LG-J10HDD-hts-sm 维修电路原理图.pdf

2.1CH HOME THEATER SYSTEMSERVICE MANUALCAUTIONBEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”IN THIS MANUAL.SERVICE MANUALWebsite http:/Internal Use OnlyP/NO : AFN32759823 SEPTEMBER, 2007MODELS: J10HD-D/J10HDSPEAKERS: J10HD-SF/J10HD-SAMODELS: J10HD-D/J10HD (J10HD-SF/J10HD-SA)RadioFans.CN 收音机爱 好者资料库CONTENTSSECTION 1.SUMMARYSECTION 2.ELECTRICALSECTION 3.CABINET & MAIN CHASSISSECTION 4.REPLACEMENT PARTS LISTCopyright 2007 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use OnlyRadioFans.CN 收音机爱 好者资料库1-2SECTION 1SUMMARYCONTENTSPRODUCT SAFETY SERVICING GUIDELINES FOR HOME THEATER SYSTEM PRODUCTS.1-3SERVICING PRECAUTIONS.1-4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE (ES) DEVICESSERVICE INFORMATION FOR EEPROM.1-5SPECIFICATIONS.1-6Copyright 2007 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only1-3PRODUCT SAFETY SERVICING GUIDELINES FORHOME THEATER SYSTEM PRODUCTSIMPORTANT SAFETYNOTICEThis manual was prepared for use only by properly trained audio-video service tech-nicians.When servicing this product, under no circumstances should the original design bemodified or altered without permission from LG Corporation. All components shouldbe replaced only with types identical to those in the original circuit and their physicallocation, wiring and lead dress must conform to original layout upon completion ofrepairs.Special components are also used to prevent x-radiation, shock and fire hazard.These components are indicated by the letter “x” included in their component desig-nators and are required to maintain safe performance. No deviations are allowedwithout prior approval by LG Corporation.Circuit diagrams may occasionally differ from the actual circuit used. This way, imple-mentation of the latest safety and performance improvement changes into the set isnot delayed until the new service literature is printed.CAUTION: Do not attempt to modify this product in any way. Never perform cus-tomized installations without manufacturers approval. Unauthorized modifications willnot only void the warranty, but may lead to property damage or user injury.Service work should be performed only after you are thoroughly familiar with thesesafety checks and servicing guidelines.GRAPHIC SYMBOLSThe exclamation point within an equilateral triangle is intended to alertthe service personnel to important safety information in the service lit-erature.The lightning flash with arrowhead symbol within an equilateral trian-gle is intended to alert the service personnel to the presence of non-insulated “dangerous voltage” that may be of sufficient magnitude toconstitute a risk of electric shock.The pictorial representation of a fuse and its rating within an equilater-al triangle is intended to convey to the service personnel the followingfuse replacement caution notice:CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OFFIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RAT-ING AS MARKED NEAR EACH FUSE.SERVICE INFORMATIONWhile servicing, use an isolation transformer for protection from AC line shock. Afterthe original service problem has been corrected, make a check of the following:FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of adjacent com-ponent shorts. This is especially important on items trans-ported to and from therepair shop.2. Verify that all protective devices such as insulators, barriers, covers, shields, strainreliefs, power supply cords, and other hardware have been reinstalled per the orig-inal design. Be sure that the safety purpose of the polarized line plug has not beendefeated.3. Soldering must be inspected to discover possible cold solder joints, solder splash-es, or sharp solder points. Be certain to remove all loose foreign particles.4. Check for physical evidence of damage or deterioration to parts and components,for frayed leads or damaged insulation (including the AC cord), and replace if nec-essary.5. No lead or component should touch a high current device or a resistor rated at 1watt or more. Lead tension around protruding metal surfaces must be avoided.6. After reassembly of the set, always perform an AC leakage test on all exposedmetallic parts of the cabinet (the channel selector knobs, antenna terminals, han-dle and screws) to be sure that set is safe to operate without danger of electricalshock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THISTEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in thefollowing manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd150V AC type capacitor between a known good earth ground water pipe, conduit,etc.) and the exposed metallic parts, one at a time. Measure the AC voltage acrossthe combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plugby using a non-polarized adaptor and repeat AC voltage measurements for eachexposed metallic part. Voltage measured must not exceed 0.75 volts RMS. Thiscorresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a poten-tial shock hazard and must be corrected immediately.TIPS ON PROPER INSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelfspace over, or close to, a heat duct, or in the path of heated air flow. 2. Avoid conditions of high humidity such as: outdoor patio installations where dewis a factor, near steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies may obstruct venting. The customer should alsoavoid the use of decorative scarves or other coverings that might obstruct ventila-tion.4. Wall- and shelf-mounted installations using a commercial mounting kit must followthe factory-approved mounting instructions. Aproduct mounted to a shelf or plat-form must retain its original feet (or the equivalent thickness in spacers) to provideadequate air flow across the bottom. Bolts or screws used for fasteners must nottouch any parts or wiring. Perform leakage tests on customized installations.5. Caution customers against mounting a product on a sloping shelf or in a tilted posi-tion, unless the receiver is properly secured.6. Aproduct on a roll-about cart should be stable in its mounting to the cart.Caution the customer on the hazards of trying to roll a cart with small castersacross thresholds or deep pile carpets.7. Caution customers against using extension cords. Explain that a forest of exten-sions, sprouting from a single outlet, can lead to disastrous consequences tohome and family.Copyright 2007 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only1-4SERVICING PRECAUTIONSCAUTION: Before servicing the HOME THEATER SYSTEMcovered by this service data and its supplements andaddends, read and follow the SAFETY PRECAUTIONS.NOTE: if unforeseen circumstances create conflict betweenthe following servicing precautions and any of the safety pre-cautions in this publications, always follow the safety pre-cautions.Remember Safety First :General Servicing Precautions1.Always unplug the HOME THEATER SYSTEM AC powercord from the AC power source before:(1) Removing or reinstalling any component, circuit board,module, or any other assembly.(2) Disconnecting or reconnecting any internal electricalplug or other electrical connection.(3) Connecting a test substitute in parallel with an elec-trolytic capacitor.Caution : A wrong part substitution or incorrect polari-ty installation of electrolytic capacitors may result in anexplosion hazard.2.Do not spray chemicals on or near this HOME THEATERSYSTEM or any of its assemblies.3.Unless specified otherwise in this service data, clean elec-trical contacts by applying an appropriate contact cleaningsolution to the contacts with a pipe cleaner, cotton-tippedswab, or comparable soft applicator. Unless specified otherwise in this service data, lubricationof contacts is not required.4.Do not defeat any plug/socket B+ voltage interlocks withwhitch instruments covered by this service manual mightbe equipped.5.Do not apply AC power to this HOME THEATER SYSTEMand / or any of its electrical assemblies unless all solidstatedevice heat sinks are correctly installed.6.Always connect the test instrument ground lead to anappropriate ground before connecting the test instrumentpositive lead. Always remove the test instrument groundlead last.Insulation Checking ProcedureDisconnect the attachment plug from the AC outlet and turnthe power on. Connect an insulation resistance meter (500V)to the blades of the attachment plug. The insulation resist-ance between each blade of the attachment plug and acces-sible conductive parts (Note 1) should be more than 1Mohm.Note 1 : Accessible Conductive Parts include Metal panels,Input terminals, Earphone jacks,etc.Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damagedeasily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples oftypical ES devices are integrated circuits and some fieldeffect transistors and semiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.1.Immediately before handling any semiconductor compo-nent or semiconductor-equipped assembly, drain off anyelectrostatic charge on your body by touching a knownearth ground. Alternatively, obtain and wear a commercial-ly available discharging wrist strap device, which shouldbe removed for potential shock reasons prior to applyingpower to the unit under test.2.After removing an electrical assembly equipped with ESdevices, place the assembly on a conductive surface suchas aluminum foil, to prevent electrostatic charge buildup orexposure of the assembly.3.Use only a grounded-tip soldering iron to solder or unsol-der ES devices.4.Use only an anti-static solder removal device. Some solderremoval devices not classified as “anti-static” can generateelectrical charges sufficient to damage ES devices.5.Do not use freon-propelled chemicals. These can generatean electrical charge sufficient to damage ES devices.6.Do not remove a replacement ES device from its protec-tive package until immediately before you are ready toinstall it. (Most replacement ES devices are packaged withleads electrically shorted together by conductive foam,aluminum foil,or comparable conductive material).7.Immediately before removing the protective material fromthe leads of a replacement ES device, touch the protectivematerial to the chassis or circuit assembly into which thedevice will be installed.Caution: Be sure no power is applied to the chassis or cir-cuit, and observe all other safety precautions.8.Minimize bodily motions when handling unpackagedreplacement ES devices. (Normally harmless motion suchas the brushing together of your clothes fabric or the liftingof your foot from a carpeted floor can generate static elec-tricity sufficient to damage an ES device.)Copyright 2007 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only1-5SERVICE INFORMATION FOR EEPROM1. Press the CLEAR button on the remote control together with STOP button on the front panel about 6 sec.The picture on OSD will be as bellow :* Refer to page 4-12. To MOVE from OP1 (Option 1) to another option, pressbutton on the remote control.3. To CHANGE the option code, pressbutton on the remote control.4. To APPLY the option code, after change the option press ENTER button on remote control.5. OSD “Write OK”.6. To INITIALIZE the system, press CLEAR button on the remote control together with STOP button on the frontpanel about 6 sec.7. To exit from the option code menu without initialize the system, just turn off the power and then turn on again.OP1 : 0000000000MASK : 30OP2 : 0000000000E : FF (OR)OP3 : 0000000000D39OP4 : 0000000000OP5 : 0000000000OP6 : 0000000000OP7 : 0000000000OP8 : 0000000000EXIT :OP9 : 0000000000MOVE : OPA : 0000000000E D I TCopyright 2007 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only1-6SPECIFICATIONS GENERALDimensions (approx.)326 X 215 X 78mm (w x h x d) without footMass (approx.)3.1kgOperating temperature5C to 35COperating humidity5% to 90%Audio recording formatSampling frequency44.1kHzCompression formatMP3Sampling bitrate128Kbps RECORDINGRecordable mediaHDD (80GB) PLAYBACKFrequency responseDVD (PCM 48kHz) : 20Hz to 20kHz, CD : 20Hz to 20kHzDVD (PCM 96kHz) : 20Hz to 44kHzSignal-to-noise ratioMore than 85dB (SPEAKER OUT)Harmonic distortionLess than 0.007% (SPEAKER OUT)Dynamic rangeMore than 85dB (SPEAKER OUT) INPUTSAudio input (optical audio)3V (p-p), 75, Optical connector x 1VIDEO IN1.0Vp-p 75ohms, sync negative, SCART x 1AUDIO IN0dBm more than 47kohms, RCA jack (L, R) x 1 / SCART x 1 OUTPUTSVIDEO OUT1Vp-p 75, sync negative, RCA jack x 1 / SCART x 1COMPONENT VIDEO OUT(Y) 1.0V (p-p), 75, negative sync, RCA jack x 1(Pb) / (Pr) 0.7V (p-p), 75, RCA jack x 2HDMI video / audio output19pin (HDMI standard, Type A) AMPLIFIEROutput powerFront : 75W + 75W (4 at 1kHz, THD 10%)Subwoofer : 150W (3 at 60Hz, THD 10%) TUNER SPECIFICATIONSTuning Range (FM)87.5 - 108MHzIntermediate Frequency (FM)10.7MHzSignal-to-noise ratio60dB(Mono)Tuning Range (AM)522 - 1,611kHzIntermediate Frequency (AM)450kHzAntennaWire antenna (FM)Loop antenna (AM) SPEAKERSFront (J10HD-SF)Active Subwoofer (J10HD-SA)Type :2 Way 3 SpeakerPower requirements :AC 200 - 240V, 50/60HzImpedance :4Power consumption : 75WFrequency Response :100 - 20,000HzType : 1 Way 1 SpeakerSound Pressure Level :82dB/W (1m)Impedance : 3Max. Input Power :150WFrequency Response : 65 - 1,500HzNet Dimensions (WxHxD) : 104 x 328 x 21mmSound Pressure Level : 80dB/W (1m)Net Weight :2.9kgMax. Input Power : 300WNet Dimensions (WxHxD) : 216x 328 x 317mmNet Weight : 8.3kgCopyright 2007 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only2-1SECTION 2ELECTRICALCONTENTSELECTRICAL TROUBLESHOOTING GUIDE.2-21. SMPS TROUBLESHOOTING FLOW .2-22. DC/DC TROUBLESHOOTING FLOW.2-53. AMP PROTECTION.2-8WAVEFORMS.2-91. WHEN POWER ON, RESET (DVD & -COM)WAVEFORM .2-9 2. AT USB FUNCTION, DP, DM WAVEFORM.2-93. STARTING ACTION WAVEFORM IN MD DEVICE .2-104. AT DVD FUNCTION.2-105. AT POWER ON, SPINDLE SIGNALAT MD DECK.2-116. TRACKING SIGNAL.2-117. DISK TYPE JUGEMENT WAVEFORM.2-12WIRING DIAGRAMS.2-131. ACTIVE SUBWOOFER WIRING DIAGRAM.2-132. MAIN SYSTEM WIRING DIAGRAM.2-15BLOCK DIAGRAMS.2-171. ACTIVE SUBWOOFER BLOCK DIAGRAM.2-172. MAIN SYSTEM BLOCK DIAGRAM.2-193. DC/DC SMPS BLOCK DIAGRAM .2-214. DC/DC CONVERTER BLOCK DIAGRAM.2-23CIRCUIT DIAGRAMS.2-251. SMPS (POWER) CIRCUIT DIAGRAM .2-252. SMPS (DC/DC CONVERTER)CIRCUIT DIAGRAM.2-273. AMP & PWM CIRCUIT DIAGRAM.2-294. I/O & POWER CIRCUIT DIAGRAM.2-315. XM READY CIRCUIT DIAGRAM.2-336. -COM (MAIN) CIRCUIT DIAGRAM.2-357. RF, DRIVE & OPU CIRCUIT DIAG