JBL-DVD280-dvd-sm 维修电路原理图.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1SERVICING PRECAUTIONSNOTES REGARDING

3、 HANDLING OF THE PICK-UP1. Notes for transport and storage1) 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 notes1) The pick-up incorporates a strong magnet, and so should never

4、be brought close to magnetic materials.2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure andimpact. If it is subjected to strong pressure or impact, the result may be an operational malfunctionand/or damage to the printed-circuit board.3) Each an

5、d every pick-up is already individually adjusted to a high degree of precision, and for that reasonthe 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 switch ON the power t

6、o the laser output part (lens, etc.) of the pick-up if it is damaged.5) Cleaning the lens surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as usedfor camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore,

7、 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. (Donot use any other liquid cleaners, because they will damage the lens.) Take care not t

8、o use too much ofthis alcohol on the swab, and do not allow the alcohol to get inside the pick-up.Storage in conductive bagNEVER look directly at the laser beam, and dont let contactfingers or other exposed skin.MagnetHow to hold the pick-upConductive SheetCotton swabPressurePressureDrop impactRadio

9、Fans.CN 收音机爱 好者资料库2NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) 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 static electricity is high voltage,component

10、s 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 mustbe taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strongmagnetism is present

11、, or where there is excessive dust.2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.When removin

12、g the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This isbecause 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) Workers should be grounded by an armband (1M)6) Care should

13、 be taken not to permit the laser pick-up to come in contact with clothing, in order to preventstatic 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.Resistor(1 Mohm)ConductiveSheetResistor(1 Mohm

14、)Armband3DVD280 DVD280 3ESD PRECAUTIONSElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components com-monly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated cir-cui

15、ts and some field-effect transistors and semiconductor chip components. The following techniques shouldbe 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 offany ele

16、ctrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.2. After removing an electrical assembly equipped

17、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 solder or unsolder ESD devices.4. Use only an anti-static solder removal device. Some solder removal d

18、evices not classified as anti-staticcan generate electrical charges sufficient to damage ESD devices.5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDdevices.6. Do not remove a replacement ESD device from its protective package until immediately

19、before you areready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprot

20、ective 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 ALLOTHER SAFETY PRECAUTIONS.8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsu

21、ch 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).4DVD280 DVD280 DVD280 TECHNICAL SPECIFICATIONSApplicable Disc:Disc formats: 5-inch (12cm) or 3-inch (8cm) DVD-Video, standard conf

22、orming DVD-R, DVD+R, DVD-RW, DVD+RW, VCD, SVCD, CD, CD-R, MP3, WMA, JPEG or CD-RW discsRegion code: DVD Movie disc with Code shown on rear panel of unit onlyDVD-Layers: Single Side/Single Layer, Single Side/Dual Layer, Dual Side/Dual LayerAudio formats: Linear PCM, MPEG, MLP/CPPM Dolby Digital or DT

23、S Audio DiscsVideo Signal System:PAL and NTSCComposite Video Output:1V p-p/75 ohms, sync negative polarityS-Video Output:Y/Luminance: 1V p-p/75 ohms, sync negative polarityC/Chrominance: 0.286V p-pComponent Video Output:Y: 1V p-p/75 ohms, sync negative polarityPr: 0.7V p-p/75 ohmsPb: 0.7V p-p/75 ohm

24、sAnalog Audio Output:2V rms maxFrequency Response:DVD (Linear PCM): 2Hz 22kHz +0/0.5dB (48kHz sampling)2Hz 44kHz +0/0.5dB (96kHz sampling)CD: 2Hz 20kHz +0/0.5dBSignal/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

25、& Flutter:Below Measurable LimitsAC Power:110 240V/50 60HzPower Consumption:12 Watts (On)/20 Watts (Max)Dimensions (W x H x D):440mm x 89mm x 298mm (17-5/16 x 3-1/2 x 11-3/4)Weight:3.1kg (6.9 lb)Depth measurement includes knobs and connectors.Height measurement includes feet and chassis.All specific

26、ations subject to change without notice.JBL is a registered trademark of Harman International Industries, Incorporated.“Dolby”and the double-D symbol are trademarks of Dolby Laboratories. Confidential unpublished works. Copyright 1992-1997 Dolby Laboratories. All rights reserved.“DTS” is a registere

27、d trademark of Digital Theater Systems, Inc.Microsoft, Windows, Windows Media and WMA are either registered trademarks or trademarks of Microsoft Corporation inthe United States and/or other countries.Kodak and Photo CD are trademarks of Eastman Kodak Company.This product incorporates copyright prot

28、ection technology that is protected by method claims of certain U.S. patents andother intellectual property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protectiontechnology must be authorized by Macrovision Corporation and is intended for home and other lim

29、ited viewing uses onlyunless otherwise authorized by Macrovision Corporation. Reverse engineering or disassembly is prohibited.DVD280 OM 7/12/04 4:42 PM Page 475DVD280 DVD280 11FRONT-PANEL CONTROLSV I D E ODVD280 High Performance DVD/CD PlayerStandbyDimmerTest2345Power17689)!#JPEGVCDDVDWMAMP3 PROG R

30、ANDOM REPEAT 1 ALL A-B V.OFF TEST P.SCANTITLE TRACK CHAPTER PBC HOUR MIN SEC?Main Power On/Off: Press thisswitch to apply power to the DVD280.Once the unit has been turned on withthis switch, the Power Indicator2will light up in red, and the DVD280may be turned on from either the frontpanel or remot

31、e control. Press theswitch again to turn the unit com-pletely off.1Power On/Off (Standby): Press thebutton once to turn the DVD280 on,and the Power Indicator2will turnorange. Press it again to put the unitin the Standby mode and the PowerIndicator2will turn back to red.Note that in order for this sw

32、itch tooperate, the Main Power Switch?must be pressed in so that it is in theON position.2Power Indicator: This LED will beilluminated in red when the unit is inthe Standby mode to signal that theunit is ready to be turned on. Whenthe unit is in operation, the indicatorwill turn orange.3Disc Drawer:

33、 This drawer is usedto hold the discs played in the unit. Be certain to seat all discs carefullywithin the recess in the drawer. Donot press down on the drawer when it is open, to avoid damage to theplayer.4Eject: Press this button to open orclose the disc tray.5Play: Press to initiate playback orto

34、 resume playback after the PauseButton69has been pressed.6Pause: Press this button tomomentarily pause playback. Toresume playback, press the buttonagain. If a DVD is playing, action willfreeze and a still picture will be dis-played when the button is pressed. 7Stop: Press this button once toplace t

35、he disc in the Resume mode.Playback will stop, but as long as the tray is not opened or the discchanged, DVD playback will continuefrom the same point on the disc whenthe Play Button5Bis pressedagain. Resume will also work if theunit was turned off. To stop a disc andhave play start from the beginni

36、ng,press the button twice.8Skip (Previous): Press this buttonto move backward through the musictracks on a CD or the chapters on a DVD.9Skip (Next): Press to move for-ward through the music tracks on aCD or the chapters on a DVD.!Dimmer: Press this button toreduce the brightness of the MainInformati

37、on Display#by 50% or toturn the display off completely in thefollowing order: FULL BRIGHTNESS HALF BRIGHTNESS OFF FULLBRIGHTNESS.BTest: Press this button to display a test picture on the screen, whichenables you to optimally adjust thecolor parameters on your video dis-play, such as brightness, cont

38、rast,color intensity and tint.#Main Information Display: Thisdisplay delivers messages and statusinformation to help you operate theDVD player. See page 12 for a com-plete explanation of the display.?Main Power On/Off1Power On/Off (Standby)2Power Indicator3Disc Drawer4Eject5Play6Pause7Stop8Skip (Pre

39、vious)9Skip (Next)!DimmerBTest#Main Information DisplayDVD280 OM 7/12/04 4:41 PM Page 116DVD280 DVD280 12FRONT-PANEL INFORMATION DISPLAYQPONM L KJIHG FBCJPEGVCDDVDWMAMP3 PROG RANDOM REPEAT 1 ALL A-B V.OFF TEST P.SCANTITLE TRACK CHAPTER PBC HOUR MIN SECADEFFA Disc-Type IndicatorsB Playback-Mode Indic

40、atorsC Title Number IndicatorsD Chapter/Track Number IndicatorsE Time IndicatorsF Hour/Minute/Second IndicatorsG Progressive Scan IndicatorH Parental Lock IndicatorI Angle IndicatorJ Test IndicatorK V-OFF IndicatorL VCD Playback Control IndicatorM A-B Repeat IndicatorNChapter/Track/Title IndicatorsO

41、 Repeat IndicatorsP Random IndicatorQ Program IndicatorA Disc-Type Indicators: The DVD,CD, JPEG, MP3, VCD or WMA indica-tor will light to show the type of disccurrently being played.B Playback-Mode Indicators: Theseindicators light to show the currentplayback mode: Lights when a disc is playing in t

42、henormal mode.Lights when the disc is in the FastSearch Forward mode. The on-screenbanner display indicates the selectedspeed (2x, 16x, 64x, 200 x). The third triangle will light when the searchspeed reaches 16x, and will remain lit if the speed is increased to 64x or 200 x.Lights when the disc is p

43、aused.Lights when the disc is in the FastSearch Reversemode. The on-screenbanner display indicates the selectedspeed (2x, 16x, 64x, 200 x). The third triangle will light when the searchspeed reaches 16x, and will remain lit if the speed is increased to 64x or 200 x.Note that the fast-search speedsab

44、ove are for DVDs only. Fast-searchis also available for VCDs, SVCDs andCDs, but only at two speeds, 4x and32x. Fast-search is not available forMP3s or WMAs.C Title Number Indicators: Thesetwo positions in the display will showthe current title number when a DVDdisc is playing.D Chapter/Track Number

45、Indicators:When a DVD disc is playing, thesetwo positions in the display will showthe current chapter. When a CD isplaying, they will show the currenttrack number.E Time Indicators: These positionsin the display will show the runningtime of a disc in play. When a DVD isplaying, these indicators will

46、 showthe time elapsed or remaining for thecurrent chapter or title. When a CD,VCD or SVCD is playing, these indica-tors will show the time elapsed orremaining for the current track ordisc. When an MP3 or WMA file isplaying, these indicators will showthe elapsed time for the current file.See page 35

47、for more information onthe time display.NOTE: The indicators CDE willalso display text messages about the DVD280s status, includingREADING when a disc is loading,and DISC ERROR when a disc isnot compatible with the DVD280.F Hour/Minute/Second Indicators:These indicators are used with theTime Indicat

48、ors E to show current,remaining or total time.G Progressive Scan Indicator: Thisindicator lights when the DVD280sprogressive scan video outputs areactivated.H Parental Lock Indicator: This indi-cator lights when the parental locksystem is engaged in order to preventanyone from changing the rating le

49、velwithout a code.I Angle Indicator: This indicatorblinks when alternative viewingangles are available on the DVD currently playing.J Test Indicator: This indicator lightswhen the video test screen is activated.K V-OFF Indicator: This indicatorlights when the units video outputhas been turned off by

50、 pressing theVideo Off ButtonEon the remotecontrol.L VCD Playback Control Indicator:This indicator lights when the play-back control function is turned on for VCDs.M A-B Repeat Indicator: This indica-tor lights when a specific passage forrepeat playback has been selected.N Chapter/Track/Title Indica