LG-DA5630A-cd-sm 电路图 维修手册.pdf

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1、- 1-1 - CONTENTS SECTION 1. GENERAL SERVICING PRECAUTIONS.1-2 ESD PRECAUTIONS.1-4 SPECIFICATIONS.1-5 LOCATION OF CUSTOMER CONTROLS.1-6 SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTING GUDIE.2-1 DVD PLAYER PROGRAM DOWNLOAD METHOD.2-5 WAVEFORMS OF MAJOR CHECK POINT.2-7 INTERNAL BLOCK DIAGRAM OF ICs.2-

2、8 IC VOLTAGE SHEET .2-10 BLOCK DIAGRAM.2-14 SCHEMATIC DIAGRAMS.2-16 PRINTED CIRCUIT DIARGAMS.2-28 SECTION 3. DVD PART ELECTRICAL TROUBLESHOOTING GUIDE .3-1 BLOCK DIAGRAMS.3-9 SCHEMATIC DIAGRAMS.3-13 WAVEFORMS.3-21 PRINTED CIRCUIT DIAGRAM.3-27 SECTION 4. MECHANSIM.4-1 SECTION 5. EXPLODED VIEWS.5-1 SE

3、CTION 6. SPEAKER PART.6-1 SECTION 7. REPLACEMENT PARTS LIST.7-1 RadioFans.CN 收音机爱 好者资料库 SECTION 1. GENERAL PART SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use.

4、2) The pick-up should never be subjected to external pressure or impact. 2. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure an

5、d impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation scre

6、ws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged. 5) Cleaning the lens surface If there is dust on the lens surface, t

7、he dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure.

8、 If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. - 1-2 - Storage in conductive bag

9、Drop impact NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin. Magnet How to hold the pick-up aPressure Pressure Cotton swab Conductive Sheet RadioFans.CN 收音机爱 好者资料库 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporat

10、e a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is composed of man

11、y optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconne

12、ct the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because ther

13、e is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an armband (1M) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent sta

14、tic electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. - 1-3 - Armband Conductive Sheet Resistor (1 Mohm) Resistor (1 Mohm) RadioFans.CN 收音机爱 好者资料库 ESD PRECAUTIONS Electrostatically Sensitive Devic

15、es (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. T

16、he 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. Alter

17、natively, 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 ESD devices, place the assembly on a conductive surface such a

18、s aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical charg

19、es sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devi

20、ces are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into wh

21、ich the device will by installed. CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or

22、the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device). CAUTION. GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS

23、 VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. - 1-4 - - 1-6 - LOCATION OF CUSTOMER CONTROLS F

24、RONT PANEL DISPLAY WINDOW SKIP/TUNE BUTTON STOP BUTTON PAUSE BUTTON PLAY BUTTON OPEN/CLOSEDISC TRAY FUNCTION BUTTON MENU (MONO/STERO) BUTTON VOLUME CONTROLLER PHONE CONNECTORs TITLE (FM/AM) BUTTON POWER BUTTON AND INDICATOR SOUND MODE INDICATOR ANGLE ICON INDICATOR DISC INDICATOR PLAY/PAUSE INDICATO

25、R REC/RDS INDICATOR REPEAT PLAY BACK MODE INDICATOR TOTAL PLAYING TIME/ELAPSED TIME/FREQUENCY/DELAY TIME/VOLUME. INDICATORS SLEEP INDICATOR TUNED INDICATOR STEREO INDICATOR - 1-7 - REAR PANEL Y SPEAKER CONNECTORS VIDEO SELECTOR SWITCH VIDEO1 (INPUT/OUT PUT) CONNECTORS S-VIDEO OUT CONNECTOR AM ANTENN

26、A CONNECTOR FM75 COAXAL ANTENNA CONNECTOR S-VIDEO COMPONENT SWITCH VIDEO 2(INPUT) CONNECTOR WOOFER OUT CONNECTOR - 2-1 - SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTING GUDIE Turn power on. Is power on? Does initial read work? Does it play? Does it output audio? Check power supply circuit. Check la

27、ser circuit. Check focus circuit. Check disc. Check tracking servo circuit. Check audio circuit. OK YES YES YES YES NO NO NO NO 1. - 2-2 - 2. AUDIO . COM Circuit POWER ON Does CD/DVD appear at FLT? Does LOADING appear at FLD? Does it appear DVD Error at FLD? Does Video1/2 FM 87.5 appear at FLD? OK.

28、Check Connector(PN103)if is normally. Reconnet it. Refer to SMPS Refer to oscillator Circuit. Check DVD Reset Waveform. Check IC101 Reset Wavefrom. Check 3.3V line. Check Power dection Circuit. Check power part of Main B/D. Check oscillator of x101. Check if CN103 PINis High. Check if IC101 PINis Hi

29、gh. Check if IC101 PIN , , , is high (5V). Check if IC101 PIN is High . Replace IC101. Does no Dise or Time appear at FLD? Check if DVD an Audio Micom Interface is OK. Check power. Check DVD Module. Check SMPS. 174672 90 11 5 26 - 2-3 - 3. Front Circuit (1/2) POWER ON LED OFF. Is digitron on normall

30、y? Check if the PN101/PN102 is OK. Check if the Front power is OK(*1). Refer to SMPS Part. Reconnec it. Check if the VFD001 PINs are OK. Check Patten and Resoldering. Check if all Buttens are OK. Check if the Volume is OK. Check if the Headphone is OK. Check if the Remocon is OK. Front B/D OK. * 1:

31、PN101 PINs PIN 1: -32V PIN 8: -28V PIN 9: -32V PIN 20: 12V - 2-4 - Front Circuit (2/2) Check if the Power part of the Front is OK. Check if the Power part of the Front is OK. Check if R027R036 OK. Check if PN101 PIN12, 13 Waverfrom OK. Check if R023, R024 OK. Refer to Micom Circuit Refer to Micom Ci

32、rcuit. Refer to power(SMPS). Refer to power(SMPS). Refer to SMPS part. Refer to SMPS. Replace R027R036 Replace R023, R024. Check if the Power part of the Front is OK. Check if the Power Part of the Front is OK. Check if the RMC001Volume is OK (5V). Check if the Remocon waveform of the PN101 PIN11. C

33、heck if the PN101 PIN19 is Low. Check if headphoneJack in JK001 is OK. Refer to M-COM Circuit. Check Main B/D. Replace RMC 001.Check RMC Circuit. Refer to Micom Circuit. Check JK001 Circuit. - 2-5 - DVD PLAYER PROGRAM DOWNLOAD METHOD 1. DVD player without CD-RW option 1-1) Download the DVD program f

34、rom your PC as following procedure ACTIONFLD display Plug the Power cord out Connect the Fixture for download (Refer to Deck Mechanism Adjustment) Execute the prgram for download(Flashrom.exe) Open the DVD program file Plug the Power cord in Press the MENU Key on the Remote controllerFLASH Select Do

35、wn icon with injector icon then start download from the P.C In status of download Erased the Flash memoryFLASH ERA Written the Flash memoryFLASH XX(XX: Program counter) Verified the Flash memoryFLASH XX(XX: Program counter) Completed the downloadFINISHED If an error was occurred during download, do

36、not unplug the Power cord, and retry the download form the P.C until it is completed. 2. DVD player with CD-RW option(for models using C-CUBE MPEG chip, marking on the IC is ZIVA) 2-1) Make the DVD program upgrade Disc as following procedure *Recommended S/W: adaptec Easy CD Creater *use file format

37、: ISO9660 Rename the souce file from the P.C to FIRMWARE.BIN (Ex, If Source file is lg_a3_korea.bin, rename to FIRMWARE.BIN) Format the CD-RW Disc as below Make the Folder name to UPGRSADE.DVD under root folder (Ex, UPGRADE.DVD) Download the source file renamed to FIRMWARE.BIN in the folder (Ex, UPG

38、RADE.DVD FIRMWARE.BIN) W WW - 2-6 - 2-2) Insert the upgrade Disc into the DVD player slot, then the DVD player reads the Disc and upgrade the Firmware itself as followings StatusFLD display on DVD player Detect the upgrade DiscNo display Read the DiscCd rEAD XX(XX: Program counter) Erased the Flash

39、memoryFLASH ERA Written the Flash memoryFLASH XX(XX: Program counter) Verified the Flash memoryFLASH XX(XX: Program counter) Completed the upgradeFINISHED Note: After completed, plug the Power cord out and in again, and then press the Open key, then the Disc will be ejected. Caution: While CD detect

40、ing and reading, if Open key or Power is pressed Then download procedure will be aborted. 3. DVD player with CD-RW option (for models using NS MPEG chip, marking on the IC is PANTERA) 3-1) Make the DVD program upgrade Disc as following procedure *Recommended S/W: adaptec Easy CD Creater *use file fo

41、rmat: ISO9660 Format the CD-RW Disc as below. Make the Folder name to “lg_dvd UPGRADE lg” under root folder ( lg_dvd_firmware upgrade lg) Download the source file in the folder (Ex, If the source file is “lg_a3_korea.bin, “lg_dvd firmware upgrade lg lg_a3_korea.bin”) 3-2) UPgrade the firmware for DVD player as followings ACTIONFLD display on dvd player Insert the upgraded Disc into the DVD player soltPress Up then starts the detecting Press the UP key on the Remote controllerREAD 0(If error is occurred, displayed then starts the readingretry counter) - Starts the upgradingUPGRADE 0(If