LG-DP391B-dvd-sm 电路图 维修手册.pdf

《LG-DP391B-dvd-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《LG-DP391B-dvd-sm 电路图 维修手册.pdf（69页珍藏版）》请在收音机爱好者资料库上搜索。

1、PORTABLE DVD SERVICE MANUAL MODEL: DP391B/DP392G CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. MODEL: DP391B/DP392GSERVICE MANUAL P/NO : AFN56903624 MARCH, 2008 Website Internal Use Only RadioFans.CN 收音机爱 好者资料库 Copyright 2008 LG Electronics. Inc. All right reserved

2、. Only for training and service purposes LGE Internal Use Only CONTENTS SECTION 1.SUMMARY SECTION 2.EXPLODED VIEWS SECTION 3.ELECTRICAL SECTION 4.REPLACEMENT PARTS LIST RadioFans.CN 收音机爱 好者资料库 SECTION 1 SUMMARY CONTENTS 1-2 Copyright 2008 LG Electronics. Inc. All right reserved. Only for training an

3、d service purposes LGE Internal Use Only PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS.1-3 SERVICING PRECAUTIONS.1-4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE (ES) DEVICES UPGRADING FIRMWARE.1-5 SPECIFICATIONS.1-7 RadioFans.CN 收音机爱 好者资料库 1-3 Cop

4、yright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS IMPORTANT SAFETYNOTICE This manual was prepared for use only by properly trained audio-video service technicians. When servicing th

5、is 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 layout

6、 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 designators and are required to maintain safe performance. No deviations are allowed without prior approval by LG

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

8、ever perform customized 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 guidelines.

9、 GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended 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 prese

10、nce of noninsulated “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 equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTI

11、ON: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALLFUSES WITH 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

12、following: FIRE AND SHOCK HAZARD 1. Be sure that all components are positioned 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, str

13、ain 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 not been defeated. 3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be cer

14、tain 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 necessary. 5. No lead or component should touch a high current device or a resistor rated at 1

15、 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, handle and screws) to be sure that set is safe to operate witho

16、ut danger of electrical shock. DO NOTUSE ALINE 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 a known good earth ground wat

17、er 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 metallic part. Voltage measured mu

18、st not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp 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, o

19、r 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 venting. The customer should also av

20、oid the use of decorative scarves or other coverings that might obstruct ventilation. 4. Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. Aproduct mounted to a shelf or platform must retain its original feet (or the equival

21、ent 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 or in a tilted position, unless the r

22、eceiver 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 extension cords. Explain that a fores

23、t of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family. 1-4 Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SERVICING PRECAUTIONS CAUTION: Before servicing the PORTABLE DVD covered b

24、y 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 precautions in this publication, always follow the safety precautions. Remember Safety Firs

25、t : General Servicing Precautions 1.Always unplug the PORTABLE DVD 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. (

26、3) Connecting a test substitute in parallel with an electrolytic 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 PORTABLE DVD or any of its assemblies. 3.Unless spe

27、cified 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, lubrication of contacts is not required. 4.D

28、o not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped. 5.Do not apply AC power to this PORTABLE DVD and / or any of its electrical assemblies unless all solid state device heat sinks are correctly installed. 6.Always connect the te

29、st 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 the AC outlet and turn the power on. Connect an insulation resistance meter (5

30、00V) to the blades 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 Sensitiv

31、e (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 transistors and semiconductor chip component

32、s. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1.Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Al

33、ternatively, 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

34、as aluminum 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 charg

35、es 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 protective package until immediately before you are ready to install it. (Most replacement ES devices

36、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 material to the chassis or circuit assembly into which th

37、e 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 brushing together of your clothes fabric or the lifti

38、ng of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.) 1-5 Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only UPGRADING FIRMWARE Please follow the below process to download a program

39、with disc 1. Turn on the DVD-player. (Note. Be sure that there is no disc in DVD-player) 2. Press “SETUP” button on Remote control. 3. Choose a “display” menu by using the cursor button and then choose a “TV Aspect” menu. And choose “16:9” menu. 4. Press the 1 - 3 - 9 - 7 - 1 - 3 - 9(numerical butto

40、n) - Enter key on remote control to confirm the system information. 5. Remember or write the model name. 6. Change the program file name of new version to the model name Ex New ver. program file - LG_DV_LP81F32000AZV_V014.ROM Model name - LG_DV_LV80F32000AZV Change New ver. program file like this -

41、LG_DV_ LV80F32000AZV.ROM If you don”t change the file name like that, Disc download isn”t be worked. 7. Copy the changed file to a USB memory stick. 8. Insert the copied USB memory stick to DVD-player. 9. Press the MODE button on the Potable DVD-player. 10. Select External and USB. 11.If the below p

42、icture appears on the screen, Select “Start” and Press “OK” button on Remote controller. While this menu appears, please dont eject disc or take out USB 12.After the below picture appears on the screen, New DVD program will download from USB memory stick automatically. Do not take out the USB memory

43、 stick. 1-6 Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 13.After USB download is completed, DVD-player displays below picture automatically. 14.Press the Reset button on the DVD-Player. 15.Remove the USB memory stick. 16.Turn o

44、n the DVD-player. Select the initial Language and Press “Enter” button. Then, Select “Enter” and Press “Enter” button. 17.Do it again the process 1, 2, 3, 4 to confirm the version. 18.Press the Reset button on the DVD-Player. 1-7 Copyright 2008 LG Electronics. Inc. All right reserved. Only for train

45、ing and service purposes LGE Internal Use Only SPECIFICATIONS DVD PLAYER Power supplyDC 12V (AC adapter terminal), DC 7.5V (Battery) Power consumption12W Weight980g (without battery pack) External dimensions(W X D X H)230 X 145.5 X 39(mm) Signal system PAL LaserSemiconductor laser and 1 beam / 2LD S

46、ystem Frequency range (audio)DVD linear sound:48kHZ sampling 4HZ to 20kHZ Signal-to-noise ratio(audio)More than 80dB Dynamic range(audio)More than 80dB Harmonic distortion(audio)0.04% Operating conditions(audio)Temperature: 41F to 95F TERMINALS DC input1 Composite Video IN/OUTPUT1 Audio IN/OUTPUT Ea

47、rphone output2 Mini USB input1 3 in 1 memory slot1 LIQUID CRYSTAL DISPLAY Panel size8inches (16:9) Projection systemTN color transmission Driving systemTFT active matrix SUPPLIED ACCESSORIES RCAAudio/Video cable1 AC Adapter (MPA-630A)1 Car Adapter (WLD-041)1 USB Cable1 Remote control1 Battery for Re

48、mote control (Lithium)1 1-8 Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only MEMO 2-1 Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS.