Technics-ST-Z-450-L-Owners-Manual

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Technics-ST-Z-450-L-Owners-Manual | Manualzz
 Technics
Quartz Synthesizer
FM/AM Stereo Tuner
=> 1-Z450
Quartz Synthesizer
FM/MW/LW Stereo Tuner
> 1-Z450L
OPERATING INSTRUCTIONS
(ST-Z450)
(ST-Z450L)
eCabinet colour differs according to area.
Before operating this unit, please read these instructions completely.
We want to thank you for selecting this product and
to welcome you to the growing family of satisfied
Technics product owners around the world.
We feel certain you will get maximum enjoyment
e ACCESSORIES .......... iL. 2
eBEFORE USING THIS UNIT .................... 2
MAINTENANCE OF EXTERNAL SURFACES ...... 2
eFOR SAFE USE OF THIS UNIT .................. 3
eCONNECTIÓONS..................eorcrerccracao: 4
e “MOST-RECENT” MEMORY AND
“BACK-UP” MEMORY.......... EE ESE Wei EG 9
eTO PREVENT ERASING THE MEMORY .......... >
eFRONT PANEL CONTROLS AND
THEIR FUNCTIONS го 400 607 454 sracs eva RE EEE BE 6
eHOW TO PRESET RADIO BROADCAST
FREQUENCIES ......... viii vin aan anaes ven wi 6 8
eLISTENING TO RADIO BROADCASTS .......... 10
eTECHNICAL SPECIFICATIONS... ............... 11
TROUBLESHOOTING GUIDE
e FM indoor antenna............ —..—.—_—_—_e_c_eceececerereoo, A
O AMIOOD ENtONAA <= 5 00 cuca E RNE Ue Els atar 1
e AM antenna holders ..............ec_eeesceccoorrereoen 2
OSCrOWS : : secu A Ese EN dE a de AAA 2
e Stereo connection cable .................... 5... 555... 1
e AC power supply cord ............._eeeeo.ecesereorereo 1
from this new addition to your home.
Please read these operating instructions carefully,
and be sure to keep them handy for convenient
reference.
Be sure to disconnect the mains cord before adjusting the
voltage selector.
Use a minus (—) screwdriver to set the voltage selector (on the
rear panel) to the voltage setting for the area in which the unit will
be used.
(If the power supply in your area is 117 V or 120 V, set to the
“127 V" position.)
Note that this unit will be seriously damaged if this setting is not
made correctly. (There is no voltage selector for some countries;
the correct voltage is already set.)
To clean, use a soft dry cloth.
If the surfaces are extremely dirty, use a soft cloth, dipped into a
soap and water solution or a weak detergent solution.
Wring the cloth well before wiping the unit.
Wipe once again with a soft dry cloth.
Never use alcohol, paint thinner, benzine, nor a chemically
treated cloth to clean this unit.
Such chemicals may damage the finish of your unit.
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7
E Use a standard electrical AC wall outlet Ш If water is spilled on the unit
1. Use from an AC power source of high voltage, such as Be extremely careful if water is spilled on the unit, because a fire
for air conditioners, is very dangerous. or serious electric shock might occur. Immediately disconnect
Be extremely careful not to make a connection to the
electrical outlet for a large air conditioner or central-heating - N
unit which uses high voltage, because there is the possibility
of fire.
2. ADC power source cannot be used.
Be sure to check the power source carefully, especially on a
ship or other place where DC is used.
E )
E Place the unit where it will be well ventilated,
and away from direct sunlight
Place this unit at least 10 cm (4) away from wall surfaces, etc.,
< > and away from direct sunlight.
E Connection and removal of the power cord =
plug
1. Wet hands are dangerous.
A dangerous electric shock may result if the plug is touched
by wet hands.
2. Don't pull the power cord.
Always grasp the plug; never pull the cord itself.
E Keep the unit away from heaters, etc.
É 17 Heat can damage the external surfaces as well as internal
A circuits and components.
Y
ISS =" E а!
Xx Е TE 7 Sa >
| т 03
N "
H Never attempt to repair or reconstruct this <a |
unit L
A serious electric shock might occur if this unit is repaired,
disassembled or reconstructed by unauthorized persons, or if ‚ x
the internal parts are accidently touched. E Avoid spray-type insecticides
Insecticides might cause cracks or ‘’cloudiness” in the cabinet
and plastic parts of this unit. The gas used in such sprays might,
moreover, be ignited suddenly.
У
E For families with children
Never permit children to put anything, especially metal, inside —— J
this unit. A serious electric shock or malfunction could occur if
articles such as coins, needles, screwdrivers, etc. are inserted
through the ventilation holes, etc. of this unit. E Never use alcohol or paint thinner
== N These and similar chemicals should never be used, because
they may damage the finish.
E Turn off after use
If the unit is left for a long time with the power on, this will not only
shorten its useful operation life, but may also cause other
unexpected trouble.
\
H If trouble occurs
If, during operation, the sound is interrupted or indicators no
longer illuminate, or if abnormal odor or smoke is detected,
immediately disconnect the power cord plug, and contact your
1 dealer or an Authorized Service Center.
FM outdoor antenna (option)
(Necessary in mountainous regions,
inside reinforced-concrete buildings,
etc.)
"al Important!
| | If this antenna is not installed, AM
“|| Adaptor (option)
75-ohm coaxial cable
(option) (L
AM loop antenna | |
broadcasts will not be received.
FM indoor antenna (included) A
e Attach to a wall (using tack or tape) Tack
facing in direction of best reception. or tape
e Tack should not contact internal
antenna wire.
e For best reception sound quality, an FM
or outdoor antenna is recommended.
e Disconnect this antenna if an FM outdoor
antenna is installed.
Technics
MODEL No. ST-Z450
FM/AM STEREO TUN
CAUTION: TO PREVENT ELECTRIC SH8cK,
=] DO NOT REMOVE SCREWS.
NO USER — SERVICEABLE PARTS INSIDE.
4 REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
Mir dby Matsushita Electric industnal Co.. Ltd
Made m Japan
„— If FM antenna terminal is as shown below: ) >
Connection:
= (1) Remove outer 2 Turn shield
75-ohm coaxial cable or covering braid back.
(option) _
—= Y == >»
20 mm 10 mm
| (25/32") (3/8") Clamp
Be sure the shield braid contacts Shield braid —
| the clamp. Center conductor — |
N
Installation of the AM (MW/LW) loop antenna
Pay attention to the following points when attaching the
antenna.
1) Do not attach it horizontally (to do so would impair
reception).
2) Do not attach it close to metal surfaces (to do so would
result in noise).
3)
4)
Do not attach it close to power cords, speaker wires, etc.
(to do so would result in noise).
Do not attach it close to a tape deck (when the tape deck
is being used, chirping or beeping sounds may be
received).
/ When attaching the antenna to a wall, -
column or rack
is best and then fix it vertically to the wall, rack, etc.
AM loop antenna (included) AM antenna
holder (A)
(included)
IS Y Rear panel
|! > of the rack
AM antenna holder (A) x
(included) | |
Column:
N
Find the height and direction of the antenna where reception
a ue
When attaching the antenna to the unit \
This type of installation may cause impaired reception or
result in signal noise. If possible, attach the antenna to the
rack, a wall, or a column.
Move the antenna toward the right or left to find the point
of best reception.
AM antenna holder (B) (included)
Rear panel
of the tuner
5~12m
(16~40 ft.)
AM (MW/LW) outdoor antenna
(option)
+,
(Necessary in mountainous regions,
inside reinforced-concrete buildings,
etc.)
Use5— 12m(16 — 40ft.) of vinyl-
covered wire horizontally at the
window.
(=)
— Vinyl-covered wire (option)
OUTPUT —— CONTROL
o INPUT
A UE
AM ANT
Control input terminal
(CONTROL INPUT):
(R)(L)
This terminal is used for the connection
of a timer for the purpose of controlling
the tuner by means of an external
control signal.
Stereo connection cable (included)
AM (MW/LW) loop antenna (included)
After finding the best reception position
for the antenna, fix it to a wall, the rack,
unit, etc.
Be sure to connect the AM loop antenna
even when an outdoor antenna is used.
Household
AC outlet
<a)
AC power supply cord (included)
(L) To tuner input terminals
(R) of the amplifier
“MOST-RECENT” MEMC
; \ND “В ACK-UI р” MEMORY
In addition to the preset memory function, this tuner also
features a “most-recent” memory function and a ' back-up
memory function.
“Most-recent” memory
The most-recent memory is a system by which the unit
“remembers” the FM or AM (MW/LW) broadcast station last
heard when any of the functions of this unit are turned off, and
automatically tunes to that station the next time the power is
turned on.
“Back-up” memory
This is the function which preserves the preset memory and
most-recent memory functions. In the event of a power failure, or
if the power cord of the tuner is disconnected from the electric
outlet, the back-up memory will preserve the preset memory and
most-recent memory functions for as long as approximately one
week.
If the power supply is interrupted for one week or longer, the
memory settings will be erased.
For example:
1) If the power cord is disconnected from the electric outlet,
2) If an audio timer is used and the timer does not operate the
tuner for a week or longer,
3) If a power failure occurs, etc.
If any of the above occurs, the memory will have to be reset.
The memory in this unit is maintained by a gold capacitor. If the
power supply is interrupted for a week or longer, set the power
switch of the tuner to the “on” position for thirty minutes or more
in order to recharge the gold capacitor.
O Power “stand by ¿ , on” switch
O FM stereo indicator
€) Memory indicator
® Quartz-lock indicator —
© Digital frequency display
Ш TH == РЕНО El Sa a CEA ET TET pre TT ee —- -
© Tuning buttons
@ Memory button
© Preset-tuning buttons
3 Channel display (1 — 16)
© FM mode selector
© Band selectors
® Signal-strength indicators
© Power “stand by ¢ , on” switch
O FM stereo indicator
€) Memory indicator
|
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Chuaarz Synthesrer FM/MW/LW Stereo Tuner ST-Z450L
® Quartz-lock indicator —
© Digital frequency display
ЕСИ letters À Eee ne
© Tuning buttons
@ Memory button
© Preset-tuning buttons
© Channel display (1 — 16)
|
|
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© FM mode selector
{) Band selectors
O) Signal-strength indicators
© Power ‘stand by © , on” switch
This switch turns on and off the secondary circuit power only.
The unit is in the “stand-by” condition when this switch is set
to the “stand by 4 ' position. Regardless of the switch
setting, the primary circuit is always “live” as long as the
power cord is connected to an electrical outlet.
© FM stereo indicator (stereo)
This indicator automatically illuminates when an FM stereo
broadcast is being received.
Note:
It will not illuminate if the FM mode selector is set to the
“mono” position.
© Memory indicator (memo)
This indicator illuminates when the memory button is
pressed.
To preset the memory manually, press the desired preset
tuning button while this indicator is illuminated (within
approximately 4 seconds).
If the memory is preset automatically, the indicator will not
illuminate.
© Digital frequency display
The reception frequency of the FM or AM broadcast selected
by using the tuning buttons or the preset tuning buttons is
indicated by a digital-type display.
© Channel display
The channel number selected by the preset-tuning buttons is
displayed.
OQ Tuning buttons (tuning)
If the button is pressed momentarily and then released, the
frequency will change at intervals of 0.05 MHz for FM and 9
kHz (or 10 kHz) for AM. If the button is pressed slightly longer
and then released, the station will be selected automatically.
If the broadcast signals are weak, it may not be possible to
make automatic selection. If this occurs, make the selection
manually.
@ Memory button (memory)
This button is used when preset memory setting of the
preset-tuning buttons is made.
Note:
Refer to page 8 for information concerning preset tuning.
© Preset-tuning buttons (1—16)
(16 channel random preset tuning)
These buttons are used to preset FM and AM broadcast
frequencies into the memory of this unit, and are also pressed
to select the desired preset frequencies.
Note:
Refer to page 8 for information concerning preset memory.
© FM mode selector (FM mode)
This unit automatically switches into the stereo mode when a
stereo broadcast is received. Press this button to listen in the
monaural mode. The stereo indicator will not illuminate in the
monaural mode.
(D Band selectors (band) (For ST-Z450)
FM:
Press this button to listen to an FM broadcast.
AM:
Press this button to listen to an AM broadcast.
This button is also used to select a frequency step of either 9
kHz or 10 kHz.
Press this button for approximately 4 seconds to select the
desired frequency step.
({) Band selectors (band) (For ST-Z450L)
FM:
Press this button to listen to an FM broadcast.
MW:
Press this button to listen to an MW broadcast.
This button is also used to select a frequency step of either 9
kHz or 10 kHz.
Press this button for approximately 4 seconds to select the
desired frequency step.
LW:
Press this button to listen to an LW broadcast.
This button is also used to shift the reception frequency of the
unit in accordance with the transmission frequency of the
broadcasting station.
When this button is pressed slightly longer, the reception
frequency decreases by 0.002 MHz (2 kHz).
So, for example, to receive 153 kHz, tune to 155 kHz, and
then press this button.
In order to return to the original frequency indication, press
this button again slightly longer.
O Signal-strength indicators (signal)
These indicators show the relative strength of broadcast
signals being received by the antenna. The best condition for
reception, for FM and AM, is when the indicators illuminate
completely to the top.
@ Quartz-lock indicator (quartz lock)
This indicator illuminates when tuned precisely to an FM or
AM station.
This unit is used to preset as many as 16 radio broadcast
frequencies: FM/AM random presetting. After broadcast fre-
quencies have been preset as described below, any desired
station can be quickly and easily selected by simply touching one
button.
Automatic memory presetting
Important!
Г y
AM loop antenna
E Memory presetting
There are two types of memory presetting: automatic and
manual. Select whichever is preferred.
If this antenna is not properly
installed, AM broadcasts will not be
received.
Y
and 9 through 16 for AM, respectively.
The FM broadcasting stations and AM broadcasting stations will be automatically preset to “channels” 1 through 16 for FM
O Press the ‘FM’ or ‘AM’ button.
© ‘on’ (И — =)
For AM broadcasts:
If the frequency step for your locality is 10 kHz step, press the
“AM” button for approximately 4 seconds.
©) set to the minimum frequency.
eFM: 87.50 MHz
e AM: 522 kHz (9 kHz step) or 530 kHz (10 kHz step)
mag of 1 NEE
ST-Z450
O Press. When the frequency indica-
tion begins to change, release.
DA
(The frequency will change upward, and the
automatic presetting will begin with the
broadcasting station of the lowest frequency
and will continue in order.)
For steps © and @ above, follow the order described below.
@ Press the “FM, “MW” or “LW” button.
For MW broadcasts:
If the frequency step for your locality is 10 kHz step, press the
“MW” button for approximately 4 seconds.
For LW broadcasts:
To receive the broadcasts of —2 kHz shifts, press the "LW"
button slightly longer.
OQ Confirm the names (call signs, etc.) of the broadcasting
stations which are preset to each channel, and enter them on
the file sheet (page 10).
To check the front channels (CH 1— 8):
Press The frequency stored in the
momentarily. memory and channel number are
т displayed.
[Cu => a 8 Uma |
To check the back channels (CH9—16):
Press slightly The frequency stored in the
longer. memory and channel number are
su displayed.
Re с TU ma]
| AM
The FM broadcasting stations, MW broadcasting stations, and LW broadcasting stations will be automatically preset in
“channels” 1 through 16 for FM, 9 through 16 for MW,
and 13 through 16 for LW, respectively.
© Set to the minimum frequency.
eFM: 87.50 MHz
eMW: 522 kHz (9 kHz step) or 530 kHz (10 kHz step)
eLW: 155 kHz or 153 kHz
ST-Z450L
Notes:
1. For automatic presetting in areas where there are less than
16 FM stations, the remaining channels (through channel 16)
will be left empty. The empty channels can be filled by using
manual memory presetting.
2. If a new broadcasting station is preset into a channel, the
broadcasting station which was previously entered in that
channel will be automatically erased.
Note that in mountainous or remote areas, broadcasting
stations which have weak broadcasting signals cannot be
automatically preset into the memory.
Manual memory presetting
Stations can be freely preset to any desired channel.
s Oo” (Bm)
#3 Press the “FM” or “AM” button.—— ~
For AM broadcasts:
If the frequency step for your locality is 10 kHz step,
press the "AM" button for approximately 4 seconds.
Memory indicator
©) Press the appropriate tuning button to
tune to the desired broadcast.
e Automatic tuning
Press the button. When the frequency indication begins to
change, release the button (a broadcasting station will be
selected automatically). Repeat this operation until the
desired station is found.
e Manual tuning
Press the button momentarily and tune to the desired
station. The frequency will change each time the button is
pressed.
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O Press momentarily, and then release.
(The memory indicator will illuminate for
approximately 4 seconds.)
Ci
If the button is pressed continuously, the frequen-
cy will begin to change, and the memory will be
preset automatically.
To stop the automatic memory presetting, once
again press either the ‘up’ button or the "down"
button.
(Enter the name (call sign, etc.) of the preset
broadcasting station on the station memory file
sheet (page 10).
This completes the procedures for presetting radio broadcast
frequencies. The other preset-tuning buttons can be preset in
the same way by following steps @ through ©.
Stations can be freely preset to any desired channel.
For FD o amena follow the order described below.
OQ While the memory indicator is ¡llumi-
nated, press the button of the desired
channel.
When the button is pressed, the memory indicator
illumination will stop, and the presetting is complete.
e To preset channels 1 through 8:
= Press the button momentarily, and then release.
[7 (The frequency stored in the memory and
channel number are displayed.)
eTo preset channels 9 through 16:
* Press the button slightly longer, and then
* release.
(The frequency stored in the memory and
channel number are displayed.)
@ Press the “FM, “MW” or “LW” button.
For MW broadcasts:
If the frequency step for your locality is 10 kHz step, press the
“MW” button for approximately 4 seconds.
For LW broadcasts:
To receive broadcasts of —2 kHz shifts, press the “LW”
button slightly longer.
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Important: -
If this antenna is not properly
C | installed, AM broadcasts will not
AM loop antenna be Foie, )
Have you completed the memory presetting (page 8) ?
E Turn the amplifier on, and prepare it © Press the “FM” or “AM” button.
for listening to radio broadcasts. For AM broadcasts: ‚
Note: If the frequency step for your locality is 10 kHz, press the “AM
If there is a noise during listening to an FM button for approximately 4 seconds.
broadcast, turn off the power of the
turntable. D Station selection by using the tuning buttons:
na?” Tune to the desired station by pressing one of the tunin
e on’ (>=) buttons. -
Station selection by using preset-tuning
buttons:
Tune to the desired station by pressing the corres-
ponding preset-tuning button.
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Casar Synihesger FM/AM Stereo Tuner ST-Z450
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If the broadcast signal is weak, or if there is a
large amount of interference in a stereo
broadcast, set to the mono position.
Note that the FM stereo indicator will not
illuminate in this position.
For step @ above, follow the order described below.
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5 Press the “FM, “MW” or “LW” button.
For MW broadcasts:
If the frequency step for your locality is 10 kHz step, press the
“MW” button for approximately 4 seconds.
For LW broadcasts:
To receive broadcasts of —2 kHz shifts, press the “LW”
button slightly longer.
- - = cm a _
— CH. 1 | CH.2 | CH.3 | CH.4 CH. 5 CH. 6 CH. 7 CH. 8
Station | EZ | EZ AA ШЕЕ ЕЕ
FM
AM (MW/LW)
CH. 9 CH. 10 CH. 11 CH. 12 CH. 13 CH. 14 CH. 15 | CH. 16
Station | | |
FM
| | |
AM (MW/LW)
=10 =
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(DIN 45 500)
ME FM TUNER SECTION
Frequency range 87.50 -108.00 MHz
Sensitivity 0.95 uV (IHF, usable)
S/N 30 dB 1.0 uV (750)
S/N 26 dB 0.9 uV (750)
S/N 20 dB 0.8 uV (750)
IHF 46 dB stereo quieting sensitivity 22 uV (750)
Total harmonic distortion
MONO 0.15%
STEREO 0.3%
S/N
MONO 70 dB (78 dB, IHF)
STEREO 65 dB (70 dB, IHF)
Frequency response 20 Hz~15 kHz, +0.5 dB~ —1.5 dB
Alternate channel selectivity (+400 kHz) 65 dB
Capture ratio 1.0dB
Image rejection at 98 MHz 55 dB
IF rejection at 98 MHz 90 dB
Spurious response rejection at 98 MHz 80 dB
AM suppression 55 dB
Stereo separation
1 kHz 40 dB
10 kHz 30 dB
Carrier leak
19 kHz —30 dB (—35 dB, IHF)
38 kHz —45 dB (—50 dB, IHF)
Channel balance (250 Hz~6,300 Hz) +1.0 dB
Limiting point 1.2 uV
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminals 75Q (unbalanced)
HB AM TUNER SECTION
Frequency range
9522 kHz~1611 kHz (9 kHz-step)
530 kHz~1620 kHz (10 kHz-step)
Sensitivity (S/N 20 dB) 20 uV, 300 4V/m
Selectivity (+9 kHz) 55 dB
Image rejection at 999 kHz 40 dB
IF rejection at 999 kHz 60 dB
HB GENERAL
Output voltage 0.3V (0.6V, IHF)
Power consumption 9W
Power supply
For Australia AC 50 Hz/60 Hz, 240V
For continental Europe AC 50 Hz/60 Hz, 220V
For others AC 50 Hz/60 Hz, 110V/127V/220V/240V
Dimensions (WXHXD) 430 x 53 x 200 mm
(16-15/16" x 2-3/32" x 7-28/32")
1.8 kg
(4 1b.)
Weight
—11—
(DIN 45 500)
E FM TUNER SECTION
Frequency range 87.50~108.00 MHz
Sensitivity 0.95 uV (IHF, usable)
S/N 30 dB 1.0 uV (750)
S/N 26 dB 0.9 uV (750)
S/N 20 dB 0.8 uV (750)
IHF 46 dB stereo quieting sensitivity 22 uN (75)
Total harmonic distortion
MONO 0.15%
STEREO 0.3%
S/N
MONO 70 dB (78 dB, IHF)
STEREO 65 dB (70 dB, IHF)
Frequency response 20 Hz~15 kHz, +0.5 dB~ —1.5 dB
Alternate channel selectivity (+400 kHz) 65 dB
Capture ratio 1.0 dB
Image rejection at 98 MHz 55 dB
IF rejection at 98 MHz 90 dB
Spurious response rejection at 98 MHz 80 dB
AM suppression 55 dB
Stereo separation
1 kHz 40 dB
10 kHz 30 dB
Carrier leak
19 kHz —30 dB (-35 dB, IHF)
38 kHz —45 dB (—50 dB, IHF)
Channel balance (250 Hz~6,300 Hz) +1.0 dB
Limiting point 1.2 NV
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminals 750 (unbalanced)
E AM TUNER SECTION
Frequency range
MW 522 kHz-1611 kHz (9 kHz-step)
530 kHz~1620 kHz (10 kHz-step)
LW 155 kHz~353 kHz (9 kHz-step)
153 kHz~351 kHz (—2 kHz shift)
Sensitivity (S/N 20 dB)
MW 20 uV, 300 uV/m
LW 100 uV
Selectivity (+9 kHz)
MW (at 999 kHz) 55 dB
LW (at 254 kHz) 55 dB
Image rejection
MW (at 999 kHz) 40 dB
LW (at 254 kHz) 40 dB
IF rejection
MW (at 999 kHz) 60 dB
60 dB
LW (at 254 kHz)
E GENERAL
Output voltage 0.3V (0.6V, IHF)
Power consumption 9W
Power supply AC 50 Hz/60 Hz, 220V
Dimensions (WXHXD) 430 x 53 X 200 mm
(16-15/16" x 2-3/32" xX 7-28/32")
1.8 kg
(4 16.)
Weight
Before requesting service for this unit, check this table to deter-
mine if the problem can be solved as described below. If the
problem still persists after making these checks, or if there are
symptoms of malfunction not described in this table, it is recom-
While listening to FM broadcasts
| Problem
An unusual hissing
noise is heard when
listening to the broad-
cast in stereo, but not
heard when listening
monaurally.
Probable cause(s)
A slight noise may be heard because the
method used for modulation of FM stereo
broadcasts is different than that used for
monaural broadcasts.
mended that you consult the store where this unit was purchased
or your local Service Center (see list included) for further infor-
mation and assistance.
Suggested remedy
e Try reducing the treble sound by using the treble
control of the amplifier.
e Set the FM mode selector to the mono position.
(Note that the broadcast will then be heard as
monaural sound.)
e Try changing the location, height and/or direction of
the antenna.
elf an interior antenna is being used, change to an
exterior antenna.
e Try using an antenna with more elements.
The FM stereo indicator
or quartz lock indicator
flickers, without com-
pletely illuminating.
Poor location and/or direction of the antenna.
Transmitting station is too far away.
Sound is distorted and/
or the volume level
becomes low.
Broadcast signals are being disturbed.
Nearby automobile traffic or airplanes.
Excessive distortion in
the sound of stereo
broadcasts.
Nearby building or mountain.
[Multi-path distortion is being caused by the
mutual interference of broadcast signals re-
ceived directly from the transmitting station
(direct waves) and signals being reflected from
nearby buildings or mountains (reflected
waves). |
e Try changing the location, height and/or direction of
the antenna.
ef an interior antenna is being used, change to an
exterior antenna.
e Try using an antenna with more elements.
An unusual “popping”
noise is heard when
automobiles pass.
Such noise is called ignition noise, and occurs
while the automobile engine is running.
e Relocate the antenna and the connection wires
leading to it to a place farther away from where auto-
mobiles pass.
A strange hissing noise
is produced continu-
ously or intermittently.
Caused by the “discharge phenomenon” and
the “oscillation phenomenon” of electric
appliances (such as fluorescent lights, TV,
small series-type motors, rectification equip-
ment, etc.).
e Try placing this unit farther away from such
equipment.
e Install noise-prevention equipment on this unit oron
the electric appliance.
Station selection cannot
be made by using the
preset-tuning buttons.
The preset-tuning buttons have not been
preset.
e Make the presettings.
The “most-recent”
memory will not be
reset.
The charge of the gold capacitor which main-
tains the "back-up" memory is exhausted.
e Set the power switch to the “on” position for 30
minutes or more to perform the charging, and then
make the memory presetting again.
While listening to AM broadcasts |
An unusual “beat”
sound is heard.
Unit is being used at the same time as the
television set.
e Turn off the television set, or use this unit farther
away from it.
A low-pitched “hum”
sound is heard when the
broadcast is tuned.
The antenna connection wires are too close to
the power cord.
cord farther apart.
e Place the antenna connection wires and the power
The power supply frequency from the power |
cord is modulated and heard from the speakers.
e Try reversing the connection of the power cord plug.
e Install a special exterior antenna.
A strange hissing noise
is produced continu-
ously or intermittently.
Caused by the “discharge phenomenon” and
the "oscillation phenomenon” of electric
appliances (such as fluorescent lights, TV,
small series-type motors, rectification equip-
ment, etc.).
e Try placing this unit farther away from such
equipment.
e Install noise-prevention equipment on this unit or
on the electric appliance.
Station selection cannot
be made by using the
preset-tuning buttons.
The preset-tuning buttons have not been
preset.
e Make the presettings. |
The charge of the gold capacitor which main-
tains the “back-up” memory is exhausted.
eSet the power switch to the “on” position for
30 minutes or more to perform the charging, and
then make the memory presetting again.
Чо.

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