HarmanKardon-CDR25-cd-sm维修电路原理图.pdf

harman/kardon CDR25 CDR26 Dual Tray CD-R/CD-RW Recorder/Player PRELIMINARY SERVICE MANUAL CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 2 SERVICING PRECAUTIONS . . . . . . . . . . . . . 3 ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . 5 SPECIAL NOTE ON CDR26 RECORDING. . . . 6 FRONT PANEL CONTROLS . . . . . . . . 7 FRONT PANEL DISPLAY . . . . . . . . . . 9 REAR PANEL CONNECTIONS. . . . . . . . . . . . 11 REMOTE CONTROL FUNCTIONS. . . . . . . 12 INSTALLATION/CONNECTIONS. . . . . . . . . 14 BASIC TROUBLESHOOTING GUIDE & WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . 17 BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . .19 DETAILED TROUBLESHOOTING GUIDE .24 WAVEFORMS. . . . . . . . . . . . . . . . . . . 47 EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . 49 MECHANICAL PARTS LIST. . . . . . . . . 52 ELECTRICAL PARTS LIST . . . . . . . . . .54 PCB DRAWINGS. . . . . . . . . . . . . . . . . . . . . 71 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . 74 ERROR MESSAGES . . . . 16 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 RadioFans.CN 收音机爱 好者资料库250 Crossways Park Drive,Woodbury, New York 11797 2002 Harman Kardon, Incorporated Part #3828R-A013SSignal FormatPlayback Sampling Frequency44.1kHzD/A Conversion96kHz, Multi-Bit Delta-Sigma Conversion Oversampling128 TimesPlayback SpecificationsFrequency Response2Hz 20,050HzPlayback S/N100dBPlayback Dynamic Range95dBPlayback THD0.01%/0dBAnalog Audio Output2V RMS, 2dBDigital-Coaxial Output0.5Vpp/75Headphone Output1V RMS/32 LoadRecord SpecificationsDigital Input Sample Rates32kHz 96kHzRecording S/N: Analog80dBRecording S/N: Digital Dub ModeEqual to SourceRecording S/N: Digital External SourceSource 10dBRecording Dynamic Range90dBRecording THD0.01%/0dBAnalog Input Sensitivity330mV RMS 47k = 0dBDigital Inputs (Direct Recording)44.1kHz, 100 ppm/min.GeneralPower Requirement110240 VAC/5060HzPower Consumption20 WattsDimensionsWidth17-5/16/440mmHeight4-7/16/112mmDepth13-15/16/355mmWeight13 lb/5.8kgDepth measurement includes knobs, buttons and connection jacks.Height measurement includes feet and chassis.All features and specifications are subject to change without notice.Harman Kardon and Power for the Digital Revolution are registered trademarks of Harman Kardon, Inc.DTS is a registered trademark of Digital Theater Systems, Inc.CDR 26 TECHNICAL SPECIFICATIONSRadioFans.CN 收音机爱 好者资料库2-3-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 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 pressure 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 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 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, 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 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 or other exposed skin.MagnetHow to hold the pick-upConductive SheetCotton swabPressurePressureDrop impact-4-NOTES 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,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 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 unit2) 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 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 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)Armband-5-ESD 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-cuits 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 electrostatic 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 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 devices 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 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 theprotective 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 motionsuch 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).CDR 26 SPECIAL NOTICE Under certain circumstances, the CDR 26 may operate differently than the description in the owners manual. In particular, the unit will not be able to make a digital recording from an external source such as a CD player, DVD player or MiniDisc (MD) player (as shown on page 20 of the owners manual) when that player blocks a special electrical signal, called “Sub-Q,” from the digital output. This signal contains some of the data needed to tell the CDR 26 that the original disc has started playing, and without it the CDR 26 cannot begin a recording. This is outside of our control, as some manufacturers design products this way to prevent digital copies from being made. Should you find that a digital recording cannot be made from an external playback source, you may always use an analog connection to make the copy by pressing the Input Select Button on the front panel or remote control until ANALOG appears in the Information Display. This does not affect the CDR 26s ability to make high-speed dubs using the units own internal playback deck, and in many cases you will not encounter this problem at all, since it is related to the brand of playback deck being used. 6FRONT-PANEL CONTROLS1 Power Switch: Press this switch to apply powerto the CDR 26.When the unit is first turned on, theStatus Mode Indicator 2 surrounding the switchwill turn green. Once the unit has been turned on withthis switch, it may be operated from either the frontpanel or remote control. Press the switch again to turnthe unit completely off.2 Status Mode Indicator: When the CDR 26 is inthe ON mode, this indicator will glow green.When theunit has been placed in the Standby mode by pressingthe Power-Off Buttonon the remote, the indi-cator will glow amber, indicating that the unit is stillconnected to the AC main supply and is ready to beturned on from the remote control.3 Play Deck: This disc deck is used to play backconventional CD discs and CD-R or CD-RW discs thathave been finalized.4 Headphone Jack: Connect standard headphonesto this jack for private listening.5 Headphone Level Control: Turn this control toadjust the volume level to the headphones. Note thatthe use of this control will not change the analog out-put levels at the rear-panel audio output .6 Play-Deck Open: Press this button to open thePlay Deck 3.7 Record Button: Press this button to begin therecording process. See pages 1922 for more infor-mation on CD recording.8 Synchronous Recording (CD Sync) Button:Press this button once to begin an automated record-ing of a single track from an external CD player whena digital connection is used. Press it twice to beginautomated recording of an entire disc. See page 20for more information on CD Sync recording.9 Dubbing: Press this button to begin the processof making a complete copy of the disc in the PlayDeck 3 to a CD-R or CD-RW disc in the RecordDeck %. See page 19 for more information on dubbing.) Speed: Press this button to select the recordingspeed for internal dubs. See page 19 for more infor-mation on selecting the proper speed.! Track Increment: Press this button duringrecording to insert a new track marker at that point in the recording.The current track number will beincremented by one. Erase: Press this button to erase one or moretracks or the entire contents of an unfinalized CD-RWdisc.When a CD-RW disc has already been finalizedyou may erase the entire disc or you may “unfinalize”the disc by erasing the TOC data. See page 21 formore information on erasing CD-RW discs.# Finalize: Press this button when a recording is complete to initiate the finalization process.ThePlay/Select Button j must be pressed withinthree seconds to activate finalization. Until this button is pressed and the finalization process is complete,CD-R discs may not be played on conventional CDmachines. See page 21 for more information on finalization.301 Power Switch2 Status Mode Indicator3 Play Deck4 Headphone Jack5 Headphone Level Control6 Play-Deck Open7 Record Button8 Synchronous Recording (CD Sync) Button9 Dubbing) Speed! Track Increment Erase# Finalize$ Record-Deck Open% Record Deck Optical Digital Input& Coaxial Digital Input* Analog-Record Level Control( Record-Deck Stop Record-Deck Play/Select Record-Deck Pause Record-Deck Program Button Record-Deck Next Record-Deck Previous Input Select Record-Deck Time Display Select Information Display Remote Sensor Play-Deck Time Display Select Continuous Play Play-Deck Next Play-Deck Previous Play-Deck Program Button? Play-Deck Pause? Play-Deck Play? Play-Deck StopSTOPCDR 26PLAYPAUSEPROGRAMTIMERecordPowerPhonesPhones LevelOptical InSync Rec.DubbingTrack Inc.SpeedEraseFinalizeTIMEINPUTPROGRAM21356789)!#$%*&4(PAUSEPLAY/SELECTSTOPCoaxial InAnalog Rec. LevelFRONT-PANEL CONTROLS57$ Record-Deck Open: Press this button to openthe Record Deck %.% Record Deck: This disc deck is used to recordor play back CD, CD-R and CD-RW discs. Optical Digital Input: This optical digital inputmay be used to connect a portable digital audio playerto the CDR 26 for digital recording. Remove the dustcap before connecting a cable to this jack. Keep thedust cap in a safe place and replace it when the cableis disconnected in order to prevent the possibility ofdust getting into the jack and damaging it.& Coaxial Digital Input: This coaxial digital inputmay be used to connect a portable digital audio playerto the CDR 26 for digital recording.* Analog-Record Level Control: The control isused to adjust the input level when making recordingsfrom analog sources such as cassettes, or when CDsare recorded in an analog mode. See page 21 formore information on record levels.( Record-Deck Stop: Press this button to stop theCD in the Record Deck. Record-Deck Play/Select: This button has twofunctions. It may be pressed when a standard CD is inthe Record Deck to put the machine in play, or it maybe used to enter a selection or start certain recordfunctions. Record-Deck Pause: When the Record Deck isin the Play mode, pressing this button will pause thedisc. If the disc has previously been paused, pressingthis button will restart the playback. Record-Deck Program Button: Press this but-ton to begin the programming sequence for theRecord Deck. See page 18 for more information onprogramming playlists on the CDR 26. Record-Deck Next: When a disc is playing in theRecord Deck %, press and hold this button to playthe disc in a fast-forward mode to quickly locate adesired passage.At any time, tapping the button andquickly releasing it will move to the next track on adisc in play. Record Deck Previous: This button has twofunctions.When a disc is playing in the Record Deck%, press and hold this button to play the disc in afast reverse mode to quickly locate a desired passage.At any time, tapping the button and quickly releasing itwill move to the beginning of the current track, andthe next press will move to the previous track.When adisc is stopped, each press will move back one forprogramming or play when