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RX-4105
AM/FM STEREO RECEIVER
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Introduction
UNPACKING AND INSTALLATION
Congratulations on Your Purchase!
FOR U.S.A.
Your new high fidelity receiver is designed to deliver
maximum enjoyment and years of trouble free service.
Please take a few moments to read this manual
thoroughly. It will explain the features and operation of
your unit and help ensure a trouble free installation.
Please unpack your unit carefully. We recommend that
you save the carton and packing material. They will be
helpful if you ever need to move your unit and may be
required if you ever need to return it for service. Your unit
is designed to be placed in a horizontal position and it is
important to allow at least two inches of space behind
your unit for adequate ventilation and cabling
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.
FCC INFORMATION
This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference in a residential
installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may
cause harmful interference to radio communications.
However, there is no guarantee that interference will
not occur in a particular installation. If this equipment
does cause harmful interference to radio or
television reception, which can be determined by
turning the equipment off and on, the user is
encouraged to try to correct the interference by one
or more of the following measures:
convenience.
To avoid damage, never place the unit near radiators, in
front of heating vents, in direct sunlight, or in excessively
humid or dusty locations. Connect your complementary
components as illustrated in the following section.
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.
Reorient or relocate the receiving antenna.
Increase the separation between the equipment
and receiver.
Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
This symbol is intended to alert the user 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.
Consult the dealer or an experienced radio/TV
technician for help.
CAUTION: Any changes or modifications in
construction of this device which are not expressly
approved by the party responsible for compliance
could void the user's authority to operate the
equipment.
This symbol is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
WARNING
Caution regarding placement
(Except for U.S.A. and Canada)
To reduce the risk of fire or electric shock, do not expose
this appliance to rain or moisture.
To maintain proper ventilation, be sure
to leave a space around the unit (from
the largest outer dimensions including projections)
equal to, or greater than, shown below.
Caution : Do not block ventilation openings or stack
other equipment on the top.
Left and right panels: 5 cm
Rear panel: 10 cm
Top panel: 20 cm
2
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READ THIS BEFORE OPERATING YOUR UNIT
FOR U.S.A AND CANADA .................................. 120 V
FOR OTHER COUNTRIES ........................ 115 V/230 V
FOR YOUR SAFETY
FOR YOUR SAFETY
Units shipped to the U.S.A and Canada are designed
for operation on 120 V AC only.
Units shipped to countries other than the above
countries are equipped with an AC voltage selector
switch on the rear panel. Refer to the following
paragraph for the proper setting of this switch.
Safety precaution with use of a polarized AC plug.
However, some products may be supplied with a
nonpolarized plug.
AC VOLTAGE SELECTION
This unit operates on 115/230 V AC. The AC voltage
selector switch on the rear panel is set to the voltage
that prevails in the area to which the unit is shipped.
Before connecting the power cord to your AC outlet,
make sure that the setting position of this switch
matches your line voltage. If not, it must be set to
your voltage in accordance with the following
direction.
CAUTION : To prevent electric shock, match wide
blade of plug to wide slot, fully insert.
FOR CHINA, EUROPE AND AUSTRALIA ........ 220V/230V/240V
FOR YOUR SAFETY
Units shipped to China are designed for operation on
220 V AC only.
AC voltage selector switch
Units shipped to Australia are designed for operation
on 240 V AC only.
To ensure safe operation, the three-pin plug supplied
must be inserted only into a standard three-pin
power point which is effectively earthed through the
normal household wiring. Extension cords used with
the equipment must be three-core and be correctly
wired to provide connection to earth.
Improper extension cords are a major cause of
fatalities. The fact that the equipment operates
satisfactorily does not imply that the power point is
earthed and that the installation is completely safe.
For your safety, if in any doubt about the effective
earthing of the power point, consult a qualified
electrician.
Move switch lever to match your line voltage with a
small screwdriver or other pointed tool.
PAN-EUROPEAN UNIFIED VOLTAGE
All units are suitable for use on supplies 230-240 V
AC.
3
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CONTENTS
SAFETY INSTRUCTIONS ............................................................................................................ 1
Introduction
UNPACKING AND INSTALLATION............................................................................................. 2
READ THIS BEFORE OPERATING YOUR UNIT ....................................................................... 3
System Connections .................................................................................................................... 5
Front Panel & Remote Controls ................................................................................................ 7
REMOTE CONTROL OPERATION RANGE .............................................................................. 9
LOADING BATTERIES ............................................................................................................... 9
Operations
LISTENING TO A PROGRAM SOURCE .................................................................................. 10
LISTENING TO RADIO BROADCASTS ................................................................................... 12
RECORDING ............................................................................................................................ 14
OTHER FUNCTIONS ................................................................................................................ 14
Troubleshooting Guide ............................................................................................................. 15
Specifications .............................................................................................................................. 16
4
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System Connections
• Do not plug the AC input cord into the wall AC outlet until all connections are completed.
• Be sure to connect the white RCA pin cords to the L(left) and the red RCA pin cords to the R(right) jacks when
making audio connections.
• Change the position of the FM indoor antenna until you get the best reception of your favorite FM stations.
• A 75 Ω outdoor FM antenna may be used to further improve the reception.
Disconnect the indoor antenna before replacing it with the outdoor one.
• Place the AM loop antenna as far as possible from the receiver, TV set, speaker cords and the AC input cord and
set it to a direction for the best reception.
• If the reception is poor with the AM loop antenna, an AM outdoor antenna can be used in place of the AM loop
antenna.
• Make connections firmly and correctly. If not, it can cause loss of sound, noise or damage to the receiver.
• If the electricity fails or the AC input cord is left unplugged for more than several days, the memorized contents will
be cleared. Should this happen, memorize them again.
5
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6
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Front Panel & Remote Controls
7
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POWER BUTTON
NUMERIC BUTTONS(0 ~ 9)
Press these buttons to select or to store preset
stations directly.
Each time the POWER button is pressed, this unit is
turned on to enter the operating mode or off to enter
the standby mode.
TUNING/PRESET UP/DOWN(
Press these buttons to tune in the desired stations.
BUTTONS
STANDBY INDICATOR
HEADPHONE JACK
Stereo headphones with a standard 1/4 inch plug
can be plugged into this jack for private listening.
FM MODE BUTTON
Press this button to select the desired FM mode.
Each time this button is pressed, the FM mode is
changed to the stereo mode or the mono mode.
SPEAKER A, B SELECTOR BUTTONS
These buttons allow you to select various
combinations of speakers as follows:
To drive A speakers, press only the SPEAKER A
button (“SPK A” is displayed).
PRESET SCAN BUTTON
Press this button to scan the stations in the preset
sequence.
To drive B speakers, press only the SPEAKER B
button (“SPK B” is displayed).
VOLUME CONTROL KNOB, UP/DOWN(
BUTTONS
Adjust the volume to a comfortable listening level
)
To drive both A and B speakers, press the
SPEAKER A(or B) and B(or A) buttons in
order.(“SPK A B” is displayed).
with this knob or these buttons.
When using headphones for private listening,
press these buttons in order to switch off the
speaker A and B (“SPK OFF” is displayed).
MUTE BUTTON
Press this button to temporarily mute the sound.
Press again to resume the previous sound level.
INPUT SELECTOR BUTTONS
Press the button to select the desired input source.
DIMMER BUTTON
Press this button to select the brightness of the
fluorescent display as desired.
Each time this button is pressed, the brightness
of the fluorescent display changes together as
follows:
TONE BUTTON
When adjusting the tone (bass and treble), press
this button to select the desired tone mode.
Each time this button is pressed, the tone mode
is changed to bass or treble.
SLEEP BUTTON
Press this button to activate the sleep timer for a
specified period of time.
BALANCE BUTTON
When adjusting the sound volume balance, press
this button to enter the balance mode.
Each time this button is pressed, the sleep time
changes as follows:
BALANCE, TREBLE/BASS UP/DOWN
(
) BUTTONS
At the balance mode, adjust the sound volume
balance between left and right speakers with
these buttons.
REMOTE SENSOR
This receives the signals from the remote control
unit.
At the desired tone mode, adjust the tone as
desired with these buttons.
FLUORESCENT DISPLAY
For details, see the next page.
TONE DIRECT BUTTON
Press this button to listen to a program source
without the tone effect.
MEMORY BUTTON
Press this button to store preset stations.
TUNING/PRESET MODE BUTTON
Press this button to select the tuning mode or the
preset mode.
8
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FLUORESCENT DISPLAY
LOADING BATTERIES
REMOTE CONTROL OPERATION RANGE
Remove the cover.
1
Load two batteries matching the
polarity.
2
Use the remote control unit within a range of
about 7 meters (23 feet) and angles of up to 30
degrees aiming at the remote sensor.
Remove the batteries when they are not used for a
long time.
Do not use the rechargeable batteries(Ni-Cd type).
9
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Operations
LISTENING TO A PROGRAM SOURCE
Switch the desired speakers on.
Turn the power on.
2
1
Each time this button is pressed, this unit is turned
on to enter the operating mode or off to enter the
standby mode.
In the standby mode, the STANDBY indicator lights
up. This means that the receiver is not
Then the corresponding speaker
disconnected from the AC mains and a small
amount of current is retained to support the
memorized contents and operation readiness.
In the standby mode, if an INPUT SELECTOR
button is pressed, the unit is turned on
indication(“SPK A(or/and) B”) is displayed and
the sound can be heard from the speakers
connected to the selected speaker terminals.
When using the headphones for private
listening, press the corresponding SPEAKER
button to switch off both A and B speakers.
automatically and the desired input is selected.
Select the desired input source.
Operate the selected component for
playback.
3
4
Adjust the volume to a comfortable
listening level.
5
Each time the FM/AM button on the front panel
or the TUNER button on the remote control is
pressed, the band is changed to AM or FM.
To mute the sound.
To listen with the headphones.
6
7
“MUTE” lights up and flickers.
To resume the previous sound level, press this
button again.
Be sure to switch off both A and B speakers.
10
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At the desired tone mode, adjust the
tone as desired.
Adjusting the tone(bass and treble)
9
Enter the tone mode.
8
Each time this button is pressed, the
corresponding tone mode is selected and
shown for 3 seconds as follows:
If the tone display disappears, start from the
step 8 again.
Notes:
Extreme settings at high volume may damage
your speakers.
In general, the bass and treble levels are
adjusted to 0.
Note:
When the tone direct function is activated, the
tone mode cannot be entered and “TON DIR”
flickers for 3 seconds.
To listen to a program source without the tone
effect.
10
“TON DIR” is displayed and the sound that
bypasses the tone circuitry will be heard.
To cancel the tone direct function, press this
button again to display “TON CTRL”.
Adjust the sound volume balance
between the left and right speakers.
12
Adjusting the sound volume balance
Enter the balance mode.
11
“BAL” and the balance level is displayed for 3
seconds.
If the balance display disappears, start from
the step 11 again.
Note:
In general, the balance level is set to 0.
11
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LISTENING TO RADIO BROADCASTS
Auto tuning
Select the tuner and then the desired
band.
1
• Each time this button is pressed, the band is
changed to FM or AM.
Press the TUNING/PRESET UP(
or DOWN( ) button for more than
0.5 second.
)
Select the tuning mode.
3
2
• Each time this button is pressed, the mode
changes as follows:
• The tuner will now search until a station of
sufficient strength has been found. The display
shows the tuned frequency and “TUNED”.
• If the station found is not the desired one,
simply repeat this operation.
• Weak stations are skipped during auto tuning.
Manual tuning
• Manual tuning is useful when you already know the
frequency of the desired station.
• Perform the steps 1 and 2 in “Auto tuning” procedure
and press the TUNING/PRESET UP( ) or
DOWN( ) button repeatedly until the right frequency
has been reached.
Press the MEMORY button.
Presetting radio stations
2
• You can store up to 30 preferred stations in the
memory.
Tune in the desired station with auto or
manual tuning.
1
• “MEMO” is flickering for 5 seconds.
12
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Repeat the above steps 1 to 3 to
memorize other stations.
Select the desired preset number (1~30)
and press the MEMORY button.
4
3
MEMORY BACKUP FUNCTION
The following items, set before the receiver is turned
off, are memorized.
• INPUT SELECTOR settings
• When using the NUMERIC buttons on the remote
control.
Examples) For “3” :
• Preset stations,etc.
For “15” :
Note
For “30” :
• If the electricity fails or the AC input cord is
disconnected for more than several days, they are
all cleared. So you should memorize them again.
• The station has now been stored in the memory.
• When using the NUMERIC buttons, the station is
stored automatically without pressing the MEMORY
button.
• A stored frequency is erased from the memory by
storing another frequency in its place.
• If “MEMO” goes off, start again from the above step 2.
Select the desired preset number.
Tuning to preset stations
2
After selecting the tuner as an input
source, select the preset mode.
1
• When using the NUMERIC buttons on the remote
control.
Examples) For “3” :
For “15” :
For “30” :
• Then “PRESET” lights up.
• When selecting the desired preset number with the
NUMERIC buttons, the desired preset station will be
tuned to automatically without selecting the preset
mode.
Scanning preset stations in sequence
Listening to FM stereo broadcasts
• While listening to FM broadcasts,
• Each time this button is pressed,
the FM mode changes as follows:
• The receiver will start scanning the stations in the
preset sequence.
• When FM stereo broadcasts are poor because of
weak broadcast signals, select the FM mono mode
to reduce the noise, then FM broadcasts are
reproduced in monaural sound.
• At the desired station, press this button again to stop
scanning.
13
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RECORDING
The volume, tone(bass, treble) and balance settings have no effect on the recording signals.
When you select tuner, CD or TV/AUX as a recording source, recording may be made on TAPE or VCR, or both
simultaneously.
Recording with TAPE
Recording with VCR
Select the desired input as a recording
source except for TAPE.
Select the desired input as a recording
source except for VCR.
1
1
Start recording on the TAPE.
Start play on the desired input.
Start recording on the VCR.
2
3
2
3
Start play on the desired input.
The audio signals from the desired input will
be recorded onto the VCR.
OTHER FUNCTIONS
Operating the sleep timer
Adjusting the brightness of the
fluorescent display
The sleep timer allows the
system to continue to operate
for a specified period of time
before automatically shutting
off.
To set the receiver to
automatically turn off after
the specified period of time.
Each time this button is pressed, the sleep time
changes as follows:
Each time this button is pressed, the
brightness of the fluorescent display changes
together as follows:
While operating the sleep timer, “SLEEP” lights
up.
In the display OFF mode, pressing any button
will restore the display ON mode.
When the sleep time is selected, the fluorescent
display is dimly lit.
14
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Troubleshooting Guide
If a fault occurs, run through the table below before taking your receiver for repair.
If the fault persists, attempt to solve it by switching the receiver off and on again. If this fails to resolve the situation,
consult with your dealer. Under no circumstances should you repair the receiver yourself as this could invalidate
the warranty.
PROBLEM
POSSIBLE CAUSE
REMEDY
• Connect the cord securely.
• Check the outlet using a lamp or another
appliance.
No power
• The AC input cord is disconnected.
• Poor connection at AC wall outlet or the
outlet is inactive.
• Check the speaker connections.
• Adjust the volume.
No sound
• The speaker cords are disconnected.
• The volume is adjusted too low.
• The MUTE button on the remote control is
pressed to ON.
• Press the MUTE button to cancel the
muting effect.
• Press the SPEAKER A or B button to ON.
• Select the desired input source correctly.
• Make connections correctly.
• Speakers are not switched on.
• Incorrect selection of the input source.
• Incorrect connections between the
components.
• Connect an antenna.
Stations cannot be
received
• No antenna is connected.
• The desired station frequency is not tuned
in.
• Tune in the desired station frequency.
• Move the antenna and retry tuning.
• Memorize the correct station frequency.
• Memorize the stations again.
• The antenna is in wrong position.
Preset stations cannot be
received
• An incorrect station frequency has been
memorized.
• The memorized stations are cleared.
• Connect an antenna.
Poor FM reception
• No antenna is connected.
• The antenna is not positioned for the best
reception.
• Change the position of the antenna.
Change the position of the antenna.
Install an outdoor antenna.
•
•
Continuous hissing noise
during FM reception,
• Weak signals.
especially when a stereo
broadcast is received.
• Keep the receiver away from noise
sources.
Continuous or intermittent
hissing noise during AM
reception, especially at
night.
• Noise is caused by motors, fluorescent
lamps or lightning, etc.
• Install an outdoor AM antenna.
• Make connections correctly.
No recording
• Incorrect selection between the
components.
• Operate each component correctly.
• Incorrect operation of each component for
playback and recording.
• Replace the batteries.
• Remove the obstacle.
Remote control unit does
not operate.
• Batteries are not loaded or exhausted.
• The remote sensor is obstructed.
15
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Specifications
AMPLIFIER SECTION
Power output, stereo mode, 8 Ω, THD 0.08 %, 40 Hz~20 kHz ............................................................... 2X105 W
Total harmonic distortion, 8 Ω, 100 W, 20 Hz~20 kHz ............................................................................. 0.04 %
Intermodulation distortion
60 Hz : 7 kHz= 4 : 1 SMPTE, 8 Ω, 100 W .................................................................................................... 0.1 %
Input sensitivity, 47 kΩ
Line ........................................................................................................................................................... 200 mV
Signal to noise ratio, IHF “A” weighted
Line .............................................................................................................................................................. 95 dB
Frequency response
Line, 10 Hz~100 kHz ................................................................................................................................. 3 dB
Output level
TAPE/VCR OUT, 2.2 kΩ ........................................................................................................................... 200 mV
Bass/Treble control, 100 Hz/10 kHz ......................................................................................................... 10 dB
FM TUNER SECTION
Tuning frequency range ................................................................................................................. 87.5~108 MHz
Usable sensitivity, THD 3%, S/N 30 dB ...................................................................................................... 15 dBf
50 dB quieting sensitivity, mono/stereo ............................................................................................ 25.2/45.2 dBf
Signal to noise ratio, 65 dBf, mono/stereo .............................................................................................. 68/65 dB
Total harmonic distortion, 65 dBf, 1 kHz, mono/stereo ........................................................................... 0.5/0.8%
Frequency response, 25 Hz~14 kHz .......................................................................................................... 3 dB
Stereo separation, 1 kHz .............................................................................................................................. 35 dB
Capture ratio .................................................................................................................................................. 4 dB
IF rejection ratio ........................................................................................................................................... 80 dB
AM TUNER SECTION
Tuning frequency range ................................................................................................................. 520~1710 kHz
Usable sensitivity ..................................................................................................................................... 800 V/m
Signal to noise ratio ...................................................................................................................................... 40 dB
Selectivity ..................................................................................................................................................... 25 dB
GENERAL
Power supply ................................................................................................................................... 120 V~ 60 Hz
Power consumption ........................................................................................................................................ 2.5A
Dimensions (W
H
D) ........................................................... 440 138 332 mm(17-3/8 5-7/16 13 inches)
Weight (Net) ................................................................................................................................ 9.0 kg(19.85 lbs)
Note: Design and specifications are subject to change without notice for improvements.
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RX-4105
AM/FM STEREO RECEIVER
5707-04740-004-1
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