RCA STA-3850 Stereo Receiver User Manual
owner’s manual
STA-3850
STEREO RECEIVER
INTRODUCTION
Your RCA STA-3850 Stereo Receiver operates as the perfect
control center for your audio system. It combines 50 wattsper-channel of clean power with modern styling. It provides
connections for one tape deck, a turntable, a CD player, and
one other audio source, such as audio from a digital video disk
(DVD) player. You can also connect up to two pairs of
speakers (not supplied) to your receiver.
Additional features include:
WARNING: To reduce the risk of fire or shock hazard, do not expose
this product to rain or moisture.
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 PERSONNEL.
Digital-Synthesized Tuner — Precisely tunes to AM and FM
stations.
This symbol is intended to alert you to the
presence of uninsulated dangerous voltage
within the product’s enclosure that might be of
sufficient magnitude to constitute a risk of
electric shock. Do not open the product’s case.
60 Memory Locations — Let you store and recall the
frequencies for up to 30 AM and 30 FM stations.
Automatic Tuning — Searches for the next available AM/FM
station.
Tape Monitoring — Lets you listen to the actual recording as
you record, if your tape deck has a tape-monitoring feature.
Built-In Protection Circuits — Automatically turn off the
receiver to help avoid power surges or short circuit damage.
Remote Control — Lets you use a single remote control for the
receiver and other compatible components connected to the
receiver.
Note: The remote control requires two AA batteries (not
supplied).
We recommend you record the receiver’s serial number here.
The number is on the receiver’s back panel.
Serial Number:_____________________________________.
!
!
This symbol is intended to inform you that
important
operating
and
maintenance
instructions are included in the literature
accompanying this product.
Caution: Unplug the cassette deck's power cord when you will
not use the cassette deck for extended periods.
FCC NOTICE
This system complies with the limits for a Class B digital
device as specified in Part 15 of FCC Rules. These limits
provide reasonable protection against radio and TV
interference in a residential area. However, your equipment
might cause TV or radio interference even when it is operating
properly. To eliminate interference, you can try one or more of
the following corrective measures:
• Reorient or relocate the receiving antenna.
• Increase the distance between the equipment and the radio
or TV.
• Use outlets on different electrical circuits for the
equipment and the radio or TV.
Consult your local RadioShack store if the problem still exists.
Warning: Changes or modifications to this unit not expressly
approved by RadioShack could void the user’s authority to
operate the equipment.
© 1999 Tandy Corporation.
All Rights Reserved.
2
IMPORTANT SAFETY INSTRUCTIONS
Careful attention is devoted to quality standards in the manufacture of
your cassette deck, and safety is a major factor in its design. However,
safety is also your responsibility.
This section lists important information that will help you properly use
and enjoy your cassette deck. Read all the included safety and operating
instructions before using your cassette deck. Follow them closely, and
retain them for future reference.
Heed Warnings — Follow all warnings on the product and in the
operating instructions.
Cleaning — Unplug this product from the wall outlet before cleaning.
Use only a damp cloth for cleaning. Do not use liquid or aerosol
cleaners.
Attachments — Do not use attachments/accessories not
recommended by the product manufacturer, as they might create a
hazard.
Water and Moisture — Do not use this product near water (for
example, near a bathtub, washbowl, kitchen sink, or laundry tub; in a
wet basement; or near a swimming pool).
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. Follow the manufacturer's instructions for
mounting, and use a recommended mounting accessory.
Carts — Move the product on a cart carefully. Quick
stops, excessive force, and uneven surfaces may cause
the product/cart to overturn.
Ventilation — Slots and openings in the cabinet provide ventilation,
Objects and Liquids — 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.
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.
Damage Requiring Service — Unplug this product from the wall
outlet and refer servicing to qualified service personnel under the
following conditions:
• When the power-supply cord or plug is damaged.
• If liquid has been spilled or objects have fallen into the product.
• If the product has been exposed to rain or water.
• 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 normal operation.
• If the product has been dropped or damaged in any way.
• When the product exhibits a distinct change in performance.
Replacement Parts — When replacement parts are required, be sure
the service technician uses replacement parts specified by the
manufacturer or having the same characteristics as the original part.
Unauthorized substitutions may result in fire, electric shock, or other
hazards.
Safety Check — Upon completion of service or repairs to this
product, ask the service technician to perform safety checks to
determine that the product is in proper operating condition.
Wall or Ceiling Mount — The product should be mounted to a wall
or ceiling only as recommended by the manufacturer.
ensure reliable operation, and protect from overheating. Do not block
or cover these openings, and do not place the product on a bed, sofa,
rug, or other similar surface. Do not place the product in a built-in
installation such as a bookcase or rack unless it provides proper
ventilation as specified by the manufacturer.
Heat — The product should be situated away from heat sources such
as radiators, heat registers, stoves, or other products (including
amplifiers) that produce heat.
Power Sources — Operate this product using only the power source
Non-use Periods — Unplug the cassette desk’s power cord when you
indicated on its marking label. If you are not sure of your home's power
type, consult your product dealer or local power company.
will not use it for extended periods.
Polarization — This product is equipped with a polarized AC line
plug (a plug having one blade wider than the other). This plug will fit
in the power outlet only one way. This is a safety feature. If you cannot
insert the plug fully into the outlet, try reversing the plug. If the plug
still doesn't fit, contact your electrician to replace your obsolete outlet.
Do not defeat the safety purpose of the polarized plug. If you need an
extension, use a polarized cord.
Power-Cord Protection — Route power-supply cords so they are not
likely to be walked on or pinched by items placed on or against them,
paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit from the product.
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.
Overloading — Do not overload wall outlets, extension cords, or
integral convenience receptacles, as this can result in a risk of fire or
electric shock.
3
CONTENTS
Preparation ..........................................................................................................................................................................................
Positioning Speakers ...................................................................................................................................................................
Connecting Speakers ...................................................................................................................................................................
Preparing the Speaker Wires ................................................................................................................................................
Connecting Speakers to the A and B Terminals ...................................................................................................................
Connecting Program Sources ......................................................................................................................................................
Connecting a Turntable ........................................................................................................................................................
Connecting a CD Player .......................................................................................................................................................
Connecting a Cassette Deck .................................................................................................................................................
Connecting Another Audio Source ......................................................................................................................................
Connecting the Antennas ............................................................................................................................................................
AM Antennas .......................................................................................................................................................................
FM Antennas ........................................................................................................................................................................
Installing the Remote Control’s Batteries ...................................................................................................................................
Connecting to AC Power .............................................................................................................................................................
5
5
5
5
5
6
6
6
6
6
6
6
7
8
8
Operation ........................................................................................................................................................................................... 9
Using the Sleep Timer ................................................................................................................................................................. 9
Tuning the Radio ......................................................................................................................................................................... 9
Manual and Automatic Tuning ............................................................................................................................................ 9
Direct Tuning (Remote Control Only) ............................................................................................................................... 10
Memory Tuning ......................................................................................................................................................................... 10
Automatically Storing Stations .......................................................................................................................................... 10
Manually Storing a Station ................................................................................................................................................ 10
Tuning to a Station in Memory .......................................................................................................................................... 10
Adjusting Balance ..................................................................................................................................................................... 11
Muting the Receiver .................................................................................................................................................................. 11
Using Headphones ..................................................................................................................................................................... 11
Listening Safely ................................................................................................................................................................. 11
Cassette Deck Features .............................................................................................................................................................. 11
Using the Tape Monitor Button .......................................................................................................................................... 11
Recording a Program Source ............................................................................................................................................. 11
Using the Reset Button .............................................................................................................................................................. 11
Troubleshooting .............................................................................................................................................................................. 12
Care and Maintenance ................................................................................................................................................................... 13
The FCC Wants You to Know ................................................................................................................................................... 13
Specifications ................................................................................................................................................................................... 14
4
PREPARATION
Caution: Make all the necessary connections before you plug in
or turn on the receiver.
POSITIONING SPEAKERS
terminals and the other pair to the B SPEAKERS
terminals.
• Optimus, and other high-quality speakers have colorcoded speaker terminals (red for positive polarity and
black for negative polarity). Use these color-coded
terminals as a guide to help you properly connect the
speakers to the receiver.
Use 16-gauge (or larger) speaker wire for all speaker
connections, and consider possible speaker locations before
you decide how much speaker wire you need.
Preparing the Speaker Wires
Speaker (not supplied) placement can make a noticeable
difference in your system’s sound. The guidelines in this
section will help you choose the best locations. After you use
your receiver for a while, you might want to try different
locations for your speakers.
Bass response depends largely on speaker location. For strong
bass, place the speakers in the corners of the room. If you want
even stronger bass, place the speakers directly on the floor. If
the bass is too strong, move the speakers slightly away from
the corners of the room, or raise them 6 to 18 inches off the
floor. You can buy speaker stands at your local RadioShack
store.
The distance between the speakers should be about the same as
the distance between the normal listening point and the point
halfway between the speakers. If you place the speakers too
close together, you reduce the stereo separation. If you place
them too far apart, you reduce the bass effect and create a hole
in the middle of the sound.
Speaker wire consists of two conductors (individual wires)
encased in insulation and is usually color-coded or marked
with a ridge along one side so you can identify each conductor.
Use these markings as a guide to help you properly connect the
speakers to your receiver.
Follow these steps to prepare the speaker wires.
1. Cut the speaker wires to the necessary length.
2. Separate the wires about 4 inches on each end.
3
3. Using a wire stripper, carefully strip about /4 inch of
insulation from the end of each conductor.
4. Twist the end of each conductor to secure any loose wire
strands.
Caution: Twisting the end of each conductor helps prevent
a short circuit because stray speaker wire strands do not
touch other speaker terminals or any other receiver
terminals.
Connecting Speakers to the A and B Terminals
Note:
Most speakers have a tweeter dispersion angle of about 60
degrees. Ideally, your listening position should be just inside
the overlap area of the tweeter dispersion. You can angle the
speakers toward you for better stereo effect.
• Be sure you connect the receiver’s right and left positive
(+) and negative (–) terminals to the speaker’s
corresponding right and left positive (+) and negative (–)
terminals.
CONNECTING SPEAKERS
• Fully insert the speaker wires to ensure a good connection.
Leave extra wire at the back of the receiver so you do not
disconnect the wires when you move the receiver.
Follow these guidelines when you select and connect speakers.
• Only connect speakers that are rated at between 8 and 16
ohms.
• Be sure you properly connect all speakers.
• Do not connect two pairs of speakers to a single set of
terminals (A or B) at the same time. When you use two
pairs of speakers, connect one pair to the A SPEAKERS
Follow these steps to connect each speaker (A right or left or B
right or left).
1. Press open the receiver’s positive (+) red lever for the
speaker you want to connect and insert the ridged or colorcoded conductor’s end into the small hole. Release the
lever to secure the conductor.
5
turntable’s ground wire to the receiver’s
terminal.
GND screw
Connecting a CD Player
To connect a CD player to the receiver, connect the CD
player’s left and right output jacks to the receiver’s L and R CD
IN jacks.
Connecting a Cassette Deck
2. Press open the receiver’s negative (–) black lever for the
same speaker and insert the other conductor’s end into the
small hole. Release the lever to secure the conductor.
You can connect a cassette deck to the TAPE MONITOR jacks.
Connect the cassette deck’s output jacks to the PLAY jacks, and
connect the cassette deck’s input jacks to the REC jacks.
3. Connect the ridged or color-coded conductor’s loose end
to the speaker’s positive (+) terminal.
Connecting Another Audio Source
4. Connect the remaining loose conductor to the speaker’s
negative (–) terminal.
Connect the audio outputs of another audio source, such as the
audio from a laser disc player, TV, or VCR to the AUX jacks.
CONNECTING
PROGRAM SOURCES
Note: Use shielded audio cables with phono connectors for all
audio connections.
You can connect up to four external program sources to your
receiver.
Connecting a Turntable
Connect a turntable with a magnetic cartridge only. Some older
turntables use a ceramic-type cartridge that does not work with
this system.
Connect the turntable’s left and right cables to the receiver’s L
(left) and R (right) PHONO IN jacks. Then connect the
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CONNECTING THE ANTENNAS
In many areas, the supplied indoor AM loop and FM antennas
provide satisfactory reception.
AM Antennas
Assemble the supplied AM antenna’s base by swinging the
base in the direction of the arrow and inserting the antenna’s
bottom tabs into the base’s slot. If the receiver is in a rack or on
a shelf and there is no room for the AM loop antenna, use two
screws (not supplied) to mount the base on the wall or another
location as shown.
Attach the antenna wires from the AM loop antenna to the AM
and GND (ground) ANTENNA terminals.
For better FM reception, you can also use a rabbit-ear TV
antenna (for indoor use only) or an outdoor VHF TV antenna.
To connect the TV antenna to the receiver, you need a VHF/
UHF/FM splitter (not included). RadioShack stores carry a full
line of quality antennas and antenna connection accessories.
Warning: To prevent injury, read and follow all cautions and
warnings that accompany the outdoor antenna.
For the best radio reception, use an outdoor antenna. Follow
these steps to connect an outdoor FM antenna to the receiver
using 75Ω coaxial cable.
Place the antenna on a flat surface and rotate it for the best AM
reception.
Notes:
• Keep the AM loop antenna connected even when you use
another indoor antenna or an outdoor AM antenna.
• Ensure that the antenna does not touch the receiver or any
other metal object.
Note: If your antenna has 300Ω twin-lead cable, connect it to
the FM 300Ω ANTENNA terminals.
1. Disconnect the supplied FM antenna from the receiver’s
FM 300Ω ANTENNA terminal.
1
2. With a stripping tool, remove about 1 /2 inches of the 75Ω
cable’s outer insulation to expose the cable’s shielding.
Inner Insulation
• Do not place the antenna near a CD player, a personal
computer, or a TV set.
• If the wire between the AM loop antenna and your
receiver is too short, you can add extra wire, available at
your local RadioShack store.
Center Wire
Outer Insulation
You can also use an optional RadioShack shortwave antenna
kit (Cat. No. 278-758), which makes an excellent outdoor AM
antenna. Connect the outdoor AM antenna wire to the
receiver’s AM ANTENNA terminal as shown.
Shielding
3. Fold back the shielding from the inner insulation.
4. Remove about 1 inch of the inner insulation from around
the center wire.
5. Pull the shielding to one side. Connect the center wire to
the receiver’s FM 75Ω ANTENNA terminal. Twist the
shielding to secure any loose wire strands, and connect it
to the GND ANTENNA terminal.
FM Antennas
Note: For the best results, use 75-ohm coaxial cable to connect
an outdoor antenna to the receiver. Connect the supplied FM
antenna to the FM 300Ω ANTENNA terminal as shown then
extend it.
Shielding
FM
300Ω
Center
Wire
FM
75Ω
AM
GND
Caution: The cable’s shielding should only touch the GND
ANTENNA terminal.
7
Note: Grounding is not necessary for reception, but we
recommend it for better FM reception and to avoid damage
from lightning when you use an outdoor FM antenna. Use a
separate piece of thick polyvinyl insulated wire to connect the
GND ANTENNA terminal to an earth ground, such as a metal
cold-water pipe.
Warning: Never connect a wire to a gas pipe for grounding
since sparks might ignite the gas.
INSTALLING THE
REMOTE CONTROL’S BATTERIES
CONNECTING TO AC POWER
Warning: To prevent electric shock, do not use this polarized
plug with an extension cord, receptacle, or other outlet unless
you can fully insert the blades to prevent blade exposure.
Before you plug in the receiver’s power cord, double check all
other connections.
To power the receiver, plug the supplied power cord into a
standard AC outlet. The power cord’s plug is polarized and fits
only one way.
Cautions:
• Use only fresh batteries of the required size and
recommended type.
• Do not mix old and new batteries, different types of
batteries (standard, alkaline, or rechargeable), or
rechargeable batteries of different capacities.
• Dispose of old batteries promptly and properly. Do not
burn or bury them.
• Always remove old or weak batteries. Batteries can leak
chemicals that can damage electronic circuits.
Your remote control requires two AA batteries (not included)
for power. For the best operation and longest life, we
recommend alkaline batteries, available at your local
RadioShack store.
1. To remove the battery compartment cover, push the
compartment’s tab in the direction of the arrow, then lift
off the cover.
2. Place two fresh AA batteries in the compartment as
indicated by the polarity symbols (+ and –) marked inside.
3. Replace the battery compartment cover.
Note: If the remote’s range is reduced, replace the batteries.
8
The STAND BY indicator lights when the receiver is plugged
in but turned off.
Note: The receiver has a built-in circuit to protect it against
overheating or short circuits. If your receiver automatically
turns off (stand by mode), let it cool for several minutes. If the
receiver overheated, it should play normally when you turn it
back on. If there is a short circuit in your receiver, it will turn
off again when you turn on the receiver. If this happens, check
with your local RadioShack store for service.
OPERATION
Warning: To prevent possible hearing loss, turn VOLUME to
MIN before you turn on the receiver or change the program
source. After you turn on the receiver or change the program
source, adjust VOLUME to a comfortable listening level.
You can use the supplied remote control by pointing it at the
receiver’s front panel and pressing the desired button(s). Many
buttons on the remote control work the same as buttons on the
receiver’s front panel. Use these buttons exactly as you would
use the corresponding buttons on the receiver.
Follow these steps to use the receiver.
1. Press POWER to turn on the receiver. It takes about 5
seconds to hear sound.
2. Select the speakers. An indicator lights next to the A and/
or B to show which speakers are on.
7. When you finish using the receiver, press POWER to turn
it off.
USING THE SLEEP TIMER
The sleep timer lets you set the receiver to play for up to 90
minutes, then automatically turns off.
1. To set the timer, turn on the receiver then press SLEEP on
the remote control. The display dims and shows SLEEP
90 SLEEP.
2. To set the sleep timer for less than 90 minutes, repeatedly
press SLEEP to decrease the time by 10 minutes for each
press of the button. Once you select the time, the receiver
displays the program source. (SLEEP stays on the display
in small letters until automatic shut-off.)
If you connected speakers only to the A (or B)
SPEAKERS terminals, press SPEAKERS A (or B) to turn
on only those speakers. Do not press both SPEAKERS A
and B because doing so turns off all speakers even though
both indicators are on.
TUNING THE RADIO
If you connected speakers to both the A and B SPEAKERS
terminals, you can:
Your receiver has four types of electronic tuning — manual,
automatic, direct, and memory.
• Press SPEAKERS A or B to turn on either pair of speakers for a two-speaker effect.
Note: For weak signals, we recommend manual tuning.
• Press SPEAKERS A and B to turn on both pairs of
speakers for a four-speaker effect.
Manual and Automatic Tuning
Press SPEAKERS A and/or B to turn off all speakers so
you can listen privately with headphones (see “Using
Headphones” on Page 11).
3. Select a program source.
To tune to a radio station, see “Direct Tuning (Remote
Control Only)” on Page 10.
To listen to signals from the component connected to the
TAPE MONITOR jacks, press TAPE MONITOR so TAPE
MON appears.
To listen to a source other than the one connected to the
TAPE MONITOR jacks, press TAPE MONITOR so TAPE
MON disappears. Then press CD, PHONO, or AUX (CD,
PHONO, or AUX appears).
4. Turn VOLUME clockwise to increase the volume or
counterclockwise to decrease it. Or, you can use VOLUME
and
on the remote control.
5. To adjust the tone, turn BASS and TREBLE toward + or
–. To increase the high and low ranges of sound at low
volume, press LOUDNESS. (To turn off this feature, press
LOUDNESS again.)
6. To adjust the balance of sound between the left and right
speakers, see “Adjusting Balance” on Page 11.
3. To briefly see the time remaining, press SLEEP once.
Follow these steps to manually or automatically tune to the
stations.
1. Press FM or AM on the front panel (or on the remote
control) to select the desired band. The receiver tunes to
and displays the frequency last selected in that band.
2. If CH appears on the right side of the display, press MODE
to change the receiver to manual-tuning mode. MANUAL
briefly appears.
3. To manually select the next higher or lower frequency,
press TUNING UP or DOWN once. Or, hold down the
button to rapidly scan through the frequencies; release the
button to stop scanning.
To automatically search for the next higher or lower
station, briefly hold down TUNING UP or DOWN to begin
rapidly scanning through the frequencies. The receiver
searches up or down the band, stopping on the next strong
station.
Notes:
• TUNED appears when the received signal is strong.
• STEREO appears when the received FM broadcasts are
in stereo.
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• If you press TUNING UP at the top of the frequency
range or TUNING DOWN at the bottom of the frequency
range, the frequency at the opposite end of the range
appears.
Direct Tuning (Remote Control Only)
Follow these steps to directly enter a frequency.
1. Press FM or AM on the front panel (or on the remote
control) to select the desired band. The receiver tunes to
and displays the frequency last selected in that band.
2. Press DIRECT TUNING on the remote control. DIRECT
IN scrolls by, followed by AM – – – – kHz for AM or FM – –
– . – – MHz for FM. The first – flashes.
3. Enter the desired frequency using the remote control’s
number buttons.
Repeat these steps to automatically store stations in the other
band.
Manually Storing a Station
When the receiver automatically stores stations, some of them
might not be your favorites. Or, the 30-channel memory might
have filled up before the receiver reached your favorite station
at the high end of the frequency range. Follow these steps to
manually replace a station in memory.
1. Press FM or AM on the front panel (or on the remote
control) to select the desired band. The receiver tunes to
and displays the frequency last selected in that band.
2. If CH appears on the right side of the display, press MODE
to change the receiver to manual-tuning mode. MANUAL
briefly appears.
Notes:
3. Use either automatic or manual tuning to find the desired
station.
• If you press 1 to enter a FM frequency, such as 103.5,
10 automatically appears. If you also press the zero, the
frequency that appears would be 100.30.
4. Press MEMORY. MEMORY flashes on the display.
• The last zero always appears automatically in both FM
and AM frequencies.
• If you do not press a key within 5 seconds, the receiver
exits direct tuning. Start over at Step 2.
5. While MEMORY flashes, press TUNING UP or DOWN until
the desired memory channel number appears.
6. Press MEMORY again to store the station immediately. Or,
wait about 5 seconds and the station is automatically
stored in the selected channel.
Notes:
MEMORY TUNING
• If you store a frequency in a memory that already contains
a frequency, you replace the previous frequency.
Memory tuning lets you instantly tune to a stored frequency.
You can store up to 30 AM and 30 FM frequencies in the
receiver’s memory. The receiver automatically stores the first
30 stations found in the selected band into the memory. You
can also manually store a station into memory.
• If your receiver is disconnected from AC power for several
days, it loses all the stored frequencies.
Automatically Storing Stations
1. Press FM or AM on the front panel (or on the remote
control) to select the desired band. The receiver tunes to
and displays the frequency last selected in that band.
2. Hold down MEMORY for more than 2 seconds. MEMORY
and CH appear while the receiver steps through the
frequencies, beginning with the low end (87.5 MHz for
FM or 530 kHz for AM).
3. When the receiver finds a station, it stores in the first
memory channel, the CH number increments, and the
receiver looks for the next station. When the receiver finds
the thirtieth station or when it reaches the high end of the
frequency range, MEMORY disappears and the receiver
tunes to the lowest frequency station in the band.
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Tuning to a Station in Memory
1. Press FM or AM on the front panel (or on the remote
control) to select the desired band. The receiver tunes to
and displays the frequency last selected in that band.
2. If CH does not appear on the right side of the display, press
MODE to change the receiver to memory-tuning mode.
PRESET briefly appears.
and
3. Press TUNING UP or DOWN (or PRESET CALL
on the remote control) to tune to the next higher or
lower station stored in memory.
Or, press PRESET SCAN to scan through the stations in
memory. The receiver tunes to each station for about 5
seconds. When you hear the station you want to listen to,
press PRESET SCAN again.
You can also tune to a station in memory by using the
remote control’s number buttons to enter the channel
number. For single-digit channels, enter 0 first (for
example, enter 06 for Channel 6).
Notes:
• To improve the reception of weak FM stations, press FM
MODE. This reduces signal noise, but you hear monaural
instead of stereo sound.
• For stations with a weak signal, we recommend manual
tuning.
ADJUSTING BALANCE
The BALANCE control lets you adjust the sound balance
between the left and right speakers. If you properly position the
speakers and your listening area is centered between them, the
center control setting is usually best (see “Positioning
Speakers” on Page 5).
For an unusual speaker placement, press AM to select the AM
band or select any source and play a monaural audio source.
Turn BALANCE until you hear the sound coming equally from
each speaker when you are in the listening area.
MUTING THE RECEIVER
To temporarily mute the sound, press MUTING on the remote
control. The MUTE indicator on the receiver flashes. Press
MUTING again to restore the audio level. The MUTE indicator
turns off.
USING HEADPHONES
To listen with headphones (not supplied), insert the
1
headphones’ /4-inch plug into the receiver’s front panel
PHONES jack. To silence the speakers and listen with
headphones without disturbing others, press SPEAKERS A
and/or B so both indicators are off.
Listening Safely
To protect your hearing, note the following when using
headphones.
• Set the volume to its lowest setting before you begin
listening. After you begin listening, adjust the volume to a
comfortable level.
• Do not listen at extremely high volume levels. Extended
high-volume listening can lead to permanent hearing loss.
• Once you set the volume, do not increase it. Over time,
your ears adapt to the volume level, so a volume level that
does not cause discomfort might still damage your
hearing.
CASSETTE DECK FEATURES
You can connect a cassette deck to the receiver. Selecting
TAPE MONITOR lets you hear the playback from the cassette
deck you connected to the receiver’s TAPE MONITOR jacks.
Using the Tape Monitor
Button
Press TAPE MONITOR. TAPE MON appears, along with the last
program source you selected. You can hear the playback or
monitor a recording from the cassette deck you connected to
the receiver’s TAPE MONITOR jacks.
The TAPE MONITOR REC jacks continue to output the
previously selected sound source after you press TAPE
MONITOR.
To return to the previous source, press TAPE MONITOR again
so TAPE MON disappears.
Note: If you press TAPE MONITOR when that cassette deck is
neither playing nor recording, the receiver mutes the current
audio source. To hear the audio source, press TAPE MONITOR
so TAPE MON disappears.
Recording a
Program Source
The receiver sends the audio of the program source you
select— TAPE MONITOR, AUX, CD, FM/AM (tuner), or
PHONO —to the TAPE MONITOR REC jacks. The VOLUME
control does not affect the level of the signal going to the tape
decks.
When you record a program source using the cassette deck,
you hear the program source’s signal immediately after you
record it onto the tape, if the cassette deck you connected has a
three-head monitor function. (Be sure to read the owner’s
manual for your cassette deck.)
USING THE RESET BUTTON
If the receiver is subjected to a strong magnetic field or an
electric shock, it might operate erratically. If this happens, turn
off the receiver and press the rear panel RESET button with a
straightened paperclip or other pointed object.
Caution: Pressing RESET clears everything stored in the
receiver’s memory.
11
TROUBLESHOOTING
If the receiver is not working as it should, the following suggestions might help. If you follow the suggestions in this chart and the
receiver still does not work properly, contact your local RadioShack store for assistance.
Problem
Cause
Suggestion
Power does not turn on.
Power cord is disconnected.
Plug in the power cord.
No sound.
Incorrect connections.
Check and correct the connections.
The mute function is activated.
Press MUTING.
The volume is turned down.
Turn up the volume.
Speaker wires are disconnected.
Connect the speaker wires.
Neither set of speakers is selected.
Press SPEAKERS A or B.
Both SPEAKERS A and B are selected
when only one set of speakers is
connected.
Press SPEAKERS A or B to turn off the
speakers that are not connected.
TAPE MONITOR is selected.
Press TAPE MONITOR so TAPE MON
turns off.
One of the speaker wires or the input cord
is disconnected.
Check all connections.
BALANCE is set too far to one side.
Set BALANCE to the center position.
Station not correctly tuned.
Adjust tuning.
Antenna not connected.
Connect the antenna.
FM antenna still coiled or is not pointing
in the correct direction.
Stretch both ends of the antenna taut and
reposition the antenna.
AM loop antenna not pointing in the
correct direction.
Adjust the AM loop antenna.
Noise is coming from another electrical
appliance.
Try using an AC line noise filter to
reduce the noise.
Automatic tuning does not stop when
searching for stations.
Stations are too weak.
Use a better antenna.
Remote control does not work.
Batteries are weak or missing.
Install fresh batteries.
Poor angle or too great a distance from
the remote sensor window.
Use the remote control within the
effective range.
There is an obstacle between you and the
remote sensor window.
Change your position or remove the
obstacle.
A fluorescent light is shining on the
remote sensor window.
Turn off the light.
Sound from only one speaker.
High noise level.
12
CARE AND MAINTENANCE
To enjoy your RCA STA-3850 Stereo Receiver for a long
time:
• Keep the receiver dry. If it gets wet, wipe it dry
immediately.
• Use and store the receiver only in normal temperature
environments.
• Handle the receiver gently and carefully. Don’t drop it.
• Keep the receiver away from dust and dirt.
• Wipe the receiver with a damp cloth occasionally to keep
it looking new.
Modifying or tampering with the receiver’s internal
components can cause a malfunction and invalidate its
warranty.
This receiver has been manufactured to the specifications of
RadioShack and is covered by a limited warranty from
RadioShack. If your receiver is not operating as it should, take
it to your local RadioShack store or call 1-800-THE-SHACK
for assistance.
THE FCC WANTS YOU TO KNOW
Your receiver might cause radio or TV interference even when
it is operating properly. To determine whether your receiver is
causing the interference, turn off your receiver. If the
interference goes away, your receiver is causing it. Try to
eliminate the interference by:
• Moving your radio or TV away from the receiver
• Connecting your receiver to an outlet that is on a different
electrical circuit from the radio or TV
• Contacting your local RadioShack store for help
If you cannot eliminate the interference, the FCC requires that
you stop using your receiver.
13
SPECIFICATIONS
Amplifier
Power Output ................................................................................................................................. 50 Watts per Channel into 8 Ohms
From 40 to 20,000 Hz,
With No More than 0.5% Total Harmonic Distortion
Measured Pursuant to the Federal Trade Commission’s
Trade Regulation Rule on Amplifier Output Power Claims
Input Sensitivity/Impedance
Phono ....................................................................................................................................................................... 2.5 mV/47 kohms
CD, AUX, TAPE MONITOR ................................................................................................................................. 200 mV/47 kohms
Signal-to-Noise Ratio (IHF, Short-Circuited, A Network)
Phono .......................................................................................................................................................................................... 72 dB
CD, AUX, TAPE MONITOR ..................................................................................................................................................... 95 dB
FM Tuner
Frequency Range ...................................................................................................................................................... 87.5 to 108 MHz
Usable Sensitivity ............................................................................................................................................. Mono: 15 µV/m, EMF
Signal-to-Noise Ratio
Mono ........................................................................................................................................................................................... 68 dB
Stereo .......................................................................................................................................................................................... 63 dB
Distortion ............................................................................................................................................................ Stereo: 0.5% (1 kHz)
Alternate Channel Selectivity .................................................................................................................................... 45 dB (400 kHz)
Stereo Separation ........................................................................................................................................................... 35 dB (1 kHz)
AM Tuner
Frequency Range ....................................................................................................................................................... 530 to 1720 kHz
Sensitivity (IHF, Loop Antenna) ......................................................................................................................................... 500 µV/m
Selectivity ................................................................................................................................................................................... 25 dB
Signal-to-Noise Ratio ................................................................................................................................................................. 35 dB
General
Power Requirements ............................................................................................................................................ 120 Volts AC, 60 Hz
Power Consumption ............................................................................................................................................................. 120 Watts
Dimensions (HWD) ................................................................................................................................... 5 /8 × 16 /16 × 12 /4 Inches
(130 × 420 × 310 mm)
1
9
1
Weight ............................................................................................................................................................................. 14 lb (6.3 kg)
Specifications are typical; individual units might vary. Specifications are subject to change and improvement without notice.
14
NOTES
15
Limited Two-Year Warranty
This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for two (2) years from the date of purchase from RadioShack companyowned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,
INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of incidental or consequential damages, so the above limitations or exclusions may not apply to you.
In the event of a product defect during the warranty period, take the product and the RadioShack
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, unless otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and products, and products on which a refund is made, become the property of RadioShack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the remainder of the
original warranty period. You will be charged for repair or replacement of the product made after the
expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
We Service What We Sell
04/99
RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
31-5002
08A99
Printed in China
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