LG-LHSW5100-wht-sm 电路图 维修手册.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 SCHE

6、MATIC 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 SHEMATICDIAG

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

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

11、6-35 RadioFans.CN 收音机爱 好者资料库 - 1-2 - SECTION 1. GENERAL SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) 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 pre

12、ssure or impact. 2. Repair notes 1) 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 and impact. If it is subjected to strong pressure or impac

13、t, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams ma

14、y 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 pick-up if it is damaged. 5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (suc

15、h as used for camera lens).The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab 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

16、to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. Storage in conductive bagDrop impact NEVER look directly at the laser beam, and dont let c

17、ontact fingers or other exposed skin. Magnet How to hold the pick-up Conductive Sheet Cotton swab Pressure Pressure RadioFans.CN 收音机爱 好者资料库 - 1-3 - NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode).Th

18、ese components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can 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. C

19、are must be taken, 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 for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipm

20、ent, 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, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4)

21、 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 come in contact with clothing, in order to prevent sta- tic electricity changes in the clothing to escape from

22、 the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband RadioFans.CN 收音机爱 好者资料库 - 1-4 - ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can

23、be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components.The following techniques should be used to help reduce t

24、he incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available disc

25、harging 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 ESD devices, place the assembly on a conductive sur- face such as aluminum foil, to prevent electrostatic charge buil

26、dup 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 can generate electrical charges sufficient to damage ESD devices. 5. Do not use fr

27、eon-propelled chemicals.These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted toget

28、her by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : BE SURE NO

29、 POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen

30、- erate static electricity sufficient to damage an ESD device). CAUTION. GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DAN- GEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO C

31、ONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. - 1-5 - SPECIFICATIONS - 1-6 - LOCATION OF CUSTOMER CONTROLS FRONT PANEL DISPLAY WINDOW - 1-7 - R

32、EAR PANEL - 1-8 - REMOTE CONTROL - 2-1 - SECTION 2. AUDIO PART INSERT POWER CORD. TURN ON THE RED LED? IS POWER ON? CHECK POWER PLUG AND POWER SUPPLY CIRCUIT . DOES INITIAL READ WORK? DOES IT PLAY? YES NO YES YES OK NO YES NO NO CHECK POWER SUPPLY CIRCUIT . CHECK LASER CIRCUIT . CHECK TRACKING SERVO

33、 CIRCUIT. TURN POWER ON. CHECK FOCUS CIRCUIT. CHECK DISC. DOES IT OUTPUT AUDIO? YES NO CHECK AUDIO CIRCUIT. ELECTRICAL TROUBLESHOOTING GUIDE - 2-2 - 2. AUDIO .COM CIRCUIT - 2-3 - 3. FRONT CIRCUIT (1/2) POWER ON TURN ON THE GREEN LED? CHECK IF THE FRONT POWER IS OK(*2). IS DIGITRON ON NORMALLY? CHECK

34、 IF THE HEADPHONE IS OK. YES NO YES NO YES REFER TO SMPS PART. CHECK IF THE REMOCON IS OK. YES CHECK IF THE PN101/PN102 IS OK? RECONNECT IT. (REFER TO NOTICE *1). CHECK IF ALL BUTTENS ARE OK. YES CHECK IF THE VOLUME IS OK. YES FRONT B/D OK. YES CHECK IF THE VFD001 PINS ARE OK. CHECK PATTERN AND RESO

35、LDERING . NO YES *1: When it is needed to reconnect FPC cable into PN101/PN102, short ZD972 + and screw(chassis GND) near to ZD972. *2:PN101 Pins PIN2 : -23.0V PIN3 : -27.5V PIN4 : 5.0V PIN11 : -34.0V PIN20 : 12.0V NO NO - 2-4 - 4.FRONT CIRCUIT (2/2) - 3-1 - SECTION 3.DVD PART DVD TROUBLESHOOTING GU

36、IDE 1. Power check flow ELECTRICAL 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 TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) MT1379 main clock is at 27MHz(X501) 2) MT1336 reset is high active -

37、 3-9 - 3) RS232 waveform during procedure(Downloading) 4) Flash R/W enable signal during download(Downloading) - 3-10 - 2. SDRAM CLOCK 1) MT1379 main clock is at 27MHz(X501) 3.TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform - 3-11 - 2) Tray close waveform 3) Tray open waveform - 3-12 - 4. SLED CO

38、NTROL 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 W VEFORM (NO DISC CONDITION) - 3-17 - 10.TR

39、ACKING CONTROL RELATED SIGNAL(System checking) - 3-18 - 11. RF W VEFORM 12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF) - 3-19 - 13. MT1379 VIDEO OUTPUT W VEFORM 1) Full colorbar signal(CVBS) 2) Y - 3-20 - 3) C 14. AUDIO OUTPUT FORM AUDIO DAC 1) Audio related Signal - 6-1 - SECTION 6. SPEAKER P

40、ART ELECTRICAL TROUBLESHOOTING GUIDE - 6-2 - - 6-3 - - 6-4 - - 6-5 - - 6-6 - MEMO BLOCK DIAGRAM 2-52-6 2-72-8 SCHEMATIC DIAGRAMS FRONT &POWER SCHEMATIC DIAGRAM 2-92-10 MICOM SCHEMATIC DIAGRAM 2-112-12 I/O SCHEMATIC DIAGRAM 2-132-14 DAP SCHEMATIC DIAGRAM 2-152-16 AMP SCHEMATIC DIAGRAM 2-172-18 SMPS S

41、CHEMATIC DIAGRAM 2-192-20 WIRING DIAGRAM 2-212-22 VOLTAGE SHEET (IC&TR) 2-232-24 2-252-26 PRINTED CIRCUIT DIAGRAMS MAIN P.C. BOARD (SOLDER SIDE) 2-272-28 MAIN P.C. BOARD (COMPONENT SIDE) 2-292-30 FRONT P.C. BOARD 2-312-32 SMPS P.C. BOARD 3-213-22 DVD PART SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRAM 3-

42、233-24 SERVO SCHEMATIC DIAGRAM 3-253-26 INTERFACE SCHEMATIC DIAGRAM 3-273-28 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) 4-14-2 SECTION 4. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION 351 301 268 302 303 A46 A41 A26 275

43、 266 267 A43 270 272 264 265 250 260 269 305 A47 TUNER 454 454 NOTE) Refer to “SECTION 6 REPLACEMENT PARTS LIST” in order to look for the part number of each part. 4-34-4 DECK MECHANISM EXPLODED VIEW LOCA.NO.PART NO DESCRIPTION SPECIFICATION A26 6721RJ0381A DECK ASSEMBLY,AUDIO DECK/MECHA DP-7A-HZ A0

44、1 4861R-0016D CLAMP ASSEMBLY DECK/MECHA DISC DP-7C(7A) -HZ A02 3041R-M018A BASE ASSEMBLY MAIN DP-7A-HZ A03 3041R-M016D BASE ASSEMBLY SLED DP-7A -HZ 001 3300R-0547A PLATE CLAMP 002 5016H-1016B MAGNET CLAMP(LDM-R608,10*5,1*1.5T) 003 4860R-0021A CLAMP UPPER DP7 004 4930R-0402A HOLDER CLAMP DP-7A 010 68

45、50R-GK12A CABLE,FLAT P=1.0 FFC UL2896(0.05X0.65) 11 011 3210R-M002A FRAME UP/DOWN MOLD DP7C 011A 6850R-JW14B CABLE,FLAT P=1.0 FFC UL2896(0.035X0.7) 23 012 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 OT

46、 014 4470R-0055A GEAR PULLEY 015 6871RJ4415A PWB(PCB) ASSEMBLY,JACK(AUDIO) PWB(PCB) TOTAL LOADING-HZ 015A 4681R-1023G MOTOR ASSEMBLY DECK/MECHA LOADING-HZ 015B 4560R-0008A PULLEY MOTOR 015C 4680HP2001A MOTOR(MECH) RF-300CH-11440(SHAFT 6.05L)M/C 015C 4680R-E009A MOTOR(MECH) FEEDING RF300EH-1D390 MABU

47、CHI 015C 4680R-E010A MOTOR(MECH) FEEDING BCZ3B51 SANKYO FOR DP7 015C 4680HP2011A MOTOR(MECH) PC200DG-21651C JOHNSON LOADING 017 4470R-0056A GEAR LOADING 018 4974R-0023A GUIDE UP/DOWN 020 3040R-D001A BASE MAIN MOLD DP-7AUDIO 021 4680R-C011A MOTOR(MECH) SPINDLE JCL9B68 SANKYO FOR COM 022 4681R-0034D M

48、OTOR ASSEMBLY DECK/MECHA FEEDING DP-7C(7A) 0244470R-0131A GEAR PINION DP7C 024A 5006R-0044A CAP SKEW-T DP7C 024B 5006R-0043A CAP SKEW DP7C 025 4470R-0130A GEAR MIDDLE DP7C 026 3390R-0012A TRAY DISC(DP-5RM MULTI) 028 4370R-0082B SHAFT DECK/MECHA PU R DP-7C OTHER 029 4370R-0082A SHAFT PU DP-7C 030 447

49、1R-0013D GEAR ASSEMBLY DECK/MECHA RACK DP-7C(7A) -HZ 031 6716DPH005A PICK UP,DVD PVR-502W MITSUMI PLAYER H/HIGH 429 1SZZR-0012A SCREW,DRAWING B-TITE 430 1SZZH-1003A SCREW,DRAWING + D2.0 6MM SWRCH16A/NIY 4.5MM 430 1SZZH-1003A SCREW,DRAWING + D2.0 6MM SWRCH16A/NIY 4.5MM 431 1SZZH-1007B SCREW,DRAWING + D2.0 6MM SWRCH16A/ZNBK 4MM 1 431 1SZZH-1007B SCREW,DRAWING + D2.0 6MM SWRCH16A/ZNBK 4MM 1 432 1SZZR-0023B SCREW,DRAWING + 1 D1.7 L6.0 SWRCH16A/FZY RAC 433 1SZZR