Yamaha K903 Manual

							K-903
OWNER’S MANUAL
MODE D’EMPLOI Natural Sound Stereo Cassette Deck
Platine à cassette stéréo de la série “Natural Sound”
NATURAL SOUND  CASSETTE DECK  K-903
DOLBY NROFF/   B/   CREC LEVELPHONESSTANDBY/ON
MODEO / p / ¸ / RELAY
PLAYBACKDECK ARECORD/PLAYBACKDECK B
MIN MAX
DIRECTION RESETRESET DIRECTION
!Ú
&SEARCH
!Ú
&MUTE/SEARCHREC/PAUSE
EJECTEJECTNORMAL HIGHDUBBING  A # B
CLOSE %% CLOSE 
PLAY PLAY
U C A 
						

							2
Thank you for purchasing this YAMAHA stereo cassette deck.
SAFETY INSTRUCTIONS
ÖExplanation of Graphical Symbols
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert you to the presence of uninsulated
Òdangerous voltageÓ within the products
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 you to the presence
of important operating and maintenance
(servicing) instructions in the literature
accompanying the appliance.
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.
1Read Instructions Ñ All the safety and operating
instructions should be read before the unit is operated.
2Retain Instructions Ñ The safety and operating
instructions should be retained for future reference.
3Heed Warnings Ñ All warnings on the unit and in the
operating instructions should be adhered to.
4Follow Instructions Ñ All operating and other instructions
should be followed.
5Water and Moisture Ñ The unit should not be used near
water Ñ for example, near a bathtub, washbowl, kitchen
sink, laundry tub, in a wet basement, or near swimming
pool, etc.
6Carts and Stands Ñ The unit should be used only with a
cart or stand that is recommended by the manufacturer.
6AA unit and cart combination
should be moved with care. Quick
stops, excessive force, and uneven
surfaces may cause the unit and cart
combination to overturn.
7Wall or Ceiling Mounting Ñ The unit should be mounted
to a wall or ceiling only as recommended by the
manufacturer.
8Ventilation Ñ The unit should be situated so that its
location or position does not interfere with its proper
ventilation. For example, the unit should not be situated on a
bed, sofa, rug or similar surfaces 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.
9Heat Ñ The unit should be situated away from heat
sources such as radiators, stoves, or other units that
produce heat.
10Power Sources Ñ The unit should be connected to a
power supply only of the type described in the operating
instructions or as marked on the unit.
11Power-Cord Protection Ñ 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
attention to receptacles, and the point where they exit from
the unit.
12Cleaning Ñ The unit should be cleaned only as
recommended by the manufacturer.
13No Use Periods Ñ The power cord of the unit should be
unplugged from the outlet when left unused for a long
period of time.
14Object and Liquid Entry Ñ Care should be taken so
that objects do not fall into and liquids not spilled into the
inside of the unit.
15Damage Requiring Service Ñ The unit should be
serviced by qualified service personnel when:
A.The power-supply cord or the plug has been damaged;
or
B.Objects have fallen, or liquid has been spilled into the
unit; or
C.The unit has been exposed to rain; or
D.The unit does not appear to operate normally or exhibits
a marked change in performance; or
E.The unit has been dropped, or the cabinet damaged.
16Servicing Ñ The user should not attempt to service the
unit beyond those means described in the operating
instructions. All other servicing should be referred to
qualified service personnel.
17Grounding or Polarization Ñ The precautions should be
taken so that the grounding or polarization of the unit is not
defeated.
This unit is not disconnected from the AC power source
as long as it is connected to the wall outlet, even if the
unit itself is turned off. This state is called the standby
mode. In this state, the unit is designed to consume a
very small quantity of power.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN
OR MOISTURE. 
						

							3
ENGLISH FRAN‚AIS DEUTSCH SVENSKA ITALIANO ESPA„OL DUTCH
CAUTION: READ THIS BEFORE OPERATING
YOUR UNIT.
1.This unit is a sophisticated stereo cassette deck. To ensure
proper operation for the best possible performance, please
read this manual carefully.
2.Choose the installation location of your unit carefully. Avoid
placing it in direct sunlight or close to source of heat. Also
avoid locations subject to vibration and excessive dust, heat,
cold or moisture. Keep it away from sources of hum such as
transformers or motors.
3.Do not open the cabinet as this may result in damage to the
deck or electrical shock. If a foreign object should get into
the deck, contact your local dealer.
4.When removing the power plug from the wall outlet, always
pull directly on the plug; never pull the cord itself.
5.Do not apply excessive force when operating switches and
knobs.
6.When moving the deck, be sure to first pull out the power
plug and remove all cords connecting the deck to other
equipment.
7.Do not attempt to clean this unit with chemical solvents as
this may damage the finish. Use a clean, dry cloth.
8.Never allow metallic items (e.g. screwdrivers, tools, etc.) to
come near the record/playback head assembly. Doing so
may not only scratch or damage the headÕs mirror-smooth
finish, it may also change the magnetic characteristics of the
heads, causing a deterioration in reproduction quality.
9.Although the record/playback head used in this unit is a high
quality head with outstanding reproduction characteristics, it
can become dirty through the use of old tapes or from dust
accumulation over time. This can have a serious effect on
reproduction quality. Clean the heads regularly with one of
the commonly available head cleaners or with cleaning
solutions as explained later in this manual.
10.Be sure to read the ÒTROUBLESHOOTINGÓ section of this
manual for advice on common operating errors before
concluding that your unit is faulty.
11.Keep this manual in a safe  place for future reference.
12. Voltage Selector (General model only)
The voltage selector on the rear panel of this unit must
be set for your local mains voltage BEFORE plugging in
the AC mains supply. (Voltage selector adjustable
between 110/120/220/240 V AC.)
Note
Please check the copyright laws in your country to record from
records, compact discs, radio, etc.  Recording of copyright
material may infringe copyright laws.
FOR CANADIAN CUSTOMERS
TO PREVENT ELECTRIC SHOCK, MATCH WIDE
BLADE OF PLUG TO WIDE SLOT AND FULLY
INSERT.
THIS CLASS B DIGITAL APPARATUS MEETS ALL
REQUIREMENTS OF THE CANADIAN
INTERFERENCE-CAUSING EQUIPMENT
REGULATIONS.
We Want You Listening For A Lifetime
YAMAHA and the Electronic Industries Associations
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 Ð 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 Industries
Associations Consumer Electronics
Group recommend you avoid prolonged
exposure to excessive volume levels.
We
Want You
LISTENINGFor A Lifetime
FCC INFORMATION (U.S.A.)
1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the
instructions contained in this manual, meets FCC
requirements.  Modifications not expressly approved by
Yamaha may void your authority, granted by the FCC, to
use the product.
2. IMPORTANT: When connecting this product to
accessories and/or another product use only high quality
shielded cables.  Cables supplied with this product
MUST be used.  Follow all installation instructions.
Failure to follow instructions could void your FCC
authorization to use this product in the USA.
3. NOTE: This product has been tested and found to
comply with the requirements listed in FCC Regulations,
Part 15 for Class B digital devices.  Compliance with
these requirements provides a  reasonable level of
assurance that your use of this product in a residential
environment will not result in harmful interference with
other electronic devices.  This equipment generates/uses
radio frequencies and, if not installed and used
according to the instructions found in the users manual,
may cause interference harmful to the operation of other
electronic devices.  Compliance with FCC regulations
does not guarantee that interference will not occur in all
installations.  If this product is found to be the source of
interference, which can be determined by turning the unit
OFF and ON, please try to eliminate the problem by
using one of the following measures:
Relocate either this product or the device that is being
affected by the interference.
Utilize power outlets that are on different branch (circuit
breaker or fuse) circuits or install AC line filter/s.
In the case of radio or TV interference, relocate/reorient
the antenna.  If the antenna lead-in is 300 ohm ribbon
lead, change the lead-in to coaxial type cable.
If these corrective measures do not produce satisfactory
results, please contact your local retailer that is
authorized to distribute this type of product.  If you
cannot locate the appropriate retailer, please contact
Yamaha Electronics Corp., U.S.A.
6660 Orangethorpe Ave, Buena Park, CA 90620
The above statements apply ONLY to those products
distributed by Yamaha Corporation of America or its
subsidiaries. 
						

							4
TABLE OF CONTENTS
FEATURES ......................................................................... 4
CONNECTIONS .................................................................. 5
NOTES ON THIS MANUAL ................................................ 5
PLAYBACK (Common to DECKs A and B) ......................... 6
BASIC OPERATION ........................................................ 6
SELECTION SEARCH .................................................... 8
RELAY PLAYBACK ......................................................... 9
RECORDING .................................................................... 10
BASIC OPERATION ...................................................... 10
REC MUTE OPERATION .............................................. 12
REC RETURN OPERATION ......................................... 12DUBBING (From DECK A to DECK B) ............................. 13
CASSETTE TAPES .......................................................... 14
MAINTENANCE ................................................................ 15
OPTIONAL REMOTE CONTROL TRANSMITTER .......... 15
TROUBLESHOOTING ...................................................... 16
SPECIFICATIONS ............................................................ 17
FEATURES
ÖHigh Quality Hard Permalloy Recording/Playback Head in
Deck B and Playback Head in Deck A
ÖDolby B/C Noise Reduction
ÖAuto Tape Selector
ÖRelay Playback from DECK A to DECK B
ÖSelection SearchÖRecording Mute Function
ÖRec Return Operation
ÖEasy Dubbing Operation at Selectable Speed (Normal/
High)
ÖPeak Level Meters with Peak Hold Function
ÖRemote Control Capability with Optional Remote Control
Transmitter
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
ÒDOLBYÓ and the double-D symbol  are trademarks of
Dolby Laboratories Licensing Corporation. 
						

							5
ENGLISH FRAN‚AIS DEUTSCH SVENSKA ITALIANO ESPA„OL DUTCHPLAY LINE IN-LINE OUT
L
R
TAPE PB REC OUT
L
R
3REC4
CONNECTIONS
To an AC outlet
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 locations of the buttons of DECK A and DECK B are the same, you can easily find the desired
button even when operating DECK A.
Main operation buttons of DECK A
(U.S.A. model)
Amplifier or receiver
REAR PANEL CONNECTIONS
Make sure that power to both the deck and your amplifier/receiver is turned off
before making any connections.
ÖThe White plug on the paired connecting cables corresponds to the Left
channel and the Red plug corresponds to the Right channel. Make sure that
the left and right channel connections are properly made, and that the plugs
are inserted firmly.
ÖThe LINE OUT/PLAY jacks on the deck should be connected to the TAPE PB
(Playback/Input) jacks on your amplifier/receiver, and the LINE IN/REC jacks
on the deck should be connected to the REC OUT (Recording/Output) jacks
on your amplifier/receiver.
ÖThe LINE OUT terminals on this unit are numbered 3 and the LINE IN jacks
are numbered 4. When connecting this unit to a YAMAHA amplifier or
receiver whose terminals are numbered 1, 2, 3, 4 ... (etc.), connect this
units LINE OUT terminals to the input terminals numbered 3 and connect this
units LINE IN terminals to the output terminals numbered 4 on the rear panel
of the amplifier or receiver.
ÖConnect the power cord to an AC wall outlet or to an AC outlet on the rear
panel of your amplifier/receiver (if provided).
NATURAL SOUND  CASSETTE DECK  K-903
DOLBY NROFF/      B/      CREC LEVELPHONES
STANDBY/ON
MODEO / p / ¸ / RELAY
PLAYBACKDECK AStabilizerRECORD/PLAYBACKDECK B
MIN MAX
Cassette StabilizerCassetteCLOSE 
%% CLOSEDIRECTION RESETRESET DIRECTION
!Ú
&SEARCH
!Ú
&MUTE/SEARCHREC/PAUSE PLAY PLAY
EJECTEJECTNORMAL HIGHDUBBING  A # B
Main operation buttons of DECK B 
						

							6
PLAYBACK (Common to DECKs A and B)
Preparation for playback
ÖTurn on the STANDBY/ON switch.
ÖSet your amplifier or receiver to cassette deck function mode.
BASIC OPERATION - To play back a cassette tape
EJECT
DOLBY NROFF/ B/ C
Refer to the following
description.
MODEÒ/[/Ó/RELAY
2 1
35
4
Refer to the following
description.
DIRECTIONSelect the tape running direction for DECK A
or B.  Each time this button is pressed, the
tape running direction changes between
forward (#) and reverse (@), and the
corresponding indicator lights on the display.
To stop playback
Press the & button.  To remove the cassette tape, press the
EJECT button.  The cassette compartment door opens.  To
set the unit to standby mode, press the STANDBY/ON
button.
To set the counter reading to Ò0000Ó
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 the tape running indicator # is lit:
Pressing the Ú button fast forwards the tape while
pressing the ! button rewinds the tape.
When the tape running indicator @ is lit:
Pressing the ! button fast forwards the tape while
pressing the Ú button rewinds the tape.
Insert the cassette with the exposed tape side facing down.  (The side
facing you is called the forward side and the opposite side is called the
reverse side.)  To close the compartment, push the section of the
compartment door marked % CLOSE until it locks shut.
PLAY
NATURAL SOUND  CASSETTE DECK  K-903
DOLBY NROFF/       B/       CREC LEVELPHONES
DIRECTION
STANDBY/ON
MODE
O / p / ¸ / RELAY
!Ú
&SEARCHPLAY PLAY
EJECT
NORMALHIGHDUBBING  A # B
!Ú
&MUTE/SEARCH REC/PAUSE
EJECTRESET
RESET DIRECTION
Stabilizer
% CLOSE CLOSE %
PLAYBACKDECK ACassetteRECORD/PLAYBACKDECK BStabilizer Cassette
MIN MAX
2 3
1STANDBY/ONPHONES
RESET!45Ú
& 
						

							7
ENGLISH FRAN‚AIS DEUTSCH SVENSKA ITALIANO ESPA„OL DUTCH
DOLBY NR selector setting (in step 2)
Be sure to set the DOLBY NR selector according to the
system used for recording.
OFF: For a tape recorded with DOLBY NR OFF.
 B: For a tape recorded with DOLBY B NR.
 C: For a tape recorded with DOLBY C NR.
REVERSE MODE selector setting (in step 3)
The auto reverse function allows the tape running direction
be reversed automatically.  Select an auto reverse mode
(
 ,, or RELAY) or manual reverse mode
(
).
: When playback or fast forwarding (or rewinding) of
one side of a tape is finished, the deck stops at the
end of the tape.
: Both sides of the tape are played back.  After
playing, the deck stops at the end of the tape.
(When the tape running direction is set to Û, only
the reverse side is played.)
:  Both sides of the tape are repeatedly played back
(up to 8 times).
RELAY: Cassette tapes loaded in DECKs A and B
are played back sequentially. (See ÒRELAY
PLAYBACKÓ on page 9.)
Display during playback
Tape counter
Tape counter
Peak level meters
Indicate the peaks of the signal levels during recording and playback over a Ð30 dB to +6 dB range.  There are separate meters for each left
and right channel.  These level meters have a peak hold function which holds the peak level for about 1.5 seconds.
Û
30 dB Ð
ANORMÜ
R L20 15 10 8 6   4 2 0 2 4 6+ 
Û
BÜ
RELAYDUB HIGH RECB C
The A or B indicator shown in
the display represents the
last deck operated.
Note
Never press the EJECT button when the tape is in motion. To adjust the volume level
Use the volume control of the amplifier or receiver.
To use headphones
Insert the headphones plug into the PHONES jack.  Since
the sound is also heard from the speakers, operate the
amplifier to cut off the sound from the speakers for private
listening.
Tape running direction
indicator (DECK A)Tape running direction
indicator (DECK B) 
						

							8
Notes
ÖThe blank interval between selections must be at least 4 seconds long.
ÖSelection search may not operate properly with tapes recorded at a low recording level or which have excessive noise.
SELECTION SEARCH - To play back a desired 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
ÖOperate the following buttons when the beginning of the current selection is being played.
When the # tape running indicator is lit:
When the @ tape running indicator is lit:
Press
simultaneously.
ÚMUTE/SEARCH!MUTE/SEARCH
MUTE/SEARCH!
Press
simultaneously.
Press
simultaneously.
ÚMUTE/SEARCH
Press
simultaneously.
!MUTE/SEARCH
Press
simultaneously.MUTE/SEARCH
Ú
Press
simultaneously.
NATURAL SOUND  CASSETTE DECK  K-903
DOLBY NROFF/      B/      CREC LEVELPHONES
STANDBY/ON
MODEO / p / ¸ / RELAY
PLAYBACKDECK AStabilizerRECORD/PLAYBACKDECK B
MIN MAX
Cassette StabilizerCassette
DIRECTION RESETRESET DIRECTION
!Ú
&SEARCH
!Ú
&MUTE/SEARCHREC/PAUSE
EJECTEJECTNORMAL HIGHDUBBING  A # B
RESET!ÚMUTE/SEARCH
CLOSE %% CLOSE
PLAY PLAY 
						

							9
ENGLISH FRAN‚AIS DEUTSCH SVENSKA ITALIANO ESPA„OL DUTCH
RELAY PLAYBACK - To play DECK A and DECK B sequentially
Load the cassette tapes into DECKs 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) DECK B ( forward side \ reverse side)
Ö When the tape running direction is set to ª, only the reverse side is played.
When the MODE button is set to 
:
DECK A (forward side or reverse side) DECK B (forward side or reverse side)Display
5
Up to 8 times
Up to 8 times
5
Up to 8 times
RELAY
5
NATURAL SOUND  CASSETTE DECK  K-903
DOLBY NROFF/      B/      CREC LEVELPHONES
STANDBY/ON
MODEO / p / ¸ / RELAY
PLAYBACKDECK AStabilizerRECORD/PLAYBACKDECK B
MIN MAX
Cassette StabilizerCassette
DIRECTION RESETRESET DIRECTION
!Ú
&SEARCH
!Ú
&MUTE/SEARCHREC/PAUSE
EJECTEJECTNORMAL HIGHDUBBING  A # B
MODE
CLOSE %% CLOSE
PLAY PLAY 
						

							10
RECORDING
EJECT
Recording
starts. Play the program source to be
recorded and adjust the
recording level.
1
67
Preparation for recording
ÖTurn on the STANDBY/ON switch.
ÖSet your amplifier or receiver to cassette deck function mode.
BASIC OPERATION - To record a program source
MIN MAX
3DOLBY NROFF/ B/ C
2
Insert the cassette into DECK B with the
exposed tape side facing down.  (The
side facing you is called the forward side
and the opposite side is called the
reverse side.)
To close the compartment, push the
section of the compartment door marked
% CLOSE until it locks shut.
4
Select the tape running direction.
(Press the DIRECTION button for DECK B.) Each
time the button is pressed, the tape running direction
changes between forward (#) and reverse (@), and
the indicator lights on the display.
5
The REC indicator
lights on the display.
The deck enters the
Rec/Pause mode.
REC/PAUSEDIRECTION
MODEÒ/[/Ó/RELAY
Refer to the following
description.Refer to the following
description.
PLAY
NATURAL SOUND  CASSETTE DECK  K-903
DOLBY NROFF/       B/       CREC LEVELPHONES
DIRECTION
STANDBY/ON
MODE
O / p / ¸ / RELAY
!Ú
&SEARCH
EJECT
NORMALHIGHDUBBING  A # B
!Ú
&MUTE/SEARCH REC/PAUSE
EJECTRESET
RESET DIRECTION
StabilizerPLAYBACKDECK ACassetteRECORD/PLAYBACKDECK BStabilizer Cassette
MIN MAX
2 3
STANDBY/ONPHONES
RESET!47Ú
&
5
6MUTE/SEARCH
PLAY PLAY%
 CLOSE CLOSE %
1
REC LEVEL