Optimus SYSTEM 748 User Manual

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Mini Stereo Component System

Cat. No. 13-1296

OWNER’S MANUAL

Please read before using this equipment.

SYSTEM 748

Sys t em 748

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FEATURES

Your Optimus System 748 Mini Stereo
Component System o ffers all the ver­satile features you need for excellent
stereo sound and entertainme nt, com ­bined in one compact package.

The system includes a 3-disc carousel
CD changer with 32-track programma­ble memory, an AM/FM stereo tuner
with 20-station presets, a dual cas­sette player with high-speed dubbing
and auto-stop, and two 3-way speak­ers with 6-inch woofers, 2-inch mid­range speakers, and piezo tweeters.

You can operate many of the system’s
functions with its remote control.

AM/FM Stereo Tuner

Memory Tunin

easily select up t o 10 AM and 1 0 FM
radio stations.

— lets you store and

Automatic CD Chan

load and play up to three CDs.

Automatic Search

locate and play any track on the load­ed CDs.

Audible Search

cate a particular section of a track
while it is playing.

Random P l a

ed CDs’ tracks in random order.

Repeat Pla

all tracks on a single CD, all loaded
CDs, or a programmed sequence.

Pro

rammable Pla

gram up to 32 selections (tracks or
CDs) to play in any order you choose.

5- or 3-Inch CD Compatible

you play either type of CD.

æ

æ

æ

lets you quickly lo-

plays all of the load-

æ

repeats a single track,

æ lets you

er

lets you quickly

æ lets you pro-

æ lets

CD Player

Eight-Times Oversamplin

proves the CD’s sound by multiplying
the standard 44.1 kHz sampling rate
by eight and using a digital filter to re­duce or eliminate high-frequency dis­tortion.

1-Bit DAC

to-analog conversion circuitry to accu­rately reproduce all sound levels w ith
virtually no distortion.

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— uses the latest in digital-

RadioShack and Optimus are registered trademarks used by Tandy Corporation.

— im-

© 1997 Ta ndy Corporation.

All Rights Reserved.

Dual Cassette Player

Multiple Source Recordin

you record onto a cass ette tape from
the CD player, a cassette tape, or the
radio.

Normal or Hi

lets you dub tapes at normal or twice
the normal speed.

h-Speed Dubbing

— lets

æ

CAUTION

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Consecutive Play æ automatically
plays one side of two tapes in se­quence.

Auto-Stop —

protects the tape and
tape-handling parts by automatically
stopping the tape when it reaches the
end.

Note: The System 748 requires two
AAA batteries (not supplied) for the re­mote control and two AA batteries (not
supplied) for system backup.

Important: Most material on compact
discs and prerecorded tapes is copy­righted. Unauthorized duplication of
copyrighted material is a violation of
the copyright laws of most countries
and such duplication may result in
fines and/or imprisonment. Note, how­ever, that in the United States, it is not
a violation of U.S. copyright laws for a
consumer to use an audio recording
device to duplicate musical recordings
for noncommercial (personal) use.

Compact discs that you
can play on your sys­tem’s CD player have
this mark on them:

Warning: To prevent fire or s hock
hazard, do not expose this prod­uct to rain or moisture.

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE­ABLE PARTS INSIDE. REFER SERVIC­ING TO QUALIFIED PERSONNEL.

This symbol is inten ded to alert yo u
to the p r es en c e o f un in su lated dan ­gerous voltage within the product’s
enclosure that mi ght be of suff icient
magnitude to constitute a risk of
electric shock. Do not open the
product’s case.

This symbol is intended to inform
you that important operating and

!

maintenance instructions are in­cluded in the literature accompany­ing this product.

!

Warnings:

• This system uses a laser light
beam. Only a qualified service
person should remove the cover
or attempt to service this device,
due to possible eye injury .

We recommend you record your sys­tem’s serial number here. The number
is on the back panel.

Serial Number: ________________

• The use of controls, adjustm ents,
or procedures other than those
specified herein may result in haz­ardous radiation exposure.

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FCC INFORMATION

This system complies with the limits
for a Class B digital device as speci­fied in Part 15 of
limits provide reasonable protection
against TV or radio interference in a
residential area. However, your sys­tem might cause TV or radio interf er­ence even when it is operating
properly.

To eliminate interference, you can try
one or more of the following corrective
measures.

• Reorient or relocate the TV or ra­dio’s receiving antenna.

FCC Rules

. These

• Increase the distance between the
system and the TV or radio.

• Use outlets on different electrical
circuits for the system and the TV
or radio.

Consult your local RadioShack store if
the problem still exists.

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CONTENTS

Preparation .................................................................................................................... 6

Connectin
Connectin
Connectin
Installin
Installin
Usin

Basic Operation ............................................................................................................ 9

Usin

Tuner Operation .......................................................................................................... 11

Automatic Tu nin
Memory Tunin

CD Player Operation ................................................................................................... 14

Loadin
Selectin
Playin
Chan

Automatic Skip ...................................................................................................... 15

Audible Search ...................................................................................................... 16

Random Play .......................... .. ............................................................................. 16

Repeat Play ........... .. ............ ........... ............ .. ............ .. ........................................... 17

Pro

CD Care Tips ......................................................................................................... 19

Cassette Deck Operation . .......................................................................................... 20

Loadin
Playin
Usin
Recordin

Tape Tips ............................................................................................................... 24

Care and Maintenance ............................................................................................... 25

Cleanin
Resettin

Specifications ............................................................................................................. 27

the Speakers ........................................................................................ 6

the FM Antenna .................................. .. .................... .. .................... .. ... 6

to Power ............................................................................................... 6

the System’s Backup Batteries ................................................................ 7

the Remote Control’s Batteries ................................................................ 7

Headphones ............ .. .......... .............................. .. .......... .. .......... .. .......... .. ...... 8

Listenin

the Remote Control ..................................................................................... 10

rammed Play .................................................................................................. 17

Pro
Reviewin
Erasin

Consecutive Play ........................................................................................ 21

Dubbin
Recordin
Recordin

Preventin
Erasin
Restorin

Safely ................................................................................................ 8

.................................................................................................. 12

..................................................................................................... 12

a CD ........................................................................................................ 14

a CD ...................................................................................................... 14

a CD ......................................................................................................... 15

CDs During Playback ............................................................................ 15

ramming and Playing a Sequence of Tracks ............................. .. .. ......... 17

the Programmed Sequence .......................................................... 18

the Programmed Sequence .............................................................. 18

a Cassette Tape .......... .......... .. ................................................... .. ........... 20

a Cassette Tape ....................................................................................... 20

on a Cassette ....................................................................................... 21

(Copying) Cassette Tapes ............................................................... 22

from a CD ..................................................................................... 23

from the Tuner .............................................................................. 23

Accidental Erasure ....................................................................... 24

a Cassette Tape ................................................................................ 24

Tape Tension and Sound Quality ................................................... 24

the Tape- Handling Parts ........................................................................ 26

the System ............................................................................................ 26

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PREPARATION

Complete all other connections

Note:

before you connect the system to AC
power and turn it on.

CONNECTING THE
SPEAKERS

show speaker connecti ons

1. Press the red speaker terminal tab
labeled
back of the system, put the
stripped end of the right speak er ’s
striped wire into the t erminal, then
release the tab.

SPEAKER R

+

on the

CONNECTING THE FM
ANTENNA

Press the black FM antenna terminal
tabs labeled
of the system , put the stripped end of
the supplied FM antenna wires into
the terminals, then release the tabs.

show antenna terminals locati on

FM ANTENNA

on the back

CONNECTING TO
POWER

After you complete all other connec­tions, plug the system’s power cord in­to a standard AC o utlet. STANDBY
lights.

2. Press the black speaker terminal
tab labeled
back of the system, put the
stripped end of the right speak er ’s
other wire into the terminal, then
release the tab.

3. Repeat Steps 1 and 2 to connect
the left speaker to the

+

and

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SPEAKER R

-

terminals.

-

on the

SPEAKER L

show STANDBY indicator lit
w/callout arrow

Warnin

the power cord plug’s blades are po­larized and fit a polarized AC outlet
only one way. If you have difficulty in­serting the plug, do not force it. Turn it
over and reinsert it.

To prevent electric shock,

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INSTALLING THE
SYSTEM’S BACKUP
BATTERIES

To retain the preset radio stations dur­ing an AC power loss , insta ll two al ka­line AA batteries (such as Cat. No. 23-

557) into the system’s battery com­partment.

1. Push in the battery compartment
cover’s tab and lift off the cover.

Show battery cover
being removed

2. Put the AA batteries into the com­partment as indicated by the po­larity symbols (+ and –) marked
inside.

3. Replace the cover.

We recommend you replace the sys­tem’s backup batteries every year to
ensure it retains the preset radio sta­tions.

INSTALLING THE
REMOTE CONTROL’S
BATTERIES

The remote control requires two AA A
batteries (not supplied) for power. We
recommend alkaline batteries, such
as RadioShack Cat. No. 23-555 for
the best performance and longest life.

1. Press the tab in the direction of
the arrow and lift off the battery
compartment cover.

Show battery cover
being removed

Cautions:

• Use only fresh batteries of the re­quired size and recommended
type.

• Never leave dead or we ak batter­ies in the remote control. Batteries
can leak chemicals that can cor­rode the control.

• Do not mix old and new batteries,
different types of batteries (stan­dard, alkaline, or rechargeable),
or rechargeable batteries of differ­ent capacities.

2. Insert the batteries as indicated by
the polarity symbols (
marked inside.

show batteries being instal led

3. Replace the cover.

and -)

+

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Caution: If you are not going to use
the remote control for a month or
more, remove its batteries. Batteries
can leak damaging chemicals.

You can use the remote control up to
a distance of about 25 feet. If the re­mote control operates erratically or
does not work, replace both batteries.

USING HEADPHONES

You can use headphones (not sup­plied) to listen in privacy. Insert the
headphones’

PHONES

to the

show PHONES jack location

1

/8-inch (3.5 mm) plug in-

ack.

j

Listening Safely

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

• Do not listen at extremely high
volume levels. Extended high­volume listening can lead to per­manent hearing loss.

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

• 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.

Notes:

• Connecting headphones automat­ically disconnects the speakers.

• Your local RadioShack store sells
a wide selection of headphones.

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〈

show location of

VOLUME

show location of

X-BASS

show location of

STEREO WIDE

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BASIC OPERATION

Follow these steps to operate your
system.

1. Press

POWER

to turn on the sys­tem. STANDBY turns off, the
display lights, and the last se­lected system settings appear.

show location of
POWER b u tto n

2. Set

TAPE/TUNER/CD

to select the
mode, so appears around
the selected mode.

show location of
TAPE/TUNER/CD switch

3. If you selected

TUNER

, see “Tuner
Operation” on Page 11 for how to
select a station.

4. Adjust

VOLUME

/

〉

to a

comfortable listening level.

5. To emphasize bass s ounds, press

X-BASS

X-BASS

bass sounds, press

so appears around

. To return to normal

X-BASS

a

ain

6. To emphasize the stereo effect,

STEREO WIDE

press
pears around

so ap-

STEREO WIDE

. To

return to normal stereo effect,

STEREO WIDE

press

.

a

ain

.

If you selected

TA PE

or

CD

, see
“Cassette Deck Operation” on
Page 20 or “CD Player Operation”
on Page 14 for how to play a CD
or cassette tape.

7. To turn off the system, press

POWER

. STANDBY lights.

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