Yamaha | TX-77 | Owner's Manual | Yamaha TX-77 Owner's manual

Yamaha TX-77 Owner's manual
 Thank you for purchasing the YAMAHA TX- 77 AM/FM - stereo tuner.
CONTENTS | | | | Е В
CAUTION:READ THIS BEFORE OPERATING YOUR TX-77 . ........... 1/2
CONNECTION DIAGRAM LD 1111 11 4 11 1 4 4 LA 2 4 40 4 C0 4 4e 4 4e 14 ea 8
CONNECTIONS . ............ » .. a
FRONT PANEL PARTS AND FUNCTIONS L 1111111 14 1111 141142, 5/6
PRESETTING AND TUNING LL 111 4 1 4 4 4 4 A 4 a 4 4 4 1 Va 4 1 a 1 111 a 186
TROUBLESHOOTING 112211 11 14 LL 1 LL LL 1 A 4 A 4 A 4 A 4e 0 a a 7
SPECIFICATIONS LL 1114 1114 веке... 8
Please record the serial number of your unit in the space below,
Model: TX-77 | a |
Serial No.: |
The serial number is located on the rear of the cabinet.
Retain this Owner's Manual in a safe place for future reference,
WARNING | | |
To prevent fire or shock hazard, do not expose this appliance to rain or moisture,
CAUTION (PREPARED IN ACCORDANCE WITH UL STANDARD 1270)
1 Read Instructions — All the safety and operating
instructions should be read before the appliance is operated.
= Retain Instructions — The safety and operating
instructions should be retained for future reference.
= Heed Warnings — All warnings on the appliance and in
the operating instructions should be adhered to.
+ Follow Instructions — All operating and other instruc-
tions should be followed.
=, Water and Moisture — The appliance 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.
{J Carts and Stands — The appliance should be used only
with a cart or stand that is recommended by the manufac-
turer.
/ Wall or Ceiling Mounting — The appliance should be Ш
mounted to a wall or ceiling only as recommended by the
manufacturer.
- Ventilation — The appliance should be situated so that
its location or position does not interfere with its proper ~~
ventilation. For example, the appiiance should not be
situated on a bed, sofa, rug, or similar surface that may
block the ventilation openings; or placed in a built-in installa-
tion, such as a bookcase or cabinet that may impede the flow
of air through the ventilation openings.
9 Heat — The appliance should be situated away from
heat sources such as radiators, stoves, or other appliances
that produce heat.
1 u Power Sources — The appliance should be connect-
ed to a power supply only of the type described in the
operating instructions or as marked on the appliance.
1 I 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
appliance.
12
Cleaning — The appliance should be cleaned only
as recommended by the manufacturer.
13
Nonuse Periods — The power cord of the appliance
should be unplugged from the outlet when left unused for a
long period of time.
A A Object and Liquid Entry — Care should be taken
so that objects do not fall into and liquids not spilled into
the inside of the appliance.
15
Damage Requiring Service — The appliance should
be serviced by qualified service personnel when:
A.
The power-supply cord or the plug has been damaged;
ar
Objects have fallen, or liquid has been spilled into the
appliance; or
. The appliance has been exposed to rain; or
. The appliance does not appear to operate normally or
exhibits a marked change in performance; or
. The appliance has been dropped, or the cabinet damag-
ed.
A С Servicing — The user should not attempt to service
the appliance beyond those means described in the operat-
ing instructions. All other servicing should be referred to
qualified service personnel.
d / Power Lines — An outdoor antenna should be
located away from power lines.
1 E Outdoor antenna grounding — If an outside antenna
is connected to the tuner, be sure the antenna system is
grounded so as to provide some protection against voltage
surges and built up static charges. Section 810 of the
National Electrical Code, ANSI/NFPA No. 70 — 1981,
provides information with respect to proper grounding of
the mast and supporting structure, grounding of the lead-in
wire to an antenna discharge unit, size of grounding con-
ductors, location of antenna-discharge unit, connection to
grounding electrodes, and requirements for the grounding
electrode,
EXAMPLE OF ANTENNA GROUNDING
AS PER NATIONAL ELECTRICAL CODE
INSTRUCTIONS
Antenna
Lead-in Wire
To
Tuner or Receiver
Ground
Wire a,b
Antenna
Discharge
Unit c
Ground |
Wire ab
Ground
Clamps
Grounding
y Electrode Driven
581682 U 8' Into the Earth
(2.44 Meters)
a. Use No. 10 AWG (5.3 mm?) copper, No. 8 AWG
{8.4 mm?) aluminium, No. 17 AWG (1.0 mm?)
copper-clad steel or bronze wire, or larger, as ground
wire,
b. Secure antenna lead-in and ground wire to house with
stand-off insulators spaced from 4 feet (1.22 meters)
to 6 feet (1.83 meters) apart.
c. Mount antenna discharge unit as closely as possible to
where lead-in enters house.
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.
e Explanation of Graphical Symbols
persons.
panying the appliance.
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
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 accom-
1
The TX-77 is a sophisticated AM/FM sterec tuner. To
ensure proper operation for the best possible performance,
please read this manual carefully,
2
Choose the installation location of your TX-77 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 as this might result in damage to
the set, or electrical shock, If a foreign object should get
into the set, contact your dealer,
4
To prevent lightning damage, pull out the power cord and
remove the antenna cable in case of an electrical storm,
5
Do not use force when using the switches or knobs,
G
When moving the set be sure to first puli out the power
connector and remove cords connecting to other equipment.
7
Do not attempt to clean the TX-77 with chemical] solvents
as this might damage the finish, Use a clean, dry cloth,
8
Be sure to read the “troubleshooting” section for advice on
common operating errors before concluding that your TX-77
is faulty,
9
Keep this manual in a safe place for future reference.
FM outdoor antenna T-shape antenna
Direction of the
FM broadcasting
station
(for short distances)
300 € flat
twin-lead wire
Be sure to switch the power off when making connections.
7
In case reception is poor with the AM
loop antenna, stretch a 3 ~ 10 meter
vinyl covered wire outdoors.
The AM loop antenna
can be easily attached
and detached.
CAUTION
Do not place the unit near a TV or other receiver as
there will be mutual adverse influence causing poor
reception. -
This unit uses auto search tuning. Even though an FM
antenna and an AM lead antenna are used if the signals
are weak or the broadcasting station far away it may not
be possible to receive the station. In this case, check the
place where the antenna is set up, as well as the height,
once again, and also check that the tuning mode switch
is set to MAN"L/FM MONO.
Also, when tuning a nearby broadcasting station (weak
electrical field) if a multi-element antenna and booster
are used the signals may become teo strong, thus pre-
venting good reception.
Refer to the amp owner's manual when connect-
ing a stereo amp (power plug, output cord, and
control signal connection),
TX-77 rear panel
MTS NENAS Je Tr i MONTANO MUNLNO MAMAS GATO MEA NUMAN SAN TENES an
7
75 9
coaxial cable
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FCC 1D: ABRSLVTX-77
NIPPON GAKKI CO.,LTD.
MADE IN JAPAN
AUTO FUNCTION SETE
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—— UT AT
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IABSVXE sw BOHz
: APPLIANCE TO RAIN OR MOISTURE.
To the tuner
jack of the amp.
No ground is necessary
for normal reception
YAMAHA +7 ©
To power supply
outlet of amp
Refer to the amp owner's manual
when connecting the power cutput
and the control signal.
2 CONNECTING THE FM ANTENNA
To receive FM broadcasts clearly, it is ideal to position the
FM outdoor antenna is accordance with the strength of the
signal transmitted.
There are two kinds of connections for the FM antenna,
the 75 £2 coaxial cable and the 300 2 balanced feeder line.
Of these, the 75 Q coaxial cable (3C-2V and 5C-2V) is
more effective in reducing automobile and motorcycle
ignition noises and other outside noises.
75 © coaxial cable |
{In the case of 3C-2V) (In the case of 5C-2V)
Copper wire Copper wire
Quter covering Approx. 12mm
|
Quter covering Approx. 20mm
Insulated covering Insulated covering
{
Approx. Brmm
“Core wire
Approx. 9mm
Approx. 9mm
Attach in accordance with {1) ~ (4)
in the drawing below.
(2) Insert the corewire
through the hole
CAMA
MD
(1) Usea |
screwdriver
to loosen (4) Tighten and
fix in place with
a screwdriver
E TO CONNECT THE FM T-SHAPE ANTENNA
The T-shape antenna should be used in areas near broadcast-
ing stations where the signals are sufficiently strong.
Connect the antenna feeder line to the 300 N jack of the
rear panel; after pulling taut select the direction with the
best reception while looking at the signal level indicator and
then fix to the wall or other suitable location.
Î
ax
FM T-shape antenna
Find the position
with the best recep-
tion by changing the
direction and height
and then fix to
convenient place.
Do not place any
other cord near the
feeder line,
Signal level indicator
о ZU al 80
SIGNAL LEVEL El DN cd кз om pa
Find the position in
which the most num-
ber of indicators
light up.
TO CONNECT THE AM ANTENNA
AM loop antenna
Connect the AM loop antenna to the AM antenna jack
and while looking at the signa! indicator turn the loop
antenna to the left and right to find the direction with
the best reception.
The loop antenna can also be removed from the holder
and hung on the wall, or other place.
Can be removed from the tuner >=
and hung up on the wall,
Can also be removed from
the holder and used.
Directional
nature
Change the direction of
the loop antenna
2. AM Lead Antenna
If reception is still poor even after adjusting the loop
antenna connect a vinyl covered wire to the AM antenna
jack and extend outdoors 5 - 10 meters.
IN
—
HI STEREG =
ri ea
| |
—
a EG
cac
SIGNAL LEVEL
pa Fe
F3
РА PS
P7
4 POWER SWITCH
When this switch is pressed, the power will be turned on
and a lamp inside the switch will light up. When pressed
again the power will go off and the lamp will go out.
When the power is turned on, the station which was tuned
in before the power was turned off will be received. (Last
Channel Memory).
9 HINGED PANEL
When the hinged panel is closed the switches not normally
used will be out of sight, leaving a clean panel face. To open
the panel, lightly press the A at the top part of the panel.
-
pa
nm
Lightly press the A on the panel.
© TUNING MODE SWITCH
e Auto/FM Mute Position
When the tuning button is pushed, the tuner will tune in
that direction until a station is found, at which point it
will stop. Also, the muting circuit will activate and
noises arising from FM broadcasting stations will be
eliminated.
MAN"L/FM MONO Position
When the tuning button is pressed on and off at this
position the frequency will change in steps of 0.1 MHz
for FM and 9 kHz for AM. Distant stations and weak
stations cannot be received with AUTO and so must be
received with MAN'L (Manual).
In addition, at this position FM stereo broadcasts can
be received in mono.
E MEMORY BUTTON
When this button is pressed, the word "MEMORY" will
light up for 5 seconds inside the frequency indicator,
allowing you to preset a station.
Refer to the procedures for presetting stations on Page 6.
|
®
© TUNING BUTTON
When the DOWN side is pressed, the frequency shown on
the frequency indicator will decrease and when the UP side
is pressed it will increase. If the TUNING MODE switch is
set to AUTO tuning will automatically stop when a station
is tuned in (Auto Search Tuning).
® FREQUENCY INDICATOR
The frequency of the broadcast (FM or AM) tuned in is
shown digitally. ;
@ FM STEREO INDICATOR
Lights when an FM broadcast is in stereo. Will not light if
the Tuning Mode Switch is in the Mono mode.
ED SIGNAL LEVEL INDICATORS
When tuning in stations, tuning should be done so that as
many indicators as possible light up.
Also, when setting up the antenna, orient it so that as many
indicators as possible light up.
Signal level indication
D 20 40 50
El cama г
SIGNAL LEVEL
Indicates strength of the signal received
when deciding on the position of the FM
antenna and the AM antenna. A position
should be selected where the most indica-
tors will light up.
E BAND SELECTOR
Select either the FM band or the AM band. When FM is
pressed, the frequency indicator will show MHz and when
AM is pressed it will show kHz.
hs
i
@ PRESET INDICATORS
When a preset buttan is pressed the indicator corresponding
to that button will light up.
PRESET BUTTONS
Up to 7 FM stations and 7 AM stations, a total of 14
stations, can be preset and the preset stations can be
selected at a single touch (preset tuning).
# PROCEDURES FOR PRESETTING STATIONS
Example: presetting a station at 92,5 MHz with Preset
Button PT. |
1. Tune to FM with the band selector
2. Press the tuning button so the frequency indicator is at
92.5 MHz (Auto Search Tuning).
3, Press the Memory button and while the word
“MEMORY” is lit press preset button P1. (The word
“MEMORY” will go out and the indicator over the
preset button P1 will light up).
(2) Tune to 92,5 MHz with
the tuning button
Ci 77 MEMORY e —] oo
FM ALL! MHz | бер Л
pa Pa
(4)
(1) Press P1 white the word
“MEMORY” is lit.
4. To check the memory, press a different preset button
and then press button P1 again to see if "92.5 MHz" is
indicated.
When P1 is pressed (1)
again check to see Press a different
that 92.65 MHz is button (P2 ~ P7)
indicated.
® AM broadcasts can be preset in the same manner.
© Up to 7 FM stations and 7 AM stations can be pro-
grammed into the memory for preset tuning.
© To change the memory, use the same procedures as that
for initial presetting. The former memory will be erased
and the new stations memorized.
B TUNING
1. Select either FM or AM with the band selector.
2. By pressing a preset button (P1 — P7) the desired
station can be tuned in. The amp will automatically
switch to “TUNER”, so only the volume need be
adjusted.
* Alternatively, the tuning button can be used for Auto
Search Tuning or manual tuning.
= MAINTAINING THE MEMORY
So as not to erase the memory that has been preset there is
a built-in memory back-up circuit, so even though the
power may be cut off temporarily due to a power failure or
turning the power switch off, the memory wili not be
erased.
However, if left unused for a long period of time the
memory may become erased. In this case, the stations will
have to be reprogrammed.
Before assuming that your tuner is faulty, check the following troubleshooting list which details corrective action you can
take yourself without having to call a service engineer. If you have any doubts or questions, get in touch with your nearest
Yamaha dealer.
in weak signal areas).
Ignition noise from vehicles.
The FM antenna should be put up as high as possible,
away from the road, and a coaxial cable used.
Noise from thermostats or other electrical equipment.
Attach a noise suppressor to the equipment causing the
noise.
The FM stereo reception is noisy.
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,
Check the antenna connections.
(Try using a multiple element FM antenna.)
Set the Tuning Mode switch to the Mono position.
noises.
motors, thermostats and other electrical equipment,
The FM Stereo indicator flickers on and off and Insufficient antenna input. Use an antenna appropriate for the reception conditions
reception is noisy. in your area.
Not tuned correctly. Tune again.
There is distortion and clear reception can not There is multipath interference. Adjust antenna placement to eliminate multipath inter-
be obtained even with a good FM antenna. ference.
No stereo effect even with a stereo broadcast. The Tuning Mode switch is set to Mono. Set the Tuning Made switch properly.
The Signal Quality Indicator lights up but there The muting circuit has turned off the sound because Set the Tuning Mode switch to the Mono position ta dis-
is no sound. the received station is very weak. able muting.
Insufficient sensitivity. Weak signal! or loose antenna connections. Tighten the AM loop antenna connections and rotate it
for best reception.
Use an outdoor antenna.
| AM There are continuous crackling and hissing These noises result from lightning, fluorescent lamps, Use an outdoor antenna and a groundwire. This will helo
somewhat put it is difficult to eliminate all noise.
There are buzzing and whining noises {especially
in the evening).
Another station is interfering with the received station.
Change direction of loop antenna,
A television set is being used nearby.
Move the television a distance away.
e FM Section
Tuning Range ......... 87.9 ~ 107.9 MHz
50 dB Quieting Sensitivity
MONO ........... 3.1 uV {15.1 dBf)
STEREO ......... 42 uV (37.7 dBf)
Usable Sensitivity (MONO, 98 MHz, 30 dB Quieting)
758 LL. 0.8 pV (9.3 dBf)
300 2... . e... 1.6 и\ (9,3 dBf)
Image Response Ratio .... 40 dB
IF Response Ratio .. . . . . 100 dB
Spurious Response Ratio. . . 80 dB
AM Suppression Ratio
(IHF) 111102424200 55 dB
Capture Ratio |
(IHF MONO) ....... 1.5 dB
Alternate Channel Selectivity
(IHF) o.oo 85 dB
Signal-to-Noise Ratio (IHF)
MONO ........... 81 dB
STEREO ......... 76 dB
Harmonic Distortion
MONO {1 kHz) . . . . 0.1%
STEREO {1 kHz) . . . .. 0.2%
Stereo Separation {1 kHz) . . 40 dB
Frequency Response
(60 Hz ~ 10 kHz)
Sub-carrier Product Ratio . . 35 dB
Muting Threshald ...... 10 4V (25.2 dBf)
Meter Saturation Level . . . . 100 uV (47.5 dB)
e AM Section
Tuning Range . . . . . . ..
Usable Sensitivity (IHF) . . .
Selectivity . . . . . . .. ..
Signal-to-Noise Ratio
Image Response Ratio . . . .
Spurious Response Ratio
Harmonic Distortion
(400 Hz).........
® Audio Section
Output Level/Impedance
FM (100% Mod. 1 kHz). .
АМ (30% Mod. 400 Hz) .
e General
Power Supplies . . . . . . .
Power Consumption . . . .
Dimensions (W x H xD)...
Weight . . . .. . ... 2.0
Accessories .. .. .. ...
530 ~ 1,620 kHz
10 uV :
24 dB
50 dB
40 dB
50 dB
0.5%
500 mV/2 K-ohms
150 mY/2 K-ohms
AC 14.5 Y, 60 Hz
HW
340 x 67 x 272 mm
(13-3/8 x 2-5/8 x
10-11/16")
2 kg (4.4 bs)
AM loop antenna, FM
antenna, Sub-power plug,
3P connection plug.
* Specifications subject to change without notice.
SINCE 1887
NIPPON GAKK!I CO, LTD. HAMAMATSU, JAPAN
8212 Printed in Japan @
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