User manual NAKAMICHI CA-5II

Nakamichi Ch hu/Ch- ......u Control Amplifier Owner's Manual Nak mlchl is prod ucing Hi-R equi pment for 52 countries of the world. Man y countries have safety reg ulations, to which Nakamichi has to comply during production. The add itional mentioning of "A" on your model means that Ihis product has been produced according to the requirements In the Uni ted States of the Underwri tes Laboratories (UL), as well as other appl icable state and Federal safety standards. Withi n the United States, Nakamlchi has authorized Its local di stributors to offer warra nties only on products which have been produced for th e United States market in accordance with the foregoin g standards. Notice to Purchasers of the Model CA-sn : Reference In th e illustrations and the text Is made to "CA-5 An," but operation and functions are completely Identical to your model. ---CAUTION-- TO 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 fl as h with arrowhead symbol, Withi n an equilateral tri angle, is in tended to alert the user of the presence of un in sufatea "d angerou s voltage" wit hin the produ ct's enclosu re , th at m y be of suffic ient magnitude to con stitut e a risk of elect ric shock to persons. The excla mation poin t with in an equ il atera l tri angle IS Int ended to alert the user 01 the presen ce of Important operating and ma int nance (serv ic ing) Instruct ions, in t he literat ure accompan ying the appli ance. A A. RISK OF ELECTRI[ SHOCK. OOHOTDPEH I Congratulations! You have chosen a truly outstanding product. The Nakamlchi CA-5AlI is a control amplifier deSigned to provide superior performance and utterly pure Signal transmission , It achieves this aim without relying on a large amount of negative feedback, The Multi-Regulated Power Supply and Isolated-Ground principle effectively eliminate crosstalk and interference arising in the power supply. Only strictly selected, high quality parts are used throughout, such as metal-film resistors and circuit boards with oxygen-free copper traces, Circui t design is Simple and effective. The ultimate result is music reproduction without the slightest trace of coloralion . In order 10 take full advantage of this unit's superior performance, please read this manual in its entirety and retain it for future reference, Thank you , Nakamlchi Corporation. Please record the Model Number and Serial Number in the space provided below and retain these numbers. Model Number and Serial Number are located on the rear panel of the unit. Model Number : CA- 5~AIl ~::.:..!..5n ~~~ e;./CA -:::;~_ _ _ __ Serial Number: _ _ _ _ _ _ _ __ _ _ Safety Instructions The following safety instructions have been Included in compliance with safety standard regulations, Please read them carefu ll y, 1. Read Instructions - Ali the safety and operating instructions should be read before the appliance is operated. 2. Retain instructions - The safety and operating instructions should be retained for future reference, 3. Heed Warnings - Adhere to all warn ings on the appliance and in the operating instructions. 4. Follow Instructions -All operating and use instructions should be followed, 5. Water and Moisture - The appliance should not be used near water -for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wei basement, or near a swimming pool, etc. 6 . Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer. 7. Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by Ihe manufacturer, S Venti lation - The appliance should be situated so that its location or positi on does not interfere with Its proper ven ti lation. For example, the appliance should not be situated on a bed, sofa, rug or similar surface that may block the ventilation openings; or placed in a built -In installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 9, Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) which produce heat. 1O,Power Sources - The appliance should be connected to a power supply only of the type described in the operating Instructions or as marked on the appliance. 11.Grounding or Polarization-precautions should be taken so that the grounding or polarization means of an appliance is not defeated. 12,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, conveni ence receptacles, and the point where they exit from the appliance. 13.Cleaning- The appliance should be cleaned only as recommended by the manufacturer. 14. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. 15.0bject and Li quid Entry - Care should be taken so that objects do not fall and liquids are not spil led into the enclosure through openings. 16.0amage Requ iring Service - The appliance should be serviced by qualifi ed service personnel when : A The power-suppl y cord or the plug has been damaged; or, B. Objects have fallen, or liquid has been spilled into the appliance; or, C. The appliance has been exposed to rain; or, 0 , The appliance does not appear to operate normally or exhibits a marked change in performance; or, E. The appliance has been dropped, or th e enclosure damaged. 17. Servicing - The user should not attempt to service the appliance beyond that described In the operating instruction . All other serviCing should be referred to qualified service personnel. WARNING TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. This equipment generates and uses rad io frequency energy and If not in stall ed and used properly, that is, in st rict accordance with the man ufact urer's instruct ions, may cause interference to radiO and television reception . It has been type tested and found to comply wi th the limits for a Class B computing device in accordance wit h the specifi cations in Subpart J of Part 15 of FCC Ru les , whi ch are deSign d to provi de reasonable prot ecti on against such interference in a residential installation. However, there is no guarantee tha t interference wi ll not occur in a particu lar install ation. If this equipment does cause interferen ce to radi o or television recept ion, whi ch can be determined by turning the equ ipment off and on, the user is encouraged to try to correct the interference by one or more of the fol lowing measures : - reorien t the receivi ng antenna - relocate this equipment wi th respect to the rece iver move th is equipment awa y from th e recei ver plug thi s equipment into a different ou ti et so that equipment an d receiver are on different branch cirCUits . If necessary, Ihe user shoul d cons ult the dealer or an experienced radloltelevision technician for additional suggestions. The user may fi nd the following booklet prepared by the Federal Commu nications Commission helpful : "How to Identify and Resolve Radio-TV Interference Problems". This booklet is avai lable from the U.S. Government Pri ntin g Office, Wash ington, DC 20402, Stock No. 004-000-00345-4 Caring for the Exterior Panels Caring for the exterior panels of th e unit should be limited to wipi ng with a soft. dry cloth . AVOid using solvents or alcohol-based cleaners. 2 Controls and Features Power Indicator Power Switch o Output Level (Volume) Control r:..J\"SAIl ~u.1t· u. A," I't..... ;:::::::::::::::::::::::::::::::::::::j:::::::::::::::::::::::+:::::::::::::::+=::::::::::::~:::::::;;p;;;;_~"::=::'...J Tuner Input Jacks Auxiliary Input Jacks Phono Input Jacks Tape Deck 1 Playback (Input) Jacks Tape Deck 2 Playback (Input) Jacks Une Output Jacks 2 UtIL .. 10<0 .. . . ~ .... I CD Input Jacks Ground Terminal -{ Una Output Jacks 1 Tape Deck 2 Recording (Output) Jacks AC Power Connector \) . .~ C Tape Deck 1 Recording (Output) Jacks C) Tape Monitor Switch Tape 1 For playback of a tape deck connected to the Tape 1 jacks. For playback of a tape deck Tape 2 connected to the Tape 2 jacks. Source To listen to the program source chosen with the Input selector. Copy' ... 2: For lape dubbing from tape deck 1 to tape deck 2. Copy 1 : For tape dubbing from tape deck 2 to tape deck 1. Tone Controls Serve to adjust the tonal balance. By turning a knob clockw ise, the respective range is emphasIzed, and by turning it one word the frequenc ies are attenuated. To actil/ate the tone control circuits. set the Tone switch to "On ." Bass : From the center clickstop position . adjustment is possible within the range of ± 10 dB (at 20 Hz) Treble: From the center clickstop position, adjustment is possible wi thin the range of ±10 dB (at 20 kHz) Tone Switch Setting this switch to "On" activates the tone control circuits. When the switch is set to "Off," the circuits are bypassed and the signal Is routed directly 10 the power amplifier section, to further enhance sonic purity. o o Cartridge load/Gain Selector When a moving-magnet cartridge is used, th is switch selects the termination capacitance. With moving-coil cartridges, th e switch controls the gain of the head amplifier. o Terminal for Remote Power On/Off Switching Connect the opti onal System Power Control strip (SPC- 1) to this termina l 2" 8 Input Selector Serves to select one of the program sources connected to the CA-SAll : tuner, turntable, CD player, etc. o o o Balance Control Serves to adjust left/right speaker balance. (\) Cartridge Selector Set this switch to the correct position for the type of phono cartridge in use. Voltage Selector AC voltage is factory set for the country In which you purchased your unit. The voltage selector permits re-seltlng of mains voltage in case the unit is to be used in a different country. Note: Safety regulations in certain countries prohibit Inclusion of a voltage selector. This feature, therefore, may be absent trom your unit. 3 Connections Turntable Tuner Tape Deck 2 To L, R Inputs ~ To L, R Outputs _ - - - - _ Power Ampli fier 2 ~ To L, R Inputs To l_, R Outputs To L, R Inputs To L, R Outputs To AC W II Outlet or Opti onal System Power Control Strip (SPC-1) CD Player Tape Deck 1 Power Ampl ifier 1 System Power Control st rip (SPC-1) Establish connections to other system components as shown in the above example. Wh ile making connections, be sure to set the power switches of all components to Off. · For easy identification, the upper row of all input and output jacks of this unit serves th e left channel and the lower row the right chan nel. · Never use a moving -magnet cartridge with the selector set to the "Moving Coil" position, as this will result in severe distortion and possible damage to this unit and to th e loudspeakers. Turntable Connections Connect the ground lead from the turnta ble to the Ground (GND) termi nal of th is un it. · Cartridge Selector The Cartridge selector switch on the rear panel of this unit must be set to the correct position, depending on the type of phono pickup used. Moving Magnet: For moving-magnet (MM) type cartri dges (including the so-called MI, 1M and VM types), as well as for high-output moving-coil cartridges with a rated output voltage of 1.0 mV or more. Moving Coil: For moving-coil type cartridges with a rated output voltage of less than 1.0 mV · Cartridge Loading This unit Incorporates a Cartridge Load/Gain selector to ensure optimum term ination and gain for best results with a wide range of phono cartridges. When the Cartridge selector is set to "Moving Magnet," a choice of three differen t load capac itance values is provided (100 pF, 200 pF, or 300 pF) When the Cartridge selector is set to "Movi ng Coil," the head amplifier gain can be switched in three steps (24,30, or 36 d B). When determining the capacitance setting for moving-magnet ca rtridges, the so-called floating capacitance added by the connecting cables between the cartridge and this unit's Phono Inputs must also be taken into cons ideration . As a rule of thumb, the desired capacitance can be found by subtracting the cable capaCi tance (approx. 100 pF for ordinary cables) from the recommended capaCitance loading for your cartridge (usually li sted in the spec sheet). However, as the floating capaCitance can vary considerably depending on the t ype and len gth of cable involved (i ncluding tonearm wir ing etc.), a final decision on the optimum position of the Cartridge Load/Gain selector should be made by ear. The Cartridge Load /Gain selector permi ts switching of the moving-coil preampli fier gain in three steps, to accommodate cartr idges with different rated outputs. (information regarding the output level is given in the specification sheet accompanying the cartridge.) Rated output of cartr idge 1.0 - 0.4 mV 0.5 - 0.2 mV 0.3 mV or less More than 1.0 mV Load/Gai n selector setllng 24 dB 30 dB 36dB Set Cartridge selector to the "MM" position. 4 · Th e load impedance for the moving-coli input of this unit is factory-set to 100 oh ms. This value is suitable for the vast majority of MC cartr idges. However, a few cartridge types wil l perform best with lower impedance settings. For such cases , the impedance can be changed to SO, 30, 20, 10, or 3 ohms by adding internal resistors. (The optimum load impedan ce for a cartridge is usually listed in its specification sheet.) The resistors to be used for alteri ng the impedance are supplied with the control amplifier. When wishing to make this alteration, be sure to contact your dealer. Never attempt to Install the resistors yourself, as opening the unit involves a considerable risk of electric shock. Tape Deck Connections This uni t provides two sets of recordi ng outputs and pl ayback inputs for con nection of two tape recorders. Conne t the output term inals of a tape deck to this unit's Tape Playback jacks (1 or 2), and the input term inals of a tape deck to th is unit's Tape Recording jacks (1 or 2). Power Supply Connections Confi rm that this unit's Power swi tc h is set to "Off". Then insert the supplied power cord into th e AC Power con nector on the rear panel of th is unit and plu g the oth er end into an AC wall ou tl et. After all system connections are completed, make sure th at th is uni t's Outpu t Level control is turned to mini mum. Then set th is unit's Power switch to "On" and finally tu rn on the power amplifier. Leave the Output Level control of the CA-SAII at minimum until th e switch-on muting interval of the power ampli fier is terminated. · Use of the System Power Control strip SPC-1 By connecting the opti onal System Power Control strip (SPC-1) to the termin al for Remote Power Onl Off Switching on th e rear panel of this unft, AC power to oth er system components can be controlled by the Power switch of the CA-SAIT. For details, please refer to th e instructions supplied with the SPC-1. Power Amplifier Connections This unit provides two sets of li ne outputs, so that two power amplifiers can be driven simul taneousl y, if desired. Since exactly the same signal is suppli ed at these outputs, either set can be ch osen when only one power amplifier is used. Never insert an y shorting pl ugs or th e like into the other set of li ne output Jacks. as th is ca n cause damage to th e unit. Always turn the Volume control fu ll y down before operating the Cartridge selector or the Load/Gain selector, to protect the loudspeakers from damage. Operation Before operating the unit, make sure that the Output Level control is ful ly turned to min imum. For a bri ef period (approx. 4 seconds) after power to this unit is switched on . the output of the CA- SAIT remains muted and no sound will be heard, until all internal circuits to stabilize. After all system connections are completed, make sure that this unit's Output Level control is turned to minimum. Then set this unit's Power switch to "On" and finally turn on the power amplifier. Leave the Output Level control of the CA-SAIT at minimum until the switch-on muting interval of the power amplifier is terminated. Ustening to Other Program Sources (CD Player, Tuner, etc.) Set the In put selector to "C D", "Tuner" or " Aux" as requ ired and set the Tape Monitor switch to "Source." Then operate the CD player, tuner or other component. Adj ust the volume level , balance and tonal ch aracter with the respective controls of the CA- SA1L · If the connected tape deck possesses three heads and monit orin g capability, the quality of the act ual recorded Signal can be ch ecked by setting th e Tape Mon itor switch of the CA-5All to "Tape 1" (or "Tape 2") during recordin g. Tape Dubbing Recording and Playback With a Tape Deck For playback of a tape. set the Tape Monitor switch to "Tape 1" or "Tape 2," as requ ired. For recording on a tape deck, select the desired program source with the Input selector and set the Tape Monitor switch of th e CA- 5AII to "Source." Then set the tape deck to the record mode. The signal supplied to the tape deck is completely unaHected by the volume, tone control and balance settings of the CA-SAIT . · The signal from the program source chosen by the Input selector is always present at both sets of tape recording outputs. Recording can therefore also be carried out on two tape decks simultaneously. When two tape recorders are connected, dubbing in both directions can be carried out easil y. To play back a tape on tape deck 1 and record it on tape deck 2, set th e Tape Mon itor switch to "Copy 1 ~ 2" To reverse the process, choose the "Copy 2~ 1" posi tion. In these switch positions, the output signal of the record ing deck is present at the preampl ifier output jacks 1 and 2. If the recording deck has three heads. monitoring can therefore be carried out, to ch eck the quality of the actual recorded Signal. The signal supplied to the tape input terminals of the tape recorder during dubbing is compl etely unaffected by the volume, tone control and balance settings of the CA-5AlI . Phono Playback Set the Input selector to "Phono" and the Tape Monitor switch to "Source." Then operate the turntable. After the stylus was lowered onto the record, turn up the Output Level control of this unit to obtain the desired listening volume. If required, adjust the sound with the Balance and Tone controls. · To protect the loudspeakers from possible damage, always turn the Output Level control fully to minimum before lowering or lifting the stylus. S Troubleshooting Condltlon Probable Cause Remedy No power. 1. AC cord not plugged properl y into AC Power connector of thi s unit or AC wall oullet. 2. Internal AC line fu se h s blown. 3. Faulty connections of RCA-type plugs , sh ielded cables between components, or speaker cables. 4. Input sel ector or Tape Monitor switch not set correctly. 5. Power ampli fi er at fault (protection circu its are operating, etc.) 6. Fa ult y connections of RCA-type plugs, shielded cables between components, or speaker cables. 7. Balance control turned fu lly to one side. 8. Fau lty or incomplete connections of RCA-type pl ugs. 9. Faulty or incomplete connection of ground cable. 10. Output cable from turntabl e routed clos to AC power cord . 11. Movin g-coi I cartridge wilh ra ted output of less than 1.0 mV used at "Moving Magnet" position. 12. Load impeda nce seltin g incorrect. 1. Plug in AC cord firmly. 2. Contact an auth orized service station. 3. Check connect ions. 4. Select correct positions. 5. Refer to OWrJer's Man ual of Power amplifier. No sound. Left /right channels r v rsed, no sound from one channel. 6. Check connections. 7. Adjust Bal nce control. 8. Insert plugs fi rmly. 9. Check ground connecti on. 10. Route AC power lines as far as possibl e from ou tput cables and cartridge. 11. Set Cart ridge selector to "Moving Coil." 12. Select proper load Impedance for cartridge in use. Hum noi e is heard duri ng record playback. Low vol ume levels when using moving-coil cartri dge. Specifications Input Sensit ivity /Impedance Phono MC (36 dB G in) .. .. 45 I'-V/ 100 ohms (30 dB G in) .. 85 I'-Vl100 ohms (24 dB Gain) . ........ . 165 :LV/l00 0hms Phono MM. . .2.5 mV/50 kohms Tuner/CO/AuxlTape . . ..... 150 rnV/12 .5 kohms Input Sensiti vity (New IHF) Phono MC (36 dB Gain). ......... 11 31'-V (30 dB Gain) ..... 21.3 I'-V (24 dB Ga in). .. 41 .3 I'- V Phono MM.. ' " ............... 0.63 mV Tuner/CO/AuxlTape. .37.5 mV Max imum Input Level (1 k Hz, Non - Clippin g Level , New IHF) Phono MC (36 dB Ga in). .. 4.5 mV (30 dB Gain). .8.5 mV (24 dB Gain). ... 16.5 mV Phono MM.. . ... 270 mV Ou tput Level / Impedance Pre Out . .. .. 2 VI' kohms Rec Out . j 50 mV/1 kohms Maximum O utput Level (20 - 20,000 Hz, 1 % THO, Pre Out, New IHF) .... 7V Total Harmonic Distortion (2 0 - 20,0 00 Hz) Phono MC to Rec Out, 1V (36 dB Gainl ............ ... Less th an 0.005% . .. ...... Less th an 0.004% (24 dB Gain) . Phono MM to Rec Out, 1 V .. ..... Less than 0.00 2% TunerI CO/AuxlTape to Pre Out. 2 V .. .. Less than 0.002% Frequency Response Tuner/CO/AuxlTape . . 1- 100,000 Hz + 0, - 3 dB 1- 20,000 Hz +0, -0.2 dB RI AA Devi ation Phono MC .. . .. 20 -20,000 Hz ± 0.3 dB . . 20 - 20,000 Hz ± 0.25 dB Phono MM . . Signal-Io- Noise Ratio (JH F A-WTD) Phono MC (0.5 mV Input, 0.5 V Pre Out, Input Shorted) (36 dB Gain) . Better than 81 dB . ..... . Better th an 80 dB (30 dB Gain) ... . .... Better than 78 dB (24 dB Gain) . Phono MM (5 mV Input, 0.5 V Pre Out, Input Shorted ) ................... Better than 88 dB Tuner/CO/ AuxlTape (0.5 V Input, 0.5 V Pre Out, Input Shorted) . Better th an 95 dB Stereo Separation (100 Hz/1 kHz/ 10kHz) Phono MC (0.5 mV Input, 1 V Pre Out, Inpu t Shorted) (36 dB G in) . .. 93/85/65 dB (24 dB Gain) . . .90/84 /64 dB Phono MM (5 mV Input, 1 V Pre Out, Input Sh orted ) ..... .... 10 0 /84/64 d B Tuner/CO/AuxlTape (0.5 V Input, 1 V Pre Out, Input Shortedl .. ..... 110/95f7 5 dB Tone Control Characteristics Bass.. .. ............... 20 Hz ± 10 dB Treble. .. ...... ... 20 kHz ± 10 dB Remote Power On /Off Control Output ...... . 24 V OC Powe r Source . . .. ........ .. . .. ..... 1 20, 120/220-24 0, 220 or 240 V AC ; 50/60 Hz (According to country of sale) Power C()nsumption .... . 23 W max. Dimensions . . ... 435(W) x 3 (H) x 287(0) mm 17- 1!8(W) x 2- 112(H) x 1 1-5/ 16(0) inches Approximate Weighl ........ .... . 5.1 kg, 11 Ibs. 4 oz. · Specifications and design are subject to change for further improvement without notice. Nakamichi Nakamichi Nakamichi Nakamichi Corporation, Tokyo Offico America Corporation Canada GmbH Shinjuku Daiichi Seimei Bldg., 2-7-1 Nishishinjuku, Shlnjuku-ku, Tokyo 163 Phone: (03) 342-4461 Telex : 2324721 (NAKAM J) 19701 South Vermont Ave., Torrance, CA 0502 Phone: (213) 538-8150 276 South West, Mari ne Drive, Vancouver, B.C. V5 X 2R4 Phone: (604) 324-7535 ssel dorf 1 Phone: (021 1) 359036 Stephanlsnstrasse 6,4000 DO 0004)90A o 87U905e Ptlf'"',fld 111 Jillun