Your Optimus STAV-3680 Audio/Video Receiver is the perfect control center for
your audio/video system. It combines 500 watts total Pro Logic Surround Sound
power with five equal-power discrete amplifiers and provides connections for
one tape deck, one VCR, two more tape decks or audio/video playback
sources, a turntable, a CD player, and a video monitor.
Digital-Synthesized Tuner
Multi-J og Tuning
30 Memory Locations
Subwoofer Output
Tape Monitoring
Built-In Protection Circuits
Y our receiver also has special sound options.
Dolby Pro Logic ‘ Surround Sound
delivers movie theater sound for audio/video programs (especially those encoded with Dolby Surround Sound signals).
sound field than ordinary playback.
Studio Effect
recording studio, adding extra richness to your music.
Dolby 3CH Logic
provides a wider
simulates the ambiance of a
5-D Theater
provides
clear dynamic sound effects by sending audio signals to the rear channel to
simulate stereo sounds.
Additional features include:
Precisely tunes to AM and FM stations.
Offers you a simple tuning method for either memorized stations or the entire
frequency range.
Let you store and recall the frequencies for up to 30 AM/FM stations.
Lets you easily connect an amplified subwoofer that delivers the very low fre-
quency bass sounds, bringing out the richness and depth of music plus the full
impact of motion-picture special effects for sound you can actually feel.
Lets you listen to the actual recording as you record, if your tape deck has a
tape-monitoring feature.
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.
The remote control requires two AA batteries (not supplied).
Note:
.
We recommend you rec ord the rec eiver’s serial num ber here. The serial num ber is on
the receiver’s back panel.
Serial Number:_____________________________________________
Note to the Cable TV System Installer:
This reminder is provided t o call the CATV system installer ’s attention to article 820-40 of the National E lectrical Code 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.
Dolby, Pro Logic, and the double-D symbol ( ) are trademarks of Dolby Laboratories Licensing Corporation.
Manufactured under license from Dolby Laboratories Licensing Corporation.
1997 Tandy Corporation.
RadioShack and Optimus are registered trademarks used by Tandy Corporation.
All Rights Reserved.
3
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(
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IMPORTANT SAFETY INSTRUCTIONS
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This receiver is made and tested to meet exacting
safety stand ards. It meets both UL and FCC requirements.
Warning
: To reduce the risk of fire or
shock hazard, do not expose this p roduct
to rain or moisture.
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
: TO REDUCE THE RISK OF
!
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED PERSONNEL.
This sym bol is inte nded to al ert y ou to the
presence of uninsulated dangerous voltage
withi n th e sy stem’ s en cl os ure t ha t migh t be
of sufficient magnitude to constitute a risk
of el ectric shock. Do not open the system’s
case.
This symbol is intended to inform you that
important operating and maintenance in-
!
structions are included in the literature accompanying this system.
CAUTION
Power Lines
power li ne s.
Nonuse Periods
when you will not use it for extended periods.
Outdoor Antenna Grounding
tenna or cable system is connected to the receiver,
ground the antenna or cable system so as to provide
some protection against voltage surges and built-up
static charges. Article 810 of the National Electrical
Code, ANSI/NFPA 70, provides information about
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 antennadischarge unit, connection to grounding electrodes,
and requirements for the grounding electrode. See the
example below.
NEC -- National Electrical Code
— Locat e an outdo or an te nn a awa y fr o m
— Unplug the receiver’s power cord
— If an outside an-
Antenna
Lead-In
Wire
Ground Clamp
Antenna
Discharge U nit
Electric
Service
Equipment
(NEC Section 810-20)
Grounding Conductor
(NEC Section 810-21)
Grounding Clamps
Power Service G rounding
Electrode System
NECArticle 250,Part H
Careful attention is devoted to quality standards in the manufacture of your receiver, and safety i
a major factor in its design . However, safety is also your responsib ility.
This section lists important information that will help you properly use and enjoy your receiver an
accessories. Read all the included safety and operating instructions before using your receiver. Fol
low them closely, and retain them for future reference.
Heed Warnings
Cleaning
cleaning. Do not use liquid or aerosol cleaners.
Attachments
turer, as they might create a hazard.
Water and Moisture
kitchen sink, or laundry tub; in a wet basement; or near a swimming pool).
Accessories
product may fal l, causing serious injury to a child or adult, and serious dam age to the product. Us
only with a cart , stand, tripod, bracket, or table recommended by the manufacturer or sold with th
product. Follow the manufacturer's instructions for mounting, and use a recommended mountin
accessory.
Power Sources
If you are not sure of your home's power type, consult your product dealer or local power company
Polariz ation
wider than the other). This plug will fit in the power outlet only one way. This is a safety feature. I
you cannot insert the plug fully into the outlet, try reversing the plug. If the plug still doesn't fit, con
tact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polar
ized plug. If you need an extension, use a polarized cord.
Power-Cord Protection
pinched by items placed on or against them, paying particular attention to cords at plugs, conve
nience receptacles, and the point where they exit from the product.
Lightning
tended an d unus ed fo r lo ng per i od s of t im e, un plug it fro m t he wall ou t le t and di sco nn ect the an te n
na or cabl e s yst e m. This w il l prev en t d am ag e to t h e p rodu ct du e t o li gh t ni ng an d p ow er- l ine s ur g es
Overloading
as this can result in a risk of fire or electric shock.
Objects and Liquids
may to uch da nger ou s volt ag e poin ts or short out pa rts that coul d resu lt in a fire or ele ctric sh ock
Never spill liquid of any ki nd on the product.
Servicing
expo se yo u to dangero us vo lt age or oth er hazard s . R efe r all servic ing to qu al ifi ed servic e person
nel.
Damage Requiring Service
ified s ervice personne l under the follo wing conditions:
• When the power- s upply cord or plug is damaged.
• If liquid has been spilled or objects have fallen into the product.
• If the product h as been exposed to rain or water.
• If the product does not operate normally by following the operating instructions. Adjust onl
those controls that are covered by the operating instructions, as an improper adjustment o
other controls may result in damage and will often require extensive work by a qualified techni
cian to restore the product to normal oper ation.
• If the product h as been dropped or damaged in any way.
• When the product exhibits a distinct change in performance.
Replacement Parts
replacement parts spe c ified by the manufacturer or having the same characteristics as the origina
part. Unauthorized substitutions may result in fire, electric shock, or other hazards.
Safety Check
to perform safety checks to determine that the product is in proper operating condition.
Wall or Ceiling Mount
by the manufacturer.
Heat
— The product should be situated away from heat sources suc h as radiators, heat registers
stoves, or other products (including amplifiers) that produce heat .
— Follow all warning s on the product and in the o peratin g instructions.
— Unplug thi s produc t from the w all outl et bef ore clea ning. U se on ly a dam p cloth fo
— Do not use attachments/accessori es not recom m ended by the product manufac
— Do not use th is pr oduc t near water (for examp le, near a b atht ub, w ashbo wl
— Do not place this p roduct o n an unstable cart, stand, tripod, bracket, or table . Th
Carts
— Move the product on a cart carefully. Quick stops, excessive force, an
uneven surfaces may cause the product/cart to overturn.
Ventilation
able operation, and protect from overheating. Do not block or cover these open
ings, and do not place the product on a bed, sofa, rug, or other similar surface. D
not pl ace the product in a built-in bookcase or rack unless it provides proper ven
tilat ion as specified by the manufacturer.
— Operate th is prod uc t usin g onl y the p ower sourc e ind icated on its marki ng la bel
— This product is equipped with a polarized AC line plug (a plug having one blad
— For added pr ot ec t io n for th is product du ring a lightning storm, o r w he n it is lef t un at
— Do not overloa d wall ou tle ts, ex tensio n cor ds, or in teg ral conv enie nce r ecepta cles
— Do not attempt to service this product yourself, as opening or removing covers ma
— Upon completion of service or repairs to this product, ask the service technicia
— Slots and openings i n t he c ab in et prov id e ve ntilati on , ensure r e li
— Route power-supply cords so they are not likely to be walked on o
— Never push objects of any kind into this product through openings, as the
— Unplug this product from the wall outlet and refer serv icing to qual
— When replacement parts are required, be sure the service technician use
— The produc t shou ld be mounte d to a wall or cei ling only as rec ommen de
Caution: Make all the necessary connections before you plug in or turn on the receiver.
Positionin g Sp e akers
L
Halfway Point
b
Person in Listening Area
• Surround speakers generally sound
best if you position them above ear
level.
• To avoid interference with the picture
on a nearby TV, use magnetically
shielded speaker systems. This is particularly important for the center
speaker since it is usually located
closest to the TV .
Between Speak
a=b
R
Where you place your speakers (not supplied) 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 sam e 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.
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.
To position your speakers for surround sound, place the A or B (front) speakers
at the front of your listening area, and place the surround speakers (rear) behind
or to the sides of the listening point (see “Using Advanced Sound Options” on
Page 21). Also, place the center speaker above, below, or behind the TV .
Sound might not appear to coincide with the picture if you place the center
speaker beside the TV.
TV
Front Left
Speaker
Rear Left
Speaker
Center Speaker
Front
Listening
Area
Rear
Front Right
Speaker
Rear Right
Speaker
Preparing Your Receiver
onnecting Speakers
Follow these guidelines when you select
and connect speakers.
• Be sure you properly connect all
speakers.
• Do not c onnect two pairs of speakers
to a single set of terminals (A or B) at
the same time. When you use two
pairs of speakers, conne ct one set to
the Speakers A jacks and one set to
the Speakers B jacks.
• Optimus and other high-quality speakers have color-coded 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 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.
Wire Strands
Conductor
Conductor
1. Cut the speaker wires to the necessary length.
2. Separate the wires about 4 inches on each end.
3. Using a wire stripper, carefully strip about
end of each conductor.
4. Twist the end of each exposed wire to secure any loose strands.
Wire Strands
3
/4 inch of insulation from the
Setting the Impedance Selector Switch
Before connecting speakers, check your speaker system’s impedance (see
IMPED-
your speaker system’s specifications). Normally it is 8W. If it is, leave the
ANCE SELECTOR
switch set to
impedance, set the switch to
8W~16W/ SPEAKER
6Ω~16Ω/SPEAKER
L
R
A
B
RL
.
CAUTION:
A
CAUTION: SEE INSTRUCT MANUAL
B
. If your speaker system has 6W
SPEAKER IMPEADANCE
816
/SPEAKER
/SPEAKER
6 16
8 16
/SPEAKER
IMPEDANCE
7
Preparing Your Receiver
-
A
B
A
B
R
L
RL
FRONT SPEAKERS
L
R
PRE OUT
SUB
WOOFER
CENTER
SPEAKER
REAR
SPEAKERS
L
R
AUDIO
IN
PRE OUT
CENTER
AUDIO
IN
Connecting the A and B Speakers
Note:
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.
Follow these steps to connect the right speaker to the receiver’s right
SPEAKERS A
Center Channel
Power Amplifier
terminals.
Amplified
Subwoofer
RightFront A SpeakersLeft
RightFront B SpeakersLeft
Center Speaker
Surround
Speakers
FRONT
LeftRight
1. Lift the receiver’s
FRONT SPEAKERS A R
(+) red lever and insert the ridged
or color-coded conductor’s end into the small hole. Pull back the lever to
secure the conductor .
2. Lift the receiver’s
FRONT SPEAKERS A R (–
) black lever and insert the other
conductor’s end into the small hole. Pull back the lever to secure the con
ductor.
speaker’s positive (+) terminal.
3. Connect the ridged or color-coded conductor’s loose end to the right
4. Connect the remaining loose conductor to the right speaker’s negative (–)
terminal.
Repeat Steps 1 through 4 to connect the left speaker to the receiver’s left
SPEAKERS A
Repeat this entire process to connect a second pair of speakers to the
SPEAKERS B
terminals.
FRONT
terminals.
FRONT
Preparing Your Receiver
Connecting Surround-Sound Speakers
You can connect a pair of speakers to the receiver’s
for surround-sound programs. Follow the steps in “Connecting the A and B
Speakers.”
REAR SPEAKERS
terminals
Connecting the Center Speaker
The center speaker gives additional ambience to surround sound. Connect the
center speaker to the
ing the A and B Speakers.”
CENTER SPEAKER
terminals. Follow the steps in “Connect-
Connecting Center Ch annel and Subwoofer Amplifiers
To increase th e center channel’s output power, you can connect an amplifier to
the
CENTER
Y our receiver includes a line-level subwoofer output. Connecting a subwoofer to
your system dramatically extends bass response for incredible richness and
depth. When you listen to surround-sound programs, a subwoofer enhances
your home theater experience by realistically re-creating the rumble of an earthquake, the bone-jarring percussion of a cannon, and more. To use the subwoofer output, simply connect it to an amplified subwoofer’s line-level input or to
an amplifier to which you have connected a subwoofer.
RadioShack stores sell a variety of suitable subwoofers and amplifiers.
jack. Then connect the center channel speaker to the amplifier.
9
Preparing Your Receiver
VIDEO
O
Connecting Program Sources
Use shielded audio cables with phono
connectors for all audio connections.
You can connect up to six external program sources to your receiver.
TO MONITOR TV
IN
IN
PLAY
MONITOR
SIGNAL GND
R
LINE
RECPLAY
L
R
REC
INPUTOUTPUT
TAPE2
L
OUT
OUT
REC
L
R
IN
IN
IN
LD/
VCR/
SAT
TAPE 1
R
L
R
R
PLAY
INOUT
DVD/
TV
R
L
L
L
LINE
RECPLAY
L
R
REC
INPUTOUTPUT
R
OUTPUT
CONTROL
OUT
INOUTININ
L
L
R
IN
R
CD
PHONO
L
L
R
R
L
L
R
L
PLAY
VIDE
L
R
R
Note:
If you place the c assette deck directly above, below, or to the left of the
receiver, the receiver could interfere with
the cassette deck’s operation. If possible, position the cassette deck to the
right of the receiver or locate it away
from the receiver.
CD
TurntableCD PlayerCassette DeckCassette Deck
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 left and right
PHONO
jacks. Then connect the turntable’s ground wire to the receiver’s
GND
termi nal.
SIGNAL
Connecting Cassette Deck(s)
Y ou can connect cassette decks to the
Connect the cassette deck’s output jacks to the
PLAY
jacks, and connect the cassette deck’s input jacks to the
(audio) or
TAPE 2 OUT REC
jacks.
VCR/TAPE 1
VCR/TAPE 1 IN
and the
You can connect a third cassette deck (for playback only) to the
dio) jacks.
TAPE 2 MONITOR
(audio) or
TAPE 2 IN
VCR/TAPE 1 OUT
LD/SAT IN
jacks.
(au-
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
CD
jacks.
Preparing Your Receiver
TV Monitor
LD Play er
LD Player
VCR
PHONO
TAPE2
MONITOR
CD
VCR/
TAPE 1
VIDEO
OUT
SIGNAL GND
REC
PLAY
L
R
L
R
INOUTININ
CONTROL
OUT
IN
DVD/
TV
IN
TO MONITOR TV
VIDEO
IN
IN
INOUT
LD/
SAT
IN
OUT
IN
L
R
RECPLAY
AUDIO
REC
PLAY
INPUTOUTPUT
VCR
VIDEO
IN
OUT
VIDEO
IN
V
L
R
AUDIO
OUT
VIDEO
OUT
R
L
V
L
R
AUDIO
OUT
VIDEO
OUT
R
L
V
L
R
R
L
R
L
L
R
V
V
V
V
v
L
R
v
L
R
v
Connecting Video Sourc es
Note:
If your VCR is monaural, use a Yadapter (available at your local RadioShack store) to connect the VCR’s
audio output to both the
and R audio in-
L
puts on the receiver.
If you connect three video sources such as VCRs, laser disc players, or DVD
(digital video disc) players to your receiver, you can use the receiver to select
each video source. You can also use the receiver to easily record from the video
sources to the source connected to
VCR/TAPE 1
.
Connect phono cables from a VCR’s audio outputs to the receiver’s
or
IN
LD/SAT IN
VCR/TAPE 1 OUT
Connect video cables from each video source’s video outputs to the receiver’s
VCR/TAPE 1 VIDEO IN
receiver’s
You can connect a third video source to the
source’s video output to the receiver’s
dio outputs to the receiver’s
(audio) jacks. Then connect phono cables from the receiver’s
(audio) jacks to the VCR’s audio input jacks.
or
LD/SAT VIDEO IN
VCR/TAPE 1 VIDEO OUT
DVD/TV IN
jacks. Then connect video cables from the
jack to the VCR’s video input.
DVD/TV IN
DVD/TV VIDEO IN
jacks. Connect the
jack, and the source’s au-
(audio) jacks.
VCR/TAPE 1
Connecting a Video Monito r
The monitor (or TV with baseband video input) you connect to the
minal can monitor any source you connect to the receiver’s
or
DVD/TV
MONITOR TV
input jacks. Connect a video cable from the receiver’s
jack to the monitor’s video input.
VIDEO OUT
VCR/TAPE 1, LD/SAT
VIDEO OUT TO
ter-
,
10
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