HarmanKardon-HK670-rec-sm1维修电路原理图.pdf
HK670 Integrated Amplifier PRELIMINARY Service Technical Manual Harman International SNC - Harman Consumer International 2, route de Tours 72500 Chteau du Loir FRANCE RadioFans.CN INTRODUCTION 3 Introduction Congratulations on your choice of the HarmanKardon HK670 Integrated Amplifier. In order to obtain the best performance from this integrated amplifier, please be sure to read this owners manual and use your integrated amplifier only in accordance with its instructions. The special features of this unit include: HCC (High Instantaneous Current Capability) The amplifier sections react rapidly to musical transients, providing the instantaneous current necessary to precisely drive and control nearly any loudspeaker system. Ultrawide Bandwidth The bandwidth of this unit is exceptionally wide and is independent of negative feedback.This improves transient accuracy and phase linearity. Low Negative Feedback This unit has been designed to have low distor- tion and wide bandwidth without high negative feedback.This further improves its dynamic accuracy. Discrete Component Circuitry In order to achieve the above goals, all discrete electronic circuitry has been employed. No avail- able integrated circuits could provide this high level of performance. Sophisticated Electronic Protection Circuitry HarmanKardons unique protection circuitry guards the amplifier from short circuit or dam- aged speakers and wires, without impairing sound quality by the use of current limiting or output relays. General instructions Always Use at 230V AC This unit is designed for operation with 230V AC. Use only domestic AC outlets. Connecting the unit to an outlet supplying a higher voltage may create a fire hazard. Handle the Power Cord Gently Do not disconnect the plug from the AC outlet by pulling the cord; always pull the plug itself. Pulling the cord may damage it. If you do not intend to use your unit for any considerable length of time, turn the unit off completely by pressing the round Power button above “Power” (see page 5). Do not place furniture or other heavy objects on the cord, and try to avoid drop- ping heavy objects on it.Also do not tie a knot in the power cord. Not only may the cord be damaged, it can also cause a short circuit with a consequent fire hazard. Place of installation Place the unit on a firm and level surface.Avoid installing your unit under the following condi- tions: I Moist or humid places. I Places exposed to direct sunlight or close to heating equipment. I Extremely cold locations. I Places subject to excessive vibration or dust. I Poorly ventilated places. Do not obstruct the ventilation slots on the top surface of the unit by placing objects on them. Otherwise, the temperature inside the unit may rise, possibly affecting its long-term reliability. Moving the Unit Before moving the unit, be sure to pull out the power cord from the AC outlet and disconnect the interconnection cords with other units. Do Not Open the Cabinet To prevent shock hazard, do not tamper with internal components for inspection or mainte- nance. HarmanKardon does not guarantee against performance degradation resulting from any modification. If water, a hairpin or wire acci- dentally enters the unit, immediately pull the plug from the AC outlet to prevent shock and consult an authorized HarmanKardon service station. If you use the unit under this condition, it may cause a fire shock hazard. Cleaning If the unit gets dirty, wipe it with a soft dry cloth. If necessary, wipe it with a soft cloth dampened with mild soapy water and then with a dry cloth. Never use benzene, thinner, alcohol or other volatile agents, and avoid spraying an insecticide near the unit. Warning Signs If you detect an abnormal smell or smoke, imme- diately turn the amplifier off and unplug the power cord. Contact your dealer or nearest HarmanKardon service center. Packaging Save all packing material. It is essential for ship- ping, should you move, or in the event the unit ever needs repair. RadioFans.CN 4CONNECTIONS Connections Connecting Other Components 1.Make sure your amplifier and other compo- nents are turned off. 2.Connect each components Output/Play jacks to the corresponding Input jacks on the back of your amplifier and, if available, the compo- nents Input/Record jacks to the Output jacks of the HK670. Use the white, black or gray plugs to connect Left channel jacks; use the red plugs for Right channel jacks. 3.A record player with MM cartridge must be connected to the Phono Input jacks and a separate ground wire to the ground terminal screw above. Wired Remote Control To control your amplifier with an external infrared remote sensor, connect the wire from the remote sensor to the REMOTE IN jack on the back panel. Or, if another stereo component has a built-in infrared remote sensor and a Remote Output jack, it may be possible to connect this jack to the REMOTE IN jack of your amplifier.All HarmanKardon products with Remote In and Remote Out jacks are compatible with one another, except for the Citation 22, 24 and 25. Other manufacturers remote sensors and com- ponents may not be compatible, but it will not hurt to experiment.A second wire may be used to connect your amplifiers REMOTE OUT jack to the Remote Input of another stereo component. Continue this process to include additional com- ponents (if compatible). Connecting Speakers 1.For best performance, use high quality speak- er cables. However, ordinary copper wire can be used if the gauge meets the following requirements: Wire Min. LengthDiameter Up to 2.5 meter1 mm Up to 4 meter1.25 mm Up to 6 meter1.6 mm Above 6 meter2-2.5 mm 2.Avoid rolling excess wire with or near signal interconnects. IMPORTANT:When connecting two pairs of speakers, determine the impedance of each pair by looking on the back of the speakers, in your owners manual, or by contacting your dealer or manufacturer. You can listen to two pairs of speakers at the same time ONLY if the impedance of EACH speaker is NOT LESS THAN 8 Ohms. WARNING: Do not play sets of speakers simul- taneously except as recommended above.Ampli- fier may overheat. Digital Loop-Through Digital inputs and outputs are provided only as a convenience for connecting various digital com- ponents to the “CD”,“CDR” and “AUX” digital inputs.The corresponding digital input signal is fed to the “DIGITAL OUT” connector when “CD”,“CDR” or “AUX” is selected as input source, to provide a digital signal for CD or MD Recorders.The HK670 cannot process, decode or convert any digital signal. AC Power Plug the cord into a 230 VAC wall socket. Record Player Cassette Tape Deck Speaker System 1 Left channel Compact Disc Player CD Recorder Speaker System 1 Right channel Video Player 2 Right channel Speaker System 2 Left channel Speaker System 2 Video Player 1Tuner RadioFans.CN CONTROLS AND FUNCTIONS 5 Controls and Functions Power switches Press the round Power button (above “Power”) to turn the amplifier on for the first time.The status LED behind the flat “Power” button will turn orange. Once the unit has been turned on with the round power button, this button should be left on for normal use and only turned off when the amplifier will not be used for extended periods of time (vacation, etc.). For daily use, press the flat “Power” button to turn the ampli- fier on or off (Standby). In Standby the LED will glow orange, indicating that the unit is still con- nected to AC mains and can be turned on from the remote control or with the flat “Power” but- ton. Headphone Jack Plug in headphones if desired.With both “Speaker 1” and “2” selectors in the Off posi- tion, output is supplied only to headphones. Speaker 1/2 Selectors Press to select speaker pair 1 or 2, or both, or neither (headphone output only). Input Source Selector Select desired input source for listening by press- ing the “Input Source”button repeatedly (on the left will select upwards,right downwards) until the indicator for the desired source is illuminated. Record Source Selector Select desired source for recording to device connected to the rear panel Tape and CDR Out sockets by pressing the “Record Source”button repeatedly until the indicator for the desired source is illuminated. Bass Control Turn to increase or decrease the amount of low frequency sound. Treble Control Turn to increase or decrease the amount of high frequency sound. Balance Control Turn to adjust relative output level of left and right speakers. Volume Control Turn to raise or lower output volume. Source Direct Press to bypass tone control circuitry. HK 670 HK 670 Indicates source selected for listening. Indicates source selected for recording. LED Power Mode indication Red= Protection Orange= Standby Green = ON Source Direct indicator lights up when “Source Direct” button has been pressed to bypass bass and treble controls. Speaker 1 and 2 indicators light up when the correspon- ding speaker pairs have been selected. 6REMOTE CONTROL Remote Control Independent Remote Control The system remote of the HK670 can control the amplifier and compatible Tuners,CD Players and CD Recorders.The remote In jack of units without an integrated IR receiver must be connected to the amplifiers remote control output jack so that the system remote control can operate them. The Function Table below will show all functions of the HK670 and external devices that can be controlled by the HK670 remote. Important Notes: For controlling a tuner (only needed for the numeric buttons), CD Recorder or CD Player the appropriate input (TUNER, CDR or CD) must have been selected with the source buttons of the remote control (selecting on the front panel is not sufficient). Note that DVD players or tape decks cannot be controlled by the remote. To control a compatible CD Recorder CDR must be selected as input and the drive to be controlled (CDP or CDR) must be selected appropriately with the CDP SELECT or CDR SELECT buttons. Operating Conditions The control unit operates effectively within a dis- tance of 7 meters and an angle of 30 from the amplifier. Using the control near fluorescent lights may shorten this range, as will any dust or dirt that accumulates on the front of the remote control or the remote sensor area of the amplifi- er.Also avoid blocking the line of sight between amplifier and remote. The control unit is powered by two AA batteries, included with your amplifier.When you replace weak batteries, replace both at the same time. When the remote is to be unused for an extend- ed period, remove the batteries to prevent dam- age from corrosion. 321 456 CDR OFF TV CD987 0AUX CDR TUNER SELECT RDS CDP PHONO TAPE TUNER VOLUME POWER HK 670 CD / CDR ButtonHK670CD PlayerCD Recorder Tuner POWER/OFFPower On/Off- II(Fast Forward)-Fast ForwardFast Forward- HH(Fast Reverse)-Fast ReverseFast Reverse- JH(Skip Reverse)-Skip ReverseSkip Reverse- IK(Skip Forward)-Skip ForwardSkip Forward- A (Stop)-StopStop- I(Play)-PlayPlay- 0 9 (Numeric Buttons)-Track SelectTrack SelectPreset Select CDSource Select- CDRSource Select- AUXSource Select- TVSource Select- TUNERSource Select- PHONOSource Select- TAPESource Select- CDP SELECT-CDP Drive Select 1)- CDR SELECT-CDR Drive Select 1)- RDS-RDS Display Select TUNERD-Tuning Up TUNERE-Tuning Down VOLUMEDVolume Up- VOLUMEEVolume Down- 1)Only needed with CD Recorders Remote button functions OPERATING INSTRUCTIONS 7 Operating Instructions Listening to your CD player, tape deck, tuner or other source 1.Turn Volume control to minimum level and press the round Power button (above ”Power”) to turn the unit to Standby, the power indicator below will light orange.Then press the flat Power switch to turn on the amplifier.The power indicator lights red for a few seconds, while the protection circuitry checks for short circuit or other problems, and then it lights green. 2.Press “Speaker 1” to hear loudspeakers con- nected to the rear Speakers 1 terminals. Press “Speaker 2” to hear loudspeakers connected to the rear Speakers 2 terminals. Press both to hear both speaker pairs at once.To listen to headphones only, press to turn off any active speaker pair. 3.Select desired source for listening by pressing the front panel Source button repeatedly until the indicator for the desired source is illumi- nated or by pressing the desired Source but- ton on the remote. 4.Begin playing the desired source. 5.Adjust the Volume control to the desired level. 6.Adjust Bass,Treble and Balance controls as desired (the Source Direct function must be turned off). 7.Press Source Direct until the Source Direct indicator lights up to bypass the tone control and balance circuitry to ensure purest sound performance. Press again to turn the bypass function off and to make the tone and balance controls function again. Making a recording You may record any source to tape or to CD-R or to both simultaneously.You may also connect a second tape deck to the CDR inputs and outputs to record from tape to tape (in either direction). To select the desired source for recording (this can be a different source than the one being listened to), press the Record Source button on the front panel repeatedly until the indicator for the desired record source is illuminated. NOTE:The record output signal is taken directly from the program source and is unaffected by the Volume, Bass,Treble or Balance controls. Important Notes: The functions Source Direct and Record Source can be selected on the front panel only, not from the remote control. 3-head cassette decks with monitoring func- tion can be connected to Tape or CDR connectors too, but their monitoring function cannot be used. 8TROUBLESHOOTING/SPECIFICATIONS Troubleshooting This unit is designed for trouble-free operation; most problems users encounter are due to operating errors. So if you have a problem, first check this list for a possible solution. If the problem persists, consult your authorized HarmanKardon service center. If the problem is.Make sure that. No lights illuminate when power cord is plugged into AC outlet. The unit is plugged into a live outlet. The round power button above Power on the front panel is pressed in. No sound is heard. Speaker switches corresponding to the desired speakers are pressed. Correct source button has been pressed. Volume is turned up. Speaker wires are connected properly. Hook-up wires to source component are connected properly. Sound is not heard from the speaker system on one side. The speaker wires and connection wires are connected correctly. The balance control knob is set to the center. When listening to stereo sound,the left and right sounds are reversed. The speaker wires are connected correctly. The wires between components are connected correctly. Intermittent or continuous buzzing or hissing. The unit is away from fluorescent lights,TV, motors and other electrical appliances. The remote control and front panel control
