LG-DVD5353-cd-sm 电路图 维修手册.pdf

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1、3-433-44 2. POWER, A/V, FRONT P.C.BOARD LOCATION GUIDE RadioFans.CN 收音机爱 好者资料库 PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C.BOARD LOCATION GUIDE (TOP SIDE) (BOTTOM SIDE) 3-413-42 RadioFans.CN 收音机爱 好者资料库 1-3 CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, NEVER PERFORM CUSTOMIZED INSTALLATIONS WI

2、THOUT MANUFAC- TURERS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICIN

3、G GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTEC- TION FROM A.C. LINE SHOCK. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRCTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : F

4、IRE CONNECT A 1500 OHM 10 WATT RESIS- TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CON- DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVE

5、RSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT: GRAPHIC SYMBOLS

6、 THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG- NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN- G

7、LE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SUBJECT : X-RADIATION 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER- SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN- TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVE

8、RS IS THE PIC- TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA- TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC- TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR- CU

9、MSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR- ABLE LEVELS. 2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALL THEM. 3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH

10、VOLTAGE METER. THE CALIBRA TION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE AT YOUR DISTRIBUTOR. 4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR CHASSIS IS SERVICED.

11、 THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING CORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGA- NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU- LATIO

12、N IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE- DURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON EACH CUSTOMERS INVOICE. 5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HI

13、GH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES SIVE VOLTAGE. 6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED). SUBJECT: IMPLOSION 1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED

14、 WITH AN INTE GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT. 2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES. SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECES

15、S, CUBBY- HOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA- TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PALCEMENT WHERE DRAPERI

16、ES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC- ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER- CIAL MOUNTING KIT. MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A S

17、HELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING O

18、F A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ- ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS. 7. CAUT

19、ION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS

20、, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN- GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS A.C. VOLTMETER GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC PLACE THIS PROBE ON EACH EXPOSED METAL PART Radi

21、oFans.CN 收音机爱 好者资料库 1-4 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE : if unforeseen circum- stances create conflict between the following servicing pre- cautions and any of the saf

22、ety precautions in this publica- tions, always follow the safety precautions. Remembers Safety First: General Servicing Precautions 1. Always unplug the DVD AC power cord from the AC power source before: (1)Removing or reinstalling any component, circuit board, module, or any other assembly. (2)Disc

23、onnection or reconnecting any internal electrical plug 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 result in an explosion hazard. 2.

24、 Do not spray chemicals on or near this DVD or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless spec

25、ified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped. 5. Do not apply AC power to this DVD and/or any of its electrical assemblies unless all soli

26、d-state device heat sinks are cerrectly installed. 6. Always connect test instrument ground lead to the appropriate ground before connection the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from the AC

27、 outlet and turn the 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 includi

28、ng Metal pan- els, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are int

29、egrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor compo- nent or semiconductor-equipped assembly

30、, drain off any electrostatic charge on your body by touching a known earth 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 elect

31、rical 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 unsolder ES devices. 4. Use only an anti-static solder removal device.

32、 Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protec tive pa

33、ckage until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement

34、 ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices.

35、 (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static elec- tricity sufficient to damage an ES device.) 2-2 DISASSEMBLY CAUTION BEFORE STARTING SERVICING Electronic parts are susceptible to static electri

36、city and may easily and damaged, so do not forget to take a proper grounding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw driver in servicing. Several kinds of screws are used and some of them need specia

37、l cautions. That is, take care of the tapping screws securing molded parts and fine pitch screws used to secure metal parts. If they are used improperly, the screw holes will be easily damaged and the parts can not be fixed. (A) (A) (A) (A) (A) Top Case (A) (A) Tray Door Disc Tray Fig. 2-3 Stopper S

38、topper Stopper Front Panel OPTIONAL PART CABINET DISASSEMBLY 1. Top Case 1. Release 7 screws (A). (See Fig. 2-1) 2. Lift the top case with holding the back of it, and remove it in the direction of the arrow Fig. 2-1 Fig. 2-2 Fig. 2-3 3. Front Panel 1. Eject the disc tray. (See Fig. 2-2) 2. Remove th

39、e tray door. (See Fig. 2-2) 3. Pull the front panel toward you while pressing 7 stoppers to disengage, and remove the front panel. (See Fig. 2-3) 2.Tray Door 1.Eject the disc tray. 2.Lift up the tray door in the direction of the arrow. 2-3 OPTIONAL PART Interface Board Main Circu Board (B) (B) (B) (

40、B) (B) (B) (B) (B) (B) (B) (B) (C) Fig. 2-4 1. Disassembling of Main Circuit Board and Interface Board 1. Remove the top case.(See Fig. 2-1) 2. Remove 14 screw (B). 3. Remove the Deck from Main Circuit Board. 4. Remove Main Circuit Board from Interface Board. 5. Remove 2 screw (C). 6. Remove Interfa

41、ce Board from the chassis. CIRCUIT BOARD DISASSEMBLY Note: Before removing the main circuit board, be sure to shortcircuit the laserdiode output land. After replacing the main circuit board, open the land after inserting the flexible connector. (Refer to Mechanism Disassembly) 2. Power(SMPS) Block D

42、iagram 5V_D 5V_A -24VA F+ RECTIFIERLINE FIL TER SWITCHING TR TRANS FEED B. REG(8V) 8V 5.2VA F- RECTIFIER(FLD) RECTIFIER(9V) RECTIFIER(5.2V) LPF LPF RECTIFIER(14V)LPF 12VA AC90240V PWR ON/OFF REG(3.3V) REG(3.3V) 3.3V_M1 3.3V/3.3V_M DV5000s/DV6000s 3-14 3-15 8 SENS, FOK, SLD_FG, MSDAT0, DEFE CT,DSP_ S

43、ENSE IC2M1 KA3082 SpindleMotor, LoadingMotor, Actuator Driver CD: A,B,C,D / E, F 4 4 MIRR,TZC 8 5 3 3 SQSO, SQC K, SCORSCOR 6 XLAT, S_CLK, S_DATA UCOM I/F focus, tracking, loading, sled Spindle M/D PICK UP MCK IC206 HDC25D811 CD / DVD DSP DVD SERVO IC2A1 HD153702TF RF Signal Process or FDO,TDO,FMO L

44、oad open/close(loading control) UCOM I/F DVD: A,B,C,D, FE,TE,PI,SBADD 4 DVD/CD RF IC203 1M x 16bit SDRAM 16 9 ICADDR0:8 ICDATA 00:15 DO0:7 AO0:5 DVD_DATA0:7 MON,MDP SPINDLE_FG MPEG I/F 2 DSP_ CS, /WR, /RD3 8 DV5000s/DV6000s 3. RF/CD DSP/DVD DSP/DVD SERVO Block Diagram 4. Audio Block Diagram IC401 CS

45、4932 Audio DAC IC402 LPF & Buffer Buffer Buffer Buffer KA 5532 OP AMP DAC_RST S_DATA S_CLK DAC_L0 DA_LRCK DA_DATA0 DA_BCK DA_XCK FL FR RL RR WOOFER CENTER L R U-COM I/F IC452 LPF & KA5532 OP AMP IC453 LPF & KA 5532 OP AMP IC454 LPF & KA 5532 OP AMP IC451 PCM1603KY Aud io DAC (5.1CH) FL FR RL RR WOOF

46、ER CENTER L R A/V JACK I/F DAC_RST S_DATA S_CLK DAC_L1 DA_LRCK DA_DATA1:3 DA_BCK DA_XCK MPEG I/F MPEG I/F U-COM I/F DV5000s/DV6000s 3-16 3-17 5. MPEG & MEMORY Block Diagram IC501 PANTERA-2 LE/PLUS IC301 XC9572VL CPLD I/O PORT 72 IC304 SDRAM 16/32BIT 64M IC502 93C46 EEPROM IC3F1 FLASH MEMORY AD0:78 D

47、SP I/F DVD0:7 8 LA 0:3 4 SCLK,SDATA SQCK,SQS0 REQP SDCLK1,PSYNC DSP_ INT SENSE /DSP_ CS AD 04 : 21 RF & MOTOR I/F MIRR LDON SCLK,S DATA EE_CS F_IN 32 MD00:31 MCLK2 CKE MA00:10 MA12,13 /CS0 /RAS/ /CAS /WE /DQM0:3 SPINDLE_FG ALE AD04:19 16 LADD04:19 16 LA 0:3 4 AD00:15 16 AUDIO I/F DA_DATA0:3 DA_BCK,D

48、A_LRCK,DA_XCK 4 DAC_L0,DAC_L1 DAC_RST A/V JACK I/F C/R(B) CVBS/G(R) Y/B(G) CVBS V_MUTE,16:9 ZISENB /RD /PWED IC301 DV5000s/DV6000s 6. KARAOKE Block Diagram(KARAOKE MODEL ONLY) 3-18 Microphone1 Microphone Signal PREAMP (BA3308) AMP (KIA4558) AUDIO ADC (CS5331) DVD DSP (P-Processor) MPEG (NS) AUDIO DA

49、C (CS4392) Microphone1 1 The unit turns to KARAOKE MODE with ou-screen lyrics display and melody sound when it play backs VCD or DVD KARAOKE DISC. 2. IF a microphone is connected at this time, MICON recoguizes the connection and prepares the compo- sition of external voice and internal melody. 3. The week signal of the microphone is converted to the digital signal after voice output that has passed through PREAMP(BA3308) and AMP(KIA4558) passes through(CS5331) that is Audio ADC(Analog to Digital convertor). 4. This digital signal enters NS that is MPEG IC and is adde