LG-J10HD-hts-sm 电路图 维修手册.pdf

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1、2.1CH HOME THEATER SYSTEM SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. SERVICE MANUAL Website Internal Use Only P/NO : AFN32759823 SEPTEMBER, 2007 MODELS: J10HD-D/J10HD SPEAKERS: J10HD-SF/J10HD-SA MODELS: J10HD-D/J10HD (J10HD-SF/J10HD-SA) RadioFans.

2、CN 收音机爱 好者资料库 CONTENTS SECTION 1.SUMMARY SECTION 2.ELECTRICAL SECTION 3.CABINET & MAIN CHASSIS SECTION 4.REPLACEMENT PARTS LIST Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only RadioFans.CN 收音机爱 好者资料库 1-2 SECTION 1 SUMMARY CONTENTS

3、PRODUCT SAFETY SERVICING GUIDELINES FOR HOME THEATER SYSTEM PRODUCTS.1-3 SERVICING PRECAUTIONS.1-4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE (ES) DEVICES SERVICE INFORMATION FOR EEPROM.1-5 SPECIFICATIONS.1-6 Copyright 2007 LG Electronics. Inc. All right

4、reserved. Only for training and service purposes LGE Internal Use Only RadioFans.CN 收音机爱 好者资料库 1-3 PRODUCT SAFETY SERVICING GUIDELINES FOR HOME THEATER SYSTEM PRODUCTS IMPORTANT SAFETYNOTICE This manual was prepared for use only by properly trained audio-video service tech- nicians. When servicing t

5、his product, under no circumstances should the original design be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layou

6、t upon completion of repairs. Special components are also used to prevent x-radiation, shock and fire hazard. These components are indicated by the letter “x” included in their component desig- nators and are required to maintain safe performance. No deviations are allowed without prior approval by

7、LG Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, imple- mentation of the latest safety and performance improvement changes into the set is not delayed until the new service literature is printed. CAUTION: Do not attempt to modify this product in any wa

8、y. Never perform cus- tomized installations without manufacturers approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guide

9、lines. GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service lit- erature. The lightning flash with arrowhead symbol within an equilateral trian- gle is intended to alert the service personnel to

10、 the presence of non- insulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating within an equilater- al triangle is intended to convey to the service personnel the following fuse replacement caution

11、 notice: CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RAT- ING AS MARKED NEAR EACH FUSE. SERVICE INFORMATION While servicing, use an isolation transformer for protection from AC line shock. After the original service problem has been corrected, ma

12、ke a check of the following: FIRE AND SHOCK HAZARD 1. Be sure that all components are positioned to avoid a possibility of adjacent com- ponent shorts. This is especially important on items trans-ported to and from the repair shop. 2. Verify that all protective devices such as insulators, barriers,

13、covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the orig- inal design. Be sure that the safety purpose of the polarized line plug has not been defeated. 3. Soldering must be inspected to discover possible cold solder joints, solder splash- es, or sha

14、rp solder points. Be certain to remove all loose foreign particles. 4. Check for physical evidence of damage or deterioration to parts and components, for frayed leads or damaged insulation (including the AC cord), and replace if nec- essary. 5. No lead or component should touch a high current devic

15、e 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 metallic parts of the cabinet (the channel selector knobs, antenna terminals, han- dle and screws) to be sure that

16、set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between

17、 a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed meta

18、llic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a poten- tial shock hazard and must be corrected immediately. TIPS ON PROPER INSTALLATION 1. Never install any receiver in a closed-in recess, cubbyhole, or clo

19、sely 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 factor, near steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies may obstruct vent

20、ing. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventila- tion. 4. Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. Aproduct mounted to a shelf or plat- form must reta

21、in 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 tests on customized installations. 5. Caution customers against mounting a product on a sloping shelf o

22、r in a tilted posi- tion, unless the receiver is properly secured. 6. Aproduct on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets. 7. Caution customers against using

23、 extension cords. Explain that a forest of exten- sions, sprouting from a single outlet, can lead to disastrous consequences to home and family. Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1-4 SERVICING PRECAUTIONS CAUTION: Bef

24、ore servicing the HOME THEATER SYSTEM covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety pre- cautions in this publications, always f

25、ollow the safety pre- cautions. Remember Safety First : General Servicing Precautions 1.Always unplug the HOME THEATER SYSTEM AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any other assembly. (2) Disconnecting or reconnecting any

26、 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 polari- ty installation of electrolytic capacitors may result in an explosion hazard. 2.Do not spray chemicals on

27、or near this HOME THEATER SYSTEM or any of its assemblies. 3.Unless specified otherwise in this service data, clean elec- trical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified othe

28、rwise 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 HOME THEATER SYSTEM and / or any of its electrical assemblies unless al

29、l solidstate device heat sinks are correctly installed. 6.Always connect the test instrument ground lead to an appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from

30、 the AC outlet and turn the power on. Connect an insulation resistance meter (500V) to the blades of the attachment plug. The insulation resist- ance between each blade of the attachment plug and acces- sible conductive parts (Note 1) should be more than 1Mohm. Note 1 : Accessible Conductive Parts i

31、nclude Metal panels, 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 in

32、tegrated 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

33、, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercial- ly 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 electr

34、ical 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 grounded-tip soldering iron to solder or unsol- der ES devices. 4.Use only an anti-static solder removal device.

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

36、 package 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 replacemen

37、t 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 cir- cuit, and observe all other safety precautions. 8.Minimize bodily motions when handling unpackaged replacement ES devices

38、. (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.) Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE

39、Internal Use Only 1-5 SERVICE INFORMATION FOR EEPROM 1. Press the CLEAR button on the remote control together with STOP button on the front panel about 6 sec. The picture on OSD will be as bellow : * Refer to page 4-1 2. To MOVE from OP1 (Option 1) to another option, pressbutton on the remote contro

40、l. 3. To CHANGE the option code, pressbutton on the remote control. 4. To APPLY the option code, after change the option press ENTER button on remote control. 5. OSD “Write OK”. 6. To INITIALIZE the system, press CLEAR button on the remote control together with STOP button on the front panel about 6

41、 sec. 7. To exit from the option code menu without initialize the system, just turn off the power and then turn on again. OP1 : 0000000000MASK : 30 OP2 : 0000000000E : FF (OR) OP3 : 0000000000D39 OP4 : 0000000000 OP5 : 0000000000 OP6 : 0000000000 OP7 : 0000000000 OP8 : 0000000000EXIT : OP9 : 0000000

42、000MOVE : OPA : 0000000000E D I T Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1-6 SPECIFICATIONS GENERAL Dimensions (approx.)326 X 215 X 78mm (w x h x d) without foot Mass (approx.)3.1kg Operating temperature5C to 35C Operating

43、 humidity5% to 90% Audio recording format Sampling frequency44.1kHz Compression formatMP3 Sampling bitrate128Kbps RECORDING Recordable mediaHDD (80GB) PLAYBACK Frequency responseDVD (PCM 48kHz) : 20Hz to 20kHz, CD : 20Hz to 20kHz DVD (PCM 96kHz) : 20Hz to 44kHz Signal-to-noise ratioMore than 85dB (S

44、PEAKER OUT) Harmonic distortionLess than 0.007% (SPEAKER OUT) Dynamic rangeMore than 85dB (SPEAKER OUT) INPUTS Audio input (optical audio)3V (p-p), 75, Optical connector x 1 VIDEO IN1.0Vp-p 75ohms, sync negative, SCART x 1 AUDIO IN0dBm more than 47kohms, RCA jack (L, R) x 1 / SCART x 1 OUTPUTS VIDEO

45、 OUT1Vp-p 75, sync negative, RCA jack x 1 / SCART x 1 COMPONENT VIDEO OUT(Y) 1.0V (p-p), 75, negative sync, RCA jack x 1 (Pb) / (Pr) 0.7V (p-p), 75, RCA jack x 2 HDMI video / audio output19pin (HDMI standard, Type A) AMPLIFIER Output powerFront : 75W + 75W (4 at 1kHz, THD 10%) Subwoofer : 150W (3 at

46、 60Hz, THD 10%) TUNER SPECIFICATIONS Tuning Range (FM)87.5 - 108MHz Intermediate Frequency (FM)10.7MHz Signal-to-noise ratio60dB(Mono) Tuning Range (AM)522 - 1,611kHz Intermediate Frequency (AM)450kHz AntennaWire antenna (FM) Loop antenna (AM) SPEAKERS Front (J10HD-SF)Active Subwoofer (J10HD-SA) Typ

47、e :2 Way 3 SpeakerPower requirements :AC 200 - 240V, 50/60Hz Impedance :4Power consumption : 75W Frequency Response :100 - 20,000HzType : 1 Way 1 Speaker Sound Pressure Level :82dB/W (1m)Impedance : 3 Max. Input Power :150WFrequency Response : 65 - 1,500Hz Net Dimensions (WxHxD) : 104 x 328 x 21mmSo

48、und Pressure Level : 80dB/W (1m) Net Weight :2.9kgMax. Input Power : 300W Net Dimensions (WxHxD) : 216x 328 x 317mm Net Weight : 8.3kg Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 2-1 SECTION 2 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE.2-2 1. SMPS TROUBLESHOOTING FLOW .2-2 2. DC/DC TROUBLESHOOTING FLOW.2-5 3. AMP PROTECTION.2-8 WAVEFORMS.