Optimus Stereo Receiver STAV 3370 User Manual

Cat. No. 31-3032  
Digital Synthesize  
Audio/Video  
Surround Receive  
R
STAV-3370  
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.  
To prevent fire or shock hazard, do not expose this sys-  
tem 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.  
CAUTION  
Attachments — Do not use attachments/accessories not recommended by the product manufac-  
turer, as they might create a hazard.  
RISK OF ELECTRIC SHOCK.  
!
DO NOT OPEN.  
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).  
CAUTION  
: TO REDUCE THE RISK OF  
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.  
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 im-  
portant operating and maintenance instruc-  
tions are included in the literature acc-  
ompanying 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 LinesLocate 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 PeriodsUnplug 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 GroundingIf an outside antenna  
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 80, 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Connecting the Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Using One Remote Control for More than One Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Installing the Remote Control’s Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Using the AC Power Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Connecting to AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Demonstration Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Balance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Muting the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Using Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Tuning the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Using FM Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Turning Off the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Using Sleep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Cassette Deck/VCR Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Using the VCR/TAPE 1 Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Using the TAPE 2 MONITOR Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Recording a Program Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Dubbing a Cassette Tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Playing and Recording Video Tapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Using Advanced Sound Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
Sound Mode Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Using the Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Returning Controls to Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
The FCC Wants You To Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
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
Between 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 Radio Shack store.  
Halfway Point  
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.  
Main 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 speakers at the  
front of your listening area, and place the surround speakers behind or to the  
sides of the listening point (see “Using Advanced Sound Options”). Also, place  
the center speaker above, below, or behind the TV. Sound might not appear to  
coincide with the picture if you place it beside the TV.  
Right Front  
Left Front  
Center Channel  
Listening  
Area  
Rear Channel  
Rear Channel  
 
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  
Speakers A  
Speakers B  
.
and one set to  
• Realistic, Optimus, and other high-  
quality speakers have color-coded  
speaker terminals (red for positive  
polarity and black for negative polar-  
ity). Use these color-coded terminals  
as a guide to help you properly con-  
nect the speakers to the receiver.  
• Use 16-gauge (or larger) speaker wire  
for all speaker connections, and con-  
sider possible speaker locations  
before you decide how much speaker  
wire you need.  
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.  
Surround  
Speakers  
Left  
R
L
L
A
B
A
B
R
CENTER  
SPEAKER  
REAR  
SPEAKERS  
FRONT SPEAKERS  
Center Speaker  
Front B Speaker  
Front A Speaker  
Left  
Left  
 
6
Preparing Your Receiver  
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 FRONT  
SPEAKERS A terminals.  
1. Press 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. Press 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  
conductor.  
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 FRONT  
SPEAKERS A L terminals.  
Repeat this entire process to connect a second pair of speakers to the FRONT  
SPEAKERS B terminals.  
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 “Con-  
necting 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, as shown. 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 recreating the rumble of an earth-  
quake, the bone-jarring percussion of a cannon, and more.  
To use this output, simply connect it to an amplified subwoofer’s line-level input  
or to an amplifier to which you have connected a subwoofer.  
Radio Shack stores sell a variety of suitable subwoofers and amplifiers.  
 
7
Preparing Your Receiver  
You can connect up to five external program sources to your receiver.  
Connecting Program Sources  
OUT PUT  
L
CD  
R
L
FM  
UNBAL  
R
75  
TO MONITOR TV  
VIDEO OUT  
IN  
OUT  
IN  
GND  
VIDEO  
REC  
PLAY  
AM  
L
IN  
GND  
L
OUT  
R
LOOP  
ANTENNA  
R
TAPE2  
MONITOR  
VCR  
/TAPE1  
ANTENNA  
PHONO  
CD  
LD  
CONTROL  
GND  
L
R
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.  
Use shielded audio cables with phono  
connectors for all audio connections.  
Connect the turntable’s left and right cables to the receiver’s left and right  
PHONO  
GND  
jacks. Then connect the turntable’s ground wire to the receiver’s  
terminal.  
Connecting Cassette Deck(s)  
VCR/TAPE 1  
TAPE 2 MONITOR  
and the  
You can connect cassette decks to the  
Note: If you place the cassette deck  
directly 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  
jacks. Connect the cassette deck’s output jacks to the  
(audio) or  
TAPE 2 PLAY  
VCR/  
jacks, and connect the input jacks of your cassette deck to  
TAPE 2 REC  
TAPE 1 OUT  
(audio) or  
jacks.  
LD IN  
You can connect a third cassette deck (for playback only) to the  
jacks.  
(audio)  
Connecting a CD Player  
To connect a CD player to the receiver, connect the CD player’s left and right  
R CD  
L
output jacks to the receiver’s and  
input jacks.  
 
8
Preparing Your Receiver  
Connecting Video Sources  
If you connect two video sources such as VCRs or laser disc players to your  
receiver, you can use the receiver to switch between viewing the sources. 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 Radio  
Shack store) to connect the VCR’s audio  
output to both the L and R audio inputs  
on the receiver.  
LD Player  
Speaker  
AUDIO  
OUT  
VIDEO  
OUT  
L
R
R
L
IDEO  
IN  
Power  
Amplifie  
IN  
FM  
UNBAL  
75  
TO MONITOR TV  
VIDEO OUT  
IN  
OUT  
IN  
GND  
VIDEO  
R
R
L
L
R
L
CENTER  
PRE OUT  
REC  
PLAY  
AM  
A
B
A
B
IN  
L
GND  
L
LOOP  
ANTENNA  
OUT  
R
R
CENTER  
SPEAKER  
REAR  
SPEAKERS  
TAPE2  
MONITOR  
VCR  
PRE OUT  
FRONT SPEAKERS  
AC OUTLET  
ANTENNA  
PHONO  
CD  
LD  
/TAPE1  
CONTROL  
SUB  
WOOFER  
GND  
VIDEO  
IN  
OUT  
L
R
(REC)  
IN  
(PLAY)  
OUT  
VCR  
Connect phono cables from a VCR’s audio outputs to the receiver’s VCR/TAPE 1  
or LD 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 or LD VIDEO IN jacks. Then connect video cables from the  
receiver’s VCR/TAPE 1 VIDEO OUT jack to the VCR’s video input.  
Connecting a Video Monitor  
The monitor (or TV with baseband video input) you connect to the VIDEO OUT  
terminal can monitor any program you connect to the receiver’s VCR/TAPE 1 or  
LD input jacks. Then connect a video cable from the receiver’s VIDEO OUT TO  
MONITOR TV jack to the monitor’s video input.  
 
9
Preparing Your Receiver  
Connecting the Antennas  
In many cities, the supplied indoor AM loop and FM antennas provide adequate  
reception.  
AM Antennas  
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  
AM  
GND  
terminals (bottom two terminals).  
attach the antenna wires to the  
and  
Place the antenna on a flat surface and rotate it for the best AM reception.  
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.  
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  
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 Radio Shack store.  
GND  
AM Loop Antenn  
AM  
Ground  
You can also use a Radio Shack shortwave antenna kit (Cat. No. 278-  
758), which makes an excellent outdoor AM antenna.  
GND  
LOOP  
ANTENNA  
Connect the outdoor AM antenna wire to the receiver’s AM terminal, as shown.  
r AM Antenna  
FM  
UNBAL  
75  
GND  
AM  
FM Antennas  
FM UNBAL 75  
Connect the supplied FM antenna to the  
as shown.  
terminal and extend it  
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). Radio Shack 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  
antenna to the receiver.  
 
10  
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  
accompany the outdoor antenna.  
Note: If your antenna has 300twin-lead cable, consult your local Radio Shack  
store for the correct adapter.  
FM UNBAL 75  
1. Disconnect the supplied FM antenna from the receiver’s  
terminal.  
2. With a stripping tool, remove about 11/2 inches of the cable’s outer insula-  
tion to expose the cable’s shielding.  
3. Fold back the insulation from the inner insulation.  
4. Remove about 1 inch of the inner insulation from around the center wire.  
FM  
5. Pull the shielding to one side. Connect the center wire to the receiver’s  
Caution: The cable’s shielding should  
UNBAL 75  
terminal. Twist the shielding to secure any loose wire strands,  
GND  
only touch the  
terminal.  
GND  
and connect it to the  
terminal.  
FM Outdoor Antenna  
FM  
UNBA  
75  
GND  
AM  
75 Coaxial Cable  
GND  
LOOP  
ANTENNA  
Note: Grounding is not necessary for re
G
c
r
e
o
u
p
n
ti
d
on, 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  
GND  
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.  
 
11  
Preparing Your Receiver  
If you also have an Optimus professional series CD player, VCR, or cassette  
CONTROL IN  
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 receiver’s  
front panel.  
Using One Remote Control  
for More than One Unit  
deck with the OSR mark, you can connect its  
jack to the receiver  
Note: When you plug the cable into a  
CONTROL IN  
component’s remote sensor does not  
function.  
component’s  
jack, that  
1. Connect each component to the receiver as shown in “Connecting Pro-  
gram Sources.”  
2. Connect the cable supplied with the CD player, VCR, or cassette deck  
CONTROL  
CONTROL OUT  
between the receiver’s  
CONTROL IN  
jack and the other component’s  
IN  
IN  
jack.  
OUT  
OUT  
CONTROL  
3. When you want to control more than one other component using the  
CONTROL OUT CONTROL  
receiver’s remote control, daisy-chain the  
IN  
and  
connections as shown.  
Receiver  
Other Component  
with OSR Mark  
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 Radio Shack’s alkaline batteries (Cat. No. 23-557).  
Installing the  
Remote Control’s Batteries  
1. Press and open the battery  
compartment cover.  
2. Place two fresh AA batteries in  
the compartment as indicated by  
the polarity symbols (+ and –)  
marked in the compartment.  
Cautions:  
• Use only fresh batteries of the recom-  
mended size and type.  
• 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.  
 
12  
Preparing Your Receiver  
Your receiver has an AC power outlet that you can use to power an electronic  
device, such as a turntable, cassette deck, VCR, and so on. This switched out-  
let 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.  
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 supplied 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  
unless you can fully insert the blades to  
prevent blade exposure.  
R
R
L
L
A
B
FRONT SPEAKERS  
AC OUTLET  
RETURN  
To see a demonstration of the receiver’s display, press and hold  
while  
Demonstration Display  
turning on power. The receiver cycles through several demonstration displays.  
To exit the demonstration mode, press any key.  
 
13  
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 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 VOL-  
UME 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.  
FRONT SPEAKERS A  
B
If you connected speakers only to the  
(or ) ter-  
SPEAKERS A (or B) to turn on only those speakers.  
minals, press  
FRONT SPEAKERS A  
B
If you connected speakers to both the  
and ter-  
minals, 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 22 (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 the out position to silence all speakers  
and listen privately with headphones.  
3. Select a program source.  
To tune to a radio station, see “Tuning the Radio” on Page 16.  
TAPE 2 MONI-  
To listen to signals from the component connected to  
Note: If you select a source while TAPE 2  
MONITOR is engaged, TAPE 2flashes  
five times on the display, reminding you  
to disengage the TAPE 2 MONITOR func-  
tion.  
TOR press TAPE 2 MONITOR so TAPE 2appears on the display.  
,
TAPE 2 MONITOR  
To listen to a source other than one connected to  
,
be sure TAPE 2does not show on the display. If necessary, press TAPE  
2 MONITOR so TAPE 2disappears.  
Then press VCR/TAPE 1, LD (laser disc), CD, TUNER, PHONO, or repeat-  
edly press FUNCTION on the remote control to display the desired pro-  
gram source.  
4. Adjust VOLUME clockwise to increase the volume and counterclockwise  
to decrease it. Or, you can use MASTER VOLUME –/+ on the remote con-  
trol.  
5. Use the BASS and TREBLE controls to adjust the program’s tonal quality.  
To enhance the bass level, press SUPER BASS.  
6. Adjust BALANCE to suit your listening preferences. See “Balance Control”  
on Page 15.  
7. Press POWER to turn off the receiver.  
 
14  
Basic Operation  
BALANCE  
The  
control lets you adjust the sound balance between the left and  
Balance Control  
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:  
to select the FM band.  
until MONOappears. The sound is monaural instead of  
TUNER  
FM/AM  
1. Select  
. Then press  
FM MONO  
2. Press  
stereo, 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  
until MONOdisappears from the display.  
MUTING  
To temporarily mute the sound, press  
on the remote control. MUTING  
again to restore the audio level.  
Muting the Receiver  
Using Headphones  
MUTING  
appears. Press  
1
To listen with headphones (not supplied), insert the headphones’ /4-inch plug  
PHONES  
A
into the receiver’s front panel  
jack. To silence the speakers, set and  
B SPEAKERS  
to the out position and 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.  
 
15  
Basic Operation  
Tuning the Radio  
Your receiver offers three types of electronic tuningmanual, automatic, and  
memory.  
Manual and Automatic Tuning  
Follow these steps to manualy or automatically tune to the stations.  
TUNER  
FM/AM  
to select the desired band.  
1. Press  
. Then press  
When you select the AM or FM radio band, the receiver tunes to and dis-  
plays the frequency last selected in that band.  
SELECT  
2. Press  
so FREQappears on the JOG MODEdisplay.  
3. To manually tune the station, turn the multi-jog control or repeatedly press  
TUNING +  
or on the remote control to tune the desired station.  
AUDIO/VCR  
To automatically tune to the next higher or lower station, set  
TUNING +  
press and hold  
or on the remote control until the stations start  
to change. Then release the button.  
Notes:  
TUNEDappears on the display when you tune to a strong station.  
STEREOappears on the display when FM broadcasts are received in  
stereo and the receiver is not set to FM mono.  
Memory Tuning  
Memory tuning lets you instantly tune to a stored frequency. You can store up to  
30 AM or FM frequencies in the receiver’s memory.  
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 either manual or automatic tuning, select the frequency 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 17). This setting is stored in the memory.  
• If your receiver is disconnected from  
AC power for several days, it loses all  
the stored frequencies.  
MEMORY  
3. Press  
. MEMORYappears for 5 seconds.  
4. While MEMORYis on the display, turn the multi-jog control to select the  
ENTER  
memory number you want, then press  
memory.  
to store the frequency in  
The frequency and memory number flash, then light steadily.  
SELECT  
To tune to a stored frequency, press  
so STappears on the JOG MODE  
STATION –/+  
display, then turn the multi-jog control. You can use  
on the remote  
control to move to the next lower or higher memory. See “Using the Remote  
Control” on Page 22.  
 
16  
Basic Operation  
FM MONO  
To receive FM stations in stereo, press  
until MONOdisappears from  
Using FM Mono  
the display. STEREOappears on the display when you receive an FM broadcast  
in stereo.  
FM MONO  
You can improve the reception of weak FM stations by pressing  
until  
MONOappears. This reduces noise while you listen to a weak FM station, but  
you get monaural instead of stereo sound.  
You can turn the display off so it does not bother you in a darkened room. Press  
Turning Off the Display  
DISPLAY OFF  
. Only DISPLAY OFFappears on the display.  
DISPLAY OFF  
Press  
again or press any button to restore the display.  
The sleep function lets you set the receiver to turn off after 90, 60, or 30 min-  
AUDIO/VCR AUDIO SLEEP  
Using Sleep  
(Remote Control Only)  
utes. To start the timer, set  
to  
. Then repeatedly press  
until the desired turn-off time appears. To cancel the timer, repeatedly press  
SLEEP  
until the sleep time disappears from the display.  
 
17  
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  
connected to the receiver’s corresponding (VCR/TAPE 1, 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  
Button  
Press TAPE 2 MONITOR. TAPE 2appears on the display along with the last  
program 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.  
Using the TAPE 2  
MONITOR Button  
The TAPE 2 REC jacks continue to output the previously selected source when  
you press TAPE 2 MONITOR.  
To return to the previous source, press TAPE 2 MONITOR again so TAPE 2dis-  
appears.  
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 until TAPE 2disappears from the  
display.  
• Do not press TAPE 2 MONITOR while you are recording on the deck con-  
nected to TAPE 2 REC. If you do, the recording is interrupted for about 1  
second.  
The receiver sends the audio program source you select—VCR/TAPE 1, TAPE 2  
MONITOR, LD, CD, TUNER, PHONOto the VCR/TAPE 1 OUT (audio) and TAPE 2  
MONITOR REC jacks.  
Recording a Program Source  
The VOLUME control does not affect the level of the signal going to the tape  
decks.  
 
18  
Cassette Deck/VCR Features  
You can copy, or dub, a cassette tape from one cassette deck to another.  
Dubbing a Cassette Tape  
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  
VCR/TAPE 1  
TAPE 2  
until TAPE 2  
the  
jacks as the source, and the deck you connected to the  
TAPE 2 MONITOR  
jacks as the recording deck. Then press  
appears on the display. See “Using the TAPE 2 MONITOR Button” on the previ-  
ous page.  
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  
VCR/TAPE 1  
. Press the button (  
LD  
or ) that corresponds to the jack the  
or  
VCR is connected to. VCRor LDappears on the display. Follow the VCR’s  
instructions to begin playback. If you connected a monitor to the receiver’s  
TO  
MONITOR TV  
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  
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) in the VCR connected  
VCR/TAPE 1  
to the  
jacks.  
LD  
3. Press  
.
4. Begin recording and playback on the VCRs.  
 
19  
Using Advanced Sound Options  
Your receiver has four special sound options: Dolby Pro-Logic Surround, Dolby  
3CH Logic, Studio-Effect Surround, and Simulated Surround. These special  
options enhance 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 or Dolby 3CH Logic, press its button. For  
studio effect, simulated surround, or arena effect, press SFC MODE until the  
desired option appears on the display. On the remote control, press 3CH LOGIC  
to select Dolby 3CH Logic Sound and use SURR MODE for other sound options.  
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  
appropriate speakers, making you feel like you are really there. You can find  
hundreds 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  
ordinary 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  
speakers.  
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.  
Simulated Surround  
Simulated Surround simulates a surround effect when you listen to a monaural  
(mono) source.  
 
20  
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  
only when you select the Dolby Pro-Logic Surround or Dolby 3CH Logic mode.  
AUDIO VCR  
AUDIO  
CENTER  
. Each time you press  
Slide  
on the remote control to  
Notes:  
MODE  
on the remote control, the setting changes, and the receiver’s corre-  
• If you do not use a center speaker, the  
monaural signals are only reproduced  
if you select PHANTOM.  
sponding indicator lights: NORMAL- WIDE- PHANTOMfor Dolby Pro-Logic Sur-  
round; NORMAL- WIDEfor Dolby 3CH Logic.  
NORMALSelect this mode if you use a small center speaker. The front left and  
right speakers play the center-channel bass sounds.  
• You cannot select PHANTOM in the  
Dolby 3CH Logic Sound mode.  
WIDESelect this mode if you use a medium or large center speaker. The cen-  
ter speaker plays the center-channel bass sounds.  
PHANTOMSelect this mode if you have no center speaker. All center-channel  
sound comes from 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 and set  
AUDIO/VCR  
VCR  
TEST TONE  
. Then press . The receiver sounds  
on the remote to  
a 2-second tone from the front left, center, front right, and rear speakers, in  
sequence. The center test tone sounds only when you select the Dolby Pro-  
Logic Surround or Dolby 3 CH Logic 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 VCR  
AUDIO  
– CENTER +  
. Then press to adjust the center  
Slide  
to  
speaker sound level while in the Dolby Pro-Logic Surround or Dolby 3CH Logic  
mode.  
Notes:  
VOLUME  
• Use the  
control to adjust the  
overall sound level.  
Rear Level  
• Set the center mode to a selection  
other than PHANTOM before adjusting  
the center level.  
AUDIO VCR  
VCR  
– REAR +  
. Then press to set the rear speakers’ sound  
Slide  
to  
level while in the Dolby Pro-Logic Surround or Simulated Surround mode.  
Delay Time  
In the Simulated Surround and Dolby Pro-Logic Surround modes, the receiver  
slightly delays the sound going to the rear speakers. You can change the delay  
time from 16 to 30 milliseconds (ms) in 2 ms steps. Adjust this for the best sur-  
round effect.  
Notes:  
• For Dolby Pro-Logic Surround, the  
delay is preset to 20 mS.  
• The delay time does not affect the Stu-  
dio Effect mode.  
AUDIO VCR VCR  
to  
DELAY TIME  
to change the delay  
Slide  
. Then press and hold  
time. The receiver displays the selected time.  
 
21  
Using the Remote Control  
The remote control works up to a distance of about 23 feet, and within a 30-  
degree 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/VCR Switch  
The remote control can also control other compatible audio/video components  
when you connect them to the receiver’s CONTROL OUT jack. Set the switch to  
AUDIO to control audio components such as CD players or cassette decks. Set  
the switch to VCR to control video components such as a VCR.  
When you set the switch to VCR, dual-function buttons control the function  
marked in gold next to the button. For example, the button marked CENTER  
MODE and TEST TONE operates as the center mode adjust when you set the  
switch to AUDIO and as the delay time function when you set the switch to VCR.  
Receiver/Amplifier Section  
FUNCTION  
Selects a program source (VCR/Tape 1, LD, CD, tuner, or  
FUNCTION  
phono). Repeatedly press  
until the display shows  
your desired program source. See Page 14.  
Adjusts the system’s volume. See Page 14.  
Selects among the three center mode settings with  
– MASTER VOLUME +  
CENTER MODE  
AUDIO  
/
VCR  
AUDIO  
. See Page 21.  
set to  
– CENTER +  
– REAR +  
Controls the relative volume of the center speaker with  
AUDIO VCR AUDIO  
/
set to  
. See Page 21.  
Controls the relative volume of the rear speakers with  
AUDIO VCR VCR  
/
set to  
. See Page 21.  
TEST TONE  
DELAY TIME  
AUDIO VCR  
set to  
Sounds test tones from each speaker with  
VCR  
/
. See Page 21.  
Sets the rear-channel delay for Dolby Pro-Logic Surround  
AUDIO VCR  
set to  
and Simulated Surround programs with  
VCR  
/
. See Page 21.  
SURR MODE  
SLEEP  
Selects between Dolby Pro-Logic Surround or Simulated Sur-  
round sound. See Page 20.  
Sets the receiver to turn off after 90, 60, or 30 minutes with  
AUDIO VCR  
AUDIO  
. To start the timer, repeatedly  
/
set to  
SLEEP  
press  
appears. To cancel the timer, repeatedly press  
until the desired turn-off time ( )  
90 60 30  
,
, or  
SLEEP  
until  
the sleep time disappears from the display. See Page 17.  
RECEIVER POWER  
RETURN  
Turns the receiver on and off. See Page 14.  
Returns the receiver to its default settings. See Page 27.  
Selects Dolby 3CH Logic. See Page 20.  
3CH LOGIC  
TAPE 2 MONITOR  
Switches the receiver to monitor the source connected to the  
TAPE 2 MONITOR  
jacks. See Page 18.  
 
22  
Using the Remote Control  
MUTING  
Silences the receiver. Press again to restore the sound to its  
previous level. See Page 15.  
– TUNING +  
Tunes to radio stations with AUDIO/VCR set to AUDIO. See  
Page 16.  
Manual Tuning: Press once to select the next higher or  
lower frequency. Or, press and hold down to rapidly change  
frequencies.  
Automatic Tuning: To search for the next higher or lower  
station, release + TUNING –when the frequency starts to  
change. The receiver searches up or down the band until it  
finds a strong station.  
– STATION +  
Press to move the next higher or lower memory location with  
AUDIO/VCR set to AUDIO. See Page 16.  
CD Player Section  
CD POWER  
Turns the CD player on and off (only for CD players having  
the CONTROL IN/OUT feature).  
|
and  
|
Returns to the beginning of the current track or advances to  
the next track.  
– DISC SELECT +  
Selects discs in a multi-play CD changer.  
Note: Some CD players might not be selected by DISC  
SELECT.  
Plays the CD.  
Stops playback.  
 
23  
Using the Remote Control  
Tape/VCR Section  
Before operation:  
• Set AUDIO/VCR to AUDIO for a cassette deck or to VCR for a VCR.  
• For a cassette deck, select TAPE 2 MONITOR or VCR/TAPE 1.  
• For a dual cassette deck, select DECK 1 or DECK 2. If you use a single  
cassette deck, press DECK 2.  
Press to start normal play.  
Press to play the reverse side of an auto-reverse cassette  
deck.  
Press to cancel the current function.  
and  
For a cassette deck, lets you quickly locate and play the  
beginning of recorded material during play.  
When the tape is stopped, lets you rapidly search forward or  
backward to locate a specific section of the tape.  
For a VCR, lets you rapidly view a tape either forward or  
backward.  
DECK 1/DECK 2  
TAPE POWER  
– VCR CH +  
TV/VCR  
Selects Deck 1 or Deck 2 when you use a dual cassette deck  
with AUDIO/VCR set to AUDIO.  
Turns on the connected VCR with AUDIO/VCR set to VCR;  
turns on the cassette deck with AUDIO/VCR set to AUDIO.  
Moves to the next higher or lower channel with AUDIO/VCR  
set to VCR.  
Selects between normal TV viewing and VCR input with  
AUDIO/VCR set to VCR.  
TAPE SELECT  
Selects cassette 1 to 6 for a multi-cassette changer.  
 
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 Radio Shack store for assistance.  
Problem  
Cause  
Solution  
Power does not turn on.  
• Power cord is disconnected.  
• Protection circuit is activated.  
• Plug in the power cord.  
• Unplug the power cord, then plug it in  
again.  
• Static discharge has affected control. • Unplug the power cord, then plug it in  
again. (If static electricity is a prob-  
The receiver does not respond to  
button presses.  
lem, try to use the remote control as  
much as possible.)  
No sound.  
• Incorrect connections.  
• Check and correct the connections.  
• Press MUTING.  
• The mute function is activated.  
• The volume is turned down.  
• Speaker wires are disconnected.  
• Neither set of speakers is selected.  
• Turn up the volume.  
• Connect the speaker wires.  
• Press in SPEAKERS A or B.  
No picture when you select a video  
source.  
• The selected video source is not set • Correct the problem with the selected  
correctly.  
video source.  
• Incorrect connections.  
• Station not correctly tuned.  
• Antenna not connected.  
• Correct the connections.  
• Tune to a stronger station.  
• Connect the antenna.  
High noise level.  
• FM antenna still coiled or is not point- • Stretch both ends of the antenna taut  
ing in the correct direction. and reposition the antenna.  
• AM loop antenna not pointing in the • Adjust the AM loop antenna.  
correct direction.  
• Noise is coming from another electri- • Try using an AC line noise filter to  
cal appliance.  
reduce the noise.  
Tuning does not automatically stop  
when searching for FM stations.  
• Stations are too weak.  
• Use a better antenna.  
Cannot make copies of video tapes.  
Tapes are protected by a copy • You cannot make a good copy.  
restriction method.  
• Video connections are incorrect.  
• Check and correct the connections.  
Press RETURN to return the controls to the following settings.  
Returning Controls to  
Factory Defaults  
Tape 2 Monitor  
Source  
Off  
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  
Muting  
Off  
Off  
Off  
Super Bass  
 
25  
Care and Maintenance  
Your STAV-3370 Digital Synthesized A/V Surround 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  
CLEANER  
receiver.  
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  
destroy 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 Radio  
Shack 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 Radio Shack 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 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)  
Dynamic Power Output (2 Ohms/4 Ohms/8 Ohms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 Watts/250 Watts/150 Watts  
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±8 dB (150 Hz)  
Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±8 dB (10 kHz)  
Super Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+8 dB (80 Hz)  
Signal-to-Noise Ratio (IHF, Short Circuited, A Network)  
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 dB  
CD, LD, VCR/TAPE 1, Tape 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 dB  
Signal-to-Noise Ratio (EIA, at 1 Watt, 1 kHz)  
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 77 dB  
CD, LD, VCR/TAPE 1, Tape 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340 Watts, 500 VA (UL)  
AC Outlet Ratings Switched . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total 100 Watts (0.8 Amps) Maximum  
Dimensions (HWD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61/8 × 169/16 × 1113/16 Inches  
(155 × 420 × 300 mm)  
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 lbs, 10 oz (8 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 22.  
Control  
Page  
BALANCE  
BASS  
15  
14  
CD  
14  
DISPLAY OFF  
FM MONO  
FM/AM  
17  
17  
16  
LD  
14  
MEMORY  
MULTI-JOG  
NORMAL  
PHANTOM  
PHONES  
PHONO  
16  
16  
21  
21  
15  
14  
POWER  
RETURN  
SELECT  
SFC MODE  
14  
25  
16  
20  
SPEAKERS A and B  
SUPER BASS  
TAPE 2 MONITOR  
TREBLE  
14  
14  
14, 18  
14  
TUNER  
15  
TUNING  
23  
VCR/TAPE 1  
VOLUME  
14, 18  
14  
WIDE  
21  
 
30  
Notes  
 
31  
RADIO SHACK LIMITED WARRANTY  
This product is warranted against defects for 2 years from date of purchase from Radio  
Shack company-owned stores and authorized Radio Shack franchisees and dealers.  
Within this period, we will repair it without charge for parts and labor. Simply bring your  
Radio Shack sales slip as proof of purchase date to any Radio Shack store. Warranty  
does not cover transportation costs. Nor does it cover a product subjected to misuse or  
accidental damage.  
EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS WARRAN-  
TIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURA-  
TION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. Some states  
do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limi-  
tation(s) or exclusion(s) may not apply to the purchaser.  
This warranty gives you specific legal rights and you may also have other rights which vary from  
state to state.  
We Service What We Sell  
9/94  
RADIO SHACK  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
<ARB1484-A>  
7A5  
Printed in Japan  
 

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