JBL-DVD280-dvd-sm 电路图 维修手册.pdf

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1、 Model DVD 280 DVD 280 DVD/CD/CD-R/CD-RW/VCD MP3 Player Service Manual - Contents - SERVICE PRECAUTIONS.2 SPECIFICATIONS.5 FRONT PANEL CONTROLS.6 INFORMATION DISPLAY.7 REMOTE CONTROL.8 REAR PANEL CONNECTIONS.11 CONNECTIONS/SETUP.12 TEST SCREEN.15 BASIC TROUBLESHOOTING GUIDE.16 EXPLODED VIEW.17 BLOCK

2、 DIAGRAM.18 PCB DRAWINGS19 ELECTRICAL PARTS LIST .23 MECHANICAL PARTS LIST 29 SEMICONDUCTOR PINOUTS.31 SYSTEM CONFIGURATION SPECS.38 SCHEMATICS.39 PACKAGE.53 JBL Consumer Products 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 4/2005 RadioFans.CN 收音机爱 好者资料库 1 SERVICING PRECAUTIONS NOTES REGARD

3、ING 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. 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 shoul

4、d never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and 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

5、. 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 screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switc

6、h 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, the 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

7、surface, therefore, a cot- ton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure. 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

8、 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. Storage in conductive bag NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin. Magnet How to hold the pick-up Conductive Sheet Cotton swab

9、Pressure Pressure Drop impact 2 RadioFans.CN 收音机爱 好者资料库 2 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These compo- nents are sensitive to, and easily affected by, static electricity. If such st

10、atic 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 many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humid

11、ity is high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered

12、 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 there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Worke

13、rs 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 static 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

14、 bare skin. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband 3 DVD280 DVD280 RadioFans.CN 收音机爱 好者资料库 3 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components com- monly are called Ele

15、ctrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated cir- cuits 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

16、 before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reaso

17、ns 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 sur- face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to

18、 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 charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to

19、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 devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7

20、. 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 which the device will by installed. CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PR

21、ECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen- erate static electricity sufficient to damage an ESD device). 4 DVD280 DVD

22、280 DVD280 TECHNICAL SPECIFICATIONS Applicable Disc:Disc formats: 5-inch (12cm) or 3-inch (8cm) DVD-Video, standard conforming DVD-R, DVD+R, DVD-RW, DVD+RW, VCD, SVCD, CD, CD-R, MP3, WMA, JPEG or CD-RW discs Region code: DVD Movie disc with Code shown on rear panel of unit only DVD-Layers: Single Si

23、de/Single Layer, Single Side/Dual Layer, Dual Side/Dual Layer Audio formats: Linear PCM, MPEG, MLP/CPPM Dolby Digital or DTS Audio Discs Video Signal System:PAL and NTSC Composite Video Output:1V p-p/75 ohms, sync negative polarity S-Video Output:Y/Luminance: 1V p-p/75 ohms, sync negative polarity C

24、/Chrominance: 0.286V p-p Component Video Output:Y: 1V p-p/75 ohms, sync negative polarity Pr: 0.7V p-p/75 ohms Pb: 0.7V p-p/75 ohms Analog Audio Output:2V rms max Frequency Response:DVD (Linear PCM): 2Hz 22kHz +0/0.5dB (48kHz sampling) 2Hz 44kHz +0/0.5dB (96kHz sampling) CD: 2Hz 20kHz +0/0.5dB Signa

25、l/Noise Ratio (SNR):113dB (A-weighted) Dynamic Range:DVD: 100dB (18-bit)/105dB (20-bit) CD/DVD: 96dB (16-bit) THD/1kHz:DVD/CD: 0.0025% Wow i.e., it will start from the same point on the disc where the unit was stopped. If you press the Stop Button 7Dtwice, then the Play Button 5B, the disc will star

26、t play from the beginning. The resume function is not available for CDs. The resume function is available after the unit has been placed in the Standby mode by pressing the Power On/Off (Standby) Button 2? and then powered on again, but only for DVDs. EVideo Off: Press to turn off video output for i

27、mproved performance from audio-only discs. Press again to restore video output (see page 39). FDisplay Dimmer: Press to change the brightness of the front-panel dis- play or to turn the display off com- pletely in the following order: FULL BRIGHTNESS HALF BRIGHTNESS OFF FULL BRIGHTNESS GClear: Press

28、 to remove the On- Screen Banner Display from the screen. HTitle: Press this button while a disc is playing to display the current title number. Press it again to jump to the next numbered title on the disc. Note that this function often remains active even when the discs software prohibits title ju

29、mping using the Skip/Step (Next) ButtonQ. INumeric Keys: Select numbers by pressing these buttons. JLight: Press to illuminate the but- tons on the remote control. KA-B Repeat: Press to select the beginning and end of passage A-B, which will play repeatedly. LZoom: When a DVD, JPEG, VCD or SVCD disc

30、 is playing, press this button to zoom the picture so that it is enlarged. There are four steps to the zoom function, each progressively larger. Press through each of the zoom stages to return to a normal pic- ture. Use the Navigation / Buttons 57 to view different areas of the enlarged image. Only

31、two enlargement sizes are available for VCDs and SVCDs (2x and 4x). MAngle: Press to access various camera angles on a DVD (if the DVD contains multiple camera angles). When a JPEG is being displayed, pressing the Angle Button w repeat- edly causes the on-screen image to rotate clockwise by 90 degre

32、es each press. If the disc also contains audio MP3 or WMA files, this portion of the disc must be deactivated by pressing the Setup Button ? to display the on-screen menu system. Use the /Navigation Buttons fh to highlight the Audio icon on the left side of the Player Menu, and press the Enter Butto

33、n i to deactivate it. NPic: When playing a disc con- taining JPEG still image files, press this button to view the previous picture. OPic+: When playing a disc con- taining JPEG still image files, press this button to view the next picture. DVD280 OM 7/12/04 4:41 PM Page 14 9 DVD280 DVD280 15 PSearc

34、h/Slow (Forward): Allows you to search forward through a disc while it is in Play mode. Each time you press this button while a DVD is playing, the search speed changes as below: F. SEARCH 2x F. SEARCH 16x F. SEARCH 64x F. SEARCH 200 x F. SEARCH 2x Two fast-search speeds are available for VCDs, SVCD

35、s and CDs: 4x and 32x. Fast-search is not available for MP3s or WMAs. This button also allows you to play movies in Slow mode. Each time you press this button while a DVD is play- ing, and after pressing the Pause Button9, the slow speed will be changed as below: F. SLOW 1/2x F. SLOW 1/4x F. SLOW 1/

36、8x F. SLOW 1/16x F. SLOW 1/2x Slow-speed playback is not available for CDs, or for MP3 and WMA discs. Two slow-play speeds are available for VCDs and SVCDs: 1/2x and 1/4x. See page 30 for more information on fast-search and slow-play. QSkip/Step (Next): Press to go to the beginning of the next track

37、. When the Pause Button9has been pressed during playback, the picture advances frame by frame each time this button is pressed. The step func- tion is only available for DVDs, VCDs and SVCDs. ?Status: Press while a disc is playing to view the on-screen status banner display. Use the Navigation K/L/B

38、uttons57to move through the different features in the Banner Display. When a value is high- lighted, such as Track Number or Time Remaining, press the Enter Button8to select it. The banner will display the available options. Scroll through the options using the Navigation Buttons7and press the Enter

39、 Button8to select the desired option. ?Disc Menu: Displays the DVD disc menu on-screen in Play mode. ?Setup: Press to access the DVD280s on-screen menu system. ?Subtitle: When a DVD is playing, press to select a subtitle language or to turn subtitles off. ?Random: Press for playback in random order.

40、 The Random function is not available when playing DVDs, except for random playback of a pro- grammed playlist. It is available when playing both commercial and record- able audio CDs and VCDs, and discs containing MP3, WMA or JPEG files. ?Power Off: Turns off the player to Standby mode. DVD280 OM 7

41、/12/04 4:41 PM Page 15 10 DVD280 DVD280 16 REAR-PANEL CONNECTIONS NORTHRIDGE,CA, USA DIGITAL AUDIO OUT OPTICAL COAXIAL ANALOG AUDIO OUT L R S-VIDEO Pr/Cr/RPb/Cb/B Y/Y/GVIDEO VIDEO OUT OUT IN REMOTE CONTROL SCART TV MODEL NO. DVD280 Made in China Maunfactured under license from Dolby Laboratories, Do

42、lby,and the double-D symbol are trademarks of Dolby Laboratories, Confidential unpublished works, 1992-1997 Dolby Laboratories. All rights reserved. RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION WARNING : SHOCK HAZARD - DO NOT OPEN AVIS : RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR CLASS 1 LASER PRODUCT

43、KLASS 1 LASER APPARAT LUOKAN 1 LASER LAITE KLASSE 1 LASER PRODUKT SERIAL NO. RISQUE DELECTROCUTION NE PAS OUVRIR ATTENTION c DTS and DTS Digital Out are trademarks of Digital Theater Systems Inc. AC INPUT 100-240V50/60Hz 20W Optical Digital Output Coaxial Digital Output Analog Audio Outputs S-Video

44、Output Component Video Outputs Composite Video Output SCART Out (TV) Remote Control Input Remote Control Output AC Power Cord Jack Region Code Optical Digital Output: Connect this jack to the optical digital input of an A/V receiver or surround proces- sor for Dolby Digital, DTS or PCM audio playbac

45、k. Coaxial Digital Output: Connect this jack to the coaxial digital input of an A/V receiver or surround proces- sor for Dolby Digital, DTS or PCM audio playback. NOTES: Connect either the Optical Digital Output or the Coaxial Digital Output to a corresponding digital audio input on your receiver or

46、 processor, but not both. The coaxial digital output should only be connected to a digital input. Even though it is the same RCA-type connector as standard analog audio connections, DO NOT connect it to a conventional analog input jack. Analog Audio Outputs: You may connect these outputs to the DVD

47、Audio inputs on your receiver or processor in addition to the optical or coaxial digital audio connection. You may also need to make these connec- tions if your receiver or processor does not have digital audio inputs, or if you are connecting the DVD280 directly to a television. S-Video Output: Con

48、nect this jack to the S-video input on a television or video projector, or to an S-video input on an A/V receiver or processor if you are using that type of device for S-video input switching. Component Video Outputs: These outputs carry the component video signals for connection to display mon- ito

49、rs with component video inputs. For standard analog TVs or projectors with inputs marked Y/Pr/Pb or Y/Cr/Cb, connect these outputs to the corre- sponding inputs. If you have a high- definition television or projector that is compatible with high-scan-rate progressive video (480P), connect these jacks to the HD component inputs. PROGRESSIVE must be selected in the Vi