LG-LHT3602SE-cdr-sm 维修电路原理图.pdf

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1、DVD/CD RECEIVERSERVICE MANUALMODELS : LH-T360SE/LH-T3602SE/LH-T3600SE/LH-T361SE/LH-T360XSERVICE MANUALMODELS : LH-T360SE/LH-T3602SE/LH-T3600SE/LH-T361SE/LH-T3630XRadioFans.CN 收音机爱 好者资料库1-1CONTENTSSECTION 1. GENERAL SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . 1-2 ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SERVICE INFORMATION FOR EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 SPECIFICATIONS . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6SECTION 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、 . . . . 2-8 PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32SECTION 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 DVD & AMP CIRCUIT DIAGRAMS . . . . . .

6、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22 PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1SECT

7、ION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1RadioFans.CN 收音机爱 好者资料库1-2SERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transpo

8、rt and storage1) The pick-up should always be left in its conductive bag until immediately prior to use.2) The pick-up should never be subjected to external pressure or impact.2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) Th

9、e pick-up should always be handled correctly and carefully, taking care to avoid external pressure andimpact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/ordamage to the printed-circuit board.3) Each and every pick-up is already individually adju

10、sted to a high degree of precision, and for that reasonthe adjustment point and installation screws should absolutely never be touched.4) Laser beams may damage the eyes!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the

11、pick-up if it is damaged.5) Cleaning the lens surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as usedfor camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cot-ton swab should be used, taking care

12、not to distort this.6) Never attempt to disassemble the pick-up.Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too muchof this alcohol on the swab,

13、and do not allow the alcohol to get inside the pick-up.Storage in conductive bagDrop impactNEVER look directly at the laser beam, and dont let contact fingers or other exposed skin.MagnetHow to hold the pick-upConductive SheetCotton swabPressurePressureSECTION 1. GENERAL1-3NOTES REGARDING COMPACT DI

14、SC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These componentsare sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, componentscan be damaged, and for that reason component

15、s should be handled with care.2) The pick-up is composed of many optical components and other high-precision components. Care must betaken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnet-ism is present, or where there is excessive dust.2. Notes f

16、or repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.When removing the laser pick-up from its conductive bag,

17、do not place the pick-up on the bag. (This isbecause there is the possibility of damage by static electricity.)4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1M )6) Care should be taken not to permit the laser pick-up to

18、 come in contact with clothing, in order to preventstatic electricity changes in the clothing to escape from the armband.7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.Resistor(1 Mohm)ConductiveSheetResistor(1 Mohm)Armband1-4ESD PRECAUTIONSElectrostatically

19、Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip c

20、omponents. The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth grou

21、nd. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surfaces

22、uch as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static cangenerate electrical cha

23、rges sufficient to damage ESD devices.5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDdevices.6. Do not remove a replacement ESD device from its protective package until immediately before you areready to install it. (Most replacement ESD device

24、s are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which t

25、he device will by installed.CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHERSAFETY PRECAUTIONS.8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifti

26、ng of your foot from a carpeted floor can gener-ate static electricity sufficient to damage an ESD device).CAUTION. GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, ISINTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” T

27、HAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.1-5SERVICE INFORMATION FOR EEPROMPOWER ONDVD LOGO Status (NO D

28、isk status)Remotecontrol Pause key-1-4-7-2 in order.Press number 09, Press charaterAF (16 for a while)Use arrow key ( ) tomove to approprite position andmake changesPress pause key onceChange will be applied when powerOFF-ON.* OPTION NTSC model doesnt have VCR option and use DVD option BF as VCR opt

29、ion. (only DVD exist) PAL model has another separate VCR option. (Both VCR and DVD exist)NAMEHEXOPT 100OPT 200OPT 300OPT 400OPT 500OPT 600OPT 700OPT 800OPT 900OPT A00OPT B00OPT C00OPT D00OPT E00OPT F00OPT G00DETECT NEW EEPROM(OPTION EDIT SCREEN)1-6SPECIFICATIONS(* Depending on the sound modesettings

30、 and the source, there maybe no sound output.)GENERALPower supply Refer to main labelPower consumption Refer to main labelNet Weight 3.9 kgExternal dimensions (W x H x D)430 x 57 x 295 mmOperating conditions Temperature: 5C to 35C, Operation status: HorizontalOperating humidity 5% to 85%CD/DVDLaser

31、Semiconductor laser, wavelength 650 nmSignal system PAL 625/50, NTSC 525/60Frequency response (audio) 150 Hz to 18 kHzSignal-to-noise ratio (audio) More than 75 dB (1 kHz, NOP -6 dB, 20 kHz LPF/A-Filter)Dynamic range (audio) More than 70 dBHarmonic distortion (audio) 0.5 % (1 kHz, at 1W position) (2

32、0 kHz LPF)VIDEOVideo output 1.0 V (p-p), 75 , negative sync., SCART (TO TV)TUNERFMTuning Range 87.5 - 108.0 MHz or 65.0 - 74.0 MHz, 87.5 - 108.0 MHzIntermediate Frequency 10.7 MHzSignal-to Noise Ratio 60 dB (Mono)Frequency Response 140 - 8,000 HzAM MWTuning Range 522 - 1,620 kHz or 520 - 1,720 kHzIn

33、termediate Frequency 450 kHzAMPLIFIER(LH-T36s)Stereo mode 45W + 45W (Rated Output Power 30W, 4 at 1 kHz, THD 10 %)Surround mode Front: 45W + 45W (Rated Output Power 30W, THD 10 %)Center*: 45WSurround*: 45W + 45W(Rated Output Power 30W, 4 at 1 kHz, THD 10 %)Subwoofer*: 75W (Rated Output Power 60W, 8

34、at 30 Hz, THD 10 %)InputAUX INOutputsMONITOR, PHONES: (32 , 1.0 V)SPEAKERS(LHS-36SE)Front/Rear/Center SpeakerPassive Subwoofer(LHS-36SES) (LHS-36SEW)Type 1 Way 1 Speaker 1 Way 1 SpeakerImpedance 4 8 Frequency Response 150 - 20,000 Hz 65 - 1,500 HzSound Pressure Level 85 dB/W (1m) 87 dB/W (1m)Rated I

35、nput Power 45 W 75 WMax. Input Power 90 W 150 WNet Dimensions (W x H x D) 105 x 99 x 83 mm 175 x 351 x 270 mmNet Weight 0.45kg 3.4kg2-1SECTION 2. AUDIO PARTAUDIO TROUBLESHOOTING GUIDE1. POWER SUPPLY CIRCUIT2-22. FRONT CIRCUIT (1/2)PIN2PIN1PIN3PIN12: -22 FL+: -41 VKK: -26.5 FL-: +5.0P1301Short 1pin o

36、f CN901 with 4pin of CN901 in SMPS part.CHECK IF THE P1301 IS OK?CHECK IF THE DIS301 IS OK?2-33. FRONT CIRCUIT (2/2)CHECK IFR345 R350, R154OK.REPLACER345 R350, R154.Check ifthe Remoconwaceform of theP3101 pin 10is OKCheck ifthe RM301voltage is OK(5V)Resoldering or Replace RM3012-42-5WIRING DIAGRAM2-

37、62-7BLOCK DIAGRAM2-82-9CIRCUIT DIAGRAMS 1. SMPS(POWER) CIRCUIT DIAGRAM (1000W, LH-T96s)NOTES) Symbol denotes AC ground.NOTES) Symbol denotes DC chassis ground.NOTE) WarningNOTE) Parts that are shaded are criticalNOTE) With respect to risk of fire orNOTE) electricial shock.A123456789101112BCDEFGHIJKL

38、MNOPQRST2-102-112. SMPS(POWER) CIRCUIT DIAGRAM (700W, LH-T76s)A123456789101112BCDEFGHIJKLMNOPQRSTNOTES) Symbol denotes AC ground.NOTES) Symbol denotes DC chassis ground.NOTE) WarningNOTE) Parts that are shaded are criticalNOTE) With respect to risk of fire orNOTE) electricial shock.2-122-133. SMPS(P

39、OWER) CIRCUIT DIAGRAM (300W, LH-T36s)NOTES) Symbol denotes AC ground.NOTES) Symbol denotes DC chassis ground.NOTE) WarningNOTE) Parts that are shaded are criticalNOTE) With respect to risk of fire orNOTE) electricial shock.A123456789101112BCDEFGHIJKLMNOPQRST2-142-154. POWER INTERFACE CIRCUIT DIAGRAM

40、A123456789101112BCDEFGHIJKLMNOPQRST2-162-175. -COM(MAIN) CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOPQRST2-182-196. SERVO CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOPQRST2-202-217. I/O CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOPQRST2-222-238. MIC CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOP

41、QRST2-242-259. USB CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOPQRST2-262-2710. MIC & USB CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOPQRST2-282-2911. HDMI CIRCUIT DIAGRAM(OPTIONAL PART)A123456789101112BCDEFGHIJKLMNOPQRST2-302-3112. FRONT CIRCUIT DIAGRAMA123456789101112BCDEFGHIJKLMNOPQRST2-322-33P

42、RINTED CIRCUIT BOARD DIAGRAMS1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW )2-342-352. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW )2-362-373. SMPS P.C. BOARD (1000W, LH-T96S)( TOP VIEW )( BOTTOM VIEW )5. SMPS P.C. BOARD (300W, LH-T36S)4. SMPS P.C. BOARD (700W, LH-T76S)2-382-396. KEY P.C. BOARD7. TIMER P.C. BOARD

43、( BOTTOM VIEW )( TOP VIEW )( TOP VIEW )( BOTTOM VIEW )3-1ELECTRICAL TROUBLESHOOTING GUIDE1. System operation flowPower OnNoYesYesYesNoNoNoShow LOGOTray Closed?Tray Close to Closed positionSLED Moves to Inner PositionRecieveOPEN/ CLOSEKey?ReceiveCLOSE Key?1. Stop Playback & Open Tray2. Display tray o

44、pen message & LOGO1. Execute Pressed Key & IR Key2. Systemoperati on Routi ne Loop1. Judge whether have disc and disc type2. Jump to related disc reading procedureSLED at InnerSide?1. 8082 initializes SERVO, DSP & RISC registers2. Write RISC code to SDRAM3. Reset RISCSECTION 3. DVD & AMP PART3-22. T

45、est & debug flowTESTCheck the POWER PARTNoYesNoYesNoNoYesYesCheck the POWER PARTCheck the regulators or diode.1. Check 27MHz system clock.2. Check systemreset circuit.3. Check FLASH R/Wenable signal PRD, RWR.4. Check FLASH Memory related circuit.Check theAC Vol tagePower PCBA (110Vor 220V)Switch on

46、the Power PCBAIs theDC Voltageoutputs OK? (-41V, -22V, -26.5V, 12V, 5.6V, 3.3V, 5V, 7V, 32.5V)Are 3.3V and 5V DCoutputs normal on mainPCBA?UpdateFLASHsuccessfully?Replace FLASHA3-3AES8381Check the related circuit of ES8381 IC501 Pins133, 134, 137, 138, 139, 140Check the Tray control IO pins on ES838

47、1.Check the Tray control amplifyungcircuit IC401.Check connection lines between SDRAM(IC502) & ES8381 and the SDRAM is damaged. ES8381VIDEO outputsproperly?NormalOPEN_SW, CLOSE_SWsignal?3-4BMotor Driver DRV_MUTE pin is High?Motor Driver DRV_MUTE pin is High?SLED+ and SLED- output properly?Check the

48、connection line of DRV_MUTECheck the related circuit of SLEGNCheck Focus connection on ES8381 and motor driver.3-5CES8381.Check the laser power circuit on ES8381 and connecting to power transistor.(Q405, Q406)Collectorvoltage of powertransistor is OK?(Q405, Q406)ProperRF signal on ES8381ProperSPINDL

49、E signal on ES8381SPNP SPNN output properly?Check the related circuit on ES8381 RF signal.Check the RF connectionbetween IP9009 and ES8381.3-6DProper signals on A, B, C, D of ES8381Proper CD-DVDCT signal on ES8381Proper CD-DVDCT signal on ES8381ProperTRACK signal on ES8381TR+ & TR- output properly?C

50、heck CD_DVDCT connectionbetween IP9009 and ES8381Check the related circuit on ES8381 CD-DVDCTCheck connections betweenES8381 and pick-up head.Check the related circuit on ES8381.Check the TRACK connection on ES8381 and motor driver.3-7ECheck connection between IC601 BCK, LRCK, ADATAOCheck the relate