LG-DR175-dvd-sm 维修电路原理图.pdf

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1、DVD RECORDERSERVICE MANUALMODEL : DR165/DR175/DR676XCAUTIONBEFORE SERVICING THE UNIT, READ THE “SAFETYPRECAUTIONS”IN THIS MANUAL.MODEL : DR165/DR175/DR676XSERVICE MANUALRadioFans.CN 收音机爱 好者资料库CONTENTSSECTION 1 . . . . SUMMARYSECTION 2 . . . . CABINET & MAIN CHASSISSECTION 3 . . . . ELECTRICALSECTION

2、 4 . . . . RS-01A LOADER PARTSECTION 5 . . . . REPLACEMENT PARTS LISTRadioFans.CN 收音机爱 好者资料库1-1SECTION 1SUMMARYCONTENTSPRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-2SERVICING PRECAUTIONS. 1-3 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices

3、SERVICE INFORMATION FOR EEPROM IC SETTING. 1-4FLASH UPGRADE. 1-5LOADER UPGRADE. 1-7SPECIFICATIONS. 1-91-21-2IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-video servicetechnicians.When servicing this product, under no circumstances should the originaldesign be

4、 modified or altered without permission from LG ElectronicsCorporation. All components should be replaced only with types identical tothose in the original circuit and their physical location, wiring and lead dressmust conform to original layout upon completion of repairs.Special components are also

5、 used to prevent x-radiation, shock and fire haz-ard. These components are indicated by the letter “x” included in their compo-nent designators and are required to maintain safe performance. No deviationsare allowed without prior approval by LG Electronics Corporation.Circuit diagrams may occasional

6、ly differ from the actual circuit used. This way,implementation of the latest safety and performance improvement changesinto the set is not delayed until the new service literature is printed.CAUTION: Do not attempt to modify this product in any way. Never performcustomized installations without man

7、ufacturers approval. Unauthorized modi-fications will not only void the warranty, but may lead to property damage oruser injury.Service work should be performed only after you are thoroughly familiar withthese safety checks and servicing guidelines.GRAPHIC SYMBOLSThe exclamation point within an equi

8、lateral triangle is intended toalert the service personnel to important safety information in theservice literature.The lightning flash with arrowhead symbol within an equilateraltriangle is intended to alert the service personnel to the presenceof noninsulated “dangerous voltage” that may be of suf

9、ficientmagnitude to 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 thefollowing fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE AL

10、L FUSES WITH THE SAME TYPE ANDRATING AS MARKED NEAR EACH FUSE.SERVICE INFORMATIONWhile servicing, use 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 HAZARD1. Be sure that all components a

11、re positioned to avoid a possibility of adjacentcomponent shorts. This is especially important on items trans-ported to andfrom 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 reinsta

12、lledper the original design. Be sure that the safety purpose of the polarized lineplug has not been defeated.3. Soldering must be inspected to discover possible cold solder joints, soldersplashes, or sharp solder points. Be certain to remove all loose foreign par-ticles.4. Check for physical evidenc

13、e of damage or deterioration to parts and compo-nents, for frayed leads or damaged insulation (including the AC cord), andreplace if necessary.5. No lead or component should touch a high current device or a resistor ratedat 1 watt or more. Lead tension around protruding metal surfaces must beavoided

14、.6. After reassembly of the set, always perform an AC leakage test on allexposed metallic parts of the cabinet (the channel selector knobs, antennaterminals, handle and screws) to be sure that set is safe to operate withoutdanger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-FORMER DURING T

15、HIS TEST. Use an AC voltmeter having 5000 ohms pervolt or more sensitivity in the following manner: Connect a 1500 ohm, 10watt resistor, paralleled by a .15 mfd 150V AC type capacitor between aknown good earth ground water pipe, conduit, etc.) and the exposed metal-lic parts, one at a time. Measure

16、the AC voltage across the combination of1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using anon-polarized adaptor and repeat AC voltage measurements for eachexposed metallic part. Voltage measured must not exceed 0.75 volts RMS.This corresponds to 0.5 milliamp AC. Any value exceed

17、ing this limit consti-tutes a potential shock hazard and must be corrected immediately.TIPS ON PROPER INSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely fittingshelf space over, or close to, a heat duct, or in the path of heated air flow.2. Avoid conditions of hig

18、h humidity such as: outdoor patio installations wheredew is a factor, near steam radiators where steam leakage is a factor, etc.3. Avoid placement where draperies may obstruct venting. The customershould also avoid the use of decorative scarves or other coverings thatmight obstruct ventilation.4. Wa

19、ll- and shelf-mounted installations using a commercial mounting kit mustfollow the factory-approved mounting instructions. A product mounted to ashelf or platform must retain its original feet (or the equivalent thickness inspacers) to provide adequate air flow across the bottom. Bolts or screwsused

20、 for fasteners must not touch any parts or wiring. Perform leakage testson 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

21、to the cart.Caution the customer on the hazards of 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 ofextensions, sprouting from a single outlet, can lead to disastrous conse-quences to home and

22、 family.A.C. Voltmeter1500 OHM10 WATTPlace this probeon each exposedmetal part.Good Earth Groundsuch as the WaterPipe, Conduit, etc.0.15uFPRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS1-3SERVICING PRECAUTIONSCAUTION : Before servicing the DVD Recorder covered bythis service data and its supp

23、lements and addends, read andfollow the SAFETY PRECAUTIONS. NOTE : if unforeseencircumstances create conflict between the following servic-ing precautions and any of the safety precautions in this pub-lications, always follow the safety precautions.Remembers Safety First:General Servicing Precaution

24、s1. Always unplug the DVD Recorder AC power cord from theAC power source before:(1)Removing or reinstalling any component, circuit board, module, or any other assembly.(2)Disconnection or reconnecting any internal electricalplug or other electrical connection.(3)Connecting a test substitute in paral

25、lel with an elec-trolytic capacitor.Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may resultin an explosion hazard.2. Do not spray chemicals on or near this DVD Recorder orany of its assemblies.3. Unless specified otherwise in this service data, cl

26、eanelectrical 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, lubricationof contacts is not required.4. Do not defeat any plug/socket B+ voltage interl

27、ocks withwhitch instruments covered by this service manual mightbe equipped.5. Do not apply AC power to this DVD Recorder and/or anyof its electrical assemblies unless all solid-state deviceheat sinks are cerrectly installed.6. Always connect test instrument ground lead to theappropriate ground befo

28、re connection the test instrumentpositive lead. Always remove the test instrument ground lead last.Insulation Checking ProcedureDisconnect the attachment plug from the AC outlet and turnthe power on. Connect an insulation resistance meter(500V)to the blades of the attachment plug. The insulation res

29、is-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, Earphone jacks, etc.Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices

30、can be damagedeasily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples oftypical ES devices are integrated circuits and some fieldeffect transistors and semiconductor chip components.The following techniques should be used to help reduce the

31、incidence of component damage caused by static electricity.1. Immediately before handling any semiconductor compo-nent or semiconductor-equipped assembly, drain off anyelectrostatic charge on your body by touching a knownearth ground. Alternatively, obtain and wear a commer-cially available discharg

32、ing 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 buildup or e

33、xposure of the assembly.3. Use only a grouned-tip soldering iron to solder or unsolderES devices.4. Use only an anti-static solder removal device. Somesolder removal devices not classified a “anti-static” cangenerate electrical charges sufficient to damage ES devices.5. Do not use freon-propelled ch

34、emicals. These cangenerate electrical charge sufficient to damage ESdevices.6. Do not remove a replacement ES device from its protective package until immediately before you are ready toinstall it. (Most replacement ES devices are packaged withleads electrically shorted together by conductive foam,a

35、luminum foil, or comparable conductive material).7. Immediately before removing the protective material fromthe leads of a replacement ES device, touch the protectivematerial to the chassis or circuit assembly into which thedevice will be installed.Caution : Be sure no power is applied to the chassi

36、s orcircuit, 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 liftingof your foot from a carpeted floor can generate static elec-tricity sufficien

37、t to damage an ES device.)1-4SERVICE INFORMATION FOR EEPROM IC SETTINGMICOM STARTPress the CLEAR key on the Remote controller and the PROG. - key one the Front Panelthe same time, then it goes in toTracking initial mode.EEPROM ID CHECK2 BYTE(B3,248,249)NAMEHEXBINARYOPT1D900000000OPT20000000000OPT360

38、00000000OPT44100000000OPT54B00000000OPT62C00000000OPT74600000000OPT81200000000WRITE : OKEXIT : MPMOVE : EDIT : MASK : 00 , EEP : FF(0R), D17(Each mask ,eeprom, It shows a development release version.)* EEPROM INITIAL *- SETUP is displayed in the field if pressing the Front PROG. - & + Key with the R

39、emocon number clear key pressed in the status ofpowering on.- AUTO SEARCH is done since the initial screen of ACMS is serviced if powering on.DETECT NEW EEPROM (OPTION EDIT SCREEN)OPTION condition of Present time theCHECK There is a Possibility of doing andthe OPTION the REWRITE it is possible.OPTIO

40、N DATA READ5TIME & COMPAREMICOM NORMALOPERATION STARTID OK?OPTION CONFIRMATION MODEYesYesNoNo1-5FLASH UPGRADE1. MAKING UPGRADE DISC1) Do Physical format as ISO9660 or JOLIET file system.2) Dont care about the CD Volume label.3) Write DR100 BE Upgrade File on Root.2. UPGRADE FLASH1) Put Flash Upgrade

41、 Disc on the Set.2) After Disc Reading, you can see below screen.3) Press REC KEY 3 times. It will start Inspection. * OPTIONAL PARTS DR100 8601 64M NTSC) : LG_DR100_8601NT64_UPDATE.590 DR100 860164M (PAL ) : LG_DR100_8601PAL64_UPDATE.590 DR100 860132M (NTSC) : LG_DR100_8601NT_UPDATE.590 DR100 86013

42、2M (PAL ) : LG_DR100_8601PAL_UPDATE.590 DR100 8603 64M (NTSC) : LG_DR100_8603NT_UPDATE.590 DR100 8603 64M (PAL ) : LG_DR100_8603PAL_UPDATE.5901-64) You can see both current and upgrade version. Press REC KEY.5) Upgrading.6) After Upgrading, you can see the below screen. And automatically open tray.E

43、ject the Disc. Reboot the set. 1-7LOADER UPGRADE1.MAKING UPGRADE DISC1) Do Physical format as ISO9660 or JOLIET file system2) Make a Volume label as “DRIVE_UP”.3) Write DvdSLXX.rs1, YASMSLXX.BIN on Root like below.(XX is Version)2. LOADER UPGRADE1) Put Loader Upgrade Disc on Set.2) After Disc Readin

44、g, you can see the below screen. 3) Press REC KEY 3 times.1-84) After Tray open, pick the disc up and close the tray.5) It shows both the current version and upgrade version. Press REC KEY. 6) Upgrading.7) After finishing Upgrade, it shows the below screen and is tuned off1-9SPECIFICATIONS GENERALPo

45、wer requirements AC 200-240V, 50/60 HzPower consumption 25WDimensions (approx.) 430 X 54 X 275 mm (w x h x d) without footMass (approx.) 4.1 kgOperating temperature 5C to 35COperating humidity 5 % to 90 %Television system PAL I, B/G, I/I, SECAM D/K, K1, SECAM L color systemRecording format PAL RECOR

46、DINGRecording format DVD Video Recording, DVD-VIDEORecordable media DVD-ReWritable, DVD-Recordable, DVD+ReWritable, DVD+RecordableRecordable time DVD (4.7GB): Approx. 1 hour 20 minutes (XP mode), 2 hours (SP mode), 4 hours (LP mode), 6 hours (EP mode)Video recording formatSampling frequency 27MHzCom

47、pression format MPEG 2 (VBR support)Audio recording formatSampling frequency 48kHzCompression format Dolby Digital PLAYBACKFrequency response DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHzDVD (PCM 96 kHz): 8 Hz to 44 kHzSignal-to-noise ratio More than 100 dB (AUDIO OUT connector)Harmonic disto

48、rtion Less than 0.008% (AUDIO OUT connector)Dynamic range More than 95 dB (AUDIO OUT connector) INPUTSAERIAL IN Aerial input, 75 ohmsVIDEO IN 1.0 Vp-p 75 ohms, sync negative, RCA jack x 2 / SCART x 2AUDIO IN 2.0 Vrms more than 47 kohms, RCA jack (L, R) x 2 / SCART x 2S-VIDEO IN (Y) 1.0 V (p-p), 75 ,

49、 sync negative, Mini DIN 4-pin x 1(C) 0.3 V (p-p) 75 DV IN 4 pin (IEEE 1394 standard) OUTPUTSVIDEO OUT1 Vp-p 75 , sync negative, RCA jack x 1 / SCART x 2S-VIDEO OUT(Y) 1.0 V (p-p), 75 , sync negative, Mini DIN 4-pin x 1(C) 0.3 V (p-p) 75 COMPONENT VIDEO OUT(Y) 1.0 V (p-p), 75 , sync negative, RCA ja

50、ck x 1(Pb)/(Pr) 0.7 V (p-p), 75 , RCA jack x 2Audio output (digital audio) 0.5 V (p-p), 75 , RCA jack x 1Audio output (optical audio) 3 V (p-p), 75 , Optical connector x 1Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 , RCA jack (L, R) x 1 / SCART x 22-1SECTION 2CABINET & MAIN CHASSISCONTEN