Sony TC-K620 User's Manual
Contents
1. POWER switch Ls Cassette holder e COUNTER buttons RESET button MEMORY button i gt LINEAR COUNTER 5 MEMORY indicator 6 PEAK LEVEL METER 7 TAPE TYPE indicator 8 Remote sensor You can remotely control this cassette deck with A remote commander that has an mark and comes with a Sony amplifier or receiver and which can be used to control a cassette deck An optional Sony remote commander that has an mark 9 MONITOR button 10 DISPLAY MODE button 1 k MPX FILTER switch 12 REC LEVEL recording level control 13 DOLBY NR switch 14 BALANCE control 15 BIAS bias adjust control 16 LEVEL headphones level control 17 HEADPHONES jack stereo phone jack 18 Tape operation buttons lt 4 rewind button bP fast forward button stop button gt play button AMS 41 PAUSE button O REC MUTE record muting button REC record button SOPENICLOSE button 20 TIMER switch AMS is an abbreviation for Automatic Music Sensor Playing Back Follow the procedure below to play back a cassette POWER gt ON 1 Turn on the amplifier and select the tape function 2 Insert the cassette with the side to be played facing outward p 2 3 Select the Dolby NR system DOLBY NA2. 4 Start playback To stop playback Press To stop playback momentarily Press 11 To restart playback press If or gt To advance the tape Press mE To rewind the tape Press qa How to use the DOLBY NR switch Set the DOLBY NR switch to the same position B C or OFF that was used when the cassette was recorded Use the DISPLAY MODE button to select the display mode You may choose among three display modes by pressing the DISPLAY MODE button 1 all indications are displayed 2 only the linear counter is displayed or 3 no display The TIMER switch must be set to OFF Otherwise recording or playback will start automatically when the power is turned on What is the Dolby NR system The Dolby NR noise reduction system reduces tape hiss noise in low level high frequency signals by boosting the signals during recording and lowering them during playback Is it necessary to set the tape type being used No The deck has an automatic tape type detection system Of the four major types of tapes your unit can use Type normal Type Il CrO and Type IV metal The tape detection system automatically adjusts the equalization and bias current to the optimum level for the type of cassette detected To change to recording mode during piayback Keeping gt pressed press The unit immediately switches from playback to recording without stopping the tape This is useful when
3. AUTO PLAY A E TEE 8 Notes on Cassettes ccc ceeeesstecasseccessesssensenes 8 Locating a desired position using the counter Memory play The Accuracy of the digital linear counter Recording Recording 9 Adjusting the Recording Level sa 10 Making an optimum recording according to the tape type Bias AdjUStMent cceeseseceseseeeeees 10 Monitoring the recorded sound What is the Dolby HX PRO system Inserting a blank space during recording Record MULING vccicsins iondsrsccnncatimnie cas 11 Using with a Timer Timer activated playback and recording ccsceeerees 12 Maintenance 12 Specifications Troubleshooting guide e Three head system separate recording playback and erase heads which allows you to instantly check the recorded sound while recording is in progress e Bias control to achieve the optimum bias current setting for any tape e The Dolby HX PRO system which improves the linearity of the tape s high range response during recording e Easy to read digital linear counter which shows the elapsed recording or playing time The AMS function which provides easy access to a desired selection Dolby noise reduction and HX Pro headroom extension manufactured under license from Dolby Laboratories Licensing Corporation HX Pro originated by Bang amp Olufsen DOLBY the double D symbol OO and HX PRO are trademarks of Dol
4. checks will help you correct the most common problems encountered with your tape deck Should any problems persist after you have made these checks consult your nearest Sony dealer Before proceeding with these trouble checks verify that e The power cord is firmly connected Amplifier connections are firmly made e Heads capstans and pinch rollers are clean e The amplifier controls and switches are set correctly Function buttons and tape transport problems Symptom Cause Remedy The function buttons do not activate Cassette holder is not fully closed Close the holder completely Cassette is not properly inserted Insert cassette correctly The button pressed immediately after Wait until the 8 indicator stops the power was turned on blinking Playback or recording begins when the The TIMER switch is not set to OFF Set the TIMER switch to OFF power is turned on button does not activate No cassette in the holder Insert a cassette REC indicator does not light up Tab has been removed from the Cover the hole with plastic tape page cassette 8 Automatic shut off mechanism Tape is slack Take up the tape slack ane before the tape comes to Its Cassette shell is deformed Use another cassette The Memory Play function is activated Press the MEMORY button to deactivate the function Excessively loud tape transport noise This noise is caused by the cassette
5. possible without exceeding the recommended range for the tape type being used Recommended maximum PEAK LEVEL METER reading Saturation level of Type normal and Type Il CrO tapes eB 0 30 20 10 4 o 2 4 6 8 ES ee ee D S E a a SS SS ae aO ovu od neas Saturation level of Type IV metal tapes Tips on recording level adjustment e If the recording level setting is too high the recording will be distorted if it is too low the tape will produce a hissing sound Therefore the recording level should be set as high as possible without causing distortion o If the program source to be recorded has many high frequency signals set the level to a relatively low position Making an Optimum Recording According to the Tape Type Bias Adjustment To obtain the optimum frequency response use the BIAS control to adjust the bias current according to the tape type being used Reducing the bias boosts high frequencies but increases distortion Increasing the bias decreases distortion but suppresses high frequencies Balance the bias according to your listening preferences Bias reduced Bias increased high high frequencies frequencies a Bias reduced boosted suppressed D E BIAS 3s 33 Bias increased Frequency in Hz In the case of Type IV cassette tapes the frequency change for any given bias setting will be minimal 10 Monitoring the Recorded Sound As
6. S ONY 3 751 741 21 1 Stereo Cassette Deck Operating Instructions BILE LOFTY TC K620 Do not rem ve 1990 by Sony Corporation To prevent fire or shock hazard do not expose the unit to rain or moisture CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 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 This symbol 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 This symbol is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance The graphical symbols are on the rear enclosure Owner s Record The model and serial numbers are located at the rear Record the serial number in the space provided below Refer to these numbers whenever you call upon your Sony dealer regarding this product Model No TC K620 Serial No INFORMATION This equipment generates and uses radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio and television reception it has been type tested and found to comply with the limits for a Class B computing device i
7. and rewind time Approx 90 sec with C 60 cassette Frequency response DOLBY NR off Type IV cassette Sony METAL ES 20 20 000 Hz 3 dB 20 16 000 Hz OVU recording Type Il cassette Sony UX S 20 18 000 Hz 3 dB Type cassette Sony HF S 20 17 000 Hz 3 dB Signal to noise ratio NAB at peak level Dolby NR switch opp B TYPE C TYPE Cassette ON ON Type IV Sony METAL ES 60 dB 67dB 73 dB Type Il Sony UX S 59dB 66dB 72dB Type Sony HF S 57 dB 64 dB 70 dB Total harmonic distortion Inputs Line inputs phono jacks Outputs 1 0 with Sony METAL ES cassette Sensitivity 77 5 mV 20 dB Input impedance 50k ohms Line outputs phono jacks Rated output level 0 44 V 5 dB ata load impedance 47k ohms Load impedance Over 10k ohms Headphones Output level 0 2 5 mW at a load stereo phone jack impedance of 32 ohms General Power requirements Power consumption Dimensions Weight Supplied accessory Optional accessory 120 V AC 60 Hz 17 W Approx 430 x 123 x 285 mm w h d 17 x 4 x 111 inches including projecting parts and controls Approx 4 9 kg 10 Ibs 13 oz Audio connecting cord 2 Wireless remote control unit RM J701 Design and specifications subject to change without notice 13 Troubleshooting Guide The following trouble
8. ation with adequate air circulation to prevent material They will come in handy when transporting overheating of the unit the unit or shipping it for servicing Do not place the unit near heat sources such as radiators or air ducts in places subject to direct sunlight excessive dust mechanical vibration or shock in an inclined position on a rug or other soft surfaces that would block the ventilation holes on the bottom of the unit Connections Notes on Connections e Turn off the power to all equipment to be connected before making any connection e Note that the red plug of the supplied connecting cord is for right channei R connection and the white plug for left channel L connection e The connecting cords should be fully inserted into the jacks A loose connection may cause hum pickup Another tape deck LINE IN one I From another tape deck To an AC outlet TAPE INPUT Amplifier To a wall outlet For recording For playback TC K620 T ther t deck li o another tape dei TC K620 ab To an AC outlet LINE OUT lt gt Signal flow LINE IN sap To an AC outlet LINE IN LINE OUT lt Signal flow Identification of Front Panel Parts For details refer to the page number indicated in
9. by Laboratories Licensing Corporation Precautions On safety Operate the unit only on 120 V AC 60Hz Should anything fall into the cabinet unplug the unit and have it checked by qualified personnel before operating it any further Unplug the unit from the wall outlet if it will not be used for a long time To disconnect the cord pull it out by grasping the plug Never pull the cord itself On operation e When the unit is not used turn the power off to conserve energy and to extend the useful life of your unit e Because of a safety mechanism the function buttons will not operate if the cassette holder is not completely closed if there is no cassette in the cassette holder or if the cassette has been incorrectly inserted into the cassette holder On head cleaning The head and tape path should be cleaned after every 10 hours of operation Dirty heads and a dirty tape path may cause loss of high frequency response loss of sound volume sound drop out Note on cassettes longer than 90 minutes The use of cassettes longer than 90 minutes is not recommended except for long continuous playback For detailed safety precautions see the leaflet IMPORTANT SAFEGUARDS If you have any questions or problems concerning your unit please contact your nearest Sony dealer GELE Notes on installation e Piace the unit with the front panel facing you in a e Do not throw away the carton and the packing loc
10. decrease in volume To start operations while the cassette holder is open Operations may be started while the cassette holder is open For example when f amp is pressed while the cassette holder is open the cassette holder will close and playback will start Similarly pressing lt lt BP or II while the cassette holder is open wiil close the cassette holder and start the respective operation Playing Back Automatically Locating a Desired Position After Rewinding auto Play The Auto Play function automatically starts playing back a cassette after rewinding it to the beginning if MEMORY is displayed press the MEMORY button to turn it off While holding down gt press lt 4 muse ecm After the tape is completely o rewound the unit will automatically start playback Notes on Cassettes To protect a recording on side A or B Break out the respective tab side A To recover a cassette for recording Cover the respective slot with tape Tab for side A Tab for side B When using Type Il CrO or Type IV metal cassettes Be careful not to cover the detector slots which are necessary for automatic tape type detection Type II CrO Type IV metal Detector slots Detector slots Cassette care Avoid touching the tape surface of a cassette to prevent contamination of the heads by dirt dust or oil on the skin Keep cassettes awa
11. during fast winding and does not signify a mechanical problem The cassette holder will not close The power has been turned off while Turn the power on The cassette the cassette holder is open holder will close automatically 14 Recording and playback probiems Symptom Cause Remedy Recording or playback cannot be made or there is a decrease in sound level Heads are either dirty or magnetized Clean or demagnetize the heads Improper connection Improper setting of the amplifier controls Make connections properly page 4 Set the amplifier controls to the appropriate positions Excessive wow flutter or dropout Head capstan or pinch roller is dirty Clean in accordance with instructions shown on page 12 Incomplete erasure Erase head is dirty Clean the erase head Increased noise or poor reproduction in high frequencies Head is magnetized Demagnetize the head Unbalanced tone in high frequencies Improper setting of the DOLBY NR switch During playing back set the switch to the same position used in recording The unit is placed near a television set Move the unit away from the television set The desired selection cannot be located even though you activate the AMS There is noise in the space between selections The space is less than 4 seconds long Rerecord the tape if you can and insert a blank space of four
12. e counter to 0 00 2 Press bm to fast forward the tape to the end The number 4 Play the program source to be recorded on the counter shows the approximate recording time To check the approximate remaining recording time on the tape 1 Press the RESET button to reset the counter to 0 00 2 Advance the tape to its end using PR REC LEVEL BALANCE The number on the counter shows the approximate time gi remaining on the tape ry Y N pi Using the MPX filter to record FM broadcasts When recording FM broadcasts with the DOLBY NR system set the MPX FILTER switch to ON the FILTER indicator will 6 To start recording be displayed This turns on the MPX filter which eliminates i remnants of the 19 kHz stereo carrier and 38 kHz subcarrier TBE ee gt signals which may impair the operation of the DOLBY NR system Be sure that Dolby NR switch is turned on since the MPX filter will not function otherwise Note that the MPX FILTER switch must be turned on only when the tuner is not equipped with its own MPX filter or the equipped filter still results in sound degradation during recording with the Dolby NR system 5 Adjust the recording level and balance see page 10 To stop recording press Adjusting the Recording Level The optimum recording level which differs according to the tape type is indicated on the Peak Level Meter for each tape type Adjust the REC LEVEL control as high as
13. editing previously recorded material For headphone listening Connect the headphone piug to the PHONES jack The listening level can be controlled with the LEVEL control Is it necessary to set the MONITOR button for playback No The TAPE mode is automatically selected and TAPE is displayed Note The Doiby HX PRO System is effective only during recording not during playback Locating a Selection automatic Music Sensor AMS The AMS function detects the blank space between selections allowing you to quickly locate the beginning of desired selections During playback press B or lt q referring to the following table Desired selection Next selection Selection being played gt gt lt a The PLAY indicator blinks while the AMS searches for the beginning of the selection After locating the beginning of the selection playback wili stat automatically To ensure proper operation of the AMS There must be a blank of four seconds or longer between selections Use the record muting function to insert a blank space when recording The AMS may skip a selection If there is noise in the space between selections If the space is less than four seconds long If the lt q or Be is pressed immediately before the following selection The AMS will treat the following as bianks a long pause in the music a passage of low frequencies or very low volume a gradual increase or
14. er widely according to the bias high frequency current In conventional systems the bias current is susceptible to variations in certain recording signals see diagram below which can cause fluctuations in frequency response distortion or other unwanted characteristics High 4 Fluctuation Output Frequency gt High Inserting a Blank Space during Recording Record Muting The Record Muting function allows you to insert a four second blank space on the tape to enable you to locate the selection later with the AMS function see page 7 You can also use the button to replace unwanted input with a blank space PAUSE REG MUTE L QO 2 1 1 While recording press and release it immediately The indicaior will start to blink During this time no incoming signals are recorded on the tape After four seconds the Ii indicator lights up and the unit enters the recording pause mode 2 Resume recording PAUSE With the Dolby HX PRO system the effective bias amount added to the bias current is controlled in millisecond units to greatly reduced distortion improving linearity in high range response and ensuring high intensity recording with minimal distortion and noise To create a blank longer than four seconds Press for the desired length of time The indicator will blink with greater rapidity after four seconds When you release the button the unit g
15. ity recorded sound cleaning before every recording is recommended Recording head Erase Playback head head Pinch roller The cassette holder does not open unless the power is on 1 Keeping the power on turn the volume control on the amplifier to minimum 2 Press amp to open the cassette holder 3 Wipe the heads the pinch rollers and the capstans with a cotton swab slightly moistened with alcohol or commercially available cleaning fluid for tape decks Specifications Demagnetizing the Heads After every 20 or 30 hours of use or when you notice hiss and or loss of high frequencies the residual magnetism built up on the heads should be removed 1 Keeping the power on turn the volume control on the amplifier to minimum 2 Demagnetize the heads with any commercially available demagnetizer Refer to the instruction manual of the demagnetizer for detailed instructions Cleaning the Cabinet Clean the cabinet panel and controls with a soft cloth slightly moistened with a mild detergent solution Important Do not use any type of abrasive pad scouring powder or solvents such as alcohol or benzine Recording system Bias Heads Motors Wow and flutter 4 track 2 channet stereo AC bias Erase head x 1 S amp F head Recording head x 1 Permalloy head Playback head x 1 Permalloy head Capstan motor x 1 DC servo motor Reel motor x 1 OC motor 0 05 WRMS NAB Fast forward
16. more than the actual tape running time than the actua tape running time al Do not turn off the power while using the counter Turning the power off and then on again resets the counter to 0 00 Recording Follow the procedure below to record a program source on a cassette POWER gt ON TIMER gt OFF 1 Insert the cassette with the side to be recorded facing outward If playback starts instead of recording The cassette tab has been removed To record on this cassette cover the slot with tape See page 8 OPEN CLOSE The TIMER switch must be set to OFF Otherwise recording or playback will start automatically in a few seconds when the power is turned on 2 Select the Dolby NR system one NR Is it necessary to set the MONITOR button for recording s No The source mode is automatically selected and SOURCE is displayed If you wish to monitor the recorded sound press the MONITOR button to select the TAPE mode To start recording while the cassette holder is open if you press the REC button while the cassette holder is 3 gt a ros open the holder will close automatically and the unit will switch to recording pause mode This function allows you to M start recording at a moment s notice How to check the total recording time of a tape The unit will enter recording pause mode 1 Press the RESET button at the beginning of a tape to reset th
17. n accordance with the specifications in Subpart J of Part 15 of FCC Rules which are designed to provide reasonable protection against such interference in a residential installation However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient the receiving antenna Relocate the equipment with respect to the receiver Move the equipment away from the receiver Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington DC 20402 Stock No 004 000 00345 4 Table of Contents Features Getting started Features Precautions 3 Installation Connections Identification of front pane parts Playback Playing back Locating a selection Automatic Music SensorAMS eeren 7 Playing back automatically after rewinding
18. oes into the recording pause mode Press il to resume recording 11 Timer Activated Playback and Maintenance Recording By connecting an optional timer recording or playback can be performed automatically at a preset time To a wall outlet 1 Insert a cassette and prepare the unit for playback or recording For playback Follow steps 1 through 3 on page 6 Close the holder completely For recording Follow steps 1 through 5 on page 9 2 Set the timer to the desired time Power to the unit will be cut off 3 Set the unit s TIMER switch to PLAY or REC Playback or recording will start at the preset time When the timer activated operation is completed Set the TIMER switch on the unit to OFF If the TIMER switch is left at REC the unit will automatically enter the recording mode the next time the power is turned on and the previously recorded material may be erased Keep the POWER switch on the unit ON When the timer is set the power to the unit will be cut off However the POWER switch must be on to start timer activated operation 12 Cleaning the Heads and Tape Path Clean all surfaces over which the tape travels after every ten hours of operation to guard against low quality sound a decrease in sound level excessive wow flutter or dropout incomplete erasure impairment of recording function To obtain high qual
19. seconds using the button The gt p or lt q bution was pressed immediately before or after the beginning of the following selection Playback may begin in the middle of the selection when the AMS is activated The selection contains one of the following a long pause in the music a passage of low frequencies or very low volume a gradual increase or decrease in volume While the tape is playing press the bP or lt lt button again Symptom Hum noise The unit is stacked on or under the amplifier Separate the unit Noise is recorded Recording was made near equipment such as a television set or a color monitor and interference has affected the recording on the tape and the Dolby NR system Move the unit away from the television set or color monitor
20. this unit has three separate heads for recording playback and erasure you can check the quality of a recorded sound by comparing it with the input signal before recording See the MONITOR indication and signal flow While recording use the MONITOR button to check that there is no distortion due to excessive level settings or sound degradation due to head contamination How to use the MONITOR button To listen to the input signal before recording press the MONITOR button to select SOURCE To listen to the recorded sound from the tape press the MONITOR button to select TAPE MONITOR indication and signal flow MONITOR indication Band REC LEVEL Recording head URCE Owo MONITO LINE OUT TAPE Playback head HEADPHONES The signal to be recorded can be monitored LINE IN Signal flow LINE IN SOURCE Recording head LINE OUT HEADPHONES TAPI Playback head The recorded signal can be monitored at is the Dolby HX PRO System The Dolby HX PRO system provides improved linearity in high range frequency response during recording Tapes recorded with this system retain the same high quality even when played back on other tape decks High i j Distortion l output f 1 10 kHz Bias current High Established bias current As shown above characteristics such as output level and distortion diff
21. y from equipment with magnets such as speakers and amplifiers as erasure or distortion on the recorded tape could occur e Do not expose cassettes to direct sunlight extremely cold temperatures or moisture Using the Counter Memory Play The Memory Play function allows you to use the counter to record a desired position on a cassette for fast relocation and automatic playback later At the desired position L Memory 1 Ee Ta Po 009 008 The desired position is memorized ay To return to the desired position aca While holding down lt gt press gt i The tape is rewound to 0 00 and playback starts If you press only the lt button the tape will be rewound and the unit will stop when the counter reaches 0 00 Memory Stop The Accuracy of the Digital Linear Counter This counter is not a digital clock and thus the indicated number will not exactly equal the actual elapsed time The difference between the number and the elapsed time will vary depending on the type of tape being used This counter has been designed using Sony cassette tapes as a standard You may want to check the accuracy of the counter when using cassette tapes other than Sony s or tapes of a special length C80 thin hub C54 thin hub C60 C90 thin hub C46 thin hub C46 thick hub Minute 1 0 1 2 3 The counter indication is less The counter indication is
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