LG-LHW5100A-wht-sm 维修电路原理图.pdf

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1、- 1-1 -CONTENTS SECTION 1.GENERAL SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SPECIFICATIONS . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5 LOCATION OF CUSTOMER CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTINGGUIDE. . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . 2-1 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-

4、7 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 VOLTAGE SHEET (IC&TR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . .

5、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 SECTION 3.DVD PART ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING . . . . . . . . . . . . . . . . .3-8 DVD PART SCHEM

6、ATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21 VOLTAGE SHEET (IC & TR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27 PRINTED CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . .

7、 . . . . . . . . . . . . . . . . . . . . .3-29 SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 SECTION 6. SPEAKER PART . . . . . . . . . . . . . . .

8、 . . . . . . . . . . . . . . . . . . . . . .6-1 ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7 SHEMATICDIAGR

9、AMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15 PRINTED CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . .

10、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-17 SPEAKER EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

11、-35 RadioFans.CN 收音机爱 好者资料库- 1-2 -SECTION 1. GENERAL SERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport 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 o

12、r impact.2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) The 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 resu

13、lt may be an operational malfunction and/ordamage to the printed-circuit board.3) Each and every pick-up is already individually adjusted 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 ey

14、es!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the 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

15、 lens).The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cottonswab should be used, taking care 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

16、not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much ofthis alcohol on the swab, 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 exp

17、osed skin.MagnetHow to hold the pick-upConductive SheetCotton swabPressurePressureRadioFans.CN 收音机爱 好者资料库- 1-3 -NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode).These componentsare sensitive to, and ea

18、sily affected by, static electricity. If such static electricity is high voltage, componentscan be damaged, and for that reason components 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 rep

19、air or storage where the temperature of humidity is high, where strong magnet-ism is present, or where there is excessive dust.2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be g

20、rounded.3) The workbench should be covered with a conductive sheet and grounded.When removing the laser pick-up from its conductive bag, 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 sold

21、ering 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 come in contact with clothing, in order to prevent sta-tic electricity changes in the clothing to escape from the armband.7) The laser beam from the pick-up shoul

22、d NEVER be directly facing the eyes or bare skin.Resistor(1 Mohm)ConductiveSheetResistor(1 Mohm)Armband- 1-4 - ESD PRECAUTIONSElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostati

23、cally Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip components.The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.1. Immediately before handlin

24、g any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applyi

25、ng power to the unit under test.2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive sur-face such 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 E

26、SD devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static cangenerate electrical charges sufficient to damage ESD devices.5. Do not use freon-propelled chemicals.These can generate electrical charges sufficient to damage ESDdevices.6. Do n

27、ot remove a replacement ESD device from its protective package until immediately before you areready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing

28、the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which the device will by installed.CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALLOTHER SAFETY PRECAUTIONS.8. Minimize bodily moti

29、ons when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen-erate static electricity sufficient to damage an ESD device).CAUTION. GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH

30、APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, ISINTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DAN-GEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OFELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVI

31、CE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.- 1-5 - SPECIFICATIONS- 1-6 - LOCATION OF CUSTOMER CONTROLS FRONT PANELDISPLAY WINDOW- 1-7 -REAR PANEL- 1-8 -REMOTE CONTROL - 2-1 -SECTION 2. AUDIO PARTINSERTPOWER CORD.TURN ONTHE RED LED?IS POWER ON?CHECK POWER PLUGAN

32、D POWER SUPPLY CIRCUIT .DOES INITIALREAD WORK?DOES IT PLAY?YESNOYESYESOKNOYESNONOCHECK POWER SUPPLY CIRCUIT .CHECK LASER CIRCUIT .CHECK TRACKING SERVO CIRCUIT.TURN POWER ON.CHECK FOCUS CIRCUIT.CHECK DISC.DOES IT OUTPUTAUDIO?YESNOCHECK AUDIO CIRCUIT.ELECTRICAL TROUBLESHOOTING GUIDE- 2-2 -2. AUDIO .CO

33、M CIRCUIT- 2-3 -3. FRONT CIRCUIT (1/2)POWER ONTURN ONTHE GREEN LED?CHECK IF THE FRONT POWERIS OK(*2).IS DIGITRON ON NORMALLY?CHECK IFTHE HEADPHONEIS OK.YESNOYESNOYESREFER TO SMPS PART.CHECK IF THE REMOCONIS OK.YESCHECK IF THE PN101/PN102IS OK?RECONNECT IT.(REFER TO NOTICE *1).CHECK IFALL BUTTENSARE

34、OK.YESCHECK IFTHE VOLUME ISOK.YESFRONT B/D OK.YESCHECK IF THE VFD001 PINSARE OK.CHECK PATTERNAND RESOLDERING .NOYES*1: When it is needed to reconnect FPC cable into PN101/PN102,short ZD972 + and screw(chassis GND) near to ZD972.*2:PN101 PinsPIN2 : -23.0VPIN3 : -27.5VPIN4 : 5.0VPIN11 : -34.0VPIN20 :

35、12.0VNONO- 2-4 -4.FRONT CIRCUIT (2/2) - 3-1 -SECTION 3.DVD PART DVD TROUBLESHOOTING GUIDE1. Power check flowELECTRICAL TROUBLESHOOTING GUIDE- 3-2 -2.Test & debug flow- 3-3 - 3-4 - 3-5 - 3-6 - 3-7 - 3-8 - DETAILS AND W VEFORMS ON SYSTEM TESTAND DEBUGGING1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL1)

36、MT1379 main clock is at 27MHz(X501)2) MT1336 reset is high active- 3-9 -3) RS232 waveform during procedure(Downloading)4) Flash R/W enable signal during download(Downloading)- 3-10 -2. SDRAM CLOCK1) MT1379 main clock is at 27MHz(X501)3.TRAY OPEN/CLOSE SIGNAL1) Tray open/close waveform- 3-11 -2) Tray

37、 close waveform3) Tray open waveform- 3-12 -4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)- 3-13 -6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)7. DISC TYPE JUDGEMENT W VEFORM- 3-14 - 3-15 -8. FOCUS ON W VEFORM- 3-16 -9. SPINDLE CONTROL

38、W VEFORM (NO DISC CONDITION)- 3-17 -10.TRACKING CONTROL RELATED SIGNAL(System checking)- 3-18 -11. RF W VEFORM12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)- 3-19 -13. MT1379 VIDEO OUTPUT W VEFORM1) Full colorbar signal(CVBS)2) Y- 3-20 -3) C14. AUDIO OUTPUT FORM AUDIO DAC1) Audio related Signa

39、l- 6-1 -SECTION 6. SPEAKER PART ELECTRICAL TROUBLESHOOTING GUIDE- 6-2 - 6-3 - 6-4 - 6-5 - 6-6 -MEMO BLOCK DIAGRAM2-52-62-72-8 SCHEMATIC DIAGRAMS FRONT &POWER SCHEMATIC DIAGRAM2-92-10 MICOM SCHEMATIC DIAGRAM2-112-12 I/O SCHEMATIC DIAGRAM2-132-14 DAP SCHEMATIC DIAGRAM2-152-16 AMP SCHEMATIC DIAGRAM2-17

40、2-18 SMPS SCHEMATIC DIAGRAM2-192-20 WIRING DIAGRAM2-212-22 VOLTAGE SHEET (IC&TR) 2-232-242-252-26 PRINTED CIRCUIT DIAGRAMS MAIN P.C. BOARD (SOLDER SIDE)2-272-28 MAIN P.C. BOARD (COMPONENT SIDE)2-292-30 FRONT P.C. BOARD2-312-32 SMPS P.C. BOARD3-213-22 DVD PART SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRA

41、M3-233-24 SERVO SCHEMATIC DIAGRAM3-253-26 INTERFACE SCHEMATIC DIAGRAM3-273-28 VOLTAGE SHEET (IC&TR)3-293-30 PRINTED CIRCUIT DIAGRAM DVD P.C. BOARD(SOLDER SIDE)3-313-32 DVD P.C. BOARD (COMPONENT SIDE)4-14-2SECTION 4. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION351301268302303A46A41A26275266267A43270

42、272264265250260269305A47TUNER454454NOTE) Refer to “SECTION 6 REPLACEMENTPARTS LIST” in order to look for the part number of each part.4-34-4 DECK MECHANISM EXPLODED VIEWLOCA.NO.PART NO DESCRIPTION SPECIFICATIONA26 6721RJ0381A DECK ASSEMBLY,AUDIO DECK/MECHA DP-7A-HZA01 4861R-0016D CLAMP ASSEMBLY DECK

43、/MECHA DISC DP-7C(7A) -HZA02 3041R-M018A BASE ASSEMBLY MAIN DP-7A-HZA03 3041R-M016D BASE ASSEMBLY SLED DP-7A -HZ001 3300R-0547A PLATE CLAMP002 5016H-1016B MAGNET CLAMP(LDM-R608,10*5,1*1.5T)003 4860R-0021A CLAMP UPPER DP7004 4930R-0402A HOLDER CLAMP DP-7A010 6850R-GK12A CABLE,FLAT P=1.0 FFC UL2896(0.

44、05X0.65) 11011 3210R-M002A FRAME UP/DOWN MOLD DP7C011A 6850R-JW14B CABLE,FLAT P=1.0 FFC UL2896(0.035X0.7) 23012 5040R-0075B RUBBER DAMPER DP7 (CHUNG PUNG 30)012 5040R-0075D RUBBER DAMPER DP7 (YAMAUCHI 30)013 4400R-0006B BELT DECK/MECHA DP2-5, DP7C,DP7A OT014 4470R-0055A GEAR PULLEY015 6871RJ4415A PW

45、B(PCB) ASSEMBLY,JACK(AUDIO) PWB(PCB) TOTAL LOADING-HZ015A 4681R-1023G MOTOR ASSEMBLY DECK/MECHA LOADING-HZ015B 4560R-0008A PULLEY MOTOR015C 4680HP2001A MOTOR(MECH) RF-300CH-11440(SHAFT 6.05L)M/C015C 4680R-E009A MOTOR(MECH) FEEDING RF300EH-1D390 MABUCHI015C 4680R-E010A MOTOR(MECH) FEEDING BCZ3B51 SAN

46、KYO FOR DP7015C 4680HP2011A MOTOR(MECH) PC200DG-21651C JOHNSON LOADING017 4470R-0056A GEAR LOADING018 4974R-0023A GUIDE UP/DOWN020 3040R-D001A BASE MAIN MOLD DP-7AUDIO021 4680R-C011A MOTOR(MECH) SPINDLE JCL9B68 SANKYO FOR COM022 4681R-0034D MOTOR ASSEMBLY DECK/MECHA FEEDING DP-7C(7A) 0244470R-0131A

47、GEAR PINION DP7C024A 5006R-0044A CAP SKEW-T DP7C024B 5006R-0043A CAP SKEW DP7C025 4470R-0130A GEAR MIDDLE DP7C026 3390R-0012A TRAY DISC(DP-5RM MULTI)028 4370R-0082B SHAFT DECK/MECHA PU R DP-7C OTHER029 4370R-0082A SHAFT PU DP-7C030 4471R-0013D GEAR ASSEMBLY DECK/MECHA RACK DP-7C(7A) -HZ031 6716DPH00

48、5A PICK UP,DVD PVR-502W MITSUMI PLAYER H/HIGH429 1SZZR-0012A SCREW,DRAWING B-TITE430 1SZZH-1003A SCREW,DRAWING + D2.0 6MM SWRCH16A/NIY 4.5MM430 1SZZH-1003A SCREW,DRAWING + D2.0 6MM SWRCH16A/NIY 4.5MM431 1SZZH-1007B SCREW,DRAWING + D2.0 6MM SWRCH16A/ZNBK 4MM 1431 1SZZH-1007B SCREW,DRAWING + D2.0 6MM

49、SWRCH16A/ZNBK 4MM 1432 1SZZR-0023B SCREW,DRAWING + 1 D1.7 L6.0 SWRCH16A/FZY RAC433 1SZZR-0050A SCREW,DRAWING + 1 D2.0 L4.5 SWRCH16A/ZNY S-T435 1SZZR-0011A SCREW,DRAWING MACHINE6-76-8 BLOCK DIAGRAM6-96-10 SHEMATIC DIAGRAMS SCHEMATIC DIAGRAM (ACC-W5100)6-116-12 SCHEMATIC DIAGRAM (FA-W5100)6-136-14 SMP

50、S SCHEMATIC DIAGRAM (FA-W5100)6-156-16 WIRING DIAGRAM6-176-18 PRINTED CIRCUIT DIAGRAM ACC-W5100 P.C. BOARD6-196-20 FA-W5100SL/SR MAIN P.C. BOARD6-216-22 FA-W5100SL/SR SMPS P.C. BOARD6-236-24 SPEAKER EXPLODED VIEWS Center SpeakerMODEL: LHS-5100CV Satellite SpeakerMODEL: LHS-5100T857859856853854855858