Optimus Portable CD Player CD 3620 User Manual

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Cat. No. 42-5073/42-5074  
OWNER’S MANUAL  
Please read before using this equipment.  
Portable Compact Disc Player  
CD-3620 (42-5073)  
CD-3640 (42-5074)  
 
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Hold — prevents accidentally chang-  
ing the CD player’s control settings  
and conserves battery life by locking  
most controls when you turn off 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.  
Three Power Sources — let you  
power your CD player from two stan-  
dard or rechargeable nickel-cadmium  
AA batteries, standard AC power (with  
an optional AC adapter), or your vehi-  
cle’s battery (with an optional DC  
adapter).  
We recommend you record the CD  
player’s serial number here. The num-  
ber is in the battery compartment.  
Serial Number __________________  
5- or 3-Inch CD Compatible  
Important: You need a pair of stereo  
headphones, amplified speakers, or a  
home audio or car stereo system to  
use your CD-3620/CD-3640. Your lo-  
cal RadioShack store carries a com-  
plete line of these items.  
CDs that can be played on this player  
have this mark on them:  
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CONTENTS  
Power Sources ..................................................................................................... 5  
Using Batteries ................................................................................................ 5  
Installing Batteries ..................................................................................... 6  
Using AC Power .............................................................................................. 7  
Using Vehicle Battery Power ........................................................................... 8  
Connections ......................................................................................................... 9  
Connecting Earphones .................................................................................... 9  
Listening Safely ......................................................................................... 9  
Traffic Safety ............................................................................................. 9  
Connecting Amplified Speakers .................................................................... 10  
Connecting to a Home Audio System ............................................................ 10  
Connecting to an Autosound System ............................................................ 10  
Operation ............................................................................................................ 12  
Playing a CD .................................................................................................. 12  
Digital Anti-Shock System (DAS2) (CD-3640 only) ........................................ 13  
Locking the Controls ...................................................................................... 14  
Audible Search .............................................................................................. 14  
Automatic Search Music System (ASMS) ..................................................... 14  
Pause and Cue .............................................................................................. 14  
Intro Scan ...................................................................................................... 15  
Repeat Play ................................................................................................... 15  
Random Play ................................................................................................. 16  
Programmed Play .......................................................................................... 16  
Troubleshooting ................................................................................................. 18  
Care and Maintenance ....................................................................................... 19  
CD Care Tips ................................................................................................. 20  
FCC Information ............................................................................................ 20  
Laser Safety .................................................................................................. 20  
Specifications ..................................................................................................... 21  
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POWER SOURCES  
You can power your CD player from:  
• Two AA batteries  
Cautions:  
• Use only fresh batteries of the re-  
quired size and recommended  
type.  
• Standard AC power, using an AC  
adapter  
• Do not mix old and new batteries,  
different types of batteries (stan-  
dard, alkaline, or rechargeable),  
or rechargeable batteries of differ-  
ent capacities.  
• A vehicle’s battery power, using a  
DC adapter  
USING BATTERIES  
All types of nickel-cadmium batteries  
come fully discharged. Be sure to fully  
charge the batteries before you use  
them the first time.  
You can power your CD player from  
battery power using:  
Two AA alkaline batteries (such  
as RadioShack Cat. No. 23-552)  
Charging Tips  
Two special AA rechargeable  
nickel-cadmium batteries (RSU  
No. 11672508, available through  
your local RadioShack store).  
• It takes about 14 hours to charge  
fully discharged nickel-cadmium  
batteries in the CD player while it  
is not being used to play CDs.  
You can charge these batteries  
while they are in the battery com-  
partment using an AC or DC  
adapter. (See “Using AC Power”  
on Page 7 or “Using Vehicle Bat-  
tery Power” on Page 8.)  
• When the nickel-cadmium batter-  
ies fully charge, unplug the  
adapter from the AC outlet or cig-  
arette-lighter socket, then discon-  
nect the adapter from the CD  
player.  
Two standard AA rechargeable  
nickel-cadmium batteries (such  
as Cat. No. 23-125).  
• You can play a CD while recharg-  
ing the special nickel-cadmium  
batteries; however, this will cause  
the batteries to recharge more  
slowly.  
Your CD player does not recharge  
standard AA rechargeable batter-  
ies inside its battery compartment,  
but you can charge them with an  
external battery charger (Cat. No.  
23-133).  
• Always keep the charging termi-  
nals on the rechargeable batteries  
clean. Use a cotton swab dipped  
in alcohol to clean the terminals.  
• Under normal usage conditions,  
nickel-cadmium batteries can be  
recharged about 500 times.  
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• Fully discharge the batteries occa-  
sionally by playing the CD player  
until it no longer plays. Then fully  
recharge the batteries. This helps  
restore the batteries’ full charging  
capacity.  
Installing Batteries  
• Avoid charging the batteries in a  
hot environment (above 113°F) as  
this can permanently reduce the  
batteries’ charging capacity.  
1. Press down on the battery com-  
partment cover and slide it away  
from the CD player, then lift the  
cover.  
Caution: Do not overcharge the bat-  
teries. Overcharging can significantly  
reduce the batteries’ useful life.  
2. Place two AA batteries in the com-  
partment as indicated by the po-  
larity symbols (+ and –) marked  
inside.  
Important: This CD player is capable  
of using rechargeable nickel-cadmium  
batteries. At the end of the batteries’  
useful life, they must be recycled or  
disposed of properly. Contact your lo-  
cal, county, or state hazardous waste  
management authorities for informa-  
tion on recycling or disposal programs  
in your area. Some options that might  
be available are: municipal curb-side  
collection, drop-off boxes at retailers  
such as your local RadioShack store,  
recycling collection centers, and mail-  
back programs.  
3. Close the battery compartment  
cover.  
Replace or recharge the batteries  
when  
flashes on the display, the  
sound distorts, or the volume weak-  
ens.  
Cautions:  
• Always dispose of old batteries  
promptly and properly; do not burn  
or bury them.  
• If you do not plan to use the CD  
player for a month or more, re-  
move and store the batteries.  
• Never leave dead, old, or weak  
batteries in the CD player. Batter-  
ies can leak chemicals that cor-  
rode or damage electronic  
circuits.  
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Follow these steps to use an AC  
adapter.  
USING AC POWER  
You can power the CD player from a  
standard AC outlet using an AC  
adapter, such as Cat. No. 273-1664.  
Cautions:  
• You must use an AC adapter that  
supplies 6 volts, and delivers at  
least 400 milliamps (CD-3620) or  
500 milliamps (CD-3640). Its cen-  
ter tip must be set to positive, and  
its barrel plug must correctly fit the  
1. Attach the 4.0 mm outer diameter/  
1.7 mm inner diameter barrel plug  
to the adapter cord, matching + on  
the plug with TIP on the cord.  
DC IN 6V  
CD player’s  
jack. The  
2. Set the adapter’s voltage switch to  
6V.  
recommended adapter meets  
these specifications. Using an  
adapter that does not meet these  
specifications could damage the  
CD player or the adapter.  
3. Insert the adapter’s barrel plug  
DC IN 6V  
into the CD player’s  
jack.  
4. Plug the other end of the adapter  
into a standard AC outlet.  
• When you finish using the AC  
adapter, disconnect it from the AC  
outlet first, then unplug it from the  
CD player.  
• Battery power disconnects when  
you connect an AC adapter to the  
CD player unless you are using  
special  
rechargeable  
nickel-  
cadmium batteries (see “Using  
Batteries” on Page 5). If you plan  
to use the CD player with AC  
power for an extended period of  
time (8 hours or more), remove  
the special nickel-cadmium batter-  
ies to prevent overcharging.  
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• Battery power disconnects when  
you connect a DC adapter to the  
CD player unless you are using  
USING VEHICLE  
BATTERY POWER  
special  
rechargeable  
nickel-  
You can power your CD player from  
your vehicle’s battery using a DC  
adapter, such as Cat. No. 273-1801.  
cadmium batteries (see “Using  
Batteries” on Page 5). If you plan  
to use the CD player with vehicle  
battery power for an extended pe-  
riod of time (8 hours or more), re-  
move the special nickel-cadmium  
batteries to prevent overcharging.  
Cautions:  
• You must use a DC adapter that  
supplies 6 volts and delivers at  
least 500 milliamps. Its center tip  
must be set to positive, and its  
barrel plug must correctly fit the  
Follow these steps to use your vehi-  
cle’s battery power.  
DC IN 6V  
CD player’s  
jack. The  
recommended adapter meets  
these specifications. Using an  
adapter that does not meet these  
specifications can damage the CD  
player or the adapter.  
• Disconnect the adapter from the  
cigarette-lighter socket when you  
are not using it, to prevent the ve-  
hicle’s battery from being drained.  
1. Attach the 4.0 mm outer diameter/  
1.7 mm inner diameter barrel plug  
to the adapter cord, matching the  
+ on the plug with TIP on the cord.  
• Always disconnect the adapter  
from the cigarette-lighter socket  
before you unplug it from the CD  
player.  
2. Set the adapter’s voltage switch to  
6V.  
3. Insert the adapter’s barrel plug  
• If you park your vehicle in the sun,  
temperatures inside can easily  
reach levels that could damage  
your CD player and your CDs. To  
prevent heat damage, avoid leav-  
ing your CD player or CDs in your  
vehicle.  
DC IN 6V  
into the CD player’s  
jack.  
4. Plug the other end of the adapter  
into your vehicle’s cigarette-lighter  
socket.  
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CONNECTIONS  
You can listen to your CD player by  
connecting optional stereo earphones  
or amplified speakers to the player’s  
PHONES jack, or by connecting a  
home audio or car stereo system to  
the player’s LINE OUT jack.  
Listening Safely  
To protect your hearing, follow these  
guidelines when you use earphones.  
• Set the volume to the lowest set-  
ting before you begin listening. Af-  
ter you begin listening, adjust the  
volume to a comfortable level.  
You can mount your CD player in your  
car using a mounting bracket. Your lo-  
cal RadioShack store has a complete  
line of mounting kits.  
• Do not listen at extremely high  
volume levels. Extended high-  
volume listening can lead to per-  
manent hearing loss.  
CONNECTING  
EARPHONES  
• 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, plug a pair of ste-  
reo earphones with a 1/8-inch plug (not  
supplied) into the CD player’s  
PHONES jack.  
Traffic Safety  
Do not wear earphones while operat-  
ing a motor vehicle or riding a bicycle.  
This can create a traffic hazard and  
could be illegal in some areas.  
Even though some earphones let you  
hear some outside sounds when lis-  
tening at normal volume levels, they  
still can present a traffic hazard.  
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CONNECTING  
AMPLIFIED SPEAKERS  
CONNECTING TO AN  
AUTOSOUND SYSTEM  
To listen to your CD player through a  
pair of amplified speakers, plug the  
speakers’ 1/8-inch plug into the CD  
You can listen to your CD player  
through your autosound system in one  
of three ways.  
PHONES  
player’s  
jack.  
If your autosound system has LINE IN  
jacks, connect the supplied Y-cable’s  
1/8-inch plug to the CD player’s  
LINE  
OUT  
jack. Then connect the Y-cable’s  
phono plugs to your autosound sys-  
tem’s LINE IN input jacks. (If the jacks  
on your equipment do not match the  
plugs on the cable, check with your lo-  
cal RadioShack store for the proper  
cable adapter.)  
PHONES Jack  
CONNECTING TO A  
HOME AUDIO SYSTEM  
To listen to your CD player through  
your home audio system’s amplifier/  
receiver and full-size speakers, con-  
nect the supplied Y-cable’s 1/8-inch  
LINE OUT  
plug to the CD player’s  
jack.  
Auto Sound System with  
Two LINE IN Jacks  
Then connect the Y-cable’s phono  
plugs to the CD, AUX, or TV audio  
LEFT and RIGHT input jacks on your  
amplifier/receiver. (If the jacks on your  
equipment do not match the plugs on  
the Y-cable, check with your local Ra-  
dioShack store for the proper cable  
adapter.)  
Amplifier/Receiver with  
LEFT and RIGHT Input Jacks  
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If your autosound system has a CD in-  
put jack, you need a stereo /8-inch  
If your autosound system has a cas-  
sette player but no CD INPUT or LINE  
IN jacks, you can use a CD-to-  
cassette adapter, such as Cat. No. 12-  
1951. Insert the cassette adapter into  
your car’s cassette player just as you  
would insert a regular cassette. Then  
connect the CD-to-cassette adapter’s  
cord to the CD player’s PHONES jack.  
1
patch cable, such as Cat. No. 42-  
2387. Connect one end to the CD  
player’s LINE OUT jack and the other  
end to the autosound system’s CD IN-  
PUT jack.  
Auto Sound System with  
CD Input Jack  
PHONES Jack  
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OPERATION  
To display the current track’s  
elapsed time, hold down MEM-  
ORY/E-BASS until the elapsed  
time appears. To return to the cur-  
rent track number, hold down  
MEMORY/E-BASS again until the  
current track number appears.  
PLAYING A CD  
1. Set HOLD to OFF.  
CD-3620 CD-3640  
2. Press to open the disc compart-  
ment. Then handling the CD by its  
edges, carefully place it, label side  
up, over the compartment’s center  
hub. Press gently on the CD’s  
center so the CD lies flat in the  
compartment. Then close the  
compartment cover.  
4. Adjust the volume to a comfort-  
able listening level.  
• If you connected headphones,  
amplified speakers, or a CD-to-  
cassette adapter to the CD  
player’s PHONES jack, set VOL-  
UME on the CD player to the  
desired level.  
3. Press PLAY/PAUSE  
. The CD  
player automatically turns on, 00  
flashes on the display, then Track  
1 begins to play. The display  
shows the current track number.  
• If you connected the CD  
player’s LINE OUT jack to your  
home audio system or your  
car’s stereo, use the volume  
controls on those systems to  
set the desired volume level.  
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To enhance the bass sound,  
briefly press MEMORY/E-BASS.  
BASS appears. To return to nor-  
mal sound, press MEMORY/E-  
BASS again. BASS disappears.  
center hub and lift the CD. Then  
close the compartment cover.  
DIGITAL ANTI-SHOCK  
SYSTEM (DAS2)  
(CD-3640 ONLY)  
Your CD-3640 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 the next few seconds  
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.  
5. When the last track finishes play-  
ing, the display alternately shows  
the total number of tracks and to-  
tal playing time of the CD for  
about 2 minutes, then the CD  
player automatically turns off. To  
stop play and turn off the CD  
player sooner, press STOP/CLEAR  
twice.  
To turn on the anti-shock system, set  
DAS on the left side of the CD player  
to IN. If the CD player is playing a CD,  
the sound briefly stops and DAS ap-  
pears.  
Notes:  
• E-Bass turns off when the CD  
player is turned off.  
• If you press STOP during play,  
the CD player exits INTRO,  
RANDOM, and REPEAT play.  
To turn off the anti-shock system, set  
DAS to OUT. The sound briefly stops  
and DAS disappears.  
6. To remove the CD, press  
to  
open the disc compartment. Be  
sure the CD has stopped spin-  
ning, then press the tab in the  
center of the disc compartment’s  
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Note: The CD player consumes addi-  
tional battery power when you use the  
anti-shock system. When you use the  
CD player in a stable location, turn off  
the system to conserve battery power.  
AUTOMATIC SEARCH  
MUSIC SYSTEM (ASMS)  
You can use ASMS before or during  
regular or programmed play (see “Pro-  
grammed Play” on Page 16) to quickly  
locate any track on a CD.  
LOCKING THE  
CONTROLS  
While the CD is stopped, repeatedly  
press  
or  
to move backward  
To prevent accidentally turning the CD  
player on or off, or changing the track  
or forward to the desired track. Press  
PLAY/PAUSE  
to play the track.  
to return to  
HOLD  
ON  
you are listening to, slide  
No controls work except  
to  
.
,
VOLUME  
,
During play, press  
DAS  
HOLD  
.
(CD-3640 only), and  
the beginning of the current track.  
Press again to return to the be-  
HOLD OFF  
trols again.  
Slide  
to  
to operate the con-  
ginning of the previous track. To move  
to the beginning of the next track,  
press  
.
AUDIBLE SEARCH  
PAUSE AND CUE  
Use audible search during play to rap-  
idly search forward or backward for a  
specific section of a track. During au-  
dible search, the CD plays at a lower  
volume and a higher speed. The cur-  
rent track’s elapsed time appears on  
the display.  
To temporarily pause play, press  
PLAY/PAUSE  
the display. Press  
again to resume play.  
.
flashes on  
PLAY/PAUSE  
PLAY/PAUSE  
You can also use  
to select (cue) a track before playing.  
When the CD player is stopped, press  
To search forward, hold down  
To search backward, hold down  
.
.
or  
to select the track you  
PLAY/  
To resume normal play, release the  
control.  
want to cue. Then press  
PAUSE  
twice.  
flashes.  
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To cue a track in a programmed se-  
quence (see “Programmed Play” on  
REPEAT PLAY  
Page 16), press PLAY/PAUSE  
to  
Your CD player can repeatedly play a  
single track, the entire CD, or a pro-  
grammed sequence (see “Pro-  
grammed Play” on Page 16).  
pause the CD.  
press or  
you want to cue.  
flashes. Then  
to display the track  
To play the cued track, press PLAY/  
PAUSE  
To repeat a single track, before or  
during play, repeatedly press PLAY  
.
MODE until  
1 appears. At the end  
of the track, the CD player repeatedly  
plays it.  
INTRO SCAN  
The intro scan feature automatically  
plays the first 10 seconds of each  
track on a CD.  
1
During play, repeatedly press PLAY  
MODE until INTRO appears on the  
display. Intro scan starts from the first  
track.  
To repeat an entire CD or a series of  
programmed tracks, before or during  
regular or programmed play, repeat-  
To return to normal play, press PLAY  
MODE so INTRO disappears from the  
display. The CD player resumes nor-  
mal play.  
edly press PLAY MODE until  
ALL  
appears. When the CD player reaches  
the end of the CD or the programmed  
sequence, it returns to the first track  
and continuously replays all the  
tracks.  
Notes:  
• Intro scan plays the tracks in the  
programmed order if you have  
programmed a sequence (see  
“Programmed Play” on Page 16).  
ALL  
• You can use  
and  
to  
skip through the tracks.  
To cancel repeat play, repeatedly  
press PLAY MODE until  
1 and  
ALL disappear.  
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selection number advances by  
one and the track number on the  
display returns to 00.  
RANDOM PLAY  
In random play, the CD player plays  
all the tracks once in random order,  
then automatically stops. To start ran-  
dom play at any time, repeatedly  
5. Repeat Steps 3 and 4 for each  
track you want to program, up to  
24 tracks.  
PLAY MODE  
press  
until RANDOM ap-  
Note: When you store the 24th  
track in memory, FuLL appears.  
pears.  
Note: If you select random play during  
programmed play, the CD player  
stops the programmed sequence and  
starts random play of all tracks.  
6. To play the programmed se-  
PLAY/PAUSE  
quence, press  
.
PGM appears and the first track in  
the sequence plays.  
While the programmed sequence  
PLAY  
To cancel random play, press  
MODE  
plays, you can use  
or  
so RANDOM disappears.  
to move forward or backward in  
the sequence.  
PROGRAMMED PLAY  
7. After the last programmed track  
ends, the CD player stops. To  
manually stop the CD before the  
You can program up to 24 tracks on a  
CD to play in any order you choose,  
and you can program the same track  
to play more than once.  
STOP/  
end of the sequence, press  
CLEAR  
.
To replay the programmed se-  
PLAY/PAUSE  
within 2 minutes.  
quence, press  
Follow these steps to program and  
play a sequence.  
To check the programmed se-  
PLAY/PAUSE  
1. Press  
the CD player, then press  
CLEAR  
to start  
STOP/  
MEMORY/E-  
quence, press  
BASS  
within 2 minutes. The dis-  
.
play shows the number of the  
first programmed track. Each  
MEMORY/E-BASS  
2. Hold down  
until  
the selection number (01) and the  
track number (00) appear as PGM  
flashes.  
MEMORY/E-  
time you press  
BASS  
, the display shows the  
number of the next track in the  
sequence.  
3. Repeatedly press either  
or  
to display the number of the  
first track you want to program.  
MEMORY/E-BASS  
4. Press  
to store  
the selected track number. The  
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To add to the end of a pro-  
grammed sequence, hold down  
MEMORY/E-BASS until the first  
programmed track appears,  
then repeatedly press MEM-  
ORY/E-BASS (within 2 minutes)  
until track number 00 appears.  
Then follow Steps 3 and 4.  
If you do not press a button within  
2 minutes after the CD player  
stops, it turns off and clears the  
programmed sequence.  
To clear the programmed se-  
quence sooner, press STOP/  
CLEAR  
twice.  
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TROUBLESHOOTING  
With proper care and handling, your CD player should give you years of trouble-  
free service. However, if your CD player is not working properly, follow these sug-  
gestions to see if you can eliminate the problem. If you still have a problem, take  
the CD player to your local RadioShack store for assistance.  
Problem  
Possible Cause  
Suggestion  
Operation controls do  
not work.  
Hold function is active.  
No power.  
Set HOLD to OFF.  
Check the batteries or  
adapter.  
CD is loaded, but it does CD is loaded upside  
Reload the CD, label side  
up.  
not start.  
down.  
CD is dirty.  
Clean the CD or try a differ-  
ent CD. See “CD Care Tips”  
on Page 20.  
The sound skips.  
CD is dirty or scratched. Clean the CD or try a differ-  
ent CD. See “CD Care Tips”  
on Page 20.  
Vibration is heavy.  
Try not to vibrate the CD  
player.  
Try activating the anti-shock  
system. (CD-3640 only)  
Moisture condenses on Wait 1 hour for the moisture  
the pickup lens. to evaporate.  
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CARE AND MAINTENANCE  
Your Optimus CD-3620/CD-3640 Portable Compact Disc Player is an example of  
superior design and craftsmanship. The following suggestions 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. Old 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.  
19  
 
42-5073.fm Page 20 Thursday, August 12, 1999 11:08 AM  
CD CARE TIPS  
FCC INFORMATION  
• Do not place anything but a CD in  
the disc tray. Doing so can dam-  
age the drive mechanism.  
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:  
• During playback, a severe shock  
or jolt could make the CD’s rota-  
tion speed change suddenly and  
produce some noise. This is not a  
malfunction.  
• Always handle a CD by the edges  
and keep it in its protective case  
or sleeve when it is not in use.  
Fingerprints and scratches on the  
CD’s surface can prevent the la-  
ser beam from correctly reading  
the digital information. To clean  
the CD, use a CD cleaner kit (Cat.  
No. 42-226).  
• Increase the distance between the  
CD player and the radio or TV.  
• 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.  
• A scratch on the CD’s surface can  
make the CD skip or stop playing.  
If the CD gets scratched, use  
Scratch ’n Fix (Cat. No. 42-127) to  
repair the scratch.  
LASER SAFETY  
This unit employs a laser. Only quali-  
fied service persons should remove  
the cover or attempt to service this de-  
vice, due to possible eye injury.  
• Keep CDs dry. A water drop can  
act as a lens and affect the laser  
beam focus.  
Warning: The use of controls or ad-  
justments or the performance of pro-  
cedures other than specified herein  
can result in hazardous exposure to  
laser light.  
20  
 
42-5073.fm Page 21 Thursday, August 12, 1999 11:08 AM  
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 ........................................................................................ 70 dB  
Wow/Flutter .................................................................................... Not Measurable  
Headphones Output (10% THD at 32 ohm) ..................................... 6 mW + 6 mW  
Line Output ...................................................................................................... 0.6 V  
Disc  
Diameter ............................................................... Standard 5-Inch and 3-Inch CDs  
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  
21  
 
42-5073.fm Page 22 Thursday, August 12, 1999 11:08 AM  
General  
Power Requirements ................................................ DC 3V; Two AA Size Alkaline  
or Special Rechargeable Nickel-Cadmium Batteries (Not Supplied),  
Optional AC Adapter (273-1664),  
or Optional DC Adapter (273-1801)  
Power Consumption .......................................................................................... 8 W  
Battery Life (EIAJ Method)  
CD-3620 ............................................................................................... 9 Hours  
2
CD-3640 ...................................................................... 7.5 Hours with DAS off  
Dimensions (HWD) ................................................................ 13/16 × 51/4 × 6 Inches  
(30 × 134 × 153 mm)  
Weight (without batteries)  
CD-3620 ........................................................................................ 9 oz (255 g)  
CD-3640 ..................................................................................... 9.1 oz (258 g)  
Included Accessory ..................................................................................... Y-Cable  
Specifications are typical; individual units might vary. Specifications are subject to  
change and improvement without notice.  
22  
 
42-5073.fm Page 23 Thursday, August 12, 1999 11:08 AM  
NOTES  
23  
 
42-5073.fm Page 24 Thursday, August 12, 1999 11:08 AM  
Limited One-Year Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship 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, Ra-  
dioShack 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 LIABILITY OR RE-  
SPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY  
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-  
MANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, IN-  
CLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS  
OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDEN-  
TAL, 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 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  
8A7  
Printed in Thailand  
 

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