LG-LDA511-dvd-sm 电路图 维修手册.pdf

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1、DVD VIDEO PLAYER SERVICE MANUAL MODEL : DF599X(DF9912EH) MODEL : DF599X(DF9912EH)SERVICE MANUAL P/NO : 3829RHP040R MARCH,2005 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETYPRECAUTIONS” IN THIS MANUAL. RadioFans.CN 收音机爱 好者资料库 CONTENTS SECTION 1 . . . .SUMMARY SECTION 2 . . . .CABINET CONNECT A 1

2、500 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. REVERSE THE A.C. PL

3、UG 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 THE LIGHTNING

4、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- GLE IS INTENDED

5、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. RECEIVERS IS THE PIC-

6、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- CUMSTANCES, MAY P

7、RODUCE 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 VOLTAGE METER.

8、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. THE BRIGHTNESS

9、 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- LATION IS ALWAYS CHE

10、CKED 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 HIGH VOLTAGE SUPP

11、LY. 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 WITH AN INTE G

12、RAL 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 RECESS, CUBBY- HOLE

13、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 DRAPERIES MAY OBSTRUCT

14、 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 SHELF OR PLATFOR

15、M 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 OF A PRODUCT ON

16、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. CAUTION CUSTOMERS A

17、GAINST 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, EXPLAIN THAT

18、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 1-4 SERVICING PRECA

19、UTIONS 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 safety precautions in this publica- tions,

20、 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)Disconnection or reconnecting any internal

21、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. Do not spray chemicals on or near this

22、 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 specified otherwise in this service data, l

23、ubrication 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 solid-state device heat sinks are cerrectly

24、 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 outlet and turn the power on. Connect

25、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, Ear

26、phone 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 integrated circuits and some field effect

27、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, drain off any electrostatic charge on

28、 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 electrical assembly equipped with ES devices

29、, 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. Some solder removal devices not classi

30、fied 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 package until immediately before you are

31、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 ES device, touch the protective materi

32、al 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. (Normally harmless motion such as the

33、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.) 1-5 SPECIFICATIONS GENERAL Power requirements: AC 110-240 V , 50/60 Hz Power consumption: 8W Dimensions (Approx.):430 x 35 x 242 mm (W x H

34、x D) without foot Weight (Approx.): 1.9 kg Operating temperature:5 C to 35 C (41 F to 95 F) Operating humidity: 5 % to 90 % OUTPUTS VIDEO OUT:1 Vp-p 75 , sync negative, RCA jack x 1 / SCART (TO TV) COMPONENT VIDEO OUT:(Y) 1.0 V (p-p), 75 ,negative sync, RCA jack x 1 (Pb)/(Pr) 0.7 V (p-p), 75 , RCA j

35、ack x 2 AUDIO OUT:2.0 Vrms (1 KHz, 0 dB), 600 , RCA jack (L, R) x 1 / SCART (TO TV) DIGITAL OUT (COAXIAL):0.5 V (p-p), 75 , RCA jack x 1 SYSTEM Laser:Semiconductor laser, wavelength 650 nm Signal system: PAL / NTSC Frequency response:DVD (PCM 96 kHz): 8 Hz to 44 kHz DVD (PCM 48 kHz): 8 Hz to 22 kHz

36、CD: 8 Hz to 20 kHz Signal-to-noise ratio:More than 100 dB (ANALOG OUT connectors only) Harmonic distortion: Less than 0.008% Dynamic range:More than 95 dB (DVD/CD) ACCESSORIES Remote control (1), Batteries (2) 2-1 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS.2-2 1. Cabinet and Main Frame

37、 Section.2-2 2. Deck Mechanism Section(DPS-02).2-3 3. Packing Accessory Section.2-4 2-2 EXPLODED VIEWS 1. Cabinet and Main Frame Section 463 A00 463 463 250 463 463 A48 I/O,JACK Model ONLY A47 A46 463 465 A44 260 261 280 276 A43 A50 452 452 261 467 320 300 A45 274 A 5 4 3 2 1 BCD 2. Deck Mechanism S

38、ection(DPS-02) 2-3 033 031 034 035 007 007 433 432 432 006 032 431 431 005 431 110 112 114 111 115 113 020 021 A02 A03 109 A01 A00 2-4 3. Packing Accessory Section BATTERY808 PACKING SHEET804 PACKING OPTIONAL PARTS 803 806 820 OWNERS MANUAL RF CABLE 810 CABLE SET ASSY 801 REMOCON900 BOX CARTON802 PA

39、CKING803 811 812 PLUG ASSY 1WAY(YELLOW) PLUG ASSY 1WAY(BLACK) PLUG ASSY 2WAY AC ADAPTOR830 3-1 SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE.3-2 1. Power check flow.3-2 2. System operation flow .3-3 3. Test & debug flow.3-4 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING.3-10 1.

40、SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL.3-10 2. SDRAM CLOCK.3-12 3. LOADING CONTROL RELATED SIGNAL.3-12 4. SLED CONTROL RELATED SIGNAL(NO DISC CONDITION).3-13 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION).3-13 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION).3-14 7. DISC TYPE JUDGEME

41、NT WAVEFORM.3-14 8. FOCUS ON WAVEFORM.3-16 9. SPINDLE CONTROL WAVEFORM(NO DISC CONDITION.3-17 10. TRACKING CONTROL RELATED SIGNAL(System checking).3-18 11. MT1389B AUDIO OPTICAL AND COAXIAL OUTPUT (SPDIF).3-19 12. MT1389B VIDEO OUTPUT WAVEFORM.3-19 13. MT1389B AUDIO OUTPUT TO AUDIO DAC.3-20 14. AUDIO OUTPUT FROM AUDIO DAC .3-21 15. MEMORY SLOT DATA SIGNAL.3-21 16. MEMORY SLOT DATA SIGNAL.3-21 17. MEMORY CLOCK & RESET SIGNAL.3-22 BLOCK DIAGRAMS.3-23 1. Overall Block Diagram .3-23 2. Power(SMPS) Block Diagram.3-24 3. SERVO Block Diagram.