CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR
BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of
important operating and maintenance (servicing) instructions in the literature accompanying the
Appliance.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.
DO NOT OPEN
P/N: 3828RCD015A
IMPORTANT SAFETY INSTRUCTIONS
CAUTION:"Note to CATV system installer:
> Read all of these Instructions.This reminder is provided to call the CATV system installer’s
> Save these Instructions for later use.attention to Section 820-40 of the NEC which provides guidelines
> Follow all Warnings and Instructions marked on the audiofor proper grounding and, in particular, specifies that the cable
equipment.ground shall be connected to the grounding system of the building,
1) Read Instructions — All the safety and operating instructions
should be read before the product is operated.
2) Retain Instructions — The safety and operating instructions
should be retained for future reference.
3) Heed Warnings — All warnings on the product and in the
operating instructions should be adhered to.
4) Follow Instructions — All operating and use instructions
should be followed.
5) Cleaning — Unplug this product from the wall outlet before
cleaning. Do not use liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.
6) Attachments — Do not use attachments not recommended by
the product manufacturer as they may cause hazards.
7) Water and Moisture — Do not use this product near water _ for
example, near a bath tub, wash bowl, kitchen sink, or laundry tub; in
a wet basement; or near a swimming pool; and the like.
8) Accessories — Do not place this product on an unstable cart,
stand, tripod, bracket, or table. The product may fall, causing
serious injury to a child or adult, and serious damage to the product.
Use only with a cart, stand, tripod, bracket, or table recommended
by the manufacturer, or sold with the product. Any mounting of the
product should follow the manufacturer’s instructions, and should15) Lightning — For added protection for this product during a
use a mounting accessory recommended by the manufacturer.lightning storm, or when it is left unattended and unused for long
9) A product and cart combination should be moved with care.periods of time, unplug it from the wall outlet and disconnect the
Quick stops, excessive force, and uneven surfaces may cause theantenna or cable system. This will prevent damage to the product
product and cart combination to overturn.due to lightning and power-line surges.
10) Ventilation — Slots and openings in the cabinet are providedor electric shock.
for ventilation and to ensure reliable operation of the product and to18) Object and Liquid Entry — Never push objects of any kind
protect it from overheating, and these openings must not beinto this product through openings as they may touch dangerous
blocked or covered. The openings should never be blocked byvoltage points or short-out parts that could result in a fire or electric
placing the product on a bed, sofa, rug, or other similar surface.shock. Never spill liquid of any kind on the product.
This product should not be placed in a built-in installation such as a19) Servicing — Do not attempt to service this product yourself as
bookcase or rack unless proper ventilation is provided or theopening or removing covers may expose you to dangerous voltage
manufacturer’s instructions have been adhered to.or other hazards. Refer all servicing to qualified service personnel.
11) Power Sources — This product should be operated only from20) Damage Requiring Service — Unplug this product from the
the type of power source indicated on the marking label. If you arewall outlet and refer servicing to qualified service personnel under
not sure of the type of power supply to your home, consult yourthe following conditions:
product dealer or local power company. For products intended toa) when the power-supply cord or plug is damaged.
operate from battery power, or other sources, refer to the operatingb) if liquid has been spilled, or objects have fallen into the product.
instructions.c) if the product has been exposed to rain or water.
12) Grounding or Polarization — This product may be equippedd) if the product does not operate normally by following the
with a polarized alternating-current line plug (a plug having oneoperating instructions. Adjust only those controls that are covered
blade wider than the other). This plug will fit into the power outletby the operating instructions as an improper adjustment of other
only one way. This is a safety feature. If you are unable to insert thecontrols may result in damage and will often require extensive work
plug fully into the outlet, try reversing the plug. If the plug shouldby a qualified technician to restore the product to its normal
still fail to fit, contact your electrician to replace your obsolete outlet.operation.
Do not defeat the safety purpose of the polarized plug.e) if the product has been dropped or damaged in any way.
13) Power-Cord Protection — Power-supply cords should bef ) when the product exhibits a distinct change in performance
routed so that they are not likely to be walked on or pinched bythis indicates a need for service.
items placed upon or against them, paying particular attention to21) Replacement Parts — When replacement parts are required,
cords at plugs, convenience receptacles, and the point where theybe sure the service technician has used replacement parts specified
exit from the product.by the manufacturer or have the same characteristics as the original
14) Outdoor Antenna Grounding — If an outside antenna orpart. Unauthorized substitutions may result in fire, electric shock, or
cable system is connected to the product, be sure the antenna orother hazards.
cable system is grounded so as to provide some protection against22) Safety Check — Upon completion of any service or repairs to
voltage surges and built-up static charges. Article 810 of thethis product, ask the service technician to perform safety checks to
National Electrical Code, ANSI/NFPA 70, provides information withdetermine that the product is in proper operating condition.
regard to proper grounding of the mast and supporting structure,23) Wall or Ceiling Mounting — The product should be mounted
grounding of the lead-in wire to an antenna discharge unit, size ofto a wall or ceiling only as recommended by the manufacturer.
grounding conductors, location of antenna-discharge unit,24) Heat — The product should be situated away from heat sources
connection to grounding electrodes, and requirements for thesuch as radiators, heat registers, stoves, or other products
grounding electrode.(including amplifiers) that produce heat.
as close to the point of cable entry as practical.”
ANTENNA
LEAD IN
WIRE
GROUND
CLAMP
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)
ELECTRIC
SERVICE
EQUIPMENT
NEC-NATIONAL ELECTRICAL CODE
16) Power Lines — An outside antenna system should not be
located in the vicinity of overhead power lines or other electric light
or power circuits, or where it can fall into such power lines or
circuits. When installing an outside antenna system, extreme care
should be taken to keep from touching such power lines or circuits
as contact with them might be fatal.
17) Overloading — Do not overload wall outlets, extension cords,
or integral convenience receptacles as this can result in risk of fire
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
Read this section before setting up or operating your new music system
The Techwood DD81 music system is a “state-of-the-art” digital home theater music system. It is equipped
with built-in, Dolby Digital Surround Sound, and is ready for the addition of digital audio/video components
such as DVD, DSS (digital satellite) and HDTV (high definition TV). This section describes some of the
features and Important things you need to know before proceeding with set-up or operation.
The DD81 is equipped with three built-in music sources that can be enjoyed by simply pressing one of the
corresponding function buttons on the front panel or remote control after initial set-up has been completed.
Tuner Plays AM and FM Stereo radio broadcasts
CD Plays music CD’s
Tape Plays and records cassette tapes
You can also connect optional audio/video components to the DD81 and create a true “Home Theater”
experience in your home. This allows the audio sound from the video components to play through the
DD81 music system. You can connect up to three of the following video components:
TV/AUX Television (regular or HDTV), Cable or Satellite Boxes
DVD Digital video disc player
VCR Video cassette recorder/player
To enjoy “Home Theater” surround sound, the Techwood DD81 is equipped with three different types of
Dolby Surround Sound plus, two simulated surround modes. The type of surround sound used to create
your “Home Theater” experience will depend on the video component being played, the type of audio
connection (analog or digital) made to the rear of the DD81 jack panel and the source material being
played. To enjoy true Dolby Surround Sound, the source material must be recorded or broadcast in either
Dolby Pro Logic or Dolby Digital Surround Sound. Source material recorded or
broadcast in stereo, such as radio broadcasts, CD’s, cassette tapes or TV programs can be played using
the Hall or Theater Simulated surround sound modes.
Surround Sound Modes
1) Hall (simulated)
2) Theater (simulated)
3) Dolby 3 Stereo
4) Dolby Pro Logic
5) Dolby Digital (Digital connection and Dolby Digital source required)
The first four types of surround sound will operate when using an analog, stereo audio signal from the tuner,
CD, cassette, TV, VCR, cable or satellite box.
The fifth type, Dolby Digital, will only operate when a digital component such as a DVD player, Digital Cable
Box, Digital Satellite (DSS) or HDTV is connected to one of the three digital audio inputs on the rear of the
DD81 and when a program or disc encoded in Dolby Digital Surround Sound is played.
IMPORTANT: Dolby Digital Surround Sound will not operate with an analog audio signal from the
tuner, CD, cassette, standard TV, VCR or cable box.
Since the DD81 is ready for the addition of digital audio/video components such as a DVD player, High
Definition TV (HDTV) or Digital Cable or Satellite Box, there are digital audio input jacks on the rear of
the unit. Digital audio inputs are included for the AUX/TV and DVD functions. This allows you to connect
up to two digital audio/video components – one to the AUX/TV function and another to the DVD function.
OPTICAL
AUDIO
COAXIAL
AUDIO
3
INTRODUCTION
There is also a Digital Input selector on the front panel and remote control. If you are connecting
any audio/video components to the AUX/TV or DVD inputs, during the initial set-up and before
operating the unit, you must select the type of audio input signal used for each component.
STEREO DIRECTSTEREO DIRECT
DIGITAL INPUTDIGITAL INPUT SURROUND MODESURROUND MODE
BASSBASSTREBLETREBLEBALANCEBALANCE
MODE/RIFMODE/RIF REC/PAUSEREC/PAUSE
Use the Digital Input selector on the front panel or on the remote control to select between
analog and digital inputs. This must be done when using the AUX/TV and/or DVD functions
on the DD81. Once the input signal is set for each of these functions, the DD81 will remember
the input type for all future uses. Specific instructions for connecting digital audio/video
components to the DD81 are included below. It is recommended you read these instructions
before starting set-up.
Digital audio input jacks for connecting digital audio/video components
There are three digital input jacks and one digital output jack on the rear of the DD81. To enjoy
the built-in Dolby Digital Surround Sound feature, you must use a digital connection when
connecting a digital audio/video component such as a DVD player or digital cable box.
To connect a DVD player, use a single coaxial cable with RCA type jacks on both ends (available
at your local electronics store). Connect one end to the Digital Coaxial audio output on the DVD
player and the other end to the Digital Coaxial audio input on the rear of the DD81 (see page 8 for
connection diagram).
To connect a digital TV (HDTV), cable or satellite box, use a coaxial or optical audio cable (available
at your local electronics store). Connect one end to the Digital audio output on the TV/cable/satellite
box and the other end to the Digital audio input marked TV/AUX on the rear of the DD81.
(Note, some digital cable and satellite boxes do not have digital audio outputs. In this case, you
should connect the box to the DD81 using a standard analog audio cable with dual RCA type jacks
on each end. Connect one end to the two analog audio output jacks on the rear of the box and the
other end to the TV/AUX analog audio input jacks on the rear of the DD81(see pg. 9 for connection
diagram).
Digital Input Selector
If you connect any audio/video component to the AUX/TV or DVD audio inputs on the rear of the
DD81 (ie: TV, DVD, cable/satellite box), you must select the type of audio signal used for each
component connected. This must be done during initial set-up and before operating the DD81.
Using the Digital Input selector on the front panel or remote control, select the appropriate input
type used as follows:
Function Select Audio Input Signal Used
AUX/TV Analog – Optical – Coaxial
DVD Analog - Coaxial
After this first-time setting, the DD81 will memorize the type of audio input selected for all future uses.
Important: If you connect audio/video components to the AUX/TV or DVD functions of the DD81 and
after initial set-up you cannot hear audio sound, check which type of audio input has been selected.
If the audio input selected does not match the type of audio input actually used, you will not hear any
sound. Press the Digital Input Selector button one time to see which input has been selected. With
the input still illuminated in the display, press again to change the input.
If you have any questions about operating the DD81 home theater music system, call the
Techwood product support center at 888-440-3465, Monday to Friday, 8AM – 4PM CST.
4
SPEAKER CONNECTIONS AND SET-UP
Speaker connection
Connect all speakers as illustrated below.
IMPORTANT NOTE: Use speakers that are
rated 8 ohms or higher and make sure that the
speaker polarity is correct (Red wires to Red
terminals Black wires to Black terminals).
Front Speaker
(Left)
L
E
F
T
R
I
G
H
T
Rear Speaker
(Left)
L
R
SPEAKER
L
R
Front Speaker
(Right)
Rear Speaker
(Right)
Speaker Set-up
IMPORTANT NOTE: Before operating the system
you must first set the speaker configuration by
using the following procedures.
1. Press the SPEAKER SETUP button to enter the
speaker setup mode. “SUBW YES(or NO)” appears
on the display. Note: If a powered subwoofer is
used select “SUBW YES”. If no powered subwoofer
is used select “SUBW NO”.
2. Use the PRESET DOWN/UP button or MULTI JOG
to select “SUBW YES” or “SUBW NO”. Press the
CLEAR/SET button to confirm it (or use the
ADJUST +/- buttons and SET button on the remote
Control).
3. Continue the speaker set-up procedure for center,
front and rear speakers as described below.
• CENTER SPEAKER Mode
- LARGE : Use this mode with a large center
speaker. The center channel’s output is
full range.
- SMALL : Use this mode with a small center
speaker.
- NONE : Use this mode if there is no center
speaker. The center channel signal will
be divided between the front L and R
Speakers.
Center Speaker
Speaker Positioning
The installation position of speakers differ according
to the size and acoustics of the listening room. While
actually listening to a program source, try various
speaker positions to determine which layout provides
the best surround effect.
132
4
6
5
1. Front Left Speaker
2. Front Right Speaker
3. Center Speaker
4. Rear Left Speaker (Not magnetically shielded)
5. Rear Right Speaker (Not magnetically shielded)
6. Viewing/Listening position. The optimum listening
position should be in the middle of all of
the speakers.
Connection of Optional Subwoofer
An RCA type jack marked "SUBWOOFER PRE
OUTPUT" is provided on the back of the unit for
connecting an optional powered Subwoofer.
• Subwoofer pre out signals are not amplified.
• If a speaker is connected directly to the PRE
OUTPUT jack without a built in amplifier, no
sound comes from the speaker.
• Subwoofer speakers are optional and are not
required.
• FRONT SPEAKER Mode
- LARGE : Choose if full range floor standing or
bookshelf front speakers are used.
- SMALL : Choose if small satellite front speakers are
used. When using small speakers, it is
recommended that a powered Subwoofer
be added to play low frequencies.
• REAR(SURR) SPEAKER Mode
- SMALL : Use this mode with a small rear
(surround) speaker.
- NONE : Use this mode if there is no rear
(surround) speaker. The rear channel signal
will be divided between the front L and R
speakers.
5
AM & FM ANTENNA CONNECTIONS
FM Antenna
AM loop
Antenna
Connect the supplied FM dipole antenna (shaped like
a “T”) to the ANTENNA terminals marked “FM” and
“GND” on the rear of the unit and position it for
FM indoor
dipole antenna
Position
it for the
best
reception
GND
FM
AM
best reception.
AM Antenna
To receive AM radio broadcasts, you must connect
the supplied AM loop antenna to the terminals
marked “AM” on the rear of the unit. Position it for
best reception.
TV CONNECTIONS (ANALOG)
ANTENNA OR CABLE BOXANTENNA OR CABLE BOX
HOW TO PLAY THE TELEVISION SOUND
THROUGH THE STEREO SYSTEM
NOTE: The following instructions only apply
if your television has variable audio outputs or
has been set to operate in variable output mode.
If your TV has fixed audio outputs, the volume is
controlled by the DD81.
After making connections as shown above follow
these instructions to obtain the best performance.
1. Set the volume control on the stereo at about 15
(1/2 of maximum volume).
2. Set the SURROUND MODE to the desired
pattern-ANALOG STEREO(STEREO DIRECT),
HALL, THEATER, PRO LOGIC or 3 STEREO.
TELEVISIONTELEVISION
ANT IN
AUDIO OUT
5. Select the channel desired and adjust the
listening level using the volume control on the
Television.
Do not adjust the listening level with the controls
on the stereo. lf your television is equipped with a
hand held remote control, you can use the remote
control to operate the television including
adjustment of volume.
6. When you have finished watching TV, be certain
to turn off both the television and stereo.
Remember to read the television operating manual
so you can enjoy all of the features of your
television. lf you have followed these instructions
and the system is not operating properly, contact
the dealer where you obtained the system before
calling a warranty center.
3. Turn the television on by depressing the power
Button.
4. Press AUX(TV)/VCR/DVD button repeatedly until
the “AUX/TV” appears on the display.
Important: Most malfunctions are the result of
improper installation or operating procedure and are
not covered under the stereo or television
warranties.
6
VCR & TV CONNECTIONS (ANALOG)
TELEVISIONTELEVISION
(yellow)
VIDEO
IN
AUDIO
ANT IN
ANTENNA OR CABLE BOXANTENNA OR CABLE BOX
VCRVCR
OUT
ANT IN
(yellow)
VIDEO
(yellow)
VIDEO
IN
OUT
NOTE: All VIDEO IN/OUT
jacks are yellow in color.
MONITOR
RECORD
OUT
OUTIN
NOTE: When connecting
more than one video
component to the DD81
(ie: VCR and DVD player)
it is easier to use the yellow
VIDEO MONITOR OUT jack.
This allows all video signals
(VCR and DVD) to be sent
through the DD81 to the
TV using just one RCA
video input on the TV.
VCRINAUX/TVINDVD
OUT
TV OUT
AUDIO
IN
IN
AUDIO
OUT
7
DVD & TV CONNECTIONS (DIGITAL)
NOTE: Solid lines = suggested method of connection
Dotted lines = alternate method of connection
TELEVISIONTELEVISION
(yellow)
VIDEO
or
or
NOTE: If your TV
and DVD changer
have s-video or
component video
jacks, you can
connect the video
directly to your
TV.
DVD CHANGERDVD CHANGER
IN
COMPONENT VIDEO
IN
S-VIDEO
IN
S-VIDEO
OUT
COMPONENT VIDEO
OUT
COMPOSITE
NOTE: All VIDEO IN/OUT
jacks are yellow in color.
RECORD
MONITOR
OUT
OUTIN
NOTE: When connecting
more than one video
component to the DD81
(ie: VCR and DVD player)
it is easier to use the yellow
VIDEO MONITOR OUT jack.
This allows all video signals
(VCR and DVD) to be sent
through the DD81 to the
TV using just one RCA
video input on the TV.
VCRINAUX/TVINDVD
OUT
IN
(yellow)
VIDEO
OUT
ANALOG
AUDIO
OUT
(orange)
COAXIAL
AUDIO
OUT
OPTICAL
AUDIO
NOTE: All COAXIAL AUDIO
IN jacks are orange in color.
DIGITAL
COAXIAL
AUDIO
8
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