LG-DR165-cd-sm 电路图 维修手册.pdf

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1、DVD RECORDER SERVICE MANUAL MODEL : DR165/DR175/DR676X CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETYPRECAUTIONS” IN THIS MANUAL. MODEL : DR165/DR175/DR676XSERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 CONTENTS SECTION 1 . . . . SUMMARY SECTION 2 . . . . CABINET & MAIN CHASSIS SECTION 3 . . . . ELECTR

2、ICAL SECTION 4 . . . . RS-01A LOADER PART SECTION 5 . . . . REPLACEMENT PARTS LIST RadioFans.CN 收音机爱 好者资料库 1-1 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-2 SERVICING PRECAUTIONS. 1-3 General Servicing Precautions Insulation Checking Prodedure Electrostatical

3、ly Sensitive Devices SERVICE INFORMATION FOR EEPROM IC SETTING. 1-4 FLASH UPGRADE. 1-5 LOADER UPGRADE. 1-7 SPECIFICATIONS. 1-9 RadioFans.CN 收音机爱 好者资料库 1-21-2 IMPORTANT SAFETY NOTICE This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product

4、, 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 those in the original circuit and their physical location, wiring and lead dress must conform to original layo

5、ut 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- nent designators and are required to maintain safe performance. No deviations are allowed without prior approval

6、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 the set is not delayed until the new service literature is printed. CAUTION: Do not attempt to modify this prod

7、uct 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 injury. Service work should be performed only after you are thoroughly familiar with these safety checks and se

8、rvicing 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. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service per

9、sonnel to the presence 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 equi- lateral triangle is intended to convey to the service personnel the following fuse replacement

10、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 an isolation transformer for protection from AC line shock. After the original service problem has been corrected

11、, 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 on items trans-ported to and from the repair shop. 2. Verify that all protective devices such as insulators, barrie

12、rs, 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 not been defeated. 3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sha

13、rp 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 insulation (including the AC cord), and replace if necessary. 5. No lead or component should touch a high current dev

14、ice 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, handle and screws) to be sure that

15、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 in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor betwe

16、en 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 capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed

17、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 corrected immediately. TIPS ON PROPER INSTALLATION 1. Never install any receiver in a closed-in recess, cubbyhole, or

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

19、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 mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must ret

20、ain 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

21、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 trying to roll a cart with small cast- ers across thresholds or deep pile carpets. 7. Caution customers against u

22、sing 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 this probe on each exposed metal part. Good Earth Ground such as the Water Pipe, Conduit, etc. 0.15uF PRODUCT SAF

23、ETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1-3 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD Recorder 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 servic- ing

24、 precautions and any of the safety precautions in this pub- lications, always follow the safety precautions. Remembers Safety First: General Servicing Precautions 1. Always unplug the DVD Recorder AC power cord from the AC power source before: (1)Removing or reinstalling any component, circuit board

25、, 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 elec- trolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacito

26、rs may result in an explosion hazard. 2. Do not spray chemicals on or near this DVD Recorder or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped

27、 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 whitch instruments covered by this service manual might be equipped. 5. Do not apply AC power to this DVD Record

28、er 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 connection the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Che

29、cking 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- tance between each blade of the attachment plug and acces- sible conductive parts (Note 1) should be more

30、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 can be damaged easily by static electricity. Such components commonly are called Electrostatically Sens

31、itive (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 reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any se

32、miconductor 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 available discharging wrist strap device, which should be removed for potential shock reasons prior to applyin

33、g 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 exposure of the assembly. 3. Use only a grouned-tip soldering iron to solder or unsolder ES

34、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 freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do

35、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 together by conductive foam, aluminum foil, or comparable conductive material). 7. Immediately before removi

36、ng 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 power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodil

37、y 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 generate static elec- tricity sufficient to damage an ES device.) 1-4 SERVICE INFORMATION FOR EEPROM IC SETT

38、ING MICOM START Press the CLEAR key on the Remote controller and the PROG. - key one the Front Panel the same time, then it goes in to Tracking initial mode. EEPROM ID CHECK 2 BYTE(B3,248,249) NAMEHEXBINARY OPT1D900000000 OPT20000000000 OPT36000000000 OPT44100000000 OPT54B00000000 OPT62C00000000 OPT

39、74600000000 OPT81200000000 WRITE : OKEXIT : MP MOVE : 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 Remocon number clear key pressed in the status o

40、f powering 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 the CHECK There is a Possibility of doing and the OPTION the REWRITE it is possible. OPTION DATA READ 5TIME & COMPARE MICOM NORMAL

41、 OPERATION START ID OK? OPTION CONFIRMATION MODE Yes Yes No No 1-5 FLASH UPGRADE 1. MAKING UPGRADE DISC 1) 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 FLASH 1) Put Flash Upgrade Disc on the Set. 2) Af

42、ter 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 860132M (PAL ) : LG_DR100_

43、8601PAL_UPDATE.590 DR100 8603 64M (NTSC) : LG_DR100_8603NT_UPDATE.590 DR100 8603 64M (PAL ) : LG_DR100_8603PAL_UPDATE.590 1-6 4) 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. Eject the Disc. R

44、eboot the set. 1-7 LOADER UPGRADE 1.MAKING UPGRADE DISC 1) Do Physical format as ISO9660 or JOLIET file system 2) Make a Volume label as “DRIVE_UP”. 3) Write DvdSLXX.rs1, YASMSLXX.BIN on Root like below.(XX is Version) 2. LOADER UPGRADE 1) Put Loader Upgrade Disc on Set. 2) After Disc Reading, you c

45、an see the below screen. 3) Press REC KEY 3 times. 1-8 4) 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 off 1-9 SPECIFICATIONS GENERAL Pow

46、er requirements AC 200-240V, 50/60 Hz Power consumption 25W Dimensions (approx.) 430 X 54 X 275 mm (w x h x d) without foot Mass (approx.) 4.1 kg Operating temperature 5C to 35C Operating humidity 5 % to 90 % Television system PAL I, B/G, I/I, SECAM D/K, K1, SECAM L color system Recording format PAL

47、 RECORDING Recording format DVD Video Recording, DVD-VIDEO Recordable media DVD-ReWritable, DVD-Recordable, DVD+ReWritable, DVD+Recordable Recordable 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 format Sampling frequen

48、cy 27MHz Compression format MPEG 2 (VBR support) Audio recording format Sampling frequency 48kHz Compression format Dolby Digital PLAYBACK Frequency response DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHz DVD (PCM 96 kHz): 8 Hz to 44 kHz Signal-to-noise ratio More than 100 dB (AUDIO OUT connector) Harmonic distortion Less than 0.008% (AUDIO OUT connect