Optimus Portable CD Player CD 3680 42 5075 User Manual

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Cat. No. 42-5075/42-5076  
OWNER’S MANUAL  
Please read before using this equipment.  
Portable Compact Disc Player  
with Digital Anti-Shock  
CD-3680 (42-5075)  
CD-3690 (42-5076)  
 
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Resume — lets you easily resume lis-  
tening to the track that was selected  
when you stopped playing a CD.  
Important: You need a pair of stereo  
headphones, earphones, or amplified  
speakers, or a home audio or auto-  
sound system to use your CD player.  
Your local RadioShack store carries a  
complete line of headphones, ear-  
phones, speakers, and audio sys-  
tems.  
Three Power Sources — let you  
power your CD player from two stan-  
dard or rechargeable nickel-cadmium  
AA batteries, your vehicle’s battery us-  
ing the supplied DC adapter, or stan-  
dard AC power using an optional AC  
adapter.  
CDs that can be played on this CD  
player have this mark on them:  
Power/Charging Jack — lets you  
charge  
nickel-cadmium batteries  
without removing them from the CD  
player.  
The CD player’s advanced technology  
makes it simple to operate. But, be  
sure you read this Owner’s Manual  
completely so you can take advantage  
of all its advanced features.  
Lighted Buttons and Display —  
when you operate the CD player with  
an AC or DC adapter, the buttons and  
display light up for easy viewing in the  
dark.  
Supplied CD-to-Cassette Adapter  
— lets you connect the CD player di-  
rectly to a cassette player in your  
home or vehicle.  
We recommend you record your CD  
player’s serial number here. The num-  
ber is inside the CD player’s battery  
compartment.  
Line Out Jack and Supplied Y-  
Cable — makes it easy to connect the  
CD player to your sound system’s low-  
level inputs.  
Serial Number __________________  
5- or 3-Inch CD Compatible  
Carrying Pouch (Supplied with 42-  
5076 only)  
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This CD player is made and tested to  
meet exacting safety standards. It  
meets FCC requirements and com-  
plies with safety performance stan-  
dards of the U.S. Department of  
Health and Human Services.  
FCC INFORMATION  
This equipment complies with the lim-  
its for a Class B digital device as spec-  
ified in Part 15 of FCC Rules. These  
limits provide reasonable protection  
against radio and TV interference in a  
residential area. However, your CD  
player might cause TV or radio inter-  
ference even when it is operating  
properly. To eliminate interference,  
you can try one or more of the follow-  
ing corrective measures:  
Warnings:  
• This CD player employs a laser  
light beam. Only a qualified ser-  
vice person should remove the  
cover or attempt to service this  
device, due to possible eye injury.  
• Increase the distance between the  
CD player and the radio or TV.  
• The use of controls, adjustments,  
or procedures other than those  
specified herein might result in  
hazardous radiation exposure.  
• Use outlets on different electrical  
circuits for the CD player and the  
radio or TV.  
Consult your local RadioShack store if  
the problem still exists.  
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CONTENTS  
Powering the CD Player ...................................................................................... 6  
Using Batteries ................................................................................................ 6  
Recharging Nickel-Cadmium Batteries ..................................................... 7  
Using Vehicle Battery Power ........................................................................... 8  
Using AC Power .............................................................................................. 8  
Connections ....................................................................................................... 10  
Connecting Earphones/Headphones ............................................................ 10  
Listening Safely ...................................................................................... 10  
Traffic Safety ........................................................................................... 10  
Connecting Amplified Speakers .................................................................... 11  
Connecting to a Home Audio System ........................................................... 11  
Connecting to an Autosound System ............................................................ 11  
Operation ............................................................................................................ 13  
Loading a CD ................................................................................................ 13  
Playing a CD ................................................................................................. 13  
2
Digital Anti-Shock System (DAS ) ................................................................ 14  
Automatic Search Music System (ASMS) ..................................................... 14  
Locking the Controls ..................................................................................... 15  
Viewing the Elapsed Time ............................................................................. 15  
Turning E-Bass On and Off ........................................................................... 15  
Audible Search .............................................................................................. 16  
Pause/Cue .................................................................................................... 16  
Intro Scan ...................................................................................................... 16  
Repeat Play .................................................................................................. 16  
Random Play ................................................................................................ 17  
Programmed Play ......................................................................................... 17  
Resume ......................................................................................................... 18  
Troubleshooting ................................................................................................ 19  
Care and Maintenance ...................................................................................... 20  
Replacing the DC Adapter’s Fuse ................................................................. 21  
CD Care Tips ................................................................................................ 21  
Specifications .................................................................................................... 22  
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POWERING THE CD PLAYER  
You can power your CD player from  
any of these sources:  
• Two AA alkaline batteries (not  
supplied)  
• Two rechargeable AA nickel-  
cadmium batteries (not supplied)  
• Vehicle battery power using the  
supplied DC adapter  
1. Press down on the battery com-  
• Standard AC power using an AC  
adapter (not supplied)  
partment cover and slide it in the  
direction of the arrow on the  
cover, then lift the cover.  
Note: Connecting an AC or DC adapt-  
er to the CD player with non-recharge-  
able batteries installed disconnects  
the batteries.  
Caution: The battery compart-  
ment cover is attached to the CD  
player. Do not try to remove it.  
2. Put two AA alkaline batteries or  
two AA nickel-cadmium batteries  
in the battery compartment, as  
indicated by the polarity symbols  
(+ and –) marked inside.  
USING BATTERIES  
You can power your CD player from  
two AA alkaline batteries (such as Ra-  
dioShack Cat. No. 23-552) or two re-  
chargeable AA nickel-cadmium bat-  
teries (such as Cat. No. 23-125).  
Note: Before you use the CD  
player with nickel-cadmium batter-  
ies, you need to charge them,  
either in an external battery  
charger (such as Cat. No. 23-134)  
or in the CD player (see “Recharg-  
ing Nickel-Cadmium Batteries” on  
Page 7).  
Cautions:  
• Always use fresh, or freshly  
charged, batteries of the required  
size and type.  
3. Close the battery compartment  
cover.  
• Do not mix old and new batteries,  
different types of batteries (stan-  
dard, alkaline, or rechargeable  
nickel-cadmium), or recharge-  
able batteries of different capaci-  
ties.  
If  
flashes on the display, the  
sound distorts, or the volume weak-  
ens, replace or recharge the batteries.  
Follow these steps to install the batter-  
ies.  
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Cautions:  
Follow these steps to charge nickel-  
cadmium batteries in the CD player.  
• If you will not be using the CD  
player with battery power for sev-  
eral months, remove the batteries.  
1. Connect an AC adapter or the  
supplied DC adapter to your CD  
player (see “Using AC Power” on  
Page 8 or “Using Vehicle Battery  
Power” on Page 8).  
• Dispose of old batteries promptly  
and properly.  
2. With rechargeable batteries in-  
stalled and the CD compartment  
Recharging Nickel-Cadmium  
Batteries  
STOP/CLEAR  
cover closed, press  
.
CHG flashes on the display. Then  
CHG CHG CHG appears and the  
CD player starts to recharge the  
batteries.  
If you connect the supplied DC adapt-  
er (see “Using Vehicle Battery Power”  
on Page 8) or an AC adapter (see  
“Using AC Power” on Page 8) to the  
CD player, you can set the CD play-  
er to charge nickel-cadmium batter-  
ies while they are inside the CD  
player’s battery compartment.  
Cautions:  
It takes about 3 hours to charge  
new or fully discharged nickel-  
cadmium batteries. Subsequent  
charges take 2–3 hours.  
• Use only the supplied DC adapter  
or an AC adapter that meets the  
specifications in “Using AC Power”  
on Page 8 to recharge the batteries  
in the CD player. Other adapters  
could damage your CD player or  
the batteries.  
3. When the batteries are fully  
charged, the CD player automati-  
cally stops charging them and  
turns itself off. Disconnect the AC  
or DC adapter.  
• Do not use the CD player or open  
the CD compartment cover while  
you are charging nickel-cadmium  
batteries.  
• Nickel-cadmium batteries charge  
more efficiently if the temperature  
is above 40°F (4.5°C) and below  
90°F (32°C).  
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Important: Your CD player is capable  
of using nickel-cadmium batteries. At  
the end of the batteries’ useful life,  
they must be recycled or disposed of  
properly. Contact your local, county,  
or state hazardous waste manage-  
ment authorities for information on re-  
cycling or disposal programs in your  
area. Some options that might be  
available are: municipal curbside col-  
lection, drop-off boxes at retailers  
such as your local RadioShack store,  
recycling collection centers, and mail-  
back programs.  
Follow these steps to connect the  
cigarette-lighter socket to the CD play-  
er.  
1. Insert the DC adapter’s barrel  
DC IN 6V  
plug into the CD player’s  
jack.  
2. Make sure the DC adapter’s tip is  
securely attached, then plug the  
DC adapter’s other end into your  
vehicle’s cigarette-lighter socket.  
USING VEHICLE  
BATTERY POWER  
Note: If the CD player does not  
operate when you use the DC  
adapter, unplug the cord from the  
cigarette-lighter socket and clean  
any ashes or debris from the  
socket.  
You can power your CD player from  
your vehicle’s cigarette-lighter socket  
with the supplied DC adapter.  
Cautions:  
• The supplied DC adapter supplies  
6 volts and delivers at least 500  
milliamps. Its center tip is set to  
positive, and its plug correctly fits  
USING AC POWER  
DC IN 6V  
the CD player’s  
jack.  
You can power the CD player from a  
standard AC outlet using an optional  
AC adapter such as Cat. No. 273-  
1664.  
Using a DC adapter that does not  
meet these specifications could  
damage the CD player or the DC  
adapter.  
Cautions:  
• When you finish using the CD  
player, always unplug the DC  
adapter from the cigarette-lighter  
socket before you disconnect it  
from your CD player.  
• You must use an AC adapter that  
supplies 6 volts and delivers at  
least 500 milliamps. Its center tip  
must be set to positive, and its  
plug must correctly fit the CD  
DC IN 6V  
player’s  
jack. The recom-  
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mended adapter meets these  
specifications. Using an adapter  
that does not meet these specifi-  
cations could damage the CD  
player or the adapter.  
• When you finish using the AC  
adapter, unplug it from the AC out-  
let first, then disconnect it from the  
CD player.  
Follow these steps to connect the CD  
player to AC power.  
1. Insert the AC adapter’s 4.0 mm  
outer diameter/1.7 mm inner  
diameter barrel plug into the  
adapter’s cord, setting TIP to +  
(positive).  
2. Set the AC adapter’s voltage  
switch to 6V.  
3. Insert the AC adapter’s barrel plug  
into the CD player’s DC IN 6V jack.  
4. Plug the other end of the adapter  
into a standard AC outlet.  
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CONNECTIONS  
You can listen to your CD player by  
connecting earphones/headphones or  
amplified speakers to the player’s  
PHONES jack, or by connecting a  
home audio or autosound system to  
the CD player’s LINE OUT jack.  
Listening Safely  
To protect your hearing, follow these  
guidelines when you use earphones  
or headphones.  
• Set the volume to the lowest set-  
ting before you begin listening.  
After you begin listening, adjust  
the volume to a comfortable level.  
Note: If the jacks on your equipment  
do not match the plugs on the sup-  
plied Y-cable, check with your local  
RadioShack store for the proper cable  
adapter.  
• Do not listen at extremely high  
volume levels. Extended high-  
volume listening can lead to per-  
manent hearing loss.  
CONNECTING  
EARPHONES/  
HEADPHONES  
• 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.  
For private listening, you can plug a  
pair of stereo earphones or head-  
1
phones with a /8-inch plug (not sup-  
plied) into the PHONES jack on the CD  
player.  
Traffic Safety  
Do not wear earphones or head-  
phones while operating a motor vehi-  
cle or riding a bicycle. This can create  
a traffic hazard and could be illegal in  
some areas.  
Even though some earphones and  
headphones let you hear some out-  
side sounds when listening at normal  
volume levels, they still can present a  
traffic hazard.  
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CONNECTING  
AMPLIFIED SPEAKERS  
CONNECTING TO AN  
AUTOSOUND SYSTEM  
You can listen to your CD player  
through optional amplified speakers  
(such as Cat. No. 40-1387). Plug the  
You can listen to your CD player  
through your autosound system in one  
of the following ways:  
1
speaker cable’s /8-inch plug into the  
• If your autosound system has  
LINE IN jacks, connect the sup-  
PHONES  
CD player’s  
jack.  
1
plied Y-cable’s /8-inch plug to the  
LINE OUT  
CD player’s  
jack. Then  
connect the Y-cable’s phono  
plugs to your autosound system’s  
LINE IN input jacks.  
CONNECTING TO A  
HOME AUDIO SYSTEM  
You can listen to your CD player  
through your home audio system’s  
amplifier/receiver and full-size speak-  
ers. Connect the supplied Y-cable’s  
• If your autosound system has a  
CD input jack, connect one end of  
a 1/8-inch stereo patch cable (such  
as Cat. No. 42-2387, not supplied)  
1/8-inch plug to the CD player’s  
LINE  
LINE OUT  
to the CD player’s  
jack.  
OUT  
jack. Then connect the Y-cable’s  
Then connect the other end to  
your autosound system’s CD  
INPUT jack.  
phono plugs to your audio system’s  
left and right CD, AUX, or TV audio in-  
put jacks.  
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• If your autosound system has a  
cassette deck, connect the sup-  
plied CD-to-cassette adapter’s  
plug to the CD player’s PHONES  
jack. Then insert the adapter’s  
other end into your cassette deck  
just like a standard cassette.  
You can mount your CD player  
Note:  
in your car using an optional mounting  
bracket. Your local RadioShack store  
has a complete line of mounting  
brackets and hardware.  
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OPERATION  
LOADING A CD  
PLAYING A CD  
Caution: To help prevent dust from  
entering the CD player, always keep  
the CD compartment cover closed ex-  
cept when loading or unloading CDs.  
Warning: To protect your hearing if  
you are using earphones or head-  
phones, set VOLUME to its lowest set-  
ting before you play a CD.  
1. Set OFF/RESUME/HOLD to OFF.  
Press PLAY/PAUSE. The CD player  
automatically turns on and 00 briefly  
flashes on the display. Then  
and  
the current track number appear and  
Track 1 begins to play.  
2. Slide OPEN in the direction of the  
arrow and lift the CD compartment  
cover.  
If you connected an earphone/head-  
phones or amplified speakers to the  
CD player’s PHONES jack, use VOL-  
UME on the CD player to adjust the  
volume.  
3. Carefully place a CD, label side  
up, over the center hub inside the  
CD compartment. Then gently  
press the center of the CD until it  
snaps down onto the center hub.  
Center Hub  
If you connected the CD player to your  
home audio system or autosound sys-  
tem using the LINE OUT jack, you  
must use the home audio or auto-  
sound system’s volume control to ad-  
just the volume.  
4. Close the compartment cover.  
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If you connected an external power  
source, the CD player’s buttons light  
until you stop the CD and turn the CD  
player off, or the CD player turns itself  
off automatically.  
To turn on the anti-shock system, set  
DAS OUT/IN to IN. If the CD player is  
playing a CD, the sound briefly stops,  
then  
appears on the display  
and the sound continues.  
To temporarily stop play, press PLAY/  
PAUSE.  
flashes. To resume  
play, press PLAY/PAUSE again.  
When the last track finishes playing,  
the CD stops and the display alter-  
nately shows the total number of  
tracks and total playing time of the CD  
for about 2 minutes, then the CD play-  
er automatically turns off. To turn it off  
sooner, press STOP/CLEAR.  
AUTOMATIC SEARCH  
MUSIC SYSTEM (ASMS)  
You can use ASMS before or during  
regular or programmed play (see “Pro-  
grammed Play” on Page 17) to quickly  
locate any track on a CD.  
While the CD is stopped, repeatedly  
press  
or  
to move backward  
or forward to the desired track. Press  
PLAY/PAUSE to play the track.  
DIGITAL ANTI-SHOCK  
SYSTEM (DAS )  
2
During play, press  
the beginning of the current track.  
Press twice to return to the be-  
to return to  
Your CD player contains special cir-  
cuits to overcome sound skipping  
problems caused by shock or vibra-  
tion. This means you can carry the CD  
player anywhere you go or use it in  
your vehicle. When you turn on the  
anti-shock system, the CD player con-  
tinuously saves 3 seconds (42-5075)  
or 10 seconds (42-5076) of music in  
memory. During a shock or vibration  
that would normally make a track skip  
or pause, the CD player plays directly  
from memory.  
ginning of the previous track. To move  
to the beginning of the next track,  
press  
.
The CD player consumes addi-  
Note:  
tional battery power when you use the  
anti-shock system. When you use the  
CD player in a stable location, set DAS  
OUT/IN to OUT to save battery power.  
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To turn off the anti-shock system, set  
DAS OUT/IN to OUT. The sound briefly  
VIEWING THE ELAPSED  
TIME  
stops, then  
display.  
disappears from the  
To display the current track’s elapsed  
time, hold down MEMORY/E-BASS for  
about 1 second. Hold down MEMORY/  
E-BASS again to return to the current  
track display.  
LOCKING THE  
CONTROLS  
You can protect your CD player from  
accidental program changes by lock-  
ing all controls except OPEN, VOL-  
UME, DAS OUT/IN (and OFF/RESUME/  
HOLD itself).  
To turn on the control lock, set OFF/  
RESUME/HOLD to HOLD. To turn it off,  
set OFF/RESUME/HOLD to OFF.  
TURNING E-BASS ON  
AND OFF  
To enhance the bass sound, press  
MEMORY/E-BASS.  
appears on  
the display. To turn the bass sound  
off, press MEMORY/E-BASS again.  
disappears from the display.  
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AUDIBLE SEARCH  
INTRO SCAN  
To search forward or backward during  
You can set the stereo to play the first  
10 seconds of each track on the CD,  
so you can find the track you want to  
listen to.  
.
play, hold down  
or  
The CD  
plays rapidly and you hear the music at  
a high speed and low volume. The cur-  
rent track’s elapsed time appears on  
the display.  
To begin scanning, repeatedly press  
PLAY MODE  
until  
appears on the  
display. Intro scan starts from the first  
track.  
To return to normal play, repeatedly  
PLAY MODE  
press  
until  
disap-  
pears.  
Release the button to resume normal  
play.  
Notes:  
• Intro scan plays the tracks in the  
programmed order if you have  
programmed a sequence (see  
“Programmed Play” on Page 17).  
Note: If you hold down  
while the  
last track is playing, audible search  
starts again at the beginning of that  
same track. If you hold down  
during the first track, audible search  
stops at the beginning of Track 1.  
• You can use  
skip through the tracks.  
and  
to  
PAUSE/CUE  
REPEAT PLAY  
To temporarily pause play, press  
You can repeat a single track on the  
CD, all tracks on the CD, or a pro-  
grammed sequence (see “Pro-  
grammed Play” on Page 17).  
PLAY/PAUSE  
play. Press  
sume play.  
.
flashes on the dis-  
PLAY/PAUSE  
again to re-  
PLAY/PAUSE  
You can also use  
to se-  
PLAY  
To repeat a single track, press  
lect (cue) a track before playing.  
When the CD player is stopped, press  
MODE  
once while the desired track is  
playing.  
appears on the display,  
or  
to select the track you  
and the CD player continuously re-  
plays the track.  
PLAY/  
want to cue. Then press  
PAUSE  
twice.  
flashes.  
When you are ready to play the track,  
PLAY/PAUSE  
press  
again.  
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To cancel random play, repeatedly  
press PLAY MODE until  
disap-  
pears.  
PROGRAMMED PLAY  
You can program up to 24 tracks from  
the loaded CD to play in any order you  
choose, and you can program the  
same track to play more than once.  
To repeat all tracks on a CD or in a pro-  
grammed sequence, press PLAY  
MODE twice.  
appears on the  
display.  
Follow these steps to program and  
play a sequence.  
1. While the CD is stopped, hold  
down MEMORY/E-BASS for about  
3 seconds. The display shows the  
selection number (01) and the  
track number (00), and  
flashes.  
When the CD player reaches the end  
of the CD or the programmed se-  
quence, it continuously returns to the  
first track and replays all the tracks.  
2. Repeatedly press either  
or  
to display the number of the  
first track you want to program.  
To cancel repeat play, repeatedly  
3. Press MEMORY/E-BASS to store  
the selected track number. The  
selection number advances by  
one and the track number returns  
to 00.  
press PLAY MODE until  
and  
disappear,  
RANDOM PLAY  
4. Repeat Steps 2 and 3 for each  
track you want to program, up to  
24 tracks.  
In random play, the CD player plays all  
the tracks once in random order, then  
automatically stops. To start random  
play, repeatedly press PLAY MODE until  
appears on the display.  
When you store the 24th  
Note:  
track in memory, FuLL appears.  
5. To play the programmed se-  
quence, press PLAY/PAUSE.  
lights and the first track in the  
sequence plays.  
If you select random play during  
Note:  
programmed play, the CD player  
stops the programmed sequence and  
starts random play of all tracks.  
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While the programmed sequence  
RESUME  
plays, you can use  
to move  
forward or  
in the sequence.  
to move backward  
You can set the CD player to remem-  
ber the track it was playing when you  
stopped the CD or it turned itself off.  
That way, when you play the CD  
again, the CD player resumes playing  
at the beginning of that track.  
6. After the last programmed track  
ends, the CD player stops. To stop  
the CD before the end of the  
sequence, press STOP/CLEAR.  
To set the CD player to resume, set  
OFF/RESUME/HOLD to RESUME at any  
time. Then, after you have pressed  
STOP/CLEAR to turn off the CD player,  
you can simply press PLAY/PAUSE to  
resume play.  
You can replay, check, or add  
Note:  
to the programmed sequence within 2  
minutes after play stops. Otherwise,  
the CD player turns off and clears the  
programmed sequence.  
To replay the programmed se-  
quence, press PLAY/PAUSE.  
To cancel resume play, set OFF/  
RESUME/HOLD to OFF or open the CD  
compartment.  
To check the programmed se-  
quence, press MEMORY/E-BASS.  
The display shows the number of  
the first programmed track. Each  
time you press MEMORY/E-BASS,  
the display shows the number of  
the next track in the sequence.  
Notes:  
• If you press STOP/CLEAR very  
close to the beginning or end of a  
track, the CD player might play  
the track before or after that track  
instead when you press PLAY/  
PAUSE. This is not a malfunction.  
To add to the end of a pro-  
grammed sequence, repeatedly  
press MEMORY/E-BASS until track  
number 00 appears. Then follow  
Steps 3 and 4.  
• If you install a different CD while  
OFF/RESUME/HOLD is set to RE-  
SUME, play might not start from  
Track 1 on the new CD. If this  
happens, press STOP/CLEAR, set  
OFF/RESUME/HOLD to OFF, then  
press PLAY/PAUSE again.  
To clear the programmed sequence  
from memory, press STOP/CLEAR  
twice or open the CD compartment  
door.  
18  
 
42-5075.fm Page 19 Thursday, August 12, 1999 1:03 PM  
TROUBLESHOOTING  
If you have problems operating your CD player, check this chart. If these sugges-  
tions do not solve the problem, contact your local RadioShack store for assistance.  
Problem  
Possible Cause  
Solution  
The CD player does not  
work.  
OFF/RESUME/HOLD is  
set to HOLD.  
Set OFF/RESUME/HOLD  
to OFF.  
No power.  
Be sure the batteries are  
not weak.  
Make sure an AC adapter  
or the DC adapter is  
properly connected.  
If you are using a DC  
adapter to power the CD  
player, check the adapt-  
er’s fuse. See “Replacing  
the DC Adapter’s Fuse”  
on Page 21.  
A CD is loaded, but the  
CD player does not  
start.  
The CD is loaded  
upside-down.  
Reload the CD, label side  
up.  
The CD is dirty or  
defective.  
Clean the CD and reload  
it, or try a different CD.  
See “Replacing the DC  
Adapter’s Fuse” on  
Page 21.  
Sound from a CD skips. The CD is dirty or  
defective.  
Clean the CD and reload  
it, or try a different CD.  
See “Replacing the DC  
Adapter’s Fuse” on  
Page 21.  
Vibration is excessive.  
Set DAS OUT/IN to IN.  
Place the CD player in a  
different location.  
Moisture has con-  
densed on the pickup  
lens.  
Wait 1 hour for the mois-  
ture to evaporate.  
19  
 
42-5075.fm Page 20 Thursday, August 12, 1999 1:03 PM  
CARE AND MAINTENANCE  
Your Optimus CD-3680/CD-3690 Portable Compact Disc Player with Digital Anti-  
Shock is an example of superior design and craftsmanship. The following sugges-  
tions will help you care for your CD player so you can enjoy it for years.  
Keep the CD player dry. If it gets wet, wipe it dry immediately. Liquids  
might contain minerals that can corrode the electronic circuits.  
Use and store the CD player only in normal temperature environ-  
ments. Temperature extremes can shorten the life of electronic de-  
vices, damage batteries, and distort or melt plastic parts.  
Keep the CD player away from dust and dirt, which can cause prema-  
ture wear of parts.  
Handle the CD player gently and carefully. Dropping it can damage  
circuit boards and cases and can cause the CD player to work im-  
properly.  
Use only fresh batteries of the required size and type. Batteries can  
leak chemicals that damage your CD player’s electronic parts.  
Wipe the CD player with a damp cloth occasionally to keep it looking  
new. Do not use harsh chemicals, cleaning solvents, or strong deter-  
gents to clean the CD player.  
Modifying or tampering with the CD player’s internal components can cause a mal-  
function and might invalidate your CD player’s warranty and void your FCC authori-  
zation to operate it. If your CD player is not performing as it should, take it to your  
local RadioShack store for assistance.  
20  
 
42-5075.fm Page 21 Thursday, August 12, 1999 1:03 PM  
REPLACING THE DC  
ADAPTER’S FUSE  
CD CARE TIPS  
Even though a CD is very durable, you  
should handle it with care.  
If the CD player stops operating,  
check the fuse in the DC adapter’s  
cigarette-lighter plug. If it has blown,  
follow these steps to replace it with a  
3-amp, 5 × 20 mm, fast-acting fuse  
such as Cat. No. 270-1054 (not sup-  
plied).  
• Keep the CD inside the CD player  
or in its protective case or sleeve  
when you are not playing it.  
• Handle a CD by its edges to avoid  
fingerprints that can prevent the  
CD player’s laser beam from  
accurately reading the CD. Your  
local RadioShack store sells a  
suitable CD cleaner kit.  
Caution: Using a fuse that does not  
meet these ratings can damage your  
CD player or the vehicle’s electrical  
system.  
• Do not write on either side of the  
CD, particularly the non-label  
side. (Signals are read from the  
non-label side.)  
1. Carefully unscrew the tip of the  
cigarette-lighter plug.  
• Keep the CD dry. A water drop  
can act as a lens and affect the  
laser beam’s focus.  
• Never use chemicals such as  
record cleaning sprays, anti-static  
sprays or fluids, benzene or thin-  
ner to clean CDs. These chemi-  
cals will permanently damage the  
plastic surface of the CD.  
2. Remove the old fuse and replace  
it with the new fuse.  
3. Screw the cigarette-lighter plug’s  
tip back onto the body.  
• If a CD skips when you try to  
play it, the CD might be  
scratched.  
Your  
local  
Ra-  
dioShack store sells a Scratch ’n  
Fix kit (Cat. No. 42-127) that  
might stop the skip. Also see  
“Troubleshooting” on Page 19.  
21  
 
42-5075.fm Page 22 Thursday, August 12, 1999 1:03 PM  
SPECIFICATIONS  
AUDIO  
Frequency Response (±3 dB) ........................................................... 20–20,000 Hz  
Dynamic Range ............................................................................................. 80 dB  
Signal-to-Noise Ratio ..................................................................................... 80 dB  
Harmonic Distortion at 1 kHz ........................................................................ 0.07%  
Separation at 1 kHz ....................................................................................... 55 dB  
Wow/Flutter .................................................................................... Not Measurable  
Earphones Output (10% THD at 32 ohm) ......................................... 7 mW + 7 mW  
Line Output ..................................................................................................... 0.6 V  
SIGNAL FORMAT  
Sampling Frequency ................................................................................. 44.1 kHz  
Oversampling .............................................................................................. 8 Times  
Quantization Number ............................................................ 16-Bit Linear/Channel  
Transmission Bit Rate ............................................................... 4.3218 Mb/Second  
Signal-Processing Rate .......................................................................... 352.8 kHz  
PICK-UP  
Tracking System ....................................................... 3-Beam Tracking Servo Type  
Object Lens Drive System ......................................... 2-Dimensional Parallel Drive  
Optical Source ....................................................................... Semiconductor Laser  
Wavelength .................................................................................................. 780 nm  
GENERAL  
Power Requirements .................................................... DC 3V; Two AA Alkaline or  
Rechargeable Nickel-Cadmium Batteries (not supplied),  
DC Adapter (supplied)  
AC Adapter such as 273-1664 (not supplied),  
Power Consumption .......................................................................................... 8 W  
2
Battery Life (EIAJ Method) ................................................. 7 Hours (with DAS off)  
Dimensions (HWD) ........................... 11/8 × 51/16 × 53/8 Inches (32 × 129 × 137 mm)  
Weight (without batteries) ................................................................. 9.5 oz (270 g)  
Included Accessories .................................. Y-Cable, DC Adapter, CD-to-Cassette  
Adapter, Carrying Case (CD-3690 only)  
Specifications are typical; individual units might vary. Specifications are subject to  
change and improvement without notice.  
22  
 
42-5075.fm Page 23 Thursday, August 12, 1999 1:03 PM  
NOTES  
23  
 
42-5075.fm Page 24 Thursday, August 12, 1999 1:03 PM  
Limited One-Year Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workmanship under  
normal use for one (1) year 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 FIT-  
NESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE DURATION OF THE WRIT-  
TEN LIMITED WARRANTIES CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL  
HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH  
RESPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PER-  
FORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUDING,  
BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS OF TIME, DATA,  
PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL  
DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of incidental 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, unless 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 property 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 re-  
mainder 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, alter-  
ation, 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 adjust-  
ment 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  
9A7  
Printed in Thailand  
 

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