HarmanKardon-CDR20-cd-sm维修电路原理图.pdf

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1、harman/kardon Model CDR20 Dual Tray CD/CD-R/CD-RW Recorder/Player SERVICE MANUAL CONTENTS SERVICING PRECAUTIONS . . . . . . . . . . . . .2 ESD PRECAUTIONS. 4 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . .5 FRONT PANEL CONTROLS . . . . . . . . 6 FRONT PANEL DISPLAY . . . . . . . . . . 8

2、 REAR PANEL CONNECTIONS. . . . . . 10 REMOTE CONTROL FUNCTIONS. . . . . . . 11 INSTALLATION/CONNECTIONS. .13 BASIC TROUBLESHOOTING GUIDE. 14 SPECIAL NOTES ON CDR20 RECORDING 15 BULLETIN HK2001-04.16 BULLETIN HK2001-06. . . . . . . . . 17 DETAILED TROUBLESHOOTING GUIDE .19 BLOCK DIAGRAMS . . . . . .

3、. . . . . . . . . . . . .36 EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . 39 MECHANICAL PARTS LIST. . . . . . . . . 42 ELECTRICAL PARTS LIST . . . . . . . . . .44 PCB DRAWINGS. . . . . . . . . . . . . . . . . . . . . 65 SCHEMATIC DIAGRAMS . . . . . . 71 WIRING DIAGRAM.85 harman/kardon, Inc.

4、 250 Crossways Park Dr. Woodbury, New York 11797 RadioFans.CN 收音机爱 好者资料库-3-SERVICING PRECAUTIONSNOTES REGARDING 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

5、to external pressure or impact.2. Repair notes1) 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 andimpact. If it is subjected to strong pressu

6、re or impact, the result may be an operational malfunctionand/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 reasonthe adjustment point and installation screws should absolutely never be touched.4) Laser b

7、eams 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 surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (

8、such as usedfor camera lens). The lens is held by a delicate spring. When cleaning the lens 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 alcoho

9、l to the cotton swab. (Donot use any other liquid cleaners, because they will damage the lens.) Take care not to 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

10、 or other exposed skin.MagnetHow to hold the pick-upConductive SheetCotton swabPressurePressureDrop impact2 CDR20 CDR20 harman/kardonharman/kardonRadioFans.CN 收音机爱 好者资料库-4-NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pi

11、ck-up (laser diode). These compo-nents 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 many optical components and other high-p

12、recision components. Care mustbe taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strongmagnetism is present, or where there is excessive dust.2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the un

13、it2) 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 isbecause there is the possibility of damage by static elec

14、tricity.)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 preventstatic electricity changes in the clothing to escape

15、 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)Armband3 C CD DR R20 20 h ha ar rmmanan/kar/kardondon-5-ESD PRECAUTIONSElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) d

16、evices 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-cuits and some field-effect transistors and semiconductor chip components. The following techniques shouldbe used to

17、help reduce the incidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially avai

18、lable 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 with ESD devices, place the assembly on a conductive sur-face such as aluminum foil, to prevent electrostatic char

19、ge 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-staticcan generate electrical charges sufficient to damage ESD devices.5. Do not use

20、 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 before you areready to install it. (Most replacement ESD devices are packaged with leads electrically shorted toge

21、ther byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which the device will by installed.CAUTION : BE SURE NO PO

22、WER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALLOTHER SAFETY PRECAUTIONS.8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen-erate

23、 static electricity sufficient to damage an ESD device).4 C CD DR R20 20 h ha ar rmmanan/kar/kardondonCDR20 SPECIFICATIONS Playback Sampling Frequency 44.1 kHz D/A Conversion 96kHz, Multi-Bit Delta-Sigma Conversion Oversampling 128 Times Playback Specifications Frequency Response 2Hz 20,050Hz Playba

24、ck S/N 105dB Playback Dynamic Range 105dB Playback THD 0.005% / 88dB Analog Audio Output 2V RMS, 2dB Digital-Coaxial Output 0.5 Vpp/75 Headphone Output 1V RMS/32Load Record Specifications Digital Dubbing Mode(X1/X2/X4) Equal to source Digital Input Sample Rate 32kHz 96kHz Signal/Noise Ratio - Analog

25、 91dB Signal/Noise Ratio - External(Source) source-10dB Dynamic Range 91dB THD 0.005%/-85dB Analog Input Sensitivity 330 mV RMS 47k= 0dB Digital Inputs (Direct Recording) 44.1kHz, 100 ppm/min. General Power Requirement 100240V AC, 50/60Hz Power Consumption 28 Watts Dimensions Height 4.4/112mm Width

26、17.3/440mm Depth 14.2/363mm Weight 10.5 lb/4.7 kg 5 CDR20 CDR20 harman/kardonharman/kardon1 Power Switch: Press this switch to applypower to the CDR 20.When the unit is firstturned on, the Status-Mode Indicator 2surrounding the switch will turn green. Oncethe unit has been turned on with this switch

27、, itmay be operated from either the front panel orremote control. Press the switch again to turnthe unit completely off.2 Status-Mode Indicator: When the CDR20 is in the ON mode, this indicator will glowgreen.When the unit has been placed in theStandby mode by pressing the Power-Off but-tonon the re

28、mote, the indicator will glowamber, indicating that the unit is still connectedto the AC main supply and is ready to beturned on from the remote control.3 Play Deck: This disc deck is used to playback conventional CD discs and CD-R or CD-RW discs that have been finalized.4 Headphone Jack: Connect st

29、andard head-phones to this jack for private listening.5 Headphone Level Control: Turn this control to adjust the volume level to the head-phones. Note that the use of this control willnot change the analog output levels at therear-panel audio outputs .6 Digital Input: This coaxial digital inputmay b

30、e used to connect a portable digital audioplayer to the CDR 20 for digital recording.When an active digital signal is connected toboth the front- and rear-panel coaxial inputs,the source connected to the front-panel inputwill be selected for recording.7 Play-Deck Open: Press this button toopen the P

31、lay Deck 3.8 Record Button: Press this button to beginthe recording process. See pages 20-22 formore information on CD recording.9 CD Sync: Press this button once to beginan automated recording of a single track froman external CD player when a digital connec-tion is used. Press it twice to begin au

32、tomatedrecording of an entire disc. See page 21 formore information on CD Sync recording.) Dubbing: Press this button to begin theprocess of making a complete copy of the discin the Play Deck 3 to a CD-R or CD-RW discin the Record Deck %. See page 20 for moreinformation on dubbing.! Erase: Press thi

33、s button to erase one ormore tracks or the entire contents of an unfi-nalized CD-RW disc.When a CD-RW disc hasalready been finalized you may erase the entiredisc or you may “unfinalize” the disc by erasingthe TOC data. See page 22 for more informa-tion on erasing CD-RW discs.32Front-Panel Controls1

34、Power Switch2 Status-Mode Indicator3 Play Deck4 Headphone Jack5 Headphone Level Control6 Digital Input7 Play-Deck Open8 Record Button9 CD Sync) Dubbing! Erase Finalize# Speed$ Record-Deck Open% Record Deck Analog-Record Level Control& Record-Deck Stop* Record-Deck Play/Select( Record-Deck Pause Reco

35、rd-Deck Next Record-Deck Previous Input Select Record-Deck Display Select Information Display Remote Sensor Play-Deck Display Select Dual-Play Selector Play-Deck Next Play-Deck Previous Play-Deck Pause Play-Deck Play Play-Deck Stop21356789)!#$%4&*(?06 C CD DR R20 20 h ha ar rmmanan/kar/kardondonFron

36、t-Panel Controls Finalize: Press this button when a record-ing is complete to initiate the finalizationprocess. The Play/Select Button *jmust be pressed within three seconds to acti-vate finalization. Until this button is pressedand the finalization process is complete, CD-Rdiscs may not be played o

37、n conventional CDmachines. See page 22 for more information onfinalization.# Speed: Press this button to select therecording speed for internal dubs. See page 20for more information on selecting the properspeed.$ Record-Deck Open: Press this button toopen the Record Deck %.% Record Deck: This Disc D

38、eck is used torecord or play back CD, CD-R and CD-RW discs. Analog-Record Level Control: The con-trol is used to adjust the input level when mak-ing recordings from analog sources such as cas-settes, or when CDs are recorded in an analogmode. See page 22 for more information onrecord levels.& Record

39、-Deck Stop: Press this button tostop the CD in the Record Deck.* Record-Deck Play/Select: This buttonhas two functions. It may be pressed when astandard CD is in the Record Deck to put themachine in play, or it may be used to enter aselection or start certain record functions.( Record-Deck Pause: Wh

40、en the RecordDeck is in the Play mode, pressing this buttonwill pause the disc. If the disc has previouslybeen paused, pressing this button will restartthe playback. Record-Deck Next: When a disc is play-ing in the Record Deck %, press and hold thisbutton to play the disc in a fast-forward modeto qu

41、ickly locate a desired passage.At any time,tapping the button and quickly releasing it willmove to the next track on a disc in play. Record Deck Previous: This button hastwo functions.When a disc is playing in theRecord Deck %, press and hold this button toplay the disc in a fast reverse mode to qui

42、cklylocate a desired passage.At any time, tappingthe button and quickly releasing it will move tothe beginning of the current track, and the nextpress will move to the previous track.When adisc is stopped, each press will move back onefor programming or play when the disc isstopped. Once a track is

43、entered, it may beplayed by simply pressing the Play button *j. Input Select: Press this button to selectthe input source (analog or digital coax) forrecording. See page 22 for more information oninput selection. Record-Deck Display Select: Press thisbutton to cycle through the time display optionsf

44、or the Record Deck. See page 17 for moreinformation on the time display. Information Display: The indicators inthe Information Display provide status reportson the operation of the CDR 20. See page 7 forcomplete explanations of each indicator. Remote Sensor: The IR sensor thatreceives the commands f

45、rom the remote controlis behind this area. Do not cover or obscure thispart of the front panel to avoid any malfunctionwith the remote. Play-Deck Display Select: Press this but-ton to cycle through the time display optionsfor the Play Deck. See page 17 for more infor-mation on the time display. Dual

46、-Play Selector: Press this button toenable both CD decks to play at the same timeand function as separate, independent CDunits. In this mode it is also possible to recordfrom an external source while the Play Deck isfunctioning as a standard CD player. See page17 for more information on dual-play ca

47、pability. Play-Deck Next: When a disc is playing inthe Play Deck 3, press and hold this button toplay the disc in a fast-forward mode to quicklylocate a desired passage.At any time, tappingthe button and quickly releasing it will move tothe next track on a disc in play. Play-Deck Previous: This butt

48、on has twofunctions.When a disc is playing in the PlayDeck 3, press and hold this button to play thedisc in a fast-reverse mode to quickly locate adesired passage.At any time, tapping the but-ton and quickly releasing it will move to thebeginning of the current track, and the nextpress will move to

49、the previous track.When adisc is stopped, each press will move back onetrack for programming or play when the disc isstopped. Once a track is entered, it may beplayed by simply pressing the Play buttonj. Play-Deck Pause: When the Play Deck isrunning, pressing this button will pause thedisc. If the d

50、isc has previously been paused,pressing this button will restart the playback. Play-Deck Play: Press this button to beginplayback of a CD in the Play Deck or the dub-bing process. Play-Deck Stop: Press this button to stopthe CD in the Play Deck.7 C CD DR R20 20 h ha ar rmmanan/kar/kardondonFront-Pan