LG-BD370-br-sm 电路图 维修手册.pdf

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1、P/NO : AFN70285080 FEB, 2009 BLU-RAY DISC PLAYER SERVICE MANUAL MODEL : BD370 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. Website Internal Use Only MODEL : BD370SERVICE MANUAL Av. Sor Juana lns de la Cruz No 555 Col. San Lorenzo Tlalnepantla, Estado de Mxico CP 5

2、4033 Tel. 321 19 00 Fax. 5 657549 Lada sin costo 01 800 50 481 00 RadioFans.CN 收音机爱 好者资料库 1-1Copyright 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only CONTENTS SECTION 1 .SUMMARY SECTION 2 .CABINET & MAIN CHASSIS SECTION 3 .ELECTRICAL SECTIO

3、N 4 .HL-04P LOADER PART SECTION 5 .REPLACEMENT PARTS LIST RadioFans.CN 收音机爱 好者资料库 1-2Copyright 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR BLU-RAY DISC PLAYER PRODUCTS. 1

4、-3 SERVICING PRECAUTIONS .1-4 General ServicinG PrecautionS inSulation checkinG Prodedure electroStatically SenSitive (eS) deviceS SOFTWARE UPGRADE . 1-5 SPECIFICATIONS .1-6 RadioFans.CN 收音机爱 好者资料库 1-3Copyright 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE

5、Internal Use Only PRODUCT SAFETY SERVICING GUIDELINES FOR BLU-RAY DISC PLAYER PRODUCTS IMPORTANT SAFETY NOTICE this manual 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 alte

6、red 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 layout upon completion of repairs. Special components are also used to prevent x-radiat

7、ion, shock and fire hazard. these components are indicated by the letter “x” included in their component des- ignators and are required to maintain safe performance. no deviations are allowed without prior approval by lG corporation. circuit diagrams may occasionally differ from the actual circuit u

8、sed. this way, implementation 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 way. never perform cus- tomized installations without manufacturers approval. unautho

9、rized 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 guidelines. GRAPHIC SYMBOLS the exclamation point within an equilateral triangle is inte

10、nded to alert the service personnel to important safety information in the service literature. the lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude t

11、o constitute a risk of electric shock. the pictorial representation of a fuse and its rating 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

12、the SaMe tyPe and ratinG 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, make a check of the following: FIRE AND SHOCK HAZARD 1. Be sure that all components are posit

13、ioned to avoid a possibility of adjacent component 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, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled

14、 per the original 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 splashes, or sharp solder points. Be certain to remove all loose foreign par- ticles. 4. check for physical evide

15、nce of damage or deterioration to parts and compo- nents, for frayed leads or damaged insulation (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

16、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, handle and screws) to be sure that set is safe to operate without danger of electrical shock. do not uSe a line iSolation tranSForMe

17、r 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 a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a ti

18、me. Measure the ac volt- age 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 measure- ments for each exposed metallic part. voltage measured must not exceed 0.75 volts rMS. this corresponds to 0.5 milliamp

19、ac. any value exceeding this limit constitutes a potential shock hazard and must be corrected 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.

20、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 venting. the customer should also avoid the use of decorative scarves or other coverings that might

21、 obstruct ventilation. 4. Wall- and shelf-mounted installations using a commercial mounting 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

22、the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized instal- lations. 5. caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured. 6. a product on a roll-about ca

23、rt 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 extension cords. explain that a forest of exten- sions, sprouting from a single outlet, can lead

24、 to disastrous consequences to home and family. 1-4Copyright 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SERVICING PRECAUTIONS caution: Before servicing the Blu-ray diSc Player cov- ered by this service data and its supplements and adden

25、ds, read and follow the SaFety PrecautionS. note: if unforeseen circumstances create conflict between the follow- ing servicing precautions and any of the safety precautions in this publications, always follow the safety precautions. remember Safety First : General Servicing Precautions 1. always un

26、plug the Blu-ray diSc Player 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 internal electrical plug or other electrical connection. (3) connecting a test substitute in par

27、allel with an electro- lytic capacitor. Caution : a wrong part substitution or incorrect polar- ity installation of electrolytic capacitors may result in an explosion hazard. 2. do not spray chemicals on or near this Blu-ray diSc Player or any of its assemblies. 3. unless specified otherwise in this

28、 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 otherwise in this service data, lubrication of contacts is not required. 4. do not defeat any plug/

29、socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped. 5. do not apply ac power to this Blu-ray diSc Player and / or any of its electrical assemblies unless all solidstate device heat sinks are correctly installed. 6. always connect the test instrument

30、 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 the ac outlet and turn the power on. connect an insulation resistance meter (500v) to the b

31、lades of the attachment plug. the insulation resistance between each blade of the attachment plug and accessible conductive parts (note 1) should be more than 1Mohm. Note 1 : accessible conductive Parts include Metal panels, input terminals, earphone jacks,etc. Electrostatically Sensitive (ES) Devic

32、es 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 transistors and semiconductor chip components. the follo

33、wing 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 your body by touching a known earth ground. alternative

34、ly, obtain and wear a commercially 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, place the assembly on a conductive surface such as alumi

35、num foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder eS devices. 4. use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges suf

36、ficient 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 protective package until immediately before you are ready to install it. (Most replacement eS devices are

37、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 material to the chassis or circuit assembly into which the de

38、vice 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. (normally harmless motion such as the brushing together of your clothes fabric or the liftin

39、g of your foot from a carpeted floor can generate static elec- tricity sufficient to damage an eS device.) 1-5Copyright 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Burn a dvd recordable disc or uSB with a file that is named to “lG_Bd_lv4

40、00M.roM(Bd370)”. insert a upgrading disc or uSB. Show help message for disc upgrade as follows. Press play key to upgrade and it will show progress information after completing upgrade then power is off. SOFTWARE UPGRADE 1-6Copyright 2009 LG Electronics. Inc. All right reserved. Only for training an

41、d service purposes LGE Internal Use Only SPECIFICATIONS General Power requirements: ac 100240v, 50/60hz Power consumption: 18W dimensions (W x h x d): approx. 430 x 54 x 245mm without foot Weight (approx.): 2.7kg operating temperature: 5c to 35 operating humidity: 5% to 90% Outputs video out: 1.0v (

42、p-p), 75, sync negative, rca jack x 1 coMPonent video out: (y) 1.0v (p-p), 75, sync negative, rca jack x 1 (Pb)/(Pr) 0.7v (p-p), 75, rca jack x 2 hdMi out (video/audio): 19pin (hdMi standard, type a) analoG audio out: 2.0vrms (1khz, 0dB), 600, rca jack (l, r) x 1 diGital out (coaXial): 0.5v (p-p), 7

43、5, rca jack x 1 diGital out (oPtical): 3v (p-p), optical jack x 1 system laser: Semiconductor laser, wavelength: 405nm / 650nm Signal system: Standard Pal/ntSc color tv system Frequency response: 20hz to 20khz (48khz, 96khz, 192khz sampling) Signal-to-noise ratio: More than 100dB (analoG out connect

44、ors only) harmonic distortion: less than 0.008% dynamic range: More than 95dB lan port: ethernet jack x 1, 10BaSe-t/100BaSe-tX Note : design and specifications are subject to change prior notice. 2-1Copyright 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE In

45、ternal Use Only SECTION 2 CABINET & MAIN CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS .2-2 EXPLODED VIEWS . 2-3 1. caBinet and Main FraMe Section . 2-3 2. deck MechaniSM Section (hl-04P) . 2-4 3. PackinG acceSSory Section .2-5 2-2Copyright 2009 LG Electronics. Inc. All right reserved. Only for training

46、 and service purposes LGE Internal Use Only DISASSEMBLY INSTRUCTIONS 1. It is the product appearance. 2. remove the three screws on the back panel to seperate the top cover. 3. Push the top cover backward to seperate the top cover completely. 4. remove the nine front panel hooks (four hooks on the top, two hooks on the both side and three hooks on the bottom) to seperate the front panel.