Optimus 740 User Manual

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Mini Stereo Component System

Cat. No. 13-1287

OWNER’S MANUAL

Please read before using this equipment.

SYSTEM 740

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CAUTION

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FEATURES

Your Optimus System 740 Mini Stereo
Component System offers, in one
compact package, all of the versatile
features that you need for excellent
stereo sound and entertainment.

The System 740 includes an AM/FM
stereo tuner, a dual cassette re corder
with auto-stop, speakers, and a 3­band frequency equalizer.

Its features include:

Auto-Stop

— to protect the tape and
tape-handling parts, automatically
stops the cassette tape when it finish­es.

Multiple Source Recordin

— lets
you record from the radio, another
cassette tape, or an external audio
source.

Automatic Level Control (ALC)

—
automatically adjusts the recording
level.

Consecutive Tape Pla

— plays one

side each of two tapes, back to back.

Normal or Hi

h-Speed Dubbin

—
lets you copy tapes at normal or twice
the normal speed.

3-Band Frequenc

Equa lizer

— lets
you adjust the sound to your prefer­ence and your room’s unique acous­tics.

E-Bass Control

— boosts low tones

for an emphasized bass sound.

Auxiliar

Input Jacks

— let you hear
an external audio source through your
system.

Supplied Spe akers

— let you imme-

diately begin listening to your system.

Warnin

: To prevent fire or shock
hazard, do not expose this prod uct to
rain or moisture.

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

CAUTION

ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE­ABLE PARTS INSIDE. REFER SERVIC­ING TO QUALIFIED PERSONNEL.

!

: TO REDUCE THE RISK OF

This symbol is intended to alert
you to the presence of uninsu­lated dan
the product’s enclosure that
mi
to constitute a risk of electric
shock. Do not open the prod­uct’s case.

This symbol is intended to in­form you that important operat­in

and maintenance instruc­tions are included in the litera­ture accompanyin

erous voltage within

ht be of sufficient magnitude

!

this product.

© 1996 Tandy Corporation.

Optimus is a registered trademark used by Tandy Corporation.

RadioShack is a trademark used by Tandy Corporation.

All Rights Reserv ed .

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CONTENTS

Connections ......................................................................................................... 4

Connecting the Speakers . ............................................................................... 4

Connecting an Auxilia ry Audio S ourc e ................................. ....... ............ ........ 4

Connecting an External Antenna .................................................................... 4

Connecting Power ........................................................................................... 5

Using Headphones ......................................................................................... 5

Listening Safely ........................................................................................ 5

Basic Operation ................................................................................................... 6

Turning On/Off the System ............................................................................. 6

Adjusting the Balance ..................................................................................... 6

Using the Frequency Equalizer ....................................................................... 6

Using E-Bass .................................................................................................. 7

Using the Mute Button .................................................................................... 7

Radio Operation ................................................................................................... 8

Cassette Pla

Loading a Cassette Tape ............................................................................. ... 9

Playing a Cassette Tape ................................................................................. 9

Recording on a Cassette Ta pe ...................................................................... 11

Tape Care Tips .............................................................................................. 13

an Auxiliary Audio Source ..................................................................... 14

Usin

Listening to an Auxiliary Audio Source ......................................................... 14

Recording from an Aux iliary Audio S our c e ....... .... ... .. .. . .... .. . .... .. . .... . .. .... . .. .... 14

Care and Maintenance ...................................................................................... 15

The FCC Wants You to Know ....................................................................... 16

Cleaning the Tape-Handling Parts ................................................................ 16

Specifications .................................................................................................... 17

er Operation .................................................................................. 9

Normal Play .............................................................................................. 9

Fast Forward/Rewind ............................................................................. 10

Consecutive Play .................................................................................... 10

Recording from the Radio ....................................................................... 11

Dubbing a Cassette Tape ............................................................... ..... ... 12

Preventing Accidental Erasure ............................................................... 13

Erasing a Cassette Tape ........................................................................ 13

Restoring Tape Tension and Sound Quality ........................................... 13

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CONNECTIONS

Caution:

tions to the System 740 before you
connect it to power.

Complete all other connec-

CONNECTING THE
SPEAKERS

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1. Insert the right speaker wire’s plug
into the
speaker jack on the back of the
System 740.

2. Insert the left speaker wire’s plug
into the
speaker jack on the back of the
System 740.

4 OHM SPK R

4 OHM SPK L

(right)

(left)

CONNECTING AN
AUXILIARY AUDIO
SOURCE

To connect an auxiliary audio source,
such as a TV, CD p layer, or cassette
deck, plug the audio source’s left and
right LINE OUT audio wires into the

AUX L

(left) and

jacks on the back of the System 740.

AUX R

(right) input

See “Using an Auxiliary Audio Source”
on Page 14 for how to operate a n ex­ternal audio source with the System

740.

CONNECTING AN
EXTERNAL ANTENNA

Your System 740 has two antennas.
The AM antenna is built-in, and the
FM antenna is in the powe r cord. For
improved reception, you can attach an
FM or TV antenna (not supplied) to
the 75-ohm or 300-ohm terminals on
the back of the system. Before you in­stall an external antenna, be sure to
disconnect the built-in FM antenna by
loosening the upper right antenna ter­minal and sliding out the U-shaped
connector. Then follow the instruc­tions supplied with the antenna.

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If you have an outside VHF TV anten­na, you can use a signal splitter to
connect this system and a TV to the
same antenna. Your local RadioShack
store has a wide selection of antennas
and connectors.

CONNECTING POWER

To connect power, after making all
other connections, plug your system’s
power cord into a standard AC outlet.

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Caution:

has a polarized plug (one blade is wid­er than the other). If you have difficulty
inserting the plug into the outlet, do
not force it. Turn the plug over and try
again.

Your system’s power cord

USING HEADPHONES

To listen without disturbing others, you
can connect a p air o f
reo headphones (not supplied) to the
System 740. Your local RadioShack
store has a wide selection of stereo
headphones.

1

/8-inch plug ste-

To connect headphones, plug the
headphones’

PHONES

tem 740.

Note:

Connecting headphones auto­matically disconnects the System
740’s speakers.

1

/8-inch plug into the

jack on the front of the Sys-

Listening Safely

To protect your hearing, follow these
guidelines when you use headphones.

• Set the volume to the lowest set­ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable listen­ing level.

• Do not listen at extremely high
volume levels. Extended high­volume 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.

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BASIC OPERATION

TURNING ON/OFF THE
SYSTEM

POWER

Press
The POWER indicator lights.

to turn on the system.

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To turn off the system, press
again. The POWER indicator turns off.

POWER

ADJUSTING THE
BALANCE

To adjust the soun d balance between
the left and right speakers, turn

ANCE

toward L (left) or R (right).

BAL-

USING THE FREQUENCY
EQUALIZER

You can use
to customize the sound you hear
through the speakers.

Each of the three controls l ets you ad­just the level in a specific frequency
range. Slide the control up to boost, or
down to reduce the level. If you set the
control to the center position (
frequency is unaltered.

LOW

(100 Hz) — Adjusts the frequen­cies in the low bass range (low organ
notes and bass drums). Reduces rum­ble or other low-frequency noise.

FREQUENCY EQUALIZER

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), the

MID

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(1 kHz) — Adjusts the range of
frequencies where the ear is most
sensitive (vocals).

HIGH

(6 kHz) — Adjusts high­frequency sounds (cymbals, flutes,
and violins).