Optimus SYSTEM 728 User Manual

13-127 5.fm Page 1 Wednesday, Ju ly 14, 1999 3: 59 PM

MINI STEREO COM PO N E N T SY ST EM

Cat. No. 13-1275

OWNER’S MANUAL

Please read before using this equipment.

SYSTEM 728

R

g

y

y

g

g

y

13-127 5.fm Page 2 Wednesday, Ju ly 14, 1999 3: 59 PM

FEATURES

Your Optimus System 72 8 Mini Ste­reo Compnent System is a v ersatile
and high quality sound system. Its
components include a 3-disc c arou­sel CD changer with 32-track memo­ry, AM/FM stereo tuner with 20­station presets, and dual cassette
players with high-speed dubbing.

You can operate many of the sys­tem’s function s with its r emote con ­trol. The supplied speakers which
include 5-inch woofers and tweeters,
let you immediately begin using your
system.

Its features include:

AM/FM Stereo Tuner

Selectable Electronic Graphic
Equalizer

the preset sound characteristic
curves (normal, pop, rock, and clas­sic).

Preset Tunin

store up to 20 of your favorite sta­tions for quick tuning.

Extended Bass

size low-bass sound.

æ lets you select any of

Memories

lets you empha-

æ

æ let you

CD Changer

æ

Automatic Search

ly select any track on the loaded
CDs.

Repeat Pla

track, all tracks on a single CD, all
CDs in the CD compartment, or a
programmed sequence.

Random Pla

CD’s tracks in random order.

Sequence Track Pro

lets you program up to 32 tracks to
play in any order you choose.

5- or 3-Inch CD Compatible

you play 5- or 3-inch CDs.

æ

æ

lets you quick-

repeats a single

plays all the loaded

rammin

æ

æ lets

Dual Cassette Player

Normal or High-Speed D ubb ing

lets you dub tapes at normal or twice
normal speed.

Consecutive Pla

plays one side of two tapes in se­quence.

Auto-Stop

the tape when it finishes playing or
recording and when it fast-forwards
or rewinds to the end of the side. This
protects the tape and tape-handling
parts.

æ

æ automatically

automatically stops

æ

Automatic CD Changer

load and play up to three CDs.

Opti mus and Radio Shack are reg istered trademarks used by Tandy Corporation.

2

æ lets you

© 1995 Tandy Corporation.

All Rights Reserved.

g

g

CAUTION

13-127 5.fm Page 3 Wednesday, Ju ly 14, 1999 3: 59 PM

General

let you

Auxiliary Input Jacks

connect an external audio input
source to your syst em so you can lis ­ten to or record from it.

Microphone Mixin

along with the music you are playing.

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.

æ

lets you sing

æ

mend you record your system’s
serial number here.

Serial Number:

Warnin

: To prevent fire or shock
hazard, do n o t ex p os e this system to
rain or moist u re .

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 dangerous voltage within the
system’s enclosure that might be
of suf ficient m agnitu de to co nsti­tute a r isk of el ectri c shock . Do not
open the system’s case.

This symbo l is in tended to info rm
you that important operating and

!

maintenance instructions are in­cluded in the litera ture accom pa­nying this system.

!

Warning:

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

Read this manual carefully. It will

possible eye injury.

help you get the most enjoyment
from your system.

Your system’s serial number is locat­ed on the back panel. We recom-

3

13-127 5.fm Page 4 Wednesday, Ju ly 14, 1999 3: 59 PM

FCC INFORMATION

This system complies with the limits
for a Class B digital d evice as s peci­fied 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 interfer­ence 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

. Thes e

• 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 Radio Shack store
if the problem still exists.

4

g

g

13-127 5.fm Page 5 Wednesday, Ju ly 14, 1999 3: 59 PM

CONTENTS

Preparation .......................................................................................................7

Connecting the Speakers ............................................................................7

Connecting an External Audio Source .........................................................7

Connecting an External Antenna.................................................................7

Installin g the Remote C o nt r ol’s Bat ter ies........ .... .. . .... . .. .... . .. .... . .. ... .. .... . .. .... .8

Connecting to Power...................................................................................8

Operation.......................................................................................................... 9

Turning Power On/Off..................................................................................9

Setting the Clock..........................................................................................9

Basic Operation.........................................................................................10

Using Headphones ................................... .... ..... .. ..... ..... .. ..... .. ..... ..... .. ..... ..11

Listening Safely ................................................................................... 11

Displaying the Time ...................................................................................12

Using the Electronic Graphic Equalizer.....................................................12

Using the Mute Button...............................................................................12

Using the Timer..........................................................................................12

Setting the Timer................................................................................. 12

Turning the Timer On/Off.....................................................................14

Displaying the Timer............................................................................14

Using the Sleep Timer ...............................................................................15

Using the Remote Control.........................................................................15

the Tuner.............................................................................................. 16

Usin

Manual Tuning ...........................................................................................16

Automatic Seek Tuning..............................................................................17

Memory Tu n ing............ ........................ ................ ........................ ..............17

Storing Stations in Memory................................................................. 17

Manually Tuning to a Preset Station ...................................................18

Scanning the Preset Stations..............................................................18

the CD Changer...................................................................................19

Usin

Loading a CD.............................................................................................19

Playing a CD............................ ........................ ................ ........................ ..19

Selecting Another CD................................................................................ 20

Automatic Search ......................................................................................20

Random Play.................... ........................ ................ ........................ .........20

5

13-127 5.fm Page 6 Wednesday, Ju ly 14, 1999 3: 59 PM

Repeat Play............................................................................................... 21

Repeating a Single Track.................................................................... 21

Repeating All Tracks on a Selected CD .............................................. 21

Repeating All Tracks on All Loaded CDs............................................ 21

Repeating a Programmed Sequence..................................................21

Programmed Play ......................................................................................22

Programming and Playing a Sequence of Tracks............................... 22

Reviewing the Programmed Sequence .......................................... ....22

Replacing/Adding a Track in a Programmed Sequence ..................... 23

Clearing the Programmed Sequence..................................................23

Using the Cassette Deck............................................................................... 24

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

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

Using Consecutive Play.............................................................................25

Recording.................................................................................................. 25

Dubbing Cassette Tapes.............................................. ....... ....... .........25

Copying a CD to a Cassette Tape.......................................................26

Recording from the Tuner or an External Audio Source..................... 27

Timer Re co rd in g..... ................ ................. ........................ ....................28

Microphone Mixing .................................. ................. ........................ .............29

Care and Maintenance................................................................................... 30

CD Care Tips..................... ....................... ........................ ................ .........31

Tape Tips................................................................................................... 31

Erasing a Cassette Tape.....................................................................31

Preventin g Acci d e nt a l Era s u re.............. ................ ........................ ......31

Restoring Tape Tension and Sound Quality........................................32

Cleaning the Tape Handling Parts ......................................................32

Specifications................................................................................................. 33

6

13-127 5.fm Page 7 Wednesday, Ju ly 14, 1999 3: 59 PM

PREPARATION

Complete all conn ections be-

Note:

fore connecting to AC power and
turning it on .

CONNECTING AN
EXTERNAL AUDIO
SOURCE

CONNECTING THE
SPEAKERS

1. Press the red speaker terminal
tab labeled
on the back of the system, insert
the stripped end of the right
speaker’s striped wire into the
terminal, then release the tab.

SPEAKER R. Ch

To connect an external audio source
(such as a CD player or a cassette
deck) to your system, connect the
source’s left and right line leve l out­put jacks to the
on the back of your system.

AUX IN R

and L jacks

CONNECTING AN
EXTERNAL ANTENNA

You can attach an FM or VHF anten­na (not supplied) to the 300 ohm

ANT .

terminals on t he back of t he sys-

+

tem.

EXT.

2. Press the black speaker terminal
tab labeled
on the back of the system, insert
the stripped end of the right
speaker’s other wire into t he te r­minal, then release the tab.

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

+

Ch

SPEAKER R. Ch

and

terminals.

-

-

SPEAKER L.

If you have an outside VHF TV an­tenna, you can use a s ignal splitter
with a 300-ohm output to connect
your stereo system and TV set to the
same antenna. Your local Radio
Shack store has a wide sel ection of
antennas, connectors, and splitters.

7

13-127 5.fm Page 8 Wednesday, Ju ly 14, 1999 3: 59 PM

INSTALLING THE
REMOTE CONTROL’S
BATTERIES

The remote control requires two AA
batteries (not supplied) for power.
We recommend alkaline batteries,
such as Radio Shack Cat. No. 23-

557.
Follow these steps to install batter-

ies.

1. Press down and slide the battery
compartment cover in the direc­tion of the arrow.

2. Install the batteries as indicated
by the polarity symbols (
(

) marked inside the compart-

-

ment.

+

) and

3. Replace the cover.

Caution:

the remote control for a month or
more, remove its batteries. Weak
batteries can leak damaging che mi­cals.

Note:

erratically or does not work, replace
both batteries.

If you are n ot going t o use

If the remote control operates

CONNECTING TO
POWER

After you complete all connections,
plug the music system’s supplied
power cord into a standard AC outlet.
The STAND BY indicat or lights, and

AM 12:00

CLO

the display (see “Setting the Clock”).

Warning:

the AC power cord plug’s bl ades 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.

and

To prevent electric shock,

appear on

8

CLO

〈

CLO

〈

〈

13-127 5.fm Page 9 Wednesday, Ju ly 14, 1999 3: 59 PM

OPERATION

TURNING POWER ON/
OFF

Warning:

VOLUME

set
on the system.

Press
The STAND BY indicator turns off
and the indicator above

TAPE

Notes:

• If the indicator above
or
time appear on the display.

• If the indicator above
appears, the AM or FM station
previously selected appears on
the display.

To protect your hearing,

MIN

to

POWER

AUX

, or

AUX

appears, and the

before you turn

to turn on the system .

lights.

CLO

CD, TUNER

CD, TA PE

TUNER

SETTING THE CLOCK

1. If necessary, press
and the time appear on

the display

2. Press

on the display.

,

Note:

ING

onds after you press
play . Start again from Step 2.

3. While flashes, repeatedly

press
desired hour. If you press and
hold down
advances continuously.

,

Note:

you set an AM or PM hour.

4. While flashes, repeatedly

press
desired minutes. If you press
and hold down
minutes advance continuously.

.

MEMORY

If you do not press

or within 10 sec-

stops flashing o n t he dis-

CLO

TUNING

TUNING

AM

or PM appears when

CLO

TUNING

DISPLAY

. flashes

CLO

so

TUN-

〉

MEMORY

to set the

, the hour

〉

to set the

TUNING

〉

, the

,

5. Press

MEMORY

finish setting the time, or just
wait 10 seconds.

again when you

9

13-127 5.fm Page 10 Wednesday, J uly 14, 1999 3: 59 PM

BASIC OPERATION

Follow these steps to operate your
system.

1. Press

CD, TUNER, TAPE

to select the desired audio
source.

2. If you select

TUNER

, select the
desired station (see “Using the
Tuner”).

If you select

CD, TAPE

start the selected audio source
(see “Using the CD Changer” or
“Using the Cassette Deck”).

3. Adjust

VOLUME

to a comfortable

listening level.

, or

, or

AUX

AUX

4. Adjust

BALANCE

until you can
hear the sound eq ually from the
left and right speakers.

5. Select the desired equalization
by pressing

ROCK,

or

NORMAL, POP,

CLASSIC

(see “Using
the Electronic Graphic Equal­izer”).

6. Press

E-BASS

to emphasize
bass sounds. To return to nor­mal bass sounds, press

E-BASS

again.

,

7. To turn off the system, press

POWER

so the STAND BY indi-

cator lights.

10

13-127 5.fm Page 11 Wednesday, J uly 14, 1999 3: 59 PM

USING HEADPHONES

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

Notes:

• Your local Radio Shack store
sells a wide selection of head­phones.

• Connecting headphones auto­matically disconnects the speak­ers.

1

PHONES

/8-inch (3.5 mm) plug

jack.

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.

11

g

g

ON

13-127 5.fm Page 12 Wednesday, J uly 14, 1999 3: 59 PM

DISPLAYING THE TIME

To display the clock while you use
the radio, press
to the radio display, press
again.

DISPLAY

. To return

DISPLAY

USING THE
ELECTRONIC GRAPHIC
EQUALIZER

You can select any one of four preset
sound characteristics using the sys­tem’s electronic graphic equalizer.
Each setting distinctly changes the
music’s character or tone.

USING THE MUTE
BUTTON

MUTE

The
turn off the sound. Press
to turn it off. Press
store sound.

button lets you temporarily

MUTE

once

MUTE

again to re-

USING THE TIMER

You can set the timer to automatical­ly turn on the system, play from the
tuner or a cassette tape (not from a
CD), then turn off the system.

Note:

You can us e t he s ystem while

the timer is set.

Setting Sound

NORMAL Normal sound
POP More presence

of vocals and
midran

ROCK Powerful sound

emphas izin
ble and bass

CLASSIC Sound enric hed

with heavy bass
and fine treble

12

e

tre-

Setting the Timer

1. While the current time appears
on the display, press

flashes on the display.

:

Note

press
rent time appears on the display.

TUNER

If

DISPLAY

first so the cur-

1

.

TIM

is selected,

〉

〈

ON

ON

〈〈〉

〉

F

F

〈

〈

F

13-127 5.fm Page 13 Wednesday, J uly 14, 1999 3: 59 PM

Note: If you do not press

ING

or within 10 seconds
after you press
appears from the display. Start
again from Step 1.

2. While flashes, rep eat­edly press
hour of the desired start time.

Notes:

• Press and hold down

•

3. While continues to
flash, repeatedly press

desired start time.

Note: Press and hold down

TUNING

advance the minutes.

TIM

to continuously advance

the hour.

AM

or PM appears when you

set an AM or PM hour.

to set the minutes of the

1

, dis-

TIM

TUNING

to set the

to continuously

TUN-

TUNING

TUNING

4. Press

5. While

6. While

7. When you finish setting the

2.

the display.

peatedly press
set the hour of t he desired end
time.

Notes:

• Press and hold down
the hour.

AM

•
set an AM or PM hour.

flash, repeatedly press

〉

to set the minutes of the

desired end time.

Note: Press and hold down

TUNING

advance the minutes.

alarm timer, press
return to the current time display,
or wait 10 seconds for the sys­tem to automatically return to
the current time display.

TIMOF

TIMOF

to continuously advance

or PM appears when you

TIMOF

〉

to continuously

flashes on

flashes, re-

TUNING

continues to

to

TUNING

TUNING

DISPLAY

to

13

TIM

ON

F

13-127 5.fm Page 14 Wednesday, J uly 14, 1999 3: 59 PM

Turning the Timer On/Off

1. Press

TUNER

the desired audio source.

2. If you selected
the desired station (see “Using
the Tuner”) and adjust
to a comfortable listening level.

If you selected
desired tape, press
adjust

VOLUME

listening level (see “Using the
Cassette Deck”).

3. Press

TIMER

The system turns off.

When the selected start time ap­pears on the display, the system au­tomatically turns on, plays, and turns
off at the selected end ti me. The sys­tem turns on again the next day at
the set start tim e.

TAPE

or

TUNER

TA P E

to select

, select

VOLUME

, insert the

PLAY

, and

to a comfortable

to turn on the timer.

To turn off the timer, simply press

TIMER

again.

Notes:

• The system’s controls do not
work when

TIMER

is pushed to
on. To operate the system, you
must turn off the timer.

• If you played a cassette tape
with the timer, and the timer
turns the system off before the
tape ends, press

STOP/EJECT

as soon as possible to release
the tape from the mechanism.

Displaying the Timer

To display the timer’s start time,

1

press
time appear for 10 seconds. To dis­play the timer’s finish time, press

TIMOF

for 10 seconds.

so

and the start

and the finish time appear

2

so

14

SLES

13-127 5.fm Page 15 Wednesday, J uly 14, 1999 3: 59 PM

USING THE SLEEP
TIMER

You can set the system to play up to
90 minutes, then automatically turn
off.

1. Press

2. Tune to the desired AM or FM

3. Press

4. To turn on the sleep timer, press

CD, TUNER, TAPE

to select the desired audio
source.

radio station, or start the
selected CD,
nal audio source.

tem.

and release

90

appear on the display.

To set the sleep timer to a sleep
time, press and hold down

SLEEP

time appears on the display. The
displayed sleep time decreases
in 10-minute steps.

tape, or your exter-

POWER

until the desired sleep

to turn off the sys-

SLEEP.

, or

AUX

and

USING THE REMOTE
CONTROL

The remote control’s buttons have
the same functions as the corre­sponding buttons on the main sys­tem.

To use the remote control, point it to­ward the remote sensor on the left of
the system’s AM/FM STEREO RE­CEIVER display and press the de­sired buttons.

The system turns itself off after the
amount of time you selected. To turn
off the sleep timer sooner, press

SLEEP

again so disappears

from the display.

LE

Notes:

• Mak e sure you have a clear pa t h
between the remote control a nd
the sensor.

• Weak batteries or direct sunlight
on the remote sensor might
reduce the remote control’s
operating range.

15

〉

〈〉〈

13-127 5.fm Page 16 Wednesday, J uly 14, 1999 3: 59 PM

USING THE TUNER

TUNER

Press
er. The indicator above

to use the system’s tu-

TUNER

lights.

Notes:

• The system uses a buil t-in fer­rite antenna for AM reception.
For the best AM reception,
rotate the system.

• For the best FM reception,
see “Connecting an External
FM Antenna.”

When you select

Note:

system automatically tunes to the
station that was playing when the
system was turned off or when it was
last set to

You can tune to AM or FM radio st a­tions using manual, seek, or memory
tuning.

TUNER

.

TUNER

, the

MANUAL TUNING

1. Press
desired AM or FM band.

FM

BAND

to select the

appears on the display.

AM

or

2. Use

3. Repeatedly press

FM MODE/AM BEAT

select the desired AM or FM
band’s mode.

If you selected FM:

• Press it in to select stereo.
The FM STEREO indicator
lights when you receive an
FM broadcast in stereo.

• Press it out to select monau­ral. The sound is no longer in
stereo, but reception should
improve.

If you selected AM, press it in or
out to the position that gives the
best reception.

TUNING

to tune up or down the
selected band. If you press and
hold down
the stereo tunes quickly.

TUNING

or ,

to

or

16

13-127 5.fm Page 17 Wednesday, J uly 14, 1999 3: 59 PM

AUTOMATIC SEEK
TUNING

1. Press
desired AM or FM band.

FM

2. Press
tem automatically searches up
the band and stops when i t finds
the next strong station.

BAND

to select the

appears on the display.

TUNING AUTO

. The sys-

AM

or

MEMORY TUNING

You can store up to 10 AM and 10
FM stations in mem or y.

Storing Stations in Memory

Note:

You can assign one frequency
to each memory location. When you
assign another frequency to the
same memory location, t he new fre­quency replaces the first one.

2. Using either manual or auto­matic seek tuning, select the
station you want to store, then

MEMORY

press

3. While appears on the
display, follow these guidelines
to store up to 10 stations in
memory.

Note:

within 3 seconds. If dis­appears before you make the
following entries, simply repeat
this step.

• To store stations into memory

MEM-

You must store a station

locations 1-5, press a memory
location button (1-5). The sta­tion is stored, d isap­pears, and the display shows
the frequency.

.

MEM-

MEM-

1. Press
desired AM or FM band.

FM

BAND

to select the

appears on the display.

AM

or

17

13-127 5.fm Page 18 Wednesday, J uly 14, 1999 3: 59 PM

• To store stations into memory
locations 6-10, press

+5

then

a memory location button (1

5). The station is stored,

MEM-

disappears, and the

display shows the frequency.

This increases the

Note:

memory location number by

5. For example, if you press

+5

, then press memory loca-

tion button

2

, the radio stores
the frequency you selected
into memory location 7.

(illus - show the
baloon pointing at
the +5 button

4. Repeat Steps 1-3 to program
stations in the other band.

Scanning the Preset
Stations

-

Press
the preset stations and plays each
station for 5 seconds.

Note:

quickly step through the stored sta­tions.

To stop scanning at a desired station,
within 5 seconds after the tuner stops
on that station, press
station’s memory location button.

M/SCAN

. The system scans

Repeatedly press

DISPLAY

M/SCAN

or that

to

Manually Tuning to a Preset
Station

Press the desired memory location
button (
a radio station stored in memory. For
preset stations 6 through 10, press

+5

button.

18

1

through 5) to directly select

then the des i red m em ory l ocation

13-127 5.fm Page 19 Wednesday, J uly 14, 1999 3: 59 PM

USING THE CD CHANGER

LOADING A CD

1. Press

2. Press

3. Place a CD in either (or both) of

4. After you load the CDs, press

CD

.

OPEN/CLOSE

to open the

CD compartment.

Note:

The CD carousel has
three trays, each labeled with a
number, but only two tray s s how
at a time when you open the CD
compartment.

the exposed trays, label side up.

To load a CD in the third

Note:

tray, press

CD SKIP

. The carou­sel rotates, exposing the other
tray.

OPEN/CLOSE

to close the CD
compartment. The system dis­plays the current tray number,
and the total number of tracks
and total playing time of the CD
in the tray.

PLAYING A CD

To play a CD, simply press

PAUSE

after you load it. The selected
CD begins to play from Track 1. The
display shows , the current tray

t
number, the CD’s current track num­ber, the track’s elapsed time, and the
current track number indicator flash­es. The system plays all the loaded
CDs once.

Notes:

• After you load a CD, do not
press either

SKIP

. or
before the track n umber indica­tors appear on the display. Oth­erwise

NO DISC

appears on the
display and you must reset the
CD player by pressing

CLOSE

twice (to open and then

close the CD compartment.)

• If a tray does not contain a CD,
the system skips that tray and
automatically plays the CD in
the next tray.

• To temporarily stop play, press

PLAY/PAUSE

y

. ap-pears, the
elapsed timer stops counting,
and the current track number
indicator flashes on the display.
To resume play, press

PAUSE

again.

To stop play, press

STOP

PLAY/

∇

∇

∇

OPEN/

PLAY/

.

∇

19

13-127 5.fm Page 20 Wednesday, J uly 14, 1999 3: 59 PM

SELECTING ANOTHER
CD

To select another CD, press
before or during play.

If the system is playing a CD, it stops
playing it and begins p laying the first
track of the selected CD.

CD SKIP

AUTOMATIC SEARCH

The Automatic Search feature lets
you quickly locate the beginning of
any track on a CD, including the track
currently playing. You c an us e Auto­matic Search when a CD is playing or
stopped.

If a CD is playing:

∇

∇

•Press
back to the beginning of the cur­rent track.

• Repeatedly press
skip backward to the beginning
of the desired track.

SKIP

once to skip

∇

∇

SKIP

to

RANDOM PLAY

This feature randomly selects and
plays tracks from all loaded CDs.

Note:

To randomly select tracks from
only one or two CDs, you m ust load
only those CDs in the CD tray.

1. Press
function.

2. Press
appears on the display.

STOP

to cancel any CD

RANDOM

.

RANDOM

• Repeatedly press
skip forward to the beginning of
the desired track.

If the CD is stopped, repeatedly

SKIP

press
the display shows the number of the
track you want to play, then press

PLAY/PAUSE

playing the selected track.

20

∇

∇

or

. The CD player starts

SKIP

∇

to

∇

SKIP

∇

until

∇

3. Press
track plays, the system ran­domly selects another track and
plays it and then c ontinues until
all tracks on all loaded CDs are
played.

PLAY/PAUSE

. After one

13-127 5.fm Page 21 Wednesday, J uly 14, 1999 3: 59 PM

Notes:

• To repeat the current track,
press
next random track, press

SKIP

• To repeat random play, before
the last track ends, press

REPEAT

appears on the display.

• To stop random play, press

STOP

DOM

play.

∇

∇

SKIP

. To play the

∇

∇

.

REPEAT ALL

until

then

disappears from the dis-

RANDOM

.

RAN-

REPEAT PLAY

You can repeat a single track on a
selected CD, all tracks on a selected
CD, all tracks on all loaded CDs, or a
programmed sequence.

Note: To cancel repeat play at any
time, repeatedly p ress

REPEAT

play.

disappears from the dis-

REPEAT

until

Repeating All Tracks on a
Selected CD

To repeat all tracks on a selected
CD, press
sired CD. Then repeatedly press

PEAT

appears.

CD SKIP

REPEAT ONE DISC

until

to select the de-

RE-

Repeating All Tracks on All
Loaded CDs

To repeat all tracks on all loaded
CDs, repeatedly press

REPEAT ALL DISC

REPEAT

appears.

until

Repeating a Programmed
Sequence

To repeat a programmed sequence,

REPEAT

press
sequence is playing.
appears, and the CD player continu­ously replays the programmed se­quence.

while the programmed

REPEAT ALL

Repeating a Single Track

To repeat a single track, press

PEAT

once while the desired track is
playing.
the display, and the CD player con­tinuously replays the track.

REPEAT ONE

appears on

RE-

21

13-127 5.fm Page 22 Wednesday, J uly 14, 1999 3: 59 PM

PROGRAMMED PLAY

You can program up to 32 tracks
from any loaded C Ds to play in any
order you choose.

Progra mming and Playing a
Sequence of Tracks

1. Press
function.

2. Press
shows
(the current position in the pro­grammed sequence).

3. Press
containing the tracks you want
to store.

4. Press
to select the CD’s track number
you want to store.

5. Press
stored and the display shows

MEMORY - - - P-02

STOP

to cancel any CD

PROGRAM

. The display

MEMORY - - - P-01

CD SKIP

∇

PROGRAM

to select the CD

∇

SKIP

or

. The track is

SKIP

∇

.

than 32 tracks, the new track
replaces the 32nd track.

7. Press
player plays the tracks in the
programmed order.
the tray number, the current
track number, and the track’s
elapsed time appear on the di s­play.

Notes:

• During play, briefly press or
repeatedly press

SKIP

a previous or a following pro­grammed track.

• You cannot use random pl ay or
display the CD’s remaining time
while a programmed sequence
is stored.

• Pressing
while a programmed sequence
plays.

PLAY/PAUSE

. The CD

MEMORY

∇

∇

SKIP

or

∇

∇

as required, to select

CD SKIP

has no effect

,

Reviewing the Programmed

∇

Sequence

While play is stopped, repeatedly

PROGRAM

press
grammed sequence.

to review the pro-

6. Repeat Steps 3–5 to program
additional tracks.

Note:

FULL

appears on the dis­play after you store the 32nd
track. If you try to program more

22

13-127 5.fm Page 23 Wednesday, J uly 14, 1999 3: 59 PM

Replacing/A dding a Track in
a Programmed Sequence

1. While play is stopped, repeat­edly press
track position number you want
to replace or add to appears on
the display.

PROGRAM

until the

2. Press

CD SKIP

to select the CD

containing the new track.

∇

∇

3. Press

SKIP

or

SKIP

∇

until the desired track appears
on the display.

4. Press

PROGRAM

. The new track
replaces a previous track or is
added to the programmed
sequence.

Clearing the Programmed
Sequence

To clear the entire programmed se­quence, press
stopped, or press

STOP

while play is

OPEN/CLOSE

.

∇

23

13-127 5.fm Page 24 Wednesday, J uly 14, 1999 3: 59 PM

USING THE CASSETTE DECK

The system has two cassette decks.
You can use Deck 1 for normal play­back, consecutive play, and dubbing
(recording). You can use Deck 2 for
normal playback and consecutive
play.

Both decks (1 and 2) have a fu ll-re­lease auto-stop system to protect
tapes and prevent pinch roller dam­age. When a t ape reaches the end
while playing, recording, fast-for­warding, or rewinding, the tape
mechanism automatically stops.

LOADING A CASSETTE
TAPE

Notes:

• Use the control buttons under
the same deck where you
loaded the tape.

3. Load the cassette by placing it in
the tape guides in the cassette
compartment door, with its open
edge down, the desired side fac­ing out, and its full reel to the
left.

4. Gently close the compartment
door.

PLAYING A CASSETTE
TAPE

Warning:

VOLUME

set
fore you begin playing a cassette
tape.

To protect your hearing,

to its lowest setting be-

• Before loading a cassette tape,
take up any slack in the tape by
turning one of the cassette’s
hubs with a pencil. If you do not
remove excess slack, the tape
might become tangled in the
record/playback mechanism.

Follow these steps to load a cassette
tape in either Deck 1 or Deck 2.

1. Press

2. Press

24

TAPE

. The TAPE indicator

lights.

STOP/EJECT

Deck 1 or Deck 2 to open the
cassette compartment door.

on either

Follow these steps to play a cassette
tape in either Deck 1 or Deck 2.

1. Load the cassette.

2. Press

3. Adjust

PLAY

on the deck you are
using. The tape plays until it
reaches the end of the side, then
it automatically stops.

VOLUME

listening level.

to the desired

13-127 5.fm Page 25 Wednesday, J uly 14, 1999 3: 59 PM

4. To fast-forward or rewind the
tape, press

FAST-F

press
deck you are using.

To temporarily stop playback,
press
are using. Press
continue playback.

To stop playback, fast-forward,
or rewind, press
the deck you are using.

5. To open the cassette compart­ment and remove the cassette
tape, press
the cassette player is stopped.

PAUSE

STOP/EJECT

REWIND

or

on the deck you

PAUSE

STOP/EJECT

STOP/EJECT

then

on the

again to

while

on

USING CONSECUTIVE
PLAY

You can set t he tape player to play
one side of a tape in Deck 2, then au­tomatically play one side of a tape in
Deck 1.

1. Load the cassette you want to
hear first in Deck 2 and t he sec­ond cassette in Deck 1.

RECORDING

Notes:

• Be su re the erase-protection tab
for the cassette you want to
record on is i n place (see “Pre­venting Accidental Erasure”).

• The recording level is preset.
Adjusting
equalizer, or
affect the recording level or qual­ity.

E-BASS

Dubbing Cassette Tapes

You can easily copy a tape by play­ing it in Deck 2 and recording it onto
another tape in Deck 1. You can se­lect between normal and high-speed
dubbing, and you can monitor the
tape as you dub it.

1. Load the cassette you want to
copy from into Deck 2 and a
blank cassette, or one y ou want
to record over, into Deck 1.

, the graphic

VOLUME

does not

2. Press

3. While the cassette in Deck 2 is

When the cassette in Deck 2 finishes
playing, the cassette i n Deck 1 a uto­matically begins playback.

PLAY

on Deck 2. The cas-

sette in Deck 2 plays.

playing, press
on Deck 1.

PAUSE

then

PLAY

25

13-127 5.fm Page 26 Wednesday, J uly 14, 1999 3: 59 PM

2. To record at normal speed for
the best quality sound, set

SPEED DUBBING

to

OFF

HIGH

.

To record in half the normal
recording time, set

DUBBING

to ON.

3. On Deck 1, press

RECORD. PLAY

HIGH SPEED

PAUSE

then

on Deck 1 aut o-

matically locks down.

Caution:

RECORD

Do not force down

. This can damage the

recording mechanism.

4. On Deck 2, press

PLAY. PAUSE

on Deck 1 releases and the sys­tem copies the tape in Deck 2
onto the tape in Deck 1.

Notes:

• To monitor the tape while i t is

copying, adjust

VOLUME

to a

comfortable listening level.

• If you monitor the tape while

high-speed dubbing, the
sound is distorted.

5. To stop copying, press

EJECT

on Deck 1 and Deck 2.

STOP/

When the tape in either deck reaches
the end, that deck automatically
turns off. If the cassette in the other
deck has not run out of tape, that
tape continues to record or play. If
you were using high-speed dubbing,
the continuing tape plays/rec ords at
normal speed (instead of high
speed).

Copying a CD to a Cassette
Tape

Follow these steps to copy the tracks
from the loaded CDs to a cassette
tape in Deck 1.

1. On Deck 1:

• Load a blank cassette tape, or
one you want to record over.

PLAY

• Press
play for about 5 seconds so it
plays past the tape leader.

• Press
tape.

• Press

Caution:

RECORD.

recording mechanism.

2. Press

CD

player.

3. Press

OPEN/CLOSE

CD compartment, then load the
desired CDs in the CD player.

and let the tape

STOP/EJECT

PAUSE

then

to stop the

RECORD

Do not force down

This can damage the

to select the CD

to open the

.

26

13-127 5.fm Page 27 Wednesday, J uly 14, 1999 3: 59 PM

Notes:

• To copy a programmed
sequence, store the desired
sequence before continuing
with Step 4.

• To copy a CD’s tracks in ran­dom sequence, press

DOM

so

RANDOM

appears on

RAN-

the display before continuing
with Step 4.

4. Simultaneously press
Deck 1 and

PLAY/PAUSE

PAUSE

on

on the
CD player. The system records
from the CD onto the cassette
tape.

5. To stop recording before it auto­matically stops, press
the CD player, then press

EJECT

on Deck 1.

STOP

STOP/

on

Recordin g from the Tuner or
an External Audio Source

Follow these steps to record from the
tuner or from an external audio
source connected to the system,
such as a VCR or other audio/video
equipment.

1. On Deck 1:

• Load a blank cassette tape, or
one you want to record over.

PLAY

•Press
play for about 5 second s so it
plays past the tape leader.

•Press
tape.

•Press

Caution: Do not force down

RECORD

recording mechanism.

2. Press

TUNER

the desired audio source.

and let the tape

STOP/EJECT

PAUSE

then

to stop the

RECORD

. This can damage the

AUX

or

to select

.

3. Select the desired station or
start the selected a udio source,
then press

PAUSE

on Deck 1.
The cassette records until it
reaches the end of the side, then
it automatically stops.

4. To stop recording before it auto­matically stops, press

EJECT

on Deck 1.

STOP/

27

ON

OFF

13-127 5.fm Page 28 Wednesday, J uly 14, 1999 3: 59 PM

Timer Recording

You can set the s ystem to au tomati­cally turn it self on, recor d from a se­lected audio source (such as the
tuner or a cassette tape in Deck 2)
onto a cassette tape in Deck 1, then
turn itself off at the time you set.

1. Repeat Steps 1-7 in “Using the
Timer,” to set the start and en d
times and select the source you
want to record from.

2. On Deck 1:

• Load a blank cassette tape, or

one you want to record over.

PLAY

•Press

play for about 5 seconds so it
plays past the tape leader.

•Press

tape.

•Press

and let the tape

STOP/EJECT

PAUSE

then

to stop the

RECORD

.

Caution:

If the cassette’s length is
longer than the timer recordi ng peri­od,

RECORD

and

PLAY

stay locked
down when the timer turns off. To
prevent accidental tape tangling,
press

STOP/EJECT

on Deck 1 as
soon as possible after the timer turns
off.

To turn off the timer, press
til

TIM

disappears from the

TIMER

un-

display. If the tape length is longer
than the timer setting, press

EJECT

on Deck 1.

STOP/

Caution:

RECORD

Do not force down

. This can damage the

record mechanism.

TIMER

3. Press

4. Press

to turn on the timer.

PAUSE

on Deck 1. At the
preset time, the system turns
itself on and records onto the
cassette in Deck 1 until the en d
time is reached.

28

g

13-127 5.fm Page 29 Wednesday, J uly 14, 1999 3: 59 PM

MICROPHONE MIXING

Using an external microphone with a

1

/8-inch plug (not supplied), you can
sing along with selections on CDs or
cassette tapes, or with a song played
over the radio.

Warnin

your hearing, set

To prevent damage to

:

VOLUME

to its min­imum level before you turn on the
system.

Your local Radio Shack sells a

Note:

wide selection of microphones.

1. Connect an external microphone

MIC MIX

to the

jack.

3. Select the desired station or
start the selected audio source.

4. Adjust

VOLUME

to a comfortable

listening level.

The microphone input

Note:

jack does not have an in dividual
volume control.

5. Sing or talk into the microp hone.
The system mixes your voice
with the selected audio source.

To record your voice and the audio
source mixed together onto a cas­sette tape, follow the steps in “Copy­ing a CD to a Cassette Tape” or
“Recording from the Tuner or an Ex­ternal Audio Source.”

When you finish mixing, remove the
microphone’s plug from the

MIC MIX

jack.

2. Press

CD, TUNER, TAPE

, or
to select the desired audio
source.

AUX

29

13-127 5.fm Page 30 Wednesday, J uly 14, 1999 3: 59 PM

CARE AND MAINTENANCE

Your Optimus System 728 Mi ni Stereo Compnent System is an examp le of su­perior design and craftsmanship. The following suggestions will help you care for
the system so you can enjoy it for years.

Keep the system dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.

Handle the system gently and carefully. Dropping it can damage
circuit boards and cases and can cause the system to work im­properly.

Use and store the system onl y in normal temperature environ­ments. Temperature extreme s can shorten the life of electronic
devices and distort or melt plastic parts.

Keep the system aw ay f rom dust and dirt, which can cause pre­mature wear of parts.

CLEANER

new. Do not use harsh chemicals, cleaning solvents, or strong de­tergents to clean the system.

Modifying or tampering with the system’s internal components can cause a mal­function and might invalidate y ou r s ystem ’s warranty and void your FCC autho­rization to operate it. If your system is not performing as it should, take it to your
local Radio Shack store for assistance.

30

Wipe the system with a damp cloth occa sionall y to keep it looki ng

g

13-127 5.fm Page 31 Wednesday, J uly 14, 1999 3: 59 PM

CD CARE TIPS

Even though a compact disc is very
durable, treat the CD surface with
care. We recommend the following
precautions:

• Do not write on either side of the
CD, particularly the non-label
side (signals are read from the
non-label side).

• Do not store CDs in high tem­perature, high-humidity loca­tions. They might warp.

• Keep CDs dry. A water drop can
act as a lens and affect the laser
beam’s focus.

• Always handle a CD by the
edges to avoid fingerprints and
always keep it in its protective
case or sleeve w hen it is not in
use. Fingerprints and scratches
on the CD’s surface can prevent
the laser beam from correctly
reading the digital in formation. If
the CD gets scratched, use
Scratch n’ Fix (Radio Shack Cat.
No. 42-127).

TAPE TIPS

Erasing a Cassette Tape

To erase a previously recorded sec­tion of a tape , simply record over it.
To erase the entire cassette tape, let
the tape record to the end with no
source palying.

You can quickly erase both sides of a
cassette tape using a bulk tape eras­er (such as Cat. No. 44-232, not sup­plied), available at your local Radi o
Shack store.

Preventing Accidental
Erasure

Cassette tapes have two erase-pro­tection tabs
protect a recording from being acci­dentally recorded over or erased,
use a screwdriver to remove one or
both of the cassette tape’s erase­protection tabs.

(Needs an illus - show
an erase protection tab
bei
screwdriver.

If you want to record on a tape side
after you have removed the erase­protection tab, place a piece of
strong plastic tape over that side’s
erase-protection hole. Be sure you
cover only the hole originally covered
by the erase-protection tab.

Note:

Removing the erase-protec­tion tabs does not prevent a bulk
eraser from erasing a cassette tape.

one for each side. To

æ

removed with a

31

13-127 5.fm Page 32 Wednesday, J uly 14, 1999 3: 59 PM

Restor in g Tape T e n sio n an d
Sound Quality

After you play a cassette tape sever­al times, the tape might become
tightly wound on the reels. This can
cause playback sound qua lity to de­teriorate.

To restore the sound quality, fast-for­ward the tape from the beginning to
the end of one side, then c omp letely
rewind it. Then loosen the tape re els
by gently tapping each side of the
cassette’s outer shell on a flat sur­face.

Caution:

the cassette when tapping it. Do not
touch the exposed tape or allow any
sharp objects near the cassette.

Be careful not to da mage

Cleaning the Tape Handling
Parts

1. Disconnect power.

2. Open the cassette com partment
doors.

3. Press
expose the tape-handling parts.

4. Use a cotton swab dipped in
denatured alcohol or tape head
cleaning solution to clean the
record/play head, pinch roller,
capstan, and erase head.

PLAY

on both decks to

Dirt, dust or particles of the tape’s
coating can accumulate o n the tape
heads and other parts that the tap e
touches. This can greatly redu ce th e
performance of the cassette player.
Use the following cleaning procedure
after every 20 hours of tape player
operation. Your local Radio Shack
store sells a wide selection of cas­sette cleaning supplies.

32

5. When you f inish cleaning, p ress

STOP/EJECT

close the cassette compartment
doors.

on both deck s and

13-127 5.fm Page 33 Wednesday, J uly 14, 1999 3: 59 PM

SPECIFICATIONS

Cassette

Tape Speed.......................................................................................4.75 cm/sec

Wow and Flutter............................................................................ 0.35% WRMS

Frequency Response .........................................................125 Hz–8 kHz ± 4 dB

Recording System...................................................................................AC Bias

Erase System ....................................................................................... Magnetic

CD Player

Number of Tracks to be Prog r a mmed............... ................. ................ ..32 Tracks

Frequency Response.........................................................40 Hz–16 kHz ± 3 dB

Dynamic Range...........................................................................................85 dB

Signal-to-Noise............................................................................... (JIS-A) 75 dB

Harmonic Distortion (at 1 kHz)..................................................................... 0.5%

Separation (at 1 kHz) ..................................................................................50 dB

Sampling Frequency ..............................................................................44.1 kHz

Quantization Number .................................................................................. 16 Bit

Oversampling..........................................................................................2 Times

Pick-Up System.............................................................................Sanyo SF-91P

Optical Sour ce...... ........................ ................ ........................ .........Sanyo SF-901

Wavelength .............................................................................................790 nm

33

13-127 5.fm Page 34 Wednesday, J uly 14, 1999 3: 59 PM

General

Speaker Impedance.................................................................................8 Ohms

Power Output................................................................ .....10 Watts per Channel

3

Dimensions of Unit......................................14

Dimensions of Each Speaker.......................14

Weight...................................................................................27 lbs 5 oz (12.4 kg

Power Supply...................................................................120V AC, 60 Hz, 48 W

Tuning Range.........................................................................AM: 530–1 710 kHz

Speaker Size...........................................................................................5 Inches

Specifications are typ ical; in dividua l u nits m ight v ary. Spec ificat ions are s ub ject
to change and improvement without notice.

/16 × 117/16 × 145/16 Inches (HWD)

×

(360

288 × 338 mm)

3

/16 × 713/16 × 611/16 Inches (HWD)

×

(360

200 × 175 mm)

FM: 88–108 MHz

34

13-127 5.fm Page 35 Wednesday, J uly 14, 1999 3: 59 PM

NOTES

35

g

g

13-127 5.fm Page 36 Wednesday, J uly 14, 1999 3: 59 PM

RADIO SHACK LIMITED WARRANTY

This product is warranted against defects for 90 days 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 char

slip

not cover transportation costs. Nor does it cover a product subjected to
misuse or accident al dama
EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO
EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES ARE LIM­ITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED
WARRANTIES CONTAINED HEREIN. Some states do not permit limita­tion or exclusion of implied warranties; therefore, the aforesaid limita­tion(s) or exclusion(s) may not apply to the purchaser.

This warranty gives you specifi c legal rights and you may also have o ther r ights which vary
from state to state.

e for parts and labor. Simply

as proof of purchase date to any Radio Shack store. Warranty does

e.

We Service What W e Sell

bring your Radio Shack sales

9/94

RADIO SHACK

A Division of Tandy Corporation

Fort Worth, Texas 76102

7A5 Printed in Hong Kong