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LTW32AC/CF/DF-SERVICE NANUAl SERVlE 21. PRECAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Important Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Leakage Current Hot Check . . . . . . . . . . . . . . . . . . . . . . . 32. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43. Location & Function of Control . . . . . . . . . . . . . . . . . . . . . . . . 54. Remote Control Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75. ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86. Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91) IC501 : SVP-EX52(Trident) . . . . . . . . . . . . . . . . . . . . . . 92) IC001 : M30620 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203) IC002 : EN29LV040A . . . . . . . . . . . . . . . . . . . . . . . . . . . 224) IC01 : TEA6425 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245) IC09 : MSP3420G . . . . . . . . . . . . . . . . . . . . . . . . . . . 256) IC402 : NJM2235 (Only LTW32AC) . . . . . . . . . . 277) IC661, IC662 : MP7720 . . . . . . . . . . . . . . . . . . . . . . . 288) IC982 : MST9883 . . . . . . . . . . . . . . . . . . . . . . . . . . . 309) IC663 : TDA1517 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3110) IC511 : HY5DU283222AQP . . . . . . . . . . . . . . . . . . . . 337. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35No Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35No Picture (Sound OK) . . . . . . . . . . . . . . . . . . . . . . . . . . . 36No Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378. BLOCK DIAGRAM (LTW32AC) . . . . . . . . . . . . . . . . . . . . . . 38BLOCK DIAGRAM (LTW32DF) . . . . . . . . . . . . . . . . . . . . . . . 399. PCB LAYOUT(LTW32AC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 40PCB LAYOUT(LTW32DF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4310. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4611. CRICUIT DIAGRAMNANUAl SERVlE 3AC VOLTMETERGood earth groundsuch as a water pipe, con-duit etc.To instrument`sexposedMETALLIC PARTSImportant Safety NoticeMany electrical and mechanical parts in this chassis have special safety-related characteristics.These parts are identified by in the Schematic Diagram and Replacement Parts List.It is essential that these special safety parts should be relpaced with same components asRecommended in this manual to prevent Shock, or File, or other Harzards.Do not modify the original design without permission of menufacturer.Leakage Current Hot Check (See Below Figure)Plug the Ac cord directly into the Ac outlet.Do not use a line Isolation Transformer during this check.Connect 1.5k/10 watt resistor in parallel with a 0.15uF capacitor between a known good earthgroung (Water pipe, Conduit, etc) and the exposed metallic parts.Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or moresensitivity.Reverse plug of the AC cord info the AC outlet and repeat AC voltage mresurements for eachexposed metallic part. Any voltage measured must not exceed 0.75 volt RMS, which is,corresponds to 0.5mA.In case any measurement is out of the limits specified, there is possibility of shock hazard andthe set must be checked repaired before it is returned to the customer.NANUAl SERVlE 4Panel TypeDisplay AreaDisplay ColorPixel PitchResolutionPC VideoAudioAntennaColor SystemReceiving SystemStereo TypeCertificationsPower ConsumptionSpeakerPlug & PlayScreen ControlPower SupplyRemote ControllerWeight DimensionPanelIn/OutTV SignalOthersTFT Color LCD697.685 x 392.256(32"), 819 x 460(37"), 930x 523mm(42")16.7 million0.17 x 0.51(32"), 0.20x0.60(37"), 0.227x 0.681mm x RGB(42")1366 x 768Analog RGB 15 pin D-subS-Video InVideo InputHDTV (Y,Pb,Pr) InputComposite InputPC InputHead-phone OutHDTV input75 ohm Coaxial cableM, M/NTRI(NTSC/PAL M/N) MTS, SurroundIEC60065116W(32") / 160W(37") / 205W(42") 10W x 10WDDC 1/2 BOn Screen Display MenuAC 100-250V~Yes32C": 21.5 Kg(net) 25.5 Kg(gross)32D": 21Kg(net) 24.5Kg(gross)37C": 31 Kg(net) 36.5 Kg(gross)42C": 35 Kg(net) 41 Kg(gross)42D": 34Kg(net) 40Kg(gross)32C": 1017 (W) x 585 (H) x 243 (D)32D": 807.6 (W) x 643 (H) x 243 (D)37C": 1144 (W) x 646 (H) x 288 (D)42C": 1260 (W) x 737 (H) x 288 (D)42D": 1063 (W) x 830 (H) x 290 (D)SPECIFICATION NANUAl SERVlE 52 3 1 4 587FrontABAB61. TV/VIDEO Display a menu of the available input sources.2. MENU Display the main on-screen menu. Exit from sub-menu.3. VOL(+/-) Press the increase or decrease the volume. Also used to increase or reducethe value of a menu option.4. CH( / ) Press CH or CH to change channels. Also used to highlight selections onthe on-screen menus.5. POWER Sub Power ON/OFF6. STAND BY The color of LED is changed into RED.ON The color of LED is changed into GREEN.7. Remote Control Sensor8. POWER ON/OFFAC turns ON/OFF NANUAl SERVlE 61. ANTENNA JACK Connect to an antenna or a cable TV system2. AV OUTPUT Used to connect a video signal from a VTR or DVD3. HEADPHONE Connect to an head phone4. A/V IN Audio signals from VCR or similar device.(Audio input of A/V IN is used com-monly with SVHS)5. S-VIDEO S-Video signal from an VCR or laserdisc player6. HDTV INPUT Video signals from a HDTV player7. PC D-SUB Used to connect a video signal from a personal computer8. PC AUDIO Connects to the sound-output port of a personal computer9. RS-232C JACK Do not use this jack for customers10. AC INLET Use 100-250V AC, 50/60 Hz.To prevent electrical shocks and fire hazards, do not use any other power source.11. MAIN POWER SWITCH H/P37"/42"32"RearNANUAl SERVlE 7Point to remote control sensor of the TV set.The maximum operable distance is approximately 20 feet from the remote control sensor,and not more than 30 to either side of center.The operation of the remote control is most effective when there is nothing between it andthe remote control sensor.The duration of the batteries is approximately 6 months to 1 year.Replace the batteries when the remote operation becomes unstable.BATTERY INSTALLATION The battery compartment is located beneath the sliding cover.Press the indentation and lift up the cover while sliding it down. Correctly install the batteries, observing polarities as shown in the compartment.Do not use a combination of old and new batteries or batteries of different types.If batteries become exhausted, remove and replace them soon.When battery leakage occurs, clean the battery compartment with a soft cloth and replacethe batteries.Power ButtonScreen Adjust Button100 ButtonAV Select ButtonOSD Menu select ButtonTV/CATV ButtonAdd/Delete ButtonSize ButtonChannel Up( )/down( ) ButtonSound Standard ButtonAuto Adjust Button MTS ButtonPicture Standard ButtonCCD ButtonVolume Up(+)/Down(-) ButtonDisplay ButtonPC/TV ButtonSource ButtonQuick View ButtonSleep ButtonMute ButtonNumber ButtonNANUAl SERVlE 8FACTORY1. This mode uses the standard remote control. In the stand-by mode. Press display+ MENU + 3 + 8 + Power(on) button on the remote controller in --> sequence2. The factory mode will be displayed. The factory mode has three components:Set option, Vol. Test, Service 1, Service2, Option 1, Option 2, EEPROM Reset.3. Access the adjustment mode by pressing the VOLUME keys (+/-). The adjustmentparameters adjusted are listed in the accompanying table, and they are selectedby pressing the CH keys ( .4. The VOLUME keys increase or decrease the adjustment values.1. Set Option2. Vol. Test3. Service 14. Service 25. Option 16. Option 27. EEPROM Reset32LPL32AUO42LPLMinMaxContrastBrightnessColorPC ContrastHalf Tone (OFF, STEP1~3)LanguageCCDV-ChipVideo MuteInit. ModeNo sig. P OffMTS (AUTO, Manual)NANUAl SERVlE 9[1] IC501 : SVP-EX52(Trident)NANUAl SERVlE 10NANUAl SERVlE 11NANUAl SERVlE 12NANUAl SERVlE 13NANUAl SERVlE 14NANUAl SERVlE 15NANUAl SERVlE 16NANUAl SERVlE 17NANUAl SERVlE 18NANUAl SERVlE 19NANUAl SERVlE 20[2] IC001 : M30620NANUAl SERVlE 21NANUAl SERVlE 22[3] IC002 : EN29LV040ANANUAl SERVlE 23NANUAl SERVlE 24[4] IC01 : TEA6425NANUAl SERVlE 25[5] IC09 : MSP3420GNANUAl SERVlE 26NANUAl SERVlE 27[6] IC402 : NJM2235( Only: LTW32AC)NANUAl SERVlE 28[7] IC661, IC662: MP7720NANUAl SERVlE 29NANUAl SERVlE 30[8] IC982: MST9883NANUAl SERVlE 31[9] IC663: TDA1517NANUAl SERVlE 32NANUAl SERVlE 33[10] IC511: HY5DU283222AQPNANUAl SERVlE 34NANUAl SERVlE 356. TROUBLESHOOTING 1. NO POWERNOAC 220VNOAC 220VNOSTAND BY : 5VNOPower ON: 3.3VNOPower : 12V, 3.3V, 5V, 33V, BL3.3VNOPower : 24VYESYESYESYESYESYESSTARTENDCHECK THE VOLTAGE BETWEENCN1(CN3)1) CHECK THE POWER SUPPLYOUTLET2) CHECK THE POWER CORD1) CHECK F1(250V 3A)2) CHECK C13) CHECK LF1CHECK THE VOLTAGE BETWEENCN1(CN3)CHECK AND REPLACE1) D20, L72) PC3, U6CHECK THE VOLTAGE OF CN801PIN8CHECK AND REPLACE1) QM801(Digital PCB)2) IC810(Digital PCB)CHECK THE VOLTAGE OF CN801PIN15CHECK AND REPLACE1) L3, L7, L9, Q5, U7(POWER PCB)2) L841, L802, L804, L808, QI901(Digital PCB)CHECK THE VOLTAGE OF CN801PIN1,2,5,6,7,10,12CHECK AND REPLACE1) L6, D11CHECK THE VOLTAGE OFCN901, CN902 2. NO PICTURE(SOUND OK)NOLVDS CABLENOINVERTER CABLENOLVDS POWER: 5V, 3.3VNOLVDS OPTION : 5V, 3.3V, 0V(GND)NOSCALERYESYESYESYESYESSTARTENDCHECKLVDS CABLECHECK AND REPLACE1) CONNECTED LVDS CABLE2) LVDS Cable(LG)3) LVDS Cable(AUO)CHECK AND REPLACE1) LG991 (LG-Panel : 12V), Q981, L9912) LS991 (AUO-Panel : 5V), Q981, L991CHECK THE VOLTAGE OFP901 PIN26~30CHECK AND REPLACE1) LG : RL902, RL920, RL922, RL9262) AUO : RS904, RA921, RS926CHECK THE VOLTAGE OFP901CHECK AND REPLACE1) XS0012) IC501CHECK THE WAVEFORM ATIC501 PIN216~218CHECKINVERTER CABLECHECK AND REPLACE1) CONNECTED INVERTER CABLE2) INVERTER Cable(LG)3) INVERTER Cable(AUO)NANUAl SERVlE 36TROUBLESHOOTING 3. NO SOUNDNOVOLUME