LG-DV7811E6S-cd-sm 电路图 维修手册.pdf

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1、DVD VIDEO PLAYER SERVICE MANUAL MODELS : DVD6054/DVD6184 (DV7511E6S/DV7811E6S) MODELS : DVD6054/DVD6184(DV7511E6S/DV7811E6S)SERVICE MANUAL P/NO : 3829RHP017A SEPTEMBER, 2003 Printed in Korea CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETYPRECAUTIONS” IN THIS MANUAL. DVD6054DVD6184 RadioFans.CN 收

2、音机爱 好者资料库 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-2 SERVICING PRECAUTIONS. 1-3 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECIFICATIONS. 1-4 RadioFans.CN 收音机爱 好者资料库 1-2 IMPORTANT SAFETY NOTICE This man

3、ual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics Corporation. All components should be replaced only with types identical to

4、those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs. Special components are also used to prevent x-radiation, shock and fire haz- ard. These components are indicated by the letter “x” included in their compo- nen

5、t designators and are required to maintain safe performance. No deviations are allowed without prior approval by LG Electronics Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and performance improvement changes into t

6、he set is not delayed until the new service literature is printed. CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturers approval. Unauthorized modi- fications will not only void the warranty, but may lead to property damage or user i

7、njury. Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines. GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature.

8、 The lightning flash with arrowhead symbol within an equilateral tri- angle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magni- tude to constitute a risk of electric shock. The pictorial representation of a fuse and its rati

9、ng within an equi- lateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE. SERVICE INFORMATION While servicing, use

10、 an isolation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the fol- lowing: FIRE AND SHOCK HAZARD 1. Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important o

11、n items trans-ported to and from the repair shop. 2. Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has

12、not been defeated. 3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign par- ticles. 4. Check for physical evidence of damage or deterioration to parts and compo- nents, for frayed leads or damaged ins

13、ulation (including the AC cord), and replace if necessary. 5. No lead or component should touch a high current device or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided. 6. After reassembly of the set, always perform an AC leakage test on all exposed

14、 metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS- FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity i

15、n the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metal- lic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd ca

16、pacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti- tutes a potential shock hazard and must be cor

17、rected immediately. TIPS ON PROPER INSTALLATION 1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a 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 f

18、actor, near steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation. 4. Wall- and shelf-mounted installations using a commercial moun

19、ting kit must follow the factory-approved mounting instructions. A product mounted to a shelf 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. Perf

20、orm leakage tests on customized installations. 5. Caution customers against mounting a product on a sloping shelf or in a tilt- ed position, unless the receiver is properly secured. 6. A product on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of

21、 trying to roll a cart with small cast- ers across thresholds or deep pile carpets. 7. Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous conse- quences to home and family. A.C. Voltmeter 1500 OHM 10 WATT Place

22、 this probe on each exposed metal part. Good Earth Ground such as the Water Pipe, Conduit, etc. 0.15uF PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS RadioFans.CN 收音机爱 好者资料库 1-3 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service data and its supplements and adde

23、nds, 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, always follow the safety precautions. Remembers Safety First: General Servicing Precautions 1. Alw

24、ays 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 electrical plug or other electrical connection. (3)Connecting a test substitute in parallel with an

25、 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 DVD or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical

26、 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, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with

27、 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 installed. 6. Always connect test instrument ground lead to the appropriate ground before connecti

28、on 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 an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resis- ta

29、nce 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, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices

30、 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 transistors and semiconductor chip components. The following techniques should be used to help redu

31、ce 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 your body by touching a known earth ground. Alternatively, obtain and wear a commer- cially availa

32、ble 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, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge

33、 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 classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use

34、 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 ready to install it. (Most replacement ES devices are packaged with leads electrically shorted toge

35、ther 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 material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no

36、 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 brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gene

37、rate static elec- tricity sufficient to damage an ES device.) 1-4 SPECIFICATIONS GENERAL Power requirementsAC 120V, 60Hz Power consumption14W Dimensions(approx.)430 x 43 x 242mm (W/h/d) Weight(approx.)2.34kg Operating temperature5C to 35C (41F to 95F) Operating humidity5% to 90% SYSTEM LaserSemicond

38、uctor laser, wavelength 650nm Signal systemPAL/NTSC Frequency responseDVD (PCM 96kHz): 8Hz to 44kHz DVD (PCM 48kHz): 2Hz to 22kHz CD: 8Hz to 20kHz Signal-to-noise ratioMore than 100dB (ANALOG OUT connectors only) Harmonic distortionLess than 0.008% Dynamic rangeMore than 100dB(DVD) More than 95dB(CD

39、) OUTPUTS VIDEO OUT1 V (p-p) 75 , sync negative, RCA jack x 1 (TO TV) Audio output (digital audio)0.5 V (p-p), 75 , RCA jack x 1 Audio output (analog audio)2.0 Vrms (1 kHz, 0 dB), 600 , RCA jack (L, R) x 1 (TO TV) 2-1 SECTION 2 CABINET & MAIN CHASSIS CONTENTS 1. EXPLODED VIEWS.2-2 1. Cabinet and Mai

40、n Frame Section.2-2 2. Packing Accessory Section.2-5 2-2 EXPLODED VIEWS 1. Cabinet and Main Frame Section 463 463 250 A00 463 463 300 283 280 A42 A49 A47 A48 A44 A43 A46 260 261 261 463 320 463 467 463 465 452 SCART&5.1CH MODEL ONLY OPTIONAL PART A 5 4 3 2 1 BCD 2-3 Cabinet and Main Frame Section Ca

41、binet and Main Frame Section Part List SALLOCA.NOPART NO(LG)ABDESCRIPTIONSPECIFICATIONREMARKS ASSEMBLY PARTS SECTION A426871R-5725AOPWB(PCB) ASSEMBLY,TOTALDV7000S 5TOOL KEY SH A426871R-5728AOPWB(PCB) ASSEMBLY,TOTALDV7000S 8TOOL KEY SH A433501RF3007COBOARD ASSEMBLYDVD DV7811E4M HA3GLL A433501RF6694FO

42、BOARD ASSEMBLYDVD DV7511E6L HA8PLL A443141R-D003FOCHASSIS ASSEMBLYDV7510E LSI,MTK 55MMNSP A443141R-D004FOCHASSIS ASSEMBLYDV7810E MTK 43MM A466885R-1015DOSUB PWB(PCB) ASSEMBLYDV7511E6S HA8PLL A466885R-1015JOSUB PWB(PCB) ASSEMBLYDV7811E6S HA8PLL A476871R-7604COPWB(PCB) ASSEMBLY,TOTALDV7000S SMPS SH 22

43、0V(CE) A476871R-7604DOPWB(PCB) ASSEMBLY,TOTALDV7000S LSI SMPS SH 220V (CE) A486871R-7601COOPWB(PCB) ASSEMBLY,TOTALDV7000S MTK SH SCART A496871R-5715AOPWB(PCB) ASSEMBLY,TOTALDV7000S 5TOOL TIMER SH A496871R-5718AOPWB(PCB) ASSEMBLY,TOTALDV7000S 8TOOL TIMER SH PARTS SECTION 2503110R-D001AOCASEDV7000 PRE

44、SS 430-55(A288G) 2503110R-D004AOCASEDV7000 PRESS 43MM A288G 2603140R-D002AOOCHASSISDV7000 PRESS MAINNSP 2615040R-0069DOORUBBERFOOT(SILICONE SPONGE DS-08 T= 2803721R-F306FOPANEL ASSEMBLY,FRONTNORMAL PADV7511E6L HA8PLLNSP 2803721R-F318COPANEL ASSEMBLY,FRONTNORMAL PADV7811E4M HA3GLLNSP 2833581R-T068BOD

45、OOR ASSEMBLYTRAY DV7500 (CHINA) 2833581R-T069AODOOR ASSEMBLYTRAY DV7800 (SPRAY) 3006410RCHX03AOOPOWER CORDCE-503/JL201B H03VVH2-F 2X0.75 3203720R-D072FOPANEL,VIDEODVD DV7510E PRESS LSI,MTK 55MM 3203720R-D074FOPANEL,VIDEODVD DV7810E PRESS MTK 43MM SCREW 452353-051AOSCREWSPECIAL 452353-051AOSCREWSPECI

46、AL 463353-051GOOSCREW,DRAWING+ 2 D3.0 L8.0 MSWR3/FN TB ROUN 465353-046KOOSCREWSPECIAL (3X10 B.K) 467353-046NOOSCREW,DRAWINGSPECIAL(3X8 BK.) MODELS:(A)DV7511E6S(DVD6054) (B)DV7811E6S(DVD6184) 3. Packing Accessory Section BATTERY808 PACKING SHEET804 PACKING OPTIONAL PARTS 803 806 OWNERS MANUAL CABLE D

47、IN 810CABLE ASSY 801 REMOCON900 BOX CARTON802 PACKING803 811 812 PLUG ASSY 1WAY(YELLOW) PLUG ASSY 2WAY 2-4 Packing Accessory Section Part List SALLOCA.NOPART NO(LG)ABDESCRIPTIONSPECIFICATIONREMARKS 8013835RS0063WOINSTRUCTION ASSEMBLYDVD DV7511E6S HA8PLL 8013835RS0064AOINSTRUCTION ASSEMBLYDVD DV7811E

48、6S HA8PLL 8023890R-H803LOOBOXDV7511E6M HA8PLL SWW3-A 0.870 8033920R-E066AOOPACKING,CASINGDV7000 0.02 68 EPS 10 1165 238 804292-053BOOBAGSOFT(MIDI)NSP 808841-0021OOBATTERY,MNER03X HI WATT 1.5V .MA/H AAA 8106851RP0003NOOCABLE ASSY,RFDVD CABLE ASSY,RCA USING AREA 8116611R1G001AOOPLUG ASSY1WAY YELLOW GLOBAL 8126611R2G001AOOPLUG ASSY2WAY RED/WHITE GLOBAL 90067