout=(0.763+0.0017*Vout.set)*(1+R1/R2)=4.98V 39 USB_WIFIDVR Ready MAX 1.8A MAX 0.4A DVR Ready USB2 USB1 +5V_USB FOR USB USB To SERIAL I/FFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS PSC008-01 SCART GENDER 2011.10.26 46 40 Full ScartAR4800 100 1/16W M_REMOTE 41 ZigBee_Radio Pulse M_REMOTE OPTIONALL M_REMOTE OPTION48 MOTION REMOTE xxLT760H-ZA FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 42 IC5400 NTP-7500L0x54CI POWER ENABLE CONTROL CI SLOT 2011.10.31 62 43 Option FOR MTK Option FOR LG1152+3.3V_NORMAL 65IF_AGC close to Tuner Close to the tuner 2011.08.11 TUNER+1.8V_TU IF_N IF_P +1.8V_TU close to TUNER2. No via on both of them Signal to Signal Width = 12mils 1. should be guarded by ground 3. Signal Width >= 12mils Ground Width >= 24mils close to Tuner should be guarded by groumd 44 H/NIM for Commercial (EU)Max 240mA [51Pin LVDS OUTPUT Connector] 45 LVDS2011.08.11 LVDS_HIGH_MID 71 [30Pin LVDS OUTPUT Connector] 33 1/16W LOCAL_DIM2011.04.30 LOCAL DIMMING 76 46 LOCAL DIMMING[To LED DRIVER] FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS SAMSUNG_EMMC_2GB SANDISK_EMMC_4GB DEV_HYNIX_EMMC_4GB HYNIX_EMMC_2GBIC8100-*3 H26M31001EFR IC8100 SDIN5D2-4G-974L1 IC8100-*2 KLM2G1HE3F-B001 11.09.29 81 eMMC 47 eMMC I/FDont Connect Power At VDDI(Just Interal LDO Capacitor) 48 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS To PHY CONFIG FOR MAC4 MTK TO RTL matching PHY TO RTL matchingIC8400 MP20045DQ-LF-Z ETNHUB_AVDD18 IC8401 RTL8306G STRAPPING PIN CONFIG RTL SOC FOR DEBUG WOLMide : 11111 Place Closed IC8601 TPA6011A4PWPRG4IC8602 AS324MTR-E1 CLOSE TO MTK 400mA 86EXT_SPK 49 EXT_SPK AMPEXT_SPK OUT EXT_SPK OP AMPFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS MICOM MODEL OPTION IC8704 SC632ULTRT 87PTC IC8700 NEC_MICOM ST_5V 50 REAL TIME CLOCK(RTC)SMD GASKET 7.5T SMD GASKET 5.0T SMD GASKET 5.5T SMD GASKET 6.5T SMD GASKET 8.5T SMD GASKET 4.5T 51 SMD GASKETSMD GASKET 9.5T2011.02.09xxLT760H-UA 88SMD GASKET FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS EMI BETTER LED_LAN_NEW EMI PASSNON_LED_LAN IC9000 RTL8201FN LAN2 Detect 52 Ethernet BlockEthernet PHYTO Ethernet HuB TO SOC/ MCU TO MCU MCU PORT TO BE ASSIGNED!! RJ 45 LAN 2PHY ADDRESS CONFIG 2 10 CONFIG PHY_ADDRESS = 111TO RJ45 TO Ethernet HuB Place Closed PHY chip for WOLConnected Not Connected High Low LAN 1 EXT AUX RJ452011.08.26xxLT760H-UA 90 Place close at RTL8201FN(IC9000) side LAN1_DET GXFULL A37 Input StatusMTK pin no LAN1_DET LAN2_DET LAN_LINK3 Status Input MTK pin no Connected EMI FAIL IC9102 EXTERNAL_POWER DETECTIONIC9103 TPS54327DDAR 2011.02.09xxLT760H-UA 915V/12V Power Out 53 EXTERNAL_POWER OUT 5V/12V$0.21 Vout=(1+R1/R2)*0.765=5.03VFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 27MHz(200ppm)Cap close to IC 92Pro:Idiom To SOC I2C : 0x47 RESET61 25 34 INPUT 1ADJ/GND 3 IC9201 AZ1117H-1.8TRE1(EH13A) 2 OUTPUT IC9202 LGDT1001LG1001 Use XMARK LGDT1129 Not use XMARK Power 54 Pro:Idiom (XMARK)
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