User manual DENON DRA-685

AM-FM STEREO RECEIVER DRA- 685 OPERATING INSTRUCTIONS MODE D'EMPLOI CD AUDIO POWER TV VCR MD/CD-R VIDEO DVD/VDP RECEIVER ON PHONO OFF MULTI VCR CD DVD/VDP V.AUX B PRECISION AUDIO COMPONENT / AM-FM STEREO RECEIVER DRA-685 VOLUME MULTI VOL. TAPE MONITOR TUNER SHIFT OFF POWER ON CD PHONO 6 REMOTE SENSOR 7 PHONO CHANNEL CD DVD/VDP DECK·VCR 0 AUTO DVD / VDP TUNER 2 0 VCR V.AUX TAPE MONITOR . TUNER CD·MD/CDR·DVD/VDP DISC SKIP+ TUNER TITLE V. AUX VCR ON / STANDBY PRESET 8 VOLUME 3 9 TAPE MONITOR TUNING DOWN UP BAND MODE MEMORY SHIFT 1 2 3 4 5 6 7 8 6 SP-A 2 7 SP-B B RC-873 MULTI SOURCE REMOTE CONTROL UNIT SET UP MENU VOLUME BASS ON / STANDBY TREBLE BALANCE VIDEO SELECT SELECT STATUS MUTING DISPLAY PHONES A SPEAKER B VIDEO SELECT MULTI SOURCE MODE SELECT TONE DEFEAT LOUDNESS RETURN CHANNEL L R TV VOLUME B REMOTE CONTROL UNIT RC-872 FOR ENGLISH READERS PAGE 02 ~ PAGE 29 POUR LES LECTEURS FRANCAIS PAGE 2, 30 ~ PAGE 55 2 We greatly appreciate your purchase of this unit. 2 To be sure you take maximum advantage of all the 2 Nous vous remercions pour l'achat de cet appareil. 2 Pour être sûr de profiter au maximum de toutes les features this unit has to offer, read these instructions carefully and use the set properly. Be sure to keep this manual for future reference should any questions or problems arise. "SERIAL NO. PLEASE RECORD UNIT SERIAL NUMBER ATTACHED TO THE REAR OF THE CABINET FOR FUTURE REFERENCE" caractéristiques qu'offre cet appareil, lire avec soin ces instructions et bien utiliser l'appareil. Toujours conserver ce mode d'emploi pour s'y référer ultérieurement en cas de question ou de problème. "NO. DE SERIE PRIERE DE NOTER LE NUMERO DE SERIE DE L'APPAREIL INSCRIT A L'ARRIERE DU COFFRET DE FAÇON A POUVOIR LE CONSULTER EN CAS DE PROBLEME." ENGLISH FRANCAIS 2 SAFETY PRECAUTIONS CAUTION TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ATTENTION POUR ÉVITER LES CHOCS ÉLECTRIQUES, INTERODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU' AU FOND. CAUTION: REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. 2 NOTE ON USE / OBSERVATIONS RELATIVES A L'UTILISATION · Keep the set free from moisture, water, and dust. · Protéger l'appareil contre l'humidité, l'eau et la poussière. · Avoid high temperatures. Allow for sufficient heat dispersion when installed on a rack. · Eviter des températures élevées Tenir compte d'une dispersion de chaleur suffisante lors de l'installation sur une étagère. · Do not let foreign objects in the set. · Ne pas laisser des objets étrangers dans l'appareil. · Unplug the power cord when not using the set for long periods of time. · Débrancher le cordon d'alimentation lorsque l'appareil n'est pas utilisé pendant de longues périodes. · Do not let insecticides, benzene, and thinner come in contact with the set. · Ne pas mettre en contact des insecticides, du benzène et un diluant avec l'appareil. · Handle the power cord carefully. Hold the plug when unplugging the cord. · Manipuler le cordon d'alimentation avec précaution. Tenir la prise lors du débranchement du cordon. * (For sets with ventilation holes) · Do not obstruct the ventilation holes. · Ne pas obstruer les trous d'aération. · Never disassemble or modify the set in any way. · Ne jamais démonter ou modifier l'appareil d'une manière ou d'une autre. 2 SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. 6. 7. Read Instructions ­ All the safety and operating instructions should be read before the product is operated. Retain Instructions ­ The safety and operating instructions should be retained for future reference. Heed Warnings ­ All warnings on the product and in the operating instructions should be adhered to. Follow Instructions ­ All operating and use instructions should be followed. Cleaning ­ Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Attachments ­ Do not use attachments not recommended by the product manufacturer as they may cause hazards. Water and Moisture ­ Do not use this product near water ­ for example, near a bath tub, wash bowl, kitchen sink, or laundry tub; in a wet basement; or near a swimming pool; and the like. Accessories ­ Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall, causing serious injury to a child or adult, and serious damage to the product. Use only with a cart, stand, tripod, bracket, or table recommended by the manufacturer, or sold with the product. Any mounting of the product should follow the manufacturer's instructions, and should use a mounting accessory recommended by the manufacturer. A product and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the product and cart combination to overturn. Ventilation ­ Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of the product and to protect it from overheating, and these openings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface. This product should not be placed in a built-in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer's instructions have been adhered to. Power Sources ­ This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your home, consult your product dealer or local power company. For products intended to operate from battery power, or other sources, refer to the operating instructions. Grounding or Polarization ­ This product may be equipped with a polarized alternating-current line plug (a plug having one blade wider than the other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug. FIGURE A EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE 13. 15. 16. 8. 17. 9. 18. 19. 10. 20. 21. 11. 12. 22. ANTENNA LEAD IN WIRE 23. GROUND CLAMP ANTENNA DISCHARGE UNIT (NEC SECTION 810-20) ELECTRIC SERVICE EQUIPMENT 24. 25. GROUNDING CONDUCTORS (NEC SECTION 810-21) GROUND CLAMPS POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250, PART H) Power-Cord Protection ­ Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the product. Outdoor Antenna Grounding ­ If an outside antenna or cable system is connected to the product, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. See Figure A. Lightning ­ For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the product due to lightning and power-line surges. Power Lines ­ An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits, or where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits as contact with them might be fatal. Overloading ­ Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result in a risk of fire or electric shock. Object and Liquid Entry ­ Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product. Servicing ­ Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel. Damage Requiring Service ­ Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions: a) When the power-supply cord or plug is damaged, b) If liquid has been spilled, or objects have fallen into the product, c) If the product has been exposed to rain or water, d) If the product does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation, e) If the product has been dropped or damaged in any way, and f) When the product exhibits a distinct change in performance ­ this indicates a need for service. Replacement Parts ­ When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards. Safety Check ­ Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition. Wall or Ceiling Mounting ­ The product should be mounted to a wall or ceiling only as recommended by the manufacturer. Heat ­ The product should be situated away from heat sources such as radiators, heat registers, stoves, or other products (including amplifiers) that produce heat. NEC - NATIONAL ELECTRICAL CODE 3 ENGLISH 2 INTRODUCTION Thank you for choosing the DENON AM-FM Stereo receiver. This remarkable component has been engineered to provide outstanding high fidelity reproduction of your favorite music sources. As this product is provided with an immense array of features, we recommend that before you begin hookup and operation that you review the contents of this manual before proceeding. TABLE OF CONTENTS z x c v b n m Before Using ..................................................................4 Cautions on Installation ......................................................5 Cautions on Handling.........................................................5 Features ........................................................................5 Connections ...............................................................6~10 Part Names and Functions ..........................................10, 11 Remote Control Unit...................................................12~17 , . /0 /1 /2 /3 Operations ...............................................................17~23 Listening to the Radio ................................................24~26 Initialization of the Microprocessor ....................................27 Last function memory ......................................................27 Troubleshooting ............................................................28 Specifications ...............................................................29 2 ACCESSORIES Check that the following parts are included in addition to the main unit: q w e r Operating instructions ...................................................1 Warranty .....................................................................1 Service station list .........................................................1 Remote control unit (RC-872) ..........................................1 (RC-873) ..........................................1 r t t Batteries (R6P/AA) .........................................................2 (R03/AAA) ......................................................2 y AM loop antenna .........................................................1 u FM indoor antenna.........................................................1 y u 7 6 0 2 0 9 B 3 8 2 7 6 B (RC-872) (RC-873) 1 BEFORE USING Pay attention to the following before using this unit: · Moving the set To prevent short circuits or damaged wires in the connection cords, always unplug the power cord and disconnect the connection cords between all other audio components when moving the set. · Before turning the power operation switch on Check once again that all connections are proper and that there are not problems with the connection cords. Always set the power operation switch to the standby position before connecting and disconnecting connection cords. · Store this instructions in a safe place. After reading, store this instructions along with the warranty in a safe place. · Note that the illustrations in this instructions may differ from the actual set for explanation purposes. 4 ENGLISH 2 CAUTIONS ON INSTALLATION 10 cm or more Noise or disturbance of the picture may be generated if this unit or any other electronic equipment using microprocessors is used near a tuner or TV. If this happens, take the following steps: · Install this unit as far as possible from the tuner or TV. · Set the antenna wires from the tuner or TV away from this unit's power cord and input/output connection cords. · Noise or disturbance tends to occur particularly when using indoor antennas or 300 /ohms feeder wires. We recommend using outdoor antennas and 75 /ohms coaxial cables. For heat dispersal, leave at least 10 cm of space between the top, back and sides of this unit and the wall or other components. B 10 cm or more Wall 3 CAUTIONS ON HANDLING · Switching the input function when input jacks are not connected A clicking noise may be produced if the input function is switched when nothing is connected to the input jacks. If this happens, either turn down the VOLUME control or connect components to the input jacks. · Muting of PRE OUT jacks The PRE OUT jacks include a muting circuit. Because of this, the output signals are greatly reduced for several seconds after the power operation switch is turned on. If the volume is turned up during this time, the output will be very high after the muting circuit stops functioning. Always wait until the muting circuit turns off before adjusting the volume. · Whenever the power operation switch is in the STANDBY state, the apparatus is still connected on some AC line voltages. Please be sure to unplug the cord when you leave home for, say, a vacation. 4 FEATURES 1. Multi Room Music Entertainment System Multi Source Function: This unit's Multi Source function lets you select different audio or video sources for viewing or listening Different sources can thus be enjoyed in the main room and the subroom simultaneously. This novel feature gives you considerable flexibility when setting up and enjoying your system with the this unit. The output level, adjustable by the remote commander, is as much as 1V, enough to operate the optional power amplifier placed in a subroom. 2. Powerful, Versatile Amplifier High-Quality Power Amplifier: High-speed, high-power transistors employed in a rational circuit configuration reflect DENON'S advanced amplifier technology and ensure a very hefty, clean power output. 3. Signal Level Divided Construction (SLDC) The circuits handling low-level and high-level signals have been divided into separate blocks to ensure that influences from these signals on each other are held to an absolute minimum. This chassis design in the this unit is called the Signal Level Divided Construction (SLDC). Signals for output are cleaner than before, allowing them to be reproduced with even greater fidelity and clarity. 4. Remote Control Functions · Remote Control unit with pre-memory function (RC-872): This unit comes with a remote control unit equipped with a pre-memory function. The remote control command codes for DENON remote controllable AV components as well as for DVD players, video decks, TVs, etc., of other major manufacturers are prestored in the memory. · Multi Source Remote Control Unit (RC-873): This unit comes with the Multi Source Remote Control Unit, which operates the Multi Source Output and commands the receiver to select the function, recalling preset stations, and adjust the volume level from a subroom. 5 ENGLISH 5 CONNECTIONS · Do not plug in the power cord until all connections have been completed. · Be sure to connect the left and right channels properly (left with left, right with right). · Insert the plugs securely. Incomplete connections will result in the generation of noise. · Use the AC OUTLETS for audio equipment only. Do not use them for hair driers, etc. · Note that binding pin plug cords together with power cords or placing them near a power transformer will result in generating hum or other noise. · If hum or other noise is produced when the ground wire is connected, disconnect it. · Noise or humming may be generated if a connected component is used independently without turning the power of this unit on. If this happens, turn on the power of the this unit. Connecting the audio components OUTPUT Turntable (MM cartridge) NOTE: This unit cannot be used with MC cartridges directly. Use a separate head amplifier or stepup transformer. R L CD player Connecting a CD player DIGITAL AUDIO R L Connect the CD player's analog output jacks (ANALOG OUTPUT) to this unit's CD jacks using pin plug cords. LINE OUT PRE OUT jacks MAIN IN jacks Use these jacks when using another separate amplifier or a pre-main amplifier. AC CORD AC 120 V, 60 Hz Ground wire R L PHONO SIGNAL GND LOOP ANT. AM R L CD IN VIDEO OUT MONITOR PRE OUT DVD / VDP MAIN IN V.AUX IN SPEAKER SYSTEMS AC OUTLETS VCR MULTI SOURCE OUT VCR IN ROOM TO ROOM (REMOTE CONTROL) AUDIO R L R FM COAX. 75 DVD / VDP V.AUX VCR L LINE OUT R B L R A L L TAPE ANTENNA OUT MULTI SOURCE R VCR TAPE + + SWITCHED TOTAL 120W(1A.) MAX. 120V 60Hz IMPEDANCE A or B : 4 16 A + B : 8 16 - R R L AUDIO R L R L L OUT AUX OUT LINE IN LINE IN Tape deck R L R L Sub room RC-617 (Sold Separately) Infrared sensor + + RC-616 (Sold Separately) Infrared retransmitter R L R L OUTPUT INPUT OUTPUT INPUT Power amplifier Connecting a tape deck Connections for recording: Connect the tape deck's recording input jacks (LINE IN or REC) to this unit's tape recording (OUT) jacks using pin plug cords. Connections for playback: Connect the tape deck's playback output jacks (LINE OUT or PB) to this unit's tape playback (IN) jacks using pin plug cords. Connecting the AC OUTLETS AC OUTLETS · SWITCHED (total capacity ­ 120 W (1 A.) The power to this outlet is turned on and off in conjunction with the POWER operation switch on the main unit, and when the power is switched between on and standby from the remote control unit. No power is supplied from these outlets when this unit's power is at standby. Never connect equipment whose total capacity is above 120 W (1 A.) NOTE: Use the AC OUTLETS for audio equipment only. Do not use them for hair driers, etc. 6 ENGLISH Connecting the video equipments · To connect the video signal, connect using a 75 /ohms video signal cable cord. Using an improper cable can result in a drop in sound quality. · When making connections, also refer to the operating instructions of the other components. TV or DBS tuner AUDIO R OUT Connecting a TV/DBS tuner TV/DBS · Connect the TV's or DBS tuner's video output jack (VIDEO OUTPUT) to the VIDEO (yellow) V.AUX IN jack using a 75 /ohms video coaxial pin plug cord. · Connect the TV's or DBS tuner's audio output jacks (AUDIO OUTPUT) to the AUDIO V.AUX IN jacks using pin plug cords. LD player (VDP) or DVD player L VIDEO OUT R L MONITOR OUT · Connect the TV's video input jack (VIDEO INPUT) to the VIDEO MONITOR OUT jack using a 75 /ohms video coaxial pin plug cord. Monitor TV VIDEO IN AUDIO OUT VIDEO OUT AUDIO R OUT L VIDEO OUT R L VIDEO IN Connecting a video disc player VDP or a DVD player · Connect the video disc player's (DVD player's) video output jack (VIDEO OUTPUT) to the VIDEO (yellow) DVD/VDP IN jack using a 75 /ohms video coaxial pin plug cord. · Connect the video disc player's (DVD player's) analog audio output jacks (ANALOG AUDIO OUTPUT) to the AUDIO DVD/VDP IN jacks using pin plug cords. AUDIO OUT SIGNAL GND LOOP ANT. AM R L VIDEO OUT PHONO IN CD DVD / VDP VIDEO OUT MONITOR PRE OUT DVD / VDP MAIN IN V.AUX IN SPEAKER SYSTEMS AC OUTLETS VCR MULTI SOURCE OUT VCR IN ROOM TO ROOM (REMOTE CONTROL) AUDIO R R L L R FM COAX. 75 V.AUX VCR TAPE L R R B L R A L ANTENNA L OUT MULTI SOURCE R + + SWITCHED TOTAL 120W(1A.) MAX. 120V 60Hz VCR TAPE L AUDIO OUT AUDIO IN IMPEDANCE A or B : 4 16 A + B : 8 16 - R L AUDIO R L OUT VIDEO OUT VIDEO IN Video deck OUT IN VIDEO VIDEO IN Sub room Monitor TV R L R L R OUT L R IN L AUDIO Connecting a video decks Video input/output connections: · Connect the video deck's video output jack (VIDEO OUT) to the VIDEO (yellow) VCR IN jack, and the video deck's video input jack (VIDEO IN) to the VIDEO (yellow) VCR OUT jack using 75 /ohms video coaxial pin plug cords. Connecting the audio output jacks · Connect the video deck audio output jacks (AUDIO OUT) to the AUDIO VCR IN jacks, and the video deck's audio input jacks (AUDIO IN) to the AUDIO VCR OUT jacks using pin plug cords. 7 ENGLISH Connecting the antenna terminals AM LOOP ANTENNA (An Accessory) DIRECTION OF BROADCASTING STATION FM ANTENNA 75 /ohms COAXIAL CABLE SIGNAL GND LOOP ANT. AM PHONO R L CD IN VIDEO OUT MONITOR DVD / VDP V.AUX IN VCR MULTI SOURCE OUT VCR IN ROOM TO ROOM (REMOTE CONTROL) DVD / VDP V.AUX FM COAX. 75 VCR TAPE ANTENNA OUT MULTI SOURCE VCR TAPE R L AUDIO R L OUT AM OUTDOOR ANTENNA GROUND FM INDOOR ANTENNA (An Accessory) AM loop antenna assembly Connect to the AM antenna terminals. Connection of AM antennas 1. Loosen by turning counterclockwise. 2. Insert the cord. 3. Tighten by turning clockwise. 1 2 3 4 Remove the vinyl tie and take out the connection line. Bend in the reverse direction. Note to CATV system installer: This reminder is provided to call the CATV system installer's attention to Article 820-40 of the NEC which provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical. a. With the antenna on top any stable surface Mount b. With the antenna attach to a wall. Instllation hole Mount on wall, etc. NOTES: · Do not connect two FM antennas simultaneously. · Even if an external AM antenna is used, do not disconnect AM loop antenna. · Make sure AM loop antenna lead terminals do not touch metal parts of the panel. 8 ENGLISH Speaker system connections · Connect the speaker terminals with the speakers making sure that like polarities are matched (< with <, > with >). Mismatching of polarities will result in weak central sound, unclear orientation of the various instruments, and the sense of direction of the stereo being impaired. · When making connections, take care that none of the individual conductors of the speaker cord come in contact with adjacent terminals, with other speaker cord conductors, or with the rear panel. NOTE: NEVER touch the speaker terminals when the power is on. Doing so could result in electric shocks. Speaker Impedance · When speaker systems A and B are use separately, speakers with an impedance of 4 to 16 /ohms can be connected for use as speakers. · Be careful when using two pairs of speakers (A + B) at the same time, since use of speakers with an impedance of 8 to 16 /ohms. · The protector circuit may be activated if the set is played for long periods of time at high volumes when speakers with an impedance lower than the specified impedance are connected. Connecting the speaker terminals Connecting banana plugs 1. Loosen by turning counterclockwise. 2. Insert the cord. 3. Tighten by turning clockwise. banana plug Turn clockwise to tighten, then insert the banana plug. SPEAKER SYSTEMS System B · Precautions when connecting speakers If a speaker is placed near a TV or video monitor, the colors on the screen may be disturbed by the speaker's magnetism. If this should happen, move the speaker away to a position where it does not have this effect. SPEAKER SYSTEMS System A (L) (R) (L) (R) PHONO SIGNAL GND LOOP ANT. AM R L CD IN VIDEO OUT MONITOR PRE OUT DVD / VDP MAIN IN V.AUX IN SPEAKER SYSTEMS AC OUTLETS VCR MULTI SOURCE OUT VCR IN ROOM TO ROOM (REMOTE CONTROL) AUDIO R L DVD / VDP V.AUX FM COAX. 75 VCR TAPE ANTENNA OUT MULTI SOURCE VCR TAPE R B L R A L + + SWITCHED TOTAL 120W(1A.) MAX. 120V 60Hz IMPEDANCE A or B : 4 16 A + B : 8 16 - R L AUDIO R L 9 ENGLISH Protector circuit · This unit is equipped with a high-speed protection circuit. This circuit protects the internal circuitry from damage due to large currents flowing if the speaker jacks are not completely connected or if an output is generated by a short circuit. In such a case, the protection circuit will operate to cut off the output to the speakers. Should this happen, turn the power off and check the speaker connections. Then turn the power on again. After muting for several seconds, the receiver should be operating normally. If the protection circuit is activated again even though there are no problems with the wiring or the ventilation around the unit, switch off the power and contact a DENON service center. Note on speaker impedance · The protector circuit may be activated if the set is played for long periods of time at high volumes when speakers with an impedance lower than the specified impedance (for example speakers with an impedance of lower than 4 /ohms) are connected. If the protector circuit is activated, the speaker output is cut off. Turn off the set's power, wait for the set to cool down, improve the ventilation around the set, then turn the power back on. 6 PART NAMES AND FUNCTIONS Front Panel · For details on the functions of these parts, refer to the pages given in parentheses ( ). !7 B CD PHONO !6 !5 !4 DRA-685 !3 !2 VOLUME !1 PRECISION AUDIO COMPONENT / AM-FM STEREO RECEIVER REMOTE SENSOR DVD / VDP TUNER AUTO CH TONE SP-A TUNER V. AUX VCR STANDBY TAPE MONITOR TUNING DOWN UP BAND MODE MEMORY SHIFT 1 2 3 4 5 6