Optimus Home Theater System SYSTEM 746 User Manual

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Cat. No. 13-1294  
OWNER’S MANUAL  
Please read before using this equipment.  
System 746  
Micro Stereo Component System  
 
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Auto-Stop — protects the tape and  
tape-handling parts by automatically  
stopping the tape when it finishes  
playing, rewinding, or fast-forwarding.  
Warning: To prevent fire or shock  
hazard, do not expose this prod-  
uct to rain or moisture.  
CAUTION  
Note: The System 746 requires two  
AAA batteries (not supplied) for the re-  
mote control and two AA batteries (not  
supplied) for memory backup.  
RISK OF ELECTRIC SHOCK.  
!
DO NOT OPEN.  
CAUTION: TO REDUCE THE RISK OF  
ELECTRIC SHOCK, DO NOT REMOVE  
COVER OR BACK. NO USER-SERVICE-  
ABLE PARTS INSIDE. REFER SERVIC-  
ING TO QUALIFIED PERSONNEL.  
Important: Most material on compact  
discs and prerecorded tapes is copy-  
righted. 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, how-  
ever, 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.  
This symbol is intended to alert you  
to the presence of uninsulated dan-  
gerous voltage within the product’s  
enclosure that might be of sufficient  
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 in-  
cluded in the literature accompany-  
ing this product.  
!
Compact discs that you  
can play on your sys-  
tem’s CD player have  
this mark on them:  
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 sys-  
tem’s serial number here. The number  
is on the back panel.  
• The use of controls, adjustments,  
or procedures other than those  
specified herein may result in haz-  
ardous radiation exposure.  
Serial Number: ________________  
The graphical symbols with supple-  
mental markings are located on the  
back of the system.  
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FCC INFORMATION  
This system complies with the limits  
for a Class B digital device as speci-  
fied in Part 15 of FCC Rules. These  
limits provide reasonable protection  
against TV or radio interference in a  
residential area. However, your sys-  
tem might cause TV or radio interfer-  
ence 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 ra-  
dio’s receiving antenna.  
• 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.  
4
 
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CONTENTS  
Preparation ........................................................................................................... 7  
Connecting the Speakers ................................................................................ 7  
Connecting the AM Loop Antenna .................................................................. 7  
Connecting the FM Antenna ........................................................................... 7  
Connecting to Power ....................................................................................... 8  
Installing Batteries ........................................................................................... 8  
In the System ............................................................................................ 8  
In the Remote Control .............................................................................. 8  
Using Headphones ......................................................................................... 9  
Listening Safely ........................................................................................ 9  
Basic Operation ................................................................................................. 10  
Using the Remote Control ............................................................................. 11  
Timer Operation ................................................................................................. 12  
Setting the Clock ........................................................................................... 12  
Setting a Wake-Up Time ............................................................................... 12  
Setting the Sleep Timer ................................................................................. 13  
Tuner Operation ................................................................................................. 15  
Automatic Tuning .......................................................................................... 16  
Memory Tuning ............................................................................................. 16  
Storing Stations in Memory Manually ..................................................... 16  
Storing Stations in Memory Automatically .............................................. 16  
Selecting Stations Stored in Memory ..................................................... 16  
CD Player Operation .......................................................................................... 17  
Loading a CD ................................................................................................ 17  
Playing a CD ................................................................................................. 17  
Automatic Skip .............................................................................................. 18  
Audible Search .............................................................................................. 18  
Random Play ................................................................................................ 18  
Repeat Play .................................................................................................. 19  
Intro Play ....................................................................................................... 20  
Programmed Play ......................................................................................... 20  
Programming and Playing a Sequence of Tracks .................................. 20  
Reviewing the Programmed Sequence .................................................. 21  
Erasing the Programmed Sequence ...................................................... 21  
CD Care Tips ................................................................................................ 21  
Cassette Deck Operation .................................................................................. 22  
Loading a Cassette Tape .............................................................................. 22  
Playing a Cassette Tape ............................................................................... 22  
Recording on a Cassette Tape ...................................................................... 23  
5
 
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Recording from the Tuner ....................................................................... 23  
Recording from a CD .............................................................................. 24  
Timer Recording ...................................................................................... 25  
Tape Care Tips .............................................................................................. 25  
Erasing a Cassette Tape ......................................................................... 25  
Preventing Accidental Erasure ................................................................ 25  
Restoring Tape Tension and Sound Quality .................................................. 26  
Care and Maintenance ....................................................................................... 27  
Cleaning the Tape-Handling Parts ................................................................. 28  
Resetting the System .................................................................................... 28  
Specifications ..................................................................................................... 29  
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PREPARATION  
Note: Complete all other connections  
before connecting the system to AC  
power and turning it on.  
CONNECTING THE AM  
LOOP ANTENNA  
Attach the supplied AM loop antenna  
to the AM ANT. terminal on the back of  
the system.  
CONNECTING THE  
SPEAKERS  
+
1. Lift open the red  
and black  
-
illustration  
tabs for the right (R) and left (L)  
speaker terminals on the back of  
the system.  
Attach the antenna stand and set the  
antenna on a flat surface.  
illustration  
illustration  
2. Put the stripped end of the right  
speaker’s striped wire into the R  
+
red  
terminal, then press the tab  
until it clicks back into place.  
CONNECTING THE FM  
ANTENNA  
3. Put the other right speaker’s wire  
into the R black  
terminal, then  
-
press the tab until it clicks back  
into place.  
Press the FM ANTENNA terminal tabs,  
put the stripped end of the supplied  
FM antenna wires into the antenna  
terminals on the back of the system,  
then release the tabs.  
4. Repeat Steps 2 and 3 to connect  
+
the left speaker’s wires to the L  
and terminals.  
-
illustration  
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1. Press in on the battery compart-  
ment cover and push in the direc-  
tion of the arrow, and lift off the  
cover.  
CONNECTING TO  
POWER  
After you complete all connections,  
plug the system’s power cord into a  
standard AC outlet.  
STANDBY  
lights and AM 12:00 appears on the  
display.  
illustration  
Warning: To prevent electric shock,  
the power cord plug’s blades are po-  
larized and fit a polarized AC outlet  
only one way. If you have difficulty in-  
serting the plug, do not force it. Turn it  
over and reinsert it.  
2. Put two AA batteries in the com-  
partment as indicated by the po-  
larity symbols (+ and –) marked  
inside.  
3. Replace the cover.  
INSTALLING BATTERIES  
In the System  
In the Remote Control  
Cautions:  
The remote control requires two AAA  
batteries (not supplied) for power. We  
recommend alkaline batteries, such  
as RadioShack Cat. No. 23-555 for  
the best performance and longest life.  
• Always use fresh batteries of the  
required size and recommended  
type.  
• Never leave dead or weak batter-  
ies in the system or remote con-  
trol. Batteries can leak chemicals  
that can corrode the control.  
1. Press the tab in the direction of  
the arrow and lift off the battery  
compartment cover.  
• Do not mix old and new batteries,  
different types of batteries (stan-  
dard, alkaline, or rechargeable),  
or rechargeable batteries of differ-  
ent capacities.  
illustration  
To retain any preset radio stations  
during an AC power loss, install two  
alkaline AA batteries (such as Cat.  
No. 23-557) into the system’s battery  
compartment.  
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2. Install the batteries as indicated  
by the polarity symbols (+ and -)  
marked inside the compartment.  
• Connecting headphones auto-  
matically disconnects the speak-  
ers.  
• Your local RadioShack store  
sells a wide selection of head-  
phones.  
illustration  
Listening Safely  
To protect your hearing, follow these  
guidelines when you use head-  
phones.  
3. Replace the cover.  
Caution: If you are not going to use  
the remote control for a month or  
more, remove its batteries. Batteries  
can leak damaging chemicals.  
• Do not listen at extremely high  
volume levels. Extended high-  
volume listening can lead to per-  
manent hearing loss.  
You can use the remote control up to  
a distance of about 20 feet from the  
System 746. If the remote control  
operates erratically or does not  
work, replace both batteries.  
• Set the volume to the lowest set-  
ting 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.  
USING HEADPHONES  
You can use headphones (not sup-  
plied) to listen in privacy. Insert the  
headphones’ 1/8-inch plug into the  
jack.  
illustration  
Notes:  
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BASIC OPERATION  
Warning: To protect your hearing,  
adjust VOLUME to the lowest level  
before you turn on the system.  
4. Adjust  
VOLUME  
DOWN/UP  
to a comfortable listening level.  
Follow these steps to operate your  
system.  
illustration  
1. Press POWER /  
STANDBY  
(POWER on the remote control).  
STANDBY turns off, the dis-  
play lights, and the last selected  
system settings appear.  
2. Slide FUNCTION to TAPE, TUN-  
ER, or CD.  
5. Slide E-BASS to ON to empha-  
size bass sounds. To return to  
normal bass sounds, slide it to  
OFF.  
illustration  
illustration  
3. If you selected TAPE or CD, start  
the selected audio source (see  
“Cassette Deck Operation” on  
Page 22 or “CD Player Opera-  
tion” on Page 17).  
If you selected TUNER, select  
the desired station (see “Tuner  
Operation” on Page 15).  
6. To turn off the system, press  
POWER/ STANDBY (POWER on  
the remote control) again.  
STANDBY lights.  
10  
 
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Notes:  
• Make sure you have a clear path  
USING THE REMOTE  
CONTROL  
between the remote control and  
the sensor.  
• Weak batteries or direct sunlight  
on the remote sensor might re-  
duce the remote control’s oper-  
ating range.  
illustration  
The remote control’s buttons have  
the same functions as the corre-  
sponding buttons on the main sys-  
tem.  
To use the remote control, point it to-  
ward the remote sensor on the right  
of the system’s display and press  
the desired buttons.  
illustration  
11  
 
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TIMER OPERATION  
setting the time, start again  
from Step 1.  
SETTING THE CLOCK  
1. With power turned on, press  
CLOCK until the hour and minute  
digits appear.  
To rapidly increase or de-  
crease the hour or minute set-  
ting, hold down  
MIN and  
and  
HOUR (or TUNING  
on the remote control).  
5. Press MEMORY again or wait un-  
illustration  
til the display stops flashing.  
The system always displays the time  
while power is turned off. To display  
the time at any time while power is  
turned on, press CLOCK.  
2. Press MEMORY. The hour and  
minute digits flash.  
illustration  
SETTING A WAKE-UP  
TIME  
3. Within 10 seconds, press  
You can set your system to automat-  
ically turn itself on (like an alarm  
clock) and play the last selected ra-  
dio station, a CD, or a cassette tape.  
HOUR (or TUNING  
on the re-  
mote control) to set the desired  
hour.  
Note: To quickly set the wake-up  
timer using the last selected system  
settings (radio station, volume level,  
and so on; except if the cassette  
deck is selected), you can leave the  
power turned off and skip Steps 5–7  
and 9.  
illustration  
4. Press  
MIN (or TUNING  
the remote control) to set the de-  
sired minute.  
on  
1. Press CLOCK until TIMER ON  
and the last set wake-up time  
appear. Then press MEMORY.  
illustration  
2. Press  
(or TUNING  
MIN and  
HOUR  
on the re-  
and  
Notes:  
mote control) to set the wake-up  
time.  
• If the hour and minute digits  
stop flashing before you finish  
12  
 
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Note: If TIME ON disappears  
before you finish setting the hour  
and minute, start again from  
Step 1.  
Notes:  
• If you selected a cassette  
tape, be sure to release  
PAUSE  
on the deck after you  
CLOCK  
3. Press  
until TIMER OFF  
turn off the system.  
and the last set end time appear.  
To cancel the wake-up timer,  
MIN  
HOUR  
on the re-  
TIMER  
again so TIMER  
disappears.  
4. Press  
TUNING  
and  
press  
(or  
and  
mote control) to set the end  
time.  
SETTING THE SLEEP  
TIMER  
Note: If TIMER OFF disappears  
before you finish setting the hour  
and minute, start again from  
Step 3.  
You can set the system to play up to  
90 minutes, then automatically turn  
off.  
FUNCTION  
CD TUNER  
,
5. Slide  
or  
to  
,
TAPE  
to select the desired au-  
dio source.  
Note: You cannot use the wake-up  
timer while using the sleep timer.  
6. Select the desired radio station,  
or load the CD or cassette tape  
you want the System 746 to play  
when it turns itself on.  
1. With power turned on slide  
FUNCTION  
CD TUNER  
, or  
to  
,
TAPE  
to select the desired audio  
Note: If you selected a cassette  
source.  
PLAY  
tape, be sure to press  
PAUSE  
and  
2. Tune to the desired AM or FM  
radio station, or start the CD or  
tape.  
on the deck.  
E-  
7. Adjust the volume and set  
BASS  
for the desired sound.  
3. To turn on the sleep timer, press  
TIMER  
SLEEP  
on the re-  
8. Press  
to turn on the timer.  
and release  
TIMER appears.  
mote control. You see:  
illustration  
illustration  
POWER/ STANDBY  
9. Press  
to  
turn off the system. The current  
time appears dimly.  
13  
 
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4. To set the sleep timer, repeat-  
edly press SLEEP until the  
desired sleep time appears.  
Each time you press SLEEP, the  
displayed sleep time decreases  
in 10-minute steps.  
The system turns off after the  
amount of time you set. To turn off  
the sleep timer sooner, repeatedly  
press SLEEP until SLEEP disap-  
pears.  
14  
 
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TUNER OPERATION  
1. Slide FUNCTION to TUNER. The  
system automatically tunes to  
the station that was playing  
when the system was turned off  
or when it was last set to TUNER.  
You can also use automatic tun-  
ing (see “Automatic Tuning” on  
Page 16) or memory tuning (see  
“Storing Stations in Memory  
Manually” on Page 16).  
2. Repeatedly press BAND to se-  
lect the AM or FM band. The last  
selected station in that band ap-  
pears.  
Notes:  
STEREO appears when the  
tuner receives a broadcast in  
stereo.  
To improve reception for weak  
FM stereo stations, set ST./  
MONO on the back of the sys-  
tem to MONO so STEREO dis-  
appears. The sound is no  
longer in stereo, but reception  
should improve.  
illustration  
Notes:  
• For the best AM reception, ro-  
tate the loop antenna.  
• For the best FM reception,  
fully extend the FM antenna.  
illustration  
3. Press TUNING  
TUNING  
and  
or  
(or  
on the remote  
control) to tune to the next high-  
est or lowest station. The fre-  
quency changes on the display.  
illustration  
4. Adjust the volume and set E-  
BASS for the desired sound.  
15  
 
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MEMORY  
3. Press  
again to store  
AUTOMATIC TUNING  
the station in the memory loca-  
tion.  
You can use automatic tuning to  
quickly move up or down to the next  
available station in your area.  
Note: If MEMORY disappears be-  
fore you store the station, start  
again from Step 1.  
TUNING  
Hold down  
or  
(or  
TUNING  
and on the remote con-  
trol) for about 1 second. The tuner  
automatically moves up or down the  
band and stops when it finds the  
next active station.  
Storing Stations in Memory  
Automatically  
To have the system automatically  
store the first 30 active FM and AM  
MEM-  
frequencies it finds, hold down  
ORY  
for about 3 seconds. MEMORY  
MEMORY TUNING  
and each memory location number  
flash. The system tunes FM frequen-  
cies first, then AM. When storing is  
complete, all display indicators stop  
flashing and the system automatical-  
ly tunes to the frequency stored in  
memory location 01.  
You can store up to 30 radio stations  
in memory.  
Note: You can assign one frequency  
to each memory location. When you  
assign another frequency to the  
same memory location, the new fre-  
quency replaces the old one.  
Selecting Stations Stored in  
Memory  
Storing Stations in Memory  
Manually  
To recall a preset station, press  
PRESET DOWN  
UP  
or  
until the  
1. After tuning to the station you  
desired frequency appears.  
MEMORY  
want to store, press  
.
MEMORY appears and PRO-  
GRAM flashes.  
2. While PROGRAM flashes, press  
PRESET DOWN  
UP  
or  
to se-  
lect a memory location number.  
illustration  
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CD PLAYER OPERATION  
LOADING A CD  
PLAYING A CD  
1. Slide FUNCTION to CD. CD ap-  
To play a CD, simply press PLAY/  
pears.  
PAUSE  
after you load it. The CD  
01  
begins to play from Track 1.  
2. Press OPEN to open the CD com-  
then the elapsed play time appears.  
partment. OPEN appears.  
illustration  
illustration  
Notes:  
To temporarily stop play, press  
y
PLAY/PAUSE  
.
appears and  
the elapsed timer stops counting.  
To resume play, press PLAY/  
3. Carefully place a CD over the cen-  
ter hub, label side up.  
PAUSE  
again.  
• During playback, if the changer is  
subjected to a sudden shock or  
jolt, the speed of rotation might  
change, or some noise might be  
produced. This is not a malfunc-  
tion.  
illustration  
The system automatically stops play  
at the end of the CD’s last track.  
4. After you load the CD, press the  
right corner of the door down until  
it clicks shut. The system displays  
the number of tracks and the CD’s  
total playing time.  
To stop the CD player at any time dur-  
ing play, press STOP . The CD’s total  
number of tracks and playing time ap-  
pear.  
illustration  
17  
 
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AUTOMATIC SKIP  
AUDIBLE SEARCH  
SKIP  
The automatic skip feature lets you  
quickly locate the beginning of any  
track on a CD, including the track  
currently playing. You can use auto-  
matic skip when a CD is playing or  
stopped.  
Hold down  
or  
on the  
CD player to search forward or back-  
ward during play. The CD plays rap-  
idly, and you hear it at a high speed  
and low volume.  
RANDOM PLAY  
illustration  
This feature randomly selects and  
plays all the tracks from the loaded  
CD.  
If a CD is playing:  
SKIP  
• Press  
once to skip  
STOP  
1. Press  
to cancel any CD  
back to the beginning of the cur-  
rent track.  
function.  
RANDOM  
2. Press  
pears.  
. RANDOM ap-  
SKIP  
• Repeatedly press  
to  
skip backward to the beginning  
of the desired track.  
SKIP  
• Repeatedly press  
to  
illustration  
skip forward to the beginning of  
the desired track.  
The first randomly selected track  
number appears, then the track  
begins to play and its elapsed  
play time appears.  
If the CD is stopped or paused, re-  
SKIP  
peatedly press  
or  
until  
the system displays the number of  
the track you want to play, then  
The system plays all tracks in  
random order, then stops auto-  
matically.  
PLAY/PAUSE  
press  
. The CD  
player starts playing the selected  
track.  
Notes:  
To replay the current track,  
SKIP  
press  
.
To play the next random track,  
SKIP  
press  
.
18  
 
13-1294.fm Page 19 Wednesday, July 14, 1999 7:01 PM  
To repeat the current track,  
REPEAT PLAY  
REPEAT  
press  
once while the  
desired track is playing. RE-  
PEAT appears, and the CD  
player continuously replays the  
track.  
You can repeat a single track, all  
tracks on a CD, or an entire pro-  
grammed sequence (see “Pro-  
grammed Play” on Page 20).  
To repeat random play, before  
RE-  
the last track ends, press  
PEAT  
illustration  
until REPEAT ALL ap-  
pears.  
RE-  
To repeat a single track, press  
PEAT  
To briefly stop random play,  
PLAY/PAUSE  
ap-  
once while the desired track is  
y
press  
.
playing. REPEAT appears, and the  
CD player continuously replays the  
track.  
pears. To resume play, press it  
again.  
3. To stop the CD player at any time  
STOP  
during random play, press  
.
To repeat all tracks on the CD, press  
RANDOM disappears and the CD’s  
total number of tracks and playing  
time appear.  
REPEAT  
steadily on the display.  
until REPEAT ALL appears  
To continuously repeat  
grammed sequence, first program  
the tracks you want to play, then press  
a
pro-  
To cancel random play and re-  
sume normal play without stop-  
RANDOM  
ping play, simply press  
.
REPEAT  
until REPEAT ALL appears  
RANDOM disappears and the CD  
player resumes normal play.  
along with PROGRAM.  
To cancel repeat play during or af-  
REPEAT  
ter play, press  
until REPEAT  
disappears. If repeat is cancelled dur-  
ing play, the CD player resumes nor-  
mal play.  
19  
 
13-1294.fm Page 20 Wednesday, July 14, 1999 7:01 PM  
PROGRAM/MEMORY  
2. Press  
(or  
INTRO PLAY  
PROG  
on the remote control).  
The INTRO function lets you play  
the first 10 seconds of each track so  
you can quickly find the one you  
want.  
illustration  
INTRO  
To use INTRO, press  
on the  
SKIP  
3. Press  
or  
to select  
remote control. The CD player be-  
gins playing.  
the desired track.  
PROGRAM/MEMORY  
4. Press  
PROG  
(or  
on the remote control) to  
store the selected track. P-02  
appears.  
illustration  
5. Repeat Steps 3 and 4 to pro-  
gram additional tracks.  
Note: You cannot store more  
than 32 tracks. If you try to store  
any track after the 32nd track, it  
replaces the first track and  
FULL appears.  
You can use random play, repeat  
play, and skip during intro play.  
PLAY/PAUSE  
6. Press  
to play  
the programmed tracks.  
To cancel intro play during or after  
INTRO  
play, press  
. If intro is can-  
Notes:  
celled during play, the CD player be-  
gins normal play.  
• You cannot use random play  
while programmed se-  
a
quence is stored.  
PROGRAMMED PLAY  
• You can repeat (all), skip over,  
or search through pro-  
grammed tracks.  
You can program up to 32 tracks in  
any order you choose.  
To briefly stop programmed  
PLAY/PAUSE  
play, press  
.
y
appears. To resume play,  
Programming and Playing a  
Sequence of Tracks  
press it again.  
E-  
7. Adjust the volume and set  
STOP  
1. Press  
until the system  
BASS  
for the desired sound.  
displays the total number of  
tracks and the total playing time.  
20  
 
13-1294.fm Page 21 Wednesday, July 14, 1999 7:01 PM  
8. Programmed play automatically  
stops at the end of the last pro-  
grammed track. To stop the CD  
player at any time during pro-  
grammed play, press STOP . The  
CD’s total number of tracks and  
playing time appear.  
CD CARE TIPS  
Even though a compact disc is very  
durable, treat the CD surface with  
care. We recommend the following  
precautions:  
• Do not place anything but a CD in  
the disc tray. This can damage the  
drive mechanism.  
To replace a programmed track,  
Note:  
press PROGRAM/MEMORY (or PROG  
on the remote control) until the posi-  
tion number of the track you want to  
replace appears. Then repeat Steps 3  
and 4 to select and store the new  
track.  
• Do not write on either side of the  
CD, particularly the non-label side  
(signals are read from the non-la-  
bel side).  
• Do not store CDs in high-  
temperature, high-humidity loca-  
tions. The CDs might warp.  
Reviewing the Programmed  
Sequence  
• Keep CDs dry. A water drop can  
act as a lens and affect the laser  
beam’s focus.  
While play is stopped, repeatedly  
press PROGRAM/MEMORY (or PROG  
on the remote control) to review the  
programmed sequence.  
• Always handle a CD by the edges  
to avoid fingerprints and always  
keep it in its protective case or  
sleeve when not in use. Finger-  
prints and scratches on the CD’s  
surface can prevent the laser  
beam from correctly reading the  
digital information. To clean the  
CD surface, use a CD cleaner kit  
(such as Cat. No. 42-225). If the  
CD gets scratched, use Scratch ’n  
Fix (RadioShack Cat. No. 42-  
127).  
Erasing the Programmed  
Sequence  
You can do either of the following to  
erase a programmed sequence:  
• Press PROGRAM/MEMORY (or  
PROG on the remote control) then  
STOP  
before or after pro-  
grammed play.  
• Press OPEN before or after pro-  
grammed play.  
21  
 
13-1294.fm Page 22 Wednesday, July 14, 1999 7:01 PM  
CASSETTE DECK OPERATION  
The system has one cassette deck  
for cassette tape playback and re-  
cording. The deck has a full-release  
auto-stop system to protect tapes  
and prevent pinch roller damage.  
When a tape reaches the end of a  
side, the tape mechanism automati-  
cally stops and releases the tape.  
3. Insert the cassette tape into the  
tape guides in the compartment  
door, with its exposed tape edge  
facing down, the side you want  
play facing you, and its full reel  
to the left.  
4. Close the compartment door.  
PLAYING A CASSETTE  
TAPE  
LOADING A CASSETTE  
TAPE  
After loading a cassette tape, follow  
these steps to play it.  
1. Take up any slack in the tape by  
turning the cassette’s hub with a  
pencil. If you do not remove ex-  
cess slack, the tape might be-  
come tangled in the record/  
playback mechanism. Avoid  
touching the tape.  
1. Slide FUNCTION to TAPE. TAPE  
appears.  
2. Press  
(Play). The tape plays  
until it reaches the end of the  
side, then it automatically stops.  
illustration  
illustration  
Notes:  
2. Press  
(Stop/Eject) to open  
To temporarily stop playback,  
the cassette compartment door.  
press  
(Pause). Press  
again to continue playback.  
illustration  
illustration  
22  
 
13-1294.fm Page 23 Wednesday, July 14, 1999 7:01 PM  
To rewind or fast-forward the  
Notes:  
• Be sure the cassette’s erase-  
tape, press  
(Rewind) or  
ward).  
then press  
(Fast For-  
protection tabs are in place (see  
“Preventing Accidental Erasure”  
on Page 25).  
• Before you load a cassette tape  
for recording, turn the cassette’s  
hub with your finger or a pencil  
to move the tape past its leader.  
illustration  
To stop fast-forward or re-  
wind, press  
.
• The recording level is preset. E-  
BASS and VOLUME have no ef-  
fect on the recording level or  
quality.  
illustration  
Tape quality greatly affects the  
quality of the recording. We rec-  
ommend regular length (60- or  
90-minute) cassette tapes. For  
low-noise, wide-range record-  
ings, use normal-bias tape.  
3. Adjust the volume and set E-  
BASS for the desired sound.  
4. To stop play before the tape side  
reaches the end, press  
.
Press while the cassette  
player is stopped to open the  
cassette compartment and re-  
move the tape.  
Recording from the Tuner  
1. Load a blank cassette tape, or  
one you want to record over, into  
the cassette deck with the full  
reel to the left and the side you  
want to record on facing you.  
RECORDING ON A  
CASSETTE TAPE  
2. Press then (Record).  
and lock down.  
,
,
You can record from the CD player  
or radio to a cassette tape.  
If you use a cassette tape  
Caution:  
illustration  
with the erase-protection tabs re-  
moved, do not force down . This  
can damage the recording mecha-  
nism. See “Preventing Accidental  
Erasure” on Page 25.  
3. Slide FUNCTION to TUNER.  
23  
 
13-1294.fm Page 24 Wednesday, July 14, 1999 7:01 PM  
4. Select the desired band and sta-  
tion, then press to release it and  
start recording. The cassette  
records until it reaches the end of  
the side, then the cassette deck  
automatically stops.  
Recording from a CD  
1. Load a blank cassette tape, or  
one you want to record over.  
2. Press  
and  
then  
lock down.  
(Record).  
,
,
Notes:  
FUNCTION  
CD  
.
3. Slide  
to  
To temporarily stop recording,  
4. Load the desired CD in the CD  
player.  
press . Press  
sume recording.  
again to re-  
5. Select the desired CD track or  
program a sequence (if you do not  
want to record the entire CD in or-  
der).  
• If you record broadcasts from  
AM radio, you might hear a low-  
volume hum when you play  
back the recording. If this oc-  
BEAT  
curs, set  
on the back of  
Note: To copy a CD’s tracks in  
RAN-  
random sequence, press  
the system to the other position  
and try again.  
DOM  
so RANDOM appears.  
6. Press both  
PLAY/PAUSE  
player.  
on the deck and  
y
on the CD  
illustration  
Beat switch  
location  
Notes:  
To briefly stop the tape while re-  
cording, press . To resume re-  
cording, press again.  
• To listen to the CD during re-  
cording, adjust the volume and  
E-BASS  
for the desired sound.  
7. Recording stops automatically  
when the tape reaches its end. To  
stop the tape at any time during  
recording, press  
.
Note: To stop the CD at any time  
STOP  
. The  
during recording, press  
5. To stop recording before it auto-  
CD’s number of tracks and total  
play time appear.  
matically stops, press  
deck.  
on the  
24  
 
13-1294.fm Page 25 Wednesday, July 14, 1999 7:01 PM  
Timer Recording  
TAPE CARE TIPS  
You can set the system to automati-  
cally turn on, record from a selected  
audio source onto a cassette tape,  
then turn off at the time you set.  
Erasing a Cassette Tape  
To erase a previously recorded sec-  
tion of a tape, simply record over it. To  
erase the entire cassette tape, let the  
tape record to the end with no source  
playing.  
1. Follow Steps 1–5 in “Setting a  
Wake-Up Time” on Page 12 to set  
the start and end times and select  
the source you want to record  
from.  
You can quickly erase both sides of a  
cassette tape using a bulk tape eraser  
(such as Cat. No. 44-232, not sup-  
plied).  
2. Load a blank cassette tape, or  
one you want to record over.  
3. Press then (Record).  
4. Press TIMER to turn on the timer.  
Preventing Accidental  
Erasure  
Cassette tapes have two erase-pro-  
tection tabs — one for each side. To  
protect a recording from being acci-  
dentally recorded over or erased, use  
a screwdriver to remove one or both of  
the cassette tape’s erase-protection  
tabs.  
illustration  
5. Release . At the preset start  
time, the system turns on and  
records onto the cassette until the  
end time.  
Caution: If the cassette tape’s  
length is longer than the timer re-  
(Needs an illus - show  
an erase protection tab  
being removed with a  
screwdriver.  
cording period,  
and  
stay  
locked down when the timer turns  
off. To prevent accidental tape  
tangling, press  
as soon as  
possible after the timer turns off.  
To turn off the timer before it automat-  
ically turns off, press TIMER until  
TIMER disappears.  
25  
 
13-1294.fm Page 26 Wednesday, July 14, 1999 7:01 PM  
If you want to record on a tape side af-  
ter you have removed the erase-  
protection 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.  
RESTORING TAPE  
TENSION AND SOUND  
QUALITY  
After you play a cassette tape several  
times, the tape might become tightly  
wound on the reels. This can cause  
playback sound quality to deteriorate.  
To restore the sound quality, fast-  
forward the tape from the beginning to  
the end of one side, then completely  
rewind it. Then loosen the tape reels  
by gently tapping each side of the cas-  
sette’s outer shell on a flat surface.  
illustration  
Note: Removing the erase-protection  
tabs does not prevent a bulk eraser  
from erasing a cassette tape.  
Caution: Be careful not to damage  
the cassette when tapping it. Do not  
touch the exposed tape or allow any  
sharp objects near the cassette.  
26  
 
13-1294.fm Page 27 Wednesday, July 14, 1999 7:01 PM  
CARE AND MAINTENANCE  
Your Optimus System 746 Micro Stereo Component System is an example of su-  
perior 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 cir-  
cuit boards and cases and can cause the system to work improperly.  
Use only fresh batteries of the required size and type. Batteries can  
leak chemicals that damage your system’s electronic parts.  
Use and store the system only in normal temperature environments.  
Temperature extremes can shorten the life of electronic devices,  
damage batteries, and distort or melt plastic parts.  
Keep the system away from dust and dirt, which can cause prema-  
ture wear of parts.  
Wipe the system with a damp cloth occasionally to keep it looking  
new. Do not use harsh chemicals, cleaning solvents, or strong deter-  
gents to clean the system.  
Modifying or tampering with the system’s internal components can cause a mal-  
function and might invalidate your system’s warranty and void your FCC authoriza-  
tion to operate it. If your system is not performing as it should, take it to your local  
RadioShack store for assistance.  
27  
 
13-1294.fm Page 28 Wednesday, July 14, 1999 7:01 PM  
5. When you finish cleaning, press  
to release the play mecha-  
nism, then close the cassette  
compartment door and reconnect  
power.  
CLEANING THE TAPE-  
HANDLING PARTS  
Dirt, dust or particles of the tape’s  
coating can accumulate on the tape  
heads and other parts that the tape  
touches. This can greatly reduce the  
cassette player’s performance. To  
prevent noise and poor high-  
frequency response, clean the cas-  
sette player’s tape-handling parts after  
every 20 hours of use. Your local Ra-  
dioShack store sells a wide selection  
of cassette deck cleaning supplies.  
RESETTING THE  
SYSTEM  
If the System 746 is not working prop-  
erly, reset it to delete all programmed  
play sequences, memory tuning set-  
tings, timer sequences, and the time.  
1. Turn off the system, then unplug  
its power cord.  
To reset the system, insert a pointed  
object (such as a straightened paper  
RESET  
clip) into the hole on the back  
of the system.  
2. Press  
. The cassette com-  
partment door opens.  
3. Press  
on the deck to expose  
the tape-handling parts.  
4. Use a cotton swab dipped in de-  
natured alcohol or tape head  
cleaning solution to gently clean  
the record/playback head, pinch  
roller, capstan, tape guides, and  
erase head.  
illustration  
Pinch Roller  
Record/Playback  
Head  
Erase Head  
Tape  
Guides  
Capstan  
28  
 
13-1294.fm Page 29 Wednesday, July 14, 1999 7:01 PM  
SPECIFICATIONS  
Cassette  
Tape Speed .................................................................................................. 17/8 ips  
Wow and Flutter ................................................................................ 0.35% WRMS  
Frequency Response ......................................................... 125 Hz–6.3 kHz ± 6 dB  
Recording System ...................................................................................... AC Bias  
Erase System ............................................................................................ Magnetic  
CD Player  
Number of Tracks to be Programmed ..................................................... 32 Tracks  
Frequency Response (at –3 dB) ...................................................... 100 Hz–20 kHz  
Dynamic Range .............................................................................................. 80 dB  
Signal-to-Noise ................................................................................... (JIS-A) 60 dB  
Harmonic Distortion (at 1 kHz) ......................................................................... 0.5%  
Separation (at 1 kHz) ...................................................................................... 40 dB  
Sampling Frequency .................................................................................. 44.1 kHz  
Quantization Number ........................................................................................ 8-Bit  
Oversampling ........................................................................................... 16 Times  
Pick-Up System ........................................................................................... 3 Beam  
Optical Source ....................................................................... Semiconductor Laser  
Wavelength .................................................................................................. 790 nm  
General  
Power Output .......................................................................... 5 Watts per Channel  
Power Supply ............................................................................................ 120V AC  
Tuning Range ............................................................................ AM: 530–1710 kHz  
FM: 88–108 MHz  
Speaker Dimensions (HWD) ............................................ 97/16 × 51/8 × 613/16 Inches  
(240 × 130 × 173 mm)  
Speaker Size .............................................................................................. 4 Inches  
Speaker Impedance .................................................................................... 4 Ohms  
System Dimensions (HWD) ............................................ 97/16 × 511/16 × 91/16 Inches  
(240 × 145 × 230 mm)  
Weight ............................................................................................................. 13 lb  
(5.9 kg)  
Specifications are typical; individual units might vary. Specifications are subject to  
change and improvement without notice.  
29  
 
13-1294.fm Page 30 Wednesday, July 14, 1999 7:01 PM  
NOTES  
30  
 
13-1294.fm Page 31 Wednesday, July 14, 1999 7:01 PM  
31  
 
13-1294.fm Page 32 Wednesday, July 14, 1999 7:01 PM  
Limited Ninety-Day Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-  
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED  
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,  
INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,  
ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES  
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABIL-  
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-  
SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE  
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-  
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-  
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,  
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-  
VISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-  
cidental or consequential damages, so the above limitations or exclusions may not apply to you.  
In the event of a product defect during the warranty period, take the product and the RadioShack  
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-  
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and  
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase  
price. All replaced parts and products, and products on which a refund is made, become the prop-  
erty of RadioShack. New or reconditioned parts and products may be used in the performance of  
warranty service. Repaired or replaced parts and products are warranted for the remainder of the  
original warranty period. You will be charged for repair or replacement of the product made after the  
expiration of the warranty period.  
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,  
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or  
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs  
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as  
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs  
of product removal, installation, set-up service adjustment or reinstallation.  
This warranty gives you specific legal rights, and you may also have other rights which vary from  
state to state.  
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102  
We Service What We Sell  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
7A7  
Printed in Hong Kong  
 

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