background image

14

PROTECTING YOUR RECORDINGS
All cassette tapes are provided with erasure protection holes
to prevent accidental erasure of recorded contents.  There is
a small tab covering the hole on each side of the cassette,
and it should be broken off after recording the tape. Without
this tab covering the hole, it is impossible to record onto that
tape.  Thus, you can safely protect a recording for as long as
you wish without fear of accidental erasure. Should you wish
to use a cassette tape protected in this way for recording,
simply covering the hole with adhesive tape will permit
erasure and re-recording.

÷

When using Chrome (Type II/HIGH <CrO

2

>) or Metal

(Type IV/METAL) tapes, make sure you do not cover the
hole intended for the Auto Tape Selector operation.

TAKING UP SLACK IN THE TAPE
As a precaution against tape entanglement and damage,
remove any slack in the tape before inserting cassettes into
the deck. This is accomplished by inserting a pencil, pen or
similar object into one of the spools and gently winding it
until all the slack is removed.  You do not have to wind it too
tightly.
Be careful not to touch the tape part itself. It is very delicate
and touching it may damage the tape and its recorded
contents.

STORING CASSETTES
After putting a cassette tape back into its case, store it in a
location away from exposure to direct sunlight, humidity,
high temperatures, and magnetic fields (away from television
sets, speakers, etc.).  High temperatures and humidity will
damage the tape itself, while exposure to magnetic fields
may cause a loss of recorded material. Avoid touching the
tape surface with your fingers, since dirt or finger oil will
contaminate the deck’s heads.

CASSETTE TAPES

CASSETTE TAPES
There are many different types of cassette tapes available.
However, they all conform to standard specifications so any
brand may be used with the deck.

÷

Classification of Cassette Tapes by Formulation:
Cassette tapes are available in four basic types depending
on their formulation, or type of magnetic material and
manufacturing process.  These four types are commonly
known as Normal (Type I/NORM), Chrome (Type II/HIGH
<CrO

2

>), Ferrichrome (Type III/FeCr), and Metal (Type IV/

METAL), and they each require specific tape deck
adjustments for optimum performance.

* YAMAHA does not recommend the use of 120 minute

length cassettes since the extreme thinness of the tape
makes them susceptible to mechanical and recording
problems.

AUTO TAPE SELECTOR DETECTION SLOTS
The deck has a built-in Auto Tape Selector which
automatically adjusts for the proper bias, level and
equalization according to the tape formulation — all you
have to do is to load a cassette and the Auto Tape Selector
does the rest.
The Auto Tape Selector determines which type of tape is
loaded by sensing detector slots in the top of the tape shell.
Each tape formulation has its own characteristic hole
markings standardized by the tape industry.

÷

Early model Metal (Type IV/Metal) tape formulation
cassette shells do not have the slots for Auto Tape
Selector operation. As a result, early model Metal type
tapes recorded on another deck will be played back with
the deck at the Chrome (Type II/HIGH <CrO

2

>) settings.

YAMAHA does not recommend using this kind of tape.

÷

The deck does not have the required setting for
Ferrichrome (Type III/FeCr) tape, since this tape
formulation is not widely used. Should you use a
Ferrichrome tape, it will be recorded and played back at
the Normal (Type I/NORM) settings, which will result in an
unnatural high frequency emphasis. This effect may be
compensated for somewhat by adjusting the PLAY TRIM
control and/or the tone controls of your amplifier/receiver
during playback.

Detector slots

Detector slots

TYPE II

TYPE IV

Summary of Contents for K-902

Page 1: ...réo de la série Natural Sound OWNER S MANUAL MODE D EMPLOI IMPORTANT Please record the serial number of your unit in the space below Model Serial No The serial number is located on the rear of the unit Retain this Owner s Manual in a safe place for future reference ...

Page 2: ...should not attempt to service the appliance beyond those means described in the operating instructions All other servicing should be referred to qualified service personnel 17 Grounding or Polarization The precautions should be taken so that the grounding or polarization of an appliance is not defeated CAUTION The apparatus is not disconnected from the AC power source as long as it is connected to...

Page 3: ...nic Industries Association s Consumer Electronics Group want you to get the most out of your equipment by playing it at a safe level One that lets the sound come through loud and clear without annoying blaring or distortion and most importantly without affecting your sensitive hearing Since hearing damage from loud sounds is often undetectable until it is too late YAMAHA and the Electronic Industr...

Page 4: ... Playback from DECK A to DECK B Selection Search Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation DOLBY and the double D symbol are trademarks of Dolby Laboratories Licensing Corporation DUBBING 13 CASSETTE TAPES 14 MAINTENANCE 15 OPTIONAL REMOTE CONTROL TRANSMITTER 15 TROUBLESHOOTING 16 SPECIFICATIONS 17 Recording Mute Function Rec Return Operation Ea...

Page 5: ...uld be connected to the Rec Out Recording Output jacks on your amplifier receiver Connect the power cord to an AC wall outlet or to an AC outlet on the rear panel of your amplifier receiver if provided Amplifier or receiver NOTES ON THIS MANUAL In this manual the main operation buttons of the front panel are indicated based on DECK B when the operation is common to both DECKs A and B Since the loc...

Page 6: ...rse and the corresponding indicator lights on the display To stop playback Press the STOP button To remove the cassette tape press the EJECT button The cassette compartment door opens To turn off the power press the POWER button To set the counter reading to 0000 Press the RESET button Use the tape counter to aid in locating a point on a tape 0000 to 9999 To fast forward or rewind the tape When th...

Page 7: ...ape is fast forwarded to the end of the forward side playback automatically starts from the reverse side Both sides of the tape are repeatedly played back up to 8 times When the tape is fast forwarded or rewound to the beginning or the end of a side playback automatically starts from the same side or the other side respectively RELAY Cassette tapes loaded in DECKs A and B are played back sequentia...

Page 8: ...sired selection by searching for the beginning of the selection When the tape running indicator is lit To search for the next selection When the tape running indicator is lit When the tape running indicator is lit To search for the beginning of the current selection When the tape running indicator is lit To search for the selection located before the current selection Operate the following buttons...

Page 9: ...Ks A and B start playback from DECK A The playback patterns differ according to the setting of the MODE button Refer to the following When the MODE button is set to RELAY DECK A forward side reverse side DECK B forward side reverse side When the MODE button is set to DECK A forward side reverse side DECK B forward side reverse side When the MODE button is set to DECK A forward side reverse side DE...

Page 10: ...sh in the compartment door until it locks shut PLAY Recording starts 1 2 4 Preparation for recording Turn on the POWER switch Set your amplifier or receiver to cassette deck function mode Basic operation To record a program source 3 Select the tape running direction Press the DIRECTION button for DECK B Each time this button is pressed the tape running direction changes between forward and reverse...

Page 11: ...se OFF No noise reduction B For recording the sources with Dolby B NR C For recording the sources with Dolby C NR Dolby noise reduction is an extremely effective method of reducing undesirable background hiss on tapes This unit incorporates both Dolby B NR and the newer Dolby C NR system Dolby C NR is approximately twice as effective as the earlier Dolby B NR Display during recording 30 dB A R L 2...

Page 12: ...eck enters Rec pause mode after making a 4 second blank interval To resume recording press the PLAY button If a blank interval shorter than 4 seconds is desired press the PLAY button at the desired point during Rec mute mode Recording will be resumed from that point During recording During Rec mute operation the REC indicator blinks During recording When the indicator is lit When the indicator is ...

Page 13: ...bed To stop dubbing Press the STOP button If you press the STOP button on DECK B both decks stop simultaneously and the dubbing mode is cancelled If you press the STOP button on DECK A DECK A stops immediately and then DECK B stops after recording a 4 second blank section When the tape in DECK B reaches its end DECK B and DECK A stop at the same time When the tape in DECK A reaches its end DECK A ...

Page 14: ...es available However they all conform to standard specifications so any brand may be used with the deck Classification of Cassette Tapes by Formulation Cassette tapes are available in four basic types depending on their formulation or type of magnetic material and manufacturing process These four types are commonly known as Normal Type I NORM Chrome Type II HIGH CrO2 Ferrichrome Type III FeCr and ...

Page 15: ... Normal use will cause an accumulation of dirt and dust on the heads capstans and pinch rollers This can lead to poor sound quality drop outs intervals with no sound unsteady tape speed loss of high frequency response etc Thus clean the heads and all surfaces over which the tape travels with a commercially available cleaning cassette and fluid type cleaner DEMAGNETIZATION After 20 30 hours of use ...

Page 16: ...with adhesive tape Clean head Demagnetize head using head demagnetizer Change to a different tape Replace with a fresh tape A warped cassette shell cannot be fixed Replace with another tape and test Check input level with signal level meter and use lower rec level when recording Check and secure connections Clean head Demagnetize head with head demagnetizer Change to better tape Check input and ou...

Page 17: ...ency Response 20 dB Type I Normal 20 16 000 Hz 3 dB Type II High CrO2 20 17 000 Hz 3 dB Type IV Metal 20 19 000 Hz 3 dB Harmonic Distortion less than 1 0 Input Sensitivity Impedance Line 100 mV 43 k ohms Output Level Line 570 mV 1 4 k ohms Phones 0 25 mV 8 ohms Channel Separation 1 kHz more than 40 dB Crosstalk 125 Hz more than 55 dB SPECIFICATIONS GENERAL Power Supply U S A and Canada model 120 V...

Page 18: ... I normale 20 16 000 Hz 3 dB Type II élevée CrO2 20 17 000 Hz 3 dB Type IV métal 20 19 000 Hz 3 dB Distorsion harmonique Moins de 1 0 Sensibilité d entrée impédance Ligne 100 mV 43 k ohms Niveau de sortie Ligne 570 mV 1 4 kohms Casque 0 25 mV 8 ohms Séparation des canaux 1 kHz inférieure à 40 dB Diaphonie 125 Hz inférieure à 55 dB GENERALES Alimentation Modèle pour les Etats Unis et le Canada 120 ...

Reviews: