LG-DV7811E6S-cd-sm 维修电路原理图.pdf

DVD VIDEO PLAYERSERVICE MANUALMODELS : DVD6054/DVD6184(DV7511E6S/DV7811E6S)MODELS : DVD6054/DVD6184(DV7511E6S/DV7811E6S)SERVICE MANUALP/NO : 3829RHP017ASEPTEMBER, 2003Printed in KoreaCAUTIONBEFORE SERVICING THE UNIT, READ THE “SAFETYPRECAUTIONS”IN THIS MANUAL.DVD6054DVD6184RadioFans.CN 收音机爱 好者资料库SECTION 1SUMMARYCONTENTSPRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-2SERVICING PRECAUTIONS. 1-3 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive DevicesSPECIFICATIONS. 1-4RadioFans.CN 收音机爱 好者资料库1-2IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-video servicetechnicians.When servicing this product, under no circumstances should the originaldesign be modified or altered without permission from LG ElectronicsCorporation. All components should be replaced only with types identical tothose in the original circuit and their physical location, wiring and lead dressmust conform to original layout upon completion of repairs.Special components are also used to prevent x-radiation, shock and fire haz-ard. These components are indicated by the letter “x” included in their compo-nent designators and are required to maintain safe performance. No deviationsare allowed without prior approval by LG Electronics Corporation.Circuit diagrams may occasionally differ from the actual circuit used. This way,implementation of the latest safety and performance improvement changesinto the set is not delayed until the new service literature is printed.CAUTION: Do not attempt to modify this product in any way. Never performcustomized installations without manufacturers approval. Unauthorized modi-fications will not only void the warranty, but may lead to property damage oruser injury.Service work should be performed only after you are thoroughly familiar withthese safety checks and servicing guidelines.GRAPHIC SYMBOLSThe exclamation point within an equilateral triangle is intended toalert the service personnel to important safety information in theservice literature.The lightning flash with arrowhead symbol within an equilateral tri-angle is intended to alert the service personnel to the presence ofnoninsulated “dangerous voltage” that may be of sufficient magni-tude to constitute a risk of electric shock.The pictorial representation of a fuse and its rating within an equi-lateral triangle is intended to convey to the service personnel thefollowing fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE ANDRATING AS MARKED NEAR EACH FUSE.SERVICE INFORMATIONWhile servicing, use an isolation transformer for protection from AC line shock.After the original service problem has been corrected, make a check of the fol-lowing:FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of adjacentcomponent shorts. This is especially important on items trans-ported to andfrom the repair shop.2. Verify that all protective devices such as insulators, barriers, covers, shields,strain reliefs, power supply cords, and other hardware have been reinstalledper the original design. Be sure that the safety purpose of the polarized lineplug has not been defeated.3. Soldering must be inspected to discover possible cold solder joints, soldersplashes, or sharp solder points. Be certain to remove all loose foreign par-ticles.4. Check for physical evidence of damage or deterioration to parts and compo-nents, for frayed leads or damaged insulation (including the AC cord), andreplace if necessary.5. No lead or component should touch a high current device or a resistor ratedat 1 watt or more. Lead tension around protruding metal surfaces must beavoided.6. After reassembly of the set, always perform an AC leakage test on allexposed metallic parts of the cabinet (the channel selector knobs, antennaterminals, handle and screws) to be sure that set is safe to operate withoutdanger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms pervolt or more sensitivity in the following manner: Connect a 1500 ohm, 10watt resistor, paralleled by a .15 mfd 150V AC type capacitor between aknown good earth ground water pipe, conduit, etc.) and the exposed metal-lic parts, one at a time. Measure the AC voltage across the combination of1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using anon-polarized adaptor and repeat AC voltage measurements for eachexposed metallic part. Voltage measured must not exceed 0.75 volts RMS.This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-tutes a potential shock hazard and must be corrected immediately.TIPS ON PROPER INSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely fittingshelf space 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 wheredew is a factor, near steam radiators where steam leakage is a factor, etc.3. Avoid placement where draperies may obstruct venting. The customershould also avoid the use of decorative scarves or other coverings thatmight obstruct ventilation.4. Wall- and shelf-mounted installations using a commercial mounting kit mustfollow the factory-approved mounting instructions. A product mounted to ashelf or platform must retain its original feet (or the equivalent thickness inspacers) to provide adequate air flow across the bottom. Bolts or screwsused for fasteners must not touch any parts or wiring. Perform leakage testson customized installations.5. Caution customers against mounting a product on a sloping shelf or in a tilt-ed position, unless the receiver is properly secured.6. A product 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 cast-ers across thresholds or deep pile carpets.7. Caution customers against using extension cords. Explain that a forest ofextensions, sprouting from a single outlet, can lead to disastrous conse-quences to home and family.A.C. Voltmeter1500 OHM10 WATTPlace this probeon each exposedmetal part.Good Earth Groundsuch as the WaterPipe, Conduit, etc.0.15uFPRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS1-3SERVICING PRECAUTIONSCAUTION : Before servicing the DVD covered by this servicedata and its supplements and addends, read and follow theSAFETY PRECAUTIONS. NOTE : if unforeseen circum-stances create conflict between the following servicing pre-cautions and any of the safety precautions in this publica-tions, always follow the safety precautions.Remembers Safety First:General Servicing Precautions1. Always unplug the DVD AC power cord from the ACpower source before:(1)Removing or reinstalling any component, circuit board, module, or any other assembly.(2)Disconnection 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 polarity installation of electrolytic capacitors may resultin an explosion hazard.2. Do not spray chemicals on or near this DVD or any ofits assemblies.3. Unless specified otherwise in this service data, cleanelectrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner,cotton-tipped swab, 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 DVD and/or any of itselectrical assemblies unless all solid-state device heatsinks are cerrectly installed.6. Always connect test instrument ground lead to theappropriate ground before connection the test instrumentpositive lead. Always remove the test instrument ground lead 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 resis-tance between each blade of the attachment plug and acces-sible conductive parts (Note 1) should be more than 1M-ohm.Note 1 : Accessible Conductive Parts including Metal pan-els, 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 commer-cially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.3. Use only a grouned-tip soldering iron to solder or unsolderES devices.4. Use only an anti-static solder removal device. Somesolder removal devices not classified a “anti-static” cangenerate electrical charges sufficient to damage ES devices.5. Do not use freon-propelled chemicals. These cangenerate electrical charge sufficient to damage ESdevices.6. Do not remove a replacement ES device from its protective 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 orcircuit, and observe all other safety precautions.8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as 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.)1-4SPECIFICATIONS GENERALPower requirementsAC 120V, 60HzPower consumption14WDimensions(approx.)430 x 43 x 242mm (W/h/d)Weight(approx.)2.34kgOperating temperature5C to 35C (41F to 95F)Operating humidity5% to 90% SYSTEMLaserSemiconductor laser, wavelength 650nmSignal systemPAL/NTSCFrequency responseDVD (PCM 96kHz): 8Hz to 44kHzDVD (PCM 48kHz): 2Hz to 22kHzCD: 8Hz to 20kHzSignal-to-noise ratioMore than 100dB (ANALOG OUT connectors only)Harmonic distortionLess than 0.008%Dynamic rangeMore than 100dB(DVD)More than 95dB(CD) OUTPUTSVIDEO OUT1 V (p-p) 75 , sync negative, RCA jack x 1 (TO TV)Audio output (digital audio)0.5 V (p-p), 75 , RCA jack x 1Audio output (analog audio)2.0 Vrms (1 kHz, 0 dB), 600 ,RCA jack (L, R) x 1 (TO TV)2-1SECTION 2CABINET & MAIN CHASSISCONTENTS1. EXPLODED VIEWS.2-21. Cabinet and Main Frame Section.2-22. Packing Accessory Section.2-52-2EXPLODED VIEWS1. Cabinet and Main Frame Section463463250A00463463300283280A42A49A47A48A44A43A46260261261463320463467463465452SCART&5.1CHMODELONLYOPTIONAL PARTA54321BCD2-3 Cabinet and Main Frame Section Cabinet and Main Frame Section Part ListSALLOCA.NOPART NO(LG)ABDESCRIPTIONSPECIFICATIONREMARKSASSEMBLY PARTS SECTIONA426871R-5725AOPWB(PCB) ASSEMBLY,TOTALDV7000S 5TOOL KEY SHA426871R-5728AOPWB(PCB) ASSEMBLY,TOTALDV7000S 8TOOL KEY SHA433501RF3007COBOARD ASSEMBLYDVD DV7811E4M HA3GLLA433501RF6694FOBOARD ASSEMBLYDVD DV7511E6L HA8PLLA443141R-D003FOCHASSIS ASSEMBLYDV7510E LSI,MTK 55MMNSPA443141R-D004FOCHASSIS ASSEMBLYDV7810E MTK 43MMA466885R-1015DOSUB PWB(PCB) ASSEMBLYDV7511E6S HA8PLLA466885R-1015JOSUB PWB(PCB) ASSEMBLYDV7811E6S HA8PLLA476871R-7604COPWB(PCB) ASSEMBLY,TOTALDV7000S SMPS SH 220V(CE)A476871R-7604DOPWB(PCB) ASSEMBLY,TOTALDV7000S LSI SMPS SH 220V (CE)A486871R-7601COOPWB(PCB) ASSEMBLY,TOTALDV7000S MTK SH SCARTA496871R-5715AOPWB(PCB) ASSEMBLY,TOTALDV7000S 5TOOL TIMER SHA496871R-5718AOPWB(PCB) ASSEMBLY,TOTALDV7000S 8TOOL TIMER SHPARTS SECTION2503110R-D001AOCASEDV7000 PRESS 430-55(A288G)2503110R-D004AOCASEDV7000 PRESS 43MM A288G2603140R-D002AOOCHASSISDV7000 PRESS MAINNSP2615040R-0069DOORUBBERFOOT(SILICONE SPONGE DS-08 T=2803721R-F306FOPANEL ASSEMBLY,FRONTNORMAL PADV7511E6L HA8PLLNSP2803721R-F318COPANEL ASSEMBLY,FRONTNORMAL PADV7811E4M HA3GLLNSP2833581R-T068BODOOR ASSEMBLYTRAY DV7500 (CHINA)2833581R-T069AODOOR ASSEMBLYTRAY DV7800 (SPRAY)3006410RCHX03AOOPOWER CORDCE-503/JL201B H03VVH2-F 2X0.753203720R-D072FOPANEL,VIDEODVD DV7510E PRESS LSI,MTK 55MM3203720R-D074FOPANEL,VIDEODVD DV7810E PRESS MTK 43MMSCREW452353-051AOSCREWSPECIAL452353-051AOSCREWSPECIAL463353-051GOOSCREW,DRAWING+ 2 D3.0 L8.0 MSWR3/FN TB ROUN465353-046KOOSCREWSPECIAL (3X10 B.K)467353-046NOOSCREW,DRAWINGSPECIAL(3X8 BK.)MODELS:(A)DV7511E6S(DVD6054) (B)DV7811E6S(DVD6184)3. Packing Accessory SectionBATTERY808PACKING SHEET804PACKINGOPTIONAL PARTS803806OWNERS MANUALCABLE DIN810CABLE ASSY801REMOCON900BOX CARTON802PACKING803811812PLUG ASSY 1WAY(YELLOW)PLUG ASSY 2WAY2-4 Packing Accessory Section Part ListSALLOCA.NOPART NO(LG)ABDESCRIPTIONSPECIFICATIONREMARKS8013835RS0063WOINSTRUCTION ASSEMBLYDVD DV7511E6S HA8PLL8013835RS0064AOINSTRUCTION ASSEMBLYDVD DV7811E6S HA8PLL8023890R-H803LOOBOXDV7511E6M HA8PLL SWW3-A 0.8708033920R-E066AOOPACKING,CASINGDV7000 0.02 68 EPS 10 1165 238804292-053BOOBAGSOFT(MIDI)NSP808841-0021OOBATTERY,MNER03X HI WATT 1.5V .MA/H AAA8106851RP0003NOOCABLE ASSY,RFDVD CABLE ASSY,RCA USING AREA8116611R1G001AOOPLUG ASSY1WAY YELLOW GLOBAL8126611R2G001AOOPLUG ASSY2WAY RED/WHITE GLOBAL9006711R1P063AOOREMOTE CONTROLLER ASSEMBLYN6 UNIFIED DV7520E LG W/O DISCMODELS:(A)DV7511E6S(DVD6054) (B)DV7811E6S(DVD6184)3-1SECTION 3ELECTRICALCONTENTSDVD PARTELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS. 3-21. System Clock X501 (27Mhz) . 3-22. Initializing between MPEG and SDRAM . 3-23. Initializing between MPEG and Flash. 3-34. Reference Voltage 1. 3-35. Reference Voltage 2. 3-46. Checking the initial step of M/D Assy . 3-47. Checking the Video Signal . 3-58. Checking the first step of servo (1). 3-59. Checking the second step of servo (2) . 3-610. Checking the output of Audio signal. 3-611. Checking the reset port. 3-712. Checking the focus & tracking servo. 3-713. Checking the track jump. 3-814. The status of CD_LD and DVD_LD in the PLAY MODE . 3-815. The status Focus and spindle motor. 3-916. DATA STREAM . 3-917. Input Clock to IC202. 3-1018. Tray Open and Close. 3-1019. Focus Drive signa