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 NR
OFF/ B/ C
REC LEVEL
PHONES
STANDBY/ON
MODE
O / p / ∏ / RELAY
PLAYBACK
DECK A
RECORD/PLAYBACK
DECK B
MIN MAX
DIRECTION RESETRESET DIRECTION
! ⁄
&
SEARCH
!⁄
&
MUTE/SEARCH
REC/PAUSE
EJECT EJECT
NORMAL HIGH
DUBBING A # B
CLOSE % % CLOSE
PLAYPLAY
U C A
2
Thank you for purchasing this YAMAHA stereo cassette deck.
SAFETY INSTRUCTIONS
÷ Explanation of Graphical Symbols
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert you 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 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.
1 Read Instructions — All the safety and operating
instructions should be read before the unit is operated.
2 Retain Instructions — The safety and operating
instructions should be retained for future reference.
3 Heed Warnings — All warnings on the unit and in the
operating instructions should be adhered to.
4 Follow Instructions — All operating and other instructions
should be followed.
5 Water and Moisture — The unit should not be used near
water — for example, near a bathtub, washbowl, kitchen
sink, laundry tub, in a wet basement, or near swimming
pool, etc.
6 Carts and Stands — The unit should be used only with a
cart or stand that is recommended by the manufacturer.
6A A 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.
7 Wall or Ceiling Mounting — The unit should be mounted
to a wall or ceiling only as recommended by the
manufacturer.
8 Ventilation — 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.
9 Heat — The unit should be situated away from heat
sources such as radiators, stoves, or other units that
produce heat.
10 Power Sources — The unit should be connected to a
power supply only of the type described in the operating
instructions or as marked on the unit.
11 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
attention to receptacles, and the point where they exit from
the unit.
12 Cleaning — The unit should be cleaned only as
recommended by the manufacturer.
13 No Use Periods — The power cord of the unit should be
unplugged from the outlet when left unused for a long
period of time.
14 Object and Liquid Entry — Care should be taken so
that objects do not fall into and liquids not spilled into the
inside of the unit.
15 Damage Requiring Service — 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.
16 Servicing — 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.
17 Grounding or Polarization — 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
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
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 head’s 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 “TROUBLESHOOTING” 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 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 Industries
Association's Consumer Electronics
Group recommend you avoid prolonged
exposure to excessive volume levels.
We
Want You
LISTENING
For 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 ......................................... 12
DUBBING (From DECK A to DECK B) ............................. 13
CASSETTE TAPES .......................................................... 14
MAINTENANCE ................................................................ 15
OPTIONAL REMOTE CONTROL TRANSMITTER .......... 15
TROUBLESHOOTING ...................................................... 16
SPECIFICATIONS ............................................................ 17
FEATURES
÷ High Quality Hard Permalloy Recording/Playback Head in
Deck B and Playback Head in Deck A
÷ Dolby B/C Noise Reduction
÷ Auto Tape Selector
÷ Relay Playback from DECK A to DECK B
÷ Selection Search
÷ Recording Mute Function
÷ Rec Return Operation
÷ Easy Dubbing Operation at Selectable Speed (Normal/
High)
÷ Peak Level Meters with Peak Hold Function
÷ Remote Control Capability with Optional Remote Control
Transmitter
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol are trademarks of
Dolby Laboratories Licensing Corporation.
5
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
PLAY
LINE IN-LINE OUT
L
R
TAPE PBREC OUT
L
R
3
REC
4
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.
÷ The 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.
÷ The 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.
÷ The 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
unit's LINE OUT terminals to the input terminals numbered 3 and connect this
unit's LINE IN terminals to the output terminals numbered 4 on the rear panel
of the amplifier or 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).
NATURAL SOUND CASSETTE DECK K-903
DOLBY NR
OFF/ B/ C
REC LEVEL
PHONES
STANDBY/ON
MODE
O / p / ∏ / RELAY
PLAYBACK
DECK A
Stabilizer
RECORD/PLAYBACK
DECK B
MIN MAX
CassetteStabilizerCassette
CLOSE
% %
CLOSE
DIRECTION RESETRESET DIRECTION
! ⁄
&
SEARCH
!⁄
&
MUTE/SEARCH
REC/PAUSE
PLAYPLAY
EJECT EJECT
NORMAL HIGH
DUBBING A # B
Main operation buttons of DECK B
6
PLAYBACK (Common to DECKs A and B)
Preparation for playback
÷ Turn on the STANDBY/ON switch.
÷ Set your amplifier or receiver to cassette deck function mode.
BASIC OPERATION - To play back a cassette tape
EJECT
DOLBY NR
OFF/ B/ C
Refer to the following
description.
MODE
“/[/”/
RELAY
21
35
4
Refer to the following
description.
DIRECTION
Select 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 “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 the tape running indicator # is lit:
Pressing the ⁄ 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 ⁄ 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 NR
OFF/ B/ C
REC LEVEL
PHONES
DIRECTION
STANDBY/ON
MODE
O / p / ∏ / RELAY
! ⁄
&
SEARCH
PLAY PLAY
EJECT
NORMAL HIGH
DUBBING A # B
!⁄
&
MUTE/SEARCH REC/PAUSE
EJECT
RESET
RESET DIRECTION
Stabilizer
%
CLOSECLOSE
%
PLAYBACK
DECK A
Cassette
RECORD/PLAYBACK
DECK B
StabilizerCassette
MIN MAX
23
1
STANDBY/ON
PHONES
RESET
!
45
⁄
&
7
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
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 ¤, 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 “RELAY
PLAYBACK” 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 –30 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.
¤
30 dB
—
A
NORM
‹
R
L
20 15 10 8 6 4 2 0 2 4 6
+
¤
B
‹
RELAY
DUB 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
÷ The blank interval between selections must be at least 4 seconds long.
÷ Selection 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
÷ Operate 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.
⁄
MUTE/SEARCH
!
MUTE/SEARCH
MUTE/SEARCH
!
Press
simultaneously.
Press
simultaneously.
⁄
MUTE/SEARCH
Press
simultaneously.
!
MUTE/SEARCH
Press
simultaneously.
MUTE/SEARCH
⁄
Press
simultaneously.
NATURAL SOUND CASSETTE DECK K-903
DOLBY NR
OFF/ B/ C
REC LEVEL
PHONES
STANDBY/ON
MODE
O / p / ∏ / RELAY
PLAYBACK
DECK A
Stabilizer
RECORD/PLAYBACK
DECK B
MIN MAX
CassetteStabilizerCassette
DIRECTION RESETRESET DIRECTION
! ⁄
&
SEARCH
!⁄
&
MUTE/SEARCH
REC/PAUSE
EJECT EJECT
NORMAL HIGH
DUBBING A # B
RESET
!⁄
MUTE/SEARCH
CLOSE
% %
CLOSE
PLAYPLAY
9
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
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)
÷ When the tape running direction is set to ™, 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 NR
OFF/ B/ C
REC LEVEL
PHONES
STANDBY/ON
MODE
O / p / ∏ / RELAY
PLAYBACK
DECK A
Stabilizer
RECORD/PLAYBACK
DECK B
MIN MAX
CassetteStabilizerCassette
DIRECTION RESETRESET DIRECTION
! ⁄
&
SEARCH
!⁄
&
MUTE/SEARCH
REC/PAUSE
EJECT EJECT
NORMAL HIGH
DUBBING A # B
MODE
CLOSE
% %
CLOSE
PLAYPLAY
10
RECORDING
EJECT
Recording
starts.
Play the program source to be
recorded and adjust the
recording level.
1
67
Preparation for recording
÷ Turn on the STANDBY/ON switch.
÷ Set your amplifier or receiver to cassette deck function mode.
BASIC OPERATION - To record a program source
MIN MAX
3
DOLBY NR
OFF/ 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/PAUSE
DIRECTION
MODE
“/[/”/
RELAY
Refer to the following
description.
Refer to the following
description.
PLAY
NATURAL SOUND CASSETTE DECK K-903
DOLBY NR
OFF/ B/ C
REC LEVEL
PHONES
DIRECTION
STANDBY/ON
MODE
O / p / ∏ / RELAY
! ⁄
&
SEARCH
EJECT
NORMAL HIGH
DUBBING A # B
!⁄
&
MUTE/SEARCH REC/PAUSE
EJECT
RESET
RESET DIRECTION
Stabilizer
PLAYBACK
DECK A
Cassette
RECORD/PLAYBACK
DECK B
StabilizerCassette
MIN MAX
23
STANDBY/ON
PHONES
RESET
!
47
⁄
&
5
6
MUTE/SEARCH
PLAY PLAY
%
CLOSECLOSE
%
1
REC LEVEL
11
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
¤
30 dB
—
A
‹
R
L
20 15 10 8 6 4 2 0 2 4 6
+
¤
B
‹
REC
RELAY
B C
DOLBY NR selector setting (in step 2)
Set the DOLBY NR selector according to your purpose.
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.
REVERSE MODE selector setting (in step 3)
The auto reverse function allows the tape running direction
to be reversed automatically. Select the auto reverse mode
(
) or manual reverse mode ( ).
: When recording on one side of a tape is finished, the
deck stops at the end of the tape.
:Both sides of a tape are recorded. After recording,
the deck stops at the end of the tape.
÷ When the tape running direction is set to ™, only
the reverse side is recorded.
÷ If you select
or
RELAY
, the reverse mode
automatically switches to
in step 5.
Display during recording
Peak level meters
Indicate the peaks of the signal levels during recording and playback over a –30 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.
Tape counter
Use the tape counter to aid in locating a point on a tape (0000 to 9999).
To set the counter reading to “0000”, press the RESET button.
The A or B indicator shown in
the display represents the
last deck operated.
Setting the recording level (in step 6)
Play the loudest passage of the source to be recorded and
watch the meter readings.
Adjust the REC LEVEL control so that the highest peak
reaches +4 of the optimum recording level.
To stop recording:
Press the & button.
To stop recording temporarily:
Press the REC/PAUSE button. To resume recording, press
the PLAY button.
REC indicator
DOLBY B/ C indicator
MODE indicator
Tape running direction indicator
12
REC MUTE OPERATION - Inserting a blank space during recording
REC RETURN OPERATION - To return to the point at which the recording started
A 4-second blank interval is automatically recorded on the
tape and then the deck enters Rec/Pause mode.
If a blank interval longer than 4 seconds is desired, keep
pressing for as long as you want. When the MUTE/
SEARCH button is released, the deck 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 lit:
÷ If you press the PLAY button during recording, Rec Return
automatically rewinds the tape to the point where the
PLAY button was pressed.*
If you reset the tape counter to “0000” during recording,
Rec Return automatically rewinds the tape to the “0000”
point.
Rec Return functions according to the most recent
operation. For example, if you reset the tape counter to
“0000” and then press the PLAY button later, Rec Return
rewinds to the point where the PLAY button was pressed.
* The PLAY button cannot be used to mark a return point
while dubbing.
MUTE/SEARCH
Synchronized recording function
When operating this unit in combination with the
YAMAHA CD Player which has SYNCHRO button on its
remote control transmitter, CD Synchronized recording
function can be utilized. This function is operated with
the remote control transmitter of the CD Player.
(Regarding the operation, refer to the manual of the CD
Player.)
NATURAL SOUND CASSETTE DECK K-903
DOLBY NR
OFF/ B/ C
REC LEVEL
PHONES
STANDBY/ON
MODE
O / p / ∏ / RELAY
PLAYBACK
DECK A
Stabilizer
RECORD/PLAYBACK
DECK B
MIN MAX
CassetteStabilizerCassette
DIRECTION RESETRESET DIRECTION
! ⁄
&
SEARCH
!⁄
&
MUTE/SEARCH
REC/PAUSE
EJECT EJECT
NORMAL HIGH
DUBBING A # B
!⁄
MUTE/SEARCH
CLOSE
% %
CLOSE
PLAYPLAY
13
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
DUBBING (From DECK A to DECK B)
12
Set the MODE selector to
or position.
If you select or
RELAY
, the reverse
mode automatically switches to
.
Set the
DIRECTION
buttons for DECKs
A and B.
3
Set the dubbing speed to either NORMAL
(normal speed) or HIGH (twice the normal
speed) with the DUBBING buttons*.
Dubbing starts automatically.
DUBBING A # B
NORMAL HIGH
The corresponding NORM
or HIGH indicator lights on
the display.
* Higher quality sound will be obtained with the
NORMAL setting.
Note
During dubbing, Dolby NR is automatically set to off and the
recorded tape can be dubbed as is. (When the tape to be
dubbed is recorded with Dolby NR, this effect is also
dubbed.)
To stop dubbing
Press the & button. (If you press the & button on DECK B,
both decks stop simultaneously and the dubbing mode is
cancelled. If you press the & 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 stops
and then DECK A stops.
When the tape in DECK A reaches its end, DECK A stops
and DECK B stops after providing a blank section of about 4
seconds.
Available operations while dubbing
The Rec Return function can be carried out on DECK B.
Refer to “REC RETURN OPERATION” on the previous
page.
You can make dubbing from DECK A to DECK B. Open the cassette compartments by pressing the EJECT buttons and load a
blank cassette tape in DECK B and the original cassette tape in DECK A.
Display during dubbing
MODE
“/[/”/
RELAY
DIRECTION
NORM or HIGH
indicator lights during
dubbing.
Lights during dubbing.
NATURAL SOUND CASSETTE DECK K-903
DOLBY NR
OFF/ B/ C
REC LEVEL
PHONES
STANDBY/ON
MODE
O / p / ∏ / RELAY
PLAYBACK
DECK A
Stabilizer
RECORD/PLAYBACK
DECK B
MIN MAX
CassetteStabilizerCassette
DIRECTION RESETRESET DIRECTION
! ⁄
&
SEARCH
!⁄
&
MUTE/SEARCH
REC/PAUSE
EJECT EJECT
NORMAL HIGH
DUBBING A # B
3
2
1
¤
30 dB
–
A
NORM
‹
R
L
20 15 10 8 6 4 2 0 2 4 6
+
¤
B
‹
RELAY
DUB HIGH RECB C
CLOSE
% %
CLOSE
PLAYPLAY
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 tone controls
of your amplifier/receiver during playback.
Detector slotsDetector slots
TYPE II TYPE IV
15
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
With the optional remote control transmitter RKX1, you can
operate this unit at your listening position. For details, refer
to the instruction manual supplied with the remote control
transmitter.
REMOTE CONTROL OPERATION RANGE
MAINTENANCE
CLEANING OF THE TAPE PATH
Continued high quality performance of your deck is
dependent upon periodic cleaning of the heads, capstan,
pinch roller, and all surfaces over which the tape travels.
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, enough residual magnetism will
build up on the heads to cause poor high frequency
reproduction. At this time you should use a commercially
available cassette tape-type head demagnetizer.
÷ When cleaning the tape path or demagnetizing the heads,
be sure to follow carefully the instructions of the
concerning materials such as cleaning fluid or head
demagnetizer.
CapstanCapstan
Pinch rollerPinch roller
Heads
OPTIONAL REMOTE CONTROL TRANSMITTER
DECK B
SINGLE DECK
INTRO SCAN
DOUBLE DECK
DUBBING
DECK A/B DIR A DIR B
COUNTER
RESET
PLAY
SEARCH
REC/PAUSE REC MUTE
STOP
RKX1
s
¤‹
!
!
⁄
⁄
30°
30°
7 m (23 feet)
Remote sensor
16
If your cassette deck fails to operate normally, check the following table. It lists common operating errors and simple measures
which you can take to correct the problem. If it cannot be corrected, or the symptom is not listed, disconnect the deck’s power
cord and contact your authorized YAMAHA dealer or authorized service center for help.
Cause
÷ Power plug is not properly plugged in.
÷ Cassette shell is warped or damaged.
÷ There is an influence of strong external
noise (lightning, excessive static
electricity, etc.) or a misoperation was
performed while using this unit.
÷ No cassette tape loaded.
÷ Protective tabs are broken off.
÷ Head is dirty.
÷ Head is magnetized.
÷ Tape is damaged or of poor quality.
÷ Tape is bad (stretched, deformed, etc.).
÷ Cassette shell is warped.
÷ Recording level is too high.
÷ Faulty connection between deck and
stereo amplifier/receiver.
÷ Head is dirty.
÷ Head is magnetized.
÷ Worn out or poor quality tape.
÷ Connection(s) improperly made.
÷ Affected by external electrical noise.
÷ Dirty capstan, pinch roller, etc., or poor
tape.
÷ Tape is wound unevenly.
÷ Slack tape, or tape spillage wound
around capstan.
÷ REC LEVEL control is set to too low.
÷ Protective tabs are broken off.
÷ Blank section is too short.
÷ Recorded section has low-level portions.
÷ Conversation, etc. has been recorded.
÷ Dolby NR-recorded tape is played back
in OFF position.
Cure
÷ Reinsert plug properly.
÷ Do not play damaged tapes.
÷ Turn the unit off and disconnect the AC
power from the AC outlet. After about
30 seconds have passed, connect the
power and try again.
÷ Load a cassette tape.
÷ Change tape or cover protective hole
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 output connections
and reinsert properly.
÷ Move deck away from electrical
appliances (TV, fluorescent light,
electric blanket, etc.).
÷ Clean capstan and pinch roller, or
change to better tape.
÷ Rewind tape.
÷ Insert pencil in hole in cassette shell
and turn to take up slack.
÷ Adjust REC LEVEL control.
÷ Change tape or cover protective hole
with adhesive tape.
÷ Blank sections must be at least 4
seconds long.
÷ No remedy
÷ No remedy
÷ Play back in appropriate Dolby NR
position.
Fault
Tape doesn’t move in recording or
playback.
If it happens that this unit does not
work normally.
REC/PAUSE button fails to function.
Sounds become faint and sometimes
inaudible.
Recorded sound is distorted.
Tape is playing back, but no sound is
heard.
Excessive noise.
Excessive wow (wavering of the
sound).
Tape stops in the middle of recording
or playback.
Fails to record.
Search does not operate correctly.
High frequencies in the playback
sound are emphasized and unpleasant
to listen to, and noise level (hiss) is
also high.
TROUBLESHOOTING
17
ENGLISHFRANÇAISDEUTSCHSVENSKAITALIANOESPAÑOLDUTCH
Cause
÷ Normally-recorded tape is played back in
Dolby NR.
÷ Heads are dirty.
÷ Heads are magnetized.
÷ Basic levels are different for different
cassette decks.
÷ The batteries are exhausted.
÷ The remote control transmitter is
operated from an incorrect distance or
angle.
÷ The remote control sensor is lighted
strongly.
Cure
÷ Play back in OFF position.
÷ Clean heads and carry out
demagnetization with head
demagnetizer.
÷ This is not a fault.
÷ Replace batteries.
÷ Operate it from less than 7 meters
(about 23 ft.) and 30°.
÷ Place the unit away from the strong
light.
Fault
Playback sound is muffled and high
frequencies are inaudible.
When playing back tapes recorded on
other decks, meter deflections are
greater (smaller) than when recorded.
The remote control transmitter cannot
be operated.
Type..................................... Auto reverse 4-track, 2-channel
recording and playback stereo double cassette deck
Motors .........................................DC servo motor x 2 (main)
Heads ....................Recording/playback: Hard Permalloy x 1
Erase: Double-gap Ferrite x 1
Playback: Hard Permalloy x 1
Rapid Transport .......................................... 100 sec. (C-60)
Wow and Flutter
WRMS ......................................................................0.08%
W.Peak ...................................................................±0.15%
Signal-to-Noise Ratio
(Dolby NR off)...........................................................58 dB
(Dolby B NR on) .......................................................66 dB
(Dolby C NR on) .......................................................74 dB
Frequency Response (–20 dB)
Type I/Normal.............................. 20 ~ 16,000 Hz ±3 dB
Type II/High (CrO
2) .................... 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 .................................................. 120 V, 60 Hz
Power Consumption ............................11 W/7 W (Standby)
Dimensions (W x H x D)...................... 435 x 146 x 279 mm
(17-1/8" x 5-3/4" x 11")
Weight ........................................................... 5.0 kg (11 lbs.)
Accessory
Audio cord................................................................ 1 pair
* Specifications subject to change without notice.
32
Problème
Le son de lecture est étouffé et les
hautes fréquences sont inaudibles.
Lors de la lecture de bandes
enregistrées sur d’autres platines, les
déflexions du compteur sont plus
grandes (plus petites) qu’à
l’enregistrement.
La télécommande ne fonctionne pas.
Remède
÷ Lire en position OFF.
÷ Nettoyer les têtes et effectuer la
démagnétisation avec un
démagnétiseur de tête.
÷ Ceci n’est pas un défaut.
÷ Remplacer la pile.
÷ La faire fonctionner à moins de 7
mètres et sur 30°.
÷ Placer l’appareil à l’abri de lumières
fortes.
Cause
÷ Une bande enregistrée normalement est
lue avec Dolby NR.
÷ Les têtes sont sales.
÷ Les têtes sont magnétisées.
÷ Les niveaux de base sont différents pour
diverses platines.
÷ La pile est déchargée.
÷ La télécommande est actionnée d’une
distance ou sous un angle incorrects.
÷ Le détecteur de la télécommande est
fortement éclairé.
Configuration des pistes ............. Platine à cassette double
stéréo avec inversion automatique pour l’enregistrement et
la lecture, 4 pistes, 2 canaux
Moteur ..............Moteur asservi CC x 2 (moteurs principaux)
Têtes...................Enregistrement/Lecture: Permalloy dur x 1
Effacement: Ferrite à double entrefer x 1
Lecture: Permalloy dur x 1
Transport rapide................................. 100 secondes (C-60)
Pleurage et scintillement
Eff., pondéré........................................................... 0,08%
Crête, pondéré ..................................................... ±0,15%
Rapport signal/bruit
(Dolby NR à l’arrêt)...............................................58 dB
(Dolby B NR en marche) ......................................66 dB
(Dolby C NR en marche) ......................................74 dB
Réponse en fréquence (–20dB)
Type I/normale ............................ 20 ~ 16.000 Hz ±3 dB
Type II/élevée (CrO
2) .................. 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 k-ohms
Casque.....................................................0,25 mV/8 ohms
Séparation des canaux (1 kHz) ...............inférieure à 40 dB
Diaphonie (125 Hz) ...................................inférieure à 55 dB
GENERALES
Alimentation .................................................... 120 V, 60 Hz
Consommation ......................................... 11 W/7 W (Veille)
Dimensions (L x H x P) ....................... 435 x 146 x 279 mm
Poids ........................................................................... 5,0 kg
Câbles audio ......................................................... 1 paire
* Les caractéristiques techniques sont sujettes à des
changements sans préavis.
CARACTERISTIQUES TECHNIQUES
YAMAHA ELECTRONICS CORPORATION, USA 6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A.
YAMAHA CANADA MUSIC LTD. 135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA
YAMAHA ELECTRONIK EUROPA G.m.b.H. SIEMENSSTR, 22-34, 25462 RELLINGEN, BEI HAMBURG, F.R. OF GERMANY
YAMAHA ELECTRONIQUE FRANCE S.A. RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCE
YAMAHA ELECTRONICS (UK) LTD. YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD1 7JS, ENGLAND
YAMAHA SCANDINAVIA A.B. J A WETTERGRENS GATA 1, BOX 30053, 400 43 VASTRA FRÖLUNDA, SWEDEN
YAMAHA MUSIC AUSTRALIA PTY, LTD. 17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA
Printed in Malaysia
VZ 79070-1
/