SHERWOOD Receivers Manual L0908501

User Manual: SHERWOOD SHERWOOD Receivers Manual SHERWOOD Receivers Owner's Manual, SHERWOOD Receivers installation guides

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RX-4105
AM/FM STEREO RECEIVER

SAFETY INSTRUCTIONS
1. Read Instructions
- All the safety and operating instructions should
be read before the product is operated.
2. Retain instructions
- The safety and operating instructions should
be retained for future reference.
3. Heed Warnings - All warnings on the product and in the operating
instructions should be adhered to.
4. Follow Instructions
- All operating and use instructions should be
followed.
5. Cleaning - Unplug this product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for
cleaning.
6. Attachments
- Do not use attachments not recommended by the
product manufacturer as they may cause hazards.
7. Water and Moisture - Do not use this product near water - for
example, near a bath tub, wash bowl, kitchen sink, or laundry tub; in
a wet basement, or near a swimming pool; and the like.
8. Accessories
- Do not place this product on an unstable cart, stand,
tripod, bracket, or table. The product may fall, causing serious injury
to a child or adult, and serious damage to the product. Use only with
a cart, stand, tripod, bracket, or table recommended by the
manufacturer, or sold with the product. Any mounting of the product
should follow the manufacturer's
instructions, and should use a
mounting accessory recommended by the manufacturer.
9. A product and cart combination should be moved with care. Quick
stops, excessive force, and uneven surfaces may cause the product
and cart combination to overturn.
10. Ventilation - Slots and openings in
the cabinet are provided for
ventilation and to ensure reliable

11.

12.

13.

14.

operation of the product and to
protect it from overheating, and
these openings must not be
blocked or covered. The openings
should never be blocked by placing PORTABLECART WARNING
the product on a bed, sofa, rug, or other similar surface. This
product should not be placed in a built-in installation such as a
bookcase or rack unless proper ventilation is provided or the
manufacturer's instructions have been adhered to.
Power Sources - This product should be operated only from the
type of power source indicated on the marking label. If you are not
sure of the type of power supply to your home, consult your product
dealer or local power company. For products intended to operate
from battery power, or other sources, refer to the operating
instructions.
Grounding or Polarization - This product may be equipped with a
polarized alternating-current
line plug (a plug having one blade
wider than the other). This plug will fit into the power outlet only one
way. This is a safety feature. If you are unable to insert the plug
fully into the outlet, try reversing the plug. If the plug should still fail
to fit, contact your electrician to replae your obsolete outlet. Do not
defeat the safety purpose of the polarized plug.
Alternate Warnings - This product is equipped with a three-wire
grounding-type plug, a plug having a third(grounding)
pin. This plug
will only fit into a grounding-type power outlet, this is a safety
feature. If you are unable to insert the plug into the outlet, contact
your electrician to replace your obsolete outlet. Do not defeat the
safety purpose of the gronding-type plug.
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
product.
Outdoor Antenna Grounding - If an outside antenna or cable
system is connected to the product, be sure the antenna or cable
system is grounded so as to provide some protection against
voltage surges and built-up static charges. Article 810 of the
National Electrical Code, ANSl/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
grounding electrode. See Figure 1.
Figure

for the

Example
of antenna
grounding
as per
National
Electrical
Code, ANSm/NFPA
70

POWER

SERVICE

ELECTRODE
(NEC

ART

GROUNDING

SYSTEM
250,

PART

15. Lightning - For added protection for this product during a lightning
storm, or when it is left unattended and unused for long periods of
time, unplug it from the wall outlet and disconnect the antenna or
cable system. This will prevent damage to the product due to
lightning and power-line surges.
16. Power Lines - An outside antenna system should not be located in
the vicinity of overhead power lines or other electric light or power
circuits, or where it can fall into such power lines or circuits. When
installing an outside antenna system, extreme care should be taken
to keep from touching such power lines or circuits as contact with
them might be fatal.
17. Overloading
- Do not overload wall outlets, extension cords, or
integral convenience receptacles as this can result in a risk of fire
or electric shock.
18. Object and Liquid Entry - Never push objects of any kind into this
product through openings as they may touch dangerous voltage
points or short-out parts that could result in a fire or electric shock.
Never spill liquid of any kind on the product.
19. Servicing
- Do not attempt to service this product yourself as
opening or removing covers may expose you to dangerous voltage
or other hazards. Refer all servicing to qualified service personnel.
20. Damage Requiring
Service - Unplug this product form the wall
outlet and refer servicing to qualified service personnel under the
following conditions:
a) When the power-supply cord or plug is damaged,
b) If liquid has been spilled, or objects have fallen into the
product,
c) If the product has been exposed to rain or water,
d) If the product does not operate normally by following the
operating instructions. Adjust only those controls that are
covered by the operating instructions as an improper
adjustment of other controls may result in damage and will
often require extensive work by a qualified technician to
restore the product to its normal operation.
e) If the product has been dropped or damaged in any way, and
f) When the product exhibits a distinct change in performance this indicates a need for service.
21. Replacement Parts - When replacement parts are required, be
sure the service technician has used replacement parts specified
by the manufacturer or have the same characteristics as the
original part. Unauthorized substitutions may result in fire, electric
shock, or other hazards.
22. Safety Check - Upon completion of any service or repairs to this
product, ask the service technician to perform safety checks to
determine that the product is in proper operating condition.
23. Wall or Ceiling Mounting - The product should be mounted to a
wall or ceiling only as recommended by the manufacturer.
24. Heat - The product should be situated away from heat sources
such as radiators, heat registers, stoves, or other products
(including amplifiers) that produce heat.

Introduction
UNPACKING

AND INSTALLATION

Congratulations
on Your Purchase!
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
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.

[o_:Auii [o]_1
RISK

OF ELECTRIC
SHOCK
DO NOT OPEN

• 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:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.

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.

•

FOR U.S.A.

This symbol is intended to alert the user to the
presence of uninsutated "dangerous voltage"
within the product's enclosure that may be of
. sufficient magnitude to constitute a risk of
electric shock to persons.
This symbol is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.

To reduce the risk of fire or electric shock, do not expose
this appliance to rain or moisture.
Caution : Do not block ventilation openings or stack
other equipment on the top.

• Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
• Consult the dealer or an experienced
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.
Caution regarding placement
(Except for U.S.A. and Canada)
/11\
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.
Left and right panels: 5 cm
Rear panel: 10 cm
Top panel: 20 cm

radio/TV

READ THIS BEFORE OPERATING YOUR UNIT
FOR U.S.A AND

CANADA

..................................

120 V

FOR OTHER

Units shipped to the U.S.A and Canada are designed
for operation on 120 V AC only.

COUNTRIES

........................

115 V/230 V

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
nonpotarized plug.
CAUTION : To prevent electric shock, match wide
blade of plug to wide slot, fully insert.

FOR CHINA,EUROPEANDAUSTRALIA........220V/230V/240V

Units shipped to China are designed for operation on
220 V AC only.
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.
PAN-EUROPEAN UNIFIED VOLTAGE
All units are suitable for use on supplies 230-240 V
AC.

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.

AC voltage selector switch

Move switch lever to match your line voltage with a
small screwdriver or other pointed toot.

CONTENTS
SAFETY

INSTRUCTIONS

............................................................................................................

Introduction
• UNPACKING AND INSTALLATION .............................................................................................

• READ THIS BEFORE OPERATING YOUR UNIT .......................................................................

System
Front

Connections

....................................................................................................................

Panel & Remote

Controls

................................................................................................

• REMOTE CONTROL OPERATION
• LOADING BATTERIES

RANGE ..............................................................................

5
7
9

...............................................................................................................

• LISTENING TO A PROGRAM SOURCE ..................................................................................

• LISTENING TO RADIO BROADCASTS

Operations

• RECORDING

............................................................................................................................

• OTHER FUNCTIONS
Troubleshooting
Specifications

...................................................................................

Guide

................................................................................................................

.............................................................................................................

..............................................................................................................................

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(teft) 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 O 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.

/_S

• CONNECTINGAUDIO/VIDEOCOMPONENTS

II CONNECTING ANTENNAS

CD player

FM
(OUTDOOR

ANTENNA)
TV or additional

component

AUDIO OUT

FM
(INDOOR ANTENNA)
I-i_ i',4

Tape deck

PLAY(LINE) OUT
_

Video

deck

or MD recorder,

•

REC(LINE) IN
etc.

AUDIO OUT

AUDIO IN

• The VCR jacks may also be connected to an additional
component such as MD recorder, tape deck, etc.
• The TV/AUX jacks may also be connected to an additional
component such as a TV, DVD player, etc.

-•

AC INPUT CORD -Plug this cord into a
wall AC outlet.

_L_--

L..____j
• CONNECTING SPEAKERS

Speaker A
Right

Left

Right

Left

Speaker B

• Usually SPEAKER A terminals are used for only a pair of
speakers. When you have another pair of speakers,
SPEAKER B terminals can be used.
• Never short-circuit the + and - speaker cords.
• Be sure to connect speakers firmly and correctly
according to the channel (left and right) and the polarity
(+ and -).
• Note :
• For safe amplifier operation, use speakers with
impedance of over 8/2 when you use only SPEAKER A or
B erminals and use the speakers with impedance of over
16# when you use both SPEAKER A and B terminals.

Front Panel & Remote Controls

@
@@@

Sherwood

-H
@@

@
®

@
@
@
@
@
@
Sherwood
REMOTECONTROLUNIT RC-101

O POWER BUTTON
Each time the POWER button is pressed, this unit is
turned on to enter the operating mode or off to enter
the standby mode.
@ STANDBY INDICATOR
(_ HEADPHONE JACK
Stereo headphones with a standard 1/4 inch plug
can be plugged into this jack for private listening.
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).
• To drive B speakers, press only the SPEAKER B
button ("SPK B" is displayed).
• 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).
• When using headphones for private listening,
press these buttons in order to switch off the
speaker A and B ("SPK OFF" is displayed).
@ INPUT SELECTOR BUTTONS
Press the button to select the desired input source.
@TONE BUTTON
When adjusting the tone (bass and treble), press
this button to select the desired tone mode.

@ NUMERIC BUTTONS(0 ~ 9)
Press these buttons to select or to store preset
stations directly.
@ TUNING/PRESET UP/DOWN(A/V)
BUTTONS
Press these buttons to tune in the desired stations.
@ 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.
PRESET SCAN BUTTON
Press this button to scan the stations in the preset
sequence.
VOLUME CONTROL KNOB, UP/DOWN(+/-)
BUTTONS
Adjust the volume to a comfortable listening level
with this knob or these buttons.
@ MUTE BUTTON
Press this button to temporarily mute the sound.
Press again to resume the previous sound level.
@ 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:

• Each time this button is pressed, the tone mode
is changed to bass or treble.
(_ BALANCE BUTTON
When adjusting the sound volume balance, press
this button to enter the balance mode.
BALANCE, TREBLE/BASS UP/DOWN
(A/V) BUTTONS
_ At the balance mode, adjust the sound volume
balance between left and right speakers with
these buttons.
@ At the desired tone mode, adjust the tone as
desired with these buttons.
@TONE DIRECT BUTTON
Press this button to listen to a program source
without the tone effect.
O 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.

-_ON

--* dimmer

--_ OFF q

(_ SLEEP BUTTON
Press this button to activate the sleep timer for a
specified period of time.
• Each time this button is pressed, the sleep time
changes as follows:
F10

===_
20 ==_30
===_
90 ==_OFF j
Unit :='_60
minutes

REMOTE SENSOR
This receives the signals from the remote control
unit.
@ FLUORESCENT DISPLAY
For details, see the next page.

IFLUORESCENT

DISPLAY
STEREO

INDICATOR

MEMORY

INDICATOR

TUNED INDICATOR

TUNED

PRESET
.....

..............................................

' --MEM

IN1 INt IN! IN1-tN!.IN! &7 M.zi,'n ,'-I
SLEEP

PRESET NUMBER, SLEEP TIME DISPLAY
INPUT, FREQUENCY, VOLUME LEVEL, OPERATING INFORMATION, etc.

REMOTECONTROLOPERATIONRANGE

LOADING BATTERIES

Remove the cover.

Load two batteries matching the
polarity.

2 x 1.5V

CAAA"size)
• 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 rechargeabte batteries(Ni-Cd type).

Operations
LISTENING TO A PROGRAM SOURCE
Turn the power on.

Switch the desired speakers on.

ON/STANDBY

O_CD

• 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
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
automatically and the desired input is selected.

• Then the corresponding speaker
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.

Select the desired input source.

_ FM/AM

TAPE

_ _//AUX

Operate the selected component for
playback.
_

VCR

Adjust the volume to a comfortable
listening level.

VOLUME

• 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.

DOWI'

To listen with the headphones.

C!D CC_ C_D
PHONES

s--'-%

_.z_%

• "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.

Adjusting the tone(bass and treble)

At the desired tone mode, adjust the
tone as desired.

Enter the tone mode.
TONE

• Each time this button is pressed, the
corresponding tone mode is selected and
shown for 3 seconds as follows:
r

BASS _

TRBL q

• Note:
• When the tone direct function is activated, the
tone mode cannot be entered and "TON DIR"
flickers for 3 seconds.

• If the tone display disappears, start from the
step 8 again.
IINotes:
• Extreme settings at high volume may damage
your speakers.
• In general, the bass and treble levels are
adjusted to 0.

To listen to a program source without the tone
effect.
TONE

DIRECT

Adjusting the sound volume balance

• "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.

Enter the balance mode.
A

BALANCE

CCu
• "BAL" and the balance level is displayed for 3
seconds.

• If the balance display disappears, start from
the step 11 again.
IINote:
• In general, the balance level is set to 0.

LISTENING TO RADIO BROADCASTS

//_Auto

tuning

Ii
1_4
1---- I I

I--I I--1 I-1_1
I, _1

I--I
LI

....

FI
U

BAND

FREQUENCY

• Each time this button is pressed, the band is
changed to FM or AM.

Press the TUNING/PRESET UP(A)
or DOWN(v) button for more than
0.5 second.

Select the tuning mode.
0_0
T/P

MODE

TUNING/PRESBT

• The tuner wilt now search untJl 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 statJons are skipped during auto tuning.

• Each tJme this button is pressed, the mode
changes as follows:

Tuning mode :,'PRESE:'
Preset mode : PRESET

goes off.-----]
lights up,* ----J

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(A) or
DOWN(v) button repeatedly until the right frequency
has been reached.

] L NIN(/PRi

SEt

Press the MEMORY button.

Presetting radio stations

CD CD GD

• You can store up to 30 preferred statJons in the
memory.
Tune in the desired statJon with auto or
manual tuning.

CD CD Ci:_

MEMORY

• "MEMO" is flickering for 5 seconds.

Select the desired preset number (1 ~30)
and press the MEMORY button.

Repeat the above steps 1 to 3 to
memorize other stations.

MEMORY

tUNING/PRESEt

MEMORY

• MEMORY
• When using the NUMERIC
control.
Examples)
For"3":
_)

buttons

on the remote

within 2 seconds

For "15" :

For "30": __
• The station has now been stored in the memory.
• When using the NUMERIC buttons, the station is
stored automatically without pressing the MEMORY
button.

BACKUP FUNCTION

The following items, set before the receiver is turned
off, are memorized.
• INPUT SELECTOR settings
• Preset stations,etc.
• Note
• 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.

• 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.

Tuning to preset stations

Select the desired preset number.
O

C_ Cb

After selecting the tuner as an input
source, select the preset mode.
Or

T/P

MODE

• When using the NUMERIC buttons on the remote
control.
Examples)
For"3"
_)
For "15" " _-_
• Then "PRESET" lights up.

Listening to FM stereo broadcasts

within 2 seconds

_._

For"30" : _o_
• 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

• While listening to FM broadcasts,

• Each time this button is pressed,
the FM mode changes as follows:
E

tereo mode : "ST" lights up. "-7
Mono mode :"ST" goes off.

• 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.

• The _ceiver willstart scanningthe stationsinthe
preset sequence.
• Atthe desired station, pressthis button again to stop
scanning.

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

cording
with TAPE
Select the desired input as a recording
source except for TAPE.
TV/ANX

with VCR

Select the desired input as a recording
source except for VCR.

VCR

Start recording on the TAPE.

Start recording on the VCR.

Start play on the desired input.

• The audio signals from the desired input will
be recorded onto the VCR.

OTHER FUNCTIONS

/_erating

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 (_[) C!:)
off.
_ _
• To set the receiver to
automatically turn off after
the specified period of time.

GP _'i:_i_

• Each time this button is pressed, the sleep time
changes as follows:
F

• Each time this button is pressed, the
brightness of the fluorescent display changes
together as follows:

10 =-* 20 =-_30
60 --_ 90 -=* OFF q
Unit :--*
minutes
F

• While operating the sleep timer, "SLEEP" lights
up.
• When the sleep time is selected, the fluorescent
display is dimly tit.

ON --'*dimmer

---*OFF

• In the display OFF mode, pressing any button
will restore the display ON mode.

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
No power

POSSIBLE

CAUSE

REMEDY

• The AC input cord is disconnected.
• Poor connection at AC wall outlet or the
outlet is inactive,

No sound

• Connect the cord securely.
• Check the outlet using a lamp or another
appliance.

• The speaker cords are disconnected.
• The volume is adjusted too low.
• The MUTE button on the remote control is

• Check the speaker connections.
• Adjust the volume.
• Press the MUTE button to cancel the

pressed to ON.
• Speakers are not switched on.

muting effect.
• Press the SPEAKER A or B button to ON.

• Incorrect selection of the input source.
• Incorrect connections between the

• Select the desired input source correctly.
• Make connections

correctly.

components.
Stations cannot be

• No antenna is connected.

received

• The desired station frequency
in.

Preset stations cannot be
received

Poor FM reception

Continuous hissing noise

• Connect an antenna.
is not tuned

• The antenna is in wrong position.

• Move the antenna and retry tuning.

• An incorrect station frequency
memorized.

• Memorize the correct station frequency.

has been

• The memorized stations are cleared.

• Memorize the stations again.

• No antenna is connected.

• Connect an antenna.

• The antenna is not positioned for the best
reception.

• Change the position of the antenna.

• Weak signals.

• Change the position of the antenna.
• Install an outdoor antenna.

• Noise is caused by motors, fluorescent
lamps or lightning, etc.

• Keep the receiver away from noise
sources.
• Install an outdoor AM antenna.

• Incorrect selection between the

• Make connections

components.
• Incorrect operation of each component for

• Operate each component

during FM reception,
especially when a stereo
broadcast is received.
Continuous or intermittent
hissing noise during AM
reception, especially at
night.
No recording

• Tune in the desired station frequency.

correctly.

playback and recording.
Remote control unit does

• Batteries are not loaded or exhausted.

• Replace the batteries.

not operate.

• The remote sensor is obstructed.

• Remove the obstacle.

correctly.

Specifications
•

AMPLIFIER

SECTION

• Power output, stereo mode, 8 O, THD 0.06 %, 40 Hz_20 kHz ...............................................................
• Total harmonic distortion, 8 O, 100 W, 20 Hz~20 kHz .............................................................................
• Intermodutation distortion

2×105 W
0.04 %

60 Hz : 7 kHz= 4 : 1 SMPTE, 8 £"),100 W ....................................................................................................
• Input sensitivity, 47 k£")
Line ...........................................................................................................................................................

0.1%
200 mV

• Signal to noise ratio, IHF "A" weighted
Line ..............................................................................................................................................................

95 dB

° Frequency response
Line, 10 Hz~lO0 kHz .................................................................................................................................

+3 dB

• Output level
TAPENCR OUT, 2.2 k£") ...........................................................................................................................

200 mV

• Bass/Treble control, 100 Hz/lO kHz .........................................................................................................

±10 dB

•

FM TUNER

SECTION

• Tuning frequency range .................................................................................................................

87.5~108 MHz

• Usable sensitivity, THD 3%, S/N 30 dB ......................................................................................................
• 50 dB quieting sensitivity, mono/stereo

............................................................................................

• Signal to noise ratio, 65 dBf, mono/stereo

..............................................................................................

• Total harmonic distortion, 65 dBf, 1 kHz, mono/stereo

15 dBf
25.2/45.2 dBf
68/65 dB

...........................................................................

0.5/0.8%

• Frequency response, 25 Hz~14 kHz ..........................................................................................................

±3 dB

• Stereo separation,

35 dB

1 kHz ..............................................................................................................................

• Capture ratio ..................................................................................................................................................

4 dB

• IF rejection ratio ...........................................................................................................................................
•

AM TUNER

80 dB

SECTION

• Tuning frequency range .................................................................................................................

520~1710

• Usable sensitivity .....................................................................................................................................

kHz

800/_V/m

• Signal to noise ratio ......................................................................................................................................

40 dB

• Selectivity

25 dB

•

.....................................................................................................................................................

GENERAL

• Power supply ...................................................................................................................................

120 V~ 60 Hz

• Power consumption ........................................................................................................................................
• Dimensions (W ×H x D) ...........................................................
440 _138 _332 mm(17-3/8 x5-7/16
• Weight (Net) ................................................................................................................................

Note: Design and specifications are subject to change without notice for improvements.

2.5A
_ 13 inches)

9.0 kg(19.85 lbs)

_Sherwood
RX-4105
AM/FM STEREO RECEIVER

5707-04740-004-1

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SHERWOOD Receivers Manual L0908501

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