Yamaha TX-492 Manuale del proprietario
- Categoria
- Ricevitore
- Tipo
- Manuale del proprietario
Natural Sound AM/FM Stereo Tuner
Syntonisateur AM/FM stéréo de la série “Natural Sound”
TX-492
CONTENTS
Safety Instructions ...............Inside the Front Cover
Caution ............................................................2
Supplied Accessories ......................................3
Features ..........................................................3
Connections ....................................................4
Controls and Their Functions ..........................7
Tuning Operations ...........................................9
Preset Tuning ................................................10
Troubleshooting .............................................13
Specifications ................................................14
TABLES DES MATIERES
Accessoires fournis .......................................15
Caractéristiques ............................................15
Attention ........................................................16
Connexions ...................................................17
Les commandes et leurs fonctions.................20
Syntonisation .................................................22
Syntonisation préréglée ................................23
En cas de difficulté ........................................26
Caractéristiques techniques ..........................27
OWNER’S MANUAL
Thank you for selecting this YAMAHA stereo
tuner.
MODE D’EMPLOI
Nous vous remercions pour avoir porté votre
choix sur ce syntonisateur stéréo YAMAHA.
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 a 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 surface, that may block the
ventilation openings; or placed in a built-in installation,
such as a bookcase or cabinet that may impede the flow
of air through the ventilation openings.
9 Heat – The unit should be situated away from heat
sources such as radiators, stoves, or other appliances
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
particular attention to cords at plugs, convenience
receptacles, and the point where they exit from the unit.
12 Cleaning – The unit should be cleaned only as
recommended by the manufacturer.
13 Nonuse 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 are 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 Power Lines – An outdoor antenna should be located
away from power lines.
18 Grounding or Polarization – Precautions should be taken
so that the grounding or polarization is not defeated.
SAFETY INSTRUCTIONS
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.
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.
•
Explanation of Graphical Symbols
CAUTION
WARNING
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK, DO NOT EXPOSE THIS
UNIT TO RAIN OR MOISTURE.
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. Cable/s 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 the local retailer authorized to
distribute this type of product. If you can not 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.
1
English
Note to CATV system installer:
This reminder is provided to call the CATV system
installer’s attention to Article 820-40 of the NEC that
provides guidelines for proper grounding and, in
particular, specifies that the cable ground shall be
connected to the grounding system of the building, as
close to the point of cable entry as practical.
SPECIAL NOTES FOR FCC COMPOSITE
DEVICE (for US customers only)
This device is a composite system. The digital device
component may not cause harmful interference.
19 For US customers only:
Outdoor Antenna Grounding – If an outside antenna is
connected to this unit, be sure the antenna system is
grounded so as to provide some protection against
voltage surges and built-up static charges. Article 810 of
the National Electrical Code, ANSI/NFPA 70, provides
information with regard to proper grounding of the mast
and supporting structure, grounding of the lead-in wire to
an antenna discharge unit, size of grounding conductors,
location of antenna discharge unit, connection to
grounding electrodes, and requirements for the grounding
electrode.
EXAMPLE OF ANTENNA GROUNDING
MAST
GROUND
CLAMP
ANTENNA
LEAD IN
WIRE
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810–20)
GROUNDING CONDUCTORS
(NEC SECTION 810–21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250. PART H)
ELECTRIC
SERVICE
EQUIPMENT
NEC – NATIONAL ELECTRICAL CODE
FCC INFORMATION (for US customers only)
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 to avoid
prolonged exposure from excessive volume levels.
We Want You Listening For A Lifetime (for US customers only)
2
CAUTION: READ THIS BEFORE OPERATING YOUR UNIT.
1. This unit is a sophisticated stereo tuner. To assure proper
operation and the best possible performance, please read
this manual carefully.
2. Choose the installation location for the unit carefully.
Avoid placing it in direct sunlight or close to a source of
heat. Also avoid locations subject to vibration and
excessive dust, heat, cold or moisture. Keep it away from
such sources of hum as transformers or motors.
3. Do not open the cabinet, because this may result in
damage to the unit or electrical shock. If a foreign object
should get into the unit, contact your local dealer.
4. When not planning to use this unit for long periods of time
(ie., vacation, etc.), disconnect the AC power plug from the
wall outlet.
5. To prevent lightning damage, disconnect the AC power
plug and disconnect the antenna cable when there is an
electrical storm.
6. When disconnecting the power plug from the wall outlet,
always pull directly on the plug; never pull the cord itself.
7. Do not use force when operating switches and other
controls.
8. When moving the unit, be sure to first disconnect the
power plug and disconnect all wires connected from the
unit to other equipment.
9. Do not attempt to clean this unit with chemical solvents,
because this may damage the finish. Use a clean, dry
cloth.
10.Be sure to read the “TROUBLESHOOTING” section of this
manual for advice on common operating errors before
concluding that the 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 main voltage BEFORE plugging
into the AC main supply.
Voltages are 110-120/220-240V AC, 50/60 Hz.
FREQUENCY STEP switch (General Model only)
Because the interstation frequency spacing differs in
different areas, set the FREQUENCY STEP switch (located
at the rear) according to the frequency spacing in your area.
Before setting this switch, disconnect the AC power plug of
this unit from the AC outlet.
The apparatus is not disconnected from the AC power
source as long as it is connected to the wall outlet, even if
the apparatus itself is turned off.
IMPORTANT
Please record the serial number of this unit in the space
below.
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.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR
MOISTURE.
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.
3
English
Indoor FM Antenna
Audio connection cord
AM Loop Antenna
After unpacking, check that the following parts are contained.
•
40 Station Random Access Preset
Tuning
•
Automatic Preset Tuning
•
Multi-Status Station Memory
•
Direct PLL Synthesizer Tuning
•
Preset Station Shifting Capability
(Preset Editing)
SUPPLIED ACCESSORIES
FEATURES
4
Never plug in this unit and other components until all connections are completed.
ANTENNA CONNECTIONS
●
Each antenna should be connected to the designated terminals correctly, referring to the following figure.
●
Both AM and FM indoor antennas are included with this unit. In general, these antennas will probably provide sufficient signal
strength. Nevertheless, a properly installed outdoor antenna will give clearer reception than an indoor one. If you experience
poor reception quality, an outdoor antenna may result in improvement.
CONNECTIONS
Outdoor FM antenna
Outdoor AM antenna
AM loop
antenna
(included)
Ground
75-ohm
antenna
adapter
Indoor FM
antenna
(included)
75-ohm/300-ohm
antenna adapter
75-ohm
coaxial cable
300-ohm
feeder
75Ω UNBAL.
FM ANT GND AM ANT
5
English
m Optional outdoor FM antenna
Consult with your dealer or authorized service center about the
best method of selecting and erecting an outdoor FM antenna.
The choice of the feeder cable is also important. Flat ribbon-
shaped twin-lead cable performs well electrically, and is
cheaper and somewhat easier to handle when routing it
through windows and around rooms. Coaxial cable is more
expensive, does a much better job of minimizing interference,
is less prone to the effects of weather and close-by metal
objects, and is nearly as good a signal conductor as feeder
cable, particularly for foam-type coaxial cables. Coaxial cable
is somewhat more difficult to install at the point where the
cable enters the building. If coaxial cable is selected, make
sure the antenna is designed to be used with that type of
cable.
* Use a 75-ohm/300-ohm antenna adapter (not included) or a
75-ohm antenna adapter (not included) for connections.
300-ohm feeder cable 75-ohm coaxial cable
75-ohm/300-ohm antenna adapter
Notes for FM antenna installation
●
To minimize automobile ignition noise, locate the antenna
as far from heavy traffic as possible.
●
Keep the feeder cable or coaxial cable as short as possible.
Do not bundle or roll up excess cable.
●
The antenna should be at least two meters (6.6 feet) from
reinforced concrete walls or metal structures.
300-ohm feeder
cable
75-ohm coaxial
cable
75-ohm antenna
adapter
75-ohm coaxial
cable
Connecting the indoor FM antenna Connecting the AM loop antenna
* If you connect an outdoor FM antenna to this unit, do not connect the indoor FM antenna to this unit.
* The AM loop antenna should be placed apart from the main unit. The antenna may be hung on a wall.
* The AM loop antenna should be kept connected, even if an outdoor AM antenna is connected to this unit.
Orient so that the best
reception is obtained.
m Optional outdoor AM antenna
In steel buildings or at a great distance from the transmitter, it
may be necessary to install an outside long wire antenna.
GND terminal
For maximum safety and minimum interference, connect
the GND terminal to a good earth ground. A good earth
ground is a metal stake driven into moist earth.
1
3
2
1 2 3
6
CONNECTIONS TO THE AMPLIFIER
●
Before making any connections, switch OFF the power to
this unit and the amplifier or other component.
●
Be sure that the connections from the left (“L”) and right
(“R”) LINE OUT terminals are connected to the
corresponding (left and right) input terminals of the amplifier
or other component.
●
If you have a YAMAHA amplifier whose terminals on the
rear panel are numbered as 1, 2, 3, etc., connections can
be made easily by making sure to connect the LINE OUT
terminals of this unit to the input terminals of the amplifier
numbered 2.
NOTES ABOUT CONTROLLING THIS UNIT WITH THE REMOTE CONTROL
TRANSMITTER
This unit has a remote control sensor. It receives signals from
a remote control transmitter provided with a YAMAHA amplifier
or receiver.
Notes
●
There should be no large obstacles between the remote
control transmitter and the main unit.
●
If the remote control sensor is directly illuminated by strong
lighting (especially an inverter type of fluorescent lamp etc.),
it might cause the remote control transmitter not to work
correctly. In this case, reposition the main unit to avoid
direct lighting.
75Ω UNBAL.
FM ANT GND AM ANT
LINE OUT
RL
2
TUNER
L
R
l6
20
28
40
60
l2
8
4
2
0
–dB
Amplifier
Connection cord (included)
This unit
To AC outlet
30°
30°
Remote control
sensor
Within approximately
6 m (19.7 feet)
7
English
CONTROLS AND THEIR FUNCTIONS
FRONT PANEL
1 2
6
0789
3 4 5
NATURAL SOUND
AM/FM STEREO TUNER TX–492
POWER
A/B/C/D/E MEMORY EDIT FM/AM
TUNING MODE
MAN'L/AUTO FM AUTO/MAN'MONO
1
5
2
6
3
7
4
8
PRESET STATIONS
TUNING
DOWN UP
1 POWER switch
Press this switch to switch the power on. Press it again to
switch the power off.
2 Display panel
Shows station frequencies and various information. (Refer to
the next page for details.)
3 Remote control sensor
Receives signals from a remote control transmitter provided
with a YAMAHA amplifier or receiver.
4 PRESET STATIONS buttons
Select a preset station number (1 to 8).
5 TUNING DOWN and UP buttons
Used for tuning. Press the “UP” button to tune in to higher
frequencies, and press the “DOWN” button to tune in to lower
frequencies.
6 A/B/C/D/E button
Press this button to select a desired group (A–E) of preset
stations.
7 MEMORY (MAN’L/AUTO FM) button
When this button is pressed, the MEMO indicator flashes for
about 5 seconds. During this period, press the desired
PRESET STATIONS button to enter the displayed station into
the memory.
When this button is pressed and held for about 3 seconds, the
automatic preset tuning begins. (Refer to page 11 for details.)
8 EDIT button
This button is used to exchange the places of two preset
stations with each other.
9 FM/AM button
Press this button to switch the reception band to FM or AM.
0 TUNING MODE (AUTO/MAN’L MONO) button
Press this button to switch the tuning mode to automatic or
manual. To select the automatic tuning mode, press this
button so that “AUTO” lights up on the display. To select the
manual tuning mode, press this button so that “AUTO” goes
off.
8
DISPLAY PANEL
kHz
MHz
AUTO
ST
MEMO
EDIT
1
6
2 4 53
7
1 Preset station indicator
Display the group (A/B/C/D/E) and the number (1 to 8) of a
preset station.
2 Station frequency display
Displays the band and frequency or information from the
received station.
3 AUTO indicator
Lights up when this unit is in the automatic tuning mode.
4 ST (STEREO) indicator
Lights up when an FM stereo broadcast with sufficient signal
strength is received.
5 Signal-level meter
Indicates the signal level of the received station.
If multipath interference is detected, the indication decreases.
6 MEMO indicator
When the MEMORY button is pressed, this indicator flashes
for about 5 seconds. During this period, the displayed station
can be programmed to the memory by using the A/B/C/D/E
button and one of the PRESET STATIONS buttons.
7 EDIT indicator
Flashes by the first press of the EDIT button when you will
exchange preset stations, and lights up for a moment by the
second press of the EDIT button to show that the exchange
has succeeded.
9
English
1 Turn the power on.
2 Select the reception band (FM or AM) confirming
it on the display.
3
4 Tune to a desired station manually.
* To continue tuning search, press and hold the button.
1 Turn the power on.
2 Select the reception band (FM or AM) confirming it on
the display.
3
4
To tune to a higher frequency, press the UP button.
To tune to a lower frequency, press the DOWN button.
* If the station where tuning search stops is not the desired
one, press again.
* If the tuning search does not stop at the desired station
(because the signals of the station are weak), change to
the MANUAL TUNING method.
TUNING OPERATIONS
Normally, if station signals are strong and there is no interference, quick automatic-search tuning (AUTOMATIC TUNING) is
possible. However, if signals of the station you want to select are weak, you must tune to it manually (MANUAL TUNING).
Note
If you tune to an FM station manually, it is received in monaural
mode automatically to increase the signal quality.
AUTOMATIC TUNING MANUAL TUNING
FM
/
AM
TUNING MODE
AUTO/MAN'MONO
TUNING MODE
AUTO/MAN'MONO
POWER
POWER
TUNING
DOWN UP
TUNING
DOWN UP
Turn “AUTO” off.
or
FM
/
AM
or
AUTO
NATURAL SOUND
AM/FM STEREO TUNER TX–492
POWER
A/B/C/D/E MEMORY EDIT FM/AM
TUNING MODE
MAN'L/AUTO FM AUTO/MAN'MONO
1
5
2
6
3
7
4
8
PRESET STATIONS
TUNING
DOWN UP
1
432
10
1 Tune to a desired station.
(Refer to the previous page for tuning procedure.)
2 Select a desired group (A – E) of preset stations
confirming it on the display.
3
4 Select a preset station number where you want to
program the station before “MEMO” goes off from the
display.
* In the same way, program other stations to A2, A3 ... A8.
* You can program more stations to preset station numbers
on other groups in the same way by selecting other groups
in step 2.
11 Select the group of preset stations.
22 Select the preset station number.
Notes
• A new setting can be programmed in place of the former
one.
• For presets, the setting of the reception mode (stereo or
monaural) is stored along with the station frequency.
Memory back-up
The memory back-up circuit prevents the programmed data
from being lost even if the POWER switch is set off or the
power plug is disconnected from the AC outlet or the power is
cut due to temporary power failure. If, however, the power is
cut for more than one week, the memory may be erased. If
so, it can be re-programmed by simply following the PRESET
TUNING steps.
MANUAL PRESET TUNING
This unit can store station frequencies selected by tuning operation. With this function, you can recall any desired station by only
selecting the preset station number where it is stored. Up to 40 stations (8 stations x 5 groups) can be stored.
PRESET TUNING
To store stations
To recall a preset station
MAN’L
/
AUTO FM
MEMORY
MEMO
A
/
B
/
C
/
D
/
E
A
/
B
/
C
/
D
/
E
Flashes on and off
for about 5 seconds.
Shows the displayed station has been
programmed to A1.
MHz
AUTO
ST
1
5
2
6
3
7
4
8
PRESET STATIONS
1
5
2
6
3
7
4
8
PRESET STATIONS
NATURAL SOUND
AM/FM STEREO TUNER TX–492
POWER
A/B/C/D/E MEMORY EDIT FM/AM
TUNING MODE
MAN'L/AUTO FM AUTO/MAN'MONO
1
5
2
6
3
7
4
8
PRESET STATIONS
TUNING
DOWN UP
2, 11
4, 22
3
11
English
1
2
The automatic preset tuning begins from the frequency
currently displayed. Received stations are programmed to
A1, A2 ... A8 sequentially.
* If more than 8 stations are received, they are also
programmed to the preset station numbers on other groups
(B, C, D and E) in that order.
When the automatic preset tuning is finished
The display shows the frequency of the last preset station.
Check the contents and the number of preset stations by
following the procedure of the section “To recall a preset
station” on page 10.
To recall a preset station
Simply follow the procedure of the section “To recall a preset
station” on page 10.
A recalled station is shown by the frequency or station name on
the display.
Notes
●
You can replace a preset station by another FM or AM
station manually by simply following the procedure of the
section “To store stations” on page 10.
●
The automatic preset tuning search will be performed
through all frequencies until stations are stored up to E8. If
the number of received stations is not enough to be stored
up to E8, the search is finished automatically after searching
all frequencies.
●
With this function, only FM stations with sufficient signal
strength are stored automatically. If the station you want to
program is weak in signal strength, tune in to it with the
MANUAL TUNING method (in monaural) and program it by
following the procedure of the section “To store stations” on
page 10.
●
If no station is received by the automatic preset tuning
search, the search finishes after “NOTHING” flashes for
about 3 seconds on the display.
AUTOMATIC PRESET TUNING
You can also make use of an automatic preset tuning function for FM stations only. By this function, this unit performs automatic
tuning and stores FM stations with strong signals sequentially. Up to 40 stations are stored automatically in the same way as in the
manual preset tuning method on page 10.
To store stations
Press and hold for
about 3 seconds.
Flashes.
MAN’L
/
AUTO FM
MEMORY
MHz
AUTO
ST
MEMO
FM
/
AM
NATURAL SOUND
AM/FM STEREO TUNER TX–492
POWER
A/B/C/D/E MEMORY EDIT FM/AM
TUNING MODE
MAN'L/AUTO FM AUTO/MAN'MONO
1
5
2
6
3
7
4
8
PRESET STATIONS
TUNING
DOWN UP
2 1
12
EXCHANGING PRESET STATIONS
You can exchange the places of two preset stations with each other as shown below.
Example)
If you want to shift the preset station on E1 to A5, and vice
versa.
1 Recall the preset station on E1 (by following the method
of “To recall a preset station” on page 10).
2
3 Next, recall the preset station on A5 by following the
same method with step 1.
4
Shows the exchange of stations is completed.
Flashes.
Flashes.
Lights up for a moment.
EDIT
MHz
ST
EDIT
MHz
ST
EDIT
EDIT
EDIT
NATURAL SOUND
AM/FM STEREO TUNER TX–492
POWER
A/B/C/D/E MEMORY EDIT FM/AM
TUNING MODE
MAN'L/AUTO FM AUTO/MAN'MONO
1
5
2
6
3
7
4
8
PRESET STATIONS
TUNING
DOWN UP
2, 4
FM
13
English
TROUBLESHOOTING
If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple
measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and
contact your authorized YAMAHA dealer or service center for help.
SYMPTOM
Crackling sounds from time to time
(especially in weak signal areas).
FM stereo reception is noisy.
The ST indicator flickers and reception is
noisy.
There is distortion and clear reception
cannot be obtained even with a good FM
antenna.
No stereo effect even with a stereo
broadcast.
A desired station cannot be tuned in with
Automatic tuning.
Previously preset stations can no longer
be tuned in.
Insufficient sensitivity.
A desired station cannot be tuned in with
Automatic tuning.
There are continuous crackling and
hissing noises.
There are buzzing and whining noises
(especially in the evening).
CAUSE
Ignition noise from passing vehicles.
Noise from thermostats or other electrical
equipment.
Because of the characteristics of FM stereo
broadcasts, this is limited to cases where
the transmitter is far away or the antenna
input is poor.
Insufficient antenna input.
Not tuned correctly.
There is multipath interference.
The TUNING MODE button is set to the
manual tuning mode.
The station is too weak.
The tuner has been unplugged for a long
period.
Weak signal or loose antenna connections.
These noises result from lightning,
fluorescent lamps, motors, thermostats and
other electrical equipment.
Another station is interfering with the
received station.
A television set is being used nearby.
REMEDY
The FM antenna should be put up as high
as possible, away from the road, and a
coaxial cable used.
Attach a noise suppressor to the equipment
causing the noise.
Check the antenna connections.
Try using a high quality directional FM
antenna.
Set the TUNING MODE button to the
manual tuning mode.
Use an antenna appropriate for the
reception condition in your area.
Tune again.
Adjust antenna placement to eliminate multi-
path interference.
Set the button so that “AUTO” lights up on
the display.
Use the manual tuning mode.
Use a high quality directional FM antenna.
Repeat the presetting procedure.
Tighten the AM loop antenna connections
and rotate it for best reception.
Use the manual tuning mode.
Use an outdoor antenna and a ground wire.
This will help somewhat but it is difficult to
eliminate all noises.
This is impossible to remedy.
Relocate this unit away from the TV.
AM
14
SPECIFICATIONS
FM SECTION
Tuning Range
[U.S.A. and Canada models]...................87.5 to 107.9 MHz
[Australia model].........................................87.5 to 108 MHz
50 dB Quieting Sensitivity (IHF)
75 ohms Mono ........................................1.55 µV (15.1 dBf)
75 ohms Stereo ..........................................21 µV (37.7 dBf)
Image Response Ratio
[U.S.A. and Canada models].......................................40 dB
[Australia model]..........................................................80 dB
IF Response Ratio.............................................................70 dB
Spurious Response Ratio
[U.S.A. and Canada models].......................................60 dB
[Australia model]..........................................................70 dB
Alternate Channel Selectivity
[U.S.A. and Canada models only]................................85 dB
Selectivity (two signals, 40 kHz Dev., ±300 kHz)
[Australia model only] ..................................................70 dB
Signal-to-Noise Ratio
[U.S.A. and Canada models] (IHF)
Mono..........................................................................82 dB
Stereo........................................................................76 dB
[Australia model] (DIN-Weighted)
Mono .........................................................................75 dB
Stereo ......................................................................70 dB
Harmonic Distortion (1 kHz)
Mono ............................................................................0.1%
Stereo .........................................................................0.2%
Stereo Separation (1 kHz).................................................50 dB
Frequency Response
30 Hz to 13 kHz....................................................0±0.5 dB
AM SECTION
Tuning Range
[U.S.A. and Canada models] ........................530 to 1,710 kHz
[Australia model]...........................................531 to 1,611 kHz
Usable Sensitivity........................................................200 µV/m
Selectivity ..........................................................................32 dB
Signal-to-Noise Ratio.........................................................50 dB
Image Response Ratio......................................................40 dB
Spurious Response Ratio..................................................50 dB
Harmonic Distortion; 1 kHz.................................................0.3%
AUDIO SECTION
Output Level/Impedance (Fixed)
FM (100 % mod. 1 kHz).........................900 mV/2.2 k-ohms
AM (30% mod. 1 kHz)............................150 mV/2.2 k-ohms
GENERAL
Power Supply
[U.S.A. and Canada models]..........................AC 120V, 60 Hz
[Australia model].............................................AC 240V, 50 Hz
Power Consumption..............................................................7W
Dimensions (W x H x D)...............................435 x 86 x 278 mm
(17-1/8” x 3-3/8” x 10-15/16”)
Weight..........................................................3.2 kg (7 lbs. 1 oz.)
Accessories.............................................Audio connection cord
AM loop antenna
Indoor FM antenna
* Specifications subject to change without notice.
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 VÄSTRA FRÖLUNDA, SWEDEN
YAMAHA MUSIC AUSTRALIA PTY, LTD. 17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA
VY76600 Printed in Malaysia
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Yamaha TX-492 Manuale del proprietario
- Categoria
- Ricevitore
- Tipo
- Manuale del proprietario
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