Optimus Stereo Receiver STAV3680 User Manual

Cat. No. 31-3039  
Audio/Video  
Receiver  
STAV-3680  
DOLBY SURROUND  
P R O • L O G I C  
STAV-3680 AUDIO/VIDEO RECEIVER  
STAND BY  
DOLBY  
PRO LOGIC  
VCR  
TAPE 2  
SFC  
MODE  
5-D  
THEATER  
OSR  
TAPE 1  
DVD/TV  
LD/SAT  
CD  
TUNER PHONO MONITOR  
LOUDNESS  
POWER  
VOLUME  
BASS  
BALANCE  
RETURN  
FM MONO CLASS  
MEMORY FM/AM  
SELECT  
ENTER  
MULTI  
JOG  
TREBLE  
PHONES  
5–CHANNEL  
EQUAL POWER OUTPUT  
SPEAKERS  
L
R
MIN  
MAX  
A
B
Owner’s Manual  
Please read before using this equipment.  
 
IMPORTANT SAFETY INSTRUCTIONS  
This receiver is made and tested to meet exacting  
safety standards. It meets both UL and FCC require-  
ments.  
Careful attention is devoted to quality standards in the manufacture of your receiver, 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 receiver and  
accessories. Read all the included safety and operating instructions before using your receiver. Fol-  
low them closely, and retain them for future reference.  
Warning: To reduce the risk of fire or  
shock hazard, do not expose this product  
to rain or moisture.  
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 manufac-  
turer, as they might create a hazard.  
CAUTION  
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).  
RISK OF ELECTRIC SHOCK.  
!
DO NOT OPEN.  
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.  
CAUTION  
: TO REDUCE THE RISK OF  
ELECTRIC SHOCK, DO NOT REMOVE  
COVER OR BACK. NO USER-SERVICE-  
ABLE PARTS INSIDE. REFER SERVICING  
TO QUALIFIED PERSONNEL.  
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, ensure reli-  
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. Do  
not place the product in a built-in bookcase or rack unless it provides proper ven-  
tilation as specified by the manufacturer.  
This symbol is intended to alert you to the  
presence of uninsulated dangerous voltage  
within the system’s enclosure that might be  
of sufficient magnitude to constitute a risk  
of electric shock. Do not open the system’s  
case.  
Power Sources — Operate this product using only the power source indicated on its marking label.  
If you are not sure of your home's power type, consult your product dealer or local power company.  
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, 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.  
This symbol is intended to inform you that  
important operating and maintenance in-  
!
structions are included in the literature ac-  
companying this system.  
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, conve-  
nience 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 unat-  
tended and unused for long periods of time, unplug it from the wall outlet and disconnect the anten-  
na or cable system. This will prevent damage to the product due to lightning and power-line surges.  
CAUTION  
Power Lines — Locate an outdoor antenna away from  
Overloading — Do not overload wall outlets, extension cords, or integral convenience receptacles,  
as this can result in a risk of fire or electric shock.  
power lines.  
Nonuse Periods — Unplug the receiver’s power cord  
when you will not use it for extended periods.  
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.  
Outdoor Antenna Grounding — If an outside an-  
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 antenna-  
discharge unit, connection to grounding electrodes,  
and requirements for the grounding electrode. See the  
example below.  
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 person-  
nel.  
Damage Requiring Service — Unplug this product from the wall outlet and refer servicing to qual-  
ified 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 techni-  
cian to restore the product to normal operation.  
Antenna  
Lead-In  
Wire  
If the product has been dropped or damaged in any way.  
When the product exhibits a distinct change in performance.  
Ground Clamp  
Antenna  
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.  
Discharge Unit  
(NEC Section 810-20)  
Electric  
Service  
Equipment  
Grounding Conductors  
(NEC Section 810-21)  
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.  
Grounding Clamps  
Power Service Grounding  
Electrode System  
(NEC Article 250, Part H)  
Wall or Ceiling Mount — The product should be mounted to a wall or ceiling only as recommended  
by the manufacturer.  
NEC -- National Electrical Code  
Heat — The product should be situated away from heat sources such as radiators, heat registers,  
stoves, or other products (including amplifiers) that produce heat.  
 
3
Contents  
Preparing Your Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Positioning Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Connecting Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Connecting Program Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Connecting the Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Using One Remote Control for More than One Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Installing the Remote Control’s Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Using the AC Power Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Connecting to AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Balance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Loudness Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Muting the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Using Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Tuning the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Using FM Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Cassette Deck/VCR Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Using the VCR/TAPE 1 and TAPE 2 Monitor Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Recording a Program Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Dubbing a Cassette Tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Playing and Recording Video Tapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
Using Advanced Sound Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Sound Mode Adjustments (Remote Control Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Using the Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Returning Controls to Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
The FCC Wants You to Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27  
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28  
Index to Features by Control Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30  
 
4
Preparing Your Receiver  
Caution: Make all the necessary connections before you plug in or turn on the receiver.  
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 dif-  
ferent locations for your speakers.  
Positioning Speakers  
a
L
R
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.  
Halfway Point  
Between Speake  
b
a=b  
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.  
Person in Listening Area  
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 dis-  
persion. You can angle the speakers toward you for better stereo effect.  
• 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 par-  
ticularly important for the center  
speaker since it is usually located  
closest to the TV.  
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  
Front Right  
Speaker  
Center Speaker  
Front  
Listening  
Area  
Rear  
Rear Left  
Speaker  
Rear Right  
Speaker  
 
5
Preparing Your Receiver  
Connecting Speakers  
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 guidelines when you select  
and connect speakers.  
• Be sure you properly connect all  
speakers.  
Follow these steps to prepare the speaker wires.  
• 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 set to  
the Speakers A jacks and one set to  
the Speakers B jacks.  
Wire Strands  
Conductor  
• Optimus and other high-quality speak-  
ers have color-coded speaker termi-  
nals (red for positive polarity and  
black for negative polarity). Use these  
color-coded terminals as a guide to  
help you properly connect the speak-  
ers to the receiver.  
Wire Strands  
Conductor  
1. Cut the speaker wires to the necessary length.  
2. Separate the wires about 4 inches on each end.  
• Use 16-gauge (or larger) speaker wire  
for all speaker connections, and con-  
sider possible speaker locations be-  
fore you decide how much speaker  
wire you need.  
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 exposed wire to secure any loose strands.  
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  
8W~16W/ SPEAKER  
. If your speaker system has 6W  
switch set to  
6
~16 /SPEAKER  
.
impedance, set the switch to  
CAUTION: SPEAKER IMPEADANCE  
16  
R
L
8
/SPEAKER  
A
B
A
B
CAUTION: SEE INSTRUCT MANUAL  
6
8
16 /SPEAKER  
16 /SPEAKER  
R
L
IMPEDANCE  
SELECTOR  
FRONT SPEAKERS  
 
6
Preparing Your Receiver  
Connecting the A and B Speakers  
Note: Be sure you connect the re-  
ceiver’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 FRONT  
SPEAKERS A terminals.  
Right  
Front A Speakers  
Front B Speakers  
Left  
Right  
Left  
Center Speaker  
Center Channel  
Power Amplifier  
CENTER  
AUDIO  
IN  
PRE OUT  
L
R
R
PRE OUT  
SUB  
AUDIO  
IN  
L
REAR  
CENTER  
SPEAKER  
WOOFER  
SPEAKERS  
R
L
A
B
A
B
Amplified  
Subwoofer  
R
L
FRONT SPEAKERS  
Surround  
Speakers  
Right  
Left  
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.  
3. Connect the ridged or color-coded conductor’s loose end to the right  
speaker’s positive (+) terminal.  
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 FRONT  
SPEAKERS A terminals.  
Repeat this entire process to connect a second pair of speakers to the FRONT  
SPEAKERS B terminals.  
 
7
Preparing Your Receiver  
Connecting Surround-Sound Speakers  
You can connect a pair of speakers to the receiver’s REAR SPEAKERS terminals  
for surround-sound programs. Follow the steps in “Connecting the A and B  
Speakers.”  
Connecting the Center Speaker  
The center speaker gives additional ambience to surround sound. Connect the  
center speaker to the CENTER SPEAKER terminals. Follow the steps in “Connect-  
ing the A and B Speakers.”  
Connecting Center Channel and Subwoofer Amplifiers  
To increase the center channel’s output power, you can connect an amplifier to  
the CENTER jack. Then connect the center channel speaker to the amplifier.  
Your 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 earth-  
quake, the bone-jarring percussion of a cannon, and more. To use the sub-  
woofer 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.  
 
8
Preparing Your Receiver  
You can connect up to six external program sources to your receiver.  
Connecting Program Sources  
VIDEO  
TO MONITOR TV  
OUT  
CONTROL  
Use shielded audio cables with phono  
connectors for all audio connections.  
IN  
OUT  
OUT  
IN  
IN  
IN  
OUT  
IN  
VIDEO  
OUT  
PLAY REC  
IN  
IN  
IN  
IN  
IN  
L
L
L
R
R
R
LD/  
SAT  
VCR/  
TAPE 1  
DVD/  
TV  
TAPE2  
CD  
PHONO  
MONITOR  
SIGNAL GND  
L
L
R
R
LINE  
LINE  
REC  
PLAY  
PLAY  
REC  
PLAY  
PLAY  
OUT PUT  
L
L
L
R
R
R
REC  
REC  
OUTPUT INPUT  
OUTPUT INPUT  
CD  
Turntable  
CD Player  
Cassette Deck  
Cassette 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  
SIGNAL  
jacks. Then connect the turntable’s ground wire to the receiver’s  
terminal.  
GND  
Connecting Cassette Deck(s)  
VCR/TAPE 1  
TAPE 2 MONITOR  
jacks.  
You can connect cassette decks to the  
and the  
Note: If you place the cassette deck di-  
rectly above, below, or to the left of the  
receiver, the receiver could interfere with  
the cassette deck’s operation. If possi-  
ble, position the cassette deck to the  
right of the receiver or locate it away  
from the receiver.  
VCR/TAPE 1 IN  
TAPE 2 IN  
(audio) or  
VCR/TAPE 1 OUT  
Connect the cassette deck’s output jacks to the  
PLAY  
jacks, and connect the cassette deck’s input jacks to the  
TAPE 2 OUT REC  
(audio) or  
jacks.  
LD/SAT IN  
You can connect a third cassette deck (for playback only) to the  
dio) jacks.  
(au-  
Connecting a CD Player  
To connect a CD player to the receiver, connect the CD player’s left and right  
CD  
output jacks to the receiver’s  
jacks.  
 
9
Preparing Your Receiver  
Connecting Video Sources  
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.  
Note: If your VCR is monaural, use a Y-  
adapter (available at your local Ra-  
dioShack store) to connect the VCR’s  
audio output to both the L and R audio in-  
puts on the receiver.  
VIDEO  
TO MONITOR TV  
OUT  
CONTROL  
IN  
OUT  
IN  
IN  
OUT  
IN  
VIDEO  
OUT  
IN  
IN  
IN  
PLAY REC  
IN  
IN  
OUT  
IN  
L
L
R
R
DVD/  
TV  
TAPE2  
LD/  
SAT  
VCR/  
TAPE 1  
CD  
PHONO  
MONITOR  
SIGNAL GND  
L
VIDEO  
AUDIO  
AUDIO  
OUT  
AUDIO  
OUT  
VIDEO  
OUT  
VIDEO  
OUT  
PLAY  
REC  
VIDEO  
IN  
IN  
OUT  
L
L
L
R
R
R
PLAY  
REC  
OUTPUT INPUT  
VCR  
TV Monitor  
LD Player  
VCR  
LD Player  
Connect phono cables from a VCR’s audio outputs to the receiver’s VCR/TAPE 1  
IN or LD/SAT IN (audio) jacks. Then connect phono cables from the receiver’s  
VCR/TAPE 1 OUT (audio) jacks to the VCR’s audio input jacks.  
Connect video cables from each video source’s video outputs to the receiver’s  
VCR/TAPE 1 VIDEO IN or LD/SAT VIDEO IN jacks. Then connect video cables from the  
receiver’s VCR/TAPE 1 VIDEO OUT jack to the VCR’s video input.  
You can connect a third video source to the DVD/TV IN jacks. Connect the  
source’s video output to the receiver’s DVD/TV VIDEO IN jack, and the source’s au-  
dio outputs to the receiver’s DVD/TV IN (audio) jacks.  
Connecting a Video Monitor  
The monitor (or TV with baseband video input) you connect to the VIDEO OUT ter-  
minal can monitor any source you connect to the receiver’s VCR/TAPE 1, LD/SAT,  
or DVD/TV input jacks. Connect a video cable from the receiver’s VIDEO OUT TO  
MONITOR TV jack to the monitor’s video input.  
 
10  
Preparing Your Receiver  
In many cities, the supplied indoor AM loop and FM antennas provide satisfac-  
tory reception.  
Connecting the Antennas  
AM Antennas  
Antenna  
Tabs  
Assemble the included 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. Then at-  
LOOP ANTENNA  
tach the antenna wires to the  
terminals (bottom two terminals).  
Base  
Place the antenna on a flat surface and rotate it for the best AM reception.  
Antenna Wires  
If the receiver is in a rack or on a shelf and there is no room for the AM loop an-  
tenna, use two screws (not supplied) to mount the base on the wall or another  
location as shown.  
Notes:  
• Keep the AM loop antenna connected even when you use another indoor  
antenna or an outdoor AM antenna.  
• Ensure the antenna does not touch the receiver or other metal objects.  
• Do not place the antenna near a CD player, a personal computer, or a TV  
set.  
Antenna Wires  
AM Loop Antenna  
FM  
UNBAL  
75  
• If the wire between your AM loop antenna and receiver is too short, you  
can add extra wire, available at your local RadioShack store.  
AM  
You can also use a RadioShack shortwave antenna kit (Cat. No. 278-758),  
which makes an excellent outdoor AM antenna. Connect the outdoor AM an-  
tenna wire to the receiver’s AM terminal, as shown.  
LOOP  
ANTENNA  
ANTENNA  
Ground  
Outdoor AM Antenna  
FM  
UNBAL  
75  
AM  
FM Antennas  
LOOP  
AM Loop Antenna  
ANTENNA  
FM UNBAL 75  
Connect the supplied FM antenna to the  
terminal as shown, then  
ANTENNA  
extend it.  
Ground  
FM Antenna  
FM  
UNBAL  
75  
AM  
LOOP  
ANTENNA  
ANTENNA  
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 re-  
ceiver, you need a VHF/UHF/FM splitter (not included). RadioShack stores  
carry a full line of quality outdoor antennas and antenna connection accesso-  
ries.  
Note: For the best results, use 75-ohm  
coaxial cable to connect an outdoor FM  
antenna to the receiver.  
 
11  
Preparing Your Receiver  
For the best radio reception, use an outdoor antenna. Follow these steps to  
connect an outdoor FM antenna to the receiver using 75cable.  
Warning: To prevent injury, read and fol-  
low all cautions and warnings that ac-  
company the outdoor antenna.  
Note: If your antenna has 300twin-lead cable, consult your local RadioShack  
store for the correct adapter.  
1. Disconnect the supplied FM antenna from the receiver’s FM UNBAL 75Ω  
terminal.  
2. With a stripping tool, remove about 11/2 inches of the outdoor antenna ca-  
ble’s outer insulation to expose the cable’s shielding.  
3. Fold back the outer insulation from the inner insulation.  
4. Remove about 1 inch of the inner insulation from around the center wire.  
Inner Insulation  
Center Wire  
Outer Insulation  
Shielding  
5. Pull the shielding to one side. Connect the center wire to the receiver’s FM  
Caution: The cable’s shielding should  
only touch the GND terminal.  
UNBAL 75terminal. Twist the shielding to secure any loose wire strands,  
and connect it to the  
(ground) terminal.  
Center Wire  
FM  
UNBAL  
75  
75Coaxial Cable  
Shielding  
AM  
LOOP  
ANTENNA  
ANTENNA  
Note: Grounding is not necessary for reception, but we recommend it to avoid  
damage from lightning when you use an outdoor FM antenna and for better FM  
reception. Use a separate piece of thick polyvinyl insulated wire to connect the  
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.  
 
12  
Preparing Your Receiver  
If you also have an Optimus professional series CD player, VCR, or cassette  
Using One Remote Control  
for More than One Unit  
CONTROL IN  
jack to the re-  
deck with the OSR mark (  
), you can connect its  
ceiver so you can control all of your equipment with a single remote control. You  
can also use the other component’s remote control by pointing it at the re-  
ceiver’s front panel.  
Note: When you plug this system’s cable  
CONTROL IN  
component’s remote sensor is disabled.  
into a component’s  
jack, that  
1. Connect each component to the receiver as shown in “Connecting Pro-  
gram Sources” on Page 8.  
Note: You must connect the audio cables between the receiver and the  
other audio accessory to use your receiver’s remote control to control the  
accessory.  
CONTROL  
CONTROL  
OUT  
IN  
IN  
OUT  
2. Connect the cable supplied with the CD player, VCR, or cassette deck be-  
CONTROL OUT  
CON-  
jack and the other component’s  
tween the receiver’s  
TROL IN  
jack.  
3. When you want to control more than one other component using the re-  
Receiver  
Other Component  
with OSR Mark  
CONTROL OUT  
CONTROL IN  
and  
ceiver’s remote control, daisy-chain the  
connections as shown.  
To the CONTROL IN jack  
of Another Component  
Having the OSR Mark  
Remote  
Control  
The remote control uses two AA batteries (not included). For the longest battery  
life, we recommend alkaline batteries (RadioShack Cat. No. 23-557).  
Installing the  
Remote Control’s Batteries  
Cautions:  
• Use only fresh batteries of the recom-  
mended size and type.  
• Do not mix old and new batteries, dif-  
ferent types of batteries (standard,  
alkaline, or rechargeable), or re-  
chargeable batteries of different ca-  
pacities.  
1. Press and slide open the battery compartment cover.  
2. Place two fresh AA batteries in the compartment as indicated by the po-  
larity symbols (+ and –) marked in the compartment.  
• Always remove old or weak batteries.  
Batteries can leak chemicals that can  
damage electronic circuits.  
3. Replace the battery compartment cover.  
Note: If the remote’s range is reduced,  
replace the batteries immediately.  
 
13  
Preparing Your Receiver  
Your receiver has an AC power outlet that you can use to power another elec-  
tronic device, such as a turntable, cassette deck, or so on. This switched outlet  
turns on and off with the receiver and provides a maximum of 100 Watts.  
Using the AC Power Outlet  
Caution: Do not connect appliances with  
high power consumption, such as a  
heater, iron, monitor, or TV, to this AC  
outlet. Doing so can cause a risk of over-  
heating and fire, and could damage the  
receiver.  
CENTER  
PRE OUT  
L
R
MAFUFACTURED UNDER LICENSFROM DOLBY LABORATORIES  
LICENSING CORPOTATION.  
"DOLBY"  
,
"PRO LOGICAND THE DOUBLE  
D
SYMBOL ARE  
TRADEMARKS OF DOLBY LABORATORIES LICENSING CORPOTARION.  
LISTED  
8778  
AUDIO EQUIPMENT  
44688  
U
L
E
R
PRE OUT  
SUB  
WOOFER  
L
R
CENTER  
SPEAKER  
REAR  
SPEAKERS  
CAUTION: SPEAKER IMPEADAE  
16  
AC 120V 60HZ  
R
L
8
/SPEAK
A
B
A
CAUTION: SEE INSTRUCT MANUA
CAUTION:  
DO NOT CONNECT  
TV SET OR MONITOR.  
6
8
16 /SPEAKER  
16 /SPEAKER  
B
SWITCHED  
100W MAX  
0.8A MAX  
R
L
IMPEDANCE  
SELECTOR  
FRONT SPEAKERS  
AC OUTLET  
Before you plug in the receiver’s power cord, double check all other connec-  
tions.  
Connecting to AC Power  
To power the receiver, plug the receiver’s power cord into a standard AC outlet.  
The power cord’s plug is polarized and fits only one way.  
Warning: To prevent electric shock, do  
not use this polarized plug with an exten-  
sion cord, receptacle, or other outlet un-  
less you can fully insert the blades to  
prevent blade exposure.  
CENTER  
PRE OUT  
L
R
MAFUFACTURED UNDER CENSE FROM DOLBY LABORATORIES  
LICENSING CORPOTATIO
"DOLBY"  
,
"PRO LOGICAND THE DOUBLE  
D
SYMBOL ARE  
TRADEMARKS OF DOLBY ABORATORIES LICENSING CORPOTARION.  
LISTED  
8778  
AUDIO EQUIPMENT  
44688  
U
L
E
R
PRE OUT  
SUB  
WOOFER  
L
R
CENTER  
SPEAKER  
REAR  
SPEAKERS  
CAUTION: SPEAKER IMPEADAE  
6  
AC 120V 60HZ  
R
L
8
/SPEAKR  
A
B
A
CAUTION: SEE INSRUCT MANUA
CAUTION:  
DO NOT CONNECT  
TV SET OR MONITOR.  
6
8
16 SPEAKER  
16 SPEAKER  
B
SWITCHED  
100W MAX  
0.8A MAX  
R
L
IMPEDANCE  
SELECTOR  
FRONT SPEAKERS  
AC OUTLET  
 
14  
Basic Operation  
Note: The controls on the remote control work the same as the buttons on the  
receiver’s front panel.  
Warning: To prevent possible hearing  
loss, turn MASTER VOLUME to MIN before  
you turn on the receiver or change the  
program sources. After you turn on the  
receiver or change the program source,  
adjust VOLUME to a comfortable listening  
level.  
Follow these steps to use the receiver.  
1. Press POWER to turn on the receiver’s power. It takes about 5 seconds to  
begin hearing sound.  
2. Select the speakers. Aappears when SPEAKERS A is selected. Bappears  
when SPEAKERS B is selected.  
If you connected speakers only to the FRONT SPEAKERS A (or B) terminals,  
press SPEAKERS A (or B) to turn on only those speakers.  
If you connected speakers to both the FRONT SPEAKERS A and B terminals,  
do any of the following:  
Press in SPEAKERS A or B to turn on either pair of speakers for a two-  
speaker stereo effect.  
Note: If you want to find out what a par-  
ticular button or control is used for, see  
Page 23 (for the remote control) or Page  
30 (for the front panel) to find the page  
where the button or control is described.  
Press in SPEAKERS A and B to turn on both pairs of speakers for a  
four-speaker stereo effect.  
Press SPEAKERS A and B to turn off all speakers so you can listen pri-  
vately with headphones.  
3. Select a program source.  
To tune to a radio station, see “Tuning the Radio” on Page 17.  
To listen to signals from the component connected to TAPE 2 MONITOR,  
press TAPE 2 MONITOR so TAPE 2appears on the display.  
Note: If you select a source while TAPE 2  
MONITOR is engaged, TAPE 2 flashes  
five times on the display, reminding you  
to disengage the TAPE 2 MONITOR func-  
tion.  
To listen to a source other than one connected to TAPE 2 MONITOR, be sure  
TAPE 2does not show on the display. If necessary, press TAPE 2 MONI-  
TOR so TAPE 2disappears. Then press VCR/TAPE 1, DVD/TV, LD/SAT, CD,  
TUNER, PHONO, or repeatedly press FUNCTION on the remote control to dis-  
play the desired program source.  
4. Adjust MASTER VOLUME clockwise to increase the volume or counterclock-  
wise to decrease it. Or, you can use MASTER VOLUME –/+ on the remote  
control.  
5. Use the BASS and TREBLE controls to adjust the program’s tonal quality.  
6. Adjust BALANCE to suit your listening preferences. See “Balance Control”  
on Page 16.  
7. Press POWER to turn off the receiver.  
 
15  
Basic Operation  
Balance Control  
BALANCE  
The  
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 “Position-  
ing Speakers” on Page 5).  
BALANCE  
For an unusual speaker placement, adjust  
as follows:  
TUNER  
FM/AM  
to select the FM band.  
1. Select  
2. Press  
. Then press  
FM MONO  
so MONOappears. The sound is monaural instead of ste-  
reo, so each speaker delivers the same output.  
BALANCE  
3. Turn  
until you hear the sound coming equally from each speaker  
when you are in the listening area.  
FM MONO  
4. Press  
so MONOdisappears from the display.  
To increase the high and low ranges of sounds for improved audio at a low lis-  
Loudness Control  
Muting the Receiver  
Using Headphones  
LOUDNESS LOUD.  
tening level, press  
(
on the remote control) so LOUDNESSap-  
LOUDNESS  
pears on the display. Press  
again to turn off this feature.  
MUTING  
To temporarily mute the sound, press  
on the remote control. MUTING  
MUTING  
appears. Press  
again to restore the audio level.  
1
To listen with headphones (not supplied), insert the headphones’ /4 -inch plug  
PHONES  
into the receiver’s front panel  
jack. To silence the speakers, press  
SPEAKERS A  
B
and to turn off any special sound options.  
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 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.  
 
16  
Basic Operation  
You can tune your receiver manually or you can store stations in memory.  
Tuning the Radio  
Manual Tuning (Front Panel Only)  
Follow these steps to manually tune to a station.  
TUNER  
FM/AM  
to select the desired band.  
1. Press  
. Then press  
When you select the AM or FM band, the receiver tunes to and displays  
the frequency last selected in that band.  
SELECT  
2. Press  
so FREQappears on the JOG MODEdisplay.  
MULTI JOG  
3. Turn  
to tune the desired station.  
Notes:  
TUNEDappears on the display when you tune to a strong station.  
STEREOappears on the display when the tuner is receiving FM  
broadcasts.  
Memory Tuning  
Memory tuning lets you instantly tune to a stored station. You can store up to 30  
AM or FM frequencies in three different classes10 frequencies in each class.  
Follow these steps to store a station in a memory location.  
TUNER  
FM/AM  
to select the desired band.  
1. Press  
. Then press  
2. Using manual tuning, select the station you want to store.  
Notes:  
• If you store a frequency in a memory  
that already contains a frequency, you  
replace the previous frequency.  
FM MONO  
If desired, press  
for FM monaural sound (see “Using FM Mono”  
on Page 18). This setting is also stored in memory.  
MEMORY  
3. Press  
. MEMORYappears for 5 seconds.  
• If your receiver is disconnected from  
AC power for several days, it loses all  
the stored frequencies.  
CLASS  
4. While MEMORYis on the display, press  
so the class number you  
MULTI JOG  
want appears on the display, turn  
to select the memory number  
ENTER  
you want, then press  
to store the frequency in that memory.  
The class and memory number flash, then light steadily.  
SELECT  
To tune to a stored station, press  
so STappears on the JOG MODEdis-  
MULTI JOG  
play, then turn  
until the desired frequency appears on the display.  
When you reach the last frequency in a class (frequency number 10 moving for-  
ward or number 1 moving in reverse), the receiver automatically moves to the  
next class of memory.  
STATION  
You can also use  
on the remote control to select a station in mem-  
ory. See “Using the Remote Control” on Page 23.  
 
17  
Basic Operation  
Using FM Mono  
FM MONO  
To receive FM stations in stereo, press  
so MONOdisappears from the  
display. STEREOappears on the display when the tuner receives an FM broad-  
cast in stereo.  
FM MONO  
You can improve the reception of weak FM stations by pressing  
so  
MONOappears. This reduces noise while you listen to a weak FM station, but  
you get monaural instead of stereo sound.  
 
18  
Cassette Deck/VCR Features  
You can connect two cassette decks to the receiver. Selecting either VCR/TAPE 1  
or TAPE 2 MONITOR lets you hear the playback from the cassette deck you con-  
nected to the receiver’s corresponding (VCR/TAPE 1or TAPE 2 MONITOR) jacks.  
Press VCR/TAPE 1. VCRappears on the display. You hear the playback from the  
cassette deck or VCR you connected to the receiver’s VCR/TAPE 1 jacks.  
Using the VCR/TAPE 1 and  
TAPE 2 Monitor Buttons  
Press TAPE 2 MONITOR. TAPE 2appears on the display along with the last pro-  
gram source you selected. You can hear playback or monitor a recording from  
the cassette deck you connected to the receiver’s TAPE 2 MONITOR jacks.  
The TAPE 2 MONITOR REC jacks continue to output sound from the previously se-  
lected source when you press TAPE 2 MONITOR.  
To return to the previous source, press TAPE 2 MONITOR again so TAPE 2disap-  
pears.  
Notes:  
• If you press TAPE 2 MONITOR when the cassette deck is neither playing nor  
recording, the receiver mutes the current audio source. To hear the audio  
source, press TAPE 2 MONITOR so TAPE 2disappears from the display.  
• Do not press TAPE 2 MONITOR while you are recording on the deck con-  
nected to TAPE 2 MONITOR REC. If you do, the recording is interrupted for  
about 1 second.  
The receiver sends the audio program source you selectVCR/TAPE 1, TAPE 2  
MONITOR, DVD/TV, LD/SAT, CD, TUNER, or PHONOto the VCR/TAPE 1 OUT (audio)  
and TAPE 2 MONITOR REC jacks.  
Recording a Program Source  
Dubbing a Cassette Tape  
The VOLUME, BALANCE and tone controls do not affect the signal going to the  
tape decks.  
You can copy, or dub, a cassette tape from one cassette deck to another.  
You can use either deck as the playback or recording deck. However, if you  
want to monitor the cassette deck during dubbing, use the deck connected to  
the VCR/TAPE 1 jacks as the source, and the deck you connected to the TAPE 2  
jacks as the recording deck. Then press TAPE 2 MONITOR so TAPE 2appears  
on the display to hear the recording. See “Using the VCR/TAPE 1 and TAPE 2  
Monitor Buttons.  
 
19  
Cassette Deck/VCR Features  
You can connect two video sources to the receiver. If you connect a VCR to the  
Playing and Recording  
Video Tapes  
VCR/TAPE 1  
audio and video jacks, you can copy video cassette tapes from one  
VCR to another and monitor the dubbing process.  
Playing a Video Cassette Tape  
VCR/TAPE 1  
To play a video tape, load the tape into the VCR connected to either  
LD/SAT  
VCR/TAPE 1  
LD/SAT  
or ) that corresponds to the jack  
or  
. Press the button (  
the VCR is connected to. VCRor LD/SATappears on the display. Follow the  
VCR’s instructions to begin playback. If you connected a monitor to the re-  
TO MONITOR TV  
ceiver’s  
jack, you can view the program on that monitor.  
Copying a Video Cassette Tape  
Follow these steps to copy a video tape from one VCR to another.  
LD/SAT  
1. Load the tape you want to copy into a VCR connected to  
.
2. Load a blank tape (or one you want to record over) into a VCR connected  
VCR/TAPE 1  
to the  
jacks.  
LD/SAT  
3. Press  
.
4. Begin recording and playback on the VCRs.  
Important: Most material performed in public, such as concerts, plays, and  
movies, or distributed on prerecorded video tapes is copyrighted. The unautho-  
rized recording or duplication of copyrighted material is a violation of the copy-  
right laws of most countries and such duplication may result in fines,  
imprisonment, or both. Note, however, that in the United States, it is not a viola-  
tion of U.S. copyright laws for a consumer to record a broadcast television pro-  
gram for private (in-home) viewing.  
 
20  
Using Advanced Sound Options  
Your receiver has three special sound options: Dolby Pro Logic Surround, SFC  
modes (studio and arena), and 5-D Theater. These special options enhance the  
sound you hear from a program source.  
Notes:  
To get the full benefit from programs encoded with Dolby Surround  
Sound, you need a stereo VCR.  
• Dolby Surround does not operate correctly if the signal passes through a  
graphic equalizer. If you connected an equalizer to the TAPE 2 MONITOR  
jacks, do not select TAPE 2 MONITOR when you listen to Dolby Surround  
signals.  
To activate Dolby Pro Logic Surround, press DOLBY PRO LOGIC. For SFC effects  
or 5-D Theater, repeatedly press SFC MODE or 5-D THEATER until the desired op-  
tion appears on the display. For Dolby 3CH Logic, repeatedly press the remote  
control’s C. MODE button until 3CHLOGICappears on the display.  
Dolby Pro Logic Surround  
Dolby Pro Logic Surround puts you in the middle of the action. The center- and  
rear-channel speakers add incredible realism by directing the sound to the ap-  
propriate speakers, making you feel like you are really there. You can find hun-  
dreds of movies, television shows, and compact discs produced with Dolby  
Surround.  
Dolby 3CH Logic  
Dolby 3CH Logic produces a more spacious sound field than is possible with or-  
dinary stereo playback by combining the front and rear speaker sounds. Select  
this mode when you play a Dolby Surround Sound program and do not have  
rear speakers. The rear channel’s sound is sent to the front left and right speak-  
ers.  
Studio Effect  
Studio Effect gives the effect of listening in a recording studio. The front speak-  
ers provide normal stereo, and the rear speakers provide a subtly reverberated  
sound. Select this mode when you listen to sources not encoded with Dolby  
Surround.  
Arena Effect  
Arena Effect is ideal for sources such as live performances. The front speakers  
output the music, and the rear speakers output the sounds and applause of the  
audience.  
5-D Theater  
5-D Theater provides clearer and more dynamic sound effects by outputting au-  
dio signals through the rear channel to simulate the stereo sound, compared  
with a standard surround system which provides only monaural signals to the  
rear speakers. Select 5-D PRO LOGICfor the sources encoded with Dolby  
Pro Logic, and select 5-DSurroundfor normal stereo sources.  
 
21  
Using Advanced Sound Options  
Center Mode Setting  
Sound Mode Adjustments  
(Remote Control Only)  
The center mode setting affects the center channel’s bass signals. It operates  
AUDIO/SURROUND  
only when you select Dolby Pro Logic Surround Sound. Slide  
SURROUND  
C. MODE  
on the remote  
on the remote control to  
. Each time you press  
Note: If you do not use a center speaker,  
the monaural signals are reproduced  
only if you select PHANTOM.  
control, the setting changes, and the receiver displays: NORMAL, WIDE,  
PHANTOM, or 3CHLOGIC.  
NORMAL — Select this mode if you use a small center speaker. The front left  
and right speakers play the center-channel bass sounds.  
WIDE — Select this mode if you use a medium or large center speaker. The  
center speaker plays the center-channel bass sounds.  
PHANTOM — Select this mode if you have no center speaker. All center-chan-  
nel sound comes from the front left and right speakers.  
3CHLOGIC — Select this mode if you do not have rear speakers. The rear  
channel’s sound is sent to the front left and right speakers.  
Test Tone  
The test tone feature provides a test tone that lets you balance the signal levels  
between all your speakers. See “Center Level” and “Rear Level.”  
To activate the test tone, select one of the surround sound modes (except  
AUDIO/SURROUND  
AUDIO  
TEST  
. Then press  
PHANTOM) and set  
on the remote to  
TONE  
. The receiver sounds a 2-second tone from the front left, center, front right,  
and rear speakers, in sequence.  
Notes:  
• The center test tone does not sound if you select PHANTOM surround  
sound mode.  
• In the Dolby 3CH Logic Sound mode, the receiver sounds a 2-second  
tone from the left, center, and right speakers, in sequence.  
TEST TONE  
Press  
again to turn off this feature.  
Center Level  
AUDIO/SURROUND  
AUDIO  
– CENTER LEVEL +  
. Then press to adjust the cen-  
Slide  
to  
Note: Use the VOLUME control to adjust  
the overall sound level.  
ter speaker sound level.  
Rear Level  
AUDIO SURROUND  
SURROUND  
– REAR +  
. Then press to adjust the rear  
Slide  
/
to  
speakers’ sound level.  
CENTER  
REAR LEVEL  
work only for the sound system that supports the  
Both  
and  
REAR LEVEL  
center or rear speakers. For example,  
Logic.  
does not work for Dolby 3CH  
 
22  
Using the Remote Control  
The remote control works up to a distance of about 23 feet, and within a 30-de-  
gree angle on either side of the receiver. Point the control at the receiver’s front  
panel and press 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 but-  
tons on the receiver.  
AUDIO/SURROUND Switch  
Some buttons on the remote control have two functions. Set the AUDIO/SUR-  
ROUND switch to AUDIO to activate the function printed in green on the remote  
control’s panel. Set the switch to SURROUND to use the function printed in gold.  
For example, the button marked C. MODE and TEST TONE operates as the center  
mode adjust when you set the switch to SURROUND and as the test tone function  
when you set the switch to AUDIO.  
Receiver/Amplifier Section  
+
MASTER VOLUME  
Adjusts the system’s volume. See Page 14.  
C. MODE  
AUDIO/  
Selects among the four center mode settings with  
SURROUND set to SURROUND. See Page 21.  
TEST TONE  
AUDIO/SURROUND  
Sounds test tones from each speaker with  
set to AUDIO. See Page 21.  
+
CENTER  
AU-  
Controls the relative volume of the center speaker with  
DIO/SURROUND set to AUDIO. See Page 21.  
SURROUND  
AUDIO  
+
DISC  
REAR  
AUDIO/  
Controls the relative volume of the rear speakers with  
SURROUND set to SURROUND. See Page 21.  
CD  
ASMS  
RANDOM  
BEST  
SFC MODE  
Selects between Studio Effect or Arena Effect, or turns the  
SFC mode off. See Page 20.  
TAPE  
DECK2  
DECK1  
5-D THEATER  
Selects between 5-D Pro Logic or 5-D Surround, or turns the  
5-D function off. See Page 20.  
STATION  
CLASS FM MONO  
REAR  
CENTER  
LEVEL  
C.MODE  
TEST  
TONE  
PRO LOGIC  
LOUD.  
Turns the Dolby Pro Logic Surround on and off. See Page 20.  
Ρεχειϖερ/  
Αµπλιφιερ  
Σεχτιον  
PRO  
LOGIC  
5-D  
SFC  
MUTINTG  
THEATER  
MODE  
Boosts/cuts high and low frequency sounds at low listening  
levels. See Page 15.  
TAPE2  
LOUD  
FUNCTION MONITOR  
POEWR  
MASTER  
VOLUME  
RECEIVER  
CD  
TAPE  
TAPE 2 MONITOR  
FUNCTION  
Switches the receiver to monitor the source connected to the  
TAPE 2 MONITOR jacks. See Page 18.  
STAV-3680 AUDIO/VIDEO  
OSR  
SYSTEM REMOTE  
Selects a program source (VCR/Tape 1, DVD/TV, LD/SAT,  
CD, tuner, or phono). Repeatedly press FUNCTION until the  
display shows your desired program source. See Page 14.  
RECEIVER POWER  
MUTING  
Turns the receiver on and off. See Page 14.  
Silences the receiver. Press again to restore the sound to its  
previous level. See Page 15.  
CLASS  
AUDIO/SURROUND  
Selects the receiver’s memory class with  
set to AUDIO. See Page 16.  
FM MONO  
STATION  
AUDIO/SURROUND  
set to  
Selects the FM reception mode with  
AUDIO. See Page 17.  
Press to tune to the next higher or lower memory location  
with AUDIO/SURROUND set to AUDIO. See Page 16.  
 
23  
Using the Remote Control  
CD Player Section  
Before operation:  
• Press CD to select the CD player operation.  
• Set AUDIO/SURROUND to AUDIO.  
• You must connect the CD player to both your receiver’s CONTROL OUT and  
audio jacks for these functions to work.  
CD POWER  
Turns the CD player on and off (only for CD players that have  
the CONTROL IN/OUT feature).  
|
and  
|
Returns to the beginning of the current track/chapter or ad-  
vances to the next track/chapter.  
DISC  
Selects discs in a multi-play CD changer.  
Note: DISC does not work with all CD players.  
Starts playback.  
SURROUND  
DISC  
AUDIO  
CD  
CD Player  
Section  
ASMS  
RANDOM  
BEST  
Stops playback.  
Tape  
Section  
TAPE  
DECK2  
DECK1  
Pauses playback.  
STATION  
CLASS FM MONO  
RANDOM  
BEST  
Plays the tracks on a CD in random order.  
REAR  
CENTER  
LEVEL  
C.MODE  
TEST  
TONE  
PRO  
5-D  
SFC  
Selects your favorite programs. During play of your favorite  
program, press BEST. The unit memorizes the track number  
then plays only the memorized tracks later.  
MUTINTG  
LOGIC  
THEATER  
MODE  
TAPE2  
MONITOR  
LOUD  
FUNCTION  
RECEIVER  
POEWR  
CD  
MASTER  
VOLUME  
TAPE  
STAV-3680 AUDIO/VIDEO  
OSR  
Tape Section  
SYSTEM REMOTE  
Before operation:  
• Select the desired equipment (VCR/TAPE 1 or TAPE 2 MONITOR).  
• Set AUDIO/SURROUND to AUDIO.  
• For a dual cassette deck, select DECK 1 or DECK 2. If you use a single cas-  
sette deck, press DECK 2.  
• You must connect the tape deck/player to both your receiver’s CONTROL  
OUT and audio jacks for these functions to work.  
Press to start normal play.  
Press to play the reverse side of an auto-reverse cassette  
deck.  
Pauses playback.  
Stops playback.  
and  
Lets you rapidly scan a tape/CD either forward or backward.  
DECK 1/DECK 2  
Selects Deck 1 or Deck 2 when you use a dual cassette deck  
with AUDIO/VCR set to AUDIO.  
TAPE POWER  
Turns the connected cassette deck on and off.  
 
24  
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  
Solution  
Plug in the power cord.  
Power does not turn on.  
Power cord is disconnected.  
Protection circuit is activated.  
Unplug the power cord, then plug it in again.  
The receiver does not respond Static discharge has affected control.  
to button presses.  
Unplug the power cord, then plug it in again.  
(If static electricity is a problem, use the re-  
mote control whenever possible.)  
No sound.  
Incorrect connections.  
Check and correct the connections.  
Press MUTING.  
The mute function is activated.  
The volume is turned down.  
Turn up the volume.  
Speaker wires are disconnected.  
Neither set of speakers is selected.  
Tape 2 monitor function is engaged.  
Connect the speaker wires.  
Press in SPEAKERS A or B.  
Press TAPE 2 MONITOR so TAPE 2disap-  
pears from the display.  
No picture when you select a  
video source.  
The selected video source is not set  
correctly.  
Correct the problem with the selected video  
source.  
Incorrect connections.  
Correct the connections.  
Tune to a stronger station.  
Connect the antenna.  
High noise level.  
Station not correctly tuned.  
Antenna not connected.  
FM antenna still coiled or is not point-  
ing in the correct direction.  
Stretch both ends of the antenna taut and re-  
position the antenna.  
AM loop antenna not pointing in the  
correct direction.  
Adjust the AM loop antenna.  
Noise is coming from another electri-  
cal appliance.  
Try using an AC line noise filter to reduce the  
noise.  
Cannot make copies of video  
tapes.  
Tapes are protected by a copy restric-  
tion method.  
You cannot make a usable copy.  
Video connections are incorrect.  
Check and correct the connections.  
Remote does not control cas- Cassette deck or CD player not com-  
This feature works only with Optimus Profes-  
sional Series components.  
sette deck or CD player.  
patible.  
Control cable is not plugged in.  
Audio cables are not plugged in.  
Properly connect the control cable.  
Properly connect the audio cables.  
Press RETURN on the receiver to return the controls to the following settings.  
Returning Controls to  
Factory Defaults  
Tape 2 Monitor Off  
Source  
TUNER  
On  
Speakers A  
FM or AM (Set to the last-tuned frequency. If the receiver  
cannot receive the frequency, it starts searching for the next  
strong station.)  
Band  
Surround Mode Off  
Loudness  
Muting  
Off  
Off  
 
25  
Care and Maintenance  
Your STAV-3680 Audio/Video Receiver is an example of superior design and craftsmanship. The following suggestions will help  
you care for the receiver so you can enjoy it for years.  
Keep the receiver dry. If it gets wet, wipe it dry immediately. Liquids can contain  
minerals that can corrode the electronic circuits.  
Handle the receiver gently and carefully. Dropping it can damage its circuit  
boards and can cause the receiver to work improperly.  
Use and store the receiver only in normal temperature environments. Tempera-  
ture extremes can shorten the life of electronic devices, damage batteries, and  
distort or melt plastic parts.  
Keep the receiver away from dust and dirt, which can cause premature wear of  
parts.  
Wipe the receiver with a damp cloth occasionally to keep it looking new. Do not  
use harsh chemicals, cleaning solvents, or strong detergents to clean the re-  
ceiver.  
Use only fresh batteries of the recommended size and type in the remote con-  
trol. Always remove old or weak batteries. They can leak chemicals that can de-  
stroy electronic circuits.  
Modifying or tampering with your receiver’s internal components can cause a malfunction and might invalidate the receiver’s  
warranty and void your FCC authorization to operate it. If the receiver is not operating as it should, take it to your local  
RadioShack store for assistance.  
 
26  
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.  
 
27  
Specifications  
Amplifier  
Front Channel Average Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Watts per Channel into 8 Ohms  
From 20 to 20,000 Hz,  
With No More than 0.09% Total Harmonic Distortion  
Measured Pursuant to the Federal Trade Commission’s  
Trade Regulation Rule on Amplifier Output Power Claims  
Front Channel Surround Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Watts per Channel  
Center Channel Surround Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Watts  
Continuous Rear Surround Power Output . . . . . . . . . . . . . . . . . . . . . . . . . 100 Watts per Channel (1 kHz, 0.8% THD, 8 Ohms)  
Input Sensitivity/Impedance  
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8 mV/47 kOhms  
CD, LD, VCR/TAPE 1, Tape 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mV/47 kOhms  
Phono Overload Level (0.1% THD, 1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mV  
Frequency Response  
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20 Hz to 20,000 Hz ±0.3 dB  
CD, LD, VCR/TAPE 1, TAPE 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Hz to 100,000 Hz +0/–3 dB  
Output Level/Impedance  
VCR/TAPE 1 REC, Tape 2 Monitor REC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mV/2.2 kOhms  
Tone Controls  
Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±9 dB (100 Hz)  
Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±9 dB (10 kHz)  
Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +8 dB/+6 dB (100 Hz/10 kHz)  
Signal-to-Noise Ratio (IHF, Short Circuited, A Network)  
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 dB  
CD, LD, VCR/TAPE 1, Tape 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 dB  
Signal-to-Noise Ratio (EIA, at 1 Watt, 1 kHz)  
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 75 dB  
CD, LD, VCR/TAPE 1, Tape 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 dB  
Video Section  
Input Sensitivity/Impedance VCR/TAPE 1, LD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Volt Peak-to-Peak/75 Ohms  
Output Level/Impedance VCR/TAPE 1, Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Volt Peak-to-Peak/75 Ohms  
Frequency Response VCR /TAPE 1, LD Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Hz to 7MHz +0/–3 dB  
Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 dB  
Crosstalk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 dB  
 
28  
Specifications  
FM Tuner  
Frequency Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87.5 to 108 MHz  
Usable Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mono: 11.2 dBf, IHF (1.0 µV/75 Ohms)  
50 dB Quieting Sensitivity  
Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.8 dBf (1.9 µV/75 Ohms)  
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38.6 dBf (23.3 µV/75 Ohms)  
Signal-to-Noise Ratio  
Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 dB (at 85 dBf)  
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 dB (at 85 dBf)  
Distortion Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5% (1 kHz)  
Alternate Channel Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 dB (400 kHz)  
Stereo Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 dB (1 kHz)  
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Hz to 15 kHz (±1 dB)  
Antenna Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Ohms Unbalanced  
AM Tuner  
Frequency Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530 to 1700 kHz  
Sensitivity (IHF, Loop Antenna) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 µV/m  
Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 dB  
Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 dB  
General  
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 Volts AC, 60 Hz  
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260 Watts, 360 VA (UL)  
AC Outlet Ratings Switched . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total 100 Watts (0.8 Amps) Maximum  
Dimensions (HWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1/8 × 16 9/16 × 14 3/4 Inches  
(155 × 420 × 374 mm)  
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 lb 1 oz  
(9.1 kg)  
Specifications are typical; individual units might vary. Specifications are subject to change and improvement without notice.  
 
29  
Index to Features by Control Name  
This table lists the control and indicator names found on the front of your receiver, along with the page number where the con-  
trol or indicator is discussed. To find a description for the buttons on the remote control, see “Using the Remote Control” on  
Page 23.  
Control  
See Page  
5-D THEATER  
21  
16  
BALANCE  
BASS  
15  
CD  
15  
CLASS  
17  
DOLBY PRO LOGIC  
DVD/TV  
21  
15  
FM/AM  
17  
FM MONO  
LD/SAT  
18  
15  
LOUDNESS  
MEMORY  
MULTI JOG  
PHONES  
16  
17  
17  
16  
PHONO  
15  
POWER  
15  
RETURN  
25  
SELECT  
17  
SFC MODE  
SPEAKERS A and B  
TAPE 2 MONITOR  
TREBLE  
21  
15  
15, 19  
15  
TUNER  
16  
TUNING  
17, 24  
15, 19  
15  
VCR/TAPE 1  
MASTER VOLUME  
 
30  
Notes  
 
31  
Limited Two-Year Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship under normal use for two (2) years from the date of purchase from RadioShack company-  
owned 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 LIABIL-  
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-  
SPECT 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 WAR-  
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-  
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,  
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-  
VISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-  
cidental 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, un-  
less 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 prop-  
erty 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, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102  
We Service What We Sell  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
<ARB7118-A>  
6A7  
Printed in Malaysia  
 

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